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Journal articles on the topic 'Phenolic antioxidant'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Gan, Ren-You, Wing-Yee Lui, Ming-Fu Wang, Harold Corke, and Zhong-Quan Sui. "Accumulation of solvent-soluble and solvent-insoluble antioxidant phenolics in edible bean sprouts: implication of germination." Functional Foods in Health and Disease 6, no. 8 (2016): 519. http://dx.doi.org/10.31989/ffhd.v6i8.273.

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Background: Edible bean sprouts are popular fresh vegetables widely recognized for their nutritional quality. However, while their antioxidant capacity and phenolic composition in both solvent-soluble and solvent-insoluble extracts has not been systematically evaluated. Methods: The antioxidant capacity and phenolic composition in both solvent-soluble and solvent-insoluble fractions of 12 cultivars of edible bean sprouts were evaluated, and relationships of antioxidant capacity and total phenolic content were also analyzed. Results: Sprouts demonstrated a wide range of antioxidant capacity and

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2

Seneviratne, K. N., and R. T. Kotuwegedara. "Antioxidant Activities of the Phenolic Extracts of Seed Oils and Seed Hulls of Five Plant Species." Food Science and Technology International 15, no. 5 (2009): 419–25. http://dx.doi.org/10.1177/1082013209352718.

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Antioxidant activities of the phenolic extracts of seed oils and seed hulls of five plant species were compared with those of butylated hydroxyl toluene (BHT) solutions at comparable phenolic concentrations in order to understand the phenolic dependence of the antioxidant activity and to evaluate the potentials of these phenolic extracts as alternatives for synthetic antioxidants. For this purpose, colorimetrically determined total phenol contents of the plant extracts were adjusted to known concentrations by suitable dilutions and the solutions of BHT with comparable concentrations were prepa

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3

Liu, Yihan, Sanaa Ragaee, Massimo F. Marcone, and El-Sayed M. Abdel-Aal. "Composition of Phenolic Acids and Antioxidant Properties of Selected Pulses Cooked with Different Heating Conditions." Foods 9, no. 7 (2020): 908. http://dx.doi.org/10.3390/foods9070908.

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Pulses are recommended for healthy eating due to their high content of nutrients and bioactive compounds that can undergo changes during cooking. This study investigated the effects of four cooking methods (boiling, pressure, microwave, slow) and three heating solutions (water, salt, sugar) on the phenolic acids and antioxidant properties of three pulses (faba beans, lentils, peas). The composition of phenolic acids differed among the three pulses with p-coumaric and ferulic being the dominant acids. Cooking increased free phenolic acids and lessened bound phenolic acids in faba beans and peas

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4

Tusevski, Oliver, Aneta Kostovska, Ana Iloska, Ljubica Trajkovska, and Sonja Simic. "Phenolic production and antioxidant properties of some Macedonian medicinal plants." Open Life Sciences 9, no. 9 (2014): 888–900. http://dx.doi.org/10.2478/s11535-014-0322-1.

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AbstractInvestigations have been made to study the production of phenolic compounds (total phenolics, flavonoids and phenylpropanoids) and total antioxidant capacity in 27 Macedonian traditional medicinal plants to improve its potential as a source of natural antioxidants. Antioxidant potential of plant extracts was analyzed by five different assays: cupric reducing antioxidant capacity (CUPRAC), phosphomolybdenum method (PM), reducing power (RP), 2,2-diphenyl-1-picrylhydrazyl (DPPH·) and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS·+) radical scavenging activity. Origanum vulga

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5

Yang, Qiong-Qiong, Lin Cheng, Zhi-Yuan Long, et al. "Comparison of the Phenolic Profiles of Soaked and Germinated Peanut Cultivars via UPLC-QTOF-MS." Antioxidants 8, no. 2 (2019): 47. http://dx.doi.org/10.3390/antiox8020047.

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Diverse peanut varieties are widely cultivated in China. However, few studies have investigated the effects of germination on the phenolic profiles and antioxidant activities of specific Chinese peanut cultivars. Therefore, this study was conducted to evaluate the effects of germination on total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity, and phenolic profiles of seven peanut cultivars in China. The TPC, TFC, and antioxidant activities were determined by spectrophotometry, while phenolic profiles were analyzed by using ultra-high performance liquid chromatograp

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Howell, A., W. Kalt, J. C. Duy, C. F. Forney, and J. E. McDonald. "Horticultural Factors Affecting Antioxidant Capacity of Blueberries and other Small Fruit." HortTechnology 11, no. 4 (2001): 523–28. http://dx.doi.org/10.21273/horttech.11.4.523.

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It is now widely held that the antioxidants contained in fruit and vegetables can provide protection against certain human degenerative conditions that are associated with oxygen free radical damage. This view is supported by epidemiological, in vitro, and more recently, in vivo evidence. Phenolics (polyphenolics) contribute substantially to the antioxidant complement of many small fruit species whose ripe fruit are red, purple or blue in color. Fruit containing high levels of phenolic antioxidants would be attractive to health conscious consumers, therefore optimization of production and proc

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Zulaica-Villagomez, Hilda, David M. Peterson, Lauri Herrin, and Raymond A. Young. "Antioxidant activity of different components of pine species." Holzforschung 59, no. 2 (2005): 156–62. http://dx.doi.org/10.1515/hf.2005.024.

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Abstract The total phenolic content and antioxidant activity of extracts from pine species were evaluated for various plant components, with emphasis on the seed cones. Seed cones from pine species were found to contain relatively high amounts of both total phenolics and antioxidant activity, and there appears to be some correlation of the two measurements. Juvenile cones contained by far the highest phenolic and antioxidant activity, but this high activity appears to be related to seeds retained in some of the samples, possibly due to the presence of proteins or additional antioxidants in the

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8

Nagarajan, Subhalakshmi, Ramaswamy Nagarajan, Jayant Kumar, et al. "Antioxidant Activity of Synthetic Polymers of Phenolic Compounds." Polymers 12, no. 8 (2020): 1646. http://dx.doi.org/10.3390/polym12081646.

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In recent years, developing potent antioxidants has been a very active area of research. In this context, phenolic compounds have been evaluated for their antioxidant activity. However, the use of phenolic compounds has also been limited by poor antioxidant activity in several in vivo studies. Polymeric phenols have received much attention owing to their potent antioxidant properties and increased stability in aqueous systems. To be truly effective in biological applications, it is important that these polymers be synthesized using benign methods. In this context, enzyme catalyzed synthesis of

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9

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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Pereira, Juciane Abreu Ribeiro, Meryene Carvalho Teixeira, Adelir Aparecida Saczk, Maria de Fátima Piccolo Barcelos, Marcelo Firmino de Oliveira, and Wilson César de Abreu. "Total antioxidant activity of yacon tubers cultivated in Brazil." Ciência e Agrotecnologia 40, no. 5 (2016): 596–605. http://dx.doi.org/10.1590/1413-70542016405009416.

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ABSTRACT Yacon (Smallanthus sonchifolius) is a tuberous root from the Andean region in the South America rich em water, fructooligosaccharides and phenolic compounds, some of which are natural antioxidants and may help prevent the deleterious action of free radicals in the body. The yacon has attracted much attention due to their potential health benefits to humans. In this study the levels of total phenolics, tannins, phenolic acids, and total antioxidant activity were measured in the peel and pulp of yacon tubers both in the fresh and flour forms. The flours of yacon presented higher concent

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11

Borgohain, Romesh, Jyotirekha G. Handique, Ankur Kanti Guha, and Sanjay Pratihar. "A theoretical study on antioxidant activity of ferulic acid and its ester derivatives." Journal of Theoretical and Computational Chemistry 15, no. 04 (2016): 1650028. http://dx.doi.org/10.1142/s0219633616500280.

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Phenolic compounds play a very crucial role as antioxidant that can prevent various diseases caused by free radicals in human body. Although, lots of natural phenolic compounds having antioxidant activity are available nowadays, the modeling of compounds with naturally available phenolics as building blocks is very important in order to get enhanced antioxidant activity. In this study, Ferulic acid (FA), one natural phenolic acid present in coffee, apples, orange, etc., is taken as building block and its ester derivatives with different alkyl groups are subjected to measure the antioxidant act

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12

Tuyen, Phung Thi, Do Tan Khang, Luong The Minh, et al. "Phenolic Compounds and Antioxidant Activity of Castanopsis phuthoensis and Castanopsis grandicicatricata." International Letters of Natural Sciences 55 (June 2016): 77–87. http://dx.doi.org/10.18052/www.scipress.com/ilns.55.77.

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In this study, total phenolic, flavonoid contents, antioxidant capacity, and phenolic compositions of Castanopsis phuthoensis and Castanopsis grandicicatricata (Fagaceae family) were investigated. It was found that bark extracts were rich of phenolic contents, whereas leaf extracts were abundant of flavonoids. The total phenolics varied from 11.20 to 35.47 mg gallic acid equivalent g-1 dry weight (DW), and the total flavonoids were from 2.24 to 12.55 mg rutin equivalent g-1 DW. The results of antioxidant activity showed that the DPPH (1,1-diphenyl-2-picryl-hydrazyl) radical scavenging activity

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13

Zhu, Yi-Lin, Hai-Sheng Zhang, Xin-Shuai Zhao, Huan-Huan Xue, Jing Xue, and Yu-Han Sun. "Composition, Distribution, and Antioxidant Activity of Phenolic Compounds in 18 Soybean Cultivars." Journal of AOAC INTERNATIONAL 101, no. 2 (2018): 520–28. http://dx.doi.org/10.5740/jaoacint.17-0156.

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Abstract Natural phenols are an important functional compound widely distributed in plants with benefits that promote human health. The content of total phenols, flavonoids, and anthocyanins and their composition distribution in 18 soybean cultivars was investigated. There are four phenolic acid distribution forms in these soybean cultivars, namely free, esterified, glycosided, and insoluble-bound. Total phenols, flavonoids, and anthocyanins from 6 black soybean cultivars were found in higher numbers than those from 12 other yellow soybean cultivars. Free and esterified phenolic acids were the

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14

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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15

Kumar, Vikas, Kamal Dev, Anuradha Sourirajan, and Prem Kumar Khosla. "Comparative Antioxidant Potential of Bark and Leaves of Terminalia arjuna (Roxb) Wight & Arn from Himachal Pradesh." International Journal of Pharmaceutical and Phytopharmacological Research 6, no. 1 (2017): 27. http://dx.doi.org/10.24896/eijppr.2016615.

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The present study aimed to compare antioxidant activities, total phenolic and flavonoid content present in leaves and bark of Terminalia arjuna and check whether there is any correlation between phenolic content and flavonoid content with antioxidant activities or not. Phytochemical screening of ethanolic extract of leaves and bark revealed the presence of phenols, flavonoids, tannins, carbohydrates, glycosides, saponin, phytosterols and phytosteroids. Total phenolic content was found to be higher in bark (272.71±3.18 mg/g gallic acid equivalents) as compared to that of leaves (95±3.11 mg/g ga

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Khalid, Sumaira, Dr Asif Ahmad, and Muhammad Kaleem. "Antioxidant activity and phenolic contents of Ajwa date and their effect on lipo-protein profile." Functional Foods in Health and Disease 7, no. 6 (2017): 396. http://dx.doi.org/10.31989/ffhd.v7i6.337.

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Background: Date pits although being rich in phenolic and antioxidant content are neglected part and treated as waste product. Ethanobotanical records indicates potential of ajwa dates pits and flesh having phenolics, antioxidants and some other nutrients.Objective: The study was planned to extract the phenolic contents and antioxidant activity of ajwa date flesh and pits in comparison to local date varieties, in three different solvents with three different concentrations and to observe their effect on high lipo-protein profile of albino mice.Materials and Methods: Three solvents viz. Methano

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17

Fithri, Najma Annuria, Fitrya Fitrya, Tia Shabrina, and Diva Yulanri. "Antioxidant Activity Analysis and Standardization of Parkia speciosa (Petai) Pods Ethanol Extract." Science and Technology Indonesia 4, no. 1 (2019): 5. http://dx.doi.org/10.26554/sti.2019.4.1.5-10.

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Parkia speciosa (petai) pods are rarely used and considered as waste despite their phenolic and flavonoid content. Phenolic and flavonoid content in plants are known to exhibit antioxidant activity. Antioxidants are known to potentially act agains radical and mediate the damage by structural stabilization. This research was conducted to analyze the antioxidant potential of petai pods using DPPH method. Analysis showed the IC50 of petai pods ethanolic extract was 75.72 ppm, which indicate strong acting antioxidant. Standardization of extracts were determined to manage the quality of extract, in

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18

Najdi Hejazi, Sara, and Valerie Orsat. "Malting Process Effects on Antioxidant Activity of Finger Millet and Amaranth Grains." Journal of Food Research 5, no. 1 (2015): 1. http://dx.doi.org/10.5539/jfr.v5n1p1.

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Finger millet (Eleusine coracana) and amaranth (Amaranthus caudatus) are two nutritious and gluten-free grains with high contents of phenolic compounds. Phenols are known as the main source of antioxidants, with numerous health benefits. Being rich in phenol makes these grains good choices for the functional food industry. In this study, the effects of malting/germination factors, duration and temperature, on the phenolic content and antioxidant activities of these grains are thoroughly investigated and optimized. Based on a central composite design, the grains were germinated for 24, 36, and

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19

Darikvand, Farzaneh, Mehrdad Ghavami, and Masoud Honarvar. "Determination of the Phenolic Content in Iranian Trehala Manna and Evaluation of Their Antioxidant Effects." Evidence-Based Complementary and Alternative Medicine 2021 (August 31, 2021): 1–8. http://dx.doi.org/10.1155/2021/8570162.

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One of the most challenging issues in the food and pharmaceutical industries is finding effective and safe antioxidants from natural resources compared to their synthetic compounds, which have side effects. In this regard, Trehala manna was considered a great antioxidant source categorized as the major type of manna produced naturally and by the Echinops plant in response to insect activity. In this study, the antioxidant activity and phenolic content of the numerous Trehala manna in Echinops sp. have been investigated. Different methods of radical scavenging activity comprising 2,2′-azino-bis

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Boumaiza, Raouia, Ahmed Snoussi, Tania Cirkovic-Velickovic, and Nabiha Bouzouita. "Phenolic composition and antioxidant activity of different parts of pistacia vera L." Mediterranean Journal of Chemistry 6, no. 1 (2016): 658–64. http://dx.doi.org/10.13171/mjc61/0160920510-rb.

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Phenolic compounds are widely distributed in almost all higher plants and are present in different tissues. The quality and quantity of phenolics are used as criteria for variety identification. The present study has been planned to determine the phenolic composition of Pistacia vera. Total phenolic content and concentration of flavonoids of eight different extracts, from the floral buds and leaves of Pistacia vera. (Anacardiaceae) were determined using spectrophotometric methods. The total phenolic content ranged from 401.64 to 513.77 (mg GAE/g DW). The total flavonoid concentrations varied f

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21

Zuorro, Antonio, Annalaura Iannone, and Roberto Lavecchia. "Water–Organic Solvent Extraction of Phenolic Antioxidants from Brewers’ Spent Grain." Processes 7, no. 3 (2019): 126. http://dx.doi.org/10.3390/pr7030126.

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Brewers’ spent grain (BSG) is the most abundant by-product of the brewing process. BSG is currently disposed of or used as a supplement for animal feed, although it contains significant amounts of bioactive compounds of great interest to the pharmaceutical, cosmetic and food sectors. In this study we investigate the feasibility of using a simple solvent extraction procedure to recover phenolic antioxidants from BSG. Acetone–water and ethanol–water mixtures were used as extraction solvents. Phenolic extracts obtained by treatment of BSG with the two solvent systems were characterized in terms o

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Zhang, Gui Zhi, Bao Ping Ji, and Gang Chen. "Antioxidant Activities and Phenolic Composition of Apple Peel, Core and Flesh Extracts on Selected Apple Cultivars." Advanced Materials Research 554-556 (July 2012): 1103–9. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.1103.

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Phenolic antioxidants have multiple benefits to human health. Polyphenols are responsible for the antioxidant activity in apples. Antioxidant activities were assessed using the ferric reducing/antioxidant power (FRAP) and 2,2-dipheny l-1-picrylhydrazyl (DPPH) radical scavenging assays in different cultivars and different parts of apples grown in China. The phenolic compounds and antioxidant activities differed significantly among the four apple cultivars. Guoguang had the highest phenolic concentration and antioxidant activity and Golden Delicious had the lowest. The peels had the highest tota

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Bajpai, Monika, Madhusudan S, and Sibi G. "Standardized method to extract phenolic compounds from Lagerstroemia speciosa L. (Jarul) for enhanced antioxidant activity." Journal of Applied and Natural Science 13, no. 3 (2021): 1041–47. http://dx.doi.org/10.31018/jans.v13i3.2870.

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Phenolic compounds contribute to the antioxidant property of plants and the efficient extraction of plant phenolics could enhance its antioxidant potential. Lagerstroemia speciosa (L.) Pers. has been investigated for its pharmacological activities, but comparing its antioxidant activities of phenolics derived from its various parts has a key role in developing natural antioxidants. This study was conducted to standardize the extraction of phenolics from leaves, pods and branches of L. speciosa plant, followed by determination of antioxidant activities of their solvent fractions. Phenolic compo

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Reddivari, Lavanya, and J. Creighton Miller. "IDENTIFICATION OF COMPOUNDS CONTRIBUTING TO ANTIOXIDANT ACTIVITY IN SPECIALTY POTATOES (Solanum tuberosum L.)." HortScience 40, no. 3 (2005): 873f—874. http://dx.doi.org/10.21273/hortsci.40.3.873f.

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Antioxidants have been widely reported to play an important role in disease prevention. In addition to preventing cancer, stroke, heart diseases, and inflammation, they are also involved in immune surveillance. Since the per capita consumption of potatoes in the U.S. is about 137 lb, even moderate levels of antioxidants in this most important vegetable crop probably have an important human health benefit. About 75% to 80% of antioxidant activity in specialty potatoes is due to phenolics and carotenoids. The objectives of this investigation were to evaluate antioxidant activity and total phenol

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Pokorný, J., Š. Schmidt, and H. T T Nguyen. "Functionality changes of natural antioxidants during food processing and storage." Czech Journal of Food Sciences 22, SI - Chem. Reactions in Foods V (2004): S80—S83. http://dx.doi.org/10.17221/10617-cjfs.

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Food raw materials and products contain inhibitors of oxidation reactions, both in the lipidic phase and the aqueous phase. The most important inhibitors are phenolic antioxidants. During food processing and storage, concentrations of antioxidants in the two phases reach an equilibrium. Phenolics react with lipidic free radicals, being converted into antioxidant free radicals, quinones, polymers and copolymers. Some degradation products possess an antioxidant activity, too. The relative antioxidant activity decreases with decreasing concentration of oxygen in the system and with increasing tem

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Rybiński, Wojciech, Magdalena Karamać, Katarzyna Sulewska, Andreas Börner, and Ryszard Amarowicz. "Antioxidant Potential of Grass Pea Seeds from European Countries." Foods 7, no. 9 (2018): 142. http://dx.doi.org/10.3390/foods7090142.

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Phenolic compounds were extracted from seeds of 30 varieties of grass pea (Lathyrus sativus) into 80% (v/v) methanol. The total phenolics compounds content of the extracts and their antioxidant activity were determined using Folin-Ciocalteu’s phenol reagent and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and ferric-reducing antioxidant power (FRAP) methods, respectively. Total phenolic contents ranged from 1.88 to 7.12 mg/g extract and 20.3 to 70.3 mg/100 g seeds. The extracts and seeds were characterized using Trolox equivalent antioxidant capacity values of 0.015–0.037 mmol

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Pérez-Álvarez, Eva P., Diego S. Intrigliolo, María Pilar Almajano, Pilar Rubio-Bretón, and Teresa Garde-Cerdán. "Effects of Water Deficit Irrigation on Phenolic Composition and Antioxidant Activity of Monastrell Grapes under Semiarid Conditions." Antioxidants 10, no. 8 (2021): 1301. http://dx.doi.org/10.3390/antiox10081301.

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The high phenolic compound content of grapes makes them an important source of natural antioxidants, among other beneficial health properties. Vineyard irrigation might affect berry composition and quality. Regulated deficit irrigation (RDI) is a widely used strategy to reduce the possible negative impact of irrigation on grapes, improving grape composition and resulting in water savings. Monastrell grapevines (Vitis vinifera L.) grown in eastern Spain were subjected to two water regime strategies: rainfed (non-irrigation) and RDI. The content of anthocyanins, flavonols, flavanols, hydroxybenz

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S.B. Capezio, L. M. Garcia-Procaccini;. "Use of antioxidants in minimally processed potato." Revista Latinoamericana de la Papa 23, no. 2 (2020): 28–38. http://dx.doi.org/10.37066/ralap.v23i2.366.

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Potato (Solanum tuberosum L.) is a vegetable with an important nutritional value that can be marketed as minimally processed. The life of these products is reduced by enzymatic browning. The high concentration of phenolic compounds gives antioxidant activity, while they are substrates for the enzymes responsible for enzymatic browning. The objective of this work was to analyze the total phenol content and the enzymatic browning of minimally processed products of three potato varieties using an antioxidant treatment (ascorbic acid and citric acid) and a control treatment, during 15 days of stor

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Słowianek, Marta, and Joanna Leszczyńska. "Antioxidant properties of selected culinary spices." Herba Polonica 62, no. 1 (2016): 29–41. http://dx.doi.org/10.1515/hepo-2016-0003.

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SummaryIntroduction: Seasonings added to food enhance its flavor and texture. Some of them can also extend their shelf-lives thanks to the presence of antioxidant compounds. Objective: The aim of the study was to investigate twenty eight commercially available spices for the total phenolic contents and antioxidant activity. Methods: Total phenols were estimated according to the Folin-Ciocalteu method. Antioxidant activities of the extracts were determined with DPPH assay. Results: Our results showed that the most of analysed spices are rich in phenolic compounds and demonstrate good antioxidan

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Karamać, Magdalena, Francesco Gai, Erica Longato, et al. "Antioxidant Activity and Phenolic Composition of Amaranth (Amaranthus caudatus) during Plant Growth." Antioxidants 8, no. 6 (2019): 173. http://dx.doi.org/10.3390/antiox8060173.

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The antioxidant activity and phenolic composition of the aerial part of Amaranthus caudatus at seven stages of development were investigated. Total phenolic content, ABTS•+, DPPH•, and O2•− scavenging activity, ferric-reducing antioxidant power (FRAP), and Fe2+ chelating ability were evaluated. The phenolic profile was characterized by 17 compounds. Rutin was predominant in all growth stages, although its content, similar to the quantity of other phenolics, changed during the growth cycle. Flavonols were most abundant in the plants of early flowering and grain fill stages. In contrast, the hig

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Krpan, M., K. Marković, G. Šarić, B. Skoko, M. Hruškar, and N. Vahčić. "Antioxidant Activities and Total Phenolics of Acacia Honey." Czech Journal of Food Sciences 27, Special Issue 1 (2009): S245—S247. http://dx.doi.org/10.17221/1112-cjfs.

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The antioxidant activities and total phenolic content of 30 samples of acacia honey from Croatian territory were analysed. Phenolics were determined by the modified Folin-Ciocalteu method, antiradical activity by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method and potential antioxidant activity using the ferric reducing antioxidant power (FRAP) method. In all samples, physicochemical parameters (water content, electrical conductivity, total reducing sugars, sucrose content, acidity, hydroxymethylfurfural content, prolin content, optical rotation, diastase activity and invertase activity) were

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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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POPA, GABRIELA, RADU TOMA, and JEAN-FRANÇOIS BOÉ. "Experimental approaches targeting the biochemical and antioxidant potential of Synsepalum dulcificum dried fruits." Romanian Biotechnological Letters 26, no. 1 (2021): 2230–35. http://dx.doi.org/10.25083/rbl/26.1/2230.2235.

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This study aimed to investigate the biochemical content and antioxidant activity of methanol extracts prepared from Synsepalum dulcificum dried fruits. The results obtained by phytochemical screening of the extracts revealed the presence of some pharmacologically active chemical compounds such as: alkaloids, flavonoids, phenolic compounds and tannins. Quantitative analysis showed that the seeds had phenols in greater amounts (157.88 ± 2.09 mg GAE / g dry matter) than dried fruit pulp (54.09 ± 2.24 mg GAE / g dry matter). Contrariwise, flavonoid content was found to be low in seed (0.013 ± 0.02

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Kha, Tuyen C. "Total phenolic content and antioxidant activity of sesame cake aqueous extracts." Journal of Agriculture and Development 17, no. 06 (2018): 77–84. http://dx.doi.org/10.52997/jad.10.06.2018.

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The objective of this study was to investigate the efficiency of phenolic extraction and antioxidant activity from sesame cake using water extraction method and to evaluate the possibility of employing microwave irradiation to improve the extraction yield. The result showed that extraction temperature had major influence on total phenolic content and antioxidant activities of the extracts, whereas extraction time was found to be insignificant. The optimum extraction condition recommended were 90oC for 30 min in this research. Furthermore, microwave pre-treatment at 120 s could have significant

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Falcinelli, Beatrice, Franco Famiani, Andrea Paoletti, et al. "Phenolic Compounds and Antioxidant Activity of Sprouts from Seeds of Citrus Species." Agriculture 10, no. 2 (2020): 33. http://dx.doi.org/10.3390/agriculture10020033.

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Seeds from Citrus species represent a relevant by-product of the juice industry and a potential source of bioactive compounds such as phenols and other antioxidants. Sprouting could be an intriguing idea to enhance the content of these compounds, as explored for other fruittree species. In this experiment, the sprouting performance, the concentration of total phenols and phenolic acids, and the antioxidant activity of seeds and sprouts were evaluated for bitter orange (Citrus aurantium L. seedlings), blonde orange (Citrus sinensis (L.) Osbeck cv.Biondocomune), sweet orange (Citrus sinensis (L.

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Nasr, Alyaa, Xinxin Zhou, Tingting Liu, Jing Yang, and Guo-Ping Zhu. "Acetone-water mixture is a competent solvent to extract phenolics and antioxidants from four organs of Eucalyptus camaldulensis." Turkish Journal of Biochemistry 44, no. 3 (2019): 231–39. http://dx.doi.org/10.1515/tjb-2018-0438.

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Abstract Objective Eucalyptus camaldulensis is recognized to be one of the major introduced eucalypts, the plant extracts possess a wide range of phytochemicals, which are accountable for its antioxidant and pharmacological activities. The extraction efficiency of such chemical compounds is influenced by the applied extraction conditions. To test the effect of solvent type on the yield of phenolics and antioxidants from E. camaldulensis, seeking for an optimization of the extraction process. Method Dry powders of four plant organs were extracted by some organic solvents besides water. The tota

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Junthip, Rattanabhorn, Doungporn Amornlerdpison, and Thitiphan Chimsook. "Phytochemical Screening, Antioxidant Activity and Total Phenolic Content of Spirogyra spp." Advanced Materials Research 699 (May 2013): 693–97. http://dx.doi.org/10.4028/www.scientific.net/amr.699.693.

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A freshwater macroalga, Spirogyra spp., were analyzed for its phytochemical composition, antioxidant activity and total phenolic content (Folin−Ciocalteu method). Phytochemical analysis of Spirogyra neglecta revealed presence of phenolics, tannins, glycosides and saponins. The crude extraction of Spirogyra spp. was carried out using two solvents via, methanol (methanolic extract) and water (aqueous extract). The total phenolic contents of crude extracts were shown at 346.58±1.61 and 589.77±1.65 mg gallic acid equivalents/g extract in aqueous and methanolic extracts, respectively. The antioxida

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Martic, Sanela. "Phenolic Antioxidants: Redox Properties and Antioxidant Activities." ECS Meeting Abstracts MA2020-01, no. 43 (2020): 2497. http://dx.doi.org/10.1149/ma2020-01432497mtgabs.

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Padda, Malkeet S., and D. H. Picha. "Antioxidant Activity and Phenolic Composition in ‘Beauregard’ Sweetpotato Are Affected by Root Size and Leaf Age." Journal of the American Society for Horticultural Science 132, no. 4 (2007): 447–51. http://dx.doi.org/10.21273/jashs.132.4.447.

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Phenolic acids are considered important antioxidants that may help to prevent many human chronic diseases. The antioxidant activity and phenolic content of sweetpotato [Ipomoea batatas (L.) Lam.] roots and leaves of different sizes and ages, respectively, were quantified. Small roots (≈4 g root weight) had a higher antioxidant activity and phenolic content compared with full-sized marketable roots (≈300 g root weight). Phenolic content in marketable roots was significantly higher in the cortex tissue than in the internal pith tissue. The highest total phenolic content [chlorogenic acid equival

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Alimpic, Ana, Mariana Oaldje, V. Matevski, P. D. Marin, and Sonja Duletic-Lausevic. "Antioxidant activity and total phenolic and flavonoid contents of Salvia amplexicaulis Lam. extracts." Archives of Biological Sciences 66, no. 1 (2014): 307–16. http://dx.doi.org/10.2298/abs1401307a.

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This study was designed to examine the in vitro antioxidant DPPH free radical-scavenging activity, and the total phenolic and flavonoid content of ethanol and methanol extracts of Salvia amplexicaulis Lam. in the whole plant and different parts, leaves, stems and flowers. The largest amounts of extract yield were obtained from the flowers, 14.14% and 12.00 % (w/w) in the ethanol of methanol extracts, respectively. The ethanol extract of leaves (16.07 ?g/ml) and methanol extract of the whole plant (21.28 ?g/ml) showed the highest activity against the DPPH radical. The ethanol extract of the lea

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Chaalal, Makhlouf, iham Ydjedd, and Sana Mansouri. "Phenolic compounds and antioxidant activity of different parts of three mandarin varieties extracts: A comparative study." North African Journal of Food and Nutrition Research 4, no. 8 (2020): 318–24. http://dx.doi.org/10.51745/najfnr.4.8.318-324.

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Background: Mandarin by-products, such as peels and seeds, are considered as one of the naturel source of phenolic compounds. Aim: The objective of the present study was to compare the phenolic compounds contents and antioxidant activity of different parts (pulps, seeds, juices, and peels) of three mandarins varieties extracts. Material and methods: Total phenolic, flavonoid, and proanthocyanidin contents of the extracts were assessed while, the antioxidant activity was evaluated using three tests including ferric reducing power, free radical scavenging activity, and phosphomolybdate. Results:

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Chaalal, Makhlouf, Siham Ydjedd, and Sana Mansouri. "Phenolic compounds and antioxidant activity of different parts of three mandarin varieties extracts: A comparative study." North African Journal of Food and Nutrition Research 4, no. 08 (2020): 318–24. http://dx.doi.org/10.51745/najfnr.4.08.318-324.

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Background: Mandarin by-products, such as peels and seeds, are considered as one of the naturel sources of phenolic compounds. Aim: The objective of the present study was to compare the phenolic compounds contents and antioxidant activity of different parts (pulps, seeds, juices, and peels) of three mandarins varieties extracts. Material and methods: Total phenolic, flavonoid, and proanthocyanidin contents of the extracts were assessed while, the antioxidant activity was evaluated using three tests including ferric reducing power, free radical scavenging activity, and phosphomolybdate. Results

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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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Khodami, Mojtaba, Neda Mohamadi, and Mehran Goodarzi. "Evaluation of the Antioxidant Capacity of the Various Extracts of Dracocephalum apolychaetum." International Journal of Life Sciences 9, no. 5 (2015): 31–34. http://dx.doi.org/10.3126/ijls.v9i5.12688.

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The purpose of this study was to evaluate the antioxidant effect, total phenolic content of the ethanol, methanol and aqueous extract Dracocephalum polychaetum in flowering stage. The total phenolic content of the plant was measured colorimetrically. Antioxidant capacity of the plant extract was evaluated by DPPH method. In the present study, the highest antioxidant effect was to the extract of methanol, ethanol and aqueous, respectively. IC50 values in extracts of ethanol, methanol and water were respectively 11.89, 8.07 and 24.04. This value was obtained 0.86 μg /ml for BHT. The maximum leve

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Amensour, Mahassine, Esther Sendra, Jamal Abrini, Samira Bouhdid, José Angel Pérez-Alvarez, and Juana Fernández-López. "Total Phenolic Content and Antioxidant Activity of Myrtle (Myrtus communis) Extracts." Natural Product Communications 4, no. 6 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400616.

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The total phenolic content and antioxidant activity of methanolic, ethanolic and aqueous extracts of myrtle ( Myrtus communis) leaves and berries were measured to find new potential sources of natural antioxidants. Total phenolic content was assessed by the Folin-Ciocalteau assay, while the antioxidant activity was evaluated by three methods: diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay, the reducing antioxidant power assay and β-carotene linoleic acid assay. The total phenol content of myrtle extracts ranged between 9.0 and 35.6 mg GAE per g extract. For each solvent, le

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Kumar, Dinesh, Milind S. Ladaniya, Manju Gurjar, Sunil Kumar, and Sachin Mendke. "Quantification of Flavonoids, Phenols and Antioxidant Potential from Dropped Citrus reticulata Blanco Fruits Influenced by Drying Techniques." Molecules 26, no. 14 (2021): 4159. http://dx.doi.org/10.3390/molecules26144159.

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Physiologically dropped immature Citrus reticulata Blanco fruits are regarded as waste and discarded in the citrus orchard but are a good source of bioactive compounds including flavonoids, antioxidants and total phenols. A study was undertaken to identify and quantify these bioactive compounds and to investigate the influence of different drying techniques, namely freeze drying and hot air oven drying, on flavonoids namely flavanone glycosides, antioxidant potential and total phenol content in immature dropped fruits of Citrus reticulata Blanco. Flavonoids were quantified in high-performance

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I., Norra, Saiful Bahri S., Hadijah H., and Norhartini A.S. "Effect of steaming and frozen storage on polyphenol content and antioxidant properties of Mangifera odorata (Kuini) pulp." Food Research 5, no. 1 (2021): 313–21. http://dx.doi.org/10.26656/fr.2017.5(1).219.

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Mangifera odorata (kuini) is a potential source of antioxidant. As a seasonal fruit and easily perishable after harvesting, production of kuini pulp was a common practice to overcome this problem. Steaming treatment were involved in the production of kuini pulp before being stored at -18°C. These thermal treatment and storage are challenging due to the fact that it can induce changes of antioxidants properties of kuini pulp. Thus, this study evaluated the effect of steaming processing and frozen storage on the total phenolic content (TPC) and antioxidant activity (AOA) measured by ferric reduc

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Frías-Zepeda, M. Estela, and Martha Rosales-Castro. "Effect of extraction conditions on the concentration of phenolic compounds in Mexican oregano (Lippia graveolens Kunth) residues." Revista Chapingo Serie Ciencias Forestales y del Ambiente 27, no. 3 (2021): 367–81. http://dx.doi.org/10.5154/r.rchscfa.2020.10.066.

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Introduction: Mexican oregano (Lippia graveolens Kunth) leaves are marketed for use in food and for essential oil extraction. Phenolic compounds with antioxidant properties can be obtained from the residues (leaves without oil and stems) under appropriate extraction conditions. Objective: To evaluate the effect of extraction solvent and mass/volume ratio on phenolic compounds concentration and their antioxidant capacity in oregano residues. Materials and methods: Residual leaf (without oil) and stems of oregano were used to obtain extracts with 30, 50 and 80 % aqueous ethanol (ET30, ET50, ET80

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Kalt, W., C. Lawand, and C. F. Forney. "036 Antioxidant Capacity and Anthocyanin and Phenolic Content of Highbush Blueberries of Different Maturities." HortScience 35, no. 3 (2000): 394C—394. http://dx.doi.org/10.21273/hortsci.35.3.394c.

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Highbush blueberry (Vaccinium corymbosum) fruit of the cultivars `Bergitta', `Bluegold', and `Nelson' were harvested at six stages of maturity and evaluated for their antioxidant capacity and anthocyanin and phenolic content. Fruit of the four earliest maturities were also stored at 20 °C for up to 8 days. At the time of harvest, fruit of different maturities had substantial differences in their anthocyanin content, and less marked differences in phenolic content and antioxidant capacity. Substantial anthocyanin synthesis occurred in under-ripe fruit during 20 °C storage, and varied depending

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Nilova, L. P., and S. M. Malyutenkova. "Antioxidant complexes of sea buckthorn (Hippopha? rhamnoides L.) of northwest Russia." Proceedings of the Voronezh State University of Engineering Technologies 83, no. 1 (2021): 108–14. http://dx.doi.org/10.20914/2310-1202-2021-1-108-114.

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Sea buckthorn fruits, due to the content of complexes of water- and fat-soluble antioxidants, have therapeutic and prophylactic properties. Their content depends on the species, subspecies, varieties, botanical varieties, ecological and geographical origin of sea buckthorn fruits. The paper presents the results of studies of the composition of antioxidants and antioxidant activity of three botanical varieties of sea buckthorn (Hippopha? rhamnoides L.) growing in the Leningrad region of the northwestern region of Russia. As part of the antioxidant complex, the content of phenolic antioxidants (

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