共查询到20条相似文献,搜索用时 140 毫秒
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在光催化下对经甲醇醇解改性的菜油进行空气常温氧化,然后对氧化产物进行亚硫酸化。试验最佳的工艺技术参数为:氧化反应过程中,助剂R1的用量为油脂质量的1.5%,光波为长波(365nm),常温氧化反应4~6h;亚硫酸化反应温度70~75℃,亚硫酸钠用量10%~12%,时间2~3h。应用试验表明,该方法制备的氧化亚硫酸化菜油具有良好的加脂性能。 相似文献
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在我们的第一次报道中,曾对以前了解得不多的在专利中所介绍的方法,即氧化亚硫酸化不饱和油的最好操作条件进行了探索。在鳕鱼油的氧化亚硫酸化中,最好的结果是在温度为75~80℃和组分比例为鱼油: 相似文献
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Martin Loula Antonín Kaňa Magda Vosmanská Richard Koplík 《Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment》2016,33(4):668-673
Rape and other Brassicaceae family plants can accumulate appreciable amounts of thallium from the soil. Because some species of this family are common crops utilised as food for direct consumption or raw materials for food production, thallium can enter the food chain. A useful method for thallium determination is inductively coupled plasma mass spectrometry. The limit of detection (0.2 pg ml–1 Tl or 0.02 ng g–1 Tl, taking in the account dilution during sample decomposition) found in the current study was very low, and the method can be used for ultra-trace analysis. Possible transfer of thallium from rape seed to the rape oil was investigated in two ways. The balance of thallium in rape seed meal (content 140–200 ng g–1 Tl) and defatted rape seed meal indicated that thallium did not pass into the oil (p < 0.05). Moreover, the analyses of thallium in six kinds of edible rape seed oil and three kinds of margarines showed that the amount of thallium in rape seed oil is negligible. 相似文献
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肉桂挥发油提取工艺研究 总被引:2,自引:0,他引:2
本文对肉桂挥发油的提取工艺进行了优化研究,以肉桂粉为原料,采用水蒸气蒸馏的方法,在单因素试验结果与分析的基础上,以挥发油体积为指标,以水料比(A)、浸泡时间(B)、蒸馏时间(C)为因素进行正交试验,研究确定了提取肉桂挥发油的最佳工艺。试验结果表明,各因素影响挥发油提取的程度由大到小依次为水料比、蒸馏时间、浸泡时间;提取的最佳工艺参数为水料比12倍、浸泡时间2h、蒸馏时间3h。通过验证试验表明,所选的最佳提取工艺稳定、合理、可行。 相似文献
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Biochemical and toxicological studies on the effect of high and low erucic acid rapeseed oil on rats
Rats were fed on diets containing rapeseed oil, either containing low or high erucic acid content as well as the hydrogenated ones for 6 weeks. Body weight gain, biochemical and pathological parameters were investigated. The data showed high body weight gain for rats fed diets containing low erucic rape oil (LERo) compared with those fed either the high erucic rape oil (HERo), the hydrogenated or the partially hydrogenated oil diets. All rats showed non significant changes for total lipids, total cholesterol, GPT and GOT, except the partially hydrogenated rape oil diet which showed significant decrease for total cholesterol. Alkaline phosphatase however showed a significant decrease, while plasma phospholipids showed significant increase in rats fed on the hydrogenated oil diet. Triglycerides indicated non significant increase except in the group that received low erucic rape oil diet. Histopathological study showed changes in all tissues examined (liver and kidney). 相似文献
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双低菜籽营养保健油的生产及开发 总被引:1,自引:0,他引:1
目前我国双低油菜种植面积和产量已超过全部油菜籽的一半以上,由于双低菜籽油富含不饱和脂肪酸,具有优越的营养和保健功能,故被列为一种天然的营养食品。介绍了双低油菜籽的脂肪酸组成及营养保健功能,双低菜籽油的冷榨和热榨两种制备工艺,提出了冷榨天然双低菜籽油和双低菜籽营养保健油的开发途径。 相似文献
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白檀油的理化性质及其制备生物柴油的研究 总被引:2,自引:2,他引:2
研究了白檀油的理化性质和以该油制备生物柴油的工艺。结果表明:白檀出油率为20.0%;白檀油是以含棕榈酸、硬脂酸、油酸、亚油酸和亚麻酸为主的油脂,其中不饱和脂肪酸质量分数高达76.74%以上;白檀油脂理化性质、脂肪酸组成及质量分数符合生物柴油要求;应用L9(34)正交试验得出白檀油酯交换反应的最佳条件为:油醇物质的量比1∶6、催化剂用量为油质量的1.2%、反应时间2 h、反应温度60℃,转化率为92.0%。对生物柴油性能检测表明,它与0#柴油的主要性能相接近,是一种理想的0#柴油的替代品。 相似文献
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