查询词典 phosphatidylcholine

With egg yelk as raw material, extracted by aquiferous ethanol and aether, removing water and oil by acetone, we gain phospholipids mixture, and search the extracting conditions. The optimum condition is determined:extracting temperature (20 ), time (60mins), solvent (92%ethanol),solvent quantity (12 times of the yelk), at which yield is highest; using thinlayer chromatography to measure its component, the content of phosphatidylcholine extend to 68.2%.

本文以鸡蛋的卵黄为原料，采用含水乙醇与乙醚提取，通过丙酮脱水去油，得到粗品卵磷脂；并对提取条件进行了优化研究，结果表明：提取时间60分钟，用92％乙醇，加入含水乙醇是蛋黄重的12倍，在20℃时，卵磷脂收率最高；采用薄层扫描法定量检测，所得粗品卵磷脂的纯度高达68.2％。

Process for the preparation of phosphatidylserine of formula wherein R and R independently represent a saturated, mono-unsaturated or polyunsaturated acyl C10-C30, X=OH or OM where M=alkaline or alkaline earth metal, ammonium, alkylammonium including the transphosphatidylation reaction between phosphatidylcholine of the general formula wherein R and R and X have the above specified meanings, R=CH2-CH2- NH2 o CH2-CH2-N(CH3)3 and Serine in D, L or racemic form catalysed by the phospholipase D enzyme, characterised in that said reaction is carried out in a hydroalcoholic medium containing an aliphatic alcohol and in the presence of bivalent metal oxide.

本发明涉及制备式CH 2 OR 1 CHOR 2 CH 2 O-P-OCH 2 -CH(NH 2 )-COOHX的磷脂酰丝氨酸的方法，其中R 1 和R 2 独立地表示饱和的、单不饱和的和/或多不饱和的酰基C 10 -C 30 ，X＝OH或OM，其中M＝碱或碱土金属、铵、烷基铵，该方法包括通式CH 2 OR 1 CHOR 2 CH 2 O-P-OR 3 X的磷脂酰胆碱其中R 1 和R 2 以及X具有上述特别的含义，R 3 ＝CH 2 -CH 2 -NH 2 或CH 2 -CH 2 -N (CH 3 3 与D、L或外消旋形式的丝氨酸之间的转磷脂酰化反应，该反应是通过磷脂酶D酶催化的，其特征在于所述的反应是在包含脂族醇的含水醇介质中并且在二价金属氧化物的存在下进行的。

Phosphatidylcholine is a kind of phospholipid, which has special character and physiological function. It widely used in food, cosmetic, and pharmaceutical industries. In particular, it is promising to prepare liposomes and pharmic emulsifier.

磷脂酰胆碱，是一种磷脂，具有特殊的理化性质和生理功效，广泛应用于食品、医药、化妆品等领域，尤其在作医药乳化剂和脂质体制备方面具有广阔的前景。

Feeding with rapeseed oil reduced the reacylation activity in both pathways, explaining the high accumulation of lipid droplets in the supranuclear portion of the intestinal epithelium, whereas soyabean oil enhanced phosphatidylcholine synthesis, being associated with the increase in VLDL found in previous studies.

虽然大豆油脂促进了卵磷脂的合成，以前的研究证实与超低密度脂蛋白的升高有关。

A compound artificial synovia was prepared by adding Lα-dipalmitoyl phosphatidylcholine riposomes and γ-globulin to a saline of sodium hyaluronate,by which two kind of tribology slider pairs-PVA-PVA-H/VA-H and PVA-

在透明质酸为主要成分的人工关节润滑剂中添加Lα－DPPC磷脂和γ－球蛋白，配制成复合人工滑液，在PVA－H／PVA－H，PVA－H／316L S。

To improve the stability of small unilamellar vesicles in vitro, the permeability of SUV from soybean phosphatidylcholine coated by collagen and chitosan was studied respectively by using 5(6)-Carboxyflourescein5(6-CF as a fluorescence probe.

为了提高小单层脂质体（SmalUnilamelarVesicles，SUV）的体外稳定性，以5（6）－羧基荧光素（5（6）－CF）为荧光探针，研究了脂质体被胶原蛋白和壳聚糖这两种天然生物大分子包覆后的通透性。

In contrast to the denaturing effect of Triton X-100, phosphatidylcholine had positive role in maintaining the structure and function of PSⅡ membranes.

与Triton扰动膜脂结构产生的影响不同，磷脂酰胆碱重组对PSⅡ膜复合物的结构和功能的维持具有正效应。

In order to improve the content of phosphatidylcholine, a study has been carried out on the use of acetone and alcohol to extract PC from soybean lecithin .

研究了以浓缩大豆磷脂为原料，采用丙酮和乙醇作溶剂，经丙酮脱油、真空干燥、乙醇抽提、减压蒸馏浓缩制备高含量磷脂酰胆碱的提纯工艺。

The results show that the purities of phosphatidylcholine samples refined by different methods differ from each other and have significant difference.

利用高效液相色谱测定了不同精制提纯方法制备的磷脂酰胆碱试样的纯度。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。