Change of chemical composition

D can be regarded as a constant of the system in this experiment since drere is no change of chemical composition involved in tire exchange of radioactive and stable isotopes between the sample and the deposited layer. The solution of this equation with these boundaty conditions is... 

One of the most interesting uses of emission spectroscopy is the study of the action of lubricants 162,166,167 168,169,170). A loaded steel ball is rotated in a fluid bath and made to slide over a diamond window. A contact region is formed which can be measured by the radiant power emitted. A substraction of the ball surface radiation from the total radiation emitted from the contact region was electronically carried out. A study of the emission spectra of a polyphenyl ether and a naphthenic fluid under dynamic conditions was made. The widths of some of the bands of the ether increased dramatically when a certain load (pressure) was exceeded. These increases were correlated with the changes of chemical composition through decomposition of the fluid 170,171). 

Addition polymerisation does not involve a change of chemical composition. In general, it proceeds by a chain mechanism, a typical series of reactions being ... 

Articular cartilage has to sustain changes of chemical composition of the electrolyte and mechanical loads. Its overall bearing capacity is believed to... 

It should be noted that this phenomenon has to be taken into account in thermoprogrammed reactions (TPR, TPS, etc.) for correct interpretation. A shift of a reaction peak to higher temperature should not be automatically attributed to a change of chemical composition of the reactant or to the fact that it is less dispersed [8], The contrary may be true. 

Response time — Although this is often used as a synonym for -> time constant of an - exponential decay, it has a more general meaning For an exponential decay following the differential equation dx/df = -Ax and having the solution x = x0e-/U the - time constant is r = A-1. Of course, beside the time constant t, any other values can be defined for specified ratios of xq/x, e.g., xo/x = 0.5, or x0/x = 0.1, etc. The term response time is frequently used in connection with - electrochemical detectors (and generally for detectors) when their ability to respond to a change of chemical composition of a solution has to be characterized. Supposed the concentration can be stepped with infinite speed from a small... 

Cmolik, J., Davidek J., Pokomy, J. and Valisek, J. (1987) Changes of chemical composition during file processing of double-low rapeseed in Czechoslovakia, in Proceedings of the 7th Rapeseed... 

In order to be categorized as an article, there can be no change of chemical composition during end use, except changes that have no commercial purpose apart from the purpose of the article. For example, when a candle is burned the combustion products have no commercial purpose. Therefore, the EPA has concluded that a candle is an article, and under an explicit regulatory exemption the combustion products are not required to be put on the Inventory. ... 

How to solve the problem of combining the chemical reaction equations and the three equations of gas kinetic theory It s extremely difiicult because of the complexity of chemical reaction inside detonation area. There must be a simplified approach, which stipulates that chemical compositions react stoichiometrically according to some way, and the proceeding variable (1,) of stoichiometric reactions represents the complex changes of chemical compositions. This makes a chemical problem into a physical one. The simplest stoichiometric reaction is Eq. 2.24. 

The proton-containing p- and P"-alumina type compounds, especially the latter are attractive for their high conductivities at intermediate temperatures (100-300 °C). However, the difficulties in making a ceramic electrolyte and subsequent cracking of the disc sample , caused by change of chemical composition with temperature and/or atmosphere coupled with large anisotropic character of the crystal, are serious drawbacks preventing applications. Approaches from different view points look necessary therefore before applications of these compounds become reality. 

Kinetic experiments are experiments in which the change of chemical composition of the reacting mixture is monitored in time and/or as a function of the various parameters of the system, in particular the inlet or initial chemical composition, temperature, catalyst state, and so on. The main paradigm of contemporary chemical kinetics is the following a chemical reaction is complex and consists of a set of elementary reactions for which the kinetic laws are assumed to be known. Kinetic analysis focuses on revealing this set of reactions and developing the corresponding mathematical model, that, is the kinetic model. 

Thermal sintering and changes of chemical composition of catalyst... 

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