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Effective generalized

General first-order kinetics also play an important role for the so-called local eigenvalue analysis of more complicated reaction mechanisms, which are usually described by nonlinear systems of differential equations. Linearization leads to effective general first-order kinetics whose analysis reveals infomiation on the time scales of chemical reactions, species in steady states (quasi-stationarity), or partial equilibria (quasi-equilibrium) [M, and ]. [Pg.791]

Assuming the validity of the Bom approximation, an effective generalized oscillator strength can be derived in temis of experimentally accessible quantities ... [Pg.1317]

Decrease hinder viscosity. Lower hinder concentration. Change hinder. Decrease any diluents and polymers which act as thickeners. Raise temperature for processes without simultaneous drying. Lower temperature for processes with simultaneous drying since hinder concentration will decrease due to increased hqiiid loading. This effect generally offsets inverse relationship between viscosity and temperature. [Pg.1881]

The paint is then cured in an oven. The curing time will depend upon the thickness of coat, shape of the workpiece and type of oven and its effectiveness. Generally, a coat of up to 60-70 microns at a stoving temperature of 180-200 C (depending upon the type of powder) should take around 10-12 minutes to cure. Contact the manufacturers for exact details. [Pg.410]

Because the key operation in studying solvent effects on rates is to vary the solvent, evidently the nature of the solvation shell will vary as the solvent is changed. A distinction is often made between general and specific solvent effects, general effects being associated (by hypothesis) with some appropriate physical property such as dielectric constant, and specific effects with particular solute-solvent interactions in the solvation shell. In this context the idea of preferential solvation (or selective solvation) is often invoked. If a reaction is studied in a mixed solvent. [Pg.403]

T.W. Clarkson, Effects - General Principles Underlying die To. ic Action of Metals, Handbook on the To.xicology of Metals, L. Friberg, G.F. Nordberg, and V.B. Vouk, eds. 2 ed., Elsevier, Amsterdam, Holland, 1986. [Pg.314]

The moisture sensibility is remarkable, certain natural fibers can easily be influenced by environmental effects. Generally speaking, the mechanical properties are lowered with rising moisture content. [Pg.808]

Pressures above 1 to 2 psia have small effects on HETP for random and structured packing. For high vacuum the data are not totally firm as to the consistency of effects, generally HETP increases (efficienq becomes lower). At high pressure above 200-300 psia structured packing HETP increases (lower efficiency) [90]. [Pg.375]

Generally, oxepins have a tendency to contract to a six-membered carbocycle when treated with acid. The driving force is the aromaticity of the phenol formed. However, when the less stable cyclohexa-2,5-diene-1,4-diol with an appropriate substitution pattern is treated with acid, the oxepin system is obtained. The treatment of cyclohexadienediols that are substituted with tert-butyl groups in the 2- and 6-positions and aryl at Cl and C4 with trifluoroacetic acid produces oxepins 1 with elimination of water.186 187 This reaction, however, is restricted to certain aryl substituents with at least some electron-donating effect. Generally, cyclohexa-2,4-dienone derivatives 2 are formed.187,188... [Pg.31]

Which monitoring approach is more effective Generally speaking, an active approach allows more systematic and thorough monitoring of advertisements and promotion activities. In practice, its effectiveness depends on how it is done, and what happens after a violation has been identified. If active monitoring is carried out only sporadically, with minimal in-depth examination of dmg advertisements and promotion, it is unlikely to be effective. If there are no sanctions, or only small fines are imposed when a violation is discovered, then the deterrent effect is minimal. For example, a pharmaceutical... [Pg.100]

In addition to instrument spreading, which is generally treated as being Gaussian in nature (15, 16), skewing can also be observed in SEC of latices because of entrapment of particles within the porous matrix. This effect generally increases with increasing particle size. [Pg.28]

Target serum theophylline concentrations are 5 to 15 mg/L (28 to 83 fimol/L). Adverse effects generally are not problematic at serum concentrations below 15 mg/L (83 ftmol/L), but the increased risk of adverse effects outweighs the increase in bronchodilation in most patients above 15 mg/L (83 fimol/L).36 Headache, nausea, vomiting, and irritability may occur at serum concentrations less than 20 mg/L (110 fimol/L) but are rare when the dose is started low and increased slowly. More serious adverse effects, including cardiac arrhythmias, seizures, toxic encephalopathy, and death can occur at higher concentrations.18 Arrhythmias and seizures may occur without nausea and vomiting, particularly in chronic toxicity. [Pg.223]


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See also in sourсe #XX -- [ Pg.316 ]




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