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Free primary alcohols in oils and waxes from germs,kernels and other components of nuts,seeds, fruits and cereals 总被引:2,自引:0,他引:2
Kazuko Kawanishi Kumlko Aoki Yohei Hashimoto Akira Matsunobu 《Journal of the American Oil Chemists' Society》1991,68(11):869-872
The composition of free primary alcohols in oils and waxes obtained from the germ, kernel, seed coat, shell and skin (peel)
of various nuts, seeds, fruits and cereals and from the chrysalis of silkworm was examined. These alcohols are usually present
in small amounts, along with large quantities of hydrocarbons, esters and glycerides in oils and waxes. Thus, it is necessary
to remove hydrocarbons, esters and glycerides to analyze the alcohols. We found that preparative reverse-phase thin-layer
chromatography (TLC) was the best way to isolate alcohols from oils and waxes. Gas liquid chromatography (GLC) then detected
hexacosanol, octacosanol and triacontanol in the oils and waxes. Octacosanol usually was the predominant alcohol. Relationships
between the organs from nuts, seeds, fruits and cereals and the contents of octacosanol are suggested. For example, degermed
kernels contained two times more octacosanol than the germ, and the skin coat and shell contained one-half and one-fortieth
the octacosanol of the germ, respectively. 相似文献
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二十八烷醇作为一种具有抗疲劳活性的功能性物质,是一种天然存在的长链饱和一元脂肪醇。针对二十八烷醇熔点高及水溶性差的特点,开发了一种水分散型乳化液,并对不同乳化剂、稳定剂及乳化工艺对二十八烷醇乳化液稳定性的影响进行了研究,确定了二十八烷醇乳化液的最佳配方及工艺,并将其添加到运动饮料配方中,研制出一种均匀稳定的抗疲劳功能性运动饮料。 相似文献
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含二十八烷醇油胶囊缓解体力疲劳、降血脂功能研究 总被引:2,自引:0,他引:2
油胶囊的主要成分为二十八烷醇、VE和亚油酸。辅助降低血脂动物试验结果表明:40只SD雄性大鼠经口灌胃连续30天给予后,受试物三个剂量组(83.3、250、500mg/kg.bw)血清胆固醇(TC)含量显著低于高脂对照组(P<0.05);高、中剂量组甘油三脂(TG)含量显著低于高脂对照组(P<0.05);受试物三个剂量组(167、333、500 mg/kg.bw)对160只雄性昆明小鼠缓解体力疲劳试验结果,能显著延长小鼠负重游泳时间和升高肝糖原含量,能显著降低运动后的血清尿素含量,对小鼠运动后血清乳酸变化幅度值无明显影响。对118名符合标准自愿者人体试食检验结果表明:试食组试验后平均血清总胆固醇含量显著低于试验前,且显著低于对照组,血清总胆固醇降低有效率显著高于对照组;平均血清甘油三脂含量显著降低,且降低效率显著高于对照组,试食组试验后血清高密度脂蛋白胆固醇含量与对照组比较无显著差异。 相似文献
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二十八烷醇微乳液是由二十八烷醇、吐温80、乙醇等配制而成的均一透明液体。通过急性毒性经口试验和28 d经口重复毒性试验,判断二十八烷醇微乳液的食品毒性。在急性毒理学试验中,对昆明小鼠一次性经口灌胃10 g/kg bw二十八烷醇微乳液,观察14 d,无中毒或死亡症状,LD50>10 g/kg bw,属于实际无毒级别。在28 d经口重复毒性试验中,设置二十八烷醇高剂量组(5.00 g/kg bw)、中剂量组(2.50 g/kg bw)、低剂量组(1.25 g/kg bw)和阴性对照组,通过临床观察、对比体质量和摄食量变化、进行血液学、血生化及病理学检查得出结论,二十八烷醇微乳液对小鼠最大无作用剂量为2.50 g/kg bw(人体推荐摄入量的100倍)。综上所述,二十八烷醇微乳液无毒。 相似文献
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Tae‐Yeoul Ha Soon‐Nam Ko Sun‐Mi Lee Hak‐Ryul Kim Soo‐Hyun Chung Sung‐Ran Kim Hye‐Hyun Yoon In‐Hwan Kim 《European Journal of Lipid Science and Technology》2006,108(3):175-181
The concentrations of several nutraceutical lipid components [tocol (i.e. tocopherol + tocotrienol) phytosterol, γ‐oryzanol, octacosanol, and squalene] in milled rice and brown rice were determined. The lipid content decreased significantly (p <0.05) as the degree of milling increased, as did the total tocol content. Significant differences (p <0.05) were observed in the relative percentages of α‐tocopherol, α‐tocotrienol, and γ‐tocotrienol in brown rice and milled rice. β‐Sitosterol was the most abundant sterol, representing 50–56% of the total sterol content of all samples analyzed. There were no significant differences in the relative percentages of the sterol isomers as the degree of milling increased. The concentrations of γ‐oryzanol, squalene, and octacosanol in rice decreased significantly (p <0.05) as the degree of milling increased. 相似文献
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以苦荞麦为原料,经烘烤、浸提、过滤、调配后,加入乳化的二十八烷醇,杀菌、灌装,制成一种风味独特、营养丰富、抗疲劳的保健饮料;并对荞麦茶浸提工艺中用水量、浸提温度、浸提时间和配方及关键控制点进行了初步探讨。 相似文献