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In this study blood samples are taken from two groups of people, one that has direct exposure to pesticides (agriculturists & public health workers) the second group, which has indirect exposure to pesticides through food chain. The objective of our investigation is to analyze the blood of the patients with minimum health complaints and skin diseases for the residue of the banned organochlorine pesticides DDE and BHC using Gas Chromatography. High concentrations of both BHC&DDE were observed in the serum samples of the people who had direct exposure to the pesticides, namely agriculturalists and public health workers with few exceptions. The pesticide residue concentration in serum ranges from 0.006 to 0.130 ppm for BHC and 0.002 to 0.033 ppm for DDE. Significance of this study reveals that the presence of these banned pesticides in human serum.  相似文献   
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This article gives both the pedagogic and scientific thinking that guided the construction of a classroom role-play—The Great Evolution Debate. This role-play is about the publication of Darwin's The Origin of Species, which is supposed to be on trial for blasphemy. Historical characters are used to show the range of ideas which were current at that time. The literature on learning history, and on learning about the nature of science, is discussed, leading to an examination of historical empathy as a classroom objective. The reasons for including the various characters in the role-play are explained. The exercise has been used by 15 to 16-year-old students in British high schools with considerable success, and some tentative findings about learning from role-play are drawn from its observation.  相似文献   
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Social‐sexual communication at work may contribute to either the initiation of an organizational romance or sexual harassment. We examined forces that influence perceptions of sexual messages as harassing rather than flirtatious. We presented 94 working adults with questionnaires soliciting workplace attitudes and experiences. Then, participants reviewed newsletters describing male and female coworkers in a fictitious organization. Finally, participants evaluated the degree of sexual harassment evident in six hypothetical interactions wherein one of the employees introduced in the newsletter makes a suggestive remark to his or her coworker. Newsletters and questionnaires manipulated the explicitness of messages, the initiator's status as supervisor versus subordinate, the attractiveness of the message initiator and target, and the initiator's sex. Message explicitness accounted for 88% of the variance in perceptions of harassment. A five‐way interaction among message and situational cues suggested that perceptions of sexual harassment are also influenced by contextual information. Females rated highly explicit messages as more harassing than did males, and individuals who were more accepting of socializing or dating between coworkers rated scenarios as less harassing. Exposure to socializing at work had a curvilinear association with perceptions of harassment such that low to moderate exposure corresponded with perceptions of greater harassment and moderate to high exposure was associated with lower ratings of sexual harassment. The discussion highlights applications for sexual harassment training programs within organizations.  相似文献   
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