Insecticidal Activity for Benzaldehyde L-Cysteine Schiff Base Combined with Xylosma Wood Vinegar

木醋碱杀虫剂是一种基于木炭副产物木醋液的绿色杀虫剂,是将精馏木醋液、苯甲醛L-半胱氨酸席夫碱、水杨酸按照一定比例配制而成的.以酪氨酸酶筛选模型研究了苯甲醛L-半胱氨酸席夫碱、精馏木醋液、木醋碱杀虫剂对酪氨酸酶的抑制作用,其导致酪氨酸酶活性的半抑制质量浓度(IC50)分别为15,2.53,0.53 mg/m L.探讨了木醋碱杀虫剂对小菜蛾(Plutella xylostella)、棉铃虫(Helicoverpa armigera)、玉米螟(Pyrausta nubilalis)幼虫的杀虫活性,结果表明木醋碱杀虫剂中苯甲醛L-半胱氨酸席夫碱质量浓度达到15 mg/m L时即可对小菜蛾、棉铃虫、玉米螟二龄幼虫达到很好的杀灭效果.急性毒理实验表明木醋碱杀虫剂实际无毒.慢性毒理研究按照3 g/kg给药量连续灌胃3个月,昆明小鼠的肝脏和肾脏并不存在毒理性变化,表明木醋碱杀虫剂没有慢性毒性.综上所述,木醋碱杀虫剂不仅对酪氨酸酶有很好的抑制作用,还对小菜蛾、棉铃虫、玉米螟等常见农业害虫具有较强的毒杀活性,且实际无毒,具有良好的农业应用前景.The wood vinegar was based on by-product in the process of firing Xylosma charcoal.The wood vinegar base insecticide was a new green type insecticide.We mixed the rectificated wood vinegar,benzaldehyde L-cysteine Schiff base and salicylic acid to make the wood vinegar base insecticide proportionally.The inhibition on tyrosinase in screening model of benzaldehyde L-cysteine Schiff base,rectificated wood vinegar and the wood vinegar base insecticide were determined. The half maximal inhibitory concentration( IC50) were 15,2. 53,0. 53 mg/m L,respectively.Additionally,the insecticidal effects on Plutella xylostella,Pyrausta nubilalis and Helicoverpa armigera of wood vinegar base insecticide were investigated.The results showed that the wood vinegar base insecticide could effectively kill the second-stage juveniles of P.xylostella,P. nubilalis and H. armigera. The results showed that the wood vinegar base insecticide had insecticidal effect.The acute toxicological results showed that the wood vinegar base insecticide had no toxicity.In the chronic toxicological experiment,the group was given a gavage of 3 g / kg with the wood vinegar base insecticide in 3 months.We took the liver and kidney in paraffin section and HE staining after executing the Kunming mouse with cervical dislocation method.The results showed that the wood vinegar base insecticide had no chronic toxicity.In conclusion,the wood vinegar base insecticide could not only inhibit the tyrosinase acitivity,but also show good insecticidal effects on P. xylostella,P. nubilalis and H. armigera with low toxicity.The wood vinegar base insecticide had shown good application prospects in agricultural areas.国家自然科学基金(31371857

改性mcm49催化异丁烯胺化生产叔丁胺

研发缓和反应条件下异丁烯胺化生产叔丁胺（原子经济型绿色化工过程）高性能催化剂对于该反应具有重要意义,采用氢氧化钠（NaOH）与十六烷基三甲基溴化铵（CTAB）混合液处理不同模板剂六亚甲基亚胺（HMI）含量的MCM-49分子筛,制备了一系列不同物化性质的MCM-49样品,考察了其在异丁烯胺化过程中的反应性能。结果表明,随着初始样品中模板剂含量的降低（模板剂对分子筛骨架保护作用减弱）,经处理后,催化剂样品的比表面积、外表面积及介孔孔容显著增大,结晶度有所降低,而中强酸量先增大后降低。C150-NaOH/CTAB和C250-NaOH/CTAB样品,在保持较高结晶度的同时,其酸量比H型样品有显著升高,并在异丁烯胺化过程呈现出较佳的反应活性;异丁烯转化率与催化剂中强酸量呈线性正相关,而与样品的织构性质及多级孔结构无明显关联性