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Dissertations / Theses on the topic 'Trans isomers of fatty acids'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Marais, Christiaan De Wet. "The determination of cis and trans fatty acid isomers in partially hodrogenated plant oils /." Link to online version, 2007. http://hdl.handle.net/10019/399.

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2

Loor, Juan Jose. "Alterations in Mammary Gland Synthesis and Secretion of Fatty Acids in Response to Trans Isomers of Octadecenoic Acid or Conjugated Linoleic Acid Isomers." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27187.

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Experiments were conducted to investigate: 1) production of trans-18:1 and cis/trans-18:2 isomers due to input of forage and corn grain in continuous culture fermenters, 2) concentrations of trans-18:1 and cis/trans-18:2 isomers in blood and milk fat of grazing cows fed a grain supplement containing solvent- or mechanically-extracted soybean meal, 3) plasma and milk fatty acid profiles of lactating cows in response to a conjugated linoleic acid (CLA) mixture infused into the rumen, and 4) effects of cis9,trans11-18:2 (9/11CLA) or trans10,cis12-18:2 (10/12CLA) on de novo synthesis and desaturat

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3

Marais, Christiaan De Wet. "The determination of cis and trans fatty acid isomers in partially hydrogenated plant oils." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/2628.

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Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2007.<br>Trans isomers are formed during the partial hydrogenation process of cis unsaturated fatty acids. The major source of trans fatty acids in the normal person's diet is from margarines and shortenings made from these partially hydrogenated plant and marine oils. In addition to influencing lipid risk factors for cardiovascular disease, trans fatty acids have also been implicated in breast cancer, and in poor fetal development and reduced early infant growth. In reality, trans fatty acids have been consumed for cent

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4

Pocienė, Ieva. "Lietuviškų žuvies gaminių saugos įvertinimas riebalų rūgščių trans izomerų atžvilgiu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_095308-79129.

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Pastaraisiais dešimtmečiais atliktų tyrimų rezultatai rodo, jog gyventojų mitybos įpročiai palaipsniui blogėja, mažiau kreipia dėmesį į suvartojamų riebalų, kalorijų kiekį. Tai įtakoja nutukimą, sergamumą širdies ir kraujagyslių ligomis, cukriniu diabetu, skatina onkologinių ligų atsiradimą. Pasaulio sveikatos organizacija (PSO) rekomenduoja, kad trans riebalų rūgštys sudarytų mažiau nei 1 proc. nuo bendrojo energijos suvartojimo kiekio. Darbo tikslas: Įvertinti lietuviškų gaminių saugumą riebalų rūgščių trans izomerų atžvilgiu. Tyrimo uždaviniai: 1. Literatūros apie riebalų rūgščių trans izom

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5

Shafer, Brian David. "Concentrations of Conjugated Linoleic Acid Isomers in Human Plasma Reflect Intake of Dairy Products with Enhanced cis-9, trans-11 or tran-10, cis-12 Isomer Content." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33835.

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Dairy products are a primary source of c9, t11-CLA, an anti-carcinogenic agent, in the diet of humans. The t10, c12-CLA isomer, typically in trace amounts in bovine milk fat, also may benefit human health. Four cows received abomasal infusions of c9, t11-CLA or t10, c12-CLA to obtain milk fat used to prepare butter and yogurt with enhanced c9, t11-CLA or t10, c12-CLA content. Human subjects (3 males, 3 females, ages 22 to 29) received CLA-enhanced butter and yogurt (14% of total kcal) in a crossover study with 2-wk periods. Prior to the study (2 wk) and during a 2-wk washout period between

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6

Мінаєва, Ю. А., та Л. П. Сидорова. "Ідентифікація транс-ізомерів жирних кислот в маслах та спредах". Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67695.

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Останнім часом на ринку України присутня значна кількість фальсифікованої продукції. Найчастіше фальсифікують молочні продукти. Для цього використовують гідрогенізовані рослинні жири, які вміщують у своєму складі жирні кислоти у формі транс-ізомерів. Сучасні дослідження показують, що транс-ізомери жирних кислот (ТІЖК) не засвоюються в нашому організмі природним біологічним шляхом. Накопичуючись в організмі людини, знижують імунітет, порушують роботу ферментів, клітинних мембран.

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7

Higgs, Warren. "Implications of trans isomers of arachidonic and eicosapentaenoic acids on immune / inflammatory cell activity." Thesis, Queen Margaret University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394550.

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8

Vargas, Bello Pérez Einar. "Plasma transport and mammary uptake of trans fatty acids in dairy cows." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12179/.

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In this thesis, aspects of metabolism of lipids in dairy cows were studied, particularly 18:1 trans fatty acid (tFA) concentrations in plasma and lipoprotein fractions, and transportation of FA in epithelial mammary gland cell cultures. Two in vivo studies were conducted to elucidate which lipoprotein fractions were involved in bovine plasma transport of tFA by infusing oils that induced different plasma tFA profiles. Fatty acid profiles of plasma and lipoprotein fractions [high (HDL), low (LDL), and very low density (VLDL) lipoprotein fractions] were analysed. Results showed that VLDL fractio

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9

Sabarense, Céphora Maria. "Avaliação do efeito dos ácidos graxos trans sobre o perfil dos lipídios teciduais de ratos que consumiram diferentes teores de ácidos graxos essenciais." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/9/9132/tde-31072003-113437/.

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Os ácidos graxos trans competem com os ácidos graxos essenciais inibindo as enzimas envolvidas na síntese dos ácidos graxos polinsaturados de cadeia longa. Quantidades adequadas de ácidos graxos essenciais na dieta minimizam este efeito. No entanto, pouco se conhece da ação dos isômeros trans, sob condições de restrição ou deficiência dietética dos ácidos graxos essenciais, sobre o percentual de deposição tanto dos próprios isômeros trans, como dos ácidos graxos polinsaturados nos lipídios dos tecidos. Foram avaliadas dietas ricas em ácidos graxos trans e com diferentes concentrações de ácidos

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10

Wang, Zherun, and 王浙潤王浙润. "Intake of trans fatty acid and risk of cardiovascular disease in Asian population : a systematic review." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206974.

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Background Many studies in western countries have suggested a positive association between intake of trans fatty acid (TFA) and risk of cardiovascular diseases (CVDs). In Asia, although intake of TFA was relatively low, it evidenced an increasing trend which was accompanied with an increasing prevalence of CVDs among the population. There was currently no systematic review on the relationship between intake of TFA and CVDs in Asian population. This systematic review was aimed to synthesize the association between intake of TFA and the risk of CVDs in Asian population from published literatur

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11

Muchecha, Sousa Gastão. "Avaliação do perfil em ácidos gordos trans da carne bovina no mercado português." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2022. http://hdl.handle.net/10400.5/23268.

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Dissertação de Mestrado em Segurança Alimentar<br>A composição de ácidos gordos (AG) da carne bovina é um aspeto que os consumidores consideram importante, e a carne de ruminantes tem sido criticada por razões nutricionais devido à sua contribuição para a ingestão total de ácidos gordos saturados (AGS), os quais estão associados à incidência de doenças metabólicas. O objetivo deste trabalho consistiu na caracterização do perfil dos AG, em particular AG trans, na carne de raças bovinas portuguesas ou produzidas e comercializadas em Portugal. As amostras de carne bovina certificadas e não certi

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12

Barcelos, Raquel Cristine Silva. "INFLUÊNCIA DA SUPLEMENTAÇÃO DE DIFERENTES ÁCIDOS GRAXOS SOBRE O FOTODANO DA PELE INDUZIDO PELA EXPOSIÇÃO DE ROEDORES À RADIAÇÃO ULTRAVIOLETA." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/3853.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Diet fatty acids (FA) are fundamental to the phospholipids structure and function of cell membranes, in which long chain polyunsaturated FA (PUFA) increase its fluidity, while the trans FA (TFA) to make it more rigid. Also, the barrier function and hydration are highly dependent on the skin composition and structure, as well as the organization of lipids in the cell matrix. In recent years, the ozone layer depletion has increased human exposure to ultraviolet radiation (UVR), inducing deleterious effects on skin homeostasis. Moreov

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13

Matthan, Nirupa Rachel. "Impact of hydrogenated fat consumption on in vivo lipid metabolism in moderately hypercholesterolemic women." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0033/NQ64617.pdf.

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14

Ishlak, Adel. "ALTERING THE FORMATION OF TRANS FATTY ACIDS IN CONTINUOUS CULTURES THROUGH OILS AND NATURAL DIETARY SUPPLEMENTATIONS." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/dissertations/711.

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15

GUDLA, PRAMOD REDDY. "EFFECT OF FORAGE LEVEL AND OIL SUPPLEMENTATION ON FERMENTATION, TRANS FATTY ACIDS PRODUCTION AND RUMINAL BACTERIA." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/543.

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Conjugated linoleic acids (CLA) are unique group of trans fatty acids formed during the biohydrogenation (BH) of unsaturated fatty acids by rumen microorganisms. The reported health benefits of CLA in recent human studies have increased researchers' interest in enhancing their concentrations in ruminants dairy and meat products. Despite the great successes seen in increasing milk CLA by dietary means, little information has been presented about the effect of CLA-enhancing diets on rumen microorganisms, particularly bacterial species involved in the BH process. Identifying the rumen bacteria re

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16

Fardin-Kia, Ali Reza [Verfasser], Gerhard [Akademischer Betreuer] Jahreis, Jan [Akademischer Betreuer] Fritsche, and Sebastiano [Akademischer Betreuer] Banni. "Development of novel methods for separation of trans fatty acids and other nutritionally relevant or related fatty acids / Ali Reza Fardin-Kia. Gutachter: Gerhard Jahreis ; Jan Fritsche ; Sebastiano Banni." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2014. http://d-nb.info/1053959346/34.

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17

Brown, David A. "THE EFFECT OF ALL-TRANS RETINOIC ACID AND FATTY ACIDS ON MCF-7 BREAST CANCER CELL PROGRESSION." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/180.

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Vitamin A metabolites and retinoids may slow the progression of breast cancer and elicit anti-neoplastic properties similar to those of omega-3 fatty acids. Studies using animal models show a decrease in the incidence, growth and metastisis of mammary tumors in the presence of specific fatty acids. This effect is also seen with use of retinoids, specifically all-trans retinoic acid (AtRA). Thus, fatty acids may also alter retinoid homeostasis in mammary carcinoma cells (MCF-7s). The potential for inter/co dependency among fatty acids and retinoids is considerable, and here it has been hypothes

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18

Gioielli, Luiz Antonio. "Desenvolvimento de bases gordurosas para margarinas cremosas por interesterificação." Universidade de São Paulo, 1985. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-18032008-081014/.

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O trabalho teve por objetivo o desenvolvimento de bases gordurosas para margarinas utilizando o método de modificação por interesterificação, como alternativa ao processo de hidrogenação parcial, que forma isômeros trans.<br>The aim of the study was to develop soft margarines by using intertesterification, as an alternative of hydrogenation, which forms trans isomers.

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19

Ma, Kangming 1965. "Peroxide value and trans analyses by Fourier transform infrared (FTIR) spectroscopy." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36643.

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New Fourier transform infrared (FTIR) approaches for the quantitative determination of peroxide value (PV) and isolated trans analyses were investigated and developed. The FTIR-PV methods investigated were all based on the stoichiometric reaction of hydroperoxides and triphenylphosphine (TPP) which converts TPP to triphenylphosphine oxide (TPPO). A reference transmission cell (100 mum) method was developed based on the use of a unique TPPO absorption at 542 cm-1. This method covered PV values from 0--15 PV and was shown to be superior in accuracy and reproducibility to the standard American Oi

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20

Baughman, Curtis Andrew. "Influence of in vitro elaidic acid or trans-vaccenic acid uptake and lactogenic hormone stimulation on fatty acid content of mouse mammary cells." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/45087.

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The objective of the study was to examine the effects of trans-9-octadecenoic acid (elaidic) and trans-II-octadecenoic acid (trans-vaccenic) on uptake and alteration of exogenous fatty acids by mouse mammary epithelial cells. Cells from a subclone of the COMMA-D cell line were plated on uncoated plastic petri dishes and grown to confluence. Supplemental fatty acids bound to bovine serum albumin were added to the medium applied to the confluent cell cultures. Treatments included 200 JlM octadecanoic acid (CI8:0) as a control and 100 JlM CI8:0 with one of the following JlM ratios of cis-octade

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21

Dragana, Šoronja-Simović. "Uticaj sastava masne faze margarina na fizičke osobine i kvalitet peciva od laminiranog testa." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2009. https://www.cris.uns.ac.rs/record.jsf?recordId=71234&source=NDLTD&language=en.

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U radu je ispitana mogućnost primene margarina za laminiranje smanjenog sadržaja trans masnih kiselina u izradi lisnatog peciva. U prvoj fazi eksperimentalnog rada ispitivanjem uticaja vrste (MZ1 i MZ2) i količine margarina za zames (1, 3 i 5% na masu bra&scaron;na) i količine emulgatora (0,1, 0,3, i 0,5% na masu bra&scaron;na), kao i njihove interakcije na fizičke osobine testa i kvalitet peciva, definisan je sirovinski sastav osnovnog testa, koji obezbeđuje optimalnu obradivost tokom laminiranja. Rezultati merenja empirijskih i fundamentalnih reolo&scaron;kih pokazatelja kvaliteta osnovnog t

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22

Bottan, Tatiane. "Avaliação dos teores de ácidos graxos em alimentos comercializados na cidade de São Paulo." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/6/6138/tde-29092010-082826/.

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Os ácidos graxos (AGs) trans foram largamente utilizados pela indústria de alimentos. Entretanto, seu consumo tem sido associado a problemas de saúde, principalmente ao aumento do risco para doenças coronarianas. No Brasil, desde 2006, o conteúdo de gorduras trans obrigatoriamente precisa ser informado nos rótulos dos alimentos industrializados. Aparentemente, isso fez surgir diversos produtos que declaram não conter gorduras trans e que tradicionalmente os continham em grandes concentrações. Dessa forma, o objetivo desse trabalho foi avaliar a oferta atual desses alimentos. Para tanto, a prop

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23

Figueiredo, Roberta Marcondes Machado. "Efeito dos ácidos graxos saturados, poli-insaturados e trans no desenvolvimento de aterosclerose e esteatose hepática em camundongos com ablação gênica do receptor de LDL." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/5/5135/tde-18012013-145918/.

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Introdução: A quantidade e o tipo de gordura alimentar exercem importante influência no desenvolvimento de doença cardiovascular (DCV) e podem contribuir para o desenvolvimento de esteatose hepática. Os ácidos graxos saturados e trans são consensualmente apontados como aterogênicos; já os poli-insaturados parecem exercer ação antiaterogênica. Com relação a esteatose hepática, sabe-se que os ácidos graxos saturados estão associados com o seu desenvolvimento; porém, a ação dos ácidos graxos trans na gênese e no desenvolvimento de esteatose hepática não está totalmente elucidada. Neste estudo, av

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24

Young, Reuben Sam Erskine. "Mapping changes to lipid metabolism within cancer using next-generation mass spectrometry technologies." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/225933/1/Reuben_Young_Thesis.pdf.

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This thesis developed new methods to probe the molecular structure of lipids (fats) that are key components of cellular membranes. Applications of these technologies led to the discovery of previously undescribed lipids and allowed the mapping of their formation and fate in cancer cells and tissues. These fundamental insights into cancer metabolism suggest new targets for the detection and treatment of cancer.

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25

Trevizol, Fabíola. "Influência dos diferentes ácidos graxos da dieta sobre um modelo animal de mania induzido por anfetamina em ratos." Universidade Federal de Santa Maria, 2010. http://repositorio.ufsm.br/handle/1/11125.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Fatty acids (FA) are constituent important of the neuronal phospholipids membranes and they carry out important functions in the development and function of the brain During the last decades changes were observed in the feeding habits of western countries, with an increase of the trans FA and omega-6 (n-6) and detriment of omega-3 fatty acids (n-3) consumption, contributing to increase the oxidative stress (OS) generation and development of neuropsychiatric disorders. The influence of FA supplementation containing n-6 (soybean oil-

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Gao, Lei. "Determination of quantitative nutritional labeling compositional data of lipids by Nuclear Magnetic Resonance (NMR) spectroscopy." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111577.

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The application of Nuclear Magnetic Resonance (NMR) spectroscopy in the determination of nutrition labeling component data (NLCD) was investigated, with the intent of using this methodology as a primary method to calibrate FTIR instrumentation for NLCD confirmation or screening on a routine basis. Unlike previous NMR studies, this work used three strategies to attain accuracy and reproducibility of NLCD through: (i) appropriate setting of operational parameters for spectral acquisition; (ii) resonance selection by optimizing the signal in proportion to the nuclei population and (iii) integrati

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Snežana, Kravić. "Određivanje trans masnih kiselina u prehrambenim proizvodima gasnom hromatografijom-masenom spektrometrijom." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2010. https://www.cris.uns.ac.rs/record.jsf?recordId=82631&source=NDLTD&language=en.

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U okviru doktorske disertacije optimizovani su uslovi određivanjametilestara masnih kiselina, uključujući i trans izomere, primenomkapilarne gasne hromatografije–masene spektrometrije, nakapilarnoj koloni SP-2560 (dužina x unutra&scaron;nji prečnik: 100 m x0,25 mm, debljina sloja stacionarne likvidne faze 0,20 μm,biscijanopropil polisiloksan). Kori&scaron;ćenjem standarnih rastvorametilestara masnih kiselina optimizovani su temperaturni program,odnos razdeljivanja i uslovi akvizicije podataka SCAN tehnikom.Razvijena je metoda za pripremu uzoraka u cilju određivanja sastavamasnih kisel

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Avila, Stagno Jorge. "An examination of the effects of using glycerol and wheat dry distillers grains with soluble in sheep diets." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10410.

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AN EXAMINATION OF THE EFFECTS OF USING GLYCEROL AND WHEAT DRY DISTILLERS’ GRAINS WITH SOLUBLES IN SHEEP DIETS The aims of this research were to assess the effects of feeding glycerol and wheat based dry distillers’ grains with solubles (WDDGS) on rumen metabolism, performance, carcass characteristics and fatty acid composition of adipose tissue of lambs. In study 1, increasing levels of glycerol as replacement of barley grain in in vitro batch cultures did not affect culture pH and total methane (CH4) production, but in vitro dry matter disappearance, total VFA production and propionate propo

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Teixeira, Angelica Martelli. "SUPLEMENTAÇÃO DE ÁCIDOS GRAXOS E ATIVIDADE FÍSICA SOBRE OS DISTÚRBIOS DO MOVIMENTO, MEMÓRIA E ANSIEDADE EM RATOS: PARÂMETROS COMPORTAMENTAIS E BIOQUÍMICOS." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/3851.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Fatty acids (FA) from the diet play a key role in the architecture of brain membrane phospholipids, and can modify plasticity and fluidity, acting decisively in the development of cognitive and neuropsychiatric disorders. Healthy lifestyle habits include balanced diet and physical activity, which has regularly been described as a form of rehabilitation or prevention of diseases affecting the CNS. This study was initially designed to evaluate the influence of regular exercise in preventing oxidative damage commonly induced by halope

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Pase, Camila Simonetti. "INFLUÊNCIA DE DIFERENTES ÁCIDOS GRAXOS SOBRE PARÂMETROS COMPORTAMENTAIS E OXIDATIVOS EM RATOS SUBMETIDOS AO ESTRESSE AGUDO." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/8988.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The fatty acids (FA) are important constituents of brain phospholipid membranes and play important roles in the central nervous system (CNS) may modify the plasticity and fluidity, and act decisively in the development of cognitive and neuropsychiatric disorders. During the last decades, we observed changes in eating habits, which enabled increased consumption of trans fatty acids at the expense of consumption of polyunsaturated fatty acids (PUFA), especially omega-3. Furthermore, frequent situations of stress due to pressure of

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Kuhn, Fábio Teixeira. "PREFERÊNCIA CONDICIONADA A PSICOESTIMULANTE EM RATOS JOVENS APÓS SUPLEMENTAÇÃO COM DIFERENTES ÁCIDOS GRAXOS." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/8995.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Western diet has undergone major changes in recent decades, mainly due to the large consumption of processed foods and fast foods, which contains a large proportion of fats rich in trans fatty acids (TFA). Polyunsaturated fatty acids (PUFA) are essential components of the neuronal membranes, and the main PUFAs are the omega-3 series (n-3) and omega 6 (n-6), which are obtained solely from the diet. Trans fatty acids (TFAs) can inhibit the activity of enzymes such as desaturases and elongases, and also compete with PUFA for incorpora

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Pavan, Rosângela. "Avaliação dos teores de ácidos graxos trans em margarinas e cremes vegetais após a resolução RDC 360 (ANVISA)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-16102009-095537/.

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A ingestão de ácidos graxos trans tem sido consistentemente mostrada ter efeitos adversos nos lipídeos sanguíneos, principalmente na razão LDL:HDL colesterol, que é um forte marcador de risco cardiovascular. De acordo com a Resolução RDC (Resolução da Diretoria Colegiada) de número 360 da ANVISA, de 23 de dezembro de 2003 da ANVISA, (Agência Nacional de Vigilância Sanitária), após 1 de agosto de 2006 as indústrias de alimentos devem declarar o conteúdo de ácidos graxos trans por porção do produto. O objetivo deste trabalho foi analisar a composição de ácidos graxos trans em margarinas e cremes

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Douniama-Lonn, Gré Véronique. "Fractionnement par cristallisation extractive à froid des acides gras libres et des triglycérides de l'huile de Nephelium Lappaceum L. (Ramboutan) : oxygénation et enrichissement en acides gras particuliers." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0129/document.

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Dans cette étude, les fruits du Nephelium Lappaceum L. (ramboutan) ont été récoltés en Mars 2015 à Boko, dans la zone sud de la République du Congo. Plante à graines oléagineuses avec un noyau riche en huile (36 %), particulièrement composée d’acides gras saturés et monoinsaturés à longues chaines : C16:0 4,84 %, C18:0 5,48 %, C18:1 45,62 %, C18:2 2,70 %, C20:0 26,53 %, C20:1 9,27 % et C22:0 2,64 %. L’huile de ramboutan a été hydrolysée par voie enzymatique en présence de lipase Candida rugosa, les acides gras libres sont obtenus avec un ratio acides gras saturés (AGS)/acides gras monoinsaturé

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Kaleem, Muhammad. "Effets des produits d'oxydation de l'acide linoléique sur sa biohydrogénation ruminale." Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0042/document.

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La biohydrogénation (BH) ruminale des acides gras polyinsaturés (AGPI) est à l’origine de la production d’AG trans pouvant se retrouver dans les productions de ruminants, dont le lait. Parmi ceux-ci, les isomères t11 auraient des effets bénéfiques pour la santé des consommateurs alors que les isomères t10 sont potentiellement défavorables. En élevage, l’apport de graines oléagineuses dans la ration des vaches permet d’augmenter la teneur du lait en ces acides gras. Or ces graines sont souvent distribuées chauffées pour améliorer leur valeur nutritionnelle. Expérimentalement, les effets des gra

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Lerch, Sylvain. "Supplémentation en colza ou en lin de rations à base d’herbe chez la vache laitière durant deux lactations consécutives : effets sur les performances zootechniques et la composition fine en acides gras du lait." Thesis, Clermont-Ferrand 2, 2012. http://www.theses.fr/2012CLF22238/document.

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L’apport de graines oléagineuses dans la ration de la vache laitière pendant 1 à 3 mois pourrait améliorer la qualité nutritionnelle du lait, mais également pénaliser dans certains cas les performances zootechniques. Peu de données sont disponibles sur les effets de ces stratégies alimentaires sur de plus longues périodes. L’objectif de cette thèse est de quantifier au cours de 2 lactations consécutives, les effets de supplémentations en lin ou en trois différentes formes de colza de rations à base d’herbe conservée en hiver et pâturée en été sur les performances zootechniques de la vache lait

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Claudino, Mauro. "Thiol−ene Coupling of Renewable Monomers : at the forefront of bio-based polymeric materials." Licentiate thesis, KTH, Ytbehandlingsteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-40267.

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Plant derived oils bear intrinsic double-bond functionality that can be utilized directly for the thiol–ene reaction. Although terminal unsaturations are far more reactive than internal ones, studies on the reversible addition of thiyl radicals to 1,2-disubstituted alkenes show that this is an important reaction. To investigate the thiol–ene coupling reaction involving these enes, stoichiometric mixtures of a trifunctional propionate thiol with monounsaturated fatty acid methyl esters (methyl oleate or methyl elaidate) supplemented with 2.0 wt.% Irgacure 184 were subjected to 365-nm UV-irradia

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Chisaguano, Tonato Aida Maribel. "Papel de los ácidos grasos trans (AGT) y ácidos grasos poliinsaturados de cadena larga (AGPI-CL) en el desarrollo de enfermedades atópicas en la primera etapa de la vida." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/272661.

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La composición de ácidos grasos poliinsaturados de cadena larga (AGPI-CL) en los tejidos humanos es esencial para mantener las funciones metabólicas y la salud. Diferentes patologías, incluidas las enfermedades atópicas, han sido relacionadas con los niveles de AGPI-CL. Además de la dieta, un factor que influye en la composición de los AGPI-CL en los tejidos humanos es la síntesis de novo de los mismos. En este proceso, los AGPI-CL son sintetizados a partir de AG esenciales a través de diferentes etapas de desaturación y elongación. Las enzimas que participan son las desaturasas: Δ5-desaturasa

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Mayer, Júlia Gonçalves. "Comparação da análise de ácidos graxos TRANS em biscoito por cromatografia gasosa acoplada a espectrometria de massas (cg-em) e por espectroscopia no infravermelho com transformada de fourier e reflectância total atenuada (FT-IR-ATR)." Niterói, 2018. https://app.uff.br/riuff/handle/1/5892.

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Submitted by Biblioteca da Faculdade de Farmácia (bff@ndc.uff.br) on 2018-03-05T14:14:06Z No. of bitstreams: 1 JÚLIA GONÇALVES MAYER.pdf: 2883327 bytes, checksum: 6ae955490e1664e27d2c9669ad07a02c (MD5)<br>Made available in DSpace on 2018-03-05T14:14:06Z (GMT). No. of bitstreams: 1 JÚLIA GONÇALVES MAYER.pdf: 2883327 bytes, checksum: 6ae955490e1664e27d2c9669ad07a02c (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Os métodos analíticos utilizados para medir o percentual de ácido graxo trans (AGT) em alimentos envolvem cromatografia em fase gasosa com detecção de ionização

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Cerrato, Giulia. "Oleate : An Atypical Cellular Stress Inducer That Stalls Protein Secretion Oleate-Induced Aggregation of LC3 at the Trans-Golgi Network Is Linked to a Protein Trafficking Blockade A Genome-Wide RNA Interference Screen Disentangles the Golgi Tropism of LC3 Live Cell Imaging of LC3 Dynamics." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASL023.

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Les diverses classes d’acides gras (chaines carbonées saturées ou cis-/trans- insaturées) influencent la physiologie au niveau de la cellule et de l’organisme de façon différente. Curieusement, ces catégories distinctes ont un effet important (mais différent) sur l’autophagie, le mécanisme intracellulaire de dégradation qui maintient l’homéostasie énergétique et protège les cellules contre le stress. L’oléate, l’acide gras cis-insaturé endogène et alimentaire le plus abondant, possède la propriété atypique d’induire une redistribution de la protéine LC3 (signe particulier d’autophagie) de mani

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Liu, Wen-Hung, and 劉文弘. "Analysis and Formation of Trans Fatty Acids inFried FoodsAnalysis and Formation of Trans Fatty Acids inFried FoodsAnalysis and Formation of Trans Fatty Acids in Fried Foods." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/86204889105344475215.

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碩士<br>輔仁大學<br>食品營養學系<br>94<br>Hydrogenated oil has been widely applied in baking products, frying products and margarine. Thus, trans fatty acids could be found in most of the food products. Epidemiological studies have shown that the intake of excessive amount of trans fatty acids may increase the cholesterol content in blood and lead to occurrence of cancer. The objectives of this research were to develop an improved method for analysis of trans fatty acids and study their formation in fried oil and foods. Both chicken legs and French fries were fried in soybean oil or hydrogenated soybean o

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Hsu, Ya-Pin, and 徐雅萍. "The Study of Preparation of Trans Fatty Acids and Effect of Dietary Trans Fatty Acids on Lipid Metabolism in Hamsters." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/07760710529266999533.

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"The inhibitory effect of trans fatty acids on maternal and neonatal essential fatty acid metabolism." 1997. http://library.cuhk.edu.hk/record=b5889120.

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by Kwan Kwok Yiu.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1997.<br>Includes bibliographical references (leaves 145-155).<br>Acknowledgment --- p.i<br>Abstract --- p.ii<br>List of Tables --- p.vii<br>List of Figures --- p.x<br>List of Abbreviations --- p.xii<br>Chapter Chapter 1 --- Literature review<br>Chapter 1.1 --- Historical background --- p.1<br>Chapter 1.2 --- Chemistry of trans and cis fatty acids --- p.3<br>Chapter 1.3 --- Dietary source of trans fatty acids --- p.6<br>Chapter 1.4 --- Consumption of trans fatty acids among Western countries --- p.9<br>Chapter 1.5

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LU, YI-XUAN, and 盧憶萱. "Effect of dietary trans fatty acids on lipid metabolism in rats." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/70581803620622856028.

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Elias, Sandra Leanne. "Relations of trans fatty acids, cis n-6 and n-3 fatty acids in newborn cord plasma, maternal plasma and diet." Thesis, 1999. http://hdl.handle.net/2429/9308.

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Trans fatty acids (TFA) are found in partially hydrogenated oils used in margarines, and in processed foods. Concern has been raised that TFA may inhibit desaturation of 18:2n-6 and 18:3n-3 to 20:4n-6 and 22:6n-3, respectively, which are necessary for normal growth and development. The effect of diet-derived TFA on human growth, however, is unclear. This study estimated intakes and major sources of dietary TFA in 60 women at 28 and 35 weeks gestation using a food frequency questionnaire. Maternal blood was collected at 35 weeks gestation. Cord blood was collected at birth to assess the

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Tong, Li-An, and 童理安. "Investigation of trans fatty acids in commercial foods and the effect of different thermal processing conditions on trans fatty acid formed from foods." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/45117187278749508682.

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碩士<br>國立嘉義大學<br>食品科學系研究所<br>97<br>Excessive intake of trans fatty acids may increase the levels of blood and cholesterol LDL-C (low density lipoprotein cholesterol), leading to an increased LDL-C/HDL-C ratio and risk of cardiovascular diseases. The objectives of this study were to investigate the contents of trans fatty acids and saturated fatty acids in commercial food products by using GC (gas chromatography) method. The effects of different thermal processing methods (including roasting, frying, microwave heating and UV irradiation) on trans fatty acid formation in foods and oils (including

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Dupasquier, Chantal Marie Christine. "The effects of consuming fatty acids from different sources on atherosclerotic development." 2009. http://hdl.handle.net/1993/3185.

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It is becoming increasingly evident that the development of atherosclerotic coronary heart disease (CHD) can largely be regulated by lifestyle and dietary choices. The type of fatty acids regularly consumed may promote or prevent atherogenesis. Flaxseed, the richest plant source of the omega-3 fatty acid alpha-linolenic acid (ALA) is thought to protect against atherosclerotic disease. However, the mechanism(s) by which flaxseed exerts these anti-atherogenic effects requires further investigation. Alternatively, there are dietary fatty acids that are thought to induce significant deleterious ef

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Chen, Chao-Lin, and 陳昭霖. "Determination of trans Fatty Acids Composition in Foods by Fourier Transform Infrared Spectroscopy." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/92746611127838808975.

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碩士<br>國立屏東科技大學<br>食品科學系<br>94<br>Abstract Most unsaturated fatty acids existed as cis configuration in nature, whereas trans fatty acids primarily occurred from the hydrogenation process of edible oils and fats. Many clinical research reports concluded that trans fatty acids would significantly increase the risk of coronary diseases. Federal Food and Drug Administration (FDA) has regulated the mandatory labeling of the trans fatty acid contents and enforced from January, 2006. All food processing sectors would face the impacts of trans fatty acid detections. This thesis discussed the anal

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Hung, Wei-Lun, and 洪偉倫. "Trans Fatty Acids - Culprits of Alzheimer''s Disease and Its Prevention." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/62336917136181376787.

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博士<br>國立臺灣大學<br>食品科技研究所<br>100<br>Trans fatty acids (TFA) are unsaturated fatty acids with at least one double bond in the trans-configuration. Some studies have shown that TFA are not only obtained exogenously from food intake, but also generated endogenously by free radicals. Alzheimer’s disease (AD) is a progressive and neurodegenerative disease. Oxidative stress induced by beta-amyloid peptide (Aβ) was considered as a critical component in the pathogenesis of AD. The aim of this study was to investigate the correlation between TFA and AD. In photochemical reaction assay, trans arachidonic

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Wu, Hsing Ping, and 吳星屏. "Investigate the contents of trans fatty acids in commercially partial hydrogenated oil and bakery products." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/33008599762126091230.

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碩士<br>輔仁大學<br>營養科學系<br>96<br>Many researches showed that trans fatty acids (TFA) may increase blood total cholesterol, low density lipoprotein-cholesterol (LDL-C) and decrease high density lipoprotein-cholesterol (HDL-C), lead to influence human health. Many western countries have positively focused on nutrition label of TFA content in food management. The nutrition label of TFA on food packing has also been ruled from January, 2008. The aim of present study were to survey the TFA content of some materials and products derived from partially hydrogenated oil. The experimental samples divided i

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Peralta, Contreras Mayeli. "Determination of trans fatty acids by mid infrared fourier transform spectroscopy with or without nanomaterials." 2007. http://purl.galileo.usg.edu/uga%5Fetd/peralta-contreras%5Fmayeli%5F200708%5Fms.

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