Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Petite definition

The variation of specific heat with temperature was discovered by Dulong and Petit in 1819. It explains why so many different heat units exist (cf. 5), and requires the definition of specific heat to be so framed as to allow for this variation. For this purpose we replace the finite changes by infinitesimal ones. If SQ units of heat are absorbed when unit mass of a substance is raised in temperature from 6— SO) to 0- - SO) underspecified conditions, the true specific heat at the temperature 0 is ... [Pg.8]

Fisher polynomials can be used only within the T range for which they were created. Extrapolation beyond the T limits of validity normally implies substantial error progression in high-F entropy and enthalpy calculations. For instance, figure 3.4 compares Maier-Kelley, Haas-Fisher, and Berman-Brown polynomials for low albite. As can be seen, the first two interpolants, if extended to high T, definitely exceed the Dulong and Petit limit. The Berman-Brown interpolant also passes this limit, but the bias is less dramatic. [Pg.135]

Schweitz was the first to recognize that the definition of pressure is a problem in the physics of an open system. He argued that the classical result based on the properties of a closed, isolated system - a petit ensemble - must be recast in terms of an open system, a system with permeable walls, replacing the petit ensemble with the grand ensemble. This he did for both a classical... [Pg.290]

Chemical manufacturers, like ourselves, who have had many years of experience in developing new drugs for human and animal use have a definite advantage in this field, because the type of information necessary to support a food additive petition is similar to that needed to obtain an effective new drug application. [Pg.144]

A hazardous material is a material listed by DOT in the Hazardous Materials Table ( 172.101) by technical name, or, if not listed by technical name, a material that meets the specific criteria of a hazard class. A plus sign (+) on Column I of the Hazardous Materials Table fixes the hazard class and proper shipping name for that material without regard as to whether that material meets the definition of that hazard class. If petitioned, an alternate hazard class, in that case, may be authorized by the Associate Director, Office of Hazardous Materials Regulation, MTB ( 172.101(b)(l)). If a material listed by technical name on the Hazardous Materials Table meets the definition of a hazard class other than the class shown in association with the technical name, the material must be classified in accordance with the appropriate hazard class. It must then be described by the shipping name that best describes the material listed in association with the correct hazard classification. If the... [Pg.90]

The definitions are in 40 C.ER. 745.223. In October 2009 the EPA said that it intends to lower the concentration of lead necessary for a determination that paint is lead-based paint. See http //www.epa.gov/oppt/chemtest/pubs/petitions.html. [Pg.643]

Even if we agree that there is a iimit to the divisibiiity of matter, nothing compels us to identify this limit of divisibility with the atoms of chemists and we could very well understand the cause of the law of definite [i.e., multiple] proportions by the supposition that chemical atoms are nothing but molecular compounds composed of a certain number of smaller atoms [petits atomes].. .. Is this hypothesis not in perfect harmony with the atomic theory is it not confirmed by experience [experience] ... [Pg.81]

Level 1 Provides a broad definition of the plan, source, make, delivery, and return process t5q>es, and is the point at whieh a eompany establishes its supply ehain eom-petitive objectives. [Pg.5]

This subpart explains the purpose and scope, definitions, petitions, amendments, and applicability of all the standards in 29 CFR 1910. Standards will be adopted as necessary by the Secretary to make a healthier and safer workplace. It explains each individual s role from the Secretary of Labortothatofthe employee, as well as otherterms used throughout 29 CFR 1910. Any interested person may petition in writing to the Assistant Secretary of Laborforthe issuance, amendment, or repeal of a standard. It places the Assistant of the Secretary of Labor at the same level of authority as the Secretary of Labor. It lists all the territories that the standards apply to but excludes governmental agencies. [Pg.405]

Infant formulas are regulated as food. If a manufacturer wishes to add a new ingredient to an infant formula, it must follow one of three routes it may determine a substance is GRAS without formally notifying FDA, it may file a GRAS Notification with FDA, or it may file a Food Additive Petition (see Box 4-1 for the definition of a food additive) with FDA. The GRAS Notification and the Food Additive Petition processes are described below. [Pg.58]

This subpart explains the purpose and scope, definitions, petitions for issuance, amendment, and repel of a standard in 29 CFR 1910. The purpose of these standards is to make the workplace safer and healthier. It explains the applicability of the OSHA standards relevant to the workplaces covered, the geographic location covered, and specific entities (i.e.. Federal agencies) not covered. It also lists regulations that have been incorporated in this standard by reference into 29 CFR 1910 as well as the requirements for nationally recognized testing laboratories. [Pg.457]

In conclusion, it must be emphasized that the induction of the RD or petite phenotype (petite colony phenotype due to slower growth) can be brought about by mutagens as well as by definitely nonmutagenic regimens and, moreover, that induction of this alteration is possible in only a few yeast species. Consequently, results obtained using this mutation system cannot be considered as of general relevance. [Pg.228]


See other pages where Petite definition is mentioned: [Pg.458]    [Pg.97]    [Pg.27]    [Pg.458]    [Pg.441]    [Pg.227]    [Pg.1299]    [Pg.220]    [Pg.88]    [Pg.84]    [Pg.159]    [Pg.291]    [Pg.291]    [Pg.314]    [Pg.115]    [Pg.262]    [Pg.146]    [Pg.276]    [Pg.545]    [Pg.716]    [Pg.7]    [Pg.312]    [Pg.34]    [Pg.98]    [Pg.254]    [Pg.134]    [Pg.146]    [Pg.112]    [Pg.701]    [Pg.8]   
See also in sourсe #XX -- [ Pg.21 ]




SEARCH



Petit

Petites

Petition

© 2024 chempedia.info