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An atom, other than carbon, located in the ring structure of an organic compound, as the N in pyridines or pyrimidines (heterocyclic compounds).
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Characterization of heteroatom compounds in a crude oil and its saturates, aromatics, resins, and asphaltenes (SARA) and non-basic nitrogen fractions analyzed by negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry.
Table 2 lists the properties of heteroatom-containing aromatic urethane (meth)acry-late oligomers, and Table 3 lists the performance of three formulations based on the heteroatom aromatic urethane (meth)acrylate oligomers.
Mechanism of biochemical action of substituted Benzopyran-2-ones, part 8: Acetoxycoumarin: protein transacetylase-specificity for aromatic nuclear acetoxy groups in proximity to the oxygen heteroatom.
Ferrari; Veronique; Composition structured with a polymer containing a heteroatom and an Organogelator, US Patent Application 20080057011, March 6, 2008, assigned to L'Oreal.
M is a multivalent heteroatom having at least one lone pair of electrons selected from oxygen, nitrogen and sulfur, directly attached to the light emitting moiety of Lumi at one end and to P at the other end.
16) For example Jia Zhou and Ruyu Chen, 'Synthesis and crystal structure of 2-phosphonoalkyl-1,2-benzisoselenazol-3(2H)-ones and their antitumor activities', Heteroatom Chemistry, vol.
Contains over 250 specialist reviews, logically organized by size and heteroatom content of the heterocyclic ring
Assisted by coordination to the heteroatom (Sulfur) of the P3HT, copper ions were distributed uniformly throughout the polymer layer.
Mostly, the heterocyclic compounds containing O, S and N as heteroatom serve as good inhibitors for corrosion [19].
2] are each independently hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; M optionally is a divalent hydrocarbon connecting group of from 1 to about 20 carbon atoms to link the silicon atom and the L group; L is a covalently bound hydrocarbon linking group of from 1 to about 20 carbon atoms or a heteroatom linking group selected from the group consisting of --O--, --S--, --[NR.
b]n>0 a=3-b b=0, 1 or 2 each Y is independently a heteroatom is selected from O or N; if Y is N, then the valency of Y is 2; if Y is O, then the valency of Y is 1; each [R.