Distribution of malathion in body tissues and fluids.

Six cases of suspected poisoning were studied. The various body tissues and fluids of all the cases were analysed and malathion was found positive. The quantitative analysis was performed using high performance liquid chromatography. The distribution of malathion was studied in lungs, liver, kidneys, spleen, brain, heart, blood, muscles, urine and gastric contents.     

论城市信息化及其经济社会影响

中国的城市信息化起步较晚,但发展迅速,已经成为推动城市经济社会发展的重要力量。信息化对城市经济社会发展的影响体现在三个方面：推动城市经济发展观和经济增长方式的转变;推动城市治理理念的发展和治理方式的革新;促进城市居民生活方式的转变和社会秩序基础的变革。     

大学生择业挫折教育的现实难点及路径选择

为了使大学毕业生理性择业、克服挫折,高校择业挫折教育应当与时俱进,不仅要充分发挥大学生在择业挫折教育中的主体作用,而且要主动与家庭、社会有关部门合作,营造＂合力＂,借鉴国外大学生择业挫折教育的经验,促使大学毕业生顺利就业。     

1923年-1924年广州关余事件中的民众运动

发生于1923年-1924年的广州关余事件,由最初孙中山领导的广州政府单方面交涉,到后来孙中山在中共协助下,借助民众力量,迫使列强作出让步.在整个交涉过程中,民众介入所起的作用,是不应忽视的,但以往人们多着重于政府问的交涉过程,对民众的作用较为忽略,本文拟对此再略作探讨.     

Occurrence of Organochlorine and Organophosphorus Pesticides in M. scabra and M. tuberculata Species in Tighra Reservoir,Gwalior, India

The concentrations of organochlorine and organophosphorus pesticides were determined in surface sediments and freshwater molluscs (Melanoides scabra and Melanoides tuberculata) from Tighra Reservoir in Gwalior (Madhya Pradesh). This reservoir is important not only for agricultural and drinking purposes, but is also located in close proximity to Great Indian Bustard sanctuary. The different types of organochlorine and organophosphorus pesticides were found in sediments and in the soft tissues of M. scabra and M. tuberculata. The concentration of different organochlorine and organophosphorus compounds were higher during winter seasons in sediments. On an average, M. scabra accumulated more organochlorine and organophosphorus compounds compared to M. tuberculata. Out of targeted 21 pesticides, 14 were found in the species selected for the present investigation.     

Status of Organochlorine and Organophosphorus Pesticides in Wetlands and Its Impact on Aquatic Organisms

In recognition of the potential risks that certain chemicals pose to aquatic ecosystems and human health as well as the lack of information regarding the levels of such compounds, the present study analyzed the status of different organochlorine and organophosphorus pesticides in wetland ecosystems of the world. With the goal of helping to achieve sustainability in wetland ecosystems, this study attempts to provide data on pesticide usage and presence in water, sediments and organisms, along with the awareness within affected farming communities.     

High performance liquid chromatographic method for the analysis of organophosphorus and carbamate pesticides

A method has been developed for the rapid quantitative analysis of organophosphorous and carbamate pesticides using HPLC. Good separation was obtained among the four major groups of organophosphorus pesticides [i.e. aryl phosphorothionate (methyl parathion), alkyl phosphorothionate (malathion), enolphosphate (phosphomidon, monocrotophos, dichlorvos), heterocyclic phosphorothionates (quinalphos)] and carbamates [viz. Carbaryl (Sevin) and Baygon (Dalf)] with a detection limit of 100 ng for all the pesticides. Separation was measured in terms of capacity factor (k') resolution (R) and selectivity factor (alpha ii). The method described can be used for the analysis of biological samples for the presence of organophosphorus and carbamate pesticides in the cases of poisoning. Recovery studies were made in the blood, lung and liver and found to be 85-97% with reproducibility at greater than 95%.