Gotowe bibliografie tematyczne / DPPH assay

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Gotowa bibliografia na temat „DPPH assay”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "DPPH assay"

Sharma, Om P., and Tej K. Bhat. "DPPH antioxidant assay revisited." Food Chemistry 113, no. 4 (2009): 1202–5. http://dx.doi.org/10.1016/j.foodchem.2008.08.008.

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Gulcin, İlhami, and Saleh H. Alwasel. "DPPH Radical Scavenging Assay." Processes 11, no. 8 (2023): 2248. http://dx.doi.org/10.3390/pr11082248.

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Today, there is an increasing interest in antioxidants, especially to prevent the known harmful effects of free radicals in human metabolism and their deterioration during processing and storage of fatty foods. In both cases, natural-source antioxidants are preferred over synthetic antioxidants. So, there has been a parallel increase in the use of assays to estimate antioxidant efficacy in human metabolism and food systems. Today, there are many bioanalytical methods that measure the antioxidant effect. Of these, the 1,1-diphenyl-2-picrylhydrazil (DPPH) removing assay is the most putative, pop

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Platzer, Melanie, Sandra Kiese, Thomas Herfellner, Ute Schweiggert-Weisz, Oliver Miesbauer, and Peter Eisner. "Common Trends and Differences in Antioxidant Activity Analysis of Phenolic Substances Using Single Electron Transfer Based Assays." Molecules 26, no. 5 (2021): 1244. http://dx.doi.org/10.3390/molecules26051244.

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Numerous assays were developed to measure the antioxidant activity, but each has limitations and the results obtained by different methods are not always comparable. Popular examples are the DPPH and ABTS assay. Our aim was to study similarities and differences of these two assay regarding the measured antioxidant potentials of 24 phenolic compounds using the same measurement and evaluation methods. This should allow conclusions to be drawn as to whether one of the assays is more suitable for measuring specific subgroups like phenolic acids, flavonols, flavanones, dihydrochalcones or flavanols

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Jafri, Syed Anis Ali, Zafar Mahmood Khalid, Muhammad Zakryya Khan, and NaqeebUllah Jogezai. "Evaluation of phytochemical and antioxidant potential of various extracts from traditionally used medicinal plants of Pakistan." Open Chemistry 20, no. 1 (2022): 1337–56. http://dx.doi.org/10.1515/chem-2022-0242.

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Abstract The antioxidant potential of various extracts was evaluated using different antioxidant assays such as 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay, ferric reducing antioxidant power (FRAP) assay, and 2,2-azinobis-ethylbenzothiozoline-6-sulphonic acid (ABTS) using UV spectrophotometer. The highest absorbance was observed in ethanolic extracts (EEs) of Euphrasia stricta 71.92 ± 1.22%, 65.77 ± 1.38%, and 67.88 ± 0.74%, followed by methanolic extracts (MEs) 70.14 ± 0.82%, 64.84 ± 0.74%, and 65.48 ± 1.40% for DPPH assay (517 nm), FRAP assay (700 nm), and ABTS assay (734 nm), respectively. T

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Tayade, Sunil, Kamlakar More, and Prashant Gawande. "Antioxidative properties of Mucuna nivea (Roxb.) DC by DPPH Assay." SSR Institute of International Journal of Life Sciences 6, no. 6 (2020): 2687–93. http://dx.doi.org/10.21276/ssr-iijls.2020.6.6.3.

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Yamauchi, Moeka, Yukino Kitamura, Haruka Nagano, Junya Kawatsu, and Hiroaki Gotoh. "DPPH Measurements and Structure—Activity Relationship Studies on the Antioxidant Capacity of Phenols." Antioxidants 13, no. 3 (2024): 309. http://dx.doi.org/10.3390/antiox13030309.

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The consumption of foods that are high in antioxidant capacity is believed to contribute to good health. Moreover, the addition of highly antioxidant compounds to foods is believed to prevent food deterioration. Among the known antioxidants in food, phenols have been identified as the primary antioxidants. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay is a simple, inexpensive, and rapid method widely used to evaluate the antioxidant capacity. Although the results of the DPPH assay depend on conditions such as the reaction time and concentration, the experimental conditions have not been stand

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Frezzini, Maria Agostina, Federica Castellani, Nayma De Francesco, Martina Ristorini, and Silvia Canepari. "Application of DPPH Assay for Assessment of Particulate Matter Reducing Properties." Atmosphere 10, no. 12 (2019): 816. http://dx.doi.org/10.3390/atmos10120816.

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Different acellular assays were developed to measure particulate matter’s (PM) oxidative potential (OP), a metric used to predict the ability of PM in generating oxidative stress in living organisms. However, there are still fundamental open issues regarding the complex redox equilibria among the involved species which could include reducing compounds. The aim of this study was the pilot application of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay to PM in order to evaluate the presence of reducing species. The assay, commonly applied to biological matrices, was adapted to PM and showed good

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Alam, M. Ashraful, Abdul Ghani, Nusrat Subhan, et al. "Antioxidant and Membrane Stabilizing Properties of the Flowering Tops of Anthocephalus Cadamba." Natural Product Communications 3, no. 1 (2008): 1934578X0800300. http://dx.doi.org/10.1177/1934578x0800300114.

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The hydroethanolic extract of Anthocephalus cadamba displayed remarkable antioxidative potential in the 1,1-diphenyl-2-picrylhydrazyl (DPPH), the hydrogen peroxide, the nitric oxide scavenging, the reducing power, the total antioxidant capacity, the lipid peroxidation inhibition (thiobarbituric acid-reactive substances production), and the RBC membrane stabilization assays. While in the DPPH assay the IC50 value of the extract was 146.5 μg/mL, it was 24.8 μg/mL in the nitric oxide scavenging assay.

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Zahra, N., MK Saeed, S. Nawaz, and E. Gulzar. "Aloe vera cookies preparation, nutritional aspects, DPPH assay and physicochemical assay." Bangladesh Journal of Scientific and Industrial Research 57, no. 2 (2022): 117–22. http://dx.doi.org/10.3329/bjsir.v57i2.60408.

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Aloe vera has been widely used for various therapeutic purposes over the millennia. It is becoming increasingly popular due to its antiviral and antibacterial qualities. For many years, aloe vera has been employed in biomedical research. It's a fantastic way to boost the nutritional value of any food product. This research aims to expand on the nutritional value of cookies by including Aloe vera gel. It would focus on the substance's biological and pharmacological characteristics. The nutritional quality of aloe vera cookies was evaluated after being manufactured with all-natural, chemical-fre

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Leki, Karol Giovani Battista, Yahya Febrianto, and Yithro Serang. "Evaluation of Antioxidant Activity in Solanum Ferox (Through DPPH and FRAP Assays)." JURNAL INFO KESEHATAN 23, no. 2 (2025): 309–17. https://doi.org/10.31965/infokes.vol23.iss2.1743.

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The antioxidant properties of natural compounds have garnered significant attention for their potential therapeutic applications. Solanum ferox, a plant traditionally used in several countries for medicinal purposes, has been identified as possessing potential antioxidant properties. However, the extent and efficacy of its antioxidant capacity have not been thoroughly examined, creating a gap in understanding its effectiveness compared to established antioxidants like ascorbic acid. This study aims to evaluate the antioxidant capacity of Solanum ferox using DPPH and FRAP assays across concentr

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Rozprawy doktorskie na temat "DPPH assay"

Oliveira, Sandro de. "Determinação da capacidade antirradicalar de produtos naturais utilizando-se a quimiluminescência do luminol e ensaios fotométricos com radicais estáveis." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-05122011-114158/.

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Os organismos vivos estão expostos à ação oxidativa de espécies reativas de oxigênio (ERO), causando uma série de doenças degenerativas como câncer, aterosclerose, diabetes, artrite e doenças do coração. Estudos têm demonstrado que o consumo de substâncias antioxidantes na dieta diária podem prevenir estes processos oxidativos que provocam o envelhecimento precoce do organismo. Nas últimas décadas tem se destacado o interesse em encontrar antioxidantes naturais para o emprego em produtos alimentícios ou farmacêuticos, com a finalidade de substituir antioxidantes sintéticos, os quais apresentam

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Delarmelina, Juliana Macedo. "Avaliaçãoda ação antimutagênica da Ipriflavonacontra os danos induzidos por ciclofosfamida." Universidade Federal do Espírito Santo, 2012. http://repositorio.ufes.br/handle/10/5759.

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Made available in DSpace on 2016-12-23T13:49:05Z (GMT). No. of bitstreams: 1 Juliana Macedo.pdf: 1847907 bytes, checksum: 0c2c478111632f7e86372a5f0f6c8756 (MD5) Previous issue date: 2012-05-05 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Ipriflavone is a synthetic isoflavone derivative from daidzein and clinically prescribed for treating and preventing osteoporosis in postmenopausal women. We investigated the potential of this drug against the cytotoxic and mutagenic effects induced by cyclophosphamide (CPA) chemotherapy, using the micronucleus assay in bone marrow ery

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Junior, Marcos Vinicius de Santana Leandro. "Análise comparativa do teste imunocromatográfico DPP-Biomanguinhos com ELISA e RIFI no diagnóstico da leishmaniose visceral canina." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/5/5160/tde-05082014-153256/.

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Com o objetivo de avaliar o desempenho do teste rápido DPP® LVC comparando com os testes de ELISA e RIFI (Bio-Manguinhos, Br), assim como ELISA e RIFI in-house, empregando como antígeno formas promastigotas de L. (L.) infantum chagasi, com ênfase a reatividade cruzada com outros agentes infecciosos, soros de cães infectados por L. (L.) infantum chagasi, clinicamente sintomáticos (n=48) e assintomáticos (n=39), assim como soros de cães sadios e não infectados (n=18), e soros de cães infectados por Babesia canis (n=9), Dirofilaria immitis (n=4), Trypanosoma cruzi (n=6), Ehrlichia canis (n=17), N

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Li, Liao. "Chemical Forays of Fungal Metabolites." Phd thesis, 2018. http://hdl.handle.net/1885/148782.

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This thesis contains six chapters and the research presented within focuses on three parts. The first part (chapter one to three) was the isolation of antibacterial and antioxidant mushroom metabolites, and the synthesis towards analogues of discovered natural products. The following part (chapter four) was to assess antioxidant activities of synthetic compounds and investigate their SAR (structure-activity relationship), by use of a developed DPPH assay. The last part (chapter five to six) was the discovery of an abiotic halogenation reaction among a class of fungal metabolites, azaphilones.

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Shum, Adrienne. "Examining the bubble structure and antioxidant activity of pea fibre-enriched bread using image and texture analysis, ultrasound analysis, and antioxidant assays." 2012. http://hdl.handle.net/1993/5028.

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The addition of pea fibre to wheat bread supports the growing trend of improving health through diet. Various evaluation tools (bread scoring, C-cell, texture profile analysis, and ultrasound) were used to monitor the sensory and mechanical quality of air bubbles in bread. Different pea fibre particle sizes (250, 125, 180, 90 μm) were added at 0, 2, 4, 6, 8 g/serving into a bread formulation. Improvements in specific loaf volume were observed when water absorption was optimized. Adequate water absorption mitigated the high dough viscosity effect of pea fibre. The 1,1-diphenyl-2-picrylhydrazyl

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Honório, José Miguel Santos da Fonseca Beja. "Effects of pituitary adenylate cyclase activating peptide (PACAP) and related peptides on human retinoblastoma Y79 cells." Master's thesis, 2013. http://hdl.handle.net/10451/29596.

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Trabalho Final de Mestrado Integrado, Ciências Farmacêuticas, Universidade de Lisboa, Faculdade de Farmácia, 2014 Retinoblastoma is an aggressive neuroblastic tumour and, although rare, it is the most common primary intraocular malignancy of infancy and childhood. If untreated, retinoblastoma will grow and produce seeding in the eye, leading to retinal detachment, necrosis and invasion of the orbit, optic nerve, and central nervous system. Numerous clinical data indicate that retinoblastoma may be fatal. The Y79 line is the most prominent retinoblastoma cell line. It has been demonstrated t

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Części książek na temat "DPPH assay"

Rubab, Momna, Ramachandran Chelliah, and Deog-Hwan Oh. "Screening for Antioxidant Activity: Diphenylpicrylhydrazine (DPPH) Assay." In Methods in Actinobacteriology. Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-1728-1_61.

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Londonkar, Ramesh, and Maithilee Kesralikar. "In Vitro Anticancer Screening of Methanolic Extract of Stachytarpheta Mutabilis." In Proceedings of the Conference BioSangam 2022: Emerging Trends in Biotechnology (BIOSANGAM 2022). Atlantis Press International BV, 2022. http://dx.doi.org/10.2991/978-94-6463-020-6_19.

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AbstractIn therapeutic plants, phytochemicals are found in abundance. A family of verbena known as vervain (verbenaceae) consists of over 100 genera and nearly 2600 species. Among the Verbenaceae family is Stachytarpheta, a green perennial herb. The species is being examined in this study for its phytochemical, antioxidant, and anti-inflammatory properties. Stachytarpheta mutabilis methanol extracts were studied for their phytochemical screening, antimicrobial, anti-inflammatory, and anticancerous effects in the current study. Phytochemical study revealed the presence of alkaloids, flavonoids,

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Nenadis, Nikolaos, and Maria Z. Tsimidou. "DPPH (2,2-di(4-tert-octylphenyl)-1-picrylhydrazyl) radical scavenging mixed-mode colorimetric assay(s)." In Measurement of Antioxidant Activity & Capacity. John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119135388.ch8.

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Vasishta, P. A., K. Harini, and S. Rajeshkumar. "Free Radical Scavenging Activity of Acacia and Stevia and Stevia Mediated Selenium Nanoparticles using DPPH and H2O2 Assay." In Advances in Sports Science and Technology. CRC Press, 2025. https://doi.org/10.1201/9781003616283-176.

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Karagecili, Hasan. "Grape Seeds Using As Natural Antioxidant Sources." In Natural Antioxidants and in Vitro Antioxidant Assays. Nobel Tip Kitabevleri, 2024. http://dx.doi.org/10.69860/nobel.9786053359333.11.

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Grape seeds (GS) are waste products from the manufacturing of wine, molasses, and fruit juice. They are the portion of grapes that have the highest concentration of phenolic and antioxidant chemicals, second only to the fruits. In addition to highly polymerized procyanidins, the GS contains catechin, epicatechin, gallocatechin, epigallocatechin, and gallic acid. GS may be a good substitute for being used in the creation of new goods with a high added value, such as antioxidant-rich smart foods that are extremely concentrated. Because of its strong antioxidant, anticancer, antibacterial, anti-a

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Ayembilla, Jacob Apibilla, Phyllis Naa Yarley Otu, Eunice A. Dotse, et al. "Antioxidant and Anticancer Potential of Natural Cocoa Extract." In Technological Innovation Driving Sustainable Entrepreneurial Growth in Developing Nations. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-9843-9.ch007.

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The aim of this study was to investigate antioxidant and anticancer potentials of natural cocoa extracts. Antioxidant properties of the extracts were evaluated by DPPH assay, total phenolic content by Folin-Ciocalteau and reduced glutathione content by O-phthalaldehyde assays. Antiproliferative activity was also evaluated on leukaemia and prostate cancer cell lines using MTT assay. The hydroethanolic extracts of cocoa roots and beans and aqueous cocoa leaves showed high total antioxidant activities with the root extract having the strongest scavenging effect on DPPH and the highest total pheno

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Florin Danet, Andrei. "Recent Advances in Antioxidant Capacity Assays." In Antioxidants - Benefits, Sources, Mechanisms of Action. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96654.

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This work presents a survey of the important antioxidant capacity/activity assays applied for a diversity of samples including plant extracts, foods, biological material, etc. The published materials are critically discussed, emphasizing the recent findings in the field. New and emergent antioxidant capacity assays, such as nanoparticles-based assay, are also presented. The discussion includes chemical-based methods as well as biochemical and cellular assays. Chemical methods detailed are radical/ROS-based scavenging assays (the trolox equivalent antioxidant capacity (TEAC/ABTS), 2,2-diphenyl-

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Everton, Gustavo Oliveira, Ana Paula Muniz Serejo, Mariana Oliveira Arruda, et al. "Antioxidant and anticancer activity in vitro of Syzygium aromaticum essential oil." In Open Science Research XIX. Editora Científica Digital, 2025. https://doi.org/10.37885/250319073.

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Objective: This study evaluated the in vitro antioxidant and anticancer activities of essential oil (EO) from Syzygium aromaticum (clove). Methods: Clove flower buds were collected in Maranhão, Brazil, and hydrodistillation was used for EO extraction. Antioxidant activity was assessed via ABTS, DPPH, and FRAP assays, while anticancer activity was tested against various human cancer cell lines (colon, lung, liver, prostate, neuroblastoma, etc.) using the SRB assay to determine IC50 values. The chemical composition was analyzed by GC-MS. Results: The EO demonstrated strong antioxidant activity,

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Everton, Gustavo Oliveira, Ana Paula Muniz Serejo, Mariana Oliveira Arruda, et al. "Antioxidant and anticancer activity in vitro of Chenopodium ambrosioides L. essential oil." In Open Science Research XIX. Editora Científica Digital, 2025. https://doi.org/10.37885/250319071.

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Objective: This study evaluated the in vitro antioxidant and anticancer activities of essential oil (EO) from Chenopodium ambrosioides. Methods: Leaves were collected in Maranhão, Brazil, and the EO was extracted via hydrodistillation using a Clevenger apparatus. Antioxidant activity was assessed through the ABTS, DPPH, and FRAP assays. Anticancer activity was evaluated on various cancer cell lines, including colon, lung, liver, and prostate, using the SRB assay to determine the inhibitory concentration (IC50). The chemical composition was analyzed via gas chromatography-mass spectrometry (GC-

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Resool Hussein, Malik Yahia Abdul, Narender Malothu, and Haritha Lanka. "Phytochemical Study, in Vitro Antioxidant and Antidiabetic Activity of Methonalic Leaf Extract of Linderina Parviflora." In Current Trends in Drug Discovery, Development and Delivery (CTD4-2022). Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/9781837671090-00656.

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In a general context, the significance of a number of medicinal plants has been investigated in the treatment of diabetes mellitus. In this regard, to establish the anti-diabetic potential of Linderina Parviflora, one of the medicinal herbs this study was initiated. The main objective of the study was to evaluate the in vitro anti-oxidant and anti-diabetic activity of methanolic extracts of Linderina Parviflora leaves. During screening for phytochemicals the total phenolic and flavonoid content was estimated. In vitro antidiabetic activity was assessed by α-glucosidase and α-amylase inhibitory

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Streszczenia konferencji na temat "DPPH assay"

Wongcharu, Aoraya, Chanikan Sonklin, Cherdchai Laongtiparos, Siriporn Pranee, Samitthichai Seeyangnok, and Nisalak Trongsiriwat. "Chemical Constituents of Black Galingale Rhizome from Hexane Crude Extract and its Nanoemulsion Preparation." In 2024 8th International Conference on Materials Engineering and Nano Sciences & 2024 8th International Conference on Material Engineering and Manufacturing. Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-p1fkxg.

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Kaempferia parviflora (Black Galingale) is a medicinal plant in the family Zingiberaceae. It has biological activities, but the bioactive compounds are easily decomposed and poorly soluble. This research has focused on the chemical constituents and bioactivities of the hexane crude extract from K. parviflora rhizomes for nanotechnology. The K. parviflora rhizomes were extracted with hexane by the maceration. The crude extract 39.99 g was obtained and purified using column chromatography to give four pure compounds, namely (1) 5-hydroxy-3,7-dimethoxyflavone, (2) 5-hydroxy-7-methoxyflavone, (3)

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Popovici, Lucia-Florina, and Simona Oancea. "COMPARATIVE STUDY ON PHENOLICS, FLAVONOIDS, TANNINS AND ANTIOXIDANT PROPERTIES OF CALENDULA OFFICINALIS EXTRACTS OBTAINED BY DIFFERENT EXTRACTION TECHNIQUES." In SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/6.1/s25.21.

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The aim of this study was to evaluate the influence of several extraction methods on the content of bioactive compounds of polyphenolic structure and antioxidant properties of petals from marigold flowers (Calendula officinalis). Ethanolic extracts prepared using maceration, turbo-extraction and bead-beating techniques were investigated for total phenolics, flavonoids and tannins, and antioxidant activities as measured by FRAP and DPPH assays, as well. The results showed that the highest phenolic content (1316.367 � 4.316 mg GAE/100 g DW) and antioxidant activity by FRAP (505.755 � 4.623 mg as

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MOHD ASRI, Nurfitrah Syahirah. "Antioxidative Properties of Harumanis Mango Leaves using Microwave-Assisted Extraction." In Composite Materials. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903636-2.

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Abstract. In this study, a microwave-assisted extraction technique (MAE) was used to extract antioxidant compounds from the pruned leaves of Harumanis mango with water as the solvent. The one-factor-at-a-time (OFAT) approach was used to study the effect of several important parameters in the extraction process on antioxidant activity. These parameters include particle size (200, 100, 60, 30 and <30 mesh), sample size (0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 g), and sample-to-solid ratio (2:50, 2:100, 2:150, 2:200, and 2:250 g/mL). Antioxidant activity was determined using the 1,1-diphenyl-2-picryl

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Som, Ayub Md, Norizan Ahmat, Hairul Amani Abdul Hamid, et al. "Phytochemical Screening and Antioxidant Activity of Hylocereus undatus Foliage: Effects of Using Different Drying and Assays Methods." In 5th International Conference on Global Sustainability and Chemical Engineering 2021 (ICGSCE2021). Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-m2r02u.

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Phytochemical screening was conducted on Hylocereusundatus foliage to determine the presence of alkaloids, flavonoids, tannins, and saponins using methanol and chloroform solvents via oven-dried and open air-dried methods. As for the antioxidant activity, powdered Hylocereusundatus foliage were extracted using both solvents through Ferric Reduction Antioxidant Power (FRAP) assay; and the findings were then compared to 2,2-Diphenyl-1-Ipicrylhydrazyl (DPPH) assay from previous studies. Results revealed that for both methods in phytochemical screening, flavonoids were present only in methanol ext

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Mitić, Milan, Pavle Mašković, Vesna Stankov Jovanović, et al. "EXPLORING THE ANTIOXIDANT ACTIVITY OF BLEEDING SAP FROM VARIOUS GRAPE VARIETIES." In 3rd International Symposium on Biotechnology. University of Kragujevac, Faculty of Agronomy in Čačak, 2025. https://doi.org/10.46793/sbt30.71mm.

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This investigation systematically evaluated the total phenolic content (TPC) and antioxidant properties of bleeding sap obtained from six grape cultivars—Evita, Cabernet Sauvignon, Prokupac, Smederevka, Muscat Hamburg, and Othello. The study employed quantitative assays to measure TPC, alongside three complementary methods (DPPH, ABTS, and CUPRAC) to determine the antioxidant capacity of the samples. The bleeding sap exhibited a wide range of phenolic concentrations, with TPC values spanning from 5.03 to 359.38 μg GAE/mL, suggesting significant variability among the cultivars. Antioxidant acti

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Khalid Saeed, M., Nusrat Ejaz, Ijaz Ahmed, et al. "Nutritional evaluation and DPPH assay of Pakistani variety of Fennel (Foeniculum vulgare)." In 2009 IEEE/ICME International Conference on Complex Medical Engineering - CME 2009. IEEE, 2009. http://dx.doi.org/10.1109/iccme.2009.4906687.

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Janić, Marijana, Aleksandar Krstić, Ana Valenta Šobot, et al. "DIFFERENCE IN PHYTOCHEMICAL COMPOSITION AND ANTIOXIDANT ACTIVITY SCREENING OF TWO METHANOLIC SAGE EXTRACTS." In 8th Workshop Food and Drug Safety and Qualit. Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, 2024. http://dx.doi.org/10.46793/8fdsq.pb3mj.

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Sage has been used in traditional medicine to prevent and treat many health problems. This study aimed to determine and compare the phytochemical composition and antioxidative activity of sage leaf extracts obtained with 50% methanol (50MSE) and 80% methanol (80MSE). We determined the total phenolic content (TPC), total tannin content (TTC), and total flavonoid content (TFC) in extracts. Terpenoids were identified using gas chromatography-mass spectrometry (GC–MS), and the radical scavenging capacity of extracts was measured using DPPH assay. TPC was higher in 80MSE, TTC was higher in 50MSE, a

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Jocić, Ana, Slađana Marić, Jasmina Mušović, Danijela Tekić, and Aleksandra Dimitrijević. "EFFICIENT REMOVAL OF DELTAMETHRIN AND CLOMAZONE FROM WATER USING IONIC LIQUID-BASED AQUEOUS BIPHASIC SYSTEMS." In 8th Workshop Food and Drug Safety and Qualit. Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, 2024. http://dx.doi.org/10.46793/8fdsq.pb4aj.

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Moldovan, Camelia, Viorica-Mirela Popa, Aurica Breica Borozan, Diana-Nicoleta Raba, and Delia-Gabriela Dumbrava. "ROSEHIP CHUTNEY - A VALUABLE SOURCE OF ANTIOXIDANTS." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023v/6.2/s25.44.

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The new tendency of consumers and processors in the food industry is to use organic products. Because intensive crops involve the use of pesticides and fertilizers, a bio alternative to tomatoes can be the rosehip from spontaneous flora. In this study, four variants (control, sweet, spicy and hot) of rosehip chutney were prepared as an alternative for tomato ketchup. The sensory characteristics were evaluated (by hedonic scale). The vitamin C content (by titrimetric iodometric method), polyphenols content (by Folin Ciocalteu assay) and free radical inhibition activity (by DPPH assay) were dete

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Jadid, Nurul, Dewi Hidayati, Sylviana Rosyda Hartanti, Byan Arasyi Arraniry, Rizka Yuanita Rachman, and Wiwi Wikanta. "Antioxidant activities of different solvent extracts of Piper retrofractum Vahl. using DPPH assay." In PROCEEDING OF INTERNATIONAL BIOLOGY CONFERENCE 2016: Biodiversity and Biotechnology for Human Welfare. Author(s), 2017. http://dx.doi.org/10.1063/1.4985410.

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Raporty organizacyjne na temat "DPPH assay"

ภู่ทอง, ทรงจันทร์, กิตตินันท์ โกมลภิส, อุมาพร พิมพิทักษ์ та อณุมาศ บัวเขียว. ฤทธ์ต้านอนุมูลอิสระและยับยั้งการเจริญฃองเซลล์มะเร็งจากสารสกัดใบชะอม. จุฬาลงกรณ์มหาวิทยาลัย, 2018. https://doi.org/10.58837/chula.res.2018.103.

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สารต้านอนุมูลอิสระจากธรรมชาติที่มีในพืชผักที่บริโภคประจำวันได้รับความสนใจมากเพราะมีความปลอดภัยในการใช้มากกว่าสารต้านอนุมูลอิสระสังเคราะห์ จากรายงานต่างๆ พบว่าสารพฤกษเคมี โดยเฉพาะอย่างยิ่งสารประกอบฟินอลิกบางชนิดมีฤทธิ์ในการต้านอนุมูลอิสระ จากการวิเคราะห์ผักพึ้นบ้านที่นิยมบริโภค 20 ชนิดพบว่า ชะอม (Acacia pennata) มีปริมาณสารประกอบฟินอลิกสูงมากที่สุดถึง 45.3 ไมโครกรัมกรดแกลลิกต่อมิลลิกรัมของสารสกัดแห้ง ดังนั้นในงานวิจัยนี้จึงทำการทดสอบความสามารถในการต้านอนุมูลอิสระของสารสกัดหยาบจากใบชะอมที่เป็นใบสด (F) และใบแห้ง (D) ที่ได้จากการสกัดด้วยน้ำ (H) หรือ 95% เอทานอล (E) จากการทดสอบฤทธิ์ต้านอนุมูลอิสระด

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โตสุโขวงศ์, ปิยะรัตน์, จุลินทร์ โอภานุรักษ์, สุพจน์ รัชชานนท์, ชาญชัย บุญหล้า та อภิวัฒน์ มุทิรางกูร. โครงการวิจัยนำร่องมะเร็งกระเพาะปัสสาวะในผู้สูงอายุ : ผลของการปรับเปลี่ยนการดำเนินชีวิตร่วมกับการให้มะนาวผงกับขมิ้นชัน ต่อการเปลี่ยนแปลงของการแสดงออกของยีน ภาวะเหนือพันธุกรรมของจีโนม ตัวบ่งชี้ทางชีวภาพ และอัตราการกลับเป็นซ้ำ : รายงานผลการวิจัย. จุฬาลงกรณ์มหาวิทยาลัย, 2011. https://doi.org/10.58837/chula.res.2011.27.

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วัตถุประสงค์: ภาวะเครียดจากออกซิเดชั่นและการเปลี่ยนแปลงแบบเหนือพันธุกรรมเกี่ยวข้องกับการเกิดมะเร็งกระเพาะปัสสาวะ โดยผู้วิจัยตั้งสมมติฐานว่าระดับภาวะเครียดจากออกซิเดชั่นน่าจะสัมพันธ์กับการลดลงของระดับเมทิลเลชั่น ดังนั้นการศึกษานี้จึงมีวัตถุประสงค์เพื่อประเมินความสัมพันธ์กระหว่างระดับการเกิด LINE1 methylation กับระดับตัวบ่งชี้ภาวะเครียดจากออกซิเดชั่นในผู้ป่วยมะเร็งกระเพาะปัสสาวะของเซลล์ในปัสสาวะ และศึกษาคุณค่าทางคลินิกในการวินิจฉัยโรคมะเร็งกระเพาะปัสสาวะ วิธีการศึกษา: ผู้ป่วยมะเร็งกระเพาะปัสสาวะจำนวน 61 ราย และคนปกติจำนวน 45 ราย แล้ววัดระดับการเกิด methylation ทั้งหมด รวมทั้ง mCuC(partially meth

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