化学变化

The DSC and FTIR techniques were utilized to analyze the thermal evolution process of the PZT gelation powder with and without acetylacetone agents and the physicochemistry changes of the PZT powders from amorphous to crystal phases.

用DSC和FTIR技术分析了有无乙酰丙酮螯合的两种PZT凝胶粉末的热演化过程；分析了PZT由无定型相向结晶相转化过程中发生的物理化学变化。

This article analyses some basic conceptions that are comparatively vayue or even wrong wrong in the teaching of middle school chemistry, like the definition of chemical change, the influence of concentration on a chemical reaction , the structure of oxacid,and the acidity of sulfuric acid, the acidity of carbonic acid, and the conversion of allotropic substance.

分析了中学化学教学中的几个比较模糊甚至错误的基本概念，如化学变化、浓度对化学反应速度的影响、含氧酸的结构、硫酸的酸性、碳酸的酸性、热化学方程式的表示法、同素异形体间的转化等，并从大学化学角度加以澄清，以便使大一学生更准确地理解和掌握这些基本概念。

According to thermal characteristics of single component, dilative action was analyzed for mixture from the viewpoint of thermal effect.

通过对典型膨胀体系（即聚磷酸铵、三聚氰胺、季戊四醇）中单一活性物质及其混合物的DSC分析，探讨了不同组分之间热效应的叠加现象和相互作用，从热效应角度分析了膨胀反应，初步探索了复杂膨胀现象中物理化学变化的热特征。

These effects were probably the result of some biochemical changes Dr Dunlap saw in the treated ewes.

这些效应可能就是丹拉普博士在经过处理的母羊身上看到的一些生物化学变化的结果。

From the point of the general criterion of equilibrium—— Clausius inequality ,we discussed the various expressions of criteria in terms of the entropy,the Helmholtz energy,the Gibbus energy and the reversibility of physical and chemical changes in different processes with the specified constraint conditions.

本文从平衡判据的普遍规律——克劳修斯不等式出发，按照不同的过程条件，分别讨论了熵判据、亥氏函数和吉氏函数判据以及相变化和化学变化的可逆性判据。

Differential thermal and thermo gravimetric analysis were used to capture the physical and chemical development of the high performance concrete with temperature.

通过热重分析、电镜扫描和汞压力测孔等方法，对高温过程中高性能混凝土材料的物理化学变化以及由此造成的微观结果变化进行了分析。

The chemical properties of gold ink too with acids, alkalis and sulfide contact occur to varying degrees, and that its metallic luster greatly reduced and Kim monlchamus becomes nigrescent, and second, it's easy to gold ink also with air, caused by water vapor chromotropic reactions, so that when you save the Gold Ink containers need to be tightened.

金墨的化学性质不够稳定，跟酸、碱和硫化物接触会发生不同程度的化学变化，而使它的金属光泽性大为降低，金墨就会显得发黑；其次，金墨还很容易跟空气、水蒸气发生化学反应而引起变色，因此，在保存金墨时一定要将容器密封盖严。

Bacteria, like all living organisms, give off unique mixtures of gases; bacterial infections may be diagnosed by the characteristic scents of these gases. Alternately, nonbacterial disorders, such as diabetes, may prompt biochemical changes that alter the smell of a patient's body.

细菌跟所有的有机生命体一样，散发出独特的气体混合物，因此可以通过这些气体的气味特点来诊断细菌感染；而非细菌性疾病，如：糖尿病，可以促成改变病人身体气味的生物化学变化。

The physical and chemical changes and phase transformation of xerogel powder during heat-treatment are examined by means of DTA, XRD. The morphology of wollastonite powder is also observed by TEM.

采用DTA、XRD等研究了CaO-SiO2之凝胶粉末在热处理过程中的物理、化学变化及晶相转变，并通过TEM观察了干凝胶粉末热处理产物的形貌。

The chemical components of eucalyptus and their changes during the alkali sodium sulfite pretreatment and peroxid bleaching process had been studied by FTIR.

用傅里叶变换红外光谱法对桉木中各组分在碱性亚钠法化机浆预处理及漂白过程中的化学变化进行了研究。

The medicinal plant resources of Gentianaceae in Sichuan Province.

四川省龙胆科药用植物资源。

"Some fortuneteller," scoffed the man, I'm the father of THREE children.

" "一些算命"，嘲笑他，"我的父亲有三个孩子。