经济植物复层栽培对三峡库区水土保持和移民经济的作用

三峡库区森林覆盖率低，水土流失严重。三峡工程兴建后，由于大量耕地被淹，移民后靠，库区的生态环境与移民经济之间的矛盾将会更加突出。本文提出了经济植物复层栽培方法，对其在减少库区水土流失、改善库区生态环境和解决库区移民经济方面的作用作了全面的论述。经济植物复层栽培是解决三峡库区生态环境和移民经济的基本途径，采用扩大种植农作物的方法来解决三峡库区移民经济问题将会加剧水土流失，使生态环境更加恶化。     

Normal karyotype in cultured chorionic villus cells,but mosaicism in amniotic and fetal cells

A case with a normal male karyotype in cultured chorionic villus cells, but 46,XY/45,X/ 46,X,i(Yq) mosaicism in amniotic and fetal tissue is reported. The fetus was a phenotypic male. Pathological examination revealed discrete features, which might indicate a syndrome, and histological examination showed large, bright cells in the tubules of the testes. Possible explanations for discordance between the karyotype of embryonic and extraembryonic tissue are discussed.     

Effect of complex nitrogen source on the synthesis and accumulation of poly(3-hydroxybutyric acid) by recombinantEscherichia coli in flask and fed-batch cultures

When a recombinantEscherichia coli XL1-Blue harboring pSYL105 was cultured in a complex medium, a poly(3-hydroxybutyric acid) (PHB) concentration of 7.16 g/L was obtained in 48 h. However, a PHB concentration of only 0.91 g/L was obtained in 60 h by culturing in a defined medium. Also, fed-batch culture in a defined medium resulted in considerably lower PHB accumulation than in a complex medium. With the aim to produce a high concentration of PHB at a reduced medium cost, we examined 10 complex nitrogen sources for their ability to promote PHB synthesis in a defined medium. Tryptone, casamino acids, and casein hydrolysate promoted PHB synthesis to a higher extent than the others tested. PHB synthesis was also enhanced during fedbatch cultures when a defined medium was supplemented with various complex nitrogen sources. With tryptone supplementation a PHB concentration of 66.7 g/L could be obtained in 44 h. Yeast extract was less effective for promoting PHB synthesis than tryptone. Corn steep liquor, which did not enhance PHB synthesis significantly, could promote PHB synthesis considerably when supplemented together with yeast extract in both flask and fed-batch cultures.     

重大危险隐患的安全评价与安全文化建设

科学地实施危险隐患（重大事故隐患、爆炸危险场所）的安全评价，发现重大事故隐患，运用实际检测数据进行量化评估与分级，与此同时，认真注意有针对性的安全文化建设，提高员工的安全意识，达到对危险隐患进行安全管理的目的。     

倡导安全文化提高全民安全素质

论述倡导和弘扬安全又化，提高全民安全又化素质是一项战略性大举措；探讨倡导安全文化的意义及其发展方向；指出安全文化知识应全民必修；研讨安全文化的传播和继承；认为安全文化是高雅易懂的大众文化；提出安全文化建设的思考与建议。全文贯通了劳动部李伯勇部长倡导安全文化的主导思想以及对安全文化建设的关心、指导。     

乡镇企业的工伤问题初探

本文总结了珠江三角洲地区部分乡镇企业发生工伤事故的现状、职业安全卫生方面存在的问题及由工伤事故所造成的经济损失的思考等。从研究的资料分析发现，近几年乡镇企业中工伤事故重伤率在１８．００／１０万以上，死亡率在７０．００／１０万以上，均高于国有企业。其中重伤率以村办企业（２．４１‰）和中外合资企业（１．９６‰）最高，死亡率以村办和国内独资企业最高（０．３３‰，０．２９‰）。     

地震事业单位深化改革的思考与实践

从地震事业经费严重不足、地震事业经费的计划体制与当地经济和社会发展脱节、地震系统内部人财物尚有很大潜力没有挖掘等方面阐述了地震事业单位深化改革的必要性,对结构调整、领导体制、内部管理体制等方面如何深化改革提出了建议。同时简要介绍了江苏省地震局深化改革的基本思路、做法、初步成效、问题和希望。     

企业推广ISO14000的瓶颈及营销对策

分析了企业推广实施ISO14000的表现特征和制约"瓶颈",提出ISO14000认证企业必须倡导绿色营销战略。     

曲阜市文化旅游资源及其开发利用

文化旅游资源是曲阜市的优势资源，文在分析其文化旅游资源特点和开发利用的区内外环境条件的基础上，提出了曲阜市文化旅游资源开发利用的基本战略。     

论人的失误

人的失误所造成的事故占事故总数的７０—８０％，研究人的失误对控制伤亡事故的发生具有重要意义。为此，分析人的行为模式，论述人失误的原因，并对控制人失误的方法进行了探讨，认为减少人失误的根本途径是大力倡导安全文化，提高操作者的安全素质。