Criteria for selection

Criterion Dickson (1966) Ranking Rating Weber et al. (1991) Ranking (%) Zhang et al. (2003) Ranking (%) 

Ranking is based on the frequency that the criterion is discussed in reviewed papers. 

A+ Extremely important A considerably important B averagely important C slightly important. 

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The main criteria for selecting a stationary phase are that it should be chemically inert, thermally stable, of low volatility, and of an appropriate polarity for the solutes being separated. Although hundreds of stationary phases have been developed, many of which are commercially available, the majority of GLC separations are accomplished with perhaps five to ten common stationary phases. Several of... 

Personal computers have introduced new ways to handle pdvate biblographic and text files. The most important factors to consider to achieve satisfactory results in building a bibhographic or text database are the type of information to be stored and the needs of the user. Types of information include correspondence, research results and documentation, meeting notes, and bibliographic references. Needs of the user to be considered should include the potential number of users of the database, restrictions for the access and display of the information because of privacy or proprietary reasons, and the retrieval mechanisms (eg, by keyword, authority list, controUed vocabulary, author, tide, date, or other document or information attributes). In addition, criteria for selecting and encoding information for the database need to be established. 

The criteria for selection of laboratory reactors include equipment cost, ease of operation, ease of data analysis, accuracy, versatility, temperature uniformity, and controllabihty, suitability for mixed phases, and scale-up feasibility. 

The procedure given in Fig. 30-15 leaves much to analysts. Criteria for selecting the number ana location of measurements for a particular piece of equipment or unit have not been established in the literature. Therefore, there is heavy reliance on examining alternative models at the bottom of the procedure. The creativity of analysts to develop alternative explanations for performance or hypotheses explaining why the present model might be wrong is a particularly important skill. 

Depending upon why a company chose to let a toll, the ability to scale up production may be an important factor. If a toll project was designed to meet a specific, short-term need for a known quantity of material, scale-up capability may not be an issue. However if the goal was to develop a wider market and eventually increase production, a small toller that meets all other criteria for selection could be excluded based upon this factor. Planning for success is essential. 

Criteria for Selection of Pressure and Temperature Sensors for Compressor Efficiency Measurements... 

Plastic venturis should be avoided wherever there is the potential for isolation of the bag cage or other conductive component. Plastic venturi hazards are noted in [33] a recent dust explosion originating in a bag house might have been due to their use. Criteria for selection of antistatic and conductive filter cloths are given in 6-5.2.1. 

This section describes the various pressure relief devices that are commonly used, with their characteristics and criteria for selection. Basic calculation procedures for sizing PR valves are covered in subsequent discussions. 

This chapter covers the design of facilities to handle equipment drainage and contaminated aqueous effluents that are sent for appropriate disposal blowdown drum systems to receive closed safety valve discharges, emergency vapor blowdowns, etc. and facilities for process stream diversion and slop storage. Also covered are criteria for selecting the appropriate method of disposal. Design of flares is covered in a subsequent chapter. 

This chapter discusses some of the criteria for selecting, designing and spacing elevated, burning-pit, and multijet flares. The design of safety valve and flare headers was covered in an earlier chapter, as well as discussions concerning associated blowdown drums, water disengaging drums, etc. 

Brown, C.W., Lynch, P.F., Obremski, R.J., Lavery, D.S., "Matrix Representations and Criteria for Selecting Analytical Wavelengths for Multicomponent Spectroscopic Analysis", Anal. Chem. 1982 (54) 1472-1479. 

Selected additional reactions, transformations, or rearrangements of three-membered ring sulfones and sulfoxides will follow. The criteria for selection is the direct or indirect involvement of the functional groups in the reaction. 

Appendix 1 contains a number of references and links to chemical lists and resources to help identify chemicals of concern. In addition, it maybe useful to review the criteria used to classify substances via EU s Dangerous Substance Directive (67/548/EEC), Environment Canada s Ecological Categorization of Substances on the Domestic Substances List, or Health Canada s Categorization of Substances on the Domestic Substances List when establishing your organization s criteria for selecting chemicals of concern. 

Recommended criteria for selection of aquatic biological indicators for monitoring and assessment of methylmercury (MeHg), 0... 

TABLE 4.1 (continued) Recommended criteria for selection of aquatic biological indicators for monitoring and assessment of methylmercury (MeHg), and their application to candidate biological indicators Extent to which the aquatic biological indicator satisfies the criterion ... 

Overall Criteria for Selecting Monitoring Sites, Global and... 

Included in this table are criteria related to kinase inhibition, including detailed analyses of reversibility, detergent effects, and competition with ATP. Also listed are criteria for selectivity, cellular activity, and the physicochemical and in vitro ADME profiles. The final two criteria require the lead to be part of a series of compounds with demonstrated SAR. 

The most important criteria for selection of breeding plants are quality, yield, and resistance to cold, drought, and the various pests of the area. Seed tea plants have a long economic life and there are known instances of plants over 100 years old. 

Pharmaceutical packaging is the means of providing protection, presentation, identification and information, containment, and convenience to encourage compliance with a course of therapy. The period from product manufacture to ultimate use or administration lies within the product shelf life interval. Criteria for selecting a satisfactory packaging system for pharmaceutical products are established by addressing a checklist of basic considerations ... 

The theoretical study of complexes [IrLCl], [cpIrCl]1, and [IrChfPIfvh]1, where L is a tridentate chelating ligand, has resulted in the establishment of criteria for selecting tridentate chelating ligands for the stabilization of hydridoalkyl complexes [(Me)Ir(L)(H)Cl].550... 

Kwauk, M., and Tai, D. -W., Transport Processes in Dilute-Phase Fluidization as Applied to Chemical Metallurgy, (I). Transport Coefficient and System Pressure Drop as Criteria for Selecting Dilute-Phase Operations (II). Application of Dilute-Phase Technique to Heat Transfer, (in Chinese, with Eng. abs.), Acta Metallurgica Sinica, 7 264—280 391—408 (1964)... 

The virial methods differ conceptually from other techniques in that they take little or no explicit account of the distribution of species in solution. In their simplest form, the equations recognize only free ions, as though each salt has fully dissociated in solution. The molality m/ of the Na+ ion, then, is taken to be the analytical concentration of sodium. All of the calcium in solution is represented by Ca++, the chlorine by Cl-, the sulfate by SO4-, and so on. In many chemical systems, however, it is desirable to include some complex species in the virial formulation. Species that protonate and deprotonate with pH, such as those in the series COg -HCOJ-C02(aq) and A1+++-A10H++-A1(0H), typically need to be included, and incorporating strong ion pairs such as CaSO aq) may improve the model s accuracy at high temperatures. Weare (1987, pp. 148-153) discusses the criteria for selecting complex species to include in a virial formulation. 

Criteria for selection of names for inclusion are inevitably subjective, but the intention has been to include all named processes in current commercial use anywhere in the world, and those which have been or are being piloted on a substantial scale. Obsolete processes which have been or might have been important in the past are included too. The coverage is primarily of English names but some foreign names are included. 

Some information (e.g. reproductive state) appears to be contained solely within the chemical matrix of certain marks, particularly within the stable genital secretions. Thus, longer-lasting signals may be broadcast to any animal that comes in contact with labial or scrotal marks. Such a scenario seems particularly applicable to females that scent mark most frequently prior to the onset of estrus cycles, but nonetheless when their sex steroids are on the rise (Drea 2007). Such advertisement may encourage male immigration at a time that would maximize the opportunity of female mate choice, even if the mechanism of, or criteria for, selection remain obscure. 

The ideal species for carcinogenicity bioassays should absorb, metabolize, and excrete the compound under study exactly as humans do. Unfortunately, because of the small number of species that meet the other criteria for selection, there is limited practical utility to this important scientific concept, as applied to carcinogenicity studies. 

Since that time an enormous number of surfactants covering a wide range of chemical and physicochemical properties have been developed for quite universal as well as specific tasks in domestic and industrial applications. The criteria for selection of a surfactant for industrial production is directly connected with the feasibility of large-scale production. This is determined by several factors including availability and costs of raw materials, cost of manufacture, and performance of the finished products. In addition to these aspects, environmental considerations likewise play an increasingly important role. 

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