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Journal articles on the topic 'Phenolics'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Li, Qianxin, Juan Chai, Shenghui Deng, et al. "The Comparison of the Profile of Phenolic Compounds in Noni (Morinda citrifolia L.) Fruit by Different Drying Methods." Foods 14, no. 8 (2025): 1398. https://doi.org/10.3390/foods14081398.

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In this study, the compositional shifts in free and bound phenolic compounds of Morinda citrifolia L. (Noni) processed by different drying methods were investigated. Twenty-seven phenolic compounds, predominantly rutin and quinic acid, were discovered in fresh Noni fruit. Vacuum freeze-drying retained the highest free phenolic content, with rutin (1809.83 mg/kg DW) and quinic acid (198.72 mg/kg DW) as the primary constituents, while bound phenolics were dominated by benzoic acid (35.56 mg/kg DW). Hot-air drying reduced the free phenolics by 51.59% (80% methanol) and the bound phenolics (base h

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Durruty, María Ximena, María Marcela Rodríguez, Ana Karina De Figueiredo, Carmen Margarita Mateo, Susana María Nolasco, and Isabel Concepción Riccobene. "EXTRACTION OF FREE AND BOUND PHENOLICS FROM GLABROUS CANARY SEED (Phalaris canariensis L.) HULLS." Latin American Applied Research - An international journal 54, no. 1 (2024): 99–106. http://dx.doi.org/10.52292/j.laar.2024.1268.

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The aim was to extract free phenolics using a green solvent (ethanol), and bound phenolics from glabrous canary seed hulls. The efficiency of ethanol 75% was compared with that of other solvents used in the literature (acetone 70%; methanol 80%) in terms of phenolic yield and antioxidant activity. Bound phenolics were extracted with ethyl acetate, prior to hydrolysis with NaOH 2 M. The phenolic extracts obtained were characterized according to extraction yield, total phenols, flavonoides, antioxidant activity, radical DPPH; and phenolic profile, HPLC. Methanol 80% had lower extraction yield, a

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Kumar, Krishna, Pratima Debnath, Sailendra Singh, and Navin Kumar. "An Overview of Plant Phenolics and Their Involvement in Abiotic Stress Tolerance." Stresses 3, no. 3 (2023): 570–85. http://dx.doi.org/10.3390/stresses3030040.

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Secondary metabolites, such as phenols and salicylic, play a crucial role in the regulation of development and tolerance mechanisms against a wide range of stresses. During adverse conditions such as biotic and abiotic stresses, plants induce the biosynthesis of phenolic compounds to provide tolerance. Phenolics are secondary aromatic metabolites synthesized through the shikimate/phenylpropanoid pathway or polyketide acetate/malonate pathway, which produce monomeric and polymeric phenolics. Phenolic compounds in plants not only take part in preventing stresses but also in regulating physiologi

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Ye, Lingxu, Sumei Zhou, Liya Liu, et al. "Phenolic Compounds and Antioxidant Capacity of Brown Rice in China." International Journal of Food Engineering 12, no. 6 (2016): 537–46. http://dx.doi.org/10.1515/ijfe-2015-0346.

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Abstract The phenolic compounds and antioxidant activity of brown rice are well known but the extent to which phenolics and antioxidant activity varies within rice (Oryza sativa) is not known. This study evaluated the natural variation of phenolic compounds in brown rice of the major cultivars currently grown in China. Free phenolics were extracted with chilled methanol, while bound phenolics were released and extracted by alkaline hydrolysis. There were significant differences in phenolic and flavonoid content between these cultivars and significant differences in bound and total phenolics be

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5

Zilic, Sladjana, Vesna Hadzi-Taskovic-Sukalovic, Dejan Dodig, Vuk Maksimovic, and Vesna Kandic. "Soluble free phenolic compound contents and antioxidant capacity of bread and durum wheat genotypes." Genetika 45, no. 1 (2013): 87–100. http://dx.doi.org/10.2298/gensr1301087z.

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The objective of this study was to determine phenolic compounds and the total antioxidant capacity in the grain of ten bread (T. aestivum L.) and ten durum (T. durum Desf.) wheat genotypes. Soluble free forms of total phenolics, flavonoids, PVPP (polyvinylpolypyrrolidone) bound phenolics, proanthocyanidins and phenolic acids were investigated. In addition, the correlation coefficients between total antioxidant capacities and the concentration of different soluble free phenolic compounds, as well as between soluble free total phenolics and phenolic acids, flavonoids and PVPP bound phenolics wer

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Wang, Ruibin, Ming Li, Margaret Anne Brennan, Don Kulasiri, Boli Guo, and Charles Stephen Brennan. "Phenolic Release during In Vitro Digestion of Cold and Hot Extruded Noodles Supplemented with Starch and Phenolic Extracts." Nutrients 14, no. 18 (2022): 3864. http://dx.doi.org/10.3390/nu14183864.

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Dietary phenolic compounds must be released from the food matrix in the gastrointestinal tract to play a bioactive role, the release of which is interfered with by food structure. The release of phenolics (unbound and bound) of cold and hot extruded noodles enriched with phenolics (2.0%) during simulated in vitro gastrointestinal digestion was investigated. Bound phenolic content and X-ray diffraction (XRD) analysis were utilized to characterize the intensity and manner of starch-phenolic complexation during the preparation of extruded noodles. Hot extrusion induced the formation of more compl

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7

Zhao, Yuzhu, Doudou Liu, Jiaxuan Zhang, et al. "Improving Soluble Phenolic Profile and Antioxidant Activity of Grape Pomace Seeds through Fungal Solid-State Fermentation." Foods 13, no. 8 (2024): 1158. http://dx.doi.org/10.3390/foods13081158.

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Grape pomace seeds contain abundant phenolic compounds, which are also present in both soluble and insoluble forms, similar to many other plant matrices. To further increase the extractable soluble phenolics and their antioxidant activities, grape pomace seeds were fermented with different fungi. Results showed that solid-state fermentation (SSF) with Aspergillus niger, Monascus anka, and Eurotium cristatum at 28 °C and 65% humidity had a significantly positive impact on the release of soluble phenolics in grape pomace seeds. Specifically, SSF with M. anka increased the soluble phenolic conten

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8

Medic, Aljaz, Jerneja Jakopic, Anita Solar, Metka Hudina, and Robert Veberic. "Walnut (J. regia) Agro-Residues as a Rich Source of Phenolic Compounds." Biology 10, no. 6 (2021): 535. http://dx.doi.org/10.3390/biology10060535.

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The present study was designed to identify and quantify the major phenolic compounds (phenolics) in the inner and outer husks, buds and bark of the Persian walnut, Juglans regia L. A comparison across six different cultivars grown in Slovenia was also carried out: ‘Fernor’, ‘Fernette’, ‘Franquette’, ‘Sava’, ‘Krka’ and ‘Rubina’. A total of 83 compounds were identified, which included 25 naphthoquinones, 15 hydroxycinnamic acids, 8 hydroxybenzoic acids, 13 flavanols, 2 flavones, 1 flavanone and 19 flavonols. For the first time, 38 phenolics in the husks, 57 phenolics in the buds and 29 phenolics

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Vasilakopoulou, Paraskevi B., Aimilia-Tatiana Gousgouni, Amalia E. Yanni, Nikolaos Kostomitsopoulos, Vaios T. Karathanos, and Antonia Chiou. "Polar Phenol Detection in Plasma and Serum: Insights on Sample Pre-Treatment for LC/MS Analysis and Application on the Serum of Corinthian Currant-Fed Rats." Biomolecules 12, no. 12 (2022): 1838. http://dx.doi.org/10.3390/biom12121838.

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Analysis of plasma and serum provides valuable information on the amounts of polar phenols’ circulating after ingestion. In the present study, protein precipitation (PPT), liquid–liquid extraction (LLE), solid phase extraction (SPE), enzymatic hydrolysis and their combinations were meticulously evaluated for the extraction of a variety of polar phenolic moieties from plasma and serum. The recovery values of the above methods were compared; satisfactory recoveries (>60%) were attained for most analytes. Polar phenol aglycones undergo degradation with enzymatic hydrolysis; however, their exte

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10

Zhao, Xin, Edward E. Carey, Janice E. Young, Weiqun Wang, and Takeo Iwamoto. "Influences of Organic Fertilization, High Tunnel Environment, and Postharvest Storage on Phenolic Compounds in Lettuce." HortScience 42, no. 1 (2007): 71–76. http://dx.doi.org/10.21273/hortsci.42.1.71.

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As the largest group of phytochemicals, dietary phenolics play an important role in human health and disease prevention. Cultural practices have been shown to have the potential for affecting phenolic compounds in food crops. Spring and summer trials were conducted in 2003 to examine the effects of organic fertilization and high tunnel environments on phenolic constituents of lettuce (Lactuca sativa L.) cultivars Red Sails and Kalura. Effects of postharvest storage at 4 °C for 16 days on total phenolics of lettuce harvested from the summer trial were also evaluated. Total phenolics, excluding

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11

Brezani, Viliam, Karel Smejkal, Jan Hosek, and Veronika Tomasova. "Anti-inflammatory Natural Prenylated Phenolic Compounds - Potential Lead Substances." Current Medicinal Chemistry 25, no. 10 (2018): 1094–159. http://dx.doi.org/10.2174/0929867324666170810161157.

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Background: Natural phenolics are secondary plant metabolites, which can be divided into several categories with the common structural feature of phenolic hydroxyl. The biological activity of phenolics is often modified and enhanced by prenylation by prenyl and geranyl; higher terpenoid chains are rare. The type of prenyl connection and modification affects their biological activity. Objective: This review summarizes information about prenylated phenols and some of their potential sources, and provides an overview of their anti-inflammatory potential in vitro and in vivo. Method: The literatur

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Padda, M. S., and D. H. Picha. "(51) Changes in Phenolic Compounds in Sweetpotatoes during Low Temperature Storage." HortScience 40, no. 4 (2005): 1088A—1088. http://dx.doi.org/10.21273/hortsci.40.4.1088a.

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Sweetpotatoes may be potentially high in concentration of certain phytochemical compounds, including phenolics. Low temperature stress-induced phenolic compounds may enhance the nutraceutical value of sweetpotatoes. However, extended exposure to low temperature results in chilling injury. Cured and non-cured roots of `Beauregard' sweetpotatoes were exposed to low temperature storage (5 °C) for up to 4 weeks. The total phenolics and individual phenolic acid contents were determined at weekly intervals using Folin-Denis reagent and reversed-phase HPLC, respectively. Total phenolics and individua

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13

Garcia-Mier, Lina, Adriana E. Meneses-Reyes, Sandra N. Jimenez-Garcia, et al. "Polyphenol Content and Antioxidant Activity of Stevia and Peppermint as a Result of Organic and Conventional Fertilization." Journal of Food Quality 2021 (January 31, 2021): 1–6. http://dx.doi.org/10.1155/2021/6620446.

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Stevia rebaudiana Bertoni and Mentha piperita are plants that generate interest mainly due to the presence of bioactive compounds in their leaves, such as phenolics. Studies indicate that phenolics have pharmacological and therapeutic properties, including antioxidant activity. Phenolic compounds may be affected by the type of fertilization. For this reason, organic and chemical fertilization were evaluated along with antioxidant activity. Results showed significant differences for total phenols in organic peppermint (62% higher content). Also, DPPH test displayed differences for peppermint an

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Yarnes, Christopher T., William J. Boecklen, Kati Tuominen, and Juha-Pekka Salminen. "Defining phytochemical phenotypes: size and shape analysis of phenolic compounds in oaks (Fagaceae, Quercus) of the Chihuahuan Desert." Canadian Journal of Botany 84, no. 8 (2006): 1233–48. http://dx.doi.org/10.1139/b06-076.

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Interspecific variation in phenolic metabolism across plant species has been correlated to numerous ecological factors, yet generalities concerning the ecological role(s) of phenolics remain elusive. Moreover, studies of allometric variation (absolute and relative concentration) in phenolic metabolism are rare despite the importance of each to ecological interactions. In this study, we characterize individual phenolics in a group of 12 oak species from the Chihuahuan Desert and examine interspecific variation in the absolute and relative concentrations of phenolics using size and shape analysi

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15

Fleming, Morgan A., Nicholas H. Low, and Christopher H. Eskiw. "Phenolic Compounds from Haskap Berries Have Structure, Combination, and Cell Line-Dependent Impacts on the Longevity-Associated Deacetylase Sirtuin 1." Cells 14, no. 4 (2025): 295. https://doi.org/10.3390/cells14040295.

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It is well established that phenolic compounds from plant sources impact readouts of cell health such as reduced radical and reactive oxygen species. However, it is unclear if specific phenolic structures impact other cellular processes or proteins, such as the evolutionary conserved deacetylase Sirtuin 1 (SIRT1), and if phenolic combinations interact synergistically to do so. We observed that structurally diverse haskap berry phenolics (caffeic acid, cyanidin, kaempferol-3-O-glucoside, and gentisic acid) differentially impacted normal primary human fibroblast growth, which has been linked to

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16

Yang, Lingguang, Peipei Yin, Chi-Tang Ho, Miao Yu, Liwei Sun, and Yujun Liu. "Effects of thermal treatments on 10 major phenolics and their antioxidant contributions in Acer truncatum leaves and flowers." Royal Society Open Science 5, no. 6 (2018): 180364. http://dx.doi.org/10.1098/rsos.180364.

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This study aimed to investigate effects of thermal treatments on major phenolics and their antioxidant contributions in Acer truncatum leaves and flowers (ATL and ATF, respectively). With ultra performance liquid chromatography-diode array detector-quadrupole time-of-flight-mass spectrometer/mass spectrometer, phenolic compositions of ATF were first characterized and compared with those of ATL. An optimized high performance liquid chromatography fingerprint was then established, and 10 major phenolics existing in both ATL and ATF were quantified. Gallic acid derivatives and flavonol-3- O -glyc

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Kagan, Isabelle A., Ben M. Goff, and Michael D. Flythe. "Soluble Phenolic Compounds in Different Cultivars of Red Clover and Alfalfa, and their Implication for Protection against Proteolysis and Ammonia Production in Ruminants." Natural Product Communications 10, no. 7 (2015): 1934578X1501000. http://dx.doi.org/10.1177/1934578x1501000732.

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Red clover ( Trifolium pratense) contains soluble phenolic compounds with roles in inhibiting proteolysis and ammonia production. Alfalfa ( Medicago sativa) has been found to have a low phenolic content, but few alfalfa and red clover cultivars have been compared for phenolic content. Total soluble phenolics were quantified by a Folin-Ciocalteu colorimetric assay in nine red clover and 27 alfalfa cultivars. Mean total phenolic contents of red clover and alfalfa were 36.5 ± 4.3 mg/gdw and 15.8 ± 1.4 mg/gdw, respectively, with the greater standard deviation of red clover possibly indicating more

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18

Mitic, Milan, Mirjana Obradovic, Danijela Kostic, Ruzica Micic, and Emilija Pecev. "Polyphenol content and antioxidant activity of sour cherries from Serbia." Chemical Industry and Chemical Engineering Quarterly 18, no. 1 (2012): 53–62. http://dx.doi.org/10.2298/ciceq110701046m.

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The aim of this study is to evaluate the content of phenolics: the total phenols (TP), flavonoids (TF), anthocyanins (TA), as well as the total antioxidant capacity (TAC) in three sour cherry cultivars (Prunus cerasus L.) introduced to the southeast Serbia climate conditions. Among the researched sour cherries, ?Oblacinska? cultivar contained the highest amounts of all groups of phenolics, followed by ?Cigancica? > ?Marela?. A significant difference were observed in the phenolic content among different cultivars and growing seasons (p<0.05), and the phenolic compounds were significantly

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19

Martinović, Josipa, Rita Ambrus, Mirela Planinić, et al. "Microencapsulation of Grape Pomace Extracts with Alginate-Based Coatings by Freeze-Drying: Release Kinetics and In Vitro Bioaccessibility Assessment of Phenolic Compounds." Gels 10, no. 6 (2024): 353. http://dx.doi.org/10.3390/gels10060353.

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The phenols from grape pomace have remarkable beneficial effects on health prevention due to their biological activity, but these are often limited by their bioaccessibility in the gastrointestinal tract. Encapsulation could protect the phenolics during digestion and influence the controlled release in such an intestine where their potential absorption occurs. The influence of freeze-drying encapsulation with sodium alginate (SA) and its combination with gum Arabic (SA-GA) and gelatin (SA-GEL) on the encapsulation efficiency (EE) of phenol-rich grape pomace extract and the bioaccessibility ind

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Djurdjevic, L., Gordana Gajic, Snezana Jaric, Olga Kostic, Miroslava Mitrovic, and P. Pavlovic. "Analysis of benzoic and cinnamic acid derivatives of some medicinal plants in Serbia." Archives of Biological Sciences 65, no. 2 (2013): 603–9. http://dx.doi.org/10.2298/abs1302603d.

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Natural phenolics, which are ubiquitously distributed in plants, have been reported as functional factors in phytotherapy. We have examined phenolic compounds in the leaves and inflorescences of five significant medicinal plants of different plant families: Salvia officinalis (Lamiaceae); Achillea clypeolata (Asteraceae); Nymphaea alba (Nymphaeaceae); Rumex acetosella (Polygonaceae) and Allium ursinum (Alliaceae). The examined species were rich in total phenolics (up to 30.88 mg/g dry weight). According to their total phenolics contents, the plants can be arranged in the following order: A. cl

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Zhu, Huilan, Sixin Liu, Linling Yao, Lu Wang та Congfa Li. "Free and Bound Phenolics of Buckwheat Varieties: HPLC Characterization, Antioxidant Activity, and Inhibitory Potency towards α-Glucosidase with Molecular Docking Analysis". Antioxidants 8, № 12 (2019): 606. http://dx.doi.org/10.3390/antiox8120606.

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Free and bound phenolic fractions from six buckwheat varieties were investigated for their compositions, antioxidant activities, and inhibitory effects on α-glucosidase. The results showed that different buckwheat varieties have significant differences in phenolic/flavonoid contents, and these contents were found in higher quantities in free form than in bound form. HPLC results revealed that rutin, quercetin, and kaempferol-3-O-rutinoside were the most abundant components in free and bound forms, whereas dihydromyricetin was found only in the bound form. Free phenolics showed higher antioxida

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Ramayani, Septiana Laksmi, Dania Fauzita Rarasati, and Yuliya Rizky Widyastuti. "Effect of Kitolod (Isotoma Longiflora) Leaf Extract Concentration in Gel Formula on Total Phenolic and Flavonoid Levels." Jurnal Kesehatan dr. Soebandi 12, no. 1 (2024): 32–38. http://dx.doi.org/10.36858/jkds.v12i1.573.

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Belonging to the Campanulaceae family, Kitolod (Isotoma longiflora) possesses antioxidant properties crucial for wound healing; presenting a case for its formulation into a gel and investigating the total phenolic and flavonoid content of kitolod leaf extract when in gel form is essential to understand its capabilities as an anti-inflammatory and wound-healing gel, as well as to examine the possible correlation between the extract's concentration and its phenolic and flavonoid content. This study assessed how different concentrations of kitolod leaf extract affect the total phenolic and flavon

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Zhou, Lin, Xiaohui Lin, Arshad Mehmood Abbasi, and Bisheng Zheng. "Phytochemical Contents and Antioxidant and Antiproliferative Activities of Selected Black and White Sesame Seeds." BioMed Research International 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/8495630.

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Sesame (Sesamum indicumL.) seeds are popular nutritional food but with limited knowledge about their antioxidant and antiproliferative activities of various varieties. Phytochemical profiles and antioxidant and antiproliferative activities of six varieties of sesame (Sesamum indicumL.) seeds were studied.Fenheizhi3(black) cultivar exhibited the maximum contents of total phenolics and lignans and values of total oxygen radical absorbance capacity (ORAC) and antiproliferative activity (EC50) against HepG2 cells. Bound ORAC values showed strong associations with bound phenolics contents (r=0.976,

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Tuyen, Phung Thi, Do Tan Khang, Pham Thi Thu Ha, Tran Ngoc Hai, Abdelnaser Abdelghany Elzaawely, and Tran Dang Xuan. "Antioxidant Capacity and Phenolic Contents of Three Quercus Species." International Letters of Natural Sciences 54 (May 2016): 85–99. http://dx.doi.org/10.18052/www.scipress.com/ilns.54.85.

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The antioxidant capability and phenolic contents of ethanol extracts (free phenolics) and ethyl acetate extracts (bound phenolics) of three Quercus species were estimated in this work. The antioxidant activities were examined by 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) free radical, reducing power and b-carotene bleaching methods. HPLC was employed to detect major phenolic acids. The leaf extract of Q. salicina contained maximum total phenolics while the highest total flavonoid content was found in the leaf extract of Q

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Tuyen, Phung Thi, Do Tan Khang, Pham Thi Thu Ha, Tran Ngoc Hai, Abdelnaser Abdelghany Elzaawely, and Tran Dang Xuan. "Antioxidant Capacity and Phenolic Contents of Three <i>Quercus</i> Species." International Letters of Natural Sciences 54 (May 11, 2016): 85–99. http://dx.doi.org/10.56431/p-u66fhw.

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The antioxidant capability and phenolic contents of ethanol extracts (free phenolics) and ethyl acetate extracts (bound phenolics) of three Quercus species were estimated in this work. The antioxidant activities were examined by 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) free radical, reducing power and b-carotene bleaching methods. HPLC was employed to detect major phenolic acids. The leaf extract of Q. salicina contained maximum total phenolics while the highest total flavonoid content was found in the leaf extract of Q

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Wu, Shutian, Runhong Mo, Ruohui Wang, Qingyang Li, Danyu Shen, and Yihua Liu. "Identification of Key Antioxidants of Free, Esterified, and Bound Phenolics in Walnut Kernel and Skin." Foods 12, no. 4 (2023): 825. http://dx.doi.org/10.3390/foods12040825.

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Walnut is a natural source of antioxidants. Its antioxidant capacity is determined by the distribution and composition of phenolics. The key phenolic antioxidants in various forms (free, esterified, and bound) in walnut kernel (particularly seed skin) are unknown. The phenolic compounds in twelve walnut cultivars were analyzed using ultra-performance liquid chromatography coupled with a triple quadrupole mass spectrometer in this study. A boosted regression tree analysis was used to identify the key antioxidants. Ellagic acid, gallic acid, catechin, ferulic acid, and epicatechin were abundant

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Sari, Dwi Indah Permata, Endang Prangdimurti, and Dias Indrasti. "Bioaksesibilitas Senyawa Fenolik Minuman Kakao Pasteurisasi dengan Penambahan Matriks Susu." Jurnal Teknologi dan Industri Pangan 36, no. 1 (2025): 28–39. https://doi.org/10.6066/jtip.2025.36.1.28.

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Cocoa beans and their derivatives are well-known for their health benefits, primarily attributed to phenolic compounds. While some research has explored the interactions of these compounds within food matrices, there were few reports on the release of cocoa phenolics in the gastrointestinal tract when consumed as part of complex foods. This study aimed to evaluate how incorporation of whole-fat milk powder (CF), skimmed milk powder (CS), and whey protein powder (CW) into pasteurized cocoa beverages impacts the in vitro release of phenolic compounds throughout gastrointestinal digestion. The in

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Williamson, G., A. J. Day, G. W. Plumb, and D. Couteau. "Human metabolic pathways of dietary flavonoids and cinnamates." Biochemical Society Transactions 28, no. 2 (2000): 16–22. http://dx.doi.org/10.1042/bst0280016.

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Flavonoids and cinnamates are widespread phenolic secondary metabolites synthesized by plants for defensive purposes. Many foods and beverages contain high levels of phenolic compounds. Certain phenolics in the diet are particularly bio-active and have pronounced effects on mammalian cells. These effects, together with epidemiological studies and animal models, have led to the hypothesis that dietary phenolics contribute to the health benefits of a diet rich in fruit and vegetables. This paper examines the biochemistry of the uptake and metabolic route of two groups of plant phenolics, the fla

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Marilia De, M. Castro, and Diego Demarco. "Phenolic Compounds Produced by Secretory Structures in Plants: A Brief Review." Natural Product Communications 3, no. 8 (2008): 1934578X0800300. http://dx.doi.org/10.1177/1934578x0800300809.

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The purpose of this brief review has been to provide more recent data regarding the production of phenolic compounds by secretory structures. Although morphology and histochemistry of glands are well documented, meagre information concerning phenolics is available in the surveyed literature. Two major groups of glands are found regarding phenolic compounds synthesis: 1. secretory cells producing mainly phenolics, 2. secretory cells producing phenolics coupled with other compounds. In the former group, phenolic compounds remain in mature organs, and prevail in the material produced by epidermis

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Zhu, Lei, Chuan Zhan, Xinchu Yu, et al. "Extractions, Contents, Antioxidant Activities and Compositions of Free and Bound Phenols from Kidney Bean Seeds Represented by ‘Yikeshu’ Cultivar in Cold Region." Foods 13, no. 11 (2024): 1704. http://dx.doi.org/10.3390/foods13111704.

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To thoroughly understand the profile of phenolic phytochemicals in kidney bean seeds cultivated in a cold region, the extractions, contents, antioxidant activities, compositions of free and bound phenols in the seed coat and cotyledon, and also relevant color attributes, were investigated. The results indicated that ultrasound-assisted extraction was an efficient method for free phenols. The bound phenols in seed coat and cotyledon were released more efficiently by alkali-acid and acid-alkali sequential hydrolysis, respectively. Under the optimized extractions, total phenols (TPC), flavonoids

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BUJDOSÓ, Géza, Éva LENGYEL-KÓNYA, Mária BERKI, Anita VÉGH, Laurine KITHI, and Nóra ADÁNYI. "Effects of Green Husks of Hungarian-Bred Cultivars on Their Walnut Bacterial Blight Susceptivity." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Horticulture 81, no. 1 (2024): 22–30. http://dx.doi.org/10.15835/buasvmcn-hort:2023.0014.

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The Persian walnut (Juglans regia L.) is one of Central Europe's most grown nut trees. In the green husks of walnuts, among the most important bioactive compounds are phenolics (hydroxybenzoic acids, hydroxycinnamic acids, flavonoids, naphthoquinones), which play an important role in the plant defense mechanisms against stress caused by various pathogens e.g., Xanthomonas arboricola pv. juglandis, furthermore mentioned as Xaj. The study examined the full Hungarian walnut assortment to detect the difference in phenolic profiles of their green husk and the relationship between the concentration

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Djurdjević, L., M. Mitrović, P. Pavlović, S. Perišić, and M. Mačukanović-Jocić. "Total phenolics and phenolic acids content in low (Chrysopogon gryllus) and mediocre quality (Festuca vallesiaca) forage grasses of Deliblato Sands meadow-pasture communities in Serbia." Czech Journal of Animal Science 50, No. 2 (2011): 54–59. http://dx.doi.org/10.17221/3995-cjas.

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&nbsp;Chrysopogon gryllus and Festuca vallesiaca are components of a number of meadow-pasture communities in Serbia. We performed the analyses of phenolics that influence quality and digestibility of grasses to a great extent. Total phenolics were measured spectrophotometrically and phenolic acids by HPLC analysis. The aboveground parts of C. gryllus contained 10.6 mg/g whereas F. vallesiaca of 21.6 mg/g total phenolics. Bound phenolics dominated over free ones in both species. The content of both free and bound p-coumaric, ferulic, p-hydroxybenzoic and syringic acid was higher in C. gryll

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Gao, Huaqi, Meimei Guo, Liqin Wang, Cui Sun, and Lingxia Huang. "Identification and Antioxidant Capacity of Free and Bound Phenolics in Six Varieties of Mulberry Seeds Using UPLC-ESI-QTOF-MS/MS." Antioxidants 11, no. 9 (2022): 1764. http://dx.doi.org/10.3390/antiox11091764.

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Mulberry seeds are a byproduct of juice processing and may be an important resource for its abundant compounds. In this study, we analyzed the qualitative composition of free and bound phenolics from six varieties of mulberry seeds using UPLC-ESI-QTOF-MS/MS. Free phenolics (FPs) and bound phenolics (BPs) were measured using the Folin–Ciocalteu method; antioxidant capacity was determined by measuring 2,2-diphenyl-1-picrylhydrazyl radical-scavenging activity, using the ferric reducing antioxidant power assay. A total of 28 free and 11 bound phenolics were extracted and identified, wherein five f

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Aist, James R., and Herbert W. Israel. "Autofluorescent and ultraviolet-absorbing components in cell walls and papillae of barley coleoptiles and their relationship to disease resistance." Canadian Journal of Botany 64, no. 2 (1986): 266–72. http://dx.doi.org/10.1139/b86-039.

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Earlier studies showed that normal-size papillae induced in barley coleoptile epidermal cells by Erysiphe graminis f. sp. hordei were less effective in resisting fungal penetration attempts than were oversize papillae. To determine if a differential content of phenolic derivatives could account for this difference in resistance, we analyzed normal papillae and oversize papillae by histochemical, epifluorimetric, and ultraviolet-microspectrophotometric methods. Whereas the histochemical tests revealed phenolic derivatives only in oversize papillae, the autofluorescence and ultraviolet-absorptio

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Petreska, Jasmina, Marina Stefova, Federico Ferreres, et al. "Dietary Burden of Phenolics per Serving of “Mountain Tea” (Sideritis) from Macedonia and Correlation to Antioxidant Activity." Natural Product Communications 6, no. 9 (2011): 1934578X1100600. http://dx.doi.org/10.1177/1934578x1100600924.

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This work was afforded from 2 points of view, phytochemical evaluation and relation to antioxidant activity and dietary burden of phenolics of a cup of “Mountain tea”, a drink obtained by domestic infusion of Sideritis. Phytochemically, two extraction protocols using water and methanol as solvent were used for comparison. Methanol and boiling water extracts (by domestic infusion procedure) showed that extracts were rich in bound forms of phenolics such as hydroxycinnamic acids, phenylethanoid glycosides and flavonoid glycosides. The total phenolic content for Sideritis species ranged around 19

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Hu, Xiaoping, Yuting Chen, Jincheng Dai, Linling Yao, and Lu Wang. "Rhodomyrtus tomentosa Fruits in Two Ripening Stages: Chemical Compositions, Antioxidant Capacity and Digestive Enzymes Inhibitory Activity." Antioxidants 11, no. 7 (2022): 1390. http://dx.doi.org/10.3390/antiox11071390.

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Rhodomyrtus tomentosa fruit (RTF) has been known as a food source with multiple health-care components. In this work, nutrition characteristics, free and bound phenolic profiles, antioxidant properties in vitro and digestive enzymes inhibitory activities of un-fully mature RTF (UM-RTF) and fully mature RTF (FM-RTF) were evaluated for the first time. Results verified that high levels of energy, ascorbic acid, organic acids and total phenolics were observed in FM-RTF. Moreover, FM-RTF had significant higher total phenolic content (TPC), but significantly lower total flavonoid content (TFC) than

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Verma, Rajesh Chandra, Patel Harsh Jitendrakumar, Ashoka P., et al. "A Review of Millet Grain Phenolics, their Health Promotion and Disease Risk Reduction." International Journal of Plant & Soil Science 35, no. 20 (2023): 863–74. http://dx.doi.org/10.9734/ijpss/2023/v35i203878.

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Millet, an often-overlooked cereal grain, has recently garnered attention due to its rich store of health-promoting phenolic compounds. This comprehensive review delves into the myriad facets of millet phenolics, from their extraction and analysis to their implications for health and disease risk reduction. The varied methodologies for phenolic extraction, including solvent, enzymatic, and ultrasound-assisted techniques, have their own merits and limitations. Advanced analytical tools such as High Performance Liquid Chromatography and Mass Spectrometry have enabled the identification of specif

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Kut, Kacper, Anna Tama, Paulina Furdak, Grzegorz Bartosz, and Izabela Sadowska-Bartosz. "Generation of Hydrogen Peroxide and Phenolic Content in Plant-Material-Based Beverages and Spices." Processes 12, no. 1 (2024): 166. http://dx.doi.org/10.3390/pr12010166.

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Phenolics are the main components of plant extracts contributing to their antioxidant activity. However, they autoxidize, generating hydrogen peroxide. This study aimed to examine the correlation between the phenolic content, total antioxidant capacity (TAC), and the amount of H2O2 generated in extracts of 18 various plant materials. A significant correlation was found between the phenolic content and TAC measured by ABTS● decolorization, CUPRAC, FRAP, and DPPH● decolorization methods (correlation coefficients r of 0.94, 0.93, 0.90, and 0.78, respectively). However, the correlation between the

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Zhu, Chen, Osbert Chou, Fung Ying Lee, et al. "Characterization of Phenolics in Rejected Kiwifruit and Their Antioxidant Potential." Processes 9, no. 5 (2021): 781. http://dx.doi.org/10.3390/pr9050781.

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Kiwifruit hold significant nutritional value and are a good source of antioxidants due to their diverse range of bioactive compounds. Kiwifruit waste is generated throughout the food supply chain, particularly during transportation and storage. Kiwifruit rejected from the retail market due to unfavorable appearance still possess potential economic value as kiwifruit are abundant in phenolic compounds. The present work studied the phenolic profile and antioxidant potential of rejected kiwifruit, including SunGold (Actinidia chinensis), Hayward (Actinidia deliciosa), and round organic Hayward (A

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MENCIN, Marjeta. "Biotehnološki procesi kot sredstvo za povečanje dostopnosti in antioksidativne aktivnosti fenolnih spojin iz zrn krušne pšenice in pire." Acta agriculturae Slovenica 120, no. 2 (2024): 1–10. http://dx.doi.org/10.14720/aas.2024.120.2.17019.

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Cereal grains, especially bran, are a rich source of phenolic compounds with antioxidant activity. The potential positive effects of phenolics from whole grains of spelt and bread wheat on human health are limited by the poor bioaccessibility and bioavailability of their bound phenolics. Studies have shown that biotechnological processes (germination/fermentation/enzymatic treatment) are an effective strategy for improving the release of bound phenolics from the cell wall matrix of cereal grains. In this review article, the effects of biotechnological processes on the composition, antioxidant

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Sawicki, Tomasz, Monika Jabłońska, Anna Danielewicz, and Katarzyna E. Przybyłowicz. "Phenolic Compounds Profile and Antioxidant Capacity of Plant-Based Protein Supplements." Molecules 29, no. 9 (2024): 2101. http://dx.doi.org/10.3390/molecules29092101.

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The study aimed to determine the phenolic content and antioxidant capacity of five protein supplements of plant origin. The content and profile of phenolics were determined using the UHPLC-DAD-MS method, while antioxidant capacity (ABTS and DPPH assays) and total phenolic content (TPC) were evaluated using spectrophotometric tests. In the analyzed proteins, twenty-five polyphenols were detected, including eleven phenolic acids, thirteen flavonoids, and one ellagitannin. Hemp protein revealed the highest individual phenolics content and TPC value (1620 μg/g and 1.79 mg GAE/g, respectively). Als

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Abraham Sisein Eboh, Faith Owabhel Robert, and Wodu Ebizimor. "Phenolics and phytochemicals in methanolic extract of Peperomia pellucidia quantified by HPLC." Open Access Research Journal of Life Sciences 3, no. 2 (2022): 059–62. http://dx.doi.org/10.53022/oarjls.2022.3.2.0045.

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Phenolics are compounds that contributed greatly to the healing potentials of many herbs, spices and plants of which Peperomia pellucidia is inclusive. This research aimed at determining the various phenolics present in the methanolic extract of Peperomia pellucidia extract. High performance liquid chromatography was used to analyse the phenolic content in Peperomia pellucidia extract. The result showed the presence of phenols and flavonoid quantified as total phenol 12.78 ± 2.70 mg GAE/g dry extract and total flavonoid as 10.97 ± 0.00 mg QE/g dry extract. HPLC result reveals the following phe

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Rodríguez-Romero, Manuela, Alejandro Gallardo, and Fernando Pulido. "Geographical and within-population variation of constitutive chemical defences in a Mediterranean oak (Quercus ilex)." Forest Systems 29, no. 2 (2020): e011. http://dx.doi.org/10.5424/fs/2020292-16943.

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Aim of study: to assess whether constitutive levels of total phenols and condensed tannins acting as chemical defences in Quercus ilex vary across regions, populations and genotypes.Area of study: acorns from six Spanish regions with natural presence of Q. ilex were collected for later sowing in the greenhouse of the University of Extremadura at Plasencia, western Spain.Materials and methods: 1176 acorns from 12 populations (2 per region) were sown according to a nested design (6 regions x 2 populations/region x 7 genotypes/population). After five months, 588 emerged seedlings were harvested f

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Prohens, Jaime, Adrián Rodríguez-Burruezo, María Dolores Raigón, and Fernando Nuez. "Total Phenolic Concentration and Browning Susceptibility in a Collection of Different Varietal Types and Hybrids of Eggplant: Implications for Breeding for Higher Nutritional Quality and Reduced Browning." Journal of the American Society for Horticultural Science 132, no. 5 (2007): 638–46. http://dx.doi.org/10.21273/jashs.132.5.638.

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Phenolic compounds have numerous beneficial effects on human health. In consequence, the development of new varieties with higher content of phenolics is of interest for the improvement of the nutritional quality of eggplant (Solanum melongena L.). However, the oxidation of eggplant phenolics causes browning of the cut surfaces of the fruit and reduces its apparent quality. The authors investigated the relationship among, as well as the variation and heritability of, the content of phenolics, ascorbic acid, and soluble solids; pH; and the degree of browning and color difference of the cut surf

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Myrtsi, Eleni D., Sofia D. Koulocheri, Vassilios Iliopoulos, and Serkos A. Haroutounian. "High-Throughput Quantification of 32 Bioactive Antioxidant Phenolic Compounds in Grapes, Wines and Vinification Byproducts by LC–MS/MS." Antioxidants 10, no. 8 (2021): 1174. http://dx.doi.org/10.3390/antiox10081174.

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The well-established, health-benefitting effects of grapevines and derivatives (wines and vinification byproducts) are attributed to their antioxidant phenolic content. The dearth of an efficient method for the simultaneous quantitation of antioxidant phenolics prompted us to develop a novel method utilizing triple quadrupole LC–MS/MS for the accurate, fast, simultaneous quantitation of the 32 most abundant grapevine phenolics. The fully validated, novel method is capable to simultaneously record the quantitative presence of 12 phenolic acids, 19 polyphenols and coniferyl aldehyde (a phenolic

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Ramadoss, Peera Priya, and Kirubanandan Shanmugam. "Evaluation of Phytochemical Analysis and Total Phenol Content of Proso Millet and Barnyard Millet." Proceedings of Anticancer Research 8, no. 2 (2024): 13–19. http://dx.doi.org/10.26689/par.v8i2.5329.

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Whole grains of proso and barnyard millets were sequentially extracted using different solvents (hexane, chloroform, ethyl acetate, and methanol). Phytochemical analysis was performed qualitatively, and the total phenolic content in the extracts of proso and barnyard millets was quantified. Alkaloids and cardiac glycosides were identified in all solvent extracts of both millets. Anthraquinone and glycosides yielded negative results in all solvent extracts of both millets. Among all the solvent extracts, methanol extracts of proso and barnyard millets showed the presence of major compounds such

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Levizou, E., and Y. Manetas. "Spectrophotometric assessment of leaf UV-B absorbing compounds and chemically determined total phenolic levels are strongly correlated." Canadian Journal of Botany 80, no. 6 (2002): 690–94. http://dx.doi.org/10.1139/b02-050.

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Investigations concerning the two major ecological roles of phenolics use different methods to quantify these compounds (phenolics as antiherbivores, Folin-Ciocalteu chemical assay; phenolics as UV-B screening pigments, UV-B absorbance). Yet, comparisons of the corresponding results are not possible, since an empirical correlation between the two methods is lacking. In the present study, significant regressions between total phenolic levels (chemically determined with the Folin-Ciocalteu method) and leaf UV-B absorbing capacity (assessed from simple absorbance measurements of methanolic extrac

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Sombutsuwan, Piraporn, Erwann Durand, and Kornkanok Aryusuk. "Effect of acidity/alkalinity of deep eutectic solvents on the extraction profiles of phenolics and biomolecules in defatted rice bran extract." PeerJ Analytical Chemistry 6 (January 3, 2024): e29. http://dx.doi.org/10.7717/peerj-achem.29.

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This study investigated the influence of deep eutectic solvent (DES) acidity/alkalinity on the extraction profiles of phenolics and other biomolecules (phytic acid, reducing sugar, and protein) in defatted rice bran (DFRB). The DES with varying pH levels were prepared using different hydrogen bond acceptors (choline chloride (ChCl) and potassium carbonate (K2CO3)) and hydrogen bond donors (lactic acid, urea, and glycerol). The results reveal that the acidic DES (ChCl-lactic acid; pH 0.42) demonstrated superior extraction efficiency for total phenolic acids (4.33 mg/g), phytic acid (50.30 mg/g)

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Dong, Shiyu, Lixin Ding, Xiuqing Zheng, Ou Wang, and Shengbao Cai. "Phenolic Compositions of Different Fractions from Coffee Silver Skin and Their Antioxidant Activities and Inhibition towards Carbohydrate-Digesting Enzymes." Foods 13, no. 19 (2024): 3083. http://dx.doi.org/10.3390/foods13193083.

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Seeking food-derived antioxidants and inhibitors of α-glucosidase and α-amylase has been recognized as an effective way for managing diabetes. Coffee silver skin (CSS) is rich in phenolic compounds, which may be potential agents as antioxidants and for α-glucosidase and α-amylase inhibition. But whether phenolics in different forms show similar bioactivity remains unknown. In this study, phenolic compounds in CSS were extracted as free phenolics (FPs), esterified phenolics (EPs), and bound phenolics (BPs). The phenolic profiles and antioxidant activities of them were investigated. Their inhibi

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Şengül-Binat, Hafizenur, and Ayşegül Kırca Toklucu. "Effect of peeling, filling medium, and storage on the antioxidant activity and phenolic compounds of canned figs (Ficus carica L.)." International Food Research Journal 30, no. 6 (2023): 1421–36. http://dx.doi.org/10.47836/ifrj.30.6.06.

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The fig fruit, which has a short seasonal availability due to its perishable nature, was subjected to a canning process, and the effects of canning on phenolics and antioxidant properties were evaluated. For this purpose, the most popular fig varieties grown in Türkiye, namely Sarilop (yellow coloured) and Bursa Siyahi (dark purple coloured), were canned in different filling mediums such as syrup, water, and fig juice, as peeled or unpeeled. The canned figs were also stored at room temperature for 12 months, and the changes in phenolics and antioxidant properties during storage were determined

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