Results 171 to 180 of about 12,602 (203)

Comparative Evaluation of Puffing Effects on Physicochemical and Volatile Profiles of Brown and Refined Rice. [PDF]

open access: yesFoods
Liu X   +10 more
europepmc   +1 more source

Speculating about pyrazines

Proceedings of the Royal Society of London. Series B: Biological Sciences, 1990
Of the various types of alerting signals found in nature, odours are the least well understood. The worldwide distribution of pyrazines in plants, insects, terrestrial vertebrates, marine organisms, fungi and bacteria suggests that they are of special significance.
A, Woolfson, M, Rothschild
openaire   +2 more sources

2,3,5,6-Tetrakis(phenoxymethyl)pyrazine and 2,3,5,6-tetrakis(phenylsulfanylmethyl)pyrazine

Acta Crystallographica Section C Crystal Structure Communications, 2007
The title compounds, C(32)H(28)N(2)O(4), (I), and C(32)H(28)N(2)S(4), (II), respectively, are tetrasubstituted pyrazines and both possess C(i) symmetry. They differ only in the hetero atom (X) of the -CH(2)XPh side-arm substituents: X = O in (I) and S in (II).
Tokouré, Assoumatine   +2 more
openaire   +2 more sources

On the pyrazine and pyrazine–pyrimidine dimers

The Journal of Chemical Physics, 1986
Spectra of the pyrazine-d4, pyrazine-h4–pyrazine-d4, and pyrazine-d4–pyrimidine dimer are obtained and analyzed with the help of Lennard-Jones–hydrogen-bonding (LJ–HB) potential energy calculations. The pyrazine isotopic hetero and homo dimers possess nearly identical spectra with the exception that the perpendicular dimer features are displaced to the
J. Wanna, E. R. Bernstein
openaire   +1 more source

Pyrazines

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +1 more source

Pyrazine Analogues of Dipyrrolylquinoxalines

Organic Letters, 2003
[structure: see text]. The synthesis of novel pyrazine derivatives bearing pyrrolic substituents is reported; the ability of these systems to bind certain biologically relevant anions in dichloromethane is also detailed.
Jonathan L, Sessler   +3 more
openaire   +2 more sources

Vibrational spectra of [1H4]pyrazine and [2H4]pyrazine

Journal of the Chemical Society, Faraday Transactions 2, 1985
Infrared and Raman spectra of [1H4]pyrazine and [2H4]pyrazine have been reinvestigated and a general assignment of all the observed bands is proposed which modifies some previous assignments of fundamental vibrations. The present assignment satisfies the isotopic product rule for i.r.- and Raman-active fundamentals.
Juan F. Arenas   +4 more
openaire   +1 more source

Microbial metabolism of pyrazines

Critical Reviews in Microbiology, 2011
Pyrazines are a group of 1,4 dinitrogen substituted benzenes. They have near ubiquitous biological distribution and majority are anthropogenic. The demand for pyrazines in the recent years has increased owing to their vast applications in the field of food, agriculture and medicine.
K S, Rajini   +3 more
openaire   +2 more sources

Synthesis of tetrasubstituted pyrazines and pyrazine N-oxides

Tetrahedron Letters, 2010
Abstract An efficient synthesis of tetrasubstituted unsymmetrical pyrazines and their related pyrazine N-oxides has been developed from commercially available 2-chloro-3-methylpyrazine. The procedure and scope of these synthesis routes are described.
Jae Uk Jeong   +3 more
openaire   +1 more source

ChemInform Abstract: Pyrazine. Syntheses of Naturally Occurring Pyrazines

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. OHTA, Y. AOYAGI
openaire   +1 more source

Home - About - Disclaimer - Privacy