我国科技资源共享的有效路径探究

分析了我国科技资源共享实践的起步及其现状,其表现为科技基础设施的共建共享已经展开;科技文献保障共享体系初步形成;科学数据的共享有长足的进展;网络科技环境建设已经起步。指出了共享实践中存在的一系列问题及其根源,总结了国外科技资源共享实践的有益经验,在此基础上提出了我国科技资源共享的有效路径。主要是借鉴国际社会的共享经验;制定和实施共享战略;建立科学的科技资源管理体制和投入体制;制订共享政策法规营造共享的社会氛围;建立科技资源共享机制与相关制度及进一步构建科技资源的共享体系等。     

Genetic analysis and mapping of rice （Oryza sativa L.） male-sterile （OsMS-L） mutant

A rice male-sterile mutant OsMS-L of japonica cultivar 9522 background, was obtained in M4 population treated with ^60Co γ-Ray. Genetic analysis indicated that the male.sterile phenotype was controlled by a single recessive gene. Results of tissue section showed that at microspore stage, OsMS-L tapetum was retarded. Then tapetal calls expanded and microspores degenerated. No matured pollens were observed in OsMS-L anther locus. To map OsMS-L locus, an F2 population was constructed from the cross between the OsMS-L (japonica) and LongTeFu B(indica). Firstly, the OsMS-L locus was roughly mapped between two SSR markers, RM109 and RM7562 on chromosome 2. And then eleven polymorphic markers were developed for further fine fine-mapping. At last the OsMS-L locus was mapped between the two lnDel markers, Lhsl0 and Lhs6 with genetic distance of 0.4 cM, respectively. The region was delimited to 133 kb. All these results were useful for further cloning and functional analysis of OsMS-L.     

铁磁流体粘度测量研究

铁磁流体是一种由大小为１０ｎｍ的固态磁性微粒，它是通过表面吸附活性剂均匀分散于载体中形成的超稳定性的胶体悬浮液，在外加磁场作用下，磁流体的粘度随磁场强度的变化而变化，本作通过自行研制的旋转式、落柱式和细管式磁流体粘度计，对铁磁流体在磁场作用下的粘度变化进行了测量研究。     

二茂铁及其衍生物在分析中的应用Ⅲ——二茂铁阳离子紫外分光光度法测定食品中微量铁

本文研究了二茂铁阳离子的紫外吸收光谱并用于食品样品中微量铁的测定.选氯仿做溶剂兼萃取剂,lN盐酸做介质.在选定的操作条件下,试剂二茂铁与Fe~(3-)发生氧化还原反应,产生的二茂铁阳离子转入水相.测其紫外吸收光谱,λ_(?)=250nm. ε=4.8×10~3.Fe~(3-)含量在0～6ppm范围内符合比尔定律. 本法用于食品样品中铁的测定,与邻菲罗啉法对照,结果是满意的.对于铁含量在1～15mg/100g的试样,误差不大于3％,相对标准偏差在5％以内.     

盐浴铬钒复合渗工艺试验及应用

本文论述了T10,GCr15钢在熔融硼砂盐浴中先渗铬然后渗钒复合处理的工艺条件。观察和分析了铬钒复合碳化物层的组织和相结构。比较了复合碳化物层与单层碳化物的硬度和耐蚀性能。对复合碳化物层的形成进行了初步探讨。     

A novel thermophilic endoglucanase from a mesophilic fungus Fusarium oxysporum

Cellulose is an abundant and renewable energy re- source on earth. Microorganisms produce multiple en- zymes to degrade cellulose, known as cellulase sys- tem[1]. Components of cellulase system were first clas- sified based on their modes of catalytic act…     

Structural Features and In-service Inspection of the LTNHR-200 Pressure Vessel

The pressure vessel of 200 MW low temperature nuclear heating reactor (LTNHR-200) is the main part of primary pressure boundary and its reasonable and reliable structural design is the key point to assure the safe operation of LTNHR-200. The double-shell pressure vessels were designed. LTNHR-200 pressure vessel meets the condition of Leak Before Break and has a relatively low failure probability. Metal containment (outer pressure vessel) has the similar features to LTNHR-200 pressure vessel. There exists no LOCA and core melting with the double vessel. The in-service inspection of the pressure vessel can be simplified greatly because of the safety and structural features of the reactor.     

锑铌施主掺杂对BaTiO3基LPTC电阻的影响

研究了Sb2O3,Nb2O3不同施主掺杂BaTiO3基热敏LPTCR性能,对掺Sb2O3和掺Nb2O3的热敏陶瓷复合制得的LPTC进行了研究,对其机理进行了讨论。     

浅谈湿陷性黄土公路路基的处治

在湿陷性黄土地区,采用冲击压实、强夯等先进、科学的路基施工新技术,能够很好地处理高等级公路建设中的不良土质和地基的路基施工,使这些地区高等级公路路基的压实度等各项技术指标更好地达到规范标准要求,不仅缩短了工期,而且进一步提高了工程质量,减少了工程造价.     

全国与黑龙江省大学生身体常数指标的比较研究

通过对黑龙江省11所大学学生的身体形态、生理机能、身体素质的测试,以17204名学生的体质测试成绩为依据,结合全国大学生的体质监测样本数据,运用数据截取和数理统计法,根据一般身体常数指标进行分类,对男女大学生的体质特征进行了分析与对比.