查询词典 chitin

This paper deals with making stop bleeding sponge with dried small shrimps. Firstly breaking away with inorganic salt and proteir in the dried small shrimps with acid and NaOH, secondly, taking off vinyl-in the chitin with 50% NaOH, temperature is 110 ℃. the last, reacting with chitosamine and PVA-124 make stop bleeding sponge were produced, catalyst is PdCl 2. The sponge film and sparkce is setatisfaction.

用虾壳经除盐，去蛋白处理后，用50％的NaOH溶液在110℃的温度下脱乙酰基制备壳聚糖；以1∶9的稀醋酸溶作溶剂，氯化钯作催化剂，甲苯二异氰酸酯作发泡剂、交联剂，使壳聚糖与PVA－124进行交联成膜，发泡用氨水洗成中性后在80℃的红外灯烘箱下烘干，制得止血海棉

OBJECTIVE: To introduce the sorts of biomedical fibers, collagenous fibers, chitin fibers polyactic acid fibers, etc., and their preparation,properties and application respectively, and suggest China to pay attention to the research and development of biomedical fiber.

目的：介绍生物医学纤维的种类及甲壳素纤维、骨胶原纤维、聚乳酸纤维等主要生物医学纤维的制备技术、性能和用途，并建议国内应重视生物医学纤维的研究与开发。

The hydrolysis of chitin under concentrated alkali conditions would produce double anion because of conjugative effect and steric effect (producing primary amine which had positive ion properties and linear chain macromolecular structure and which has good flocculability and clarification performance).

因共轭效应和空间效应，甲壳质在浓碱条件下水解，能形成双负离子，形成具阳离子性质的伯胺和具有直链高分子结构，具有优良的絮凝性能和澄清作用。

Insect cuticular proteins are structural proteins, which form the insect cuticle together with chitin and serve as a barrier to the external environment.

昆虫表皮蛋白（insect cuticular proteins， ICP）是结构蛋白，它和几丁质一起组成昆虫抵御外界环境的屏障--角质层。

Use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from Xuyu's local lobster shell.The technology,equipments,operation are simple and have strong popularization.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

Tai zhou Fengrun , now is one of the biggest manufactures specialized in chitin derivant in China .

台州市丰润生物化学有限公司，是国内目前最大的甲壳素及其衍生物专业生产厂家之一。

The critical concentrations in dichloroacetic acid were 0.005,0.015,0.035 and 0.050 respectively for chitin with the molecular weight 2.84×106,1.47×106,9.4×105 and 5.3×105 prepared from different sources.

甲壳素分子量为2.84×106、1.47×106、9.4×105和5.3×105时，在二氯乙酸中的临界浓度分别为0.005、0.015、0.035和0.050。

The essence of deacetylation reaction of chitin was the hydrolysis of N-alkyl ethanamide.

甲壳质脱乙酰化反应其本质是N-烷基乙酰胺的水解。

The location and structures of sex-pheromone-producing gland in female H.insularis were studied by EAG,GC,SEM,and TEM.These studies showed that thegland situate in the intersegmental membrane between the eighth and ninthabdominal segments,and is an eversible abdominal fold;Many plump cones disturbon the surface of the gland.The glandular cells of 2-day old virgin female H.insularis are arranged in one layer,among which the central cells are columnarepithelial cells and flat on two sides.The nucleus is irregular elliptical.There isevident conjugation between cells and the involution is more in the basal membraneof cell.Microvilli are distributed on the cytoplasmic membrane and linked withendocuticle on which there are many layers of chitin,and the outer cuticule is staineddeeper.The cell contains bubbles,mitochondria,glycogen deposits,roughendoplasmic reticulum and smooth endoplasmic reticulum.

结合触角电位、毛细管气相色谱、扫描电镜、透视电镜等技术对小线角木蠹蛾雌蛾腹尖末端不同组织部位提取物的测定分析以及腺体位置和形态结构的观察发现：小线角木蠹蛾性信息素分泌腺位于腹部末端8～9节之间，是一个由节间膜特化而成的上皮结构，为一可外翻的腹褶，腺体表面分布着饱满的锥形体，羽化后2天未交尾的雌蛾腺体细胞呈单层排列，腹面中央由密集的柱形上皮细胞组成，细胞排列向两侧延伸至背部，其形状由柱形逐渐变为扁平形，细胞核为椭圆形，细胞与细胞间有明显的胞连接，细胞基底膜基褶较多，质膜上分布着微绒毛，并与内表皮连接，内表皮上有多层几丁质，外角质层染色较深，细胞质中含有空泡、线粒体、脂质粒、粗面内质网和光面内质网。

In the body, chitin can be digest through by enzyme and is a low immunogenetic poly-saccharide.

壳糖是一种身体可吸收性材料，具有生体可相容性及生体可降解性，并且经由一些体内的酵素分解产生中间产物具有免疫赋活性。

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。