查询词典 chitosan

The article introduce the development of chitosan,and summarize the physiological function and the metabolize of chitosan in vivo.

作者简要介绍壳聚糖的发展简史，主要综述了其生理功能及在体内代谢过程的研究进展。

Selenium chitosan could reduce cGMP level, promote Ca(superscript 2+) and cAMP level and cAMP/cGMP ratio, which are all possible mechanisms that selenium chitosan induces NB4 cell apoptosis and inhibite proliferation.

硒化壳聚糖可通过升高细胞钙离子和cAMP含量，降低cGMP含量，增大cAMP/cGMP比值来抑制NB4细胞生长，诱导其凋亡。

The adsorptive effect of chitosan on acidic dye follows a sigmoidal trend. The chitosan-woven fabric after 98% de-acetylation achieved 98% and 95% dye adsorption in reactive dyes; and achieved 93% and 92% dye adsorption in reactive dyes in eight days. The higher the degree of de-acetylation, the better the dye adsorption.

使用去乙醯化98%的几丁聚醣含浸织物吸附材，在经过8天的饱和吸附后，对於种反应性染之吸附效果可达到98%和95%；且对於种酸性染之吸附效果也可达到93%和92%，由此可知去乙醯化程越高，对染的吸附效果越好。

In this paper, the preparation of selenium and arsenic chitosan adducts or complexes were prepared by chemical treatment of chitosan with sodium selenite and sodium arsenite.

硒和砷都是毒性和药理活性兼备的无机无素，近年来硒的抗癌活性功能、其它生物活性功能和砷在抗癌药物中的应用等受到了人们的关注。

Degradation of chitosan by sodium nitrite is a fast and molecular weight-controllable method for preparation of low molecular weight chitosan.

用亚硝酸钠降解壳聚糖是一种制备低分子量壳聚糖的快速且分子量可控的方法。

AIM: To study the affinity with tumor cells through series of N-octyl-N'-succinyl chitosan synthesized by using different molecular weight of chitosan.

目的：以不同分子质量的壳聚糖为原料合成系列的N－正辛基－N'-琥珀酰基壳聚糖，考察其与肿瘤细胞的亲和性，为其作为抗肿瘤药物的靶向载体提供依据。

The analysis of 1H NMR showed that the succinyl group was successfully conjugated to the amino group of chitosan molecule, and the degree of substitution of Suc-Chi values increased with increasing succinic anhydride/amino mole ratio or reducing the molecular weight of chitosan.

利用壳聚糖和琥珀酰酐反应合成了N-琥珀酰壳聚糖，1H NMR分析表明通过反应可在壳聚糖的侧氨基引入亲水性的羧基，增加琥珀酰酐／氨基的摩尔投料比或者选择分子质量较小的壳聚糖，有利于提高N-琥珀酰壳聚糖的琥珀酰化度。

METHODS: A series of N-octyl-N'-succinyl chitosan labeled with fluorescein, were incubated with HepG2 liver cancer cells, K562 leukemia cells, A549 human lung cancer cells, and BGC cancer cells respectively and followed by using flow cytometry and enzyme-linked immunosorbent assay to assess the affinity and inhibition of N-octyl-N'-succinyl chitosan for the four kinds of tumor cells already mentioned.

用异硫氰酸荧光素对N-正辛基－N'-琥珀酰基壳聚糖进行标记，再分别与人肝癌细胞(HepG2)、人白血病细胞(K562)、人非小细胞肺癌细胞(A549)及人胃癌细胞共培养，通过流式细胞仪及酶联免疫检测仪测定N-正辛基－N'-琥珀酰基壳聚糖对肿瘤细胞的亲和性及抑制力。

METHODS: Fresh bovine tendo calcaneus collagen was dispersed in 0.5 mol/L acetic acid, co-precipitated with chitosan and lyophilized. Dry membranes were cross-linked in 0.05% glutaraldehyde for 24 hours. In vitro its degrading rate was measured by use of collagenase degrading test. The chitosan-collagen membrane was implanted to subcutaneous dorsal sites of SD rats. After implantation, histocompatibility, vascularity and degradation were observed in vivo.

以酸溶法制备胶原溶液，添加一定比例的脱乙酰化几丁质，冻干成膜，0 。0 5 %戊二醛溶液浸泡交联，行体外酶降解实验，检测其耐受酶降解能力；将制备的几丁质-胶原蛋白膜包埋于 36只 SD大鼠皮下，术后 3、5天，1、2、3、4、6、8和 12周取材，检测其组织相容性、血管化能力及材料在体内降解情况。

Scientific and technological achievement of the Ninth Five-year Plan of China--- Paiqian Capsule, developed by CAS Dalian Institute of Chemical Physics, is made from Chitosan and Chitosan Oligosaccharide extracted from organism living in deep sea, and extracts of liquorice and Tuckahoe with modern advanced biochemical technology.

国家"九五"攻关科技成果派其安胶囊，由中国科学院大连化学物理研究所研制，该产品是以深海海洋生物中提取的壳聚糖和壳寡糖为主要成分，辅以甘草和茯苓的有效提取物，利用现代生化技术精制而成的胶囊剂型天然海洋生物制品。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。