Study on the Extracting Technology of Natural Lycopene

Optimum technical parameters for extracting lycopene from tomatoes are studied with orthogonal experiments.The results show that chloroform has the best effect compared to 4 other groups of solvents:petroleum ether,acetic add + ethanol,acetic ether,and acetone + diethyl ether,associated with the parameters of 40℃,pH 5 and the ratio of tomato paste to solvent 1:1.

几种锂基润滑脂的辐照耐受性

使用γ射线对6种锂基润滑脂进行辐照,6种润滑脂的颜色都发生了变化,且其变化程度随吸收剂量的增加呈正相关关系。复合锂基润滑脂经吸收剂量为8.1×103 kGy辐照后,稠化剂软化降解并提前进入硬化交联阶段,平均剪切应力上升169%;其基础油与受相同剂量处理的简单锂基润滑脂相比生成了额外的氧化产物。简单锂基润滑脂在接受8.1×103 kGy剂量辐照后稠化剂软化,稠度下降,但平均剪切应力下降,其劣化程度轻于复合锂基润滑脂。简单锂基润滑脂可能更适合辐照加工的工作环境。