Classifications physical form

Defoamer formulations currently contain numerous ingredients to meet the diverse requirements for which they are formulated. Various classification approaches are possible, including classification by application, physical form of the defoamer, and the chemical type of the defoamer. In general, defoamers contain a variety of active ingredients, both in solid and in liquid states, and a number of ancillary agents such as emulsifiers, spreading agents, thickeners, preservatives, carrier oils, compatibilizers, solvents, and water. 

Classification of dryers based on physical form of feed Wet Iced... 

NOTE 3 For classification tests on solid substances or mixtures, the tests should be performed on the substance or mixture as presented. If for example, for the purposes of supply or transport, the same chemical is to be presented in a physical form different from that which was tested and which is considered likely to materially alter its performance in a classification test, the substance or mixture must also be tested in the new form. 

Elaborate classification of dryers has been presented by Kroll (1978) and Keey (1972) but less comprehensive (but perhaps more practical) classifications are shown in Table 9.1. In this table, the method of operation, physical form of the stock, scale of production, special features, and drying time are presented. Two other classifications of dryers may be found in Perry (1999). One classifies the equipment on the basis of heat transfer (Figure 12-45) and the other on the basis of the material handled (Table 12-9) in Perry. 

Unfortunately, because the response to direct exposure to CW agents is typically very fast and violent, humans are excellent detectors for the presence of such substances in the immediate environment. It is certainly preferable to be able to detect the presence of CW agents through some other form of interaction. There are numerous other physical mechanisms that can be exploited to produce robust detection, classification, and identification signatures. Although CW agents can appear in many different physical forms—vapors, solids, or liquids, with or without inert co-components—such chemical substances typically have distinctive mass, chemical, and electromagnetic (EM) properties that can be measured. 

Classification of Yeasts.—Although the structure of yeasts is so exceedingly simple that it seems difficult for varieties to exist, nevertheless there are many different kinds or species. The distinctions are partly morphological, i.e., in the physical form of the cells, and partly chemical, i.e., in the enzymes elaborated by the cells which, of course, means that the products resulting from... 

Classification of Plastics, Elastomers, and Rubber (NFPA 231C) NOTE The following categories are based on unmodified plastic materials. The use of fire or flame-retarding modifiers or the physical form of the material may change the classification. 

There are a large number of adhesives on the market. It is helpful to organize these adhesives in groups with common characteristics to facilitate their understanding and use. Adhesives can be classified in a number of ways, although no one classification is universally recognized. Classifications include source, function, chemical composition, physical form, and application. 

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