Výsledky vyhledávání - "W. L. Zielinski"

Synthesis and stability of isotopically labeled p-chloro-m-xylenol (PCMX)

Autor: J C, Reepmeyer, W L, Zielinski, J E, Leakey, Y, Si

Publikováno v: Pharmaceutical research. 10(10)

The synthesis, reaction kinetics, and pH stability of isotopically labeled p-chloro-m-xylenol (PCMX) were evaluated. While base catalysis was more rapid than acid catalysis, the latter allowed the use of a cosolvent for deuterium and tritium labeling

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::dbaee44ece492d7586c032d8789f8063
https://pubmed.ncbi.nlm.nih.gov/8272409

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Structural transformations during the gas chromatography of carbamates

Autor: W. L. Zielinski, L. Fishbein

Publikováno v: Chromatographia. 2:38-56

There is no apparent paucity of examples illustrative of the structural changes observed during the gas chromatography of diverse carbamates and thiocarbamates. In many cases the resultat thermal degradation products observed are analogous in some me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5f30f5582807465732bafff4bd937bd
https://doi.org/10.1007/bf02341318

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Substituent Effects on the Bands Near 1600 cm−1in The Ir Spectra of Azobenzene and Some Substituted Azobenzenes

Autor: K. K. Deb, W. L. Zielinski, J. M. Casper

Publikováno v: Spectroscopy Letters. 6:585-589

The mean positions and apparent extinction coefficients of the ring stretching bands near 1600 cm−1 in the IR spectra of trans azobenzene and some substituted trans azobenzenes are reported. These results are discussed in relation to values reporte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d536c9543c2f7e84038e1d682e86ad49
https://doi.org/10.1080/00387017308060848

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Substituent Effects On The Carbonyl Stretching Vibration In The Ir Spectra Of Some Substituted Benzophenones

Autor: W. L. Zielinski, K. K. Deb

Publikováno v: Spectroscopy Letters. 7:193-201

The band frequencies and integrated intensities of the carbonyl stretching absorptions in a series of substituted benzophenones were examined as a function of the inductive and mesomeric effects of the substituents.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b98cc887f2b607c2c6a23090f373ca13
https://doi.org/10.1080/00387017408067236

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Evaluation of the internal standard method for the quantitative estimation of oil polymer content by gas chromatography

Autor: W. L. Zielinski

Publikováno v: Journal of the American Oil Chemists' Society. 41:249-251

The use of an internal standard to quantitatively estimate the polymer content of fatty acid ester samples has been described and evaluated. Standard samples of known composition have been prepared and analyzed. The mean of the deviations from actual

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40b631570e4cfdeccefb357dfabc602f
https://doi.org/10.1007/bf02667010

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High performance liquid chromatographic analysis of supplemental vitamin E in feed

Autor: B, Shaikh, H S, Huang, W L, Zielinski

Publikováno v: Journal - Association of Official Analytical Chemists. 60(1)

Supplemental vitamin E is extracted from feed in one step with methanol and analyzed by reverse phase partition chromatography in less than 10 min, using isocratic elution with either methanol or water-methanol as the mobile phase. Detection response

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::f072767d67ef3eefbea56a7f224dc4aa
https://pubmed.ncbi.nlm.nih.gov/833088

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