molecular weight

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Related to molecular weights: Molar mass

molecular weight

n.
The sum of the atomic weights of all the atoms in a molecule. Also called relative molecular mass.

molecular weight

n
(Chemistry) the former name for relative molecular mass

molec′ular weight′


n.
the average weight of a molecule of an element or compound measured in units based on 1/12 the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule. Abbr.: mol. wt.
[1875–80]

molecular weight

The sum of the atomic weights of the atoms contained in a molecule. For example, since the atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16, the molecular weight of water (H2O) is 1 + 1 + 16, or 18.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.molecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a moleculemolecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
mass - the property of a body that causes it to have weight in a gravitational field
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
Translations
References in periodicals archive ?
Molecular weights of protein bands were compared with already reported allergens in allergen database (He, 2011).
Mutual diffusion behavior across PG-PES/BPA-PES interfaces and across ndPG-PES/ndBPA-PES interfaces was investigated in the case of different annealing temperatures or the use of polymers with different molecular weights. The relative concentration profile derived from BPA-PES ([[phi].sub.BPA]) was obtained using the following Eq.
The molecular weights were about 883 and 529, respectively, whereas plasma protein binding was greater than 99.5% and 61%-65%, respectively.
Higher molecular weights are associated with longer molecular chains, and this results in a greater level of entanglement.
Scientists at Louisiana State University used a novel cholesterol-linoleic acid emulsion model, which simulated the environment of human serum and a DPPH (1,1'-diphenyl-2-picrylhydrazyl) assay, to assess the antioxidant activities of chitosan samples of different molecular weights.
Thermal fractionation for the separation of the rubber polymer 1 Properties of the complete system simultaneous separation, characterization and fractionation of polymers, gels and particles in a measurementSeparation of the sample components to be analyzed in two dimensions wider (by molecular weight and chemical composition)Separation range of large and ultra-large cross-linked polymers having molecular weights of 103 Da to 109 DaFlow separation channel without stationary phase separation under mild conditions without shearing forces, filters and adsorption, which would lead to a change in the molecular weight distribution of the sample.
Calibration curves are used to translate retention volumes into molecular weights and enable the generation of a molecular weight distribution from this concentration data.
The weight-average (M,) and number-average (M,,) molecular weights and polydispersity ([M.sub.w]/[M.sub.n]) of the samples were measured and their values are given in Table 3.
LALS light scattering technology is said to be the only GPC detection method that provides absolute molecular weights with extrapolation or correction.
The Low Angle Light Scattering (LALS) detector operates at an angle of 7 degrees and provides molecular weights without extrapolation or correction.
Accordingly, a mixture of polymer molecules with a range of molecular weights results during synthesis.
Hydrobrite Plastics Oils low-volatility white mineral oils in a wide range viscosities and molecular weights. Products custom tailored by removing the lower boiling range molecules, thereby making them less volatile.

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