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Dissertations / Theses on the topic 'Phenolic fractions'

Author: Grafiati
Published: 8 June 2024
Last updated: 31 July 2025

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1

Kalili, Kathithileni Martha. "Application of comprehensive 2-dimensional liquid chromatography for the analysis of complex phenolic fractions." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2420.

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Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: The separation of apple, cocoa and green tea phenolic compounds by comprehensive 2-dimensional liquid chromatography (2-D-LC) has been studied. In the first dimension, phenolic compounds were separated according to polarity by hydrophilic interaction chromatography (HILIC) on a diol stationary phase with a mobile phase containing acetonitrile, methanol, acetic acid and water. Gradient reversed-phase (RP) LC using a C18 column with fluorescence detection was employed in the second dimensi
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2

Pedapati, S. C. S. H. "RECOVERY OF PHYTOCHEMICAL RICH FRACTIONS FROM WINEMAKING BYPRODUCTS FOR NOVEL FOOD APPLICATIONS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/244954.

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The food industry is facing the significant challenge of developing new ingredients and foods addressing prevention of the major chronic diseases, while optimizing processing technologies in order to achieve a sustainable use of natural resources. Grape pomace, the byproduct of winemaking, is available on a large scale and is comprised of various compounds associated with potential health benefits. In this context, the overall PhD project aimed at developing an integrated strategy for recovery and reuse of value added fractions of winemaking byproducts in the food system. Grape pomace samples
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3

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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4

Le, Thi Tuong. "Purification et propriétés anti-inflammatoires et anti-oxydantes des fractions phénoliques issues de coproduits de production d'isolats protéiques d'oleoproteagineux." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0270.

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Le colza et le tournesol sont les plantes oléagineuses les plus cultivées en Europe en général, et en France en particulier. Certains industriels se concentrent actuellement sur le développement de procédés industriels d'extraction/purification des protéines des tourteaux de ces deux végétaux. Ces procédés génèrent des coproduits qui sont des effluents aqueux salins riches en composés phénoliques tels que l'acide cholorgénique (CGA, pour le tournesol) et la sinapine (SP, pour le colza). La capture de ces composés phénoliques qui peuvent agir comme anti-oxydants naturels et/ou anti-inflammatoir
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5

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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6

Aleksandra, Novaković. "Biopotencijal autohtonih gljiva u funkciji nutraceutika." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=95449&source=NDLTD&language=en.

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Karakterizacija&nbsp; ekstrakata&nbsp; plodnih&nbsp; tela&nbsp; devet&nbsp;autohtonih&nbsp; vrsta&nbsp; gljiva&nbsp; pripadnika&nbsp; razdela&nbsp;Basidiomycota&nbsp; obuhvatila&nbsp; je&nbsp; preliminarno&nbsp;ispitivanje&nbsp; hemijskog&nbsp; sastava&nbsp; i&nbsp; ispitivanje biolo&scaron;ke&nbsp; aktivnosti.&nbsp; Primenom&nbsp; HPLC‐MS/MS&nbsp; i&nbsp;GC-FID tehnike &nbsp;detektovan&nbsp;je&nbsp;i&nbsp;određen&nbsp;sadržaj&nbsp;fenolnih&nbsp;jedinjenja&nbsp;i&nbsp;metil&nbsp;estara&nbsp;masnih&nbsp;kiselina.&nbsp;Primenom&nbsp; tehnike&nbsp; elektroforeze&nbsp; na&nbsp; mikročipu&nbsp;(&qu
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7

Sukhbaatar, Badamkhand. "SEPARATION OF ORGANIC ACIDS AND LIGNIN FRACTION FROM BIO-OIL AND USE OF LIGNIN FRACTION IN PHENOL-FORMALDEHYDE WOOD ADHESIVE RESIN." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-06062008-155306/.

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Bio-oil produced from biomass by the fast pyrolysis method is promising as a renewable fuel and as sources of industrial chemicals. In this study, lower cost separation methods of organic acids such as acetic and formic acids and pyrolytic lignin fraction present in bio-oil were investigated to provide basic data needed for future industrial production procedures. The calcium oxide method and a quaternary ammonium anion-exchange resin method were studied to separate organic acids as respective salts and the methanol-and-water method was studied to separate the water-insoluble pyrolytic lignin
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8

Демчук, Юрій Ярославович. "Бітуми, модифіковані смолами, одержаними з фенольної фракції кам’яновугільної смоли". Diss., Національний університет "Львівська політехніка", 2021. https://ena.lpnu.ua/handle/ntb/56146.

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9

Ramos, Patrícia Alexandra Bogango. "Chemical characterization and evaluation of biological activity of Cynara cardunculus extractable compounds." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15686.

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Doutoramento em Química<br>The Mediterranean species Cynara cardunculus L. is recognized in the traditional medicine, for their hepatoprotective and choleretic effects. Biomass of C. cardunculus L. var. altilis (DC), or cultivated cardoon, may be explored not only for the production of energy and pulp fibers, but also for the extraction of bioactive compounds. The chemical characterization of extractable components, namely terpenic and phenolic compounds, may valorize the cultivated cardoon plantation, due to their antioxidant, antitumoral and antimicrobial activities. In this study, the chem
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10

Snipes, Lauren. "Inhibition of human aldose reductase by high phenolic and high anti-oxidative extracts of muscadine grape fractions." 2006. http://purl.galileo.usg.edu/uga%5Fetd/snipes%5Flauren%5Fe%5F200608%5Fms.

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11

Maskus, Heather. "Use of pea (Pisum sativum L.) flours and fractions as food ingredients : effect on texture, sensory results, antioxidant activity and total phenolic content." 2008. http://hdl.handle.net/1993/21213.

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12

Martin, Antony. "A toolkit for the rapid improvement of bioenergy crops: the cell wall fraction." Thesis, 2016. http://hdl.handle.net/1959.13/1317553.

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Research Doctorate - Doctor of Philosophy (PhD)<br>With the realisation of the impending impact of climate change, the scientific community has been working towards generating viable renewable energy sources that do not contribute to the greenhouse effect. Bioethanol is one form of renewable energy that could replace the majority of transportation fuels, however, its production efficiency and commercial viability relies on optimisation of agricultural quality and yields, biomass conversion to sugars, and fermentation of these sugars into ethanol. The focus of this dissertation will be the opti
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13

I-Hsien and 陳宜嫺. "The phenolics stability in cranberry juice and the repairment of the ethyl acetate extract and its separated fractions on damaged ARPE-19 cells irradiated by blue light." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/86047468219631770590.

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碩士<br>中山醫學大學<br>營養學研究所<br>96<br>Cranberry shows high antioxidation and biological activities, including anticancer, prevention of cardiovascular disease, prevention of urinary tract infection, prevention of gastric ulcer and so on. Cranberry contains abundant phenolics. Thus this study was focused on the storage stability of phenolics in cranberry and its effect on age-related macular degeneration（AMD）. The results showed that the phenolics in cranberry would reduced. The free quercetin showed the best stability. And the flavonoids and proanthocyanidins were the second. The total phenolics sho
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14

Clemente, Joyce S. "Soil Organic Matter Composition Impacts its Degradability and Association with Soil Minerals." Thesis, 2012. http://hdl.handle.net/1807/33966.

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Soil organic matter (OM) is a complex mixture of compounds, mainly derived from plants and microbes at various states of decay. It is part of the global carbon cycle and is important for maintaining soil quality. OM protection is mainly attributed to its association with minerals. However, clay minerals preferentially sorb specific OM structures, and clay sorption sites become saturated as OM concentrations increase. Therefore, it is important to examine how OM structures influence their association with soil minerals, and to characterize other protection mechanisms. Several techniques, w
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15

Ressurreição, Sandrine Katy Matias da. "Estudo in vitro da solubilidade micelar do colesterol de Cymbopogon citratus e suas frações fenólicas – Otimização de metodologia e aplcação." Master's thesis, 2019. http://hdl.handle.net/10316/88175.

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Dissertação de Mestrado em Química Farmacêutica Industrial apresentada à Faculdade de Farmácia<br>O colesterol é um composto de natureza lipídica, essencial ao funcionamento de todas as células do organismo humano, podendo ser sintetizada a nível endógeno. Cerca de 30 a 40% é sintetizado pelo organismo, sendo o restante obtido pela alimentação, em particular por ingestão de produtos de origem animal. As doenças cardiovasculares são a principal causa de morte e hospitalização nos países desenvolvidos e tem vindo a aumentar nos países em via de desenvolvimento. São diversos os fatores de risco,
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16

Cherdchim, Banyat. "Actions of lignocellulolytic enzymes on Abies grandis(grand fir) wood for application in biofuel production." Doctoral thesis, 2010. http://hdl.handle.net/11858/00-1735-0000-0006-B138-4.

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