| 1. | Table 2 . effect of phospholipids on the balance between free cholesterol and cholesteryl ester ( s ， n = 6 )
表2 .磷脂对细胞内游离胆固醇/胆固醇酯平衡的影响 |
| 2. | Association between insulin resistance and cholesteryl ester transfer protein gene polymorphism in type 2 diabetes mellitus
2型糖尿病胰岛素抵抗和胆固醇酯转运蛋白基因多态性的关联研究 |
| 3. | There are usually some disadvantages such as more toxicity and low yield in the acetylating reaction which was used to synthesize cholesteryl ester liquid crystals
合成胆甾醇酯常用的酰氯化法存在毒性大，产率低的缺陷。 |
| 4. | Among general thermochromatic liquid crystals , cholesteryl ester liquid crystals have been used in showing color and displaying temperature due to their easy obtaining , low price and reversible fresh color change
在热色液晶中，胆甾型液晶因原料易得，价格便宜，且颜色变化鲜艳而被广泛使用。 |
| 5. | The research results showed that the dmap is an effective catalyst to synthesize cholesteryl ester compounds . in the reactions , improving yield and purity , reducing toxicity as well as simplifying operation process can be carried out
研究结果表明，高效酰化催化剂法是十分有效的酰化方法，在合成胆甾醇酯液晶中可较大幅度地提高产品的产率与纯度、简化操作、降低反应毒性。 |
| 6. | Phenyl group introducing to cholesteryl ester molecules can enhance the phase transition temperatures of the liquid crystals and their stability . an increase in the chain length for cholesteryl dicarboxylate samples reduced stability of liquid crystal phases . while coattail - like structures on the ester group of the molecules have an adverse effect to form cholesteryl liquid crystal phase
化学结构对液晶性的影响表现为：分子中引入苯环刚性结构可以提高液晶的相变温度和稳定性；脂族二羧酸胆甾醇酯中脂肪链的长度增加会降低液晶的稳定性；而末端含有燕尾结构则对液晶态的形成产生不利影响。 |
| 7. | A super acylation catalyst , 4 - dimethylamino pyridine ( dmap ) , was prepared and used to synthesize cholesteryl ester compounds . four kinds of cholesteryl ester compounds such as cholesteryl p - alkoxyl benzoate , cholesteryl dicarboxylate , cholesteryl lumequeic ester and coattail - like cholesteryl ester were synthesized by acylation method and super acylation catalyst method . chemical structures and liquid crystal behaviors of the synthesized samples have been characterized by using element analysis , ftir , dsc and polarized microscopy with a hot stage
本文合成了高效酰化催化剂4 -二甲基氨基吡啶( 4 - dimethylaminopyridine ， dmap ) ，采用酰氯化法和高效酰化催化剂法分别合成了对烷氧基苯甲酸胆甾醇酯、对称脂族二羧酸胆甾醇酯、烯酸胆甾醇酯及燕尾型胆甾醇酯四类胆甾醇酯衍生物，并进行了化学结构和液晶性能的表征。 |
