INDEX primary

Publications of this kind are described as non-original. They are abstracting services and handbooks that catch the primary literature, condense the important contents, and make this information available (searchable). Secondary literature is not evaluated and is provided in both printable and electronic forms. Examples are Gmelin, Beilstein, Citations Chemisches Zentralblatt, Chemical Abstracts, or Science Citation Index handbooks include Houben-Weyl, and Landolt Bomstein. 

The dielectric constant is a measure of the ease with which charged species in a material can be displaced to form dipoles. There are four primary mechanisms of polarization in glasses (13) electronic, atomic, orientational, and interfacial polarization. Electronic polarization arises from the displacement of electron clouds and is important at optical (ultraviolet) frequencies. At optical frequencies, the dielectric constant of a glass is related to the refractive index k =. Atomic polarization occurs at infrared frequencies and involves the displacement of positive and negative ions. 

If the substitute fuel is of the same general type, eg, propane for methane, the problem reduces to control of the primary equivalence ratio. For nonaspiring burners, ie, those in which the air and fuel suppHes are essentially independent, it is further reduced to control of the fuel dow, since the air dow usually constitutes most of the mass dow and this is fixed. For a given fuel supply pressure and fixed dow resistance of the feed system, the volume dow rate of the fuel is inversely proportional to. ypJ. The same total heat input rate or enthalpy dow to the dame simply requires satisfactory reproduction of the product of the lower heating value of the fuel and its dow rate, so that WI = l- / remains the same. WI is the Wobbe Index of the fuel gas, and... 

Index entries are divided into two categories, primary and secondary. Primary index entries are used when a significant part of the text is devoted to a particular ring system this may be a whole chapter, or a section or subsection. Secondary index entries are used when a heterocyclic system is mentioned in a chapter devoted to another (primary) system. This may be, for example, as a starting material or as a product, or in a discussion comparing properties. 

NR = No index values reported at concentration levels below those specified by "alert level" criteria (Table 5-1). Annual primary National Ambient Air Quality Standard. 

Refs 1) Anon, Storage and Outloading Primary Index , TM 743-200-1 (July 1970)... 

GLANCE INDEX TO TYPICAL QUINOXALINE DERIVATIVES AVAILABLE BY PRIMARY SYNTHESES... 

Sufficient stability of the hydrocarbon ions, as the salt or in the solution, is an obvious prerequisite for these procedures, and, in practice, selecting or designing the stable ions and choosing a proper solvent are tasks of primary importance. As an ordinary stability index for the ions, thermodynamic scales referred to the water molecule, i.e. p CR+ and pKa values, are chosen for the carbocation and carbanion, respectively. 

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