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Dissertations / Theses on the topic 'Phenolic antioxidant'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Jardini, Fernanda Archilla. "Avaliação da atividade antioxidante da romã (Punica granatum, L.) - participação das frações de ácidos fenólicos no processo de inibição da oxidação." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-30062008-163119/.

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Os antioxidantes de origem natural têm importância na área de alimentos, pois podem representar uma alternativa de substituição aos antioxidantes sintéticos. Os compostos fenólicos, presentes nos vegetais, desempenham importância na inibição da oxidação, A romã (Punica granatum, L.) é rica em compostos fenólicos como as antocianinas, flavonóides e ácidos fenólicos. Avaliou-se a atividade antioxidante da polpa e semente de romãs plantadas no Brasil (Pernambuco), e foi feita a obtenção dos extratos e frações de ácidos fenólicos da fruta, que foram submetidos aos testes de co-oxidação de substrat

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2

Rees, Jonathan David. "Engineering phenolic antioxidant properties in tomato fruit." Thesis, Royal Holloway, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251609.

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3

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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Cakir, Esra. "Varietal differences in antioxidant activity and phenolic composition of asparagus." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Summer2007/e_cakir_062107.pdf.

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5

Ballard, Tameshia Shaunt'a. "Optimizing the Extraction of Phenolic Antioxidant Compounds from Peanut Skins." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28349.

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Peanut skins are a low-value byproduct of peanut blanching operations. They have been shown to contain significant levels of phenolic compounds with demonstrated antioxidant properties. The effects of two types of extraction methods: solid-liquid extraction (SLE) and microwave-assisted extraction (MAE) on the recovery of phenolic compounds from peanut skins were investigated. Response surface methodology was used to optimize extraction conditions based on total phenolic content (TPC), ORAC (oxygen radical absorbance capacity) activity and <i>trans</i>-resveratrol content. The protective effect

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SILVA, Tacila Mendes da. "Caracterização fenólica e capacidade antioxidante de vinhos tintos do Hemisfério Sul." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/15685.

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Submitted by Isaac Francisco de Souza Dias (isaac.souzadias@ufpe.br) on 2016-03-04T18:48:09Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação final Tacila.pdf: 1238681 bytes, checksum: 6cca34a1235332cde644aeb6e77a8651 (MD5)<br>Made available in DSpace on 2016-03-04T18:48:10Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação final Tacila.pdf: 1238681 bytes, checksum: 6cca34a1235332cde644aeb6e77a8651 (MD5) Previous issue date: 2015-06-22<br>CAPES<br>A vitivinicultura, comum

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7

Shikanga, EA, S. Combrinck, and T. Regnier. "South African Lippia herbal infusions: Total phenolic content, antioxidant and antibacterial activities." Elsevier, 2010. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001254.

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Abstract Lippia javanica and Lippia scaberrima are used as herbal remedies and are commercially traded as health teas in southern Africa under the brands “Mosukujane” and “Musukudu”, respectively. This study evaluates the relationship between the presence of phenolic compounds and the antioxidant activities of infusions prepared from four Lippia species (L. javanica, L. scaberrima, L. rehmannii and L. wilmsii) indigenous to South Africa. The antioxidant activities of the infusions, determined by the 2,2-diphenylpycrylhydrazyl (DPPH) method, were also compared to those of popular black, green a

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8

Matos, Melanie S. "Exploring the potential of natural extracts obtained from winemaking waste streams for cosmetic applications." Master's thesis, Universidade Nova de Lisboa, Instituto de Tecnologia Química e Biológica António Xavier, 2017. http://hdl.handle.net/10362/79299.

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"Phenolic compounds present in grapes have been widely explored as cosmetic principles, because of their renowned antioxidant activity and proven ability to directly inhibit certain enzymes relevant for skin ageing. The winemaking process generates large amounts of waste streams, thus recovery of phenolic bioactive compounds from residues and further incorporation in cosmetic products represents a promising market opportunity for wine producers, and may contribute to a sustainable development of the sector.(...)"<br>N/A

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9

Vicente, Silvio José Valadão. "Caracterização antioxidante do café (Coffea arabica, L.) e efeitos da sua administração oral em ratos." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/6/6133/tde-10092009-092017/.

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Introdução: Um dos fatores de risco para doenças crônicas não-transmissíveis é o excesso de espécies reativas causado pelo estresse oxidativo. Ácidos fenólicos atuam na defesa contra estas espécies, agindo como antioxidantes e como fatores de transcrição para as enzimas antioxidantes fase II (superóxido dismutase, catalase e glutationa peroxidase). Vários alimentos possuem ácidos fenólicos na composição porém o café se destaca pelo alto conteúdo dos mesmos e por ser consumido mundialmente. Objetivos: a) Comparar a capacidade antioxidante e a estabilidade dos cafés regular e descafeinado ao lon

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10

Lindhorst, Kathleen. "Antioxidant activity of phenolic fraction of plant products ingested by the Maasai." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/MQ44206.pdf.

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11

Zwane, Eunice Nonhlanhla. "Investigation of the antioxidant activity of phenolic compounds in cell culture systems." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/12126.

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Includes abstract.<br>Includes bibliographical references (leaves 81-95).<br>This study focuses on newly synthesized polyphenolic compounds which were expected to be antioxidants in vivo. Antioxidants are compounds which at low concentrations can prevent or reduce the deleterious effects caused by reactive oxygen species (ROS) induced by UVA exposure of the skin. This study focuses on developing methods required to measure the effects of these synthesized compounds in ultraviolet radiation-exposed cultured skin cells. Biocatalytic synthesis of polyphenolic compounds was carried out using isola

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12

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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Oliveira, Lucillia Rabelo de. "Avaliação dos compostos fenólicos e das propriedades antioxidantes da polpa do pequi (Caryocar spp) processado e in natura." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-22052013-113150/.

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O pequi caracteriza-se por possuir expressiva quantidade de compostos fenólicos, que por apresentarem propriedades antioxidantes estão associados com a prevenção da formação de radicais livres. Além de ser consumido in natura, é também comumente consumido na forma processada. No entanto, sabe-se que os antioxidantes presentes nos vegetais podem ser afetados pela forma de processamento e provocam alterações dos teores de fenólicos totais (FT) bem como da sua atividade antioxidante. Este trabalho objetivou avaliar o teor de FT e as propriedades antioxidantes da polpa do pequi processado e in nat

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14

Siwela, Muthulisi. "Finger millet grain phenolics and their impact on malt and cookie quality." Thesis, Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-10172009-120048/.

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15

Artajo, Medina Luz Stella. "Phenolic Compounds:Their Role During Olive Oil Extraction and in Flaxseed - Transfer and Antioxidant Function." Doctoral thesis, Universitat de Lleida, 2006. http://hdl.handle.net/10803/8375.

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Els biofenols comprenen un gran grup de metabòlits secundaris que presenten una àmplia varietat d'estructures i una gran diversitat d'activitats biològiques. Específicament, l'interès en l'oliva i la llavor del lli (llinassa) està relacionat amb el seu perfil fenòlic i amb la influència directa d'aquest en la qualitat de productes derivats, Així com en el possible ús en aliments funcionals.<br/>Com a resposta a aquest plantejament, la tesi s'ha centrat a la investigació del paper dels compostos fenòlics durant el procés d'extracció de l'oli d'oliva i de llinassa.<br/>Es van tenir en compte dos

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16

Venter, Alet. "Phenolic composition and in vitro antioxidant capacity of South African plums (Prunus salicina Lindl.)." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80199.

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Thesis (MSc Food Sc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Phenolic compounds of the types present in plums have been found to exhibit health-promoting properties associated with their antioxidant capacity. Fruits with red peel and/or flesh are thus sought-after for their high antioxidant levels. In the current study South African plum (Prunus salicina Lindl.) cultivars and selections, harvested during two consecutive fruit seasons, were compared in terms of general fruit attributes (colour, firmness, °Brix, pH, titratable acidity), phenolic composition and antioxidant capacity.

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Kucich, Daniela Amalia. "Total phenolic content and antioxidant capacity of a selection of South African indigenous fruits." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2322.

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Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2015.<br>It has recently been confirmed that people consuming 7+ portions of fruit and vegetables daily have a lower risk of mortality from any cause. With a fifth of the population of South Africa falling below the poverty line, it has been found that rural adults have a very low daily intake of fruit and vegetables; at the same time rural children are consuming a primarily maize-based diet. This low dietary diversity translates into a higher level of infectious diseases in children younger than five years. Interventions at

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18

Espe, Austin Alexander. "Phenolic Bioactive-Linked Antioxidant, Anti-Hyperglycemic, and Anti-Hypertensive Properties of Serviceberry and Blackberry." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/29796.

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Production and consumption of edible berries are increasing rapidly in the United States, mostly due to their superior flavor profile, and popular diet-related value with their human health relevant bioactives and nutritional benefits. However, bioactive and nutritional qualities, especially human health protective phenolic antioxidants and associated non-communicable chronic disease (NCD) relevant health benefits of berries vary widely among accessions/cultivars and due to different production practices (organic vs conventional). Therefore, the aim of this thesis was to screen and select high

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19

Durmaz, Ezgi. "Microwave Extraction Of Phenolic Compounds From Caper And Oleaster." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614418/index.pdf.

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The main objective of this study was to extract phenolic compounds from caper and oleaster by using microwave. The effects of microwave power (400 and 700 W), extraction time (5-20 min), solid to solvent ratio (1:10, 1:20 and 1:30) and solvent type (water, ethanol and different ratios of ethanol-water mixture) on total phenolic content, antioxidant activity and concentration of the phenolic compounds in the extracts were investigated. In conventional extraction, extraction time and solvent type were used as independent variables. Microwave extraction was compared with conventional extraction.

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Chiremba, Constance. "Phenolic content and antioxidant activity of South African sorghums and of flours and cookies made from them." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-11302009-190811/.

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21

Giada, Maria de Lourdes Reis. "Avaliação da capacidade antioxidante dos compostos fenólicos do cotilédone da semente de girassol (Helianthus annuus L.) rajada." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/9/9132/tde-22082017-093259/.

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No presente trabalho foi avaliada a capacidade antioxidante in vitro dos extratos do cotilédone da semente de girassol rajada, obtidos por extração seqüencial com solventes de diferentes polaridades, bem como avaliado o potencial antioxidante in vitro do extrato que apresentou maior capacidade in vitro. Todos os parâmetros in vitro (sistema β-caroteno/ácido Iinoléico, métodos FRAP, DPPH, ORAC e Rancimat) indicaram o extrato aquoso (EAq) como o de maior capacidade. Neste extrato, o ácido clorogênico (12,88%) foi identificado como o principal componente dos ácidos fenólicos. Na avaliação da

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22

Santana, Gracielle Silva. "Caracterização química bioguiada pela atividade antioxidante de Erytrhoxylum mucronatum Benth. (Erythroxylaceae)." Pós-Graduação em Ciências Farmacêuticas, 2018. http://ri.ufs.br/jspui/handle/riufs/7603.

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The search for healing and the service of diseases through the ingestion of herbs and leaves may have been one of the first ways of using natural products. Scientists and the pharmaceutical industry have demonstrated intense in ventures researched for the purpose of discovery. Other species found in the flora of Sergipe are still unknown or little known scientifically, such as the Erythroxylum mucronatum species that has no reports in the literature of its use in folk medicine, as well as chemical and pharmacological studies have not yet been recorded. The objective of the present study was to

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Pascoal, Andreia Sofia do Cabo. "Quantification and characterization of the phenolic compounds of kenaf leaves." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11002.

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Dissertation for the Master Degree in Technology and Food Security<br>In the food industry is necessary to bring new ways to improve the taste and quality of food and add health benefits for the consumer, some herbs and plants are a good natural source of antioxidants having the ability to protect the human system from many chronicle diseases, such as Parkinson and inflammatory processes. Combining these two worlds there is a way to acquire a new product. To know if the plant chosen is suitable to be a future add to a certain food it’s necessary to study the components of the plant and determ

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Kuzina, Anastasiya. "Valorização de subprodutos de cenoura. Promoção da componente bioactiva." Master's thesis, ISA/UL, 2014. http://hdl.handle.net/10400.5/8218.

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Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia<br>The high volume of carrot byproducts from the fresh-cut industry (SPC) justifies the interest in its valorisation. The goal of the present investigation was to study the usability of abiotic stress (wound) in promotion of bioactive component of carrot byproducts and posterior recovery (water extraction) and valorisation (incorporation in bread). Carrot byproducts demonstrated a valuable source of antioxidant compounds with a total phenolic compound (CFT) of 46.4 mg EAC.100 g-1 and carotenoids (CCT) of 11.8 mg eq β-carotene.

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Konda, Paula Becker Pertuzatti 1984. "Phenolic compounds and antioxidant capacity in blueberry species produced in Brazil = Compostos fenólicos e capacidade antioxidante em espécies de mirtilo produzidas no Brasil." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254319.

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Orientadores: Helena Teixeira Godoy, Isidro Hermosín-Gutiérrez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-25T09:19:08Z (GMT). No. of bitstreams: 1 Konda_PaulaBeckerPertuzatti_D.pdf: 1709064 bytes, checksum: 32eff0f96e85c62585e501c2d1fa6158 (MD5) Previous issue date: 2014<br>Resumo: A produção de mirtilos iniciou-se no Brasil na década de 80 e a comercialização da fruta na década de 90. Apesar de ser um cultivo novo no país, observa-se que a cada dia o fruto tem ganhado mais espaço, o que fez com que aum

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Martins, Carolina de Aguiar. "Avaliação da atividade antioxidante in vitro e in vivo do guaraná (Paullinia cupana) em pó." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/6/6138/tde-31012011-093906/.

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Introdução Estudos indicam que antioxidantes presentes naturalmente em alguns alimentos são capazes de atuar como protetores dos organismos vivos frente aos danos causados pelo estresse oxidativo em macromoléculas como lipídios, proteínas e em DNA. O guaraná (Paullinia cupana), planta originária da Amazônia, contém elevadas concentrações de taninos e cafeína, compostos com comprovada atividade antioxidante. Apesar do aumento no consumo de guaraná e de estudos associando seus efeitos benéficos à saúde, há poucas informações sobre suas propriedades antioxidantes in vivo. Objetivos: avaliar o ef

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Xu, Minwei. "Improvement of the Physicochemical Attributes and Antioxidants Profiles from Pulse Seeds through Germination." Diss., North Dakota State University, 2019. https://hdl.handle.net/10365/31344.

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Edible pulse seeds are good sources of food ingredients. Germination has been regarded as an effective process to further improve nutrient digestibility and accessibility of pulse seeds. Our aim was to observe the effect of germination on proximate composition, physicochemical attributes, and phenolic profiles of chickpea (Cicer arietinum L.), lentil (Lens culinaris Merr.), and yellow pea (Pisum sativum L.). In addition, mechanisms of how germination affects the antioxidant activity of phenolic compounds were proposed. Chemical composition, thermal, pasting, and moisture adsorption properties

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Pedreschi, Romina Paola. "Fractionation of phenolic compounds from a purple corn extract and evaluation of antioxidant and antimutagenic activities." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2343.

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Qualitative and quantitative analysis of anthocyanins and other phenolic compounds from a purple corn extract was performed. The purple corn extract had cyanidin-3-glucoside, pelargonidin-3-glucoside, peonidin-3-glucoside and its respective acylated anthocyanin-glucosides. Cyadinin-3glucoside was the main constituent (44.4 ?? 4.7%) followed by the acylated cyanidin-3-glucoside (26.9 ?? 8.0%). Other phenolic compounds present in the purple corn corresponded to protocatechuic acid, vanillic acid, and p-coumaric acid. In addition, quercetin derivatives, a hesperitin derivative and pcoumaric and f

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Matsumoto, Ruth Lobato Teixeira. "Atividade antioxidante do chá mate (Ilex paraguariensis)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/6/6133/tde-21072008-150005/.

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INTRODUÇÃO: A erva-mate (Ilex paraguarienis), uma planta nativa e consumida em grande parte da América do Sul, apresenta diversos compostos bioativos que já demonstraram importante atividade antioxidante in vitro e in vivo. O chá mate é um produto desta planta cujas propriedades antioxidantes ainda não foram avaliadas em ensaios com humanos. OBJETIVO: Este projeto visa avaliar o potencial antioxidante do chá mate in vivo e ex vivo sobre o plasma e LDL de humanos após a ingestão de chá-mate. MÉTODOS: Indivíduos em jejum (n=20) tiveram seu sangue coletado em três momentos: antes, após uma hora e

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Ramirez, Luis Daniel Daza. "Obtenção de extratos secos de cagaita (Eugenia dysenterica DC) pelo método de atomização: avaliação das propriedades físicas e potencial funcional in vitro." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-29092015-132615/.

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As frutas nativas brasileiras têm grande potencial agroindustrial e farmacêutico por serem excelentes fontes de compostos bioativos fenólicos. A cagaita (Eugenia dysenterica DC.), típica do Cerrado, se destaca por conter compostos fenólicos com alta capacidade de inibir as enzimas envolvidas no metabolismo de carboidratos in vitro. Esta ação também ocorre com o consumo de suco, que causa redução da hiperglicemia pós-prandial em seres humanos, tanto saudáveis como resistentes a insulina. No entanto, devido à alta perecibilidade dos frutos, o armazenamento, transporte e ampla distribuição destes

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Silva, Aline Holanda. "Development and characterization of extract from Erythrina velutina for the treatment of neurodegenerative disease." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7363.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Dentre as espÃcies do gÃnero Erythrina (Fabaceae), duas conhecidas popularmente como mulungu, E. velutina e E. mulungu, tem comprovado interesse social e econÃmico para o Brasil. E. mulungu ocorre no Sudeste, pertence Ã RelaÃÃo Nacional de Plantas de Interesse para o SUS (RENISUS). JÃ E. velutina Ã uma Ãrvore amplamente utilizada no Nordeste, cuja casca do caule Ã utilizada tradicionalmente no tratamento da ansiedade, agitaÃÃo e insÃnia. Contudo, nÃo existe um produto farmacÃutico com qualidade agregada e estudos farmacolÃgicos des

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Abreu, Bruno Vinicius de Barros. "Bioprospecção de pólen de Melipona fasciculata Smith." Universidade Federal do Maranhão, 2016. http://tedebc.ufma.br:8080/jspui/handle/tede/1654.

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Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-06-21T17:43:08Z No. of bitstreams: 1 BrunoAbreu.pdf: 1120537 bytes, checksum: 18303bb96f213f559c593116cb3e5442 (MD5)<br>Made available in DSpace on 2017-06-21T17:43:08Z (GMT). No. of bitstreams: 1 BrunoAbreu.pdf: 1120537 bytes, checksum: 18303bb96f213f559c593116cb3e5442 (MD5) Previous issue date: 2016-06-30<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão (FAPEMA)<br>The stingless bees, stingless bees, social, found in

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Silva, Mônica Cristina de Paiva. "Caracterização físico-química, teor de antioxidante e perfil sensorial de méis de abelhas submetidos à desumidificação e umidificação." Universidade Federal Rural do Semi-Árido, 2015. http://bdtd.ufersa.edu.br:80/tede/handle/tede/805.

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Submitted by Lara Oliveira (lara@ufersa.edu.br) on 2017-09-08T22:08:06Z No. of bitstreams: 1 MonicaCPS_DISSERT.pdf: 1456234 bytes, checksum: a294a8e5b47a4265307f32eaa5dbf4f5 (MD5)<br>Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-09-11T16:27:43Z (GMT) No. of bitstreams: 1 MonicaCPS_DISSERT.pdf: 1456234 bytes, checksum: a294a8e5b47a4265307f32eaa5dbf4f5 (MD5)<br>Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-09-11T16:28:17Z (GMT) No. of bitstreams: 1 MonicaCPS_DISSERT.pdf: 1456234 bytes, checksum: a294a8e5b47a426

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Herrera-Calderon, Oscar, Jorge Arroyo-Acevedo, Juan Rojas-Armas, et al. "Phytochemical Screening, Total Phenolic Content, Antioxidant and Cytotoxic Activity of Chromolaena laevigata on Human Tumor Cell Lines." SCIENCEDOMAIN international, 2017. http://hdl.handle.net/10757/622501.

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Aims: Cancer is the first cause of death in the Peruvian population; searching alternative treatments of medicinal plants constitute a promissory field to find new anticancer drugs. The main objective in this study was to evaluate the phytochemical screening, total phenolic content, antioxidant and cytotoxic activity of ethanol extract of Chromolaena laevigata (C. laevigata) on human tumor cell lines. Study Design: The fresh leaves of C. laevigata were soaked with ethanol followed by phytochemical screening using standard methods. Place and Duration of Study: Laboratory of Applied Chemistry, F

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Jardini, Fernanda Archilla. "Atividade dos compostos fenólicos antioxidantes da romã (Púnica granatum, L.) -- avaliação in vivo e em culturas de células." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-31052010-150831/.

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Os radicais livres são formados constantemente em nosso organismo, e em quantidades controladas desempenham alguns papéis fisiológicos. Entretanto, sua presença em quantidades acima daquelas aceitáveis passa a ser um fator de risco para funcionamento adequado do organismo. Muitas doenças crônicas degenerativas têm sua origem no desequilíbrio do estado redox. Apesar de possuir um sistema de proteção antioxidante endógeno, o organismo pode ser beneficiado pela presença de compostos antioxidantes exógenos, como os compostos fenólicos encontrados em alguns alimentos. A romã (Punica granatum, L) é

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Blessington, Tyann. "The effects of cooking, storage, and ionizing irradiation on carotenoids, antioxidant activity, and phenolics in potato (Solanum tuberosum L.)." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2589.

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Past research conducted by our lab demonstrated that potatoes contain significant levels of phytochemicals important to human health. However, since potatoes are not consumed raw, it is important to determine the effects of processing on these levels. Therefore, the changes in carotenoid content, antioxidant activity, and phenolic content were investigated using combinations of cultivars, cooking methods, storage treatments, and low-dose ionizing irradiation. Carotenoid content was measured via absorbance at 445 nm, 450 nm, and HPLC identification. Antioxidant activity was measured initially a

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Barcia, Milene Teixeira 1983. "Study of phenolic compounds and antioxidant capacity of by-products from winemaking process = Estudo dos compostos fenólicos e capacidade antioxidante de subprodutos do processo de vinificação." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254318.

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Orientadores: Helena Teixeira Godoy, Isidro Hermosín-Gutiérrez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-24T07:59:41Z (GMT). No. of bitstreams: 1 Barcia_MileneTeixeira_D.pdf: 4811486 bytes, checksum: f7f9e34df585b2658347bb259cbf89e5 (MD5) Previous issue date: 2014<br>Resumo: Bagaço (cascas e sementes) e borra (sedimentos sólidos) são os mais abundantes subprodutos do processo de vinificação, pois o primeiro representa aproximadamente 5% do total de uva processada e, o segundo, 4% do volume total de vin

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Hasbay, Adil Incinur. "Pressurized Liquid Extraction Of Phenolic Compounds From Fruit Pomaces." Phd thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607525/index.pdf.

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In this study, extraction of phenolic compounds from sour cherry, peach and apple pomaces using high pressure extraction (HPE) and subcritical CO2 extraction (SCE) was investigated considering total phenolic content (TPC) and antiradical efficiency (AE). Different combinations of pressure (50, 125, 200 MPa), temperature (20, 40, 60&amp<br>#61616<br>C), solid/solvent ratio (0.05, 0.15, 0.25 g/ml) and extraction time (10, 25, 40 min) were used for HPE according to the Box-Behnken experimental design. The variables used for SCE were pressure (20, 40, 60 MPa), temperature (40, 50, 60&amp<br>#6161

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Zilioli, Estevão 1980. "Composição química e propriedades funcionais no processamento de vinagres." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256617.

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Orientadores: Fumio Yokoya, Wilma Aparecida Spinosa<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-18T19:27:06Z (GMT). No. of bitstreams: 1 Zilioli_Estevao_D.pdf: 1342863 bytes, checksum: 7edd470d68c76d42e008244763b239e8 (MD5) Previous issue date: 2011<br>Resumo: Os vinagres de frutas popularizam-se cada vez mais no planeta, sendo produzidos a partir de diversos cultivares ou de seus resíduos, com o uso de técnicas clássicas ou modernas. Esses produtos apresentam grande variedade de ácidos orgânicos, vitami

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Bagetti, Milena 1983. "Caracterização físico-química, compostos fenólicos majoritários da fruta e atividade antioxidante da geléia de cambuci (campomanesia phaea O. Berg.)." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254823.

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Orientador: Marcelo Alexandre Prado<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-24T21:32:47Z (GMT). No. of bitstreams: 1 Bagetti_Milena_D.pdf: 1465509 bytes, checksum: 5b6272cea8cf4d57c901fbd9188d205d (MD5) Previous issue date: 2014<br>Doutorado<br>Ciência de Alimentos<br>Doutora em Ciência de Alimentos

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Eça, Kaliana Sitonio 1986. "Desenvolvimento de coberturas e filmes de pectina incorporados de extratos de frutas = estudo da estabilidade e difusão de nutrientes, efeito fotoprotetor e antioxidante quando aplicado em alimentos = Development of pectin coatings and films incorporated with fruit extracts :." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256455.

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Orientador: Florencia Cecilia Menegalli<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-27T18:11:02Z (GMT). No. of bitstreams: 1 Eca_KalianaSitonio_D.pdf: 11624368 bytes, checksum: 1d2527979251f0edd2a7c6d6a523f634 (MD5) Previous issue date: 2015<br>Resumo: O objetivo do presente trabalho foi desenvolver revestimentos ativos de pectina incorporados com extratos de frutas a fim de entender e avaliar a estabilidade e a difusão dos nutrientes incorporados aos mesmos, assim como o seu efeito antioxidante quando a

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Valencia, Yemina Karen Diaz. "Características de grãos e amido de diferentes cultivares de quinoa (Chenopodium quinoa Willd.)." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11141/tde-10052016-175319/.

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Os grãos de quinoa possuem excelente balanço nutricional além das propriedades funcionais, comparativamente superior à dos cereais. A quinoa é cultivada em diversos países e, devido às suas características, têm aumentado o interesse de pesquisadores e consumidores. A quinoa contém pericarpo branco, no entanto, existem grãos com pericarpo vermelho e preto, e todos os tipos são utilizados como alimento em diferentes preparações. Com o objetivo de avaliar as características de grãos de quinoa, amostras de cor branca, preta e vermelha foram analisadas quanto às propriedades físico-químicas e funci

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Kawassaki, Fabiana. "Efeito da região de plantio, cultivares, safras e parboilização sobre compostos fenólicos com atividade antioxidante em arroz integral produzido no Brasil." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-24022012-103246/.

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O arroz (Oryza sativa L.) integral é rico em compostos fenólicos livres e conjugados (solúveis) e ligados (insolúveis). Atribui-se a estas substâncias propriedades benéficas à saúde humana devido à elevada ação antioxidante. Porém, pouco se conhece sobre o efeito do ambiente e de processos tecnológicos como a parboilização sobre os seus teores. Este trabalho teve como objetivo estudar a variabilidade nos teores de compostos fenólicos solúveis e insolúveis em arroz integral em função da região de plantio e safras. Avaliou-se também o efeito da parboilização nos fenólicos e sua atividade antioxi

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Silva, Matheus Henrique Reis da [UNESP]. "Fungos endofíticos associados à Passiflora incarnata e avaliação de seu potencial biotecnológico." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151172.

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Submitted by MATHEUS HENRIQUE REIS DA SILVA null (matheush.reis@hotmail.com) on 2017-07-09T02:47:58Z No. of bitstreams: 1 Dissertação_publicação.pdf: 3294602 bytes, checksum: 0458f3a3b432485c88a1b6dd0524aed5 (MD5)<br>Rejected by Monique Sasaki (sayumi_sasaki@hotmail.com), reason: Solicitamos que realize uma nova submissão seguindo a orientação abaixo: Incluir o número do processo de financiamento nos agradecimentos da dissertação/tese. Corrija esta informação e realize uma nova submissão com o arquivo correto. Agradecemos a compreensão. on 2017-07-13T19:22:36Z (GMT)<br>Submitted by

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Rezende, Larissa Cavalcante de. "Avaliação da atividade antioxidante e composição química de seis frutas tropicais consumidas na Bahia." reponame:Repositório Institucional da UFBA, 2010. http://www.repositorio.ufba.br/ri/handle/ri/10639.

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106 f.<br>Submitted by Ana Hilda Fonseca (anahilda@ufba.br) on 2013-04-05T13:23:56Z No. of bitstreams: 1 Tese Larissa Rezende.pdf: 2690263 bytes, checksum: 4461df09facd5282efcaf6bceeddc6bd (MD5)<br>Approved for entry into archive by Ana Hilda Fonseca(anahilda@ufba.br) on 2013-05-09T13:01:47Z (GMT) No. of bitstreams: 1 Tese Larissa Rezende.pdf: 2690263 bytes, checksum: 4461df09facd5282efcaf6bceeddc6bd (MD5)<br>Made available in DSpace on 2013-05-09T13:01:47Z (GMT). No. of bitstreams: 1 Tese Larissa Rezende.pdf: 2690263 bytes, checksum: 4461df09facd5282efcaf6bceeddc6bd (MD5) Previous issue dat

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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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Matos, Amanda Dupas de. "Avaliação bioquímica nutricional de cultivares de arroz." Universidade do Vale do Rio dos Sinos, 2014. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3763.

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Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2015-06-05T12:52:21Z No. of bitstreams: 1 Amanda Dupas de Matos.pdf: 534443 bytes, checksum: 00c5612cbb7be0307b022cbbd64abc5c (MD5)<br>Made available in DSpace on 2015-06-05T12:52:21Z (GMT). No. of bitstreams: 1 Amanda Dupas de Matos.pdf: 534443 bytes, checksum: 00c5612cbb7be0307b022cbbd64abc5c (MD5) Previous issue date: 2014-07-24<br>Nenhuma<br>O arroz é um cereal reconhecido pelas suas propriedades funcionais devido principalmente aos compostos bioativos presentes nas camadas mais externas do grão. Embora exista grand

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Sampathkumar, Yamuna. "Thermal processing effects on total phenolic content, antioxidant activity, trypsin inhibitor activity and in-vitro protein digestibility of lentils." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107918.

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Heat pre-treatment of nutrient-rich lentil seeds prior to their processing into flour may enhance its use by reducing processing and preparation times in value added products. In this study, changes in trypsin inhibitor content, total phenolic content, antioxidant activity, and in-vitro protein digestibility of flours prepared from hulled red lentils and unhulled green lentils were determined subsequent to various processing methods such as oven roasting (OR), boiling and microwave heating (MH). The increasing interest in the phenolic content of plant based food-stuffs made us to assess two d

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Nigdikar, Shailja Vijay. "The antioxidant activities of phenolic compounds in wine and related foods : effect on human plasma and low density lipoproteins." Thesis, University of Surrey, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268090.

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Khalaf, Eyada. "Phenolic-Linked Antioxidant and Anti-Hyperglycemic Properties of Selected Cereal, Pseudo-Cereal, and Millet Using In Vitro Screening Methods." Thesis, North Dakota State University, 2018. https://hdl.handle.net/10365/29281.

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Improving diversity of food systems by targeting whole grain cereals, pseudo-cereals, and millets is essential to enhance nutritional qualities beyond macro and micronutrient balance and to address emerging global food and nutritional security-linked public health challenges. However, human health relevant nutritional parameters of whole grains vary widely among species, genotypes, growing conditions, and further due to different processing methods. Therefore, it is important to screen human health relevant nutritional parameters of these whole grains prior to targeting them for wider public h

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