Results 251 to 260 of about 103,540 (321)
Some of the next articles are maybe not open access.
Experientia, 1950
Das Biphenyl wurde mit Hilfe der Methode der «Molecular orbitals» studiert. Die Ergebnisse stimmen mit der praktischen Erfahrung uberein; es scheint aber, das auch sterische Wirkungen mitspielen. Es mus bestritten werden, das diep-Stellung die elektronisch wirksamere ist.
openaire +2 more sources
Das Biphenyl wurde mit Hilfe der Methode der «Molecular orbitals» studiert. Die Ergebnisse stimmen mit der praktischen Erfahrung uberein; es scheint aber, das auch sterische Wirkungen mitspielen. Es mus bestritten werden, das diep-Stellung die elektronisch wirksamere ist.
openaire +2 more sources
The Raman spectrum of biphenyl and biphenyl-d10
Spectrochimica Acta Part A: Molecular Spectroscopy, 1971Abstract A set of polarized Raman spectra obtained from suitably oriented single crystals is presented together with depolarization ratio data for the lines from solution spectra. These measurements allow the symmetries of non-totally symmetric modes to be assigned for the first time from experiment alone.
A. Bree, C.Y. Pang, L. Rabeneck
openaire +1 more source
The Journal of Physical Chemistry A, 2005
High-resolution C(1s) near-edge X-ray absorption and X-ray photoionization spectra of the free biphenyl molecule are presented and theoretically analyzed in order to allow an assignment of the observed spectral features. Finite lifetime broadening, a high density of vibrational states, and a strong overlap of contributions from chemically different ...
I, Minkov +5 more
openaire +2 more sources
High-resolution C(1s) near-edge X-ray absorption and X-ray photoionization spectra of the free biphenyl molecule are presented and theoretically analyzed in order to allow an assignment of the observed spectral features. Finite lifetime broadening, a high density of vibrational states, and a strong overlap of contributions from chemically different ...
I, Minkov +5 more
openaire +2 more sources
The polarized i.r. spectrum of biphenyl and biphenyl-d10
Spectrochimica Acta Part A: Molecular Spectroscopy, 1975Abstract The i.r. spectra of biphenyl and biphenyl- d 10 in the range 80 to 3500 cm −1 have been measured polarized along three mutually perpendicular directions in the crystal; the c polarized spectra are reported here for the first time.
A. Bree, M. Edelson, R.A. Kydd
openaire +1 more source
Analysis of polybrominated biphenyls
Journal of Chromatography A, 1977High-performance liquid chromatography, gas chromatography-mass spectrometry, ultraviolet spectrometry and nuclear magnetic resonance spectrometry have been used to characterize the behaviour of a number of individual brominated biphenyls and to assess the composition of several mixtures of these compounds.
J J, de Kok +3 more
openaire +2 more sources
Polybrominated Biphenyls and Diphenylethers
2000Polybrominated biphenyls (PBBs) and polybrominated diphenylethers (PBDEs), also called brominated diphenyl oxides, are produced and used as flame retardants. There are theoretically 209 different congeners of both PBBs and PBDEs. These congeners have specific chemical and physical properties, which lead to different biological and toxicological effects.
de Boer, J., de Boer, K., Boon, J.P.
openaire +2 more sources
American Journal of Veterinary Research, 1973
SUMMARY Rabbits fed 3 formulations of polychlorinated biphenyl (PCB-1221, PCB-1242, and PCB-1254) had significantly lower serum-neutralizing antibody titers to pseudorabies virus (prv) than did rabbits which were not given the pcb formulations. The serum titers from rabbits given the 3 formulations were approximately one-half those of the controls, and
L D, Koller, J E, Thigpen
openaire +2 more sources
SUMMARY Rabbits fed 3 formulations of polychlorinated biphenyl (PCB-1221, PCB-1242, and PCB-1254) had significantly lower serum-neutralizing antibody titers to pseudorabies virus (prv) than did rabbits which were not given the pcb formulations. The serum titers from rabbits given the 3 formulations were approximately one-half those of the controls, and
L D, Koller, J E, Thigpen
openaire +2 more sources
Metabolism of biphenyl in the rat
Journal of Chromatography A, 1978The metabolism of biphenyl in the rat has been studied by using gas chromatographic and mass spectrometric methods. The free and conjugated urinary metabolites were characterized. Eight new metabolites were isolated: a dihydrodiol and two hydroxydihydrodiols were characteristic for the epoxide--diol pathway.
K, Halpaap, M G, Horning, E C, Horning
openaire +2 more sources
Polychlorinated biphenyls in the environment
Journal of Chromatography A, 1992This review surveys the problems arising from the release of PCBs into the environment from the point of view of the analytical chemist. These problems are very complex and interdependent and so it is essential to recognize their mutual links rather than to separate one problem from another (sources of contamination, fate in the environment, toxic ...
openaire +2 more sources
Recent advances in the biodegradation of polychlorinated biphenyls
World Journal of Microbiology & Biotechnology, 2020Yun Xiang +4 more
semanticscholar +1 more source