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Rozprawy doktorskie na temat „Phenolics acids”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Ziegler, Kerstin. "Impact of dietary and microbial fatty acids on the bioavailability of phenolics." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/8515/.

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The current work addresses the possible impact of dietary and microbial fatty acids on the absorption of phenolics at the intestinal epithelium. The Caco-2 cell culture model of small intestinal enterocytes was optimised to mimic the chronic supplementation with physiological concentrations of fatty acid. Treatment with polyunsaturated fatty acids (PUFA) changed the fluidity of the brush border membrane, but this modification did not affect transepithelial transport of the test compounds caffeic acid, ferulic acid and epicatechin. PUFA supplementation did however increase paracellular diffusio

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2

Chen, Xi. "Functional food-related bioactive compounds: effect of sorghum phenolics on cancer cells in vivo and conversion of short- to long-chain omega-3 polyunsaturated fatty acids in duck liver in vivo." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/38244.

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Doctor of Philosophy<br>Department of Human Nutrition<br>Weiqun Wang<br>Many functional food related bioactive compounds have been discovered and draw the attention of scientists. This dissertation focused on sorghum phenolic compounds and omega-3 polyunsaturated fatty acids. Study 1: phenolic agents in plant foods have been associated with chronic disease prevention, especially cancer. However, a direct evidence and the underlying mechanisms are mostly unknown. This study selected 13 sorghum accessions and was aim to investigate: (1) the effect of extracted sorghum phenolics on inhibiting ca

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3

Medina-Ortega, Karla Jacqueline. "Poinsettia (Euphorbia pulcherrima Willd. ex Klotzsch: Euphorbiacea) Resistance Mechanisms against the Silverleaf Whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) Biotype B." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306856939.

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Souza, Danilo Santos 1985. "Caracterização e avaliação da capacidade antioxidante da polpa liofilizada enriquecida com extrato aquoso da semente de tamarindo (Tamarindus indica)." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254306.

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Orientador: Helena Teixeira Godoy<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-27T11:42:42Z (GMT). No. of bitstreams: 1 Souza_DaniloSantos_D.pdf: 2225742 bytes, checksum: 5bf969990f8f3aa3ec30ac2063e19739 (MD5) Previous issue date: 2015<br>Resumo: A semente do tamarindo, que possui boa parcela dos compostos bioativos do fruto, é pouco aproveitada para fins alimentícios. Desta forma, o objetivo deste trabalho foi caracterizar o fruto (polpa e semente) com relação às propriedades antioxidantes, bem como elab

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5

Bellini, Marcia Zilioli. "Caracterização bioquimica dos vinagres brasileiros." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254181.

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Orientadores: Gabriela Alves Macedo, Wilma Spinosa<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-06T19:17:05Z (GMT). No. of bitstreams: 1 Bellini_MarciaZilioli_M.pdf: 1442214 bytes, checksum: 4ed8ebf75452ab7ccac8bd227633fb41 (MD5) Previous issue date: 2006<br>Resumo: O Vinagre, alimento consumido em grande parte do mundo, pode ser produzido a partir de diferentes matérias-primas, desde que o substrato apresente fontes de carboidratos fermentescíveis e alguns micro-nutrientes como vitaminas do complex

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6

Mogotlane, Emmanuel Alpheus. "Chemical composition of indiginous of watermelon (Citrullus lanatus Tthunb) Matsum. and Nakai)) landrace seeds from the Sekhukhune and Capricorn District in the Limpopo Province." Thesis, University of Limpopo, 2015. http://hdl.handle.net/10386/1539.

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Thesis (M. Sc. (Botany)) -- University of Limpopo, 2015<br>The aim of this study was to investigate the chemical composition of indigenous watermelon landraces (Citrullus lanatus) seeds grown in two districts in the Limpopo Province. Watermelon seeds are the most undermined oilseeds. The seeds have nutritional values that compare favourably with those of soybean, sunflower and ground nuts. Many cucurbit seeds such as watermelon seeds are rich in protein and oil, although none of these products have been used on an industrial scale. Nine indigenous watermelon landraces seeds (four from the Sekh

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7

Amombo, Noa Francoise Mystere. "Crystal engineering of selected phenolic acids." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/734.

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Thesis submitted in fulfilment of the requirements for the degree Master of Technology: Chemistry in the Faculty of Applied Science at the CAPE PENINSULA UNIVERSITY OF TECHNOLOGY 2014<br>Crystal engineering based upon acid: base compounds have been studied in this thesis. Selected phenolic acids such as: vanillic acid (VA), phenylacetic acid (PAA), 4-hydroxyphenylacetic acid (HPAA), 3-chloro-4-hydroxyphenylacetic acid (CHPAA), caffeic acid (CFA), p-coumaric acid (pCA), trans-ferulic acid (tFER), 2-phenylpropionic acid (PPA) and 2-phenylbutyric acid (PBA) were the main compounds investigated. T

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8

Lal, Priya Kumari. "Maternal prenatal consumption of bioflavonoids and phenolic acids and risk of childhood brain cancer." Columbus, Ohio : Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1080569687.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xvii, 274 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: J. Schwartzbaum, School of Public Health. Includes bibliographical references (p. 171-203).

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9

Poquet, Laure. "Metabolism and effects of dietary phenolic acids." Thesis, University of Surrey, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504944.

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Ferulic acid is a secondary metabolite usually found as esters in plants and dihydrocaffeic acid results from the microbial metabolism of flavonoids and of caffeic acid, both widely distributed in food. Even though ferulic acid and flavonoids have been proposed to exert several beneficial effects on health, their in vivo activities could partly result from their microbial metabolites and strongly depend on their bioavailability. The absorption and metabolism of phenolic acids were studied in vitro with a model for the colonic epithelium composed of absorptive and mucus secreting cells, ex vivo

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10

Yeung, Shing Joseph. "Role of mycophenolic acid in kidney transplantation." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B31981860.

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11

Kheder, Fadi. "Production et purification d'acide férulique estérases. Application à la synthèse d'esters phénoliques." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL075N/document.

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L’induction de la synthèse d’une acide férulique estérase (AFE) a été étudiée chez Streptomyces ambofaciens ATCC 23877. L’activité la plus élevée a été détectée en présence de son de blé désamidonné ou de xylane d’avoine (0,22, 0,21 mU/mg protéine, respectivement). Des productions d’AFE en bioréacteur ont également été réalisées en utilisant 1% (p/v) de son de blé comme inducteur. Le niveau de production de l’AFE a été trois fois plus important en bioréacteur qu’en fiole d’Erlenmeyer. L’AFE de Streptomyces ambofaciens ATCC 23877 et celle de Humicola sp., présente dans un mélange enzymatique co

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12

Al-Hadhrami, Mohamed N. (Mohamed Nasser). "Degradation of Phenolic Acids by Azotobacter Species Isolated from Sorghum Fields." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc501189/.

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Sorghum plants excrete phenolic acids which reduce subsequent crop yields. These acids accumulate in field soil by combining with soil and clay particles to form stable complexes which remain until degraded by bacterial metabolism. The amount of phenolic acids in soil samples were obtained by gas chromatography measurements, while Azotobacter populations were obtained by plate counts in 40 sorghum field samples from Denton County, Texas. One can conclude that increasing the Azotobacter population in the soil increased the degradation rate of phenolic acids proportionally. It is proposed that s

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13

Sorour, Noha. "Lipase-catalyzed synthesis of phenolic lipids in solvent-free medium using selected edible oils and phenolic acids." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97003.

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The enzymatic synthesis of phenolic lipids (PLs) in solvent-free medium (SFM), by transesterification of flaxseed and fish liver oils with selected phenolic acids was investigated, using Candida antarctica lipase as the biocatalyst. The enzymatic synthesis of phenolic lipids from flaxseed oil was optimized in terms of water activity, agitation speed, enzyme and phenolic acid concentrations. Increasing the water activity of the flaxseed oil reaction mixture from 0.18 to 0.38 resulted in a significant increase in the bioconversion yield from 62 to 77%. The highest enzymatic activity (178 nmol of

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14

Patel, Chirag G. "The pharmacokinetics and pharmacodynamics of mycophenolic acid in kidney transplant recipients /." View online ; access limited to URI, 2006. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/fullcit/3239911.

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15

Mothapo, Mmaphefo Patricia. "Comparative evaluation of three fundamentally different analytical methods antioxidant activity determination with reference to bush tea (anthrixia phylicoides." Thesis, University of Limpopo, 2016. http://hdl.handle.net/10386/1517.

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Thesis (M.Sc. (Chemistry)) -- University of Limpopo, 2016<br>In this study, antioxidant activity methodologies were evaluated in terms of analytical performances. The total antioxidant activity from Athrixia phylicoides leaves (Bush tea) determined using 2,2-diphenyl-1-picrylhydrazyl radical scavenging (DPPH•) method, cupric ion reducing power (CUPRAC) method and cyclic voltammetry (CV). Folin-Ciocalteu method was used to quantify total phenolic content (TPC) in Athrixia phylicoides leaves. The influence of chemical and physical parameters on the total phenolic content and antioxidant activity

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16

fadhil, ali abd al-karim alkarim. "Reversed-phase and surfactant modified reversed-phase high and ultra-high performance liquid chromatography of phenolic and aliphatic carboxylic acids." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1574428923192499.

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17

Gonzalez, Rojas Alvaro. "Effect of plant growth regulator applications on phenolic quality of red grape berry skin and wine Vitis vinifera L., cvs Cabernet Sauvignon and Carmenère." Thesis, Bordeaux 2, 2012. http://www.theses.fr/2012BOR21920/document.

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La composition phénolique du vin rouge détermine fortement sa qualité: couleur, goût, texture et la plupart des bienfaits pour la santé. Les conditions ambiantes de la vigne modulent l'équilibre hormonal endogène et l'expression de gènes qui contrôlent la voie de synthèse des composés flavonoïdes, en déterminant la composition phénolique finale du raisin. Même s'ils ont été étudiés, les effets des applications des régulateurs de croissance végétale sur l'équilibre hormonal endogène et la qualité du raisin, les effets de ces substances sur la composition et la qualité du vin sont pauvrement doc

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18

Khoddami, Ali. "Phenolic Compounds in Grains of Australian-Grown Sorghums: Quantitative Analyses including Impacts of Malting and Effects on Broiler Nutrition." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14985.

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Grain sorghum (Sorghum bicolor) is one of the most important food and animal feed crops in arid and semi-arid regions of the world. Sorghum grain is rich in starch and contains many functional health-promoting compounds including B-group vitamins, vitamin E and a broad range of phenolics. There is increasing interest internationally to extend the commercial use of sorghum grain as an affordable but nutritious source of animal feed and as a functional food. The utilisation of energy by broiler chickens offered sorghum-based diets seems inadequate due to various factors such as kafirin, phytate

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19

Yeung, Shing Joseph, and 楊誠. "Role of mycophenolic acid in kidney transplantation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31981860.

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Cai, Rongxuan. "Canola phenolics, color and structural changes of sinapine and sinapic acid." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ44993.pdf.

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Williams, Jeffrey Douglas. "The flavonoids and phenolic acids of the genus Silphium and their chemosystematic and medicinal value." Thesis, View online, 2006. http://www.lib.utexas.edu/etd/d/2006/williamsj92964/williamsj92964.pdf#page=3.

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Thesis (Ph. D.)--University of Texas at Austin, 2006.<br>Includes bibliographical references (p. 188-194). Also available via the World Wide Web: http://www.lib.utexas.edu/etd/d/2006/williamsj92964/williamsj92964.pdf#page=3

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22

Al-Obaidi, U. "Nitrous acid catalysed nitration of phenols in sulphuric acid." Thesis, University of Exeter, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373818.

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Magnoumba, Legnanga Magalli Marcelline. "The trapping of methylglyoxal by phenolic acids : effect on antioxidant and antibacterial activity." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/65835.

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Methylglyoxal (MGO) is a reactive carbonyl species found in Manuka honey reported to cause advanced glycation end products (AGE) formation. AGE’s increase the risk for hyperglycaemia resulting in neuropathy, arteriosclerosis, retinopathy and Alzheimer’s disease. Phenolic acids such as pyrogallol (PY) are known to trap MGO, lessening the harmful effects of MGO as an AGE precursor. However, MGO is also a very effective antibacterial agent therefore; its trapping could have negative side effects. Manuka honey contains both phenolic acids such as gallic acid (GA), caffeic acid (CA) as well as MGO

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Bahrin, Nurfariza. "Renewable monomers for bio-styrene formation using phenolic acid decarboxylase." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/100542/.

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Lignocellulose is an abundant natural polymer on earth that contains renewable resource of aromatic compound, the lignin. Many industrially valuable chemicals can be developed from lignin and this can reduce the dependency on petrochemicals. Wheat straw contains ferulic acid as one of its building blocks, which can be accumulated as a major metabolite from growth with Rhodococcus jostii RHA1, a known lignin degrading bacteria in minimal media. Using the enzyme phenolic acid decarboxylase (PAD) in engineered E.coli, ferulic acid was converted into 4-vinylguaiacol (3-methoxy-4-hydroxystyrene). T

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Skoglund, Maria. "Phenolic compounds in oats : effects of steeping, germination and related enzymes /." Uppsala : Dept. of Food Science, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200802.pdf.

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Dagmey, Aurélien. "Enrichissement d’huiles alimentaires riches en acides gras polyinsaturés, par des composés phénoliques d’origine naturelle, afin de les protéger de la peroxydation lipidique, en vue d’une encapsulation pour augmenter la durée de conservation de ces huiles." Thesis, Compiègne, 2020. http://bibliotheque.utc.fr/EXPLOITATION/doc/IFD/2020COMP2553.

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Les acides linoléique (LA) et α-linolénique (ALA) sont deux acides gras polyinsaturés. Ils sont indispensables à l’Homme car nous sommes incapables de les synthétiser in situ. Ces deux acides gras sont les représentants des oméga-6 (LA) et oméga-3 (ALA). Bien qu’ils soient indispensables et donc nécessaires, l’enjeu du ratio oméga-6/oméga-3 entre ces deux familles est également important à prendre en compte dans l’alimentation. Les habitudes de consommation des Français, ces trente dernières années, ont fait évoluer la balance en défaveur des oméga-3 par rapport aux oméga-6. Or un rééquilibre

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27

Kerimi, Asimina. "Exploring mechanisms of action of flavonoids and phenolic acids on pathways of lipid metabolism." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578663.

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Epidemiological studies- indicate an association between the consumption of a 'diet rich in polyphenols and several health benefits. As diabetes and other lipid associated diseases are now reaching menacing proportions worldwide, the need for the development of cost-efficient prevention strategies effective at the population level becomes more essential than ever. Studies in the biological effects of polyphenols are now starting to include their hypoglycaemic and hypolipidemic properties and to investigate potential mechanisms through which they may exert their actions. The focus of the presen

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De, Paula Rosanna. "Effect of pasta processing on physicochemical properties of barley β-glucan and phenolic acids". Doctoral thesis, Università degli studi del Molise, 2014. http://hdl.handle.net/11695/66244.

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Il crescente interesse nella correlazione tra alimentazione e salute ha indotto la comunità scientifica ad un maggior impegno nel campo della ricerca di alcune sostanze dalle ri-conosciute proprietà salutistiche (phytochemicals), naturalmente presenti in una vasta gamma di prodotti di interesse agro-alimentare. I cereali in genere, nonché i prodotti da essi derivati, sono tra gli alimenti più idonei a veicolare composti bioattivi (phytochemicals) come ad esempio β-glucani e composti fenolici. Evidenze scientifiche hanno dimostrato, infatti, che β-glucani e acidi fenolici possono avere import

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Zhang, Chenzhu, and 张辰珠. "The effects of rapamycin and mycophenolic acid on inflammatory and fibrotic processes in the pathogenesis of lupus nephritis: animal and in vitro studies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B45898935.

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Foley, Mark Kneale. "Characterisation of the interactions between amino acid derivatives and phenolic compounds." Thesis, Bangor University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443633.

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Bergvinson, David. "Role of phenolic acids in maize resistance to the European corn borer, Ostrinia nubilalis (Huebner)." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/7690.

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Host plant resistance of maize, Zea mays L., to the European corn borer (ECB), Ostrinia nubilalis Hubner, has been largely attributed to the hydroxamic acid DIMBOA. However, DIMBOA does not consistently account for observed resistance in both field and greenhouse environments. It was hypothesized that phenolic acids, a major secondary metabolite in plants, make an important contribution to resistance, through cell wall carbohydrate complexes. Preliminary studies incorporating ferulic acid into the meridic diet of the ECB did not show any adverse effects until 10 mg/g, a dosage that is approxim

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Gillard, Conrad. "A novel process for the recovery of phenolic compounds from olive mill wastewater." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15964.

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Requirements for the treatment of wastewater have grown increasingly stringent in recent years, while industrial processes face increasing competition. As a result, there is a great demand for the development of processes that not only treat wastewater, but convert it into value added products. In this thesis, a new process of this nature is proposed. Specifically, a two-stage process is conceived to treat olive mill wastewater (OMW), and produce a concentrated stream of phenolic compounds. The primary pollutants found in OMW are phenolic acids and other phenolic compounds. These pollutants

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Morton, Lincoln William. "The role of dietary phenolic compounds in the detoxification of reactive nitrogen species." University of Western Australia. Dept. of Medicine, 2003. http://theses.library.uwa.edu.au/adt-WU2003.0026.

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[Truncated abstract. Please see the pdf format for the complete text.] Interest in the role of peroxynitrite in the pathogenesis of atherosclerosis has increased due to many in vitro studies which have demonstrated its potent oxidising and nitrating capability and immunohistochemical staining studies which demonstrate nitration of tyrosine in vivo. It is frequently suggested that the production of nitric oxide and superoxide at sites of inflammation implicates peroxynitrite as the major damaging reactive nitrogen species in vivo. Evidence for a role for peroxynitrite is often demonstrated by

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Johnsson, Pernilla. "Phenolic compounds in flaxseed : chromatographic and spectroscopic analyses of glucosidic conjugates /." Uppsala : Institutionen för livsmedelsvetenskap, Sveriges lantbruksuniv, 2004. http://epsilon.slu.se/9717372.pdf.

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Zaffarano, Jennifer I. "MINIMUM INHIBITORY CONCENTRATIONS OF TWO COMMON FOOD PHENOLIC COMPOUNDS AND THEIR EFFECT ON THE MICROBIAL ECOLOGY OF SWINE FECES IN VITRO." UKnowledge, 2003. http://uknowledge.uky.edu/gradschool_theses/182.

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Feeding sub-therapeutic levels of antibiotics to livestock has been associated withdevelopment and spread of antibiotic resistant bacteria. The present experiment was conductedto investigate the effect of antibiotic alternatives (caffeic acid, chlorogenic acid, and carbadox)on the microbial ecology of swine feces in vitro.Minimum inhibitory concentrations of caffeic and chlorogenic acids were determined forseveral pathogens using macrobroth and agar dilution techniques. Gram-negative bacteria werenot inhibited. Caffeic acid inhibited four Staphylococcus aureus strains at 200 ppm or less, andtw

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Paracatu, Luana Chiquetto [UNESP]. "Ácido cafeico e seus ésteres: inibição do burst oxidativo de neutrófilos e efeito anti-Helicobacter pylori." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/93126.

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Made available in DSpace on 2014-06-11T19:26:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-06-29Bitstream added on 2014-06-13T19:25:33Z : No. of bitstreams: 1 paracatu_lc_me_arafcf.pdf: 657634 bytes, checksum: 11ed69514067f35e0f7dba9e2f7ec13c (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Universidade Estadual Paulista (UNESP)<br>A ação patogênica do Helicobacter pylori envolve a colonização do trato gastrointestinal e a produção de EROs por neutrófilos atraídos e ativados pelo agente da infecção. A reação mediada pelos PMN é, todavia, ineficaz pa

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Ndolo, Victoria Uchizi. "Characterisation of chemical components in manually isolated aleurone and associated layers from maize, wheat and barley kernels." Elsevier, 2013. http://hdl.handle.net/1993/30914.

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Health benefits related to consumption of whole grains have been attributed in part to phytochemical and micronutrient composition. Understanding the composition, structure and distribution of these components in different cereal grains is of potential importance in aiding the selection of whole grains and their processed fractions for inclusion in the diet, and as ingredients in development of new food products. The aim of this research was to characterise the chemical components in the botanical fractions of yellow corn, barley, wheat. Manual separation, a tedious and laborious technique tha

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Talag, Agela Hussain Mohammed. "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." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14482.

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The aim of this research was to investigate the phytochemistry of two species Sanicula europaea and Teucrium davaeanum which are traditionally used in treatment of wounds. Four compounds were isolated from the 80% methanolic extract of S. europaea; bis-(2-ethylhexyl) phthalate (1), palmitic acid (2), rosmarinic acid (3), saniculoside N (4). Compounds 1 and 2 were isolated for the first time from this species. The structure elucidation of the isolated compounds was on the basis of 1D, 2D NMR spectroscopy and mass spectrometry measurements. Two compounds were isolated from the crude glycosides e

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Cairns, Paulette Anne. "Effects of Hydroxycinnamates and Exogenous Yeast Assimilable Nitrogen on Cider Aroma and Fermentation Performance." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/101679.

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Heritage apple cultivars for cider-making are often distinguished by a high concentration of tannins (phenolic compounds), and/or acid. The phenolic content of some cider apples far exceeds that of white wine, however most cider fermentation practices are directly taken from white winemaking, not accounting for effects of high concentrations of phenolic compounds on yeast fermentation. The objective of this study was to determine the impact of ferulic acid, p-coumaric acid, and chlorogenic acid—at concentrations reported in apples—and their interactions with yeast assimilable nitrogen (YAN) on

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Fukuji, Tatiana Shizue. "Propostas metodologicas para componentes em matrizes alimenticias, alimentos enriquecidos e contaminantes utilizando eletroforese capilar acoplada a espectrometria de massas e detecção UV/VIS." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-28032012-100624/.

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O trabalho envolve o desenvolvimento de métodos para análise de alimentos visando a determinação de ácidos fenólicos em frutas, ácido fólico em farinhas enriquecidas e corantes Sudan em produtos de pimenta utilizando eletroforese capilar nos modos de detecção UV e MS. A separação de dez ácidos fenólicos (ácidos clorogênico, siríngico, p-cumárico, benzóico, p-hidroxibenzóico, ferúlico, vanílico, cafeico, gálico e protocatecuico) foi obtida por eletroforese capilar de zona (CZE). Um eletrólito composto de 50 mmol L-1 de tetraborato e 7,5% metanol (v/v) permitiu a separação em linha de base dos d

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Rodrigues, Eliseu 1983. "Capacidade desativadora de espécies reativas de oxigênio e de nitrogênio por carotenoides e extrato de maná-cubiu = Scavenging capacity of carotenoids and extract from mana-cubiu against reactive oxygen and nitrogen species." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254193.

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Orientador: Adriana Zerlotti Mercadante<br>Texto em português e Inglês<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-20T20:11:20Z (GMT). No. of bitstreams: 1 Rodrigues_Eliseu_D.pdf: 6784010 bytes, checksum: 5c87585adb4a85d2dd85217c8fee7430 (MD5) Previous issue date: 2012<br>Resumo: Neste trabalho foi avaliada a capacidade antioxidante de carotenoides em sistema homogêneo e em lipossomas, de carotenoides microencapsulados e de extratos de maná-cubiu (Solanum sessiflorum) frente às espécies reativas de oxigê

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AraÃjo, Vivianne Machado de. "Study of therapeutic potential of acid caffeic protocols and diabetes in mice dyslipidemia." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12037.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>The diabetes and dyslipidemia are important in cardiovascular risk factors. When associated with oxidative stress may accelerate coronary artery disease and progression of atherosclerotic lesions. There are several natural products that stand out as potential therapeutic agents for treatment of such diseases, including caffeic acid, a phenolic compound that has a variety of biological and pharmacological activities described in the literature. Thus, the aim of this study was to evaluate the therapeutic potential of caffeic acid in e

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Alber, Annette Veronika. "Phenolic 3-hydroxylases in land plants : biochemical diversity and molecular evolution." Thesis, Strasbourg, 2016. http://hdl.handle.net/1828/7651.

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Plants produce a rich variety of natural products to face environmental constraints. Enzymes of the cytochrome P450 CYP98 family are key actors in the production of phenolic bioactive compounds. They hydroxylate phenolic esters for lignin biosynthesis in angiosperms, but also produce various other bioactive phenolics. We characterized CYP98s from a moss, a lycopod, a fern, a conifer, a basal angiosperm, a monocot and from two eudicots. We found that substrate preference of the enzymes has changed during evolution of land plants with typical lignin-related activities only appearing in angiosper

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CHAFAA, SALAH. "Nouvelle generation de chelatants acides phenols methylphosphoniques proprietes thermodynamiques et spectroscopiques." Université Louis Pasteur (Strasbourg) (1971-2008), 1993. http://www.theses.fr/1993STR13026.

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La synthese de nouveaux ligands multidentates, les acides (o-hydroxyphenyl) methylphosphoniques, obtenus a partir de phenol o-(bromomethyl) ou o-(hydroxymethyl) et de phosphites trialkyls ainsi que la premiere etude physicochimique de leurs solutions, sont decrites. Les constantes de dissociations de ces polyacides et les constantes de stabilite de complexes metalliques avec les ions mg#2#+, ca#2#+, sr#2#+, ba#2#+, ni#2#+, cu#2#+ et zn#2#+ sont determinees a 25c dans des solutions aqueuses maintenues a force ionique constante 0,1 m (naclo#4) par potentiometrie et par spectrophotometrie d'absor

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Kaushik, Prashant. "Application of Conventional, Biotechnological and Genomics Approaches for Eggplant (Solanum melongena.L). Breeding with a Focus on Bioactive Phenolics." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/122295.

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[ES] En el primer capítulo, se caracterizó una colección de seis accesiones de berenjenas, 21 accesiones de 12 especies silvestres y 45 híbridos interespecíficos de berenjena con especies silvestres utilizando 27 descriptores morfológicos y 20 descriptores morfométricos de frutos basados en la herramienta fenómica Tomato Analyzer. Observamos diferencias significativas entre los tres grupos, con híbridos que muestran valores intermedios para la mayoría de los descriptores. Las especies silvestres mostraron una amplia diversidad para ampliar la base genética de la berenjena. En el segundo capítu

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Nguyen, Thi D. T. "Antilarval substituted phenols, distribution of tricyclic pyrones in mice, and synthesis of unnatural amino acids." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18199.

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Doctor of Philosophy<br>Department of Chemistry<br>Duy H. Hua<br>Three research projects were carried out and they are described below. The synthesis of substituted phenolic compounds including halogenated di- and trihydroxybenzenes, aminophenols, and substituted di-tert-butylphenols are described. Redox potentials of the synthesized molecules along with various known laccase substrates were measured, and an inverse relationship between the oxidation potential and the efficiency of oxidation by laccase of halogenated hydroxybenzenes and aminophenols is demonstrated. The synthesized substitu

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Shahab, Muhammad. "Dynamics of abscisic acid in relation to color and phenolic compounds of 'Benitaka' table grape." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2018. http://www.bibliotecadigital.uel.br/document/?code=vtls000218121.

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A Benitaka é uva de mesa importante, mas apresenta deficiência no desenvolvimento da cor vermelha devido à inibição da produção de antocianinas quando cultivada em áreas subtropicais. A aplicação exógena de reguladores de crescimento, como o ácido abscísico (ABA), pode ser um dos métodos utilizados para superar esse problema. O objetivo deste trabalho foi estudar a ação do isômero do ácido (S) -cis-abscísico (S-ABA) sobre ao desenvolvimento de cor, concentração de antocianinas e melhoria da qualidade da uva de mesa 'Benitaka', e determinar o tempo mais adequado para aplicação do S-ABA para e

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David, Michèle. "Phenols a chaine ortho allylique hydroxylee : syntheses et heterocyclisations en milieu acide." Rennes 1, 1990. http://www.theses.fr/1990REN1T086.

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Afanas'yev, Dmytro. "Reactions of anthocyanins and o-quinones in model systems and foods." Master's thesis, 2010. http://hdl.handle.net/10048/1400.

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Molecules of anthocyanins and quinones possess distinctive electrophilic character, which is demonstrated by their facile reactions with nucleophiles such as sulfite, thiols, amines and water. In food systems, one of their likely targets would be nucleophilic centers in the side chains of amino acids. Our experiments revealed that on a short-term exposure (1 72 h) to free amino acids in solutions with pH < 7 glycosides of cyanidin and quinones of phenolic acids did not yield nucleophilic addition products with most of the amino acids. A notable exception was cysteine, which reacted with oxidi

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Gibson, Lara Dawn. "Characterization of Fruit Development and Ripening of Vaccinium angustifolium Ait. in Relation to Microclimate Conditions." 2011. http://hdl.handle.net/10222/14407.

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Berry ripening in lowbush blueberry (Vaccinium angustifolium Ait.) is influenced by developmental, physiological and climatic factors resulting in a heterogenous mix of maturities at harvest. This study characterizes the physico-chemical changes which occur during fruit ontogeny and links ripening patterns to micoclimate. Individual clones in five commercial fiels were followed in the 2006 and 2007 growing seasons. Phenolic acids, flavonols, and flavan-3-ols decreased and anthocyanins increased with maturity. Peak maturity consistently occurred at 1200 accumulated growing degree days (GDD). T

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