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1
Anggara, Denny, Meassy Shawitry Harianja, Alvika Musfitasari, Martha Marselinha, Fransiskus Xaverius Arif Wahyudianto, and Andrian Fernandes. "POTENSI LIMBAH KULIT RAMBUTAN (Nephelium lappaceum) SEBAGAI MINUMAN SEDUHAN HERBAL." JURNAL AGROTEKNOLOGI 13, no. 02 (2020): 131. http://dx.doi.org/10.19184/j-agt.v13i02.11576.
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Rambutan production in Indonesia in 2017 is 523,699 tons. Consuming rambutan fruit will affect rambutan peel as a waste. Although rambutan peel has the potential to be made into herbal brew drinks products. The research aims were to determine the productivity of rambutan peel as a raw material for herbal beverage and estimate the benefits to be obtained. The study used local rambutan fruit raw material. The research was carried out in the Forest Product Laboratory of Dipterocarps Research Center. The research aimed to determine the processing technology of rambutan peel as raw material for herbal beverage and estimated benefits to be gained. The research was conducted in three stages of activity, i.e. calculation of the potential of rambutan peel as raw material for herbal beverage, making of rambutan herbal beverage and estimated its profit. Rambutan peel can be processed into herbal brew drinks using simple technology, by making the rambutan peel into a dry powder and put it into a brewed beverage bag. The brewed beverage packaged in 1 box about 3 bags and each bag containing @ 1.5 g herbal beverage. The estimated profit of 1 box of herbal beverage was about 30.4% of the selling price.
 Keywords: herbal brew drinks, home industry, marine tea, rambutan peel
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Wang, Jiaqi, Wencan Zhu, Chengkun Yang, et al. "Comparative Metabolomic and Transcriptomic Analysis Reveals That Variations in Flavonoids Determine the Colors of Different Rambutan Cultivars." Horticulturae 10, no. 3 (2024): 263. http://dx.doi.org/10.3390/horticulturae10030263.
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Rambutan is a tropical tree and its fruit has several favorable characteristics. To understand how the color of the rambutan fruit peel develops, the transcriptome, flavonoid metabolome, and carotenoid metabolome data of two rambutan cultivars, ‘BY2’ and ‘BY7’, which show yellow and red peels at maturity, respectively, were comprehensively analyzed at three developmental stages. We identified 26 carotenoid components and 53 flavonoid components in these cultivars. Anthocyanins were the main component contributing to the red color of ‘BY7’ after reaching ripeness. The carotenoid content decreased sharply as the fruit matured. Hence, we speculated that flavonols were the main contributors to the yellow color of the ‘BY2’ peel. In total, 6805 differentially expressed genes were screened by transcriptome analysis; the majority of them were enriched in metabolic pathways and the biosynthesis of secondary metabolites. Weighted gene co-expression network analysis results revealed that in addition to MYB and bHLH, ERF, WRKY, MYB-related, and C3H were the main potential transcription factors regulating the color of the rambutan peel. In addition, we also identified 12 structural genes associated with flavonoid biosynthesis. The research findings shed light on the molecular mechanisms of color acquisition in rambutan fruit peels, laying the foundation for the quality control of rambutan and the cultivation of differently colored cultivars of rambutan.
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Sitepu, K. M., and Zainal. "Potential of encapsulated rambutan peel extract (Nephelium lappaceum) as a food preservative." IOP Conference Series: Earth and Environmental Science 1230, no. 1 (2023): 012154. http://dx.doi.org/10.1088/1755-1315/1230/1/012154.
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Abstract Rambutan peel is one of the agricultural wastes that is rarely used and contains several active compounds with antimicrobial properties. The antimicrobial properties of rambutan peel can be used as a food preservative. However, these active compounds are unstable and degraded when exposed to air, heat, light, and water. This problem can be prevented by encapsulating the extract. There are two specific objectives of this study, knowing the types of active compounds contained in rambutan peel extract and determining the best coating material for encapsulated rambutan peel extract. The encapsulation process of rambutan peel extract was done by using thin layer drying method using maltodextrin, gum arabic, and gelatin as coating material. The encapsulated extracts were stored for one month and tested weekly. Test parameters of encapsulated rambutan peel extract were moisture content and antibacterial activity. The result showed that rambutan peel extract contains flavonoids, tannins, and saponins. The use of maltodextrin and gum arabic as coating material was able to maintain bacterial inhibition against Staphylococcus aureus during storage, while the use of gelatin as coating material can only maintain up two weeks of storage. The result also showed that rambutan peel extract could not maintain bacterial inhibition against Escherichia coli during storage.
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Izhar, Iliya Zakirah, Saiful Irwan Zubairi, Zainun Nurzahim, Harisun Yaakob, and Zalifah Mohd Kasim. "Investigating Potential Sources of Sore Throat: Physico-Chemical Attributes and Microbial Contamination in Rambutan from Fresh Harvests and Retail Stores." Sains Malaysiana 53, no. 5 (2024): 1105–18. http://dx.doi.org/10.17576/jsm-2024-5305-11.
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Rambutan (Nephelium lappaceum), a tropical fruit cherished for its succulent flesh and vibrant appearance, is cultivated extensively across various regions worldwide. However, despite its popularity, the fruit faces challenges related to particulate contamination during the harvesting process. Particulate matter contamination refers to the presence of solid or liquid particles suspended in the air or adhered to the fruit's surface, posing potential risks to both consumer health and fruit quality. Hence, this study aims to identify the factors in rambutan that could cause sore throats by analysing its physicochemical properties and conducting a microbiological study. For this study, two samples of rambutan fruit which are rambutan sold in stores (RS) and rambutan freshly harvested from the tree (RT) were collected and analysed for their external peel, internal peel, and pulp parts (n = 3). The assessment included the weight of visible fine dirt, pH value, oil content, surface morphology and total coliform (TPC). The results showed that the weight of visible fine dirt on RT external peel (93.50 ± 5.00 mg) and the pH value of its external peel and pulp (4.17 ± 0.00 - 5.17 ± 0.00) were significantly higher and more acidic (p<0.05) than those of RS. However, there were insignificant differences (p>0.05) in oil content (0.36 ± 0.7 - 0.38 ± 0.8%) between the external peels of the rambutan samples. Additionally, the surface morphology and image analysis of RS showed more foreign particles, represented as black or white dots on its internal peel and pulp, compared to RT, which was suspected to be yeast. Moreover, the total coliform count for both samples was significantly different (p<0.05) in their external peel and pulp, but it was still within the safe eating limit. The study concluded that environmental pollution and contamination during rambutan handling could cause sore throat.
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Senarathne, S. M. A. C. U., S. M. V. G. A. P. Samarakoon, and D. C. K. Illeperuma. "Rambutan (<em>Nephelium lappaceum</em> L.) Fruit Peel: Possibility of Extraction and Incorporation of the Microencapsulated Crude Extract in Product Development." Tropical Agriculturist 171, no. 2 (2023): 51–62. https://doi.org/10.4038/ta.v171i2.29.
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‘Malwane’ rambutan cultivar is popular due to its attractive reddish color peel and easily separable thick flesh. High consumption of rambutan has led to accumulation of a considerable amount of the peel, which contains anthocyanin and other bioactive compounds. Thus, the objective of the present study was to explore the possibility of extracting and using microencapsulated extract obtained from rambutan peel in product development. The frozen peels were extracted with water at 50 °C, microencapsulated using maltodextrin, and spray-dried to a powder (MESP). Physicochemical parameters of water extract of frozen peels (WEFP) and MESP were studied. Pasta and Jelly were carefully made using the MESP and assess the effectiveness of incorporating MESP. The Total Polyphenolic Content of the WEFP was 24.52 ± 0.47 mg mL-1, amounting to 12.3% (g g-1) of the frozen peel. Anthocyanin Content of 24.76 ± 0.04 μg g-1, TPC of 373 ± 7 mg g-1, Antioxidant Activity of 81%, Moisture Content of 7.8 ± 0.0%, and water activity of 0.41 ± 0.004 were observed for the MESP. The incorporation of the MESP in pasta imparted a reddish color, not changed during boiling of the finished product. This indicates the ability of MESP to impart color in starch-based products processed at high temperatures and re-constituted in boiling water. However, coagulation and darkening of color were evident with jelly. The results of this study revealed the potential of utilizing discarded rambutan peels.
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Arum Kusumahastuti, Dewi Kurnianingsih, Rindang A. Laksono, and Ronal F. Hindra. "Valorization of Rambutan Peel as Adsorbent for Tempeh Wastewater." Jurnal Biologi Tropis 23, no. 2 (2023): 55–60. http://dx.doi.org/10.29303/jbt.v23i2.4792.
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Tempeh is one of Indonesia traditional foods which made from fermentation processed soybean. There is wastewater from tempeh production that usually wasted to the river without further treatment. One of the parameters for wastewater is chemical oxygen demand (COD). Higher COD correlated to the higher risk to the environment. To decrease the COD level of tempeh wastewater valorization rambutan peels as adsorbent was done. The adsorbent was prepared by drying up and powdering rambutan peels. Boehm titration was used to characterize some functional groups of rambutan peels. Optimization of the contact time and the acidity level (pH) was done under room temperature condition. As results, the rambutan peel contains carbocyclic (0,0492%), alkaline functional group (0,0360%), phenol (0,0004%) and lactone (0,0002%). Besides, the optimal condition for the reaction were at pH 11 for 90 minutes that can reduce COD level from 23.840 mg/L to 10.230 mg/L.
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Nadhirah, A. Ainatun, S. T. Sam, N. Z. Noriman, Mohd Mustafa Al Bakri Abdullah, Mohd Firdaus Omar, and H. Kamarudin. "Characterization of Linear Low Density Polyethylene/Rambutan Peels Flour Blends: Effect of Loading Content." Key Engineering Materials 673 (January 2016): 171–79. http://dx.doi.org/10.4028/www.scientific.net/kem.673.171.
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The effect of rambutan peels flour (RPF) content on the tensile properties of linear low density polyethylene filled with rambutan peel flour was studied. RPF was melt blended with linear low–density polyethylene (LLDPE). LLDPE/RPF blends were prepared by using twin screw extruder at 150°C with the flour content ranged from 0 to 25 wt%. The tensile properties were tested by using a universal testing machine (UTM) according to ASTM D638. The highest tensile strength was pure LLDPE meanwhile the tensile strength LLDPE/RPF decreased gradually with the addition of rambutan peels flour. Young’s modulus of rambutan peels flour filled LLDPE increased with increasing fiber loading. The crystallinity of the blends was significantly reduced with increasing RPF content. Instead, the water absorption increased with the addition of RPF content.
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Rostinawati, Tina, Ami Tjitraresmi, and Myra Vania Wisnuputri. "In vitro Activity of Rambutan Binjai (Nephelium lappaceum) Peel Extract from Indonesia to Methicillin-Resistant Staphylococcus aureus (MRSA)." Dhaka University Journal of Pharmaceutical Sciences 17, no. 2 (2018): 197–203. http://dx.doi.org/10.3329/dujps.v17i2.39176.
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Methicillin-resistant Staphylococcus aureus (MRSA) is the most common bacteria causing nosocomial infections with high levels of resistance to available antibiotics. So, it is necessary to search for new compounds to solve this problem. Various studies showed antibacterial activity of rambutan peel but for Rambutan Binjai peel extract that are from Indonesia has never been studied against the MRSA. This study aims to determine the antibacterial activity, the value of minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) using agar diffusion method. The concentration of rambutan peel ethanol extract at as much as 62.5 mg/ml showed the inhibitory diameter i.e 21.3 ± 2.4 mm. MIC and MBC were in the same range, which was between 0.98 (mg/ml) to 1.95 (mg/ml). The activity strength of tetracycline against the extract was at 1:50. This revealed that Rambutan Binjai peel extract had great potency as antibacterial agent to MRSA.
 Dhaka Univ. J. Pharm. Sci. 17(2): 197-203, 2018 (December)
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P., Rosmia, Anitha Chandran C., Beela G. K., and Suma D. "Nutrient Composition and Antioxidant Potential of Rambutan (Nephelium lappaceum L) Peel." Advances in Research 25, no. 5 (2024): 201–8. http://dx.doi.org/10.9734/air/2024/v25i51153.
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The present study was conducted to assess the nutri-chemical composition and antioxidant potential of rambutan fruit (Nephelium lappaceum L) peel. Red rambutan fruit peel was used in fresh as well as dried form for the study. The nutri-chemical profiling revealed, fresh peel had 24g/100g of carbohydrate, 2.5g/100g of protein, 0.17g/100 g of fat and 0.89g/100g starch. However, dried peel had 55.45g/100g carbohydrate, 5.25g/100 protein, 10.2g/100g fat and 1.00g/100g starch. Crude fiber content of the fresh and dried peel was 0.77g/100g and 0.068g/100g respectively. Moreover, the fresh peel had higher moisture (73%) content than dried peel (4.2%). Vitamin C being heat liable, was found higher in fresh peel (9.31mg/100g). Sodium and potassium levels was found higher in dried peel powder as 1.55mg/100g and 9.4mg/100g respectively. Phytochemical composition of rambutan peel revealed that total polyphenol was higher in dried peel (580mg/100g) when compared to fresh (310 mg/100 g), meanwhile saponin, tannin and terpenoid was found higher in fresh peel as 47mg/100g, 390mg/100g and 5.101mg/100g respectively. Flavonoid content was dominant in dried peel (20.51mg/100g) than that of fresh peel (9.6mg/100 g). The radical-scavenging activity was expressed as IC50, which reported dried peel (43.79μg/100 mL) had strong antioxidant potential than fresh peel (184.39μg/100mL). However, it is concluded that rambutan peel is a potent source of nutrients, bioactive compounds and antioxidants which in turn has immense therapeutic benefits. Furthermore, valorisation of agri-food wastes and by- products can enhance food security and promote sustainable development.
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Trong, Nguyen Trinh, Phu Huynh Le Tan, Dat Nguyen Ngoc, Ba Le Huy, Dat Tran Thanh, and Nam Thai Van. "Optimizing the synthesis conditions of aerogels based on cellulose fiber extracted from rambutan peel using response surface methodology." AIMS Environmental Science 11, no. 4 (2024): 576–92. http://dx.doi.org/10.3934/environsci.2024028.
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<p>A cellulose-based aerogel has been synthesized from rambutan peel to mitigate environmental pollution caused by agricultural waste, rendering it an eco-friendly material with potential applications in oil spill remediation as well as enhancing the value of this fruit. The objective of this study was to extract cellulose from rambutan peel using chlorination and alkalization processes, followed by optimizing the synthesis conditions of cellulose-based aerogels from rambutan peel through experimental designs to improve oil removal efficiency. In this research, cellulose-based aerogel material was synthesized using the sol-gel method, utilizing waste from rambutan peel as the substrate and polyvinyl alcohol as the cross-linking agent, followed by freeze-drying. A central composite design with 30 different experimental setups was employed to investigate the influence of cellulose content (1.0–2.0%), cross-linking agent (polyvinyl alcohol) content (0.1–0.3%), ultrasonic time (5–15 min), and ultrasonic power (100–300W) on the oil adsorption capacity (g/g) of cellulose-based aerogels from rambutan peel. The research findings demonstrated successful extraction of cellulose from rambutan peel through chlorination, followed by softening with 17.5% (w/v) sodium hydroxide. Response surface plots indicated that maximizing the cellulose component could lead to a maximum diesel oil adsorption capacity of up to 52.301 g/g. Cellulose-based aerogel exhibits ultra-lightweight properties (0.027±0.002 g/cm<sup>3</sup>), high porosity (97.88±0.19), hydrophobicity (water contact angle of 152.7°), and superior oil selective adsorption compared to several commercially available materials in the market, demonstrating promising potential for application in treating oil-contaminated water in real-world scenarios.</p>
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Pratikno, Herman, Harmin Sulistiyaning Titah, and Yossy Kurnia Shandy. "Bio-Inhibitor on Corrosion Rate of ASTM A53 Steel in Marine Environment." MATEC Web of Conferences 177 (2018): 01019. http://dx.doi.org/10.1051/matecconf/201817701019.
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There are many methods to prevent the corrosion process. One of them is corrosion inhibitors usage. Inhibitor divided into two types, there are organic inhibitor and non-organic inhibitor. Organic inhibitor could be obtained by extracting some materials which exist in nature. In this research, bio-inhibitors were made from rambutan (Nephelium lappaceum) peel, banana (Musa acuminata Colla) peel, mango (Mangifera indica L.) leaves and papaya (Carica papaya)leaves. The determination of corrosion rate used weight loss method. The material of carbon steel ASTM A53 was used in the research. The salinity of artificial seawater was 35 ‰. The results showed that corrosion rate on carbon steel ASTM A53 was 0.2172 mpy at mango leaves and the efficiency of those inhibitor was 44.5%. The corrosion rate carbon steel ASTM A53 was 0.2436 mpy for corrosion rate and 37.8% of inhibitor efficiency when it used papaya leaves as bioinhibitor. Meanwhile, it reached 0.2739 mpy and 0.2812 mpy of corrosion rate for banana peel and rambutan peel, respectively. The efficiency of inhibitor were 30% and 28.2% for banana peel and rambutan peel, respectively. The corrosion rate on carbon steel ASTM A53 without inhibitor was 0.3914 mpy. Based on the microstructure results, all specimens in all variation of treatments showed pitting corrosion and uniform corrosion on specimen. In conclusion, mango leaves, papaya leaves, banana peel and rambutan peel have potentially to be used as bio-inhibitor to decrease the corrosion rate in marine environment.
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Nadhirah, A. Ainatun, S. T. Sam, N. Z. Noriman, C. H. Voon, and S. S. Samera. "Tensile Properties of Linear Low Density Polyethylene/Rambutan Peels (Nephelium chryseum Blum.) Flour Blends." Materials Science Forum 803 (August 2014): 348–52. http://dx.doi.org/10.4028/www.scientific.net/msf.803.348.
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Polyethylene (PE) has found well-known use as a packaging material. The effect of rambutan peels flour (RPF) content on the tensile properties of linear low density polyethylene filled with rambutan peel flour was studied. RPF was melt blended with linear low–density polyethylene (LLDPE). LLDPE/RPF blends were prepared by using internal mixer (brabender) at 160 °C with the flour content ranged from 0 to 15 wt%. The tensile properties were tested by using a universal testing machine (UTM) according to ASTM D638. The tensile strength of LLDPE/RPF decreased gradually with the addition of rambutan peels flour content from 0% to 15%. The Young’s modulus of LLDPE/RPF increased with increasing the RPF size and content.
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Sih Wahyuni Raharjeng and Elly Purwati. "FORMULASI DAN UJI MUTU FISIK BODY LOTION EKSTRAK KULIT BUAH RAMBUTAN (Nephelium Lappaceum L.)." Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya 7, no. 1 (2025): 61–69. https://doi.org/10.36526/jc.v7i1.4998.
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Abstract The frequency of cosmetic use in this day and age, cosmetics are made by humans not only from natural ingredients but also artificial ingredients to enhance beauty. Herbal cosmetics are preferred by the public because they have several advantages over chemical cosmetics, including being safe for all skin types, minimal side effects, and for the environment. According to the Central Statistics Agency (BPS) in 2021 Indonesia produced 884,702 tons of rambutan fruit (Nephelium lappaceum L.), and rambutan fruit skin is still a waste that has not been managed properly. Based on the results of previous research, it shows that rambutan fruit peels have various secondary metabolite contents and antioxidant activities that are beneficial to the skin so that they can be formulated as body lotions. The design of this research is experimental research. The initial stage of the study was the preparation of rambutan fruit peel simplisia, then continued with the extraction process of rambutan fruit peel by maceration method, then the process of making body lotion with a concentration of rambutan fruit peel extract (Nephelium lappaceum L.) of 5% (F1) and 10% (F2) using the cold method. The second stage is to evaluate the preparation with phytochemical test, organoleptic test, and spreadability test, homogeneity test, pH test, emulsion type test, viscosity test, and adhesion test. The research was conducted at the Pharmaceutical Biology Laboratory of the Academy of Pharmacy Mitra Sehat Mandiri Sidoarjo. This research was conducted between April 2024-August 2024. Based on the results of stability evaluation of body lotion preparations, rambutan fruit peel waste extract (Nephelium lappaceum L.) can be used for body lotion preparations, with all formulations that have met the requirements. Keywords: Body Lotion, Nephelium Lappaceum L., Physical Quality Test. Abstrak Frekuensi penggunaan kosmetik pada jaman sekarang ini, kosmetik dibuat manusia tidak hanya dari bahan alami tetapi juga bahan buatan untuk meningkatkan kecantikan. Kosmetik herbal lebih disukai masyarakat karena memiliki beberapa kelebihan dari kosmetik kimia, diantaranya adalah aman bagi semua jenis kulit, minim efek samping, dan bagi lingkungan. Menurut Badan Pusat Statistik (BPS) pada tahun 2021 Indonesia menghasilkan 884.702 ton buah rambutan (Nephelium lappaceum L.), dan kulit buah rambutan masih menjadi limbah yang belum terkelola dengan baik. Berdasarkan hasil penelitian sebelumnnya menunjukkan bahwa kulit buah rambutan memiliki berbagai kandungan metabolit sekunder dan aktivitas antioksidan yang bermaanfaat bagi kulit sehingga dapat diformulasikan sebagai body lotion. Rancangan penelitian ini adalah penelitian eksperimen. Tahapan awal penelitian adalah pembuatan simplisia kulit buah rambutan, kemudian dilanjutkan dengan proses ekstraksi kulit buah rambutan dengan metode maserasi, selanjutnya dilakukan proses pembuatan body lotion dengan konsentrasi ekstrak kulit buah rambutan (Nephelium lappaceum L.) sebesar 5% (F1) dan 10% (F2) menggunakan metode dingin. Tahapan kedua adalah dilakukan evaluasi sediaan dengan uji fitokimia, uji organoleptis, uji daya sebar, uji homogenitas, uji pH, uji tipe emulsi, uji viskositas, dan uji daya lekat. Penelitian dilakukan di Laboratorium Biologi Farmasi Akademi Farmasi Mitra Sehat Mandiri Sidoarjo. Penelitian ini dilakukan antara bulan April 2024-Aguatus 2024. Berdasarkan hasil evaluasi stabilitas terhadap sediaan body lotion, Ekstrak limbah kulit buah rambutan (Nephelium lappaceum L.) dapat digunakan untuk sediaan body lotion, dengan seluruh formulasi yang telah memenuhi persyaratan.
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Putri, Rahmawida, Jaka Supriyanta, and Dwi Afriliyani Adhil. "Formulasi dan Uji Aktivitas Sediaan Masker Gel Peel Off Ekstrak Etanol 70% Daun Rambutan (Nephelium Lappaceum L.) Terhadap Propionibacterium Acnes." Journal of Pharmaceutical and Health Research 2, no. 1 (2021): 12–20. http://dx.doi.org/10.47065/jharma.v2i1.836.
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Rambutan Leaves (Nephelium Lappaceum L.) one of the plants that contain, alkaloids, flavonoids, tannins and saponins have antibacterial activity against Propionibacterium acnes which is a bacterium that causes acne. Rambutan leaf extract can be formulated to facilitate its use, one of which is in the form of a gel such as a peel off mask. This study aims to determine the characteristics of peel off mask preparations and to determine the antibacterial activity of ethanol extract 70% rambutan leaves (Nephelium Lappaceum L.) Peel off gel mask preparations 70% ethanol extract rambutan leaves (Nephelium Lappaceum L.) formulated into 4 formulas with a variety of extract concentrations, namely F1 (0%), F2 (10%), F3 (15%), F4 (20%). Physical evaluation tests which include: organoleptic, homogeneity, pH, viscosity, dry time, spreadability, adhesion, and irritation. And the antibacterial activity test was carried out against Propionibacterium acnes bacteria using the well method. The results showed that the physical evaluation was said to be good to meet the requirements. Antibacterial test results of gel peel off mask preparation of 70% ethanol extract of rambutan leaves (Nephelium Lappaceum L.) showed the existence of antibacterial activity against Propionibacterium acnes bacteria inhibition was the best at the concentration of F4 (20%) with an average diameter of 10.03 mm. One way ANOVA analiysis result showed that there wewre significant differences in each formula group (p<0,05).
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Gusman, Josephine Azaria, and Pi-Jen Tsai. "Extraction of Antioxidant Compounds from Rambutan (Nephelium lappaceum L.) Peel as Agricultural Waste in Taiwan." Journal of Tropical Crop Science 2, no. 2 (2015): 10–16. http://dx.doi.org/10.29244/jtcs.2.2.10-16.
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Besides being an agricultural waste, rambutan (Nephelium lappaceum L.) peel has been widely known as good antioxidant source. However, no information about the antioxidant or their way of extraction for rambutan grown in Taiwan can be found. Since its major bioactive compound is geraniin, one of polyphenol compounds, so that total phenolic was used as an index to investigate the optimum condition of extraction from rambutan peel (red and yellow) in Taiwan. Extraction was conducted based on solvent ratio (1:10 to 1:30 g/mL), ethanol concentration (0 to 95 %), ultrasonic extraction temperature (30 to 70°C), and extraction method (conventional from 6 to 36 h at room temperature and ultrasonic from 0.5 to 10 min at 50oC). Results showed that the highest total phenolic content found in red rambutan variety was at 1:15 (g/mL) ratio, but no significant difference for yellow rambutan. Forty percent of ethanolic extraction and 50°C for ultrasonic extraction for both varieties. Conventional method (12 h) and ultrasonic method (2 min) resulted in the highest total phenolic recovery. As to their antioxidant activity in this study, FRAP ranged from 3800.25±86.49 to 4116.5±88.41 (µmol Fe2+/g D.W), flavonoid from 6.41±0.48 to 8.57±0.35 (mg Quercetin/g D.W), and total phenolic recovery from 297.78±4.06 to 358.42±4.63 (mg GAE/g D.W.). This is the first paper regarding the study of rambutan peel in Taiwan.Keywords: Rambutan (Nephelium lappaceum L.), geraniin, antioxidant, agricultural waste
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Mistriyani, Mistriyani, Sugeng Riyanto, Anjar Windarsih, and Abdul Rohman. "Antioxidant Activities and Identification of an Active Compound from Rambutan (Nephelium lappaceum L.) Peel." Indonesian Journal of Chemistry 21, no. 2 (2020): 259. http://dx.doi.org/10.22146/ijc.50421.
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The consumption of rambutan fruit resulted in a vast amount of peels and seeds waste. Therefore, the exploration of active compounds having beneficial effects on human health, such as antioxidants, is very lucrative. This research was aimed to isolate and to identify the active compound as an antioxidant from rambutan peel. The powdered rambutan peel was extracted with a maceration technique using methanol then fractionated using petroleum ether, chloroform, and ethyl acetate to get the corresponding fractions. The extract and fractions were determined for its antioxidant activities in vitro using 2,2’-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and metal-chelating assay. The ethyl acetate fraction exhibited the highest antiradical activity with an IC50 value of 26.22 μg/mL and metal-chelating activity, accounting for 12.32%. The antioxidant activities of extract and fractions correlated with its phenolics and flavonoid contents. Identification of active compounds using FTIR, GC-MS, and NMR resulted in the chemical formula of C7H6O4, identified as 3,4-dihydroxybenzoic acid.
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Utami, Wulandari Putri, Trina Ekawati Tallei, Grace Lendawati Amelia Turalaki, Lydia Estelina Naomi Tendean, Martha Marie Kaseke, and Diana Shintawati Purwanto. "Targeting Prostate Cancer with Rambutan Peel-Derived Compounds via Network Pharmacology." Malacca Pharmaceutics 3, no. 1 (2025): 42–49. https://doi.org/10.60084/mp.v3i1.262.
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Prostate cancer is a prevalent malignancy in men, originating in the prostate gland and often driven by genetic alterations and hormonal dysregulation. Rambutan (Nephelium lappaceum L.) peel, a byproduct of fruit consumption, has demonstrated potential anticancer activity. This study employed a network pharmacology-based in silico approach to evaluate the therapeutic potential of rambutan peel extract in prostate cancer treatment. Bioactive compounds were identified through database searches, and their biological activities were predicted using PASS Online. Pharmacokinetic and toxicity profiles were assessed using ADMETLab 3.0 and Protox 3.0 to evaluate safety and drug-like properties. Potential target proteins were identified via SwissTargetPrediction and GeneCards, while protein-protein interaction networks were constructed using STRING. The pharmacological networks were visualized using Cytoscape to elucidate molecular mechanisms of action. The analysis identified 28 bioactive compounds in rambutan peel extract, with 11 demonstrating activity against prostate cancer (Pa > 0.5). These compounds were deemed safe based on Lipinski's Rule of Five (Ro5) and categorized within toxicity classes V and VI. Rambutan peel extract was found to target 501 proteins associated with prostate cancer, including key pathways involved in resistance to EGFR tyrosine kinase inhibitors. Network pharmacology analysis highlighted several key target genes, including SRC, GNAI1, PIK3CA, PIK3CD, MAPK1, MAPK3, AKT1, GNAI3, PRKCA, and HSP90AA1. Among these, SRC exhibited the highest centrality score, underscoring its pivotal role in disrupting tumorigenic and metastatic signaling pathways, suppressing cancer cell proliferation, and enhancing therapeutic responses. These findings suggest that rambutan peel extract holds promise as a natural therapeutic agent for prostate cancer, warranting further experimental and clinical validation.
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Widodorini, Trining, and Maheswari Nestivia Safitri. "Chitosan mucoadhesive patch combination of rambutan (Nephelium lappaceum L) peel extract decrease leukocyte cell in gingivitis animal model." Indonesian Journal of Dental Medicine 8, no. 1 (2025): 36–41. https://doi.org/10.20473/ijdm.v8i1.2025.36-41.
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Background: Gingivitis, or inflammation of the gingiva, is characterized by increased leukocyte cells as a sign of an inflammatory response. A mucoadhesive patch made from chitosan combined with rambutan (Nephelium lappaceum L) peel extract can reduce inflammation in the gingiva. Chitosan has been proven to inhibit bacterial growth. Meanwhile, rambutan peel extract, as an active ingredient, acts as an anti-inflammatory and anti-bacteria. Purpose: This study aimed to examine the impact of administering rambutan (N. lappaceum L.) peel extract in chitosan mucoadhesive patches made from blood clam shell waste as a treatment for gingivitis on the total leukocyte cell count in white rats. Methods: This research used a true-experimental, post-test-only randomized control group design study, an in vivo study. Wistar rat (Rattus novergicus) gingiva was induced with lipopolysaccharide (LPS) Porphyromonas gingivalis (Pg) for two days and then treated with a mucoadhesive patch for six consecutive days. Histological preparations were made with hematoxylin eosin (HE) staining using a light microscope to observe the total number of leukocyte cells in Wistar rat (R. novergicus) gingival tissue. Results: Based on the outcomes of this study, the Kruskal-Wallis statistical test obtained the total number of leukocyte cells, showing a significant decrease (p < 0.05) at the active ingredient concentrations of 10% and 15% rambutan (N. Lappaceum L.) peel extract in chitosan mucoadhesive patches against the positive control group. Conclusion: Rambutan (N. lappaceum L.) peel extract in chitosan mucoadhesive patches was able to reduce total leukocyte cell count in gingivitis of Wistar rats (Rattus novergicus).
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Perdani, Arum Widyastuti, Arima Diah Setiowati, Bambang Purwono, and Supriyadi Supriyadi. "Color Enhancement of Rambutan Peel Anthocyanins Extracts using Co-Pigmentation with Gallic Acid for pH-Sensitives Dye." Trends in Sciences 22, no. 4 (2025): 9518. https://doi.org/10.48048/tis.2025.9518.
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Rambutan peels typically contain anthocyanins that can be utilized as pH-sensitive dye for intelligent food packaging. Therefore, this study aimed to isolate anthocyanins from rambutan peels and investigate their co-pigmentation with gallic acid (GA) to enhance color intensity while maintaining a pH sensitivity. Rambutan peel anthocyanins extracts (RPAE) were extracted using ultrasound-assisted extraction with 0.2 % citric acid in 96 % ethanol. The purification of RPAE was carried out using a chromatography column with Sephadex LH-20 as the stationary phase. Co-pigmentation was then performed using GA at various molar ratios of RPAE to GA (1:0, 1:100, 1:200, 1:300, 1:400 and 1:500). The results showed that the purification process with Sephadex LH-20 increased the anthocyanins content of RPAE to 157.50 mg CyE/100 g extract. After purification, RPAE was found to primarily consist of cyanidin 5-O-glucoside, delphinidin-3-O-glucoside, cyanidin 3-O-galactoside, delphinidin (aglycon), cyanidin-3-O-glucoside, pelargonidin 3-O-glucoside, and cyanidin (aglycon). Co-pigmentation with GA significantly reduced the degradation of total anthocyanin content compared to native RPAE during the 7-day observation period. Additionally, co-pigmentation with GA enhanced color intensity, as demonstrated by a decrease in the L* value across pH 1-10, an increase in the a* and b* values at low pH, and a decrease in the a* and b* values at high pH. However, compared to non-co-pigmentation, co-pigmentation with GA exhibited more pronounced color differences across varying pH levels, marked by higher a* at low pH and lower b* and L* at high pH. The interaction between GA and RPAE, presumably via hydrogen bonding comprising the carbonyl group of RPAE and GA, produced hyperchromic and bathochromic effects. These findings indicate that co-pigmentation with GA enhances the pH sensitivity of RPAE, making it a promising candidate for developing intelligent food packaging systems that can visually indicate changes in pH, such as monitoring food spoilage or freshness. HIGHLIGHTS The purification of rambutan peel anthocyanins extracts using Sephadex LH-20 increased the yield to 157.50 mg CyE/100 g extract, identifying cyanidin, delphinidin, and pelargonidin derivatives. Co-pigmentation of rambutan peel anthocyanins extracts with gallic acid reduced the degradation of total anthocyanins, increased color intensity, and maintained pH sensitivity. The co-pigmentation mechanism of rambutan peel anthocyanin extracts with gallic acid involved molecular interactions with the carbonyl group of anthocyanins. GRAPHICAL ABSTRACT
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Widyawati, Nugraheni, Lasmono Tri Sunaryanto, and Djoko Murdono. "OPTIMALISASI PEMANFAATAN SUMBER DAYA HAYATI RAMBUTAN KELENGKENG DESA KARANGREJO, BOROBUDUR KABUPATEN MAGELANG MELALUI OKULASI." Agric 28, no. 1 (2017): 55. http://dx.doi.org/10.24246/agric.2016.v28.i1.p55-68.
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<p>ABSTRACT</p><p>Karangrejo village, subdistrict of Borobudur, Magelang regency has Punthuk Setumbu as a very beautiful place to watch the sunrise from the peak of Mounts Merapi and Merbabu with Borobudur shadow in the foreground. Beside its famous sunrise view, Karangrejo also famous with its rambutan fruit with trees nearly at every home yard. From pre-findings activities, there was a certain good rambutan variety that they called “rambutan klengkeng” or longan rambutan. This special kind of rambutan is so sweet, with thick flesh, easy to peel and fresh longer. It has potential to develop it as “Rambutan Karangrejo” as a special local type that become identity and source of income of Karangrejo villagers. The main objective of this activity are: (1) to identify the potentiallity of longan rambutan superior characteristics; (2) to improve the ability of farmers group to multiply the longan rambutan trees through grafting techniques. The method used were survey, focus group discussions, training, demonstration, self practicing and mentoring. The results are: 1. Some fruits that potential to develop are include rambutan, banana and jackfruit. Longan Rambutan fruit have many good characteristics such as its taste, thickness of flesh fruit, flavor, easy to peel and fresh longer. 2. The training for grafting technique have improved the understanding and skills of farmers group in terms of preparing rootstock, eye patch, prepare materials and tools, performing grafting techniques, monitoring and caring the grafting tress.</p>
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Sunardi, Sunardi, Mardiyono Mardiyono, and Nur Hidayati. "Pemanfaatan Scrap Besi Menjadi Copperas dan Ekstrak Kulit Rambutan untuk Pembuatan Nanopartikel Besi yang Ramah Lingkungan." Jurnal Ilmu Lingkungan 20, no. 3 (2022): 494–507. http://dx.doi.org/10.14710/jil.20.3.494-507.
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Dalam beberapa tahun terakhir, pembuatan nanopartikel besi telah menjadi perhatian karena efisiensinya pada penghilangan beberapa jenis zat pencemar. Zat-zat pencemar yang dapat diolah dengan nanopartikel besi antara lain senyawa azo, pelarut terklorinasi, pestisida terklorinasi, anion anorganik dan logam transisi, polutan organik dan anorganik, logam berat, nitrat, bromida, arsen, kromium, timbal, antibiotik, dan pewarna. Pada umumnya, pembuatan nanopartikel besi dilakukan dengan mereduksi besi bermuatan tiga/dua dengan natrium tetra borana, NaBH4. Pembuatan nnanopartikel besi menggunakan NaBH4 menghasilkan produk samping berupa asam borat yang beracun dan gas hidrogen yang mudah meledak atau terbakar. Penelitian ini bertujuan membuat nanopartikel besi dengan memanfaatkan limbah scrap besi menjadi copperas kemudian mereaksikan dengan ekstrak kulit rambutan. Metode yang dilakukan adalah mereaksikan scrap besi dengan asam sulfat sampai terbentuk copperas yang berwarna biru kehijauan. Copperas yang dihasilkan dibuat menjadi larutan kemudian direksikan dengan ekstrak kulit rambutan. Larutan hitam yang dihasilkan dikarakterisasi dengan Spektrofotometri UV-Vis dan TEM. Larutan berwarna hitam dikeringkan dengan cara spray drying kemudian serbuk nanopartikel besi dikarakterisasi dengan XRD, FTIR, dan SEM-EDX. Hasil penelitian menunjukkan bahwa scrap besi dapat dibuat menjadi copperas dengan kadar Fe 22,09%. Ekstrak kulit rambutan mengandung kadar fenol total 877,39 ± 16,6 ppm/100 g kulit rambutan atau setara dengan 441,42 mg GAE/100 g kulit rambutan. Nanopartikel besi berhasil dibuat dari copperas dari scrap besi dan ekstrak kulit rambutan yang mempunyai karakter Surface Plasmon Resonance (SPR) pada serapan 214 nm, ukuran partikel 5-20 nm dalam bentuk larutan dan 20-70 nm dalam bentuk serbuk. Hasil ini bisa menjadi alternatif produksi nanopartikel besi suatu material bermanfaat untuk mencegah terjadinya pencemaran lingkungan. ABSTRACTIn recent years, the manufacture of iron nanoparticles has become a concern because of its efficiency in removing several types of contaminants. Pollutants that can be treated with iron nanoparticles include azo compounds, chlorinated solvents, chlorinated pesticides, inorganic anions and transition metals, organic and inorganic pollutants, heavy metals, nitrates, bromides, arsenic, chromium, lead, antibiotics, and dyes. In general, the manufacture of iron nanoparticles is carried out by reducing three/two charged iron with sodium tetra borane, NaBH4. The manufacture of iron nanoparticles using NaBH4 produces toxic by-products in the form of boric acid and hydrogen gas which is flammable or explosive. This study aims to make iron nanoparticles by utilizing scrap iron waste into copperas then reacting it with rambutan peel extract. The method used is to react iron scrap with sulfuric acid to form copperas which is blue-green in color. The resulting copperas were made into a solution and then treated with rambutan peel extract. The resulting black solution was characterized by UV-Vis Spectrophotometry and TEM. The black solution was dried by spray drying and then the powdered iron nanoparticles were characterized by XRD, FTIR, and SEM-EDX. The results showed that iron scrap can be synthesized into ferrous sulfate with 22.09% Fe content. Rambutan peel extract contains a total phenol content of 877.39 ± 16.6 ppm/100 g rambutan peel or equivalent to 441.42 mg GAE/100 g rambutan peel. Iron nanoparticles were successfully made from copperas from iron scrap and rambutan peel extract with the characteristics of having Surface Plasmon Resonance (SPR) at an absorption of 214 nm, particle size of 5-20 nm in solution form and 20-70 nm in powder form. This result can be an alternative for the production of iron nanoparticles, a useful material to prevent environmental pollution.
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Ummarat, Nittaya, and Kanogwan Seraypheap. "Application of Essential Oils for Maintaining Postharvest Quality of ‘Rongrien’ Rambutan Fruit." Agriculture 11, no. 12 (2021): 1204. http://dx.doi.org/10.3390/agriculture11121204.
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The postharvest quality of rambutan fruits (Nephelium lappaceum Linn.) is mainly influenced by dehydration, which causes browning of the peel and spinterns. This research investigated the effects of some essential oils—from citronella, clove, kaffir lime, and lemongrass—on ‘Rongrien’ rambutan fruit quality during storage at 13 °C. Screening of effective concentrations from 0.01 to 0.16% was conducted for each essential oil. The results showed that, of the essential oil treatments tested, a kaffir lime oil coating of 0.01% could best maintain the quality of fruits, reducing both weight loss and browning of the peel and spinterns. However, essential oil concentrations exceeding 0.04% severely damaged the fruit pericarp, in which scores of spintern browning were higher than those of peel browning. These results suggest that kaffir lime oil can maintain the postharvest quality of ‘Rongrien’ rambutan fruit as a supplement in some edible coatings.
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Yen, Thach Thi Ngoc, Nguyen Van Thanh, Nguyen Minh Thuy, Nguyen Van Phong, and Ngo Van Tai. "Improve the Effectiveness of Inhibiting Pathogenic Fungus and Maintaining the Quality of Rambutan (Nephelium lappaceum L.) Post-Harvest by Indigenous Lactic Bacteria." Horticulturae 10, no. 3 (2024): 298. http://dx.doi.org/10.3390/horticulturae10030298.
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The change in the quality of rambutan (Nephelium lappaceum L.) fruit after harvest is mainly dehydration. Rambutan fruit peel is often dark (brown) and fruit rot due to fungal disease. This study investigated the effects of Lactobacillus bacteria strains [Lactobacillus plantarum CC6 (CC6), Lactobacillus fermentum DC2 (DC2), Lactobacillus fermentum DGMC2 (DGMC2)] with/without supplement combinations [chitosan 0.03% (Chito), alginate 0.03% (SA) and carboxymethyl cellulose 0.5% (CMC)] on the quality of Java rambutan fruit during storage at 13 °C, and included a sample without treatment with bacteria and chemical considered as the control. The results showed that among 16 treatments on rambutan fruits immediately after harvesting, the four treatments that showed the best results were CC6-Chito, DC2-Chito, CC6-CMC and DC2–SA, and DC2-Chito was more effective than the others. However, all four of these treatments supported the preservation of rambutan fruit, reducing both weight loss and browning of the skin and stem, and kept the infection rate at the lowest level. The brightness and peel color values were highest for these treatments.
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Setyawati, Arie, Arifia Kusuma Dewi, Mochammad Fitri Atho’illah, Umie Lestari, and Sri Rahayu Lestari. "THE EFFECT OF RAMBUTAN (Nephelium lappaceum L.) PEEL EXTRACT ON LIPID PEROXIDATION IN LIVER OF OBESE RATS." KnE Life Sciences 2, no. 1 (2015): 326. http://dx.doi.org/10.18502/kls.v2i1.167.
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<p>Lipid accumulation is main cause of obesity which then may cause liver damage due to a high oxidative stress. The oxidative stress in cell can cause lipid peroxidation. This process can be prevented by giving the external antioxidants. Previous study reported that rambutan peel extract reduced mice body weight and several adipogenesis parameters in visceral lipid. The objective of this research was to study the effect of rambutan peel extract on lipid peroxidation and accumulation in the liver of obese rats. The research was arranged in a complete randomized design (CRD). The experimental animals used were male Wistar rat aged 13 weeks weighed 310-340 gram which grouped into 5 groups; each group was given 15mg/kgbw, 30mg/kgbw, 60mg/kgbw, distilled water (C+), or nothing (C-). The extract was given per oral once every two days. The observed parameter are MDA levels and PPAR. expression. At week 12th the animals were dissected, the liver were isolated and tested for Malondialdehyde (MDA) level using TBA and PPARã expression using Immunohistochemistry. Data was analyzed using One Way ANOVA. The results showed that rambutan peel extract in 15 and 30mg/kgbw significantly decrease MDA levels and not significantly down regulate the expression of PPAR..</p><p><strong>Keywords</strong>: rambutan peel extract, lipid peroxidation, Malondialdehyde, PPAR..</p>
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Estrada-Gil, Luis, Juan C. Contreras-Esquivel, Carolina Flores-Gallegos, et al. "Recovery of Bioactive Ellagitannins by Ultrasound/Microwave-Assisted Extraction from Mexican Rambutan Peel (Nephelium lappaceum L.)." Molecules 27, no. 5 (2022): 1592. http://dx.doi.org/10.3390/molecules27051592.
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Rambutan (Nephelium lappaceum L.) is a tropical fruit from Asia which has become the main target of many studies involving polyphenolic analysis. Mexico produces over 8 million tons per year of rambutan, generating a huge amount of agro-industrial waste since only the pulp is used and the peel, which comprises around 45% of the fruit’s weight, is left behind. This waste can later be used in the recovery of polyphenolic fractions. In this work, emerging technologies such as microwave, ultrasound, and the hybridization of both were tested in the extraction of phenolic compounds from Mexican rambutan peel. The results show that the hybrid technology extraction yielded the highest polyphenolic content (176.38 mg GAE/g of dry rambutan peel). The HPLC/MS/ESI analysis revealed three majoritarian compounds: geraniin, corilagin, and ellagic acid. These compounds explain the excellent results for the biological assays, namely antioxidant activity evaluated by the DPPH, ABTS, and LOI (Lipid oxidation inhibition) assays that exhibited great antioxidant capacity with IC50 values of 0.098, 0.335, and 0.034 mg/mL respectively, as well as prebiotic activity demonstrated by a µMax (maximum growth) of 0.203 for Lactobacillus paracasei. Lastly, these compounds have shown no hemolytic activity, opening the door for the elaboration of different products in the food, cosmetic, and pharmaceutical industries.
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Hapsari, Distya Riski, Nindya Atika Indrastuti, and Namira Indah Pratiwi. "Karakteristik Organoleptik Dan Fisikokimia Minuman Fungsional Ekstrak Kulit Buah Mangga Golek dengan Penambahan Ekstrak Jahe Merah Dan Madu." JURNAL AGROINDUSTRI HALAL 10, no. 1 (2024): 69–77. http://dx.doi.org/10.30997/jah.v10i1.7170.
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Mango golek is one of the superior varieties in Indonesia. Utilization of local varieties of mango peel in a fresh form as raw material for functional drinks is not yet available. This study aims to develop ripe mango peel into a ready-to-drink functional beverage product with the addition of red ginger extract and rambutan honey which aims to improve the functional and sensory properties of mango peel extract as an effort to diversify food. The experimental design used a one factor Completely Randomized Design (CRD) with three treatment levels (mango peel extract: red ginger extract: rambutan honey) namely A0 (100%: 0%: 0%), A1 (85%: 10%:5%), and A2 (75%:15%:10%). The analysis included organoleptic tests (sensory and hedonic quality), physical tests (total dissolved solids and pH), and chemical tests (antioxidant activity and total phenol). The decreased levels of mango golek peel extract as well as increase of red ginger and rambutan honey gave a tendency to increased the value of sensory, hedonic quality, total soluble solids, antioxidant activity and total phenol but gave a tendency to decrease the pH value of functional drinks. Selected product of functional drinks based on mango golek peel extract was A2 had a sensory quality of orange color (6.84), uncharacteristic aroma of mango peel (5.50), uncharacteristic taste of mango peel (5.48), non-bitter aftertaste (6.93), turbid appearance (3.35) and uncharacteristic overall of mango peel (5.83) and had a very high level of hedonic preference with a score of 6.18-6.99. The selected formula had a total dissolved solids value of 10.6°Brix; pH 4.83; antioxidant activity 51.07% and total phenol 0.48 mg GAE/g.
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Tuslinah, Lilis, Laras Rizkia Widyastuti, and Mochamad Fathurohman. "Validation of the Use of Anthocyanin as Indicators for Acid-Base Titration." Jurnal Kimia Sains dan Aplikasi 28, no. 2 (2025): 53–61. https://doi.org/10.14710/jksa.28.2.53-61.
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Rambutan peel (Nephelium lappaceum L.) contains secondary metabolites, particularly flavonoids, including anthocyanins. Anthocyanins exhibit color changes in response to variations in pH, making them potential candidates for use as acid-base indicators. This study aims to validate using methanol fraction powder derived from rambutan peel as an acid-base titration indicator by evaluating method validation parameters such as precision, accuracy, and linearity. The fractionation process was conducted using liquid-liquid extraction with n-hexane, water, and methanol as solvents, followed by freeze-drying of the methanol fraction. The methanol fraction powder was analyzed and compared with the conventional phenolphthalein indicator to determine the color transition at the titration endpoint. The results indicated that the methanol fraction exhibited a color change to brown within a pH range of 8–11. Statistical analysis using an independent sample t-test showed no significant difference between the methanol fraction powder and phenolphthalein (significance value > 0.05). Therefore, based on the method validation results, including precision, accuracy, and linearity, the methanol fraction powder of rambutan peel demonstrates potential as a reliable acid-base indicator.
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De La Rosa-Esteban, Karen, Leonardo Sepúlveda, Mónica L. Chávez-González, et al. "Valorization of Mexican Rambutan Peel through the Recovery of Ellagic Acid via Solid-State Fermentation Using a Yeast." Fermentation 9, no. 8 (2023): 723. http://dx.doi.org/10.3390/fermentation9080723.
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Rambutan (Nephelium lappaceum L.) is a tropical fruit that is originally from Southeast Asia and it was introduced to Mexico in the 1960s; the fruit’s peel is known to possess ellagitannins such as ellagic acid which give the peel great biological activity; solid-state fermentation has been used to obtain said compounds and rambutan peel can be used as a fermentation support/substrate; this work aims to obtain, identify and quantify ellagic acid obtained via SSF with a strain of yeast. The water-absorption index and the support’s maximum moisture were determined. To determine the ideal conditions for ellagic acid accumulation, a Box–Behnken 3k experimental design was applied using variables such as temperature, moisture and inoculum. The maximum accumulation time of ellagic acid via solid-state fermentation was determined to be 48 h with ideal conditions of 30 °C, 60% moisture and 1.5 × 107 cells/g using S. cerevisiae, and high-performance liquid chromatography was used to identify ellagic acid, geraniin and corilagin as the most abundant compounds. The maximum recovery of ellagic acid was 458 ± 44.6 mg/g. HPLC/ESI/MS analysis at 48 h fermentation showed biodegradation of geraniin and corilagin due to ellagic acid. Mexican rambutan peel has been demonstrated to be a suitable substrate for SSF.
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Jantapaso, Husanai, and Pimonsri Mittraparp-arthorn. "Phytochemical Composition and Bioactivities of Aqueous Extract of Rambutan (Nephelium lappaceum L. cv. Rong Rian) Peel." Antioxidants 11, no. 5 (2022): 956. http://dx.doi.org/10.3390/antiox11050956.
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Thailand is one of the leading exporting countries of rambutan and rambutan peels are considered as a biological waste. In this study, rambutan (Nephelium lappaceum L. cv. Rong Rian) peel extracts (RPE) obtained by water extraction were analyzed for their phytochemical composition, antibacterial and antioxidant activities, and cytotoxicity. The bioactive compounds in RPE identified by GC-MS were mome inositol (35.99 mg/g), catechol (29.37 mg/g), 5-hydroxymethylfurfural (5.69 mg/g), 2-pentenal, (E)-(5.22 mg/g), acetic acid (3.69 mg/g), 1,2,3-propanetriol (3.67 mg/g), 2-furan-carboxaldehyde (2.66 mg/g), and other compounds. FT-IR analysis confirmed the presence of alcohol and phenol in the extract. Antibacterial activities of RPE against food pathogenic and spoilage bacteria showed that RPE could inhibited Bacillus subtilis, B. cereus, Staphylococcus aureus, Vibrio cholerae, V. parahaemolyticus, Pseudomonas aeruginosa, and P. fluorescens, with MIC values ranging between 1024 and 8192 µg/mL. The extract also showed antioxidant properties, as determined by DPPH and ABTS assays. The cytotoxicity analysis after 72 h of treatment showed the IC50 values at 194.97 ± 4.87, 205.92 ± 2.55, and 94.11 ± 1.33 µg/mL for L929, Vero, and MCF-7 cell lines, respectively. Therefore, this study provided a basis of knowledge of rambutan peels as an excellent source of natural bioactive compounds for various applications.
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Hernández-Hernández, Christian, Luis E. Estrada-Gil, Sonia A. Lozano-Sepúlveda, et al. "Antiviral Activity of Rambutan Peel Polyphenols Obtained Using Green Extraction Technology and Solvents." Sustainable Chemistry 6, no. 2 (2025): 14. https://doi.org/10.3390/suschem6020014.
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Rambutan peel is a great source of bioactive compounds, the same that, over the years, has been extracted using conventional technologies which have been proven to be harmful to the environment and potentially toxic to human beings. This study aimed to extract the same compounds using a hybridization of ultrasound/microwave extraction. The results were promising, as a total of 378.48 ± 9.19 mg/g of polyphenols were recovered from this procedure, and the most important molecules (geraniin, corilagin, and ellagic acid) were identified, giving this much more relevance. Furthermore, treatment with rambutan peel extract recovered with green technologies significantly reduced cell viability in HCV-infected liver cells. Notably, higher concentrations (4000 and 5000 ppm) led to more pronounced cell death in huh7 cells. The treatment also led to a significant reduction in viral protein and RNA expression in HCV-infected cells. These findings suggest that rambutan peel extract obtained from the combination of ultrasound and microwave extraction, particularly the ellagitannins present, have potential antiviral properties. Further research is needed to explore its mechanism of action and its potential as a therapeutic agent for Hepatitis C.
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Boyano-Orozco, Luis, Tzayhrí Gallardo-Velázquez, Ofelia Gabriela Meza-Márquez, and Guillermo Osorio-Revilla. "Microencapsulation of Rambutan Peel Extract by Spray Drying." Foods 9, no. 7 (2020): 899. http://dx.doi.org/10.3390/foods9070899.
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Microencapsulation of bioactive compounds (BC) from rambutan peel by spray drying using DE10 maltodextrin as encapsulating agent was performed. The optimal conditions for the ethanolic extraction of BC were 60 °C, with a time of 1 h, 55% aqueous ethanol and three extraction cycles. The best spray drying encapsulating conditions for BC and antioxidant capacity (AC) were: inlet temperature 160 °C, outlet temperature 80 °C, and 10% encapsulating agent concentration in the feeding solution (core:encapsulating agent ratio of 1:4). With these conditions, retention and encapsulation efficiencies obtained were higher than 85%, the water activity value, moisture content and Hausner Index were of 0.25 ± 0.01, 3.95 ± 0.10%, and 1.42 ± 0.00, respectively. The optimized powder presented good solubility and morphological properties, showing microcapsules without ruptures. Based on these results, microencapsulation by spray drying is a viable technique which protects BC of rambutan peel, facilitating its application in the food, pharmaceutical, and cosmetic industries.
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Nindhea Ferliza, Yoan, Shinta Katarina, Aldinol Dody Wibowo, Nurlaili Farida Muhajir, and Desto Arisandi. "Efektivitas Ekstrak Kulit Rambutan (Nephelium lappaceum) Terhadap Penurunan Kadar Low Density Lipoprotein." Jurnal Medisains Kesehatan 5, no. 2 (2024): 87–94. https://doi.org/10.59963/jmk.v5i2.333.
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Dyslipidemia is a lipid component disorder characterized by increased levels of total cholesterol, Low-Density Lipoprotein (LDL), and triglycerides, as well as decreased levels of High-Density Lipoprotein (HDL). Rambutan is known to contain flavonoids, tannins, saponins, quercetin and alkaloids, which have the ability to lower blood cholesterol levels. The aim of the research was to determine the effect of giving rambutan peel extract to rats on reducing low density lipoprotein (LDL) cholesterol levels. This is a true experiment research with a pretest-posttest and control group design approach. The research samples were 15 male rats aged 8-10 weeks and weighing 150-250 grams. The dose of rambutan fruit peel was given at 180 mg/kgBW/day for 14 days. LDL cholesterol levels were measured by a spectrophotometer using an enzymatic method. Data analysis used the paired t-test on STATA for Windows software version 12.0 with a confidence level of 95%. Average LDL cholesterol levels in rats before and after administration were 53 and 35 mg/dl, respectively. Giving rambutan skin extract at a dose of 180 mg/dl can reduce LDL cholesterol levels significantly (p < 0.001) by 18 mg/dl (33.9%) in rats
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Mukaromah, Ana Hidayati, Dea Galuh Cahyaningrum, Desty Ratna Putri, et al. "Antibacteria Activity Peel and Seed Extracts of Rambutan (Nephelium lappaceum L.) Against MDR Bacteria Causing Urinary Tract Infections." Biosaintifika: Journal of Biology & Biology Education 15, no. 3 (2023): 432–40. http://dx.doi.org/10.15294/biosaintifika.v15i3.39568.
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Multidrug-resistant (MDR) - Escherichia coli (E. coli) and Klebsiella pneumoniae (K. pneumoniae) are the main causes and have become serious problems in urinary tract infections, so antibacterial agents derived from biological materials are needed. ESBL-E. coli and ESBL-K. pneumoniae bacteria are resistant to extracts from rambutan peels and seeds, but there is no knowledge of the use of different solvents, such as n-hexane, chloroform, or ethanol. The objective of this research was to assess the antibacterial activity of rambutan peels and seed extracts (n-hexane, chloroform, and ethanol) against MDR bacteria that cause urinary tract infections (UTI). The Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) values for antibacterial activity were calculated using agar well diffusion and dilution procedures. The results demonstrated that the ethanol extract of rambutan peels had inhibitory zones against MDR K. pneumoniae and E. coli that varied from 9.00 to 14.13 mm. 15.625 mg/mL For MDR E. coli and 3.90 mg/mL for MDR K. pneumoniae, respectively, the MIC value was determined. The MBC value was 62.50 mg/mL for MDR K. pneumoniae and 31.25 mg/mL for MDR E. coli. Conclusion: Of the six rambutan peel and seed extracts, the ethanol extract has greater potential as an antibacterial agent. It is advised that more in-vivo studies be done to understand how the antibacterial activity operates.The benefits of research for the science are providing alternative solutions to antibiotic resistance, to further advancing the field of antimicrobial research, and reducing the risk of bacterial infections.
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Suci Nasution, Embun, Muhammad Fauzan Lubis, and Adika Fajar Putra. "Increasing Community Income Through Utilization of Rambutan and Lemon Skin as Antioxidant Herbal Tea in Binjai, North Sumatera." Jukeshum: Jurnal Pengabdian Masyarakat 5, no. 1 (2025): 203–11. https://doi.org/10.51771/jukeshum.v5i1.1148.
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Rambung Dalam is one of the sub-disctrict on Jalan Padang, South Binjai, Binjai city, North Sumatera, Indonesia. Rambung Dalam sub-district faces a specific issue, which is the suboptimal utilization of the potential natural resource (rambutan peel waste), where rambutan itself is one of the region's distinctive natural resources. This ommunity aims to provide education about branding of pharmacist, utilization of rambutan and lemon peel as antioxidant tea and workshops on making it, as well as marketing and business plans for a product. The community service was conducted on August 8, 2024 using a modified Community Based Interactive Approach (CBIA) method. This activity was divided into three stages, pre-implementation, implementation, and monitoring and evaluation stages. The formula of antioxidant herbal tea using dried rambutan and lemon peel introduced to the community had been evaluated based on organoleptic tests, antioxidant activity tests, and yeast and mold count tests. The organoleptic test results with 1:1 formula yielded a tea infusion with a brownish-orange color, slightly bitter taste, and strong herbal aroma. The antioxidant test using 2,2- azinobis-3-Ethylbenzothiazoline-6-Sulfonic Acid with three repetitions showed an average IC50 value of 147.63 ppm, categorized as moderate antioxidants. The yeast and mold count test results showed 227 colonies/gram of tea (fulfill the requirement). The participants include community representatives, farmers, housewives, Integrated Healthcare Center staff, youth organizations, and community members actively involved during the activities. The community service using the CBA method can increase the knowledge and skills of participants by 72%, determined from pre-test and post-test results
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Faramayuda, Fahrauk, Elfahmi Elfahmi, and Weni Widy Astuti. "ANALYSIS OF SECONDARY METABOLITES OF CALLUS OF RAMBUTAN Nephelium lappaceum L." Agric 33, no. 1 (2021): 13–22. http://dx.doi.org/10.24246/agric.2021.v33.i1.p13-22.
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Rambutan plant (Nephelium lappaceum L.) is a member of the Sapindaceae family. The rambutan plant is one of the natural ingredients that can be developed as traditional medicine. Rambutan peel has the potential for good antioxidant and anticancer activity. Rambutan fruit does not grow every time it needs efforts to produce the active substance in rambutan, using plant tissue culture techniques. The use of the correct variety of mediums and hormones at the right concentration is the key to thriving tissue culture. Explants derived from rambutan leaves were planted precisely on solid media Murashige and Skoog (MS) and WoddyPlant Medium (WPM) containing Indole-3-Butyric Acid (IBA) and Kinetin. After seven days, the callus was subcultured, then after 35 days, the subculture callus was collected and dried. Dry callus and rambutan leaves (Wild type) were macerated with n-hexane, ethyl acetate, and ethanol. The concentrated extract was then applied to a GF 254 silica gel plate with the mobile phase Toluene-Acetone (7: 3) and n-hexane-EthylAsetate (3: 7). The results showed that the concentration of IBA 2 ppm and kinetin three ppm was the best combination because it produced callus. TLC results of rambutan leave with plant tissue culture containing flavonoids and triterpenoids. This study provides new information regarding the induction of rambutan callus and can become the basis for producing active metabolites in rambutan with cell suspension culture development.
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Mandalurang, Fitriani, Max Revolta Jhon Runtuwene, and Edi Suryanto. "Aktivitas Peluruhan Batu Ginjal oleh Fraksi Pelarut dari Kulit Buah Rambutan (Nephelium lappaceum L.)." CHEMISTRY PROGRESS 17, no. 2 (2024): 123–29. https://doi.org/10.35799/cp.17.2.2024.55873.
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ABSTRAK Penelitian ini bertujuan untuk menentukan kandungan fenolik dan tanin terkondensasi dari kulit buah rambutan dan untuk menentukan kemampuan fraksi kulit buah rambutan untuk meluruhkan kalsium batu ginjal. Ekstraksi dikerjakan dengan cara sokletasi dan kemudian ekstrak diuapkan untuk kemudian dipartisi. Pengujian kandungan fenolik dan tanin terkondensasi dilakukan menggunakan spektrofotometer dengan pereaksi-pereaksi Folin Ciocalteu dan Na2CO3. Pengujian terhadap batu ginjal, yang mencakup pembuatan kalsium batu ginjal dan penentuan kadar kalsium terluruh dikerjakan dengan menggunakan spektrofotometer UV-Vis. Hasil penelitian menunjukkan kandungan fenolik dalam fraksi etil asetat (FEA) sebesar 2,253 µg/mL, dalam fraksi akuades (FA) sebesar 2,223 µg/mL, dan dalam fraksi N-heksan (FNH) sebesar 2,219 µg/mL. Kandungan tanin terkondensasi dalam FEA sebesar 48,952 mg/kg, dalam FNH sebesar 34,507 mg/kg, dan dalam FA sebesar 27,682 mg/kg. Pengujian peluruhan kalsium batu ginjal menunjukkan kadar kalsium terlarut dalam FEA sebesar 9,22 µg/mL, dalam FA sebesar 4,99 µg/mL, dan dalam FNH sebesar 4,12 µg/mL yang mengimplikasikan kemampuan kulit buat rambutan untuk meluruhkan kalsium batu ginjal. ABSTRACT This research aimed to determine the phenolic and condensed tannin content of rambutan fruit peel and to assess the ability of rambutan fruit peel fractions to dissolve calcium kidney stones. Extraction was carried out using a Soxhlet apparatus, followed by evaporation of the extract and subsequent partitioning. The phenolic and condensed tannin content were determined using a spectrophotometer with Folin Ciocalteu and Na2CO3 reagents. The kidney stone testing, which involved the creation of calcium kidney stones and the determination of dissolved calcium content, was conducted using a UV-Vis spectrophotometer. The results showed that the phenolic content in the ethyl acetate fraction (FEA) was 2.253 µg/mL, in the aqueous fraction (FA) was 2.223 µg/mL, and in the n-hexane fraction (FNH) was 2.219 µg/mL. The condensed tannin content in FEA was 48.952 mg/kg, in FNH was 34.507 mg/kg, and in FA was 27.682 mg/kg. The calcium kidney stone dissolution test showed that the dissolved calcium content in FEA was 9.22 µg/mL, in FA was 4.99 µg/mL, and in FNH was 4.12 µg/mL, which implies the ability of rambutan fruit peel to dissolve calcium kidney stones.
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Liu, Wenbo, Xiaowen Yu, Hanhan Wang, Wanyi Liao, Cong Yong, and Wei Liao. "Waste Rambutan-Derived Porous Carbon Materials Applied to Supercapacitors." E3S Web of Conferences 580 (2024): 01003. http://dx.doi.org/10.1051/e3sconf/202458001003.
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The supercapacitor, as a novel energy storage device, possesses the advantages of rapid charging and discharging, extended cycle life, high power density, low energy density, excellent voltage resistance, large capacity, and more. Biomass serves as an ideal electrode material for supercapacitors due to its high carbon content, cost-effectiveness, and environmental friendliness. In this study, waste rambutan peel is utilized as the raw material and subjected to KOH activation following high-temperature pyrolysis to fabricate porous carbon materials with well-ordered pore size distribution. The rambutan peel electrode material exhibits a mass-specific capacitance of 285 F g-1 (at 1 A g-1 current density) and retains 105% after 5000 cycles of charge and discharge. This provides a direction for the reuse of biomass materials.
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Djajanti, Agust Dwi Djajanti, and Ade Shafira. "AKTIVITAS SIRUP EKSTRAK KULIT BUAH RAMBUTAN (Nephelium lappaceum L.) TERHADAP KADAR KOLESTEROL TOTAL DARAH MENCIT (Mus musculus)." Jurnal Kesehatan Yamasi Makassar 8, no. 1 (2024): 35–43. http://dx.doi.org/10.59060/jurkes.v8i1.317.
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This study aims to determine the “Activity of syrup ekstrak from Rambutan Peel (Nephelium lappaceum L.) on reducing total cholesterol levels in the blood of mice (Mus musculus).” This type of research using the pre and post test method. Induction of hypercholesterolemia was carried out by giving high-fat feed, namely duck egg yolk and butter and PTU inducers which were given every day at relatively the same time for 14 days by oral method. On the 15th day the mice were fasted but still given to drink for the next 3 hours. Cholesterol levels were measured after induction for 14 days (induction cholesterol levels). The mice test animals used were 6 mice (Mus musculus) which were divided into 2 treatment groups. On day 15, groups 1 was treated with gemfibrozil 300 mg as a positive control and group 2 was treated with syrup of rambutan peel extract. After 30 minutes, the mice’s cholesterol levels were meansured. On day 16 they were given the same treatment on day 15 and cholesterol levels were menasured 30 minutes after administration. From the results of the study it was concluded that administration of syrup of rambutan peel extract (Naphaleum lappaeum L.) with a level of 250 mg/ml can reduce total cholesterol levels in the blood of mice with an average decrease of 7% and 11%.
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Venturini, M. E., D. Gimeno, K. Franco, D. Redondo, and R. Oria. "Rambutan peel as a source of food antioxidant extracts." Acta Horticulturae, no. 1194 (March 2018): 971–78. http://dx.doi.org/10.17660/actahortic.2018.1194.138.
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Rohman, Abdul, Sugeng Riyanto, Mistriyani ., Shuhaira ., and Agung Endro Nugr. "Antiradical Activities of Rambutan Peel: Study from Two Cultivars." Research Journal of Phytochemistry 11, no. 1 (2016): 42–47. http://dx.doi.org/10.3923/rjphyto.2017.42.47.
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Diaz Rojas, Mariana, Aldo Alvarez-Risco, Alejandra Eugenia Loáiciga González, et al. "Comparison of the Antioxidant Power of Extracts of the Red vs. Yellow Nephelium lappaceum Variety." Sustainability 15, no. 6 (2023): 5188. http://dx.doi.org/10.3390/su15065188.
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Nephelium lappaceum L., also known as “Chinese mamon” (mamon chino) or “rambutan”, is an exotic fruit of tropical climate with a sweet flavor and aroma, which can be found in the territory of Costa Rica in the Brunca and Huetar Atlántica regions. For the comparison of antioxidants, different electronic tests were carried out with the red peel and the yellow peel of Nephelium lappaceum, taking ascorbic acid as a base. In addition, Nephelium lappaceum peels, due to their antioxidant properties, allowed the identification of the active components and their antioxidant activity by thin layer chromatography and DPPH tests. The results of these tests show the presence of flavonoids, coumarins, glycosides, and carotenoids, which are the primary metabolites of Nephelium lappaceum peels.
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Yuvakkumar, R., and S. I. Hong. "Green Synthesis of Spinel Magnetite Iron Oxide Nanoparticles." Advanced Materials Research 1051 (October 2014): 39–42. http://dx.doi.org/10.4028/www.scientific.net/amr.1051.39.
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Spinel magnetite Fe3O4nanoparticles were synthesized using rambutan peel waste extract as a green ligation and chelating agent. The green synthesized nanoparticles were characterized employing X-ray diffraction (XRD), Raman spectroscopy, FTIR spectroscopy and transmission electron microscopy (TEM) studies. The XRD study revealed spinel phase hda a magnetite structure. The formation of iron oxide nanoparticles using rambutan extract was confirmed employing IR studies. XRD, FTIR and Raman spectrum analyses all supports the synthesis of Fe3O4nanoparticles. The TEM revealed the spinel morphology of the biosynthesized nanoparticles with 200 nm.
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Setiawan, I. Ketut Ardi, Mery Napitupulu, and Daud K. Walanda. "Biocharcoal dari Kulit Rambutan (Nephelium lappaceum L.) sebagai Adsorben Zink dan Tembaga." Jurnal Akademika Kimia 7, no. 4 (2018): 193. http://dx.doi.org/10.22487/j24775185.2018.v7.i4.11944.
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Rambutan peel is one source of biocharcoal production to adsorb metal ions because of the potential of cellulose content. This study aimed to describe the characteristics of biocharcoal from rambutan peel as well as to determine biocharcoal adsorption to zinc and copper based on the variation of biocharcoal weight and metal ions concentrations. The method used in this study was a laboratory experiment, and metals were analyzed using spectrophotometer spectroDirect. The results showed the moisture and ash levels of the biocharcoal were 0.4% and 5.4%, respectively. The optimum weight of biocharcoal to adsorb Zn and Cu ions was 40 mg with their percentage adsorption of 98.81% and 98.94%, respectively. The optimum concentration adsorption of biocharcoal to Zn ions was 40 ppm with the percentage adsorption of 98.32%, while for the Cu ions was 60 ppm with the percentage adsorption of 98.25%.
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Florenly, Florenly, Cindy D. Wijaya, Kelvin Kelvin, Nguyen P. G. Bao, and Pham C. T. Dung. "Antibacterial Efficacy of Nanoparticles of Rambutan Peel Extracts (Nephelium lappaceum L.) compared to Microparticles against Oral Bacteria." e-GiGi 10, no. 1 (2022): 95. http://dx.doi.org/10.35790/eg.v10i1.39001.
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Abstract: Oral biofilm containing microorganisms is responsible for various oral infections and inflammatory diseases. Bioactive compounds found in rambutan peel extracts (Nephelium lappaceum L) has antibacterial properties. Nanoparticle sizes were known to have the greater capability as an a antimicrobial. This study aimed to compare the efficacy of rambutan peel extracts (RPEs) in micro-particles with nanoparticles against oral bacteria, i.e. Streptococcus mutans and Staphylococcus aureus. This was a laboratory experimental study with a post-test-only design conducted by using RPEs in microparticles (62.5 mg/mL and 250 mg/mL) and nanoparticles (26.5 mg/mL). The particle sizes were measured; the active compound screening was carried out with gas chromatography-mass spectrometry (GC–MS); and the antibacterial activities were tested with the disc diffusion method. The particle size distribution for RPEs with microparticles was measured at 2489 nm, whereas the nanoparticle at 7.491 nm. The GC-MS results demonstrated that both microparticles and nanoparticle RPEs contained oleic acid, hexadecanoic acid, and decanoic acid. A higher percentage of oleic acid was found in nanoparticles of RPEs. There was a significant difference between microparticles of RPEs of 62.5 mg/mL (12.83±1.532) and nanoparticles (16.25±1.529). This study demonstrated that inhibitory power increased along with the elevation of RPEs’ concentration as the number of chemi-cal components intensified. The ANOVA and post-hoc Tukey HSD test showed significant differences in the effectiveness of RPEs in nanoparticles groups compared to microparticles 62.5 mg/ml against S. mutans (p<0.05). and S. aureus (p<0.05). In conclusion, RPEs were more effective in inhibiting Staphylococcus aureus than Streptococcus mutans.Keywords: nanoparticles; rambutan peels; Nephelium lappaceum L; antibacterial activity; Streptococcus mutans; Staphylococcus aureus
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Riyanto, S., and A. Rohman. "Antioxidant activities of Rambutan (Nephelium lappaceum L) peel in vitro." Food Research 2, no. 1 (2017): 119–23. http://dx.doi.org/10.26656/fr.2017.2(1).150.
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Zuhri, Moh Sayful, Sudibya, Eksa Rusdiyana, et al. "The Workshop on Waste Treatment of Rambutan Peel and Rambutan Seeds by KKN Kebangsaan UNS in Mawar Mekar Village, Kapuas, Central Kalimantan." KOMUNITA: Jurnal Pengabdian dan Pemberdayaan Masyarakat 1, no. 2 (2022): 81–86. http://dx.doi.org/10.60004/komunita.v1i2.25.
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Mawar Mekar Village is one of the villages located in Pulau Petak District, Kapuas Regency where agriculture is the main sector of the village economy. The main agricultural products of this village are rice, rambutan, chili, and other commodities. With a land area of 20 hectares, rambutan commodity can potentially increase the economy of rural communities. However, the knowledge of the villagers is limited to the use of rambutan fruit, only the flesh of the fruit, thus causing waste in the form of seeds and skin. Therefore, there is a need for reprocessing measures to reduce the waste. Community service activities are carried out through a Real Work Lecture (KKN) approach by Sebelas Maret University students who are members of the National Community Service Program. Departing from these problems, KKN students innovate to make products from rambutan skin and seeds that have high economic value. The community service program is packaged through real work lecture activities and is expected to provide benefits in the program. Through this program, he hopes to be able to provide the role of academics in devoting themselves to the community, as well as opening up opportunities for Village MSMEs that will help the village economy.
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Ika Ayu Mentari and Rahmatang. "FORMULASI DAN UJI STABILITAS SEDIAAN KOSMETIK PERONA PIPI (BLUSH ON) DARI EKSTRAK KULIT BUAH RAMBUTAN ( Nephelium lappaceum L) SEBAGAI COLORING AGENT." Jurnal Ilmiah Manuntung 10, no. 2 (2024): 168–77. https://doi.org/10.51352/jim.v10i2.885.
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Blush On is one type of cosmetic that produces color on the cheeks, there are two types of dyes commonly used in cosmetics, namely natural dyes derived from plants and synthetic dyes derived from a mixture of two or more chemical compounds. Plants that are often used to form natural dyes are rambutan fruit skin which has anthocyanin content that can provide color pigments. This study aims to determine the extract of rambutan fruit skin can be formulated into a blush on preparation and to determine the stability of the blush on preparation. The research method was carried out experimentally including the extraction of rambutan fruit skin by the maceration method using 96% ethanol, making blush on preparations with three different concentrations including 10%, 20%, 30%. Checking the physical quality of blush on includes organoleptic testing, stability, preference, pH, irritation, spreadability and homogeneity. The results of the study showed that blush on preparations with a concentration of 10% produced a white color, a concentration of 20% was brown and a concentration of 30% produced a reddish brown color. This happens because there are different concentration levels of each formulation of active substances from rambutan fruit skin extract. The stability of the preparation after 3 weeks of storage showed stable results. The conclusion of this study is that rambutan peel extract can be used as a coloring agent in blush on preparations.
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Widowati, Wahyu, Maesaroh Maesaroh, Nurul Fauziah, Pande Putu Erawijantari, and Ferry Sandra. "Free Radical Scavenging and Alpha/Beta-glucosidases Inhibitory Activities of Rambutan (Nephelium lappaceum L.) Peel Extract." Indonesian Biomedical Journal 7, no. 3 (2015): 157. http://dx.doi.org/10.18585/inabj.v7i3.180.
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BACKGROUND: Diabetes mellitus (DM) is associated with oxidative reaction and hyperglycemic condition. Human body has an antioxidant defense system toward free radical, but overproduction of free radical causing imbalance condition between the free radical and the antioxidant defense in the body that lead to several diseases, including DM. Glucosidase is an enzyme that hydrolize carbohydrates causing increase of blood glucose level, so by inhibiting this enzyme blood glucose level in plasma could be effectively decreased. Rambutan (Nephelium lappaceum L.) peel has been reported to have many potential roles, such as antioxidant and anti-glycemia. Therefore our current study was conducted to evaluate possible effectivity of Rambutan peel to scavenge free radical and to inhibit α- and β-glucosidases. METHODS:Rambutan peel extraction (RPE) was performed based on maceration method. Geraniin was used as control. For antioxidant study, 2,2-diphenyl-1- picrylhydrazyl (DPPH) free radical scavenging test was performed. For glucosidase inhibitory activity study, α- and β-glucosidases inhibitory activity tests were performed. Results were analyzed for median of Inhibitory Concentration (IC50).RESULTS: The scavenging activity of RPE was comparable with Geraniin. Meanwhile, the α-glucosidase inhibitory activity of RPE was higher than the one of Geraniin. The α-glucosidase-inhibitory-activity IC50 of RPE and Geraniin were 0.106±0.080 μg/ml and 16.12±0.29 μg/ml, respectively. The β-glucosidase inhibitory activity of RPE was also higher than the one of Geraniin. The β-glucosidase-inhibitory-activity IC50 of RPE and Geraniin were 7.02±0.99 μg/ml and 19.81±0.66 μg/ml, respectively.CONCLUSION: Since RPE showed comparable free radical scavenging activity with Geraniin and higher α- and β-glucosidases inhibitory activities than Geraniin, RPE could be suggested as a promising antioxidant and antiglycemic agent. KEYWORDS: Nephelium lappaceum L., rambutan, hypoglycemic, antioxidant, free radical, diabetes mellitus, glucosidase, DPPH
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Harlin, Farah Ibtisamah, and Dezi Handayani. "Cendawan dari Cairan Ecoenzyme dan Mama Enzyme Berbahan Organik Kulit Jeruk dan Kulit Rambutan." MASALIQ 4, no. 1 (2024): 379–91. http://dx.doi.org/10.58578/masaliq.v4i1.2641.
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Ecoenzyme is a fermented mixture of organic waste, sugar and water in a ratio of 3:1:10. The results of fermentation can be liquid ecoenzyme, mama enzyme, and pitera. During the ecoenzyme fermentation process, microbes found in organic materials play a role in breaking down organic compounds to produce various useful metabolite compounds. The microbes found in ecoenzyme are generally Lactic Acid Bacteria (LAB) and fungi, but there is no literature that explains the types of fungi found in ecoenzyme liquid and mama enzyme from a mixture of several types of fruit peel. So it is necessary to isolate and identify the fungus from ecoenzyme and mama enzyme liquid with a mixture of orange peel and rambutan. This research is a descriptive study, with stages of equipment sterilization, making Potato Dextrose Agar (PDA) medium, making and taking ecoenzyme samples, isolating ecoenzyme samples, purifying fungi, macroscopic and microscopic observations, and identifying fungi. Data on the number of isolates and types of fungi isolated from ecoenzyme samples were analyzed descriptively and displayed in the form of tables and figures. The fungus that was successfully isolated from ecoenzyme and mama enzyme liquid with a mixture of orange peel and rambutan peel was 5 isolates. Two isolates belong to the mold group which refers to the genus Trichoderma and the genus Paecilomyces, three isolates belong to the yeast group, but have not been identified to the genus level.
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Ampapon, Thiwakorn, and Metha Wanapat. "Dietary rambutan peel powder as a rumen modifier in beef cattle." Asian-Australasian Journal of Animal Sciences 33, no. 5 (2020): 763–69. http://dx.doi.org/10.5713/ajas.19.0342.
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Objective: The experiment was conducted to study the effect of rambutan (Nephelium lappaceum) fruit peel powder (RP) on feed consumption, digestibility of nutrients, ruminal fermentation dynamics and microbial population in Thai breed cattle.Methods: Four, 2-year old (250±15 kg) beef bull crossbreds (75% Brahman×25% local breed) were allotted to experimental treatments using a 4×4 Latin square design. Four dietary supplementation treatments were imposed; non-supplementation (control, T1); supplementation of RP fed at 2% of dry matter intake (DMI) (low, T2); supplementation of RP fed at 4% of DMI (medium, T3) and supplementation of RP fed at 6% of DMI (high, T4). All cattle were given a concentrate supplement at 1% of body weight while Napier grass was provided as a free choice.Results: The findings revealed that RP supplementation did not negatively affect (p>0.05) DMI of Napier grass, while RP intake and total DMI were the greatest in the RP supplementation at 4% and 6% DMI. Nevertheless, the nutrients (dry matter, organic matter, crude protein, neutral detergent fiber, and acid detergent fiber) digestibilities were not changed in the RP supplementation groups. Rumen fermentation parameters especially those of total volatile fatty acids, acetate and butyrate were not significantly changed. However, the propionate concentration was remarkably increased (p<0.05) in the RP supplementation. Notably, the ratio of acetate to propionate, the number of protozoa, as well as the methane estimation were significantly reduced in the RP supplemented groups (4% and 6% of DMI), while the counts of bacteria was not altered.Conclusion: Supplementation of RP (4% of DMI) improved rumen propionate production, reduced protozoal population and methane estimation (p<0.05) without a negative effect on feed consumption and nutrients total tract digestibilities in beef cattle. Using dietary rambutan fruit peel powder has potential promise as a rumen regulator.