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采用毛细管气相色谱法,对撒金柏籽油中脂肪酸成分进行了分析,鉴定出11种脂肪酸,主要成分为十八碳不饱和脂肪酸的油酸、亚油酸、γ-亚麻酸,其含量高达89.79%上,其中人体必需脂肪酸含量为71.32%。 相似文献
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本文采用毛细管气相色谱法,测定了采自青海境内菊科三种野生植物籽油中脂肪酸组成及相对含量。结果表明,所测植物籽油中,主要为棕榈酸、硬脂酸、油酸、亚油酸。 相似文献
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本文采用毛细管气相色谱法,测定了采自青海境内蔷薇科三种野生植物籽油中脂肪酸组成及相对含量。结果表明,所测植物籽油中,主要为棕榈酸、硬脂酸、油酸、亚油酸和亚麻酸。油的脂肪酸组成较好,有较高的医疗保健价值,具有开发利用价值。 相似文献
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借助气相色谱及气相色谱／质谱联用方法对桦叶四蕊Ｑｉ籽油中的脂肪酸进行了研究。结果表明：籽油中不饱和脂肪酸含量为８１．５４％,其中亚油酸、γ－亚麻酸和α－亚麻酸等人体必需脂肪酸含量分别为３８．４６％、４．１１％和２．２５％。 相似文献
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紫苏籽油理化特性及脂肪酸组成的研究 总被引：6，自引：0，他引：6
本文对紫苏籽油的理化特性及其脂肪酸组成进行了研究,结果表明,紫苏籽油主要含不饱和脂肪酸。其中棕榈酸6.7%、硬脂酸2.0%、油酸12.4%、亚油酸15.0%、亚麻酸62.5%,不饱和脂肪酸含量高达98.0%以上。脂肪酸组成较好,说明其有较高的医疗保健价值。 相似文献
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豆科七种野生植物籽油脂肪酸研究 总被引：1，自引：0，他引：1
采用毛细管气相色谱法,对青海境内的豆科七个属的七种野生植物种子的含油率,理化常数和脂肪酸组成及相对含量进行了测定,结查表明,所测植物籽油中,主要为棕榈酸,硬脂酸,油酸,亚油酸和亚麻酸。 相似文献
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BackgroundCultivated peanut (Arachis hypogaea L.) is a major oilseed crop worldwide. Fatty acid composition of peanut oil may affect the flavor and shelf life of the resulting food products. Oleic acid and linoleic acid are the major fatty acids of peanut oil. The conversion from oleic acid to linoleic acid is controlled by the Δ12 fatty acid desaturase (FAD) encoded by AhFAD2A and AhFAD2B, two homoeologous genes from A and B subgenomes, respectively. One nucleotide substitution (G:C → A:T) of AhFAD2A and an “A” insertion of AhFAD2B resulted in high-oleic acid phenotype. Detection of AhFAD2 mutation had been achieved by cleaved amplified polymorphic sequence (CAPS), real-time polymerase chain reaction (qRT-PCR) and allele-specific PCR (AS-PCR). However, a low cost, high throughput and high specific method is still required to detect AhFAD2 genotype of large number of seeds. Kompetitive allele specific PCR (KASP) can detect both alleles in a single reaction. The aim of this work is to develop KASP for detection AhFAD2 genotype of large number of breeding materials.ResultsHere, we developed a KASP method to detect the genotypes of progenies between high oleic acid peanut and common peanut. Validation was carried out by CAPS analysis. The results from KASP assay and CAPS analysis were consistent. The genotype of 18 out of 179 BC4F2 seeds was aabb.ConclusionsDue to high accuracy, time saving, high throughput feature and low cost, KASP is more suitable for determining AhFAD2 genotype than other methods. 相似文献
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T. J. Netticadan T. F. Ashavaid K. G. Nair 《Indian journal of clinical biochemistry : IJCB》1997,12(1):49-54
The cardiac sarcolemma was characterized in 13 normal and 11 ischemic dog hearts by enzyme analysis and compositional assays. Significant decreases in the activities of the sodium-potassium and calcium pumps and structural compositional disturbances were observed in ischemia. High concentrations of oleic acid, a fatty acid and palmitoyl carnitine, a fatty acid intermediate caused inhibition of the enzyme pump activities of the normal sarcolemma. Thus, ischemia results in the functional impairment of the sarcolemma. Accumulation of fatty acid and fatty acid intermediates, occurring in myocardial ischemia, could be an underlying mechanism. 相似文献
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Karen M. D'Souza Tester E. Ashavaid 《Indian journal of clinical biochemistry : IJCB》2007,22(2):84-89
The sarcoplasmic reticulum was isolated and characterized in the pure form from normal caprine (Capra hircus) hearts. Under ischemic condition, fatty acids like palmitic acid, palmitoyl carnitine and oleic acid accumulatein vivo. These are known to have a detrimental effect on membrane components. The effects of simulated ischemia on the Ca2+-ATPase were studied using these fatty acidsin vitro at concentrations at which they occurin vivo in the ischemic heart. All three fatty acids inhibited Ca2+-ATPase activity. At lower concentrations, palmitoyl carnitine was the most potent, followed by oleic acid while palmitic
acid displayed the least potency. Electron microscopy studies with fatty acids showed morphological disruptions in SR vesicles.
The decline in Ca2+-ATPase activity could be attributed to the change in membrane morphology. 相似文献
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每一个单一油品虽然各具特点,但都不能达到均衡营养。该方法制取的调和油既突出各类不饱和脂肪酸比例组成的合理性,即油酸：亚油酸：亚麻酸=5：4：1,又突出产品的营养功能,即其中含有较高的维生素E。该比例组成满足了中国营养学会推荐的单不饱和脂肪酸与多不饱和脂肪酸比例相等的要求,又满足了ω-6多不饱和脂肪酸：ω-3多不饱和脂肪酸=4：1的要求。因此是最理想的调和油。 相似文献
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BackgroundRhodotorula glutinis is capable of synthesizing numerous valuable metabolites with extensive potential industrial usage. This paper reports the effect of initial culture medium pH on growth and protein, lipid, and carotenoid biosynthesis by R. glutinis.ResultsThe highest biomass yield was obtained in media with pH 4.0–7.0, and the value after 72 h was 17.2–19.4 gd.w./L. An initial pH of the medium in the range of 4.0–7.0 has no significant effect on the protein (38.5–41.3 g/100 gd.w.), lipid (10.2–12.7 g/100 gd.w.), or carotenoid (191.7–202.9 μg/gd.w.) content in the biomass or on the profile of synthesized fatty acids and carotenoids. The whole pool of fatty acids was dominated by oleic (48.1–53.4%), linoleic (21.4–25.1%), and palmitic acids (13.0–15.8%). In these conditions, the yeast mainly synthesized torulene (43.5–47.7%) and β-carotene (34.7–38.6%), whereas the contribution of torularhodin was only 12.1–16.8%. Cultivation in medium with initial pH 3.0 resulted in a reduction in growth (13.0 gd.w./L) and total carotenoid (115.8 μg/gd.w.), linoleic acid (11.5%), and torularhodin (4.5%) biosynthesis.ConclusionThe different values of initial pH of the culture medium with glycerol and deproteinized potato wastewater had a significant effect on the growth and protein, lipid, and carotenoid biosynthesis by R. glutinis. 相似文献
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家蚕雌蛾体中微量元素和脂肪酸的分析 总被引：1，自引：0，他引：1
分析了家蚕雌蛾体中微量元素和脂肪酸的含量,并对其质量进行了评价.家蚕雌蛾体富含微量元素,检测的10种常见微量元素的加和量和人体必需宏量元素含量分别为27339.30 mg/kg和26900.00 mg/kg,其中人体需要量较大的4种微量元素(锌、铁、铜和锰)含量高于重要中药资源昆虫芫菁科昆虫蛾体中的含量.并且适合于人体日需要量.家蚕雌蛾体含有丰富的不饱和脂肪酸,其中必需的n-3系列多不饱和脂肪酸亚麻酸含量最高(39.88%),是鸡蛋的40倍和牛奶的38倍,并高于亚油酸含量6.5倍.研究结果显示,家蚕雌蛾是开发保健食品和医药品的优质原料. 相似文献
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22 kinds of seed oils were extracted from 8 genera of the family Ulmaceae in China
The seed oils were examined for their characteristics and fatty acid compositions by
gas liquid chromatography. The fatty acid compositions of these oils were found to
fall into two classes. Some genera (such as Ulmus, Zelkova) contain mainly
lower saturated acids, in which the chief acid is capric acid 10:0, while the genera
(such as Celtis, Pteroceltis, Aphananthe, Trema, Gironniera) contain mainly unsaturat-
ed acids, in which the chief acid is linoleic acid 18:2. Hemiptelea davidii (Hance)
Planch contain however either certain amount of short-chain saturated acids or higher
unsaturated acids, it appears a intermediate genus between the two classes. According
to the component acids we support that the Ulmaceae be split into two subfamilies.
The genera arrangement based on the component acids corresponds basically with the
view based on mophological characters and flavonoids found in leaves of Ulmaceae, but
there are some discrepancies in certain genera, for example, the Aphananthe should beplaced in Celtoid instead of Ulmoid by the present study. 相似文献
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BackgroundOleaginous yeasts can be grown on different carbon sources, including lignocellulosic hydrolysate containing a mixture of glucose and xylose. However, not all yeast strains can utilize both the sugars for lipogenesis. Therefore, in this study, efforts were made to isolate dual sugar-utilizing oleaginous yeasts from different sources.ResultsA total of eleven isolates were obtained, which were screened for their ability to utilize various carbohydrates for lipogenesis. One promising yeast isolate Trichosporon mycotoxinivorans S2 was selected based on its capability to use a mixture of glucose and xylose and produce 44.86 ± 4.03% lipids, as well as its tolerance to fermentation inhibitors. In order to identify an inexpensive source of sugars, nondetoxified paddy straw hydrolysate (saccharified with cellulase), supplemented with 0.05% yeast extract, 0.18% peptone, and 0.04% MgSO4 was used for growth of the yeast, resulting in a yield of 5.17 g L−1 lipids with conversion productivity of 0.06 g L−1 h−1. Optimization of the levels of yeast extract, peptone, and MgSO4 for maximizing lipid production using Box–Behnken design led to an increase in lipid yield by 41.59%. FAME analysis of single cell oil revealed oleic acid (30.84%), palmitic acid (18.28%), and stearic acid (17.64%) as the major fatty acids.ConclusionThe fatty acid profile illustrates the potential of T. mycotoxinivorans S2 to produce single cell oil as a feedstock for biodiesel. Therefore, the present study also indicated the potential of selected yeast to develop a zero-waste process for the complete valorization of paddy straw hydrolysate without detoxification.How to cite: Sagia S, Sharma A, Singh S, et al. Single cell oil production by a novel yeast Trichosporon mycotoxinivorans for complete and ecofriendly valorization of paddy straw. Electronic Journal of Biotechnology 2020;44. https://doi.org/10.1016/j.ejbt.2020.01.009. 相似文献
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A. Bhise P. V. Krishnan R. Aggarwal M. Gaiha J. Bhattacharjee 《Indian journal of clinical biochemistry : IJCB》2005,20(2):4-9
The present study comprised 100 patients of essential hypertension who were screened for fasting hyperinsulinemia, which was
detected in 77% cases. Twenty such hyperinsulinemic cases were subjected to 4 weeks of dietary control phase followed by 6
weeks of omega-3 fatty acids substitution [either 0.6 g/d (group 1) or 1.2 g/d (group 2)]. The mean basal fasting plasma insulin
levels were significantly higher (p<0.001) in patients of hypertension when compared to normal controls (126.51±80.36 and
19.35±12.61 μU/ml respectively). At the end of 4 weeks of diet control only, no significant change was observed in any parameter.
After substitution of omega-3 fatty acid, a significant reduction of fasting plasma insulin levels in both group 1 (29%) and
group 2 (22.8%) was observed (p<0.001). Significant reduction of systolic and diastolic blood pressure (16.4% and 25% respectively),
serum cholesterol, triglycerides and low density lipoprotein was also noted in both groups (p<0.001), while high density lipoprotein
increased by ∼8 mg% in both groups. Thus omega-3 fatty acid substituion in low dose along-with curtailment of dietary omega-6
fatty acid may be used as an adjunctive measure in the management of essential hypertension. 相似文献