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Associate formation rate

If a silicon electrode is anodically oxidized in an acidic electrolyte free of HF, the oxide thickness increases monotonically with anodization time. This is also true for alkaline electrolytes if the oxide formation rate exceeds the slow chemical dissolution of the anodic Si02. This monotonic behavior, however, is not necessarily associated with monotonic current-time or potential-time curves. [Pg.79]

Another factor which increases outer-sphere association and leads to an increase in formation rate is caused by stacking interactions (27). In 1966 Wilkins (28) observed that the rate... [Pg.19]

In the ion association extraction systems, hydrophobic and interfacially ad-sorbable complex ions are included very often. Cationic complexes of Fe(II), Cu(II), and Zn(II) with 1,10-phenanthroline (phen) and its hydrophobic derivatives exhibited remarkable interfacial adsorptivity, although the legends themselves can hardly adsorb at the interface, unless they were protonated [68-70]. The extraction rate profiles of Fe(II) with phen and its dimethyl (DMP) and diphenyl (DPP) derivatives into chloroform were investigated by HSS method. In the presence of 0.1 M NaC104, both of the formation rates of phen complex and its interfacial adsorption were remarkably dependent on the counter anions of Cl- and CIO4. The initial extraction rate of Fe(II) was described by the equation... [Pg.299]

PCDD/F Formation Mechanisms. With regard to issue (3), a recent development is the evidence of in-flight formation of PCDD/Fs. Measured formation rates for in-flight formation have been much higher than those for static formation,28, 33 34 but they inevitably apply over relatively short residence times of gas-solid contact. Moreover, it has been proposed that the enhanced catalytic activity is associated with freshly produced ash, and that this activity diminishes inherently over periods of the order of 0.1-1 second.34... [Pg.173]

Figure 56 uses the example of associate formation between the ionic defect O and the electronic defect h to emphasize that the strict treatment requires the solution of coupled diffusion-reaction relationships, describing the general (electro-)chemical reaction scheme with individual diffusion or rate constants as parameters (cf. Section VI. 2). Source terms (q) must be taken into account in the relevant continuity equations, e.g., for defect B that can be created by... [Pg.118]

The aggregates are polymerization inactive their formation is accompanied by a corresponding decrease in the polymerization rate [96], Aggregate formation is not limited to siloxane monomers and polymers. Independently, and in the same year, associate formation during anionic styrene polymerization was described by Worsfold and Bywater... [Pg.421]

The serum creatinine concentration is dependent on the input function, or formation rate, and output function, or elimination rate. Its formation rate depends on the zero-order production from creatine metabolism, as well as input from other sources such as dietary intake. Creatine metabolism is directly proportional to muscle mass therefore individuals with more muscle mass have a higher serum creatinine concentration at any given degree of kidney function than those with less muscle mass. Exercise is associated with an increase of approximately 10% in the serum creatinine concentration. As the result of minimal muscle mass patients who are cachectic will have very low serum creatinine concentrations, as do those with spinal cord injuries. " Elderly patients and those with poor nutrition may also have low serum creatinine concentrations (<1 mg/dL) secondary to decreased muscle mass. Other factors that influence the serum creatinine concentration include the dietary intake of creatine. During the cooking of meat, some creatine is converted to creatinine, which is rapidly absorbed following ingestion. [Pg.767]


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