It was demonstrated that the pcr - mediated method to detect the chitinase - producing streptomyces from soil environment is possible and effective , and the primers designed are also qualified 在分子探测基础上，对其中一株链霉菌s93的几丁质酶基因进行了克隆。
The cuticle and the peritrophic matfix of insects acted as physical barriers to pathogens and environmental hazards . both were composed primarily of chitin and protein 几丁质是昆虫表皮和围食膜的重要组成成分，昆虫生长、发育的各个时期都需要一定量的几丁质。
Chitin which absents in vertebrates and plants , is an integral structural component of insect cuticle and fungal cell wall and is a promising target of agrochemicals and drugs 几丁质是昆虫表皮和真菌细胞壁的特征成分，由于存在的特殊性而成为农药和医药研发的独特靶标。
The existences of chitin and chitosan in fungi , methods of preparing , as well as some problems of obtaining chitin and chitosan from fungi were reviewed in this paper 本文就几丁质和壳聚糖在真菌中的存在，从真菌中制备几丁质和壳聚糖的方法，以及目前存在的问题进行了综述。
Zhang xue - kun , tang zhang - lin , chen li et al . effect of partially n - acetylate chitosans to elicit resistance reaction on brassica napus l . , agricultural sciences in china , 2002 , vol2 ( 3 ) 张学昆,唐章林,谌利,李加纳等.脱乙酰化几丁质乙酰化程度对油菜抗性的影响.中国农业科学, 2002 ( 3 )
The distribution network covers more than 20 provinces , cities , and areas . now the " qisheng " medical sodium hyaluronate occupies 35 % of the domestic market , and the medical chitosan , 100 % 营销网络遍布全国二十多个省市、地区。目前“其胜”牌医用透明质酸钠在国内市场占有率达35 % ，医用几丁糖达100 % 。
Cardenas , g . , orlando , p . , edelio , t . , " synthesis and applications of chitosan mercaptanes as heavy metal retention agent " , international journal of biological macromolecules , vol . 28 , pp . 167 - 174 , ( 2001 ) 徐薇如, "几丁聚醣/藻酸钙生物高分子对重金属吸附行为之研究" ,国立交通大学应用化学研究所硕士论文, ( 2000 )
The results showed that the expression of vgb gene could improve cell growth and enhance the production of chitinase with 12 . 1 % higher than that of control under different dissolved oxygen concentrations 在通氧最差时( 150ml 70rpm ) ，两者可相差12 . 1 。此外， vgb基因的表达与几丁酶的分泌有一定的正相关关系。
Chitosan is the product of partial deacetylation of chitin they are the second most abundant polysaccharides in nature , comprising the horny substance in the exoskeletons of crabs , shrimp , and insects as well as fungi 背景和目的几丁质是由n -乙酰葡萄糖胺组成的多糖，它是世界上除纤维素之外含量最丰富的天然多聚物。
Chitin ' s partially deacetylated product is chitosan . unlike these polysaccharides , chitooligosaccharide and oligochitosan , which are the oligomer homologs of chitin or chitosan , are soluble and can be satisfactorily utilized 几丁质部分脱乙酰化产物是壳聚糖，它们的降解产物为几丁寡糖、壳寡糖，具有较好的水溶性，易于分散吸收。
