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molecular mass

Also known as molecular weight

sum of atomic masses of all atoms in a molecule

AI overview

Molecular mass is the total weight you get when you add up the masses of all the individual atoms that make up a molecule. It matters because knowing a molecule's mass helps scientists identify substances, predict how they'll behave in chemical reactions, and determine the right amounts to use in experiments or manufacturing.

AI-generated from the Wikipedia summary — may contain errors.

Research

588,622 papers

Determination of Protein Molecular Weights on SDS-PAGE.Methods in molecular biology (Clifton, N.J.) · 2019Matsumoto H, Haniu H, Komori NDOI: 10.1007/978-1-4939-8793-1_10
Mass Spectrometry Imaging of Low-Molecular-Weight Phenols Liberated from Plastics.Analytical chemistry · 2021Xu Q, Tian R, Lu CDOI: 10.1021/acs.analchem.1c03397
Mass measurement at high molecular weight--new tools for biotechnologists.ReviewTrends in biotechnology · 1992Geisow MJDOI: 10.1016/0167-7799(92)90293-5
Quantification of low molecular weight compounds by MALDI imaging mass spectrometry - A tutorial review.ReviewBiochimica et biophysica acta. Proteins and proteomics · 2017Rzagalinski I, Volmer DADOI: 10.1016/j.bbapap.2016.12.011
Mass spectrometry profiling of low molecular weight proteins and peptides isolated by acetone precipitation.Analytica chimica acta · 2020Baghalabadi V, Doucette AADOI: 10.1016/j.aca.2020.08.057
The molecular mass and isoelectric point of plant proteomes.BMC genomics · 2019Mohanta TK, Khan A, Hashem A et al.DOI: 10.1186/s12864-019-5983-8
Methods for Hyaluronan Molecular Mass Determination by Agarose Gel Electrophoresis.Methods in molecular biology (Clifton, N.J.) · 2019Cowman MKDOI: 10.1007/978-1-4939-9133-4_8
Top-down mass spectrometry for characterizing the low molecular weight proteome of canine osteosarcoma cell phenotypes.European journal of mass spectrometry (Chichester, England) · 2023Yang L, Stanisheuski S, Song Z et al.DOI: 10.1177/14690667231202766

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Encyclopedic overview

The molecular mass (m) is the mass of a given molecule, often expressed in units of daltons (Da). Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element. The derived quantity relative molecular mass is the unitless ratio of the mass of a molecule to the atomic mass constant (which is equal to one dalton).

The molecular mass and relative molecular mass are distinct from but related to the molar mass. The molar mass is defined as the mass of a given substance divided by the amount of the substance, and is expressed in grams per mole (g/mol). That makes the molar mass an average of many particles or molecules (weighted by abundance of the isotopes), and the molecular mass the mass of one specific particle or molecule. The molar mass is usually the more appropriate quantity when dealing with macroscopic (weigh-able) quantities of a substance.

Excerpted from Wikipedia’s “molecular mass” article, available under the CC BY-SA 4.0 licence.

molecular mass

Research

Encyclopedic overview

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