由化学热力学原理探讨了物质稳定性的概念，并根据过渡态理论分析了物质的稳定性和反应活性的关系。
The conception of the stability of substance is discussed on the base of essential principle in chemical thermodynamics.
在固定床上，考察了反应温度、浓度、空速等对催化剂活性和选择性的影响及催化剂的耐热稳定性。
The effects of reaction temperature, concentration, space velocity etc. on the activity and selectivity of the catalyst as well as its thermal stability were examined in fix bed reactor.
利用超细粒子并选用适当的助剂提高了F-T过程的反应活性，选择性和热稳定性。
The activity, olefin selectivity and thermal stability of F -T catalyst can be improved by using ultrafine particle with a suitable promoter.
催化燃烧与汽车尾气净化反应对催化剂的共同要求是具有良好的低温活性和高温热稳定性。
The common requirements for catalyst materials in methane combustion and automotive exhaust purification are higher low-temperature activity and high-temperature stability.
实验结果表明这些固体酸催化剂对于低级脂肪酸的酯化反应具有较高的酸催化活性、选择性和稳定性。
The results have shown that the series of catalysts have higher acid catalytic activation, stability and selectivity to lower fatty ester.
研究了SAS型固体酸和几种分子筛上氧化苯乙烯液相重排成苯乙醛的反应，考察了催化剂的活性、选择性和和稳定性。
The method of liquid phase rearrangement of styrene oxide to phenylacetaldehyde catalyzed by SAStype solid acids and molecular sieves was studied.
业已表明，钙信使参与植物抗逆反应，施钙有利于维持活性氧代谢平衡和维持细胞膜结构稳定性和功能。
The result is that calcium-CaM messenger take partin plants' resistance reaction. Calcium fertilizers can keep the balance of AOmetabolism and keep the steady structure of cell velum.
业已表明，钙信使参与植物抗逆反应，施钙有利于维持活性氧代谢平衡和维持细胞膜结构稳定性和功能。
The result is that calcium-CaM messenger take partin plants' resistance reaction. Calcium fertilizers can keep the balance of AOmetabolism and keep the steady structure of cell velum.
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