Identification of candidate genes for fenvalerate resistance in Helicoverpa armigera using cDNA-AFLP

A cDNA-amplified fragment length polymorphisms approach was undertaken to screen for candidate genes associated with fenvalerate resistance in the AN02 strain of Helicoverpa armigera. Larvae and adults of this strain manifest ~50-fold resistance, which is suppressible by piperonyl butoxide and controlled by the semidominant gene RFen1 previously mapped to AFLP Linkage Group 13. Two cytochrome P450s ( CYP337B1 and CYP4S1 ), one carboxylesterase-like protein and one glutathione transferase were found to be constitutively upregulated in resistant insects. Mapping of these potential detoxification genes showed that one of them, the novel P450 CYP337B1 , was tightly linked to the resistance locus. This suggests that the RFen1^R allele has a cis -acting effect on CYP337B1 expression, and possible trans -acting effects on expression of other genes.     

门诊青霉素皮试消毒应用复合碘棉签的试验观察

目的观察复合碘棉签在青霉素皮试皮肤消毒中的应用效果,寻找一种更好的皮试皮肤消毒剂。方法门诊做青霉素皮试的患者1 200例,随机分为试验组和对照组,各600例,试验组采用复合碘棉签消毒皮肤;对照组采用75%乙醇消毒皮肤。结果用复合碘棉签消毒对皮肤过敏少、着色微,结果判断清楚,青霉素假阳性率低于对照组(0.50%vs.3.33%,P<0.01)。结论复合碘棉签致青霉素皮试结果假阳性率低,是理想的皮试皮肤消毒产品。     

全棉布及医用皱纹纸类包装物品的灭菌效果及有效期探讨

目的探讨全棉布、医用皱纹纸类包装材料包装的物品经高压蒸汽或环氧乙烷气体灭菌,能否达到完全无菌;研究在不同存放条件下和不同灭菌方法,两种材料包装灭菌物品的存放有效期。方法将医用皱纹纸和全棉布包装医疗器械,分别进行高压蒸汽和环氧乙烷灭菌,存放在无菌、清洁、污染场所共5个,分别于灭菌的当天、7d、14d、1个月、2个月、3个月、4个月、5个月、6个月做细菌培养。结果全棉布和医用皱纹纸用于包装医疗用品能达到灭菌效果,且在半年内能保持无菌状态。结论建议根据本医院的实际情况,将全棉布的制作和清洗费用与医用皱纹纸的成本进行比较,进行选择。     

Mechanism of Bonding Reactive Dyes with Copolymer (chloromethyl)oxirane-1H-imidazole cationised Cellulose

Introducing the cellulose chain cationic groups in the modification process completely changes the charge on the cotton surface from negative to partially or totally positive. That allows the electrostatic attraction and simultaneous exhaustion and fixation of reactive dyes. This reaction can be carried out without salt and alkali at room temperature. Similarly, the reaction between reactive dye and an alone copolymer ([IME]⁺Cl⁻) with TLC chromatography was confirmed. The analysis with the use of particle optimisation with MM+ molecular mechanics and quantum-chemical calculations PM3 by the method of all valence orbitals confirmed the experimental results of the high activity of the nucleophile formed on the hydroxyl group in the chain of a modifier. It was found and experimentally confirmed that the reactive dyes during the dyeing process of the cotton cationised with copolymer (chloromethyl)oxirane -1H-imidazole ([IME]⁺Cl⁻) create covalent bonds due to a reaction with the hydroxyl group located in the modification agent instead of with the hydroxyl group in the glucopiranose ring. Although the dyeing takes place in very mild conditions, a high degree of setting is achieved, comparable to conventional methods.