molecular volume


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molecular volume

[mə′lek·yə·lər ′väl·yəm]
(chemistry)
The volume that is occupied by 1 mole (gram-molecular weight) of an element or compound; equals the molecular weight divided by the density.
References in periodicals archive ?
[V.sub.M] = liquid molecular volume of the sorbate, [cm.sup.3]/mol
Calculation of molecular volume, [DELTA]G, [DELTA]H, and [DELTA]S for polyalanine with 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, and 50 residues (called a 2-50 sequence from here forward) resulting in the linear type structure.
Nonassociative polymer -- Alkali-swellable emulsion (ASE) or HEC of comparable molecular volume to the HASE.
The maximal effective molecular volume of Xenopus vit A2 and human pS2 EREs varies with the ER-phytoestrogen complex present.
For example, if you do no molecular testing and your current average send-out test costs $75 (approximate $345,000 yearly) with a volume of 4,600 tests--and if molecular volume is replacing your send-outs with an average test cost of $225, you can project your yearly send-outs rising to approximately 5693,000 if half of them are converted to molecular-based testing over the next three years.
Diffusion coefficient decreased with increasing molecular volume of their migrating liquids.
The molecular segments for cis and trans polybutadiene have a molecular volume of roughly 9-10 cc/mole, which is a little less than a CH group.
For an isothermal process, it is d[mu] = [V.sub.g]dP where [V.sub.g] is the molecular volume of dissolved gas in solution.
These are affected by the affinity of the penetrating molecule to the polymer, molecular volume (size and shape of the penetrating molecule), temperature and other factors that affect polymeric segmental mobffity (21-23).
The existence of a continuous, monotonic dependence of glassy state diffusivity on the van der Waals molecular volume of penetrants was first demonstrated for data on PVC (7): Diffusivities of gases and vapors, from helium to hexane, fell on a single semilogarithmic curve covering nearly ten orders of magnitude from [10.sup.-5] to [10.sup.-15] [cm.sup.2]/sec.
where n is the number of gas molecules inside the n-mer cluster and [v[prime].sub.g] is the effective molecular volume of a gas molecule in the solution.
We use the notation [v.sub.SDS], [v.sub.Na], and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] for the SDS (negative macroions only), sodium counterions and [D.sub.2]O molecular volumes, [N.sub.m]/V for the micelles number density, [b.sub.SDS], [b.sub.Na], and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] for the scattering lengths of the SDS, sodium and [D.sub.2]O molecules respectively.

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