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Letteratura scientifica selezionata sul tema "Fatty acid"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 16 gennaio 2024

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Articoli di riviste sul tema "Fatty acid"

Tso, P., A. Nauli e C. M. Lo. "Enterocyte fatty acid uptake and intestinal fatty acid-binding protein". Biochemical Society Transactions 32, n. 1 (1 febbraio 2004): 75–78. http://dx.doi.org/10.1042/bst0320075.

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This article reviews our current understanding of the uptake of fatty acids by the enterocytes of the intestine. The micellar solubilization of fatty acids by bile salts and the factors regulating that process are discussed. The mechanism of how micellar solubilization of fatty acids promotes the uptake of fatty acids by enterocytes and their relative importance is reviewed. Additionally, discussion of the various fatty acid transporters located at the brush border membrane of the enterocytes is included. Finally, a summary of our current understanding of the function of fatty-acid-binding proteins inside enterocytes is provided.

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Wilkinson, T. C., e D. C. Wilton. "Studies on fatty acid-binding proteins. The binding properties of rat liver fatty acid-binding protein". Biochemical Journal 247, n. 2 (15 ottobre 1987): 485–88. http://dx.doi.org/10.1042/bj2470485.

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1. The fluorescent fatty acid probe 11-(dansylamino)undecanoic acid binds to rat liver fatty acid-binding protein with a 1:1 stoichiometry. 2. The binding of the fluorescent probe is competitive with long-chain fatty acids. 3. Binding displacement studies were performed with a wide range of fatty acids and other ligands and identified C16 and C18 fatty acids as the preferred fatty acids for rat liver fatty acid-binding protein. No preference was observed for unsaturated fatty acids within this group. 4. Fatty acyl-CoA binds less well than the corresponding fatty acid.

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Jie, Marcel S. F. Lie Ken, Mohammed Khysar Pasha e M. S. K. Syed-Rahmatullah. "Fatty acids, fatty acid analogues and their derivatives". Natural Product Reports 14, n. 2 (1997): 163. http://dx.doi.org/10.1039/np9971400163.

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S. F. Lie Ken Jie, Marcel, e Mohammed Khysar Pasha. "Fatty acids, fatty acid analogues and their derivatives". Natural Product Reports 15, n. 6 (1998): 607. http://dx.doi.org/10.1039/a815607y.

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Temesgen, Melese, Negussie Retta e Etalem Tesfaye. "AMINO ACID AND FATTY ACID COMPOSITION OF ETHIOPIAN TARO". American Journal of Food Sciences and Nutrition 3, n. 1 (5 ottobre 2017): 46–58. http://dx.doi.org/10.47672/ajfsn.217.

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The purpose of this study was designed to investigate the amino acid and fatty acid composition of taro leaf and corm samples. An UHPLC and GC-FID method was used for the determination of amino acids and fatty acid composition, respectively. Taro leaf was processed as a powder and pre-curd concentrates while the corm was pre-gelatinized with and without peel prior to the analysis. The amino acid and fatty acid composition (%) of the analyzed samples were quantified with their relative area comparing with respective standards. In the present study, the leaf and corm of taro contained the three essential amino acids leucine, lysine and methionine. For the study, the calculated amino acid values were low in corm samples, but amino acid composition was higher in the leaf samples. Concerning fatty acids, the dominant fatty acid in the leaf and corm was oleic acid (C18:1, n-9) which ranged from 140.697 ± 0.054 to 216.775 ± 0.043 and 101.932 ± 0.023 to 101.950 ± 0. 04 mg/100 g, respectively. In the study, the fatty acid compositions in leaf were higher than the corm. This means that taro leaf would be considered as a good source of essential amino acid and fatty acid than the corm. Finally, from the proportion (mg/100 g) of saturated, monounsaturated and polyunsaturated fatty acids, the unsaturated fatty acids were the predominant fatty acids observed. The presence of high levels of unsaturated fatty acids in the entire investigation of our study taro is nutritionally rich.

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Kushwaha, Badri Prasad, Deepak Upadhyay, Sultan Singh, Subendu Bikas Maity, Krishna Kunwar Singh e Asim Kumar Misra. "Fatty acid profile of Murrah buffalo milk fat". Buffalo Bulletin 41, n. 1 (25 marzo 2022): 73. http://dx.doi.org/10.56825/bufbu.2022.4113319.

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Milk fatty acid composition of Murrah buffaloes was determined in present study. Samples were collected from 10 lactating buffaloes and were analysed for fatty acid profile using AOCS official method. Murrah milk fat was having 71.6% saturated fatty acids (SFA), 27.97% unsaturated fatty acids. C16:0, C18:1c, C18:0, C14:0 and C12:0 were the five most abundant fatty acid (82.5% of total fatty acids) in the Murrah milk. Palmitic acid, myristic acid (14:0) and stearic acid (18:0) together constituted approximately 85.8% of saturated fatty acids by weight. Short chain fatty acids (C4:0, C6:0), medium chain fatty acids (C8:0, C10:0, C12:0), and long chain fatty acids (C16:0, C18:0, C16:1, C18:2) were 1.82, 4.56 and 49.96 g/100 g respectively. Mono-unsaturated fatty acid were 26.79% of the fatty acids in milk, mostly oleic acid (18:1). Poly-unsaturated fatty acids constitute about 1.18% by weight of the total fatty acids. Linoleic acid (18:2) and α-linolenic acid (18:3) accounted for 0.88 and 0.30% by weight of the total fatty acids.

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Zelenka, J., D. Schneiderova, E. Mrkvicova e P. Dolezal. "The effect of dietary linseed oils with different fatty acid pattern on the content of fatty acids in chicken meat". Veterinární Medicína 53, No. 2 (19 febbraio 2008): 77–85. http://dx.doi.org/10.17221/1985-vetmed.

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Effects of 1, 3, 5 or 7% of linseed oil in the diet on the content of fatty acids in breast and thigh meat were studied in broiler chickens. Oils made either of seeds of the linseed cultivar Atalante (A) with a high content of α-linolenic acid or of the cultivar Lola (L) with a predominating content of linoleic acid were fed from 25 to 40 days of age. When feeding A, the contents of all n-3 polyunsaturated fatty acids (PUFA), including eicosatrienoic acid, were significantly higher, those of n-6 PUFA were lower, and the ratio of n-6/n-3 PUFA was narrower (<I>P</I> < 0.001) than when L was fed. The narrowest n-6 to n-3 PUFA ratio was observed at the content 36 g of α-linolenic acid (58 g A) per kg of the diet while the widest one at 2 g of α-linolenic acid (70 g L) per kg of the diet. When using L, the increasing level of linoleic acid in feed was associated with significantly increasing levels of all n-6 PUFA in meat. The content of all n-3 PUFA increased after the application of oil A, but the dependence for eicosapentaenoic acid in thigh meat was expressed significantly more precisely by the second degree parabola with the maximum at the level of 37 mg of α-linolenic acid and for clupanodonic and docosahexaenoic acids by parabolas with maxima at the level of α-linolenic acid in the diet 41 g and 30 g for breast meat and 35 g and 27 g for thigh meat, respectively. By means of the inclusion of linseed oil with a high content of α-linolenic acid in the feed mixture it would be possible to produce poultry meat with a high content of n-3 PUFA as a functional food.

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Yu, Feng Xiang, Xu Chen, Zu Wu Chen e Xiao Jun Wei. "Fatty Acid Analysis of Edible Oils". Advanced Materials Research 962-965 (giugno 2014): 1222–25. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.1222.

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To research the characteristics of rice bran oil ( RBO) and identify RBO from vegetable oils,33 kinds of rice were collected from China, the fatty acids of rice bran oil, palm oil, rapeseed oil, cottonseed oil, soybean oil, peanut oil, camellia oleosa seed oil were analyzed by Gas Chromatography, the contents were determinated by area normalization method. Fingerprint of RBO is bulid, the similarity of chromatographic fingerprint (SCF) is over 0.998, means that different RBO have the same fatty acid gas chromatographic fingerprint feature. The composition and content are different in the 7 vegetable oils ,that contribute to determinate the adulteration of inexpensive oils to RBO based on SCF. Main fatty acids in peanut oil are palmitic acid, oleic acid, linoleic acid. The characteristic fatty acid is behenic acid C22:0. Main fatty acids in soybean oil are palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid. Proportion of C18:3 is much higher than in RBO when C18:1 is lower obviously. Main fatty acids in cottonseed oil are palmitic acid, oleic acid, linoleic acid. Proportion of C16:0 is much higher than in RBO and C18:1 lower . Main fatty acids in palm oil are palmitic acid, stearic acid, oleic acid, linoleic acid. Decanoic acid C10:0 is one of the characteristic fatty acids ,and C16:0 is much higher than in RBO. Main fatty acids in rapeseed oil are palmitic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, erucic acid.C22:1 is the characteristic fatty acid when little or zero in other oils. Main fatty acids in camellia oleosa seed oil are palmitic acid, oleic acid, linoleic acid.C18:1 is much higher than RBO.

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Veerkamp, Jacques H. "Fatty acid transport and fatty acid-binding proteins". Proceedings of the Nutrition Society 54, n. 1 (marzo 1995): 23–37. http://dx.doi.org/10.1079/pns19950035.

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Gündüz, Leyla Nurefşan, Murat Kazan, Hayat Topçu e Salih Kafkas. "Fatty acids composition in Pistachio". BIO Web of Conferences 85 (2024): 01008. http://dx.doi.org/10.1051/bioconf/20248501008.

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Pistachio (Pistacia vera L.), is an important food source for human health. It has nutritional content rich in protein, fat, fatty acids, fiber, vitamins and minerals. Such as other nuts, pistachio oil is rich in unsaturated fatty acids. Pistachio is rich in omega fatty acids such as n-3, n-6, n-9, it is known to be beneficial in decreasing cholesterol by increasing HDL level in blood plasma. Oleic acid (C18: 1) and palmitoleic acid are the main component of unsaturated fatty acids in pistachio. It has fatty acids such as linoleic acid and alpha linoleic acid among polyunsaturated fatty acids and myristic acid, palmitic acid, stearic acid among saturated fatty acids. Gas chromatography-flame ionization detector (GC-FID) is generally used for the analysis of fatty acids in foods. The main component of unsaturated fatty acids contained in pistachio is oleic acid (C18: 1) and the variety varies between 51.6% and 81.17% according to the origin. Linoleic acid (C18:2) content, which is a polyunsaturated fatty acid, varies between 15% and 30%. Stearic acid content of saturated fatty acids varies between 0.8% and 3.5%. This review provides information about the properties and curent status of the fatty acids in pistachios.

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Tesi sul tema "Fatty acid"

Turk, Stacey N. "Fatty Acid Carcass Mapping". [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2008-05-4.

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West, Annette Lucy. "Studies of fatty acid status in humans given omega-3 fatty acid supplements". Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/405280/.

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Nachtschatt, Matthias Hannes. "Investigating the structure-function relationships of the ∆5 fatty acid desaturase and the cyclopropane fatty acid synthase". Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/133997/1/Matthias%20Hannes_Nachtschatt_Thesis.pdf.

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Moving from a fossil fuel-based linear economy to a renewable circular economy is a key challenge facing industry, society and our natural environment. An alternative to crude oil derived petrochemicals are oleochemicals that are produced by plants or microorganisms. Matthias's research focused on exploring biochemical tools to create novel oleochemicals as renewable feedstocks for the chemical industry. Specifically, his thesis contributed to our understanding of fatty acid modification processes within biological systems. Matthias's work is a fundamental contribution to further the renewable resource revolution.

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Farrell, Emma K. "Biosynthesis of fatty acid amides". Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/1629.

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Primary fatty acid amides (PFAMs) and N-acylglycines (NAGs) are important signaling molecules in the mammalian nervous system, binding to many drug receptors and demonstrating control over sleep, locomotor activity, angiogenesis, vasodilatation, gap junction communication, and many other processes. Oleamide is the best-studied of the PFAMs, while the in vivo activity of the others is largely unstudied. Even less is known about the NAGs, as their discovery as novel compounds is much more recent due to low endogenous levels. Herein is described extraction and quantification techniques for PFAMs and NAGs in cultured cells and media using solvent extraction combined with solid phase extraction (PFAM) or thin layer chromatography (NAG), followed by gas chromatography-mass spectroscopy to isolate and quantify these lipid metabolites. The assays were used to examine the endogenous amounts of a panel of PFAMs as well as the conversion of corresponding free fatty acids (FFAs) to PFAMs over time in several cell lines. The cell lines demonstrated the ability to convert all FFAs, including a non-natural FFA, and an ethanolamine to the corresponding PFAM. Different patterns of relative amounts of endogenous and FFA-derived PFAMs were observed in the cell lines tested. Essential to identifying therapeutic targets for the many disorders associated with PFAM signaling is understanding the mechanism(s) of PFAM and NAG biosynthesis. Enzyme expression studies were conducted to determine potential metabolic enzymes in the model cell lines in an attempt to understand the mechanism(s) of PFAM biosynthesis. It was found that two of the cell lines which show distinct metabolisms of PFAMs also demonstrate unique enzyme expression patterns, and candidate enzymes proposed to perform PFAM and NAG metabolism are described. RNAi knockdown studies revealed further information about the metabolism of PFAMs and calls into question the recently proposed involvement of cytochrome c. Isotopic labeling studies showed there are two pathways for PFAM formation. A novel enzyme is likely to be involved in formation of NAGs from acyl-CoA intermediates.

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Taylor, George. "Fatty acid metabolism in cyanobacteria". Thesis, University of Exeter, 2012. http://hdl.handle.net/10871/9363.

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With crude oil demand rising and supplies being depleted, alternative energy, specifically biofuels, are of intense scientific interest. Current plant crop based biofuels suffer from several problems, most importantly the use of land needed for food. Cyanobacteria offer a solution to this problem as they do not compete with land for food and produce hydrocarbons that can be used as biofuels. Upon examination of metabolic pathways competing with hydrocarbon synthesis, it appeared that cyanobacteria lacked the major fatty acid degradative metabolic pathway β-oxidation, generally thought to be a universally occurring pathway. Lack of this pathway in cyanobacteria was confirmed by employing a range of analytical techniques. Bioinformatic analysis suggested that potential enzymes with β-oxidation activity were involved in other metabolic pathways. A sensitive assay was set up to detect acyl- CoAs, the substrates of β-oxidation, using liquid chromatography triple quadrupole mass spectrometry. None could be detected in cyanobacteria. No enzymatic activity from the rate-limiting acyl-CoA dehydrogenase/oxidase could be detected in cyanobacterial extracts. It was found that radiolabeled fatty acids fed to cyanobacteria were utilised for lipid membranes as opposed to being converted to CO2 by respiration or into other compounds by the TCA cycle. An element of the β-oxidation pathway, E. coli acyl-CoA synthetase was ectopically expressed in a strain of cyanobacteria and implications of the introduction of acyl-CoA synthesis were assessed. Finally, the regulation of the fatty acid biosynthetic pathway was investigated. It was determined that under conditions of excess fatty acid, the transcription of acetyl-CoA carboxylase and enoyl-ACP reductase was repressed and acyl-ACP synthetase involved in fatty acid recycling was induced. These results were discussed in relation to fatty acid oxidation and hydrocarbon biosynthesis in other organisms.

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Rose, Philip. "Indices of fatty acid metabolism". Thesis, Sheffield Hallam University, 1992. http://shura.shu.ac.uk/20296/.

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During the fed state energy requirements are met by glycolysis of carbohydrates. When the stores of carbohydrates are diminished, for example during prolonged fasting, metabolism switches to that of fatty acids. Fatty acids are broken down by fi-oxidation within the mitochondrial matrix. Prolonged fasting results in the production of ketone bodies. These can also be used as an energy source by the brain. In defects of fatty acid metabolism where individual steps are inhibited or blocked, such as medium chain acyl-CoA dehydrogenase deficiency, an abnormal accumulation of the metabolites that lead up to the block, or their breakdown products, is often seen. Non-compensatory levels of metabolites following the site of the defect also occur. In the fed state, when flux through the defective fatty acid pathway is minimal, metabolic profiles can appear completely normal. It is therefore often necessary to induce metabolic stress before a full laboratory investigation can proceed. Interpretation of individual metabolite quantitations can often be difficult and a variation of 'normal values' according to metabolic state can lead to misinterpretation. Comparison between the concentrations of related metabolites along the fatty acid metabolic pathway may diminish the need for exact knowledge of the metabolic state and by correlation plotting could clearly identify abnormal relationships. This thesis describes an investigation into the efficacy of paired metabolite correlation plots in preliminary detection of defects in fatty acid metabolism. In certain inborn errors of fatty acid metabolism where the fi-oxidation cycle is affected, abnormal urine metabolite patterns have been used as diagnostic markers. Similar patterns have been reported in the urine of healthy newborns and termed generalised neonatal dicarboxylic aciduria177. This report documents an investigation of the connections between generalised neonatal dicarboxylic aciduria and a number of overlying factors (vis type of feed, gender, sibling history of sudden infant death syndrome and urine carnitine levels). Also discussed is the development of two laboratory assays. A radio-enzymatic method was developed and used to determine the levels of total, free and acyl carnitine in urine or blood. Suberyl, hexanoyl, and phenylpropionyl glycine in urine can be quantitated by use of stable isotope internal standards and gas chromatography / electron impact mode mass spectrometry. Synthesis and calibration of such internal standards is described. Finally, methods used to culture and store skin fibroblasts from biopsy samples are included as an appendix. These fibroblasts can then be used in various diagnostic tests such as carbon dioxide release and electron transfer flavoprotein enzyme analysis. The costs encountered during tissue culture could be avoided by medium term storage of the biopsy material prior to culture to await sufficient clinical evidence to merit such analyses. Preliminary results of extended cryogenic storage and viability of recovered specimens are also included.

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Kishino, Shigenobu. "Production of conjugated fatty acids by lactic acid bacteria". Kyoto University, 2005. http://hdl.handle.net/2433/86244.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第11617号
農博第1473号
新制||農||905(附属図書館)
学位論文||H17||N4010(農学部図書室)
UT51-2005-D366
京都大学大学院農学研究科応用生命科学専攻
(主査)教授清水昌, 教授加藤暢夫, 教授植田充美
学位規則第4条第1項該当

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Baker, Nancy Carol. "The Associations Among Dietary Fatty Acids, Plasma Fatty Acids, and Clinical Markers in Postmenopausal Women with Diabetes". The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1253666943.

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Batugedara, Hashini Maneesha. "Fatty acid metabolism in Saccharomyces cerevisiae and effects of fatty acid metabolites on neutrophil function". Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1526893.

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In the presence of arachidonic acid (AA), Saccharomyces cerevisiae produces prostaglandin E₂ (PGE₂). S. cerevisiae and its metabolites may be consumed in products manufactured using the yeast (e.g. beer). Neutrophils are immune cells present in the gastrointestinal (GI) tract during inflammation. As a lipid-signaling molecule, PGE₂ can potentially modify neutrophil functions and exacerbate pre-existing inflammation. As neutrophil migration is a hallmark of inflammation, we investigated the impact of PGE₂ on neutrophil chemotaxis. Chemotaxis assays were performed on neutrophils isolated from human whole blood using the chemotactic agents f-Met-Leu-Phe (fMLP) or interleukin-8 (IL-8). Neutrophil chemotaxis was concentration dependent as it was enhanced 3.5-fold at low concentrations of PGE₂ (0.1 nM-10 nM) and reduced 3.0-fold at higher concentrations of PGE₂ (100 nM).

The biochemical pathway utilized by S. cerevisiae to produce PGE₂ is unknown. Identifying enzymes that metabolize AA may direct approaches to reduce the impact that yeast PGE₂ may have on neutrophils. S. cerevisiae does not have genes homologous to those involved in mammalian AA metabolism. We employed RNAseq transcriptome sequencing to study the lipid biosynthetic pathway in S. cerevisiae and observed 1248 genes upregulated in yeast that were cultured in the presence of AA relative to yeast that were cultured without AA. Notably, genes that mediate beta-oxidation of fatty acids (Pot1, Pox1, Faa1 and Faa2) were upregulated up to 2.3-fold.

The results demonstrate that low concentrations of PGE₂ enhance neutrophil chemotaxis that is mediated by fMLP or IL-8, suggesting that PGE₂ may aid in recruiting neutrophils from regions that are distant to a site of inflammation. Once a higher concentration of PGE₂ is encountered by neutrophils, neutrophils may halt their migration and engage effector functions such as phagocytosis and superoxide production. Increased expression of genes involved with fatty acid metabolism points to enzymes that may utilize AA to produce PGE₂ in S. cerevisiae. Experiments testing PGE₂ levels in knock-out strains of yeast will identify genes involved in PGE₂ production. Results of this study have implications to reduce potential off-target effects caused by yeast PGE₂ in consumables.

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Murota, Kaeko. "INHIBTION OF DIETARY FATTY ACID ABSORPTION BY EXOGENOUS FATTY ACID DERIVATIVES IN THE SMALI INTESTINE". Kyoto University, 2001. http://hdl.handle.net/2433/150341.

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Libri sul tema "Fatty acid"

Hayes, Teresa L., e Wendy F. Marley. Fatty acid markets. Cleveland, OH: Freedonia Group, Inc., 1998.

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Milligan, Graeme, e Ikuo Kimura, a cura di. Free Fatty Acid Receptors. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50693-7.

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C, Glatz Jan F., e Vusse, G. J. van der., a cura di. Cellular fatty-acid binding proteins. Dordrecht: Kluwer Academic Publishers, 1990.

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Glatz, Jan F. C., e Ger J. Van Der Vusse, a cura di. Cellular Fatty Acid-binding Proteins. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-3936-0.

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Gunstone, F. D. Fatty Acid and Lipid Chemistry. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-4131-8.

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Reubsaet, Frans A. Peroxisomal fatty acid [beta]-oxidation. Nijmegen: Univ., 1991.

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D, Gunstone F. Fatty Acid and Lipid Chemistry. Boston, MA: Springer US, 1996.

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C, Teale M., a cura di. Omega 3 fatty acid research. New York: Nova Science Publishers, 2005.

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Fatty acid and lipid chemistry. London: Blackie Academic & Professional, 1996.

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Asim, Dutta-Roy, e Sener Friedrich, a cura di. Cellular proteins and their fatty acids in health and disease. Weinheim: Wiley-VCH, 2003.

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Capitoli di libri sul tema "Fatty acid"

Gooch, Jan W. "Fatty Acid". In Encyclopedic Dictionary of Polymers, 296. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4801.

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Gooch, Jan W. "Fatty Acid". In Encyclopedic Dictionary of Polymers, 892. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13739.

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Gunstone, F. D. "Fatty Acid Structure". In The Lipid Handbook, 1–23. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-2905-1_1.

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Sauer, Leonard A. "Fatty Acid Transport". In Encyclopedia of Cancer, 1–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27841-9_2132-2.

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Schomburg, D., M. Salzmann e D. Stephan. "Fatty-acid peroxidase". In Enzyme Handbook 7, 731–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78521-4_139.

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Schomburg, Dietmar, e Dörte Stephan. "Fatty-acid synthase". In Enzyme Handbook 11, 1011–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-61030-1_217.

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Park, Margaret A., e Charles Chalfant. "Fatty Acid Metabolism". In Molecular Life Sciences, 1–17. New York, NY: Springer New York, 2020. http://dx.doi.org/10.1007/978-1-4614-6436-5_613-1.

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Gooch, Jan W. "Polymerized Fatty Acid". In Encyclopedic Dictionary of Polymers, 565. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9135.

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Sauer, Leonard A. "Fatty Acid Transport". In Encyclopedia of Cancer, 1696–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-46875-3_2132.

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Zhao, Weiling. "Fatty Acid Synthase". In Encyclopedia of Cancer, 1380–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16483-5_2131.

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Atti di convegni sul tema "Fatty acid"

KRUMINA-ZEMTURE, Gita, e Ilze BEITANE. "FATTY ACID COMPOSITION IN BUCKWHEAT (FAGOPYRUM ESCULENTUM M.) FLOURS AND THEIR EXTRUDED PRODUCTS". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.017.

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Lipids compose a small part of buckwheat seed, but they play an important role in the quality of food. The aim of this study was to evaluate the composition and content of fatty acids in different buckwheat flours (raw, roasted, white, black and germinated) and their extruded products. Fatty acids were quantified by gas chromatography according to the BIOR-T-012-131-2011 method. The prevalence of unsaturated fatty acids was determined which varied between 78.7 and 82.0 g 100 g-1 of fat in buckwheat samples. Linoleic and oleic acids were the most abundant unsaturated fatty acids, whereas palmitic acid was the main saturated fatty acid in buckwheat flours and their extruded products. Unsaturated/saturated fatty acid ratio was determined within 3.69 and 4.56, whereas linoleic/α-linolenic acid ratio was between 13.54 and 16.04. No trans-fatty acids in buckwheat flours and their extruded products were observed. The results showed that germination and extrusion of buckwheat flours did not have any effect on the content and composition of fatty acids (p>0.05).

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Kang, Jeanne, e In-Hwan Kim. "Concentration of eicosapentaenoic acid via Candida rugosa lipase-catalyzed esterification with phytosterol and fatty acid from anchovy oil". In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/wyzv8794.

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Eicosapentaenoic acid (EPA, 20:5n3), which is one of the well-known polyunsaturated fatty acids (PUFAs), is contained abundantly in anchovy oil among marine oils. EPA, along with docosapentaenoic acid (DPA, 22:5n3) and docosahexaenoic acid (DHA, 22:6n3), provide several health benefits such as reducing the risk of cardiovascular disease, cancer, and stroke, protecting vision, and increasing immunity. In the present study, EPA was concentrated efficiently in the unesterified fatty acid when Candida rugosa lipase-catalyzed esterification with phytosterol and fatty acid from anchovy oil was carried out in a solvent system. The effects of several parameters upon the concentration of EPA were investigated including the molar ratio of the substrate, temperature, and enzyme loading. The optimum conditions of molar ratio, temperature, and enzyme loading were 3:1 (phytosterol to fatty acids), 40 °C, 10 % (based on the total weight of substrate), respectively. Under the optimum conditions, EPA content in the unesterified fatty acid increased markedly from 20 % in the initial fatty acid up to 46% after the reaction time of 6 h. DPA and DHA were also concentrated in the unesterified fatty acid with a similar tendency even though the contents of both PUFAs were much lower than EPA. Consequently, the sum of EPA, DPA, and DHA content increased from 24% in the initial fatty acid up to 65% in the unesterified fatty acid, after Candida rugosa lipase-catalyzed esterification. In addition, phytosteryl ester, which has applied into fat-based food products as a functional component, was synthesized simultaneously during the concentration of EPA via enzymatic esterification.

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Bewick, Patrick, Eva Collakova e Bo Zhang. "Identification of Soybean Germplasm with Higher Concentrations of Long Chain Fatty Acids". In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/yetx4658.

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Fatty Acids are essential components of the diet and are critical for proper cell function. A balanced ratio of ω-3 to ω-6 fatty acids can be tied to positive human cardiovascular and autoimmune health. Aquaculture requires a much higher ratio. Soybean contains a substantial amount of fatty acids, but many varieties contain significantly higher concentrations of ω-6 fatty acids. The objective of this project was to identify soybean accessions with unique fatty acid profiles for genetic analysis to inform breeding decisions. Samples of 50 accessions originating from 16 countries were taken from seeds harvested in Blacksburg, VA in 2020. A gas chromatograph-flame ionization detector was used to quantify fatty acid levels and composition. Mass spectrometry was used to confirm the identity of peaks of interest. Fatty acid profiles for each sample were compared to the mean of all samples, and accessions with significantly different fatty acid concentrations were identified. These preliminary results will be used to inform future projects.

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Kato, Hisato, Shinzo Morita, Masahiro Tawata e Shuzo Hattori. "Evaporated Fatty Acid Resist Process". In 1989 Microlithography Conferences, a cura di Elsa Reichmanis. SPIE, 1989. http://dx.doi.org/10.1117/12.953035.

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Sugiyama, Takeshi, Alison J. Hobro, Takayuki Umakoshi, Prabhat Verma e Nicholas I. Smith. "Raman spectroscopy of macrophage uptake and cellular response during exposure to dietary lipids". In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2019. http://dx.doi.org/10.1364/jsap.2019.18p_e208_8.

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The increase in patients suffering from ‘lifestyle diseases such as coronary heart disease, atherosclerosis, diabetes and gout has been associated with the amount and nature of fats in our diets. In many of these diseases, macrophages and their role in lipid metabolism greatly impacts the development and severity of the disease. Fatty acids, which are a sub-class of lipids, have many different types depending on the number of carbon atoms and the presence of carbon double bonds (i.e. saturated and unsaturated fatty acids). The chemical properties of each fatty acid depend on the number of carbon atoms and degree of saturation. Therefore, it is important to investigate how macrophages metabolize these different types of fatty acids. In this research, we focus on the distribution and the uptake of four fatty acids: palmitic acid, stearic acid, oleic acid, and linoleic acid, shown in Table 1.

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Sakuradani, Eiji, Kai Yoshida, Naomi Murakawa e Takaiku Sakamoto. "Studies on filamentous fungus Fusarium sp. accumulating hydroxy fatty acids". In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/bmzp3848.

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Crude glycerol is produced as a by-product on a biodiesel production process. Effective utilization of this crude glycerol may help to reduce manufacturing costs and produce value-added products. We isolated microorganisms that grow in a medium containing crude glycerol as a major carbon source and analyzed their fatty acid composition. Fusarium sp. D2 was found to accumulate fatty acid secondary metabolites such as 10-hydroxystaric acid (HYB) and 10-oxostearic acid (KetoB). These fatty acids were converted form oleic acid containing crude glycerol as a component. We isolated a hydratase gene from strain D2 and characterized the hydratase by gene expression analysis using Escherichia coli. Strain D2 accumulates toxic fatty acids such as free fatty acids added in the medium. We aimed to use strain D2 as a host for the production of functional lipids that have been difficult to produce by fermentation. We tried to develop a host-vector system for strain D2. Here, we introduce studies on Fusarium sp. D2 accumulating hydroxy fatty acids.

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Migliori, Aubreyona, Robert E. Ward, Silvana Martini e Melissa Marsh. "Simultaneous Determination of Free and Esterified Fatty Acids of Food Fats Using a Rapid Gas Chromatographic Method". In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/ebqf1830.

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The goal of this study was to develop a rapid and sensitive method to simultaneously determine the free and esterified fatty acid content of soybean oil (SBO) in the same GC-FID run. Using base catalysis with sodium methoxide in methanol, we were able to selectively derivatize the esterified fatty acids to methyl esters and then separate and measure both the free and esterified fatty acids using a free fatty acid phase (FFAP) column. This method was compared to titration, a traditional method of determining acidity in food fats. Using base catalysis, the esterified fatty acid content of the soybean oil was found to be similar to published values. Interestingly, there were similar proportions of free palmitate, stearate, oleate, linoleate, and linolenate at trace levels in the SBO. To compare the methods, soybean oil was spiked with free linoleate from 0.04% to 5%. Using titration, the standard curves indicated that the free fatty acid content over a series of samples, measured as oleic acid, had a r2 value of 0.999. Standard curves from gas chromatography showed an r2 value of 0.998 of linoleic acid added in the sample. However, the base catalysis GC method was inaccurate below 0.5% added linoleic acid due to incomplete transesterification. Using thin layer chromatography, it was established that there were residual mono- and diglycerides in the sample. This was not the case when potassium hydroxide in methanol was used. Once the detection limit of free fatty acids is established, this method would be valuable for rapid screening of food fats for free fatty acids.

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Bozdogan Konuskan, Dilsat. "Influence of Olive Maturity on Some Physico-Chemical Properties and Fatty Acid Composition of Monovarietal Olive Oil Extracted from Halhali Cultivar". In The 9th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2022. http://dx.doi.org/10.24264/icams-2022.i.5.

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This study was carried out to determine influence of olive maturity on some physicochemical properties and fatty acid compositions of olive oils extracted from the Halhalı cultivar which harvested from Hatay in the Eastern Mediterranean region of Turkey. For this purpose, olive oils were obtained by mechanical method from olives collected from Halhalı cultivar in 3 different olive maturity of the 2021 production season. Ripening index and oil yield analysis of the olives and free fatty acids, peroxide value, fatty acid compositions were carried out in Halhalı olive oil. Free fatty acids and peroxide values of olive oils were found in the range of 0.39-0.73 (%oleic acid) and 5.14-9.43 meq O2/kg respectively. The amount of free fatty acids increased with maturity. It was determined that the oleic acid in the range of 67.59%-70.26%, palmitic acid in the range of 13.56-15.82%, linoleic acid in the range of 9.52-13.65%, stearic acid in the range of 3.34-4.13%, palmitoleic acid 0.96%-1.29%, linolenic acid 0.86-0.98% and arachidic acid 0.42-0.53. It was determined that decrease in oleic acid and palmitic acid contents and an increase in linoleic acid content with maturity. It has been determined that Halhalı monovarietal olive oil is within the limits specified in the Turkish Food Codex on Olive Oil and Pirina Olive Oil in terms of the examined properties.

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Hidayat, Arif, e Bachrun Sutrisno. "Esterification free fatty acid in palm fatty acid distillate using sulfonated rice husk ash catalyst". In INTERNATIONAL SYMPOSIUM ON APPLIED CHEMISTRY (ISAC) 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4973173.

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Mirghani, Mohamed, Adeeb Hayyan, Hanee Hizaddin, Mahar Diana Hamid, Jehad Saleh, M. Y. Zulkifli, Waleed Al Abdulmonem, Fahad Alhumaydhi e Abdullah Aljohani. "Novel Encapsulated Ionic Liquid Analogous for Free Fatty Acid Conversion to Fatty Acid Methyl Ester". In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/vapq5899.

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The development of an efficient and green catalyst can be considered as a major contribution for the esterification of free fatty acid (FFA) in non-edible oil feedstocks. The DES was encapsulated in medical capsules for esterification of free fatty acid. The DES was synthesized from allyltriphenylphosphonium bromide (Allyl) and p-toluenesulfonic acid (PTSA). The FFA content was reduced to < 2 % under optimum conditions (catalyst dosage 2% (wt/wt) catalyst to oil, 10:1 molar ratio of oil to methanol at 60 °C for 60 min reaction time). The formation of a eutectic mixture endows the catalyst with advantages for esterification reaction such as improvements in recyclability and hygroscopicity of PTSA.

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Rapporti di organizzazioni sul tema "Fatty acid"

Jensen, James, e Kevin Van Dee. Altered Fatty Acid Soybeans. Ames: Iowa State University, Digital Repository, 2006. http://dx.doi.org/10.31274/farmprogressreports-180814-273.

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Fillmore, Natasha, Osama Abo Alrob e Gary D. Lopaschuk. Fatty Acid beta-Oxidation. AOCS, luglio 2011. http://dx.doi.org/10.21748/lipidlibrary.39187.

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Hofstad, Beth. Engineering Fatty Acid Synthesis in Rhodosporidium Toruloides to Produce Mid-Chain Fatty Acids and Fatty Alcohols - CRADA 501. Office of Scientific and Technical Information (OSTI), febbraio 2021. http://dx.doi.org/10.2172/1827799.

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Risk Assessment, FSA Regulated Products. Safety Assessment: Outcome of assessment of Cetylated Fatty Acids as a Novel Food. Food Standards Agency, agosto 2023. http://dx.doi.org/10.46756/sci.fsa.loq953.

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An application was submitted to the Food Standards Agency (FSA) and Food Standards Scotland (FSS) in February 2021 from Pharmaneutra S.p.a., Italy (“the applicant”) for the authorisation of cetylated fatty acids as a novel food. The novel food is a mixture of cetylated fatty acids, cetyl myristate and cetyl oleate, which are synthesised from cetyl alcohol with myristic acid and, cetyl alcohol with oleic acid, respectively. These two cetylated fatty acids are then blended with olive oil to give a finished product containing 70 – 80% cetylated fatty acids. The application is a new application, seeking to use cetylated fatty acids within the food category: food supplements. To support the FSA and FSS in their evaluation of the application, the Advisory Committee on Novel Foods and Processes (ACNFP) were asked to review the safety dossier and supplementary information provided by the applicant. The Committee concluded that the applicant had provided sufficient information to assure the novel food, cetylated fatty acids, was safe under the proposed conditions of use. The anticipated intake levels and the proposed use in foods and food supplements was not considered to be nutritionally disadvantageous and does not mislead consumers. The views of the ACNFP have been taken into account in this safety assessment which represents the opinion of the FSA and FSS on cetylated fatty acids.

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Paul, Shilpi. Characterization of Enzymes Involved in Fatty Acid Elongation. Fort Belvoir, VA: Defense Technical Information Center, marzo 2007. http://dx.doi.org/10.21236/ad1014036.

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Kridel, Steven J. Inhibitors of Fatty Acid Synthase for Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, maggio 2012. http://dx.doi.org/10.21236/ada570535.

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Kridel, Steven J., Jeffrey W. Schmitt e W. T. Lowther. Inhibitors of Fatty Acid Synthase for Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, maggio 2011. http://dx.doi.org/10.21236/ada545695.

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Furuta, Eiji, e Kounosuke Watabe. Targeting Fatty Acid Synthase Gene for Prostate Cancer Therapy. Fort Belvoir, VA: Defense Technical Information Center, ottobre 2008. http://dx.doi.org/10.21236/ada494439.

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Benner, Bruce A. Jr, e Jacolin A. Murray. NIST Fatty Acid Quality Assurance Program 2017 final report. Gaithersburg, MD: National Institute of Standards and Technology, ottobre 2019. http://dx.doi.org/10.6028/nist.ir.8273.

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Tait, Richard G., Shu Zhang, Travis Knight, Jenny Minick Bormann, Daryl R. Strohbehn, Donald C. Beitz e James M. Reecy. Heritability Estimates for Fatty Acid Concentration in Angus Beef. Ames (Iowa): Iowa State University, gennaio 2007. http://dx.doi.org/10.31274/ans_air-180814-524.

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