Xem 1-20 trên 27 kết quả Triacylglycerol
  • Latex from Caricaceae has been known since 1925 to contain strong lipase activity. However, attempts to purify and identify the enzyme were not suc-cessful, mainly because of the lack of solubility of the enzyme. Here, we describe the characterization of lipase activity of the latex ofVasconcel-lea heilbornii and the identification of a putative homologous lipase from Carica papaya.

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  • The aim of the present study was to investigate in detail the molecular mecha-nisms by which free fatty acids induce liver toxicity in liver cells. HepG2 and Huh7 human liver cell lines were exposed to varying concentrations of stea-rate (18:0), oleate (18:1), or mixtures of the two fatty acids, and the effects on cell proliferation, lipid droplet accumulation and induction of endoplasmic reticulum stress and apoptosis were evaluated.

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  • Triacylglycerol metabolism inSaccharomyces cerevisiae was analyzed quan-titatively using a systems biological approach. Cellular growth, glucose uptake and ethanol secretion were measured as a function of time and used as input for a dynamic flux-balance model.

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  • This review provides a brief summary of the current knowledge on oleaginous algae and their fatty acid and TAG biosynthesis, algal model systems and genomic approaches to a better understanding of TAG production, and a historical perspective and path forward for microalgae-based biofuel research and commercialization.

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Daytime food restriction alters liver glycogen, triacylglycerols, and cell size. A histochemical, morphometric, and ultrastructural study...

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  • Triacylglycerols secreted by liver and carried by very low density lipoprotein (VLDL) are hydrolysed in circulation by lipoprotein and hepatic lipases. These enzymes have been shown to have positional and fatty acid specificityin vitro.If there were specificity in basal lipolysisin vivo, triacylglycerol compositionsofcirculatingandnewlysecretedVLDLwould be different. To study this we compared the composition of normal fasting VLDL triacylglycerol of Wistar rats to that obtained after blocking lipolysis by Triton WR1339, which increasedplasmaVLDL triacylglycerol concentrationabout 4.

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  • Nội dung: Vai trò của lipid, Sự tiêu hóa và hấp thụ lipid, Sự oxy hóa triacylglycerol, Sự tổng hợp lipid trong mô bào động vật, Sự biến dưỡng các acid béo không no thiết yếu, Sự biến dưỡng ở mô mỡ, Vai trò của mô mỡ nâu trong sinh nhiệt, Biến dưỡng của lipoprotein huyết tương, Rối loạn biến dưỡng chất béo.

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  • Lipid là hợp phần quan trọng của khẩu phần ăn, được trình bày ở Hình 4.1. (a) Triacylglycerols (b) Phosphatidyl choline Hình 4.1 Cấu trúc của các lipid của cơ thể và vài loại thực phẩm quan trọng (a) Triacylglycerols (hay triglycerides) là chất béo dự trữ chủ yếu. (b) Phosphoglycerides: là nhóm được phân loại chung cho các lipid có chứa phosphor, hay được gọi là phospholipid.

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  • Những hợp chất lạ có trong loài cây bụi Euonymus alatus, còn gọi là "cây bụi phát sáng", có thể tạo ra những bước tiến mới trong nhiên liệu sinh học và các loại dầu thực phẩm ít calorie. Kết quả của một nghiên cứu mới đây tại ĐH Michigan (MSU) cho biết nhũ trắng bên trong hạt Euonymus alatus tạo ra các triacylglycerols acetyl (acTAGs), loại dầu có giá trị cao, trong khi lớp vỏ mô màu cam xung quanh hạt tạo ra dầu thực vật bình thường. ...

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  • Lipase (triacylglycerol acylhydrolases, EC xúc tác phản ứng thủy phân triglyceride ở giao diện cơ chất và nước [1] và được ứng dụng rộng rãi trong nhiều lĩnh vực công nghiệp như bột giặt, sữa, chuẩn đoán bệnh, chế biến dầu, chuyển hóa sinh học, và đồng phân nhờ một số đặc tính như đặc hiệu cơ chất, vị trí, chọn lọc đồng phân, bền nhiệt và kiềm [2].

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  • Fatty acids are an important energy source, for they yield over twice as much energy as an equal mass of carbohydrate or protein. In humans, the primary dietary source of fatty acids is triacylglycerols. This lecture will describe the metabolism of fatty acids. The two main components of fatty acid metabolism are β oxidation and fatty acid synthesis. Upon completion of this lecture, you will understand that the fatty-acid breakdown reactions of β oxidation result in the formation of reduced cofactors and acetyl-CoA molecules, which can be further catabolized to release free energy.

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  • Lipases (triacylglycerol acylhydrolases, E.C. are ubiquitous enzymes of consid- erable physiological significance and industrial potential. Lipases catalyze the hydrolysis of triacylglycerols to glycerol and free fatty acids. In contrast to esterases, lipases are activated only when adsorbed to an oil–water interface (Martinelle et al., 1995) and do not hydrolyze dissolved substrates in the bulk fluid. A true lipase will split emulsified esters of glycerine and long-chain fatty acids such as triolein and tripalmitin. Lipases are serine hydrolases.

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  • Using the broadest possible definition, a lipid (Greek lipos = fat ) may be defined as a compound of low or intermediate molecular weight (5000), a substantial proportion of which is made up of hydrocarbons. Included are diverse compounds such as fatty acids; soaps; detergents; steroids; mono-, di-, and triacylglycerols; and more complex compounds such as phospholipids, sphingolipids, glycolipids, and lipopolysaccharides.

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  • The direction of science is often driven by methodological progress, and the topic of this book is no exception. I remember sitting with a visitor on the terrace of a hotel overlooking Lake Constance in the early 1970s. We were discussing the gravimetric method of measuring total lipids in zooplankton. A few years later, as a visitor in Clyde E. Goulden’s lab, I was greatly impressed by the ability of an instrument called an Iatroscan to discriminate and quantify specific lipid classes (e.g., triacylglycerols, polar lipids, wax esters).

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  • Hormone-sensitive lipase (EC; HSL) is a key enzyme in the mobili-zation of fatty acids from stored triacylglycerols. HSL activity is controlled by phosphorylation of at least four serines. In rat HSL, Ser563, Ser659 and Ser660 are phosphorylated by protein kinase A (PKA)in vitro as well asin vivo, and Ser660 and Ser659 have been shown to be the activity-controlling sites in vitro.

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  • We applied metabolic control analysis to the Kennedy pathway for triacyl-glycerol formation in tissue cultures from the important oil crops, olive (Olea europaeaL.) and oil palm (Elaeis guineensisJacq.). When microsomal fractions were incubated at 30 C rather than 20C, there was an increase in triacylglycerol labelling.

    pdf7p dell39 27-03-2013 15 3   Download

  • Glycerol monostearat 40 - 55 là hỗn hợp các monoacylglycerol, chủ yếu là monostearoylglycerol, cùng với di và triacylglycerol với hàm lượng khác nhau.

    pdf6p truongthiuyen18 20-07-2011 28 2   Download

  • The influence of the fatty acid composition of chylomicron remnant-like particles (CRLPs) on their uptake and induction of lipid accumulation in macrophages was studied. CRLPs containing triacylglycerol enriched in saturated, monounsaturated, n)6or n)3 polyunsaturated fatty acids derived from palm, olive, corn or fish oil, respectively, and macrophages derived from the human monocyte cell line THP-1 were used.

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  • During a search for cDNAs encoding plant sterol acyl-transferases, we isolated four full-length cDNAs fromAra-bidopsis thaliana that encode proteins with substantial identity with animal lecithin : cholesterol acyltransferases (LCATs). The expressionof one of these cDNAs,AtLCAT3 (At3g03310), invarious yeast strains resulted in the doubling of the triacylglycerol content.

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  • In this chapter you will: Know the properties of the different classes of lipoproteins (chylomicrons, VLDL, LDL, IDL, and HDL); know what types of lipids are carried by each; know which class of lipoproteins are derived from which class of lipoproteins; know how triacylglycerol is absorbed and mobilized from the diet.

    ppt13p tangtuy02 08-03-2016 14 2   Download


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