Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"total polyphenol"”.
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Impact of cocoa (Theobroma cacao L.) fermentation on composition and concentration of polyphenols: Development of fermentation model system and utilization of yeast starter cultures
… diabetes, obesity, and platelet disorders. Cocoa polyphenols, putatively responsible for these beneficial activities, are highly impacted by cocoa variety, agronomic effects and processing history. However, the difference in polyphenol concentration and composition between cocoa products …
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A comparative study of white, black and green tea solutions as potential antiviral agents in rhesus monkey kidney cells induced with porcine rotavirus
… conducted before virus inhibition experiments. Total polyphenol content, of each tea, was determined using Folin-Ciocalteu Method, with Gallic Acid (GA) as a standard in milligram equivalents to GA per milliliter. Total polyphenols were highest in Green Tea, 4.50 ± 0.58 mg GA equivalent/mL. …
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Determination of phytochemicals in vegetable juices and their effects on postprandial glycaemia
… diseases. Bioactive phytochemicals such as polyphenols, carotenoids, vitamins, minerals and others present in fruit and vegetables may be at least partly responsible for this effect. The precise mechanisms of action for several groups of compounds, and their potential impacts upon each …
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Antioxidant activity of Bulgarian medicinal plants and related biological effects // Антиоксидантна активност на български лечебни растения и свързани с нея биологични ефекти
… Scientific evidence is obtained that the total polyphenol content and the associated antioxidant capacity across many of Bulgarian plants are high and correlate positively. The effects of Agrimonia eupatoria, Sambucus ebulus and Cotinus coggygria on redox sensitive gene expression and the …
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Antioxidant properties and anti-cancer effects of polyphenols in sweetpotato leaves
… as vitamins and minerals, but they also contain polyphenol compounds including the caffeoylquinic acid derivatives and carotenoids such as lutein. Several studies have shown the polyphenol contents and antioxidant capacities of SPL, which vary based on year and variety, while few studies have …
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Use of citrus fiber in ground beef meatballs as a functional ingredient
… high-pressure liquid chromatography along with total polyphenol content, total carotenoid content and oxygen radical absorbance capacity. Results showed that citrus fiber used in this study had a trace amount of quercetin and kaempferol, and low concentrations of nobiletin, sinensetin, …
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Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum. Isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds
… davaeanuside B are proposed respectively." The total polyphenol content of S. europaea L, T. davaeanum leaves-flowers and T. davaeanum stem were found to be 5.0, 1.20 and 0.65 mg per 100 mg dried plant material respectively. A study of the antioxidant activity of the 50 % ethanol extracts of S. …
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Investigating flavor quality and variances in F2 cucumber progenies using instrumental analysis
… (°Brix), the Folin Ciocalteu reaction (polyphenols), and SPME-GC-MS (volatiles). Statistical analysis included histograms and dendrograms constructed from AHC analysis. For texture, a normal distribution of hardness was observed with a range of 1.34N-57.26N and an average of 31.78N, …
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Dietary bioactive compounds and possible health benefits of dragon fruit and star fruit
… experiments: 1) an in vitro study to analyse the total polyphenol content (TPC) and their antioxidant capacity in fresh, dehydrated, and frozen forms for all species, as well as their in vitro digestion. 2) A sensory evaluation and an in vitro digestion of red flesh dragon fruit and star fruit …
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Effect of yerba mate tea caffeine and green coffee by-products on in vitro adipogenesis and lipid accumulation and their incorporation into functional beverages
… caffeine (SC). The antioxidant capacity (AC) and total polyphenol content (TPC) of these novel caffeine sources were also investigated and compared to SC using the Oxygen Radical Absorbance (ORAC) assay and the Folin-Ciocalteu method, respectively. Lipid quantification was done by the Oil Red O …
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VALORIZATION OF CHESTNUT BY-PRODUCT FOR GASTROINTESTINAL HEALTH
… and inflammation in gastric cells. Dietary polyphenols, including tannins, have been reported to interfere with key targets of inflammation, including the nuclear factor κB (NF-κB). A promising role as a further therapeutical target for gut disorders has been recently proposed for the …
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Nitrogen and carbon costs of growth and antioxidant production during acclimation to environmental stress in two species of gethyllis
… study was to evaluate the antioxidant content (total polyphenol, flavonol/flavone and flavanone content) and antioxidant capacity [ferric reducing antioxidant power (FRAP), oxygen radical absorbance capacity (ORAC) and 2,2'-azino-di-3-ethylbenzthiazoline sulphonate (ABTS) radical cation …
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DEFATTED SEED CAKES RECOVERY TO INCREASE BIOFUEL PRODUCTION SUSTAINABILITY FROM SECOND-GENERATION OIL-CROPS
… protein source when included at 10% (w/w) of the total ration. AGHG reduction up to 70% was observed. The third step evaluated DSCs for biogas production. B. juncea produced the highest methane yield (366 ± 18 Nml CH4 g−1 TS). Continuous stirred tank reactor (CSTR) trials achieved a biomethane …
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Functionality of Azadirachta indica A. Juss (neem) in beverages
… teas- green and black tea. We found that the total polyphenols and anti-oxidant activities in green and black tea are far higher than in neem, possibly due to the presence of flavan-3-ols in these teas. However, we used LC-ESI-MS/MS to identify specific flavonols- myricetin, quercetin and …
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Flavonoid protection of cardiac cells against ischemia-reperfusion injury
… enhancing the antioxidant capacity of cells. Polyphenols, and in a more specific category, flavonoids are strong antioxidants, while possessing other biological activities such as anti-apoptotic, anti-inflammatory, and vasodilatory effects. I hypothesized that flavonoids are able to reduce …
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Selección de levaduras no-Saccharomyces para la elaboración de vinos tintos de calidad
… and C. zeylanoides presented higher levels of total anthocyanins and higher values of the total polyphenol index. (TPI) with respect to those found in wines made only with S. cerevisiae. In the last stage of the selection process, the oenological behaviour of the selected yeasts was evaluated …
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Influencia del uso de cubiertas vegetales sobre la fertilidad del suelo, la expresión vegetativa de la vid y la composición de la uva y del vino en un viñedo de Tempranillo (Vitis vinifera L.) de la D.O.C. Rioja
… no significant differences were observed in the total biomass production of the two cover crops, from 2010 onwards the concentration of nitrogen, potassium, magnesium, calcium, copper, boron and sodium was higher for clover than for barley cover crop, which reversely had a higher concentration of …
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Evaluation of the antioxidant and anti-diabesity potential of cyclopia maculata using in vitro non-cell based screening models
… the activities with phenolic composition. Total antioxidant capacity (TAC) was assessed in terms of free radical scavenging and iron reducing ability. The DPPH, ABTS, ORAC and FRAP assays were employed. Anti-diabesity potential was assessed in terms of the inhibition of the digestive …
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Sviluppo di marcatori molecolari per il miglioramento genetico dei tratti qualitativi del frutto in uva da tavola.
Il comparto viticolo è uno dei settori più importanti per l'economia, la cultura e la scienza non solo a livello mondiale, ma anche per piccole realtà come quella regionale siciliana. Sebbene il comparto vinicolo sia caratterizzato da una maggiore rilevanza economica, l'uva da tavola rappresenta …