Compressed gases characteristics

Compressed Ga.s PropeIIa.nts. The compressed gas propellants, so named because they are gaseous in conventional aerosol containers, are nontoxic, nonflammable, low in cost, and very inert. When used in aerosols, however, the pressure in the container drops as the contents are depleted. Although the problem is lessened when the contents are materials in which the propellant is somewhat soluble, this pressure drop may cause changes in the rate and characteristics of the aerosol spray. A compressed gas aerosol system is illustrated in Figure 3. 

Observable Characteristics-Piiyrica/S ote (as normally shipped) Compressed gas Color Colorless ... 

Observable Characteristics - Physical State (as normally shipped) Liquefied compressed gas Color Greenish yellow Odor Characteristic choking. 

Chemical Designations - Synonyms Allene-methylacetylene mixture MAPP gas Methylacetylene-allene mixture Propadiene-methylacetylene mixture Chemical Formula. CH3C=CH+CH2=C=CHj Ohservahle Characteristics - Physical State (as shipped) Liquefied compressed gas Color. Colorless Odor Offensive, like acetylene. 

Observable Characteristics-P/tysicn/S /nte (asshipped). Liquefied compressed gas Color Colorless Odor None slightly sweetish. 

Morini Gl, Lorenzini M, Salvigini S (2006) Friction characteristics of compressible gas flows in micro-tubes. Exp. Thermal and Fluid Science 30 733-744 Mudawar 1 (2001) Assessment of high-heat-flux thermal management schemes. IEEE CPT Trans 24 122-141... 

Colorless gas with a characteristic suffocating, irritating, and pungent odor detectable at 0.45-4.8 ppm. Shipped as a liquefied compressed gas. This material is hazardous through inhalation, and produces local skin/eye impacts. 

Dry-powder inhalers (DPIs) deliver the drug to the respiratory tract in aerosol form. An aerosol is by definition a suspension of free liquid or solid fine particles in a gas phase, which is air in the case of DPIs (and a compressed gas in the case of needle-free injection). The most prominent characteristic that determines the delivery of drug particles to the lungs is the particle size, although particle shape and density are also of considerable importance for the behavior of an aerosol in the respiratory tract (Brain and Blanchard 1993 Gonda 1992 Heyder et al. 1986 Agnew 1984 Heyder et al. 1980). 

The homogenization effect can be radically promoted by bubbling the melt with compressed gas. The characteristics of the resulting flow can be investigated conveniently on models (Safaieh, 1968 Pchelyakov, 1968). Bubbling is usually performed in container glass tanks. 

A polytropic reversible path A process in which changes in gas characteristics during compression are reviewed. 

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