molecular weight


  • WordNet 3.6
    • n molecular weight (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
    • ***
Webster's Revised Unabridged Dictionary
    • Molecular weight (Chem) the weight of a molecule of any gas or vapor as compared with the hydrogen atom having weight of 1 as a standard; the sum of the atomic weights of the constituents of a molecule; thus, the molecular weight of water (H2O) is 18. For more precise measurements, the weight of the carbon isotope carbon-12 is used as the standard, that isotope having the value of 12.000. In this systen, now used almost universally, the hydrogen atom has a weight of 1.0079.
    • ***


In literature:

Is the molecular weight not in every instance = two volumes?
"Scientific American Supplement, No. 286" by Various
Hence it was imperative to determine without doubt the molecular weight of some two typical isomers.
"Scientific American Supplement, No. 643, April 28, 1888" by Various
From the molecular weight calculate the weight of 1 l. of each of these gases.
"An Elementary Study of Chemistry" by William McPherson
Arcot donned his, and adjusted his weight to ten pounds with the molecular power unit.
"Islands of Space" by John W Campbell
"Researches on Cellulose" by C. F. Cross
We now proceed to discuss molecular heats of compounds, that is, the product of the molecular weight into the specific heat.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1" by Various
It is a solid, very dense in molecular structure despite its lack of weight, of great strength and considerable elasticity.
"Armageddon--2419 A.D." by Philip Francis Nowlan
The molecular weight of mercurous chloride has given occasion for much discussion.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1" by Various
The associated groups are mostly of the normal saturated series, and of very high molecular weight.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5" by Various
Thus Bouchard has been able to determine by means of cryoscopy the mean molecular weight of the substances eliminated by the urine.
"The Mechanism of Life" by Stéphane Leduc

In news:

Low-molecular-weight heparins and platelet glycoprotein IIb/IIIa inhibitors have shown the potential to improve pharmacological reperfusion therapy.
If melt flow rate tests are used to evaluate the effect of processing on the average molecular weight of the polymer, the applicable rules must consider the contribution of the filler to the test result.
Researchers investigate the application of dual-polarization interferometry (DPI) as a method for the real-time characterization of low molecular weight ligands.
Molecular Weight of Compound vs Polymer.
MALDI-TOF MS Analysis of Nanotrap® Enriched Low Molecular Weight Proteins from Human Serum DESCRIPTION Biomarkers are often masked by high abundant proteins or may be susceptible to proteolysis.
Reliably detecting low amounts of high molecular weight impurities during process development and characterization of biopharmaceutical products.
Applications to Organic Molecules of Moderate Molecular Weight.
New Techniques & Application Chapter 11 TLC-FID with Special Reference to Marine Lipids and Other High-Molecular-Weight Organic Compounds .
The Prominence GPC is designed specifically to deliver reliable analytical data in measuring the distribution of molecular weights.
Reliably detecting low amounts of high molecular weight impurities during process development and characterization of biopharmaceutical products.
When spark discharges crack oil molecules, hydrogen gas and low molecular weight hydrocarbon gas will be produced.
Modifying the fuel will require a modification to the pilot flare also LPG consists mainly of propane and butane and has a different molecular weight than natural gas which is mainly methane with a little bit of ethane.
Is a low- molecular -weight heparin program right for your pharmacy.
In order to achieve peak performance, Pelican 's kayaks are made using state of the art Twin Sheet Thermoforming (TST) and Pelican 's exclusive RAM-X™ material, a high molecular weight polyethylene.
While there is a blurry line between the molecular weight different of polymers and oligimers, polymers are normally defined as molecules that have a molecular weight over 5,000 g/mol.

In science:

As a consequence, the molecular weight should decrease and the sound speed should increase in this region.
Helioseismology and solar neutrinos: an update
If the weight of the molecular complex is a significant component to the equilibrium of clumps, then the required pressure should vary with location of the clump within the gravitational potential.
The Equilibrium State of Molecular Regions in the Outer Galaxy
In the outer Galaxy, the surface density of atomic gas is much larger than that of the molecular material and therefore, provides an additional component to the weight upon a given clump or isolated cloud.
The Equilibrium State of Molecular Regions in the Outer Galaxy
Therefore, it is plausible that the weight of the HI layer of gas or magnetic fields provide the external pressure to maintain equilibrium of the low mass molecular regions in the outer Galaxy.
The Equilibrium State of Molecular Regions in the Outer Galaxy
Q = T V −1 (∂ V /∂ T )P = 1 − (∂ ln µ/∂ ln T )P is the variable average molecular weight.
New grids of ATLAS9 atmospheres I: Influence of convection treatments on model structure and on observable quantities