LSY混凝土增效剂对水泥基材料性能影响的研究

本文主要介绍了LSY混凝土增效剂对水泥净浆、胶砂强度及中低强度等级混凝土工作性和强度的影响。结果表明:当LSY混凝土增效剂的浓度为6%,掺量为0.6%时,与水泥和外加剂的适应性良好,净浆流动度为210mm,粘度值由2700Pa.s提高到7100Pa.s,该掺量下的水泥胶砂强度也提高了1MPa^5MPa。对于中低强度等级C20~C30的混凝土,掺入0.6%的LSY混凝土增效剂后,坍落度和扩展度有所增长,混凝土的3d、7d、28d、56d和90d的抗压强度均有所增加,28d强度增长3MPa^6MPa左右,与56d抗压强度相比,90d的强度仍有所提高。

HEMOGLOBIN WUMING (all [A9] Lsy→Gln), A NEW HEMOGLOBIN VARIANT FOUND IN CHINA

During the survey of hemogiobinopathies, a fast moving hemoglobin was found in one Chinese male of Zhuang nationality in Wuming County of tire Zhuang Autonomous Region of Guangxi. Same electrophoretic bands were found in seven persons in his family. The propositus was healthy in appearance, having no clinical symptom at all and being normal also in haemotology. The abnormal hemoglobin in his hemolysate was evaluated by cellulose acetate membrane electrophoresis and found to be 19.4%. Isolation of the globin chains was performed by CM-cellulose chromatography in 8M urea and one fast chain (a^x chain)

凉山民族地区学前教育的问题与对策

随着《国家中长期教育改革和发展规划纲要(2010-2020年)》的发布,学前教育、民族教育被提上国家教育的日程。凉山彝族自治州作为全国最大的彝族聚居区,其学前教育的发展直接关系着我国民族地区教育事业、学前教育事业的发展。本文从总体着眼,分析目前凉山州学前教育存在的问题及产生的原因,并提出相应的解决对策。

浓丝源防脱发素的应用研究

本文介绍了浓丝源防脱发素的生产工艺、理化卫生指标、安全性实验及其在洗发香波中的应用。浓丝源防脱发素的生产工艺简单合理,便于工业化生产;其理化卫生指标符合化妆品添加剂的要求;它安全无毒,在香波中的用量以5％为最佳。