Vacuum symbols

Table 8-2 lists several physical properties pertinent to our concern with the effects of solvents on rates for 40 common solvents. The dielectric constant e is a measure of the ability of the solvent to separate charges it is defined as the ratio of the electric permittivity of the solvent to the permittivity of the vacuum. (Because physicists use the symbol e for permittivity, some authors use D for dielectric constant.) Evidently e is dimensionless. The dielectric constant is the property most often associated with the polarity of a solvent in Table 8-2 the solvents are listed in order of increasing dielectric constant, and it is evident that, with a few exceptions, this ranking accords fairly well with chemical intuition. The dielectric constant is a bulk property. 

Lines in vacuum service, 135—141 Line symbols, 17, 23 Numbering, 23 Lined centrifugal pumps, 171 Liquid-solid particle, separators, 228 Baffle type specifications, 248 Baffle type, 247, 248 Centrifugal, 256, 259-261 Chcvron-vanc, 248, 235 Comparison chart, 230 Cyclone, 259 Specification form, 268 Vane, 259 Wire mesh, 246 York-vane, 248 Low pressure storage... 

February, and beef is sold de-boned and vacuum packed and cut to the customer s specifications, all certified and labelled with the Organic Trust symbol. 

Figure 3. Plot of [U] vs. dose in the irradiation of various polyethylenes in the presence of CTFE (symbols are the same as in Figure 1) and in vacuum (--------)...

Todd, J.F.J. Recommendations for Nomenclature and Symbolism for Mass Spectroscopy Including an Appendix of Terms Used in Vacuum Technology. Int. J. Mass Spectrom. Ion Proc. 1995, 142, 211-240. 

All types of electromagnetic radiation travel at the same velocity in a vacuum. The velocity is 3-00 x lO m s. This value is given the symbol, c, and it is assumed to be the constant velocity of electromagnetic radiation anywhere. 

An atomic unit of length used in quantum mechanical calculations of electronic wavefunctions. It is symbolized by o and is equivalent to the Bohr radius, the radius of the smallest orbit of the least energetic electron in a Bohr hydrogen atom. The bohr is equal to where a is the fine-structure constant, n is the ratio of the circumference of a circle to its diameter, and is the Rydberg constant. The parameter a includes h, as well as the electron s rest mass and elementary charge, and the permittivity of a vacuum. One bohr equals 5.29177249 x 10 meter (or, about 0.529 angstroms). 

The fifth letter in the Greek alphabet hence, used to denote the fifth in a series (for example, the fifth methylene carbon in a fatty acid). 2. Symbol for molar absorption coefficient or extinction coefficient. 3. Symbol for permittivity (cq refers to permittivity of a vacuum refers to relative permittivity). 4. s, Symbol for degree of activation (lUB (1982) Eur. J. Biochem. 128, 281). 5. 8i, Symbol for degree of inhibition. 6. Symbol for efficiency. 7. Symbol for linear strain. 8. Symbol for emit-tance. 

I. Symbol for micro-. 2. Symbol for micron. 3. Symbol for dynamic viscosity. 4. Symbol for magnetic or electric dipole moment of a molecule. 5. Symbol for chemical potential. 6. Symbol for permeability fio for permeabihty of vacuum /Xj for relative permeability. 7. Symbol for reduced mass. 

The symbols for vacuum pumps should always be arranged such that the side with the constriction is allocated to the higher pressure... 

Table XVI Symbols used in vacuum technology (extract tom DIN 28401)...

Alphabetical list of variables, symbols and units frequently used in vacuum technology and its applications (see also DIN 28 402)... 

We use the symbols c and Xo to refer, respectively, to the velocity and wavelength under vacuum only. In this chapter the symbol X, without a subscript, always refers to the wavelength of the radiation in the medium. 

The subscripts i which have been added refer to the different species of ion-dipoles, and the symbols ax(D),... indicate that the respective coefficients have to be calculated with the value of D and n2. From the way our work function A has been derived, it is evident that it contains the contributions which are caused by the presence of the solutes and by the change in dielectric constant of the solvent. The contributions which result from the first term in Equation 19 and which represent the work which is required to build up the ion-dipole in a standard environment (e.g., a vacuum) have disappeared from Equation 24 (being identical in A and A o). This self-energy of the particles is without interest for the present investigation and depends, of course, in a decisive way on the underlying model. 

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