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Dissertations / Theses on the topic 'Flavonoids content'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Símílíen, Arsène Shannon Dennis Alan. "Effect of shade, irrigation and nutrients on dry matter yield and flavonoid content of American skullcap." Auburn, Ala, 2009. http://hdl.handle.net/10415/1647.

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2

Holasová, Petra. "PSE extrakce rostlinného materiálu pro potravinářské účely." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216538.

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Flavonoids were identified and quantified in samples of dry leaves of plant Stevia rebaudiana Bertoni. Content of flavonols (kaempherol, quercetin, myricetin, rutin) and flavons (apigenin, luteolin) were compared in three samples (standard leaves of Stevia rebaudiana Bertoni, Stevia rebaudiana Bertoni origin from Ukraine and from Czech republic), that were extracted by three extraction methods (PSE, ultrasonic extraction, Soxhlet extraction) with two polar solvents, methanol and ethanol, in combination with non-polar hexane. Extracts were analyzed by HPLC with detection UV-VIS. Antioxidant act

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3

Mbamalu, Oluchi Nneka. "Content levels, in vitro dissolution and predicted bioavailability of flavonoids from Sutherlandia frutescens leaf powder and aqueous extracts." University of the Western Cape, 2015. http://hdl.handle.net/11394/4817.

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Philosophiae Doctor - PhD<br>Various formulations of the popular South African medicinal plant, Sutherlandia frutescens,are commercially available, with no documented specifications for quality assessment. With plans already underway for a clinical trial to assess its efficacy in HIV patients, there is a need for scientifically validated tests for the quality control of products of this plant. Chemical constituents of the plant are many and varied but it is still unclear which might be the most appropriate ones to monitor for activity or to describe the quality of the plant’s products. For qua

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4

Roy, Sutapa. "POLYPHENOL CONTENT AND DIFFERENTIAL EXPRESSION OF FLAVONOID BIOSYNTHETIC PATHWAY GENES OF FRAGARIA SPP. WITH WHITE FRUIT." UKnowledge, 2016. http://uknowledge.uky.edu/pss_etds/72.

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Strawberries are a rich source of polyphenols which contribute to berry color and plant disease resistance, and have been shown to lower the risk of many chronic when consumed. While a considerable body of work exists on the polyphenolic composition of commercial strawberry (Fragaria x ananassa Duch.), less information is available concerning polyphenols in Fragaria vesca, or Alpine strawberry, considered a model system for the Rosaceae family of crop species. The study of natural and genetically-engineered F. vesca mutants with white fruit can provide unique insight into regulation of metabol

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5

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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Martinez, Stephanie. "Pharmacokinetic and pharmacodynamic investigations of select natural products and nutraceuticals for human and veterinary health." John Wiley & Sons, Ltd, 2013. http://hdl.handle.net/1993/31166.

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Natural products are teeming with potential therapeutic agents. One group of compounds, polyphenols, from plants, exhibit anti-cancer, anti-inflammatory and anti-oxidant activities. Four polyphenolic compounds and their enantiomers were investigated in this thesis; the stilbene, 3-methoxypterostilbene, a structural analog of resveratrol, and the chiral prenylflavonoids from hops (Humulus lupulus L.); 8-prenylnaringenin, 6-prenylnaringenin and isoxanthohumol. A high performance liquid chromatography method for 3-methoxypterostilbene and enantiospecific liquid chromatography-mass spectrometry as

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Vasco, Catalina. "Phenolic compounds in Ecuadorian fruits /." Uppsala : Dept. of Food Science, Swedish University of Agricultural Sciences, 2009. http://epsilon.slu.se/200954.pdf.

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8

Nellvecia, Madike Lerato. "Cytotoxic and genotoxic studies of crude extracts from the leaves, stems and roots of Tulbaghia Violacea." Thesis, Vaal University of Technology, 2017. http://hdl.handle.net/10352/364.

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M. Tech. (Biotechnology, Faculty of Applied and Computer Science), Vaal University of Technology<br>Tulbaghia violacea Harv. (wild garlic) has been used in traditional medicine in Southern Africa for the treatment of various ailments. Despite the widespread use and popularity of this medicinal plant as a herbal medicine, there is contradictory evidence regarding the safety and toxicity of the plant. The phytochemical profiling of the plant has also been neglected in research. The determination of chemical constituents present in plant material as well as the potential toxicity found in plants

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9

Yoshida, Letícia Costa Tomazelli. "Fotoprotetores bioativos multifuncionais contendo rutina, octil dimetil PABA e avobenzona: caracterização físico-química, funcional e eficácia clínica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-06122017-104059/.

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A exposição crônica à radiação solar pode contribuir para o aparecimento do câncer de pele, sendo o uso de fotoprotetores um fator primordial na prevenção desses efeitos deletérios. Atualmente, substâncias bioativas tais como a rutina têm sido foco de interesse da comunidade científica graças às suas propriedades fotoprotetoras e antioxidantes, que podem promover aumento dos valores de FPS, além de conferir características multifuncionais às formulações. Achados in vitro recentes indicam que a rutina, quando incorporada em emulsões fotoprotetoras óleo em água, promove aumento da atividade anti

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10

Almeida, Natália Ellen Castilho de. "Reatividade das lupulonas, terpenos, flavonoides prenilados e compostos contendo grupos tióis livre frente aos radicais formados durante o envelhecimento da cerveja." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-02022015-161613/.

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A reatividade das lupulonas, terpenos, flavonoides prenilados e compostos contendo grupos tióis livre foi avaliada frente ao radical 1-hidroxietila (HER) para melhor conhecer o balanço redox da cerveja. As constantes de velocidade aparentes (kap) para a reação entre HER e os substratos supracitados foram obtidas via cinética de competição utilizando a armadilha química 4-POBN como competidor e monitorando-se o aduto radical formado por RPE. A partir dos valores obtidos de kap (108 L mol-1 s-1 para as lupulonas, 105 a 107 L mol-1 s-1 para terpenos, 109 L mol-1 s-1 para os flavonoides prenilados

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11

LINS, NETO João da Rocha. "Potencial antioxidante de plantas da flora pernambucana." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16900.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-05-09T12:23:42Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação João Neto_Bibl Central.pdf: 1346533 bytes, checksum: c9180ed2cbbece23d0513b31179f3139 (MD5)<br>Made available in DSpace on 2016-05-09T12:23:42Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação João Neto_Bibl Central.pdf: 1346533 bytes, checksum: c9180ed2cbbece23d0513b31179f3139 (MD5) Previous issue date: 2015-05-22<br>CAPEs<b

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12

WANG, GAI. "Effect of Frozen Storage on Antioxidant Capacity, Polyphenol Oxidase Activity, and Phenolic and Flavonoid Content and Color of Pawpaw Pulp." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1373373703.

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13

Oliveira, Rafael Portugal Rizzo Franco de. "Desenvolvimento de nanoemulsões contendo flavonoides de Ocotea notata (Nees) Mez e avaliação de suas atividades biológicas." Niterói, 2017. https://app.uff.br/riuff/handle/1/3164.

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Submitted by Biblioteca da Faculdade de Farmácia (bff@ndc.uff.br) on 2017-03-28T16:51:43Z No. of bitstreams: 1 Oliveira, Rafael Portugal Rizzo Franco de [Dissertação, 2014].pdf: 2189274 bytes, checksum: ea08452f36c971680598c7fa0742290c (MD5)<br>Made available in DSpace on 2017-03-28T16:51:43Z (GMT). No. of bitstreams: 1 Oliveira, Rafael Portugal Rizzo Franco de [Dissertação, 2014].pdf: 2189274 bytes, checksum: ea08452f36c971680598c7fa0742290c (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A busca por medicamentos mais seguros e com menores efeitos adversos levou o

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14

Griebeler, Susana Andreia. "Validação de metodologia analítica para matéria-prima vegetal, extrato seco e cápsulas de gelatina dura contendo extrato seco de uncaria tomentosa (Willd) dc." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/28871.

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A espécie Uncaria tomentosa (Rubiaceae) é reconhecida por diversos povos sul-americanos, devido a sua importância etnofarmacológica. Na sua maioria, os estudos realizados com U. tomentosa empregam como matéria prima vegetal a casca, devido à fração rica em alcalóides. Entre os constituintes químicos relatados para a espécie destacam-se os flavonóides, triterpenos e alcalóides, aos quais é atribuído um número significativo de propriedades terapêuticas. A escassez de metodologias analíticas para o doseamento do teor de alcalóides de U. tomentosa motivou a realização do presente trabalho, que vis

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15

Battisti, Mariana Alves. "Desenvolvimento de nanocarreador lipídico contendo extrato padronizado de Cecropia pachystachya Trécul. visando à obtenção de medicamentos de uso tópico." 2015, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/135688.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Farmácia, Florianópolis, 2015.<br>Made available in DSpace on 2015-10-20T03:14:02Z (GMT). No. of bitstreams: 1 335070.pdf: 833962 bytes, checksum: 883b5ae2ef4b25930e0373ffa35cb9fd (MD5)<br>Cecropia pachystachya Trécul, espécie nativa e abundante no sul e sudeste do Brasil, é amplamente utilizada na medicina popular. Recentemente, C. pachystachya teve sua atividade anti-inflamatória demonstrada e atribuída à composição rica em polifenóis, especialmente flavonoides. Nanocarr

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16

Serem, June Cheptoo. "An exploratory investigation into the physicochemical, antioxidant and cellular effects of a selection of honey samples from the Southern African region." Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/24881.

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The unique floral biodiversity of Southern Africa would be reflected in the phenolic acid and flavonoid composition as well as the antioxidant activity of honeys from this region. In this exploratory investigation the total polyphenolic (TPC) and flavonoid (TFC) content, antioxidant activity as well as the cellular protective effects of a selection of honeys collected in this region was evaluated. Thirteen honey samples representative of the Western Cape (WCa, WCb and WCc), Eastern Cape (ECa, ECb and ECc), South East Mozambique (SEMa, SEMb and SEMc) and Agricultural: A-E (Eucalyptus) (A-E1 and

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17

Fontes, Gleide Gatti. "Efeito de formulação fitoterápica contendo Calendula officinalis no metabolismo lipídico em ratos Wistar alimentados com dieta de cafeteria." Universidade Federal de Viçosa, 2015. http://www.locus.ufv.br/handle/123456789/6491.

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Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2015-11-03T13:41:26Z No. of bitstreams: 1 texto completo.pdf: 2088035 bytes, checksum: 387c546949b58bc7b1b7d6d44bc8722a (MD5)<br>Made available in DSpace on 2015-11-03T13:41:26Z (GMT). No. of bitstreams: 1 texto completo.pdf: 2088035 bytes, checksum: 387c546949b58bc7b1b7d6d44bc8722a (MD5) Previous issue date: 2015-03-26<br>Calendula officinalis (Asteraceae) é uma planta medicinal popularmente conhecida como malmequer. O extrato de suas flores é fonte de flavonoides, compostos que apresentam propriedades principalmente

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18

Morales, Alfaro Julia. "Effect of Rootstock on the Fruit Quality of Mandarins "Clemenules" and "Tango", and Blood Oranges "Tarocco Rosso" and "Moro"." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/165858.

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[ES] La citricultura se enfrenta a escenarios ambientales cambiantes que provocan diferentes estreses bióticos y abióticos que pueden dificultar la producción o afectar a la calidad de la fruta. El patrón sobre el cual se injerta una variedad específica es una importante herramienta para mejorar su adaptabilidad a cada área de cultivo. En la presente Tesis se realiza el estudio del efecto del patrón sobre la calidad físico-química y nutricional de la fruta en variedades de gran interés comercial en la actualidad, mandarinas 'Clemenules' y 'Tango' y naranjas sanguinas 'Tarocco Rosso' y 'Moro'

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19

Cruz, Marcos Antônio Eufrasio. "Desenvolvimento de materiais bioinspirados contendo Sr2+ para modificação de superfícies de Ti." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-16022018-150811/.

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Ao longo dos últimos anos, Sr2+ tem sido aplicado em estudos in vitro e in vivo como um importante agente para o estímulo de osteogênese. Dessa forma, a criação de matrizes bioativas contendo Sr2+ é uma tendência na área de modificações de superfícies metálicas para aplicações em implantes de substituição óssea. Nesta dissertação, desenvolvemos sistemas bioinspirados que possam atuar como carreadores de Sr2+ em biomateriais. Na primeira parte, superfícies de Ti foram modificadas com filmes híbridos contendo SrCO3 e ou CaCO3. A formação dos filmes híbridos foi mediada pela deposição de filmes L

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20

Baby, André Rolim. "Desenvolvimento e avaliação da estabilidade de formulações cosméticas anticelulíticas contendo o extrato comercial de Trichilia catiguá Adr. Juss (e) Ptychopetalum olacoides Bentham, padronizado em flavonóides totais." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-04102007-192348/.

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A hidrolipodistrofia ginóide, popularmente denominada de celulite, é caracterizada como um processo distrófico que produz alterações estruturais dos elementos presentes na pele, como: modificações no tecido conjuntivo, comprometimento da microcirculação periférica cutânea, hipertrofia e hiperplasia dos adipócitos e edema. Os flavonóides são utilizados como substâncias ativas em preparações anticelulíticas por reduzirem a permeabilidade capilar. Os objetivos estabelecidos para esta pesquisa foram: (1) desenvolver emulsões cosméticas com finalidades anticelulíticas; (2) validar metodologia analí

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21

Lin, Tsan-Ling, and 林粲翎. "Analysis of Flavonoids Content in Vegetables by High Performance Liquid Chromatography." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/11187093530808820535.

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碩士<br>臺灣大學<br>園藝學研究所<br>98<br>Flavonoids are a class of plant secondary metabolites found in many fruits and vegetables, and known for their anti-oxidation capacity. Flavonoids are important in the human diet since there is evidence that they act as antioxidant, and reduce the risk of cardiovascular diseases and cancers. With the consciousness of health, flavonoid content in fruits and vegetables becomes a popular research topic. To have better understanding of the distribution of flavonoids in horticultural crops, HPLC technique was studied and applied to analyze the flavonoids in common vege

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22

Chiu, Yu-Chen, and 邱于珍. "Effect of ultrafine milling on total flavonoids content and antimicrobial activity of bamboo leaf extracts." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/13905526211465838588.

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碩士<br>國立臺灣大學<br>農業化學研究所<br>97<br>Abstract This study applied ultrafine-milling technology on bamboo leaf. The post-milled particle size of bamboo leaf was examined. The chemical content, bioactive material of bamboo leaf extract, and its ability to suppress bacterial growth were investigated. The antimicrobial material in bamboo leaf was also preliminarily determined. The extracting solvent used in this study included water and 60% ethanol. After a 1 hour ultrafine-milling treatment, using either water or 60% ethanol, the mean particle size and d90 of bamboo leaf decreased obviously. With even

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23

Nndwammbi, Matodzi. "The effects of debarking and seasonal variations on physical structure; phenolic content and biological activities of Sclerocarya Birrea in the Nylsvley Nature Reserve." Diss., 2016. http://hdl.handle.net/11602/790.

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24

Hsiao, Yu-Lin, and 蕭玉玲. "Studies on flavonoids and colchicine contents in Hemerocallis fulva L." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/09693343695998035255.

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碩士<br>實踐大學<br>食品營養研究所<br>92<br>For understanding the contents of needle of daylily’s flavonoids and colchicine, the needle of daylily’s was extracted by different solution (methanol, ethanol, chloroform, dichloromethane), the extracted thing was analized through spectrophotometer to measure the contents of total phenols、flavonoids、carotenoids、chlorophylls 、DPPH (1,1-dipheny-2-picrylhydrazyl) radical activeity、ferrous ion chelating power and the ability of reducing potassium ferricyanide. The result shows that the quantity of total phenols、carotenoids、chlorophylls of one day daylily’

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25

Liao, Hsiu-Yuan, and 廖秀媛. "Contents of flavonoids and organic acids in various commercial fruit juices." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/04050526560623286748.

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碩士<br>國立臺灣海洋大學<br>食品科學系<br>94<br>Abstract Intake of phytochemicals from fruits, especially phenolic compounds are beneficial to human. This study determined the contents of the organic acids such as chlorogenic acid and ferulic acid, and some flavonoids, such as rutin and quercetin, in different kinds of fruit juices, including made-from-concentrated or not-from-concentrate fruit juice, local or import fruit juice, organic or regular fruit juice. This study also examined the HPLC analysis conditions to extract fruit juices. The extract methods were also studied and the results showed that the

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26

Chen, Pei-Hauan, and 陳姵璇. "Study of Skullcap (Scutellaria indica) callus culture and its flavonoids contents." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/47541919917928981796.

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碩士<br>輔仁大學<br>生命科學系碩士班<br>105<br>Scutellaria indica (skullcap), a perennial Lamiaceae herb and a traditional medicinal plant used in East Asia,is genetically close to Scutellaria lateriflora (SL). SL is the American species of SI and is also a commonly used medicinal plant. According to the study of Brock et al. (2012), extracts of SL can relieve anxiety, calm the nervous, and improve the insomnia symptoms; it has been even made into beverages for sale. Although there have some reports about the flavonoids contents of Scutellaria indica, there is no tissue cultures of skullcap has been studied

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Chen, Yu-Ling, and 陳玉玲. "Preparation Processes of Crisps from Sweet Potato Leaves and Total Phenolic and Total Flavonoid Contents." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/75261528195572642047.

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碩士<br>大葉大學<br>生物產業科技學系碩士在職專班<br>102<br>Four commercially available sweet potato leaves: (1) green heart-shaped sweet potato leaves (GH)、(2) green claw-shaped sweet potato leaves (GC)、(3) purple heart-shaped sweet potato leaves (PH) and (4) purple claw-shaped sweet potato leaves (PC) as samples. Total phenolic and flavoid were analyzed through heat reflux extraction and ultrasound extraction. Samples with the most total phenolic and flavoid were further baked into crisps in order to observe phenolic and flavoid under different temperatures from hot air drying processing. Finally, the researcher

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