James G.SpeightPhD, DSc, PhD, inHandbook of Industrial Hydrocarbon Processes (Second Edition), 2020 3Molecular weight Themolecular massof a substance is the mass of one molecule of that substance, in unifiedatomic mass units(Drews, 1998; Speight, 2015). This is distinct from therelative molecu...
The Atom block lists atom identities, atomic symbols, mass differences, charges, stereochemistry, and associated hydrogens, often treating hydrogens implicitly to reduce size. The Bond block details atom connectivity and bond types, including bond order. These core blocks form the basis of the ...
select article Speciation and determination of iron in aqueous solution and river water by high-resolution electrospray ionization mass spectrometry Research articleAbstract only Speciation and determination of iron in aqueous solution and river water by high-resolution electrospray ionization mass spectrometry...
The CO lines give the overall morphology of the gas, while the CS lines show where the dense gas lies. We have used an LVG excitation model to determine the physical conditions (column density, volume density, kinetic temperature, and mass) of the gas at each site of star formation. One...
Much effort has been invested in the investigation of the structural basis of G protein-coupled receptors (GPCRs) activation. Inverse agonists, which can inhibit GPCRs with constitutive activity, are considered useful therapeutic agents, but the molecular mechanism of such ligands remains insufficiently...
that of the truncated MetRS-like domain alone (Supplementary Fig.1a). Incubation of the PyrN (E56A) variant enzyme withl-Glu,2, ATP, and Mg2+afford a product (3) that displays the same mass signal (m/z292) but different retention time to that of1(Fig.3a). Moreover, the production...
PL10 homologs exist in a wide range of eukaryotes from yeast, plants to animals. They share a DEAD motif and belong to the DEAD-box polypeptide 3 (DDX3) subfamily with a major role in RNA metabolism. The lineage-specific expression patterns and various g
(AUC). The %ID and SUV are used for normalizing the signal observed in the region of interest for the amount of tracer injected into the subject. The value of %ID can range from 0 to a value that exceeds 100% if a large percent of the dose accumulates into a site with a mass ...
Masses of these clouds range from roughly a solar mass to thousands of solar masses, with the distribution of clump masses fitting a power law such that most of the clumps are of low mass, as is also true of stars in general. The cloud properties described below are used to constrain ...
The breakdown diagram, the graph of fragment ion abundances as a function of the internal energy of the ion, is computed from QET rate constants, and the mass spectrum is the convolution of the energy deposition function for the ionization process, e.g., the Franck–Condon factors for the ...