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Demand type regulators

Demand type regulators are adequate in oxygen-deficient atmospheres however, in hazardous atmospheres inunediately dangerous to life or health, the manufacturers... [Pg.99]

The strict regulations of the pharmaceutical industry have a significant effect on the quality control of final products, demanding the use of reliable and fast analytical methods. The capacity that the technique has for the simultaneous determination of several APIs with no need of, or with minimum, sample preparation has considerably increased its application in pharmaceutical analytical control. The main limitation of NIR is the relatively low sensitivity that limits the determination of APIs in preparations when their concentration is less than 0.1%. Nevertheless, instrumental improvements allow the determination below this limit depending on the nature of the analyte and the matrix, with comparable errors to the ones obtained with other instrumental techniques. The reference list presents an ample variety of analytical methodologies, types of samples, nature of analyte and calibration models. A detailed treatment of each one is beyond the scope of... [Pg.483]

A catalytic cycle is composed of a series of elementary processes involving either ionic or nonionic intermediates. Formation of covalently bound species in the reaction with surface atoms may be a demanding process. In contrast to this, the formation of ionic species on the surface is a facile process. In fact, the isomerization reaction, the hydrogenation reaction, and the H2-D2 equilibration reaction via ionic intermediates such as alkyl cation, alkylallyl anion, and (H2D)+ or (HD2)+ are structure-nonrequirement type reactions, while these reactions via covalently bound intermediates are catalyzed by specific sites that fulfill the prerequisites for the formation of covalently bound species. Accordingly, the reactions via ionic intermediates are controlled by the thermodynamic activity of the protons on the surface and the proton affinity of the reactant molecules. On the other hand, the reactions via covalently bound intermediates are regulated by the structures of active sites. [Pg.156]


See other pages where Demand type regulators is mentioned: [Pg.121]    [Pg.270]    [Pg.99]    [Pg.168]    [Pg.74]    [Pg.122]    [Pg.363]    [Pg.382]    [Pg.2209]    [Pg.592]    [Pg.409]    [Pg.199]    [Pg.820]    [Pg.720]    [Pg.499]    [Pg.422]    [Pg.38]    [Pg.40]    [Pg.140]    [Pg.330]    [Pg.193]    [Pg.154]    [Pg.509]    [Pg.92]    [Pg.44]    [Pg.4]    [Pg.66]    [Pg.121]    [Pg.183]    [Pg.184]    [Pg.13]    [Pg.27]    [Pg.406]    [Pg.62]    [Pg.98]    [Pg.137]    [Pg.74]    [Pg.122]    [Pg.184]    [Pg.136]    [Pg.100]    [Pg.92]    [Pg.10]    [Pg.66]    [Pg.165]   
See also in sourсe #XX -- [ Pg.99 ]




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