己唑醇铜配合物抑菌活性与植物生长调节效能

利用目前主流三唑类杀菌剂之一的己唑醇与醋酸铜复配合成己唑醇铜配合物,通过抑菌活性以及植物生长调节活性研究评价新型已唑醇铜配合物的功能特性.结果表明,己唑醇铜配合物对酵母生长的抑制作用强于配体己唑醇,其中浓度为0.05 mmol·L-1配合物的抑菌圈直径是相当浓度己唑醇的1.48倍;同时配合物能够降低植物株高、增加根冠比,提高植物SOD和POD酶活,促进GSH和可溶性蛋白合成,0.03mmol· L-1配合物处理相比对照SOD活性增加了24.65％,POD活性增加了61.06％,GSH含量增加了30.41％,叶绿素含量增加了59.04％;抑制MDA积累,具有植物生长调节活性,其抗氧化特性也优于己唑醇配体.     

虫蜡的药学研究概况

在广泛进行文献检索的基础上,综述了虫白蜡的种属、成分、药理、理化性质,为其深入开发利用提供参考依据。     

米草属药学研究概况

在广泛文献检索基础上,综述了米草属的种属、成分、药理、食用价值及临床应用资料,为其深入开发利用提供参考依据。     

保健型木材花梨木药学研究概况

在广泛文献检索基础上,对花梨木的种属、成分、药理,临床应用等进行了概述,为其深入开发利用提供科学资料。     

鸭儿芹药学研究概况

在广泛文献检索基础上,综述了鸭儿芹的科属、成分、药理、临床应用及保健价值,为其深入开发利用提供基础资料。     

白藜芦醇的药理作用及其合成途径研究进展

白藜芦醇作为一种植物抗毒素存在于多种植物中,是一种二苯乙烯类化合物。对白藜芦醇的药理作用、合成途径的研究现状进行了综述。     

瑞香狼毒营养成分分析与评价

本研究以瑞香狼毒为材料,采用常规营养指标测定方法对其营养成分进行测定。结果表明,瑞香狼毒的干物质(DM)(89.87±0.30)%,灰分(Ash)(5.59±0.62)%,单宁(0.0508±0.0037)%,粗蛋白(CP)(15.00±1.46)%,粗脂肪(EE)(3.47±0.20)%,中性洗涤纤维(NDF)(39.11±0.77)%,酸性洗涤纤维(ADF)(28.7±0.76)%,木质素(ADL)(6.87±0.26)%。同时,其氨基酸和矿质元素种类齐全,含量丰富。研究表明瑞香狼毒各营养成分含量与紫花苜蓿相当,如能实现植株脱毒,则可成为一种潜在的牧草资源。     

用于药用蛋白生产的外源表达系统

利用外源蛋白表达系统生产具有重要价值的药用蛋白是现代生物技术产业的核心内容和研究热点,也是各国政府和制药企业竞相巨额资助的研究领域之一。本文综合分析了目前用于重组药用蛋白生产的原核表达系统、酵母表达系统、昆虫表达系统、哺乳动物表达系统和植物表达系统在表达产量、翻译后加工能力、生产周期、生产成本、适用范围等方面的优劣以及研究现状和最新研究进展,揭示出植物表达系统将在未来重组蛋白大规模生产中占据重要地位。但是现有的各种表达系统都无法单独实现各种重组蛋白高活性、低成本、安全系数高的大规模生产。在相当长时间里,各种表达系统在重组蛋白生产上将长期共存。而通过遗传改造、基因组学、蛋白质组学等研究方法不断改进各种外源蛋白表达系统的性能,不断建立更加优越的外源蛋白表达系统则是大家共同努力的目标。     

Experimental study of the shear strength of soil from the Heifangtai Platform of the Loess Plateau of China

Journal of Soils and Sediments - Loess landslides induced by irrigation are common geological disasters in the Loess Plateau, China. Long-term watering decreases the matric suction and soil...     

Anti-Oxidative Constituents of Ethanol Extract from Buckwheat Seeds by HPLC-Electro-Spray MS

The study investigates major anti-oxidative constituents of ethanol extracts from the seeds of common buckwheat and tartary buckwheat. Ethanol extracts from buckwheat seeds were arranged to react with 1,1-diphenyl-2-picrylhydrazyl （DPPH） free radical. HPLC was used to identify anti-oxidative constituents of the ethanol extracts, and electro-spray MS was used to characterize the structures of these identified anti-oxidative constituents to confirm them. The ethanol extracts of common buckwheat and tartary buckwheat seeds both had DPPH free radical-scavenging effect; HPLC analysis showed that the ethanol extracts of both common buckwheat and tartary buckwheat seeds presented two main anti-oxidation peaks, which correspondingly had same chromatographic retention times and spectral information; electro-spray MS analysis showed that the molecular weights and MS fragmentation patterns of the anti-oxidative constituents in the ethanol extracts from buckwheat seeds were the same as those of rutin and quercetin in the control samples. HPLC- MS/MS was capable of being used to rapidly identify anti-oxidative constituents in the extract of buckwheat seeds, and the main anti-oxidative constituents of buckwheat seed extract were mainly rutin and quercetin, and the anti-oxidative activity of quercetin was higher than that of rutin.