纯液体常沸点汽化热的简单计算

在文献[1]的基础上,引入Pitzer三参数对比状态普遍化关系式和Edmister方程式,由最基本的物性数据T_b、T_c和安托固常数计算了25种物质的常沸点汽化热。计算值与实验值间的平均相对误差小于±1％。     

伯塞活脱气体的内能和摩尔热容量

研究了伯塞活脱气体的内能、定压摩尔热容量与定容摩尔热容量之差，并分析讨论了其结果．     

克劳修斯气体的热力学性质讨论

对克劳修斯气体的内能、摩尔热容量、临界参量作了研究,分析了该气体与范得瓦尔斯气体的差异.     

克劳修斯气体的热力学性质讨论

对克劳修斯气体的内能、摩尔热容量、临界参量作了研究,分析了该气体与范得瓦尔斯气体的差异。     

支链烷烃的摩尔折射度与其分子结构间关系的理论探讨

本文根据分子结构的特点,从理论上系统分析探讨了支链烷烃的摩尔折射度与其分子结构的关系,提出一个具有明确结构基础的定量关系.对大量支链烷烃摩尔折射度的计算结果表明,本文定量关系的计算值十分接近实验值,计算结果的平均相对误差为0.10%、平均绝对误差为0.046(μm~3/mol),计算精度显著优于文献上其它方法,是目前计算精度很高的定量关系.应用本文定量关系,不仅能够预测支链烷烃摩尔折射度,而且有助于揭示物质结构性能关系之间的奥秘.     

Plasma proteinase inhibitory activity in ectopic and molar pregnancy

Antitryptic, antichymotryptic and alpha 2- macroglobulin activities were measured in sera of normal nonpregnant and normal pregnant women and women with tubal ectopic pregnancy and molar pregnancies in the first 5 to 7 weeks of pregnancy calculated from the last menstrual period. While alpha 2-macroglobulin decreased in early normal pregnancy compared to nonpregnant state (p<0.001), in ectopic and molar pregnancies there was an increase in alpha 2- macroglobulin activity (p < 0.001), as compared to nonpregnant and normal pregnant women. Antitryptic activity did not increase in normal and ectopic pregnancy, however was increased in molar pregnancy (p < 0.01). Antichymotryptic activities did not show a change either in normal pregnancy or in cases of ectopic and molar pregnancy. Drop in alpha 2- macroglobulin activity to near normal levels in ectopic, 6 weeks post surgery, correlated well with the decrease in β-hCG. However, in molar pregnancy, alpha 2- macroglobulin remained elevated even when the β-hCG levels in serum returned to zero 10 weeks after surgery. The studies suggest a major role for circulating proteinase inhibitors especially alpha 2-macroglobulin in regulating proteinase activity in normal, ectopic and molar pregnancy.     

仙人掌多糖的组成及其摩尔比测定

采用热水浸提法提取仙人掌多糖,多糖经去蛋白、柱层析分离得到两种组分OPA、OPB。OPA、OPB水解物经高效液相色谱及乙酰化气相色谱分析等,得到OPA由鼠李糖、阿拉伯糖、木糖、半乳糖、阿拉伯糖醛酸组成,其摩尔比为:1.13∶2.67∶1.00∶2.82∶1.02,OPB由鼠李糖、阿拉伯糖、葡萄糖、半乳糖、阿拉伯糖醛酸组成,其摩尔比为36.89∶3.56∶1.00∶10.55∶214.40。     

The concept of teaching: a reappraisal

This paper examines the concept of ‘teaching’ in early education and childcare and argues that the activity of teaching, broadly defined, concerns all adults who work in this area and occurs in all phases of the educational system. Bronfenbrenner's (1979 Bronfenbrenner U 1979 The ecology of human development: experiments by nature and design (Cambridge, MA, Harvard University Press)  [Google Scholar]) ecological perspective on human development is applied to conceptualise teaching as (1) adults' attempts to extend children's current phenomenological perspectives of the world; and (2) as being based on adults' ability to capture children's momentum towards learning. The implications of current terms such as ‘practitioner’, and the ways in which ‘teaching’ in early childhood education has been conceptualised, are also discussed.     

对磨牙纵折后保存修复疗效的评价

为了对磨牙纵折后保存修复的疗效作出评价,作者出１９８８年以来,采用修复性保存疗法治疗恒磨牙中部纵向折裂３１４例,经分组对照研究,发现保存治疗的效果与牙纵折前的髓病治疗的方法有明显的关系,提示对纵折磨牙修复保存前必须经彻底髓病治疗。     

槲皮素与铬（Ⅲ）配合物合成及光谱分析

利用槲皮素与铬盐在无水乙醇中回流加热,用三乙醇胺调节PH至中性得到产物.合成配合物用红外光谱、紫外光谱对其结构进行表征,推测出螯合位置发生在槲皮素3-羟基与4-羰基及3＇,4＇-羟基处.并采用TU—1900双光束紫外可见分光光度计研究一系列不同浓度溶液的吸光度,通过摩尔比法确定Cr3＋与槲皮素的配位比为1：1和2：1.