壳聚糖在污水处理中的应用

利用壳聚糖对污水处理的几个重要技术指标，重金属离子含量、水中悬浊物、化学需氧量及细菌含量，分别进行应用试验，从而证明壳糖在水处理方面的应用价值。     

一种制备灭蚊药缓释制剂的方法

众所周知，蚊子是许多疾病的传播媒介，所以防治蚊虫对于减少疾病，提高人民健康水平具有重要的意义．一般的灭蚊药都是配成水剂、乳剂来使用，但是，灭蚊药的这种使用方式在应用于自然界（如直接将乳剂喷在阴沟、水塘）时，易受风吹、雨淋、水流等因素的影响，结果使药物作用时间短，灭蚊效果降低．而且某些灭蚊药（如除虫服等）的水溶液在紫外线照射下易分解而失效．因此进一步改善灭蚊药的给药剂型，提高灭蚊效果是很有必要的．本实验以壳聚糖为基质，制备灭蚊药（除虫豚）的缓释药膜和药珠，以探索灭蚊药缓释的可能性．在实际应用时，可…     

羧甲基壳糖对口腔变形链球菌和口腔乳酸杆菌的抑制作用

从人的口腔中取少量牙垢，经过口腔变形链球菌和口腔乳酸杆菌普通培养培养，再经过专性选择培养基分离及进一步纯化，得到口腔形变链球菌和口腔乳酸杆菌，并进行纯种鉴定，用此浊法测定羧甲基壳聚糖对两种菌的抑制作用。结果表明：ＣＭＣＴＳ对这两种菌都有一定的抑制作用。     

壳聚糖预富集水样中痕量Cr（VI）的研究

以壳聚糖为富集物，研究对水样中痕量Ｃｒ（Ⅵ）的分离富集作用，当试液为ｐＨ为３．１０时，壳聚糖对Ｃｒ（Ⅵ）的富集水效率最高，机械振荡５ｍｉｎ即可达到富集平衡，用０．１０ｍｏｌ／ＬＮａＯＨ洗脱，超声波振荡２ｍｉｎ达洗脱平衡，本法用于自来水中痕量Ｃｒ（Ⅵ）的测定，结果满意。     

Induction of volatile organic compound in the leaves of Lycopersicon esculentum by chitosan oligomer

Induction of VOCs (volatile organic compounds) in the leaves of Lycopersicon esculentum by chitosan oligomer elictor was studied. The results demonstrated that VOCs in chitosan oligomer-treated leaves showed stronger inhibitory activity against Botrytis cinerea than that in water-treated leaves, and the spore germination was reduced by 22.1% in 144h after elicitor treatment at a concentration of 1.0%. A total of 16 constituents were detected in water-treated leaves, and chitosan oligomer treatment increased the amount of VOCs production. Chitosan oligomer at different concentration and different time courses of induction treatment could induce different amount of VOCs. Chitosan oligomer resulted in an optimal production of VOCs in 144h after elicitation at concentration of 0.6%. Chitosan oligomer also enhanced activtity of PAL and LOX. The results showed that the enhancement of VOCs production after chitosan oligomer treatment might be an important agent for L.esculentum acquiring resistance against pathogen.     

壳寡聚糖复合物的制备及对过氧化氢分解的研究

壳寡聚糖是壳聚糖降解以后聚合度为30以下的产物,壳寡聚糖水溶性好,且生物活性强.Fe2+、Mn2+均属于体内所必须的微量元素,对人体健康具有极其重要的作用.过氧化氢是生物体内代谢产物之一,它极易分解生成羟基自由基(HO·),过量积聚容易造成DNA损伤及癌变.本文选择金属铁和锰与壳寡聚糖进行配位,研究了不同温度、pH及反应时间对配位反应的影响,并将不同浓度配比的目标产物应用于H2O2的分解.1实验方法1.1 M-CTS-Fe2+/Mn2+配合物制备条件的优化[1]以去离子水为溶剂,分别加入0.071mmol的四水合氯化锰、0.036mmol硫酸亚铁胺(不超过人体必需…     

Assignment and analysis of electronic rovibrational spectrum of CS + A2∏3/2-X2∑+

A visual mutual computer program is established for the assignment of the rovibronic spectrum of typical transition A2 II - X22. The usage of this program is demonstrated in the analysis of the velocity modulation spectrum of CS+ A n3/2( u = 1)"*~X S+ ( u = 0) . The structure parameters of CS+ are determined by a least-square fit of all assigned spectral lines on the basis of an algebraic model of the energy levels.     

模具有CS性质的环

给出了模具有CS性质的环成为QF环、自内射环和连续环的一个充分条件:定理设R是左Kasch环,对于任意集A,若(R(A)是CS右R模,则R是QF环;(R(2)是CS右R模,则R是右自内射环;(R是CS右R模,则R是右连续环;如果每个CS右R模是X1ΣCS模,那么环R具有有限长度.     

科技书屋

《三维造型设计——AutoCAD2004中文版实例详解》，《CATIA机械设计基础培训教程》，《Photoshop CS中文版图像处理特训教程》，《梵高的梦想——Photoshop平面设计与创作技巧详解》。