Výsledky vyhledávání - "Emanuel Gil-Av"

Dependence on Composition of GC Retention on a Self-Associating Solvent/Hydrocarbon Mixture: Its Interpretation by the Computation of Available Sites for Interaction with Solutes

Autor: Teresa Kowalska, Emanuel Gil-Av, S. Costiner

Publikováno v: The Journal of Physical Chemistry. 100:17305-17309

Diamides, e.g., N-lauroyl-l-valine-tert-butylamide, self-associate in appropriate media through hydrogen bonding. Such selectors form with apolar solvents binary phases, for which the contribution of the polar constituent to the overall retention is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e34c883076571cf03b3996a76dd4a0e
https://doi.org/10.1021/jp961849y

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Gas chromatography on a self-associating component of a binary phase. Retention model by formal analogy with conductance of electrolytes in dilute solution

Autor: Katsunori Watabe, Emanuel Gil-Av, Teresa Kowalska, Toshiyuki Hobo

Publikováno v: Chromatographia. 41:221-226

The dependence of specific retention by a binary stationary phase in GC can be expressed as the sum of the products of the specific retention of the pure components times their respective volume fractions. In this study, however, one component has a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07a24d5adf5f0a7998d65325321438aa
https://doi.org/10.1007/bf02267959

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Resolution of non-racemic mixtures in achiral chromatographic systems: A model for, the enantioselective effects observed

Autor: Emanuel Gil-Av, Volker Schurig

Publikováno v: Journal of Chromatography A. 666:519-525

Resolution of non-racemic samples in achiral chromatographic systems can occur when the solute undergoes self-association, e.g. , typically to dimers. In the resulting diastereomeric homo- and hetero-structures, the enantiomers are distributed in a n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a6a2261dee1cbbc92b40a2629b8ded8
https://doi.org/10.1016/0021-9673(94)80413-3

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Amino acid racemization of fossil bone

Autor: Emanuel Gil-Av, Stephen Weiner, Hartwig Elster

Publikováno v: Journal of Archaeological Science. 18:605-617

A study of aspartic acid racemization in different fractions of 51 fossil bones of various ages, shows that the collagen-rich fractions do manifest increasing D-aspartic acid contents with increasing age. No such correlation exists for the fractions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::464849113a960a8eae420b67ecbef140
https://doi.org/10.1016/0305-4403(91)90055-t

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Resolution of α-halogenocarboxylic acids by gas chromatography on (r)-n-lauroyl-α-(1-naphtyl)ethylamine

Autor: Katsunori Watabe, Emanuel Gil-Av

Publikováno v: Journal of Chromatography A. 318:235-246

α-Fluoro-, α-chloro and α-bromo C3-C6 carboxylic acids were separated efficiently into their enantiomers, after conversion into tert.-butylamides, on a whiskerwalled glass capillary column (40 m x 3.5 mm I.D.) coated with (R)-N-lauroyl-α-(1-napth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e0e780acd9fae5739a13e2f6227da680
https://doi.org/10.1016/s0021-9673(01)90684-3

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N-acyl derivatives of chiral amines as novel, readily prepared phases for the separation of optical isomers by gas chromatography

Autor: Binyamin Feibush, Emanuel Gil-Av, Shulamith Weinstein

Publikováno v: Journal of Chromatography A. 126:97-111

The results reported demonstrate that it suffices for a chiral stationary phase to contain an amide group and an asymmetric carbon atom, attached to the nitrogen atom [RCONHCH(CH3)R′], in order to show selectivity in its interaction with the enanti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b77ab7d0f610d192cc8b827cafc66b6
https://doi.org/10.1016/s0021-9673(01)84065-6

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Self-amplification of optical activity by chromatography on an achiral adsorbent

Autor: R. Charles, Emanuel Gil-Av

Publikováno v: Journal of Chromatography A. 298:516-520

Enrichissement de l'activite optique des t-butylamide de N-trifluoroacetyl valine, ester cyclohexyle de trifluoroacetyl divaline et ester isopropyle de trifluoroacetyl alanylglycine par chromatographie phase gazeuse sur chromosorb WAW

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::376496955f52b3482eee85062bf8e4da
https://doi.org/10.1016/s0021-9673(01)92750-5

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trans-chloro(N,N-dimethyl-d-phenylglycine)-(3-methyl-1-phenylpent-1-ene)platinum(II) complexes. HPLC separation and identification of all the diastereomers

Autor: Dietmar Schmidt, Emanuel Gil-Av

Publikováno v: Journal of Organometallic Chemistry. 307:377-383

The diastereomeric trans-chloro(N,N-dimethyl-d-phenylglycine)(3-methyl-1-phenylpent-1-ene)platinum(II) complexes, derived by coordination of the enantiomeric and geometric isomers of 3-methyl-1-phenylpent-1-ene (2), were separated by HPLC. Four trans

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::732013c03d3e37bc1470f60781cbb10e
https://doi.org/10.1016/s0022-328x(00)98961-7

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Extension of the scope of gas chromatographic separation of enantiomers on chiral phases

Autor: Chang Shu-Cheng, R. Charles, Emanuel Gil-Av

Publikováno v: Journal of Chromatography A. 289:53-63

The present scope of application of chiral hydrogen-bonding gas chromatographic phases to the resolution of various classes of optical isomers is briefly reviewed. A recent extension of this approach to the separation of the enantiomers of α-halogen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29d372ff84b20ae2972789c5f85c04e4
https://doi.org/10.1016/s0021-9673(00)95076-3

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