Výsledky vyhledávání - "Alfred Preiß"

Quantitative 1H NMR-analysis of technical octabrominated diphenylether DE-79™ and UV spectra of its components and photolytic transformation products

Autor: Manfred Elend, Alfred Preiss, Cornelius Zetzsch, Heinz-Ulrich Krüger, Qing Liu, Ana Maria Geller

Publikováno v: Chemosphere. 73:S44-S52

A quantitative analysis of the technical octabromo diphenylether mixture DE-79™ is performed by 1 H NMR, avoiding any separation technique. The mass fractions are 36% BDE183, 19% BDE197, 13.1% BDE207, 9.1% BDE196, 7.3% BDE153, 6.2% BDE203, 2.2% BDE

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15c8aae9d57f5484bc1c1431a9de45e9
https://doi.org/10.1016/j.chemosphere.2007.02.070

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Metabolism of a nonylphenol isomer by Sphingomonas sp. strain TTNP3

Autor: Rong Ji, Manfred Elend, Andreas Schäffer, P. F. X. Corvini, Alfred Preiss, Ralph Vinken, Juliane Hollender

Publikováno v: Environmental Chemistry Letters. 2:185-189

For elucidation of the metabolism of the endocrine disruptor nonylphenol by Sphingomonas sp. strain TTNP3, the degradation of an isomer of nonylphenol, 4(2prime,6prime-dimethyl-2prime-heptyl)-phenol, has been studied. As in the case of 4(3prime,5prim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b326626ed87fd57441f7128b7bca95b4
https://doi.org/10.1007/s10311-004-0094-3

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Analysis of highly polar compounds in groundwater samples from ammunition waste sites. Part I—Characterization of the pollutant spectrum

Autor: Manfred Elend, Simone Tränckner, Alfred Preiss, Susanne Gerling

Publikováno v: Magnetic Resonance in Chemistry. 43:736-746

Five groundwater samples from the former ammunition production site at Elsnig, Germany, were analyzed for highly polar components by LC–NMR and LC–MS. A variety of unknown pollutants could be identified. Possibilities and limitations of the combi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4ddc185c2a69d52fe0de2eeaa38d0ab
https://doi.org/10.1002/mrc.1609

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Human biomonitoring of pyrethrum and pyrethroid insecticides used indoors

Autor: Alfred Preiss, L Elflein, Edith Berger-Preiss, Manfred Elend, G. Wünsch, Karsten Levsen

Publikováno v: Journal of Chromatography B. 795:195-207

This work describes a gas chromatographic-mass spectrometric method employing negative chemical ionization (NCI) for the determination of E-cis/trans-chrysanthemumdicarboxylic acid (CDCA) in human urine used as a biomarker for the exposure to pyrethr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a6b786c384dc29737f4b1d505747973
https://doi.org/10.1016/s1570-0232(03)00566-x

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Verapamil: identification of novel metabolites in cultures of primary human hepatocytes and human urine by LC-MS n and LC-NMR

Autor: Markus Walles, Jürgen Borlak, Manfred Elend, Alfred Preiss, Thomas Thum, Karsten Levsen

Publikováno v: Xenobiotica. 33:655-676

1. Verapamil is a well-known and world-wide prescribed calcium antagonist, but it suffers from extensive first-pass metabolism. Although it has been marketed for many years, a complete understanding of its biotransformation in humans is still lacking

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67827d3a2c18c068df554fd3d0712c61
https://doi.org/10.1080/0049825031000093600

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Two new asterosaponins from the starfishAsterias rubens: application of a cryogenic NMR probe head

Autor: R. Weisemann, Alfred Preiss, K. Levsen, M. Sandvoss, M. Spraul

Publikováno v: Magnetic Resonance in Chemistry. 41:949-954

We report two new asterosaponins from the Baltic starfish Asterias rubens along with their 1H and 13C NMR data. The compounds were isolated after on-flow liquid chromatography–NMR–mass spectrometry screening indicated that they had not been ident

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87877f6fcda8ca30d1223994a7f8df93
https://doi.org/10.1002/mrc.1277

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Combination of matrix solid-phase dispersion extraction and direct on-line liquid chromatography–nuclear magnetic resonance spectroscopy–tandem mass spectrometry as a new efficient approach for the rapid screening of natural products

Autor: Gerold Wuensch, Anja Weltring, Alfred Preiss, Martin Sandvoss, Karsten Levsen

Publikováno v: Journal of Chromatography A. 917:75-86

A combination of matrix solid-phase dispersion extraction (MSPD) and LC–NMR–MS hyphenation is proposed as a rapid screening method of natural products for unknown compounds. In this report, this new analytical approach is applied for the first ti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::123a8a63cb9b722625c17c32528bd2f4
https://doi.org/10.1016/s0021-9673(01)00668-9

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