Výsledky vyhledávání - "John H. Lauterbach"

The use of chemical derivatization to enhance liquid chromatography/tandem mass spectrometric determination of 1-hydroxypyrene, a biomarker for polycyclic aromatic hydrocarbons in human urine

Autor: Weng Naidong, Haihong Shi, Austin C. Li, Xiangyu Jiang, Shaolian Zhou, John H. Lauterbach, Wilson Z. Shou, Yinghe Li

Publikováno v: Rapid Communications in Mass Spectrometry. 19:3331-3338

This article presents an analytical approach that used chemical derivatization to enhance mass spectrometric (MS) response in electrospray ionization (ESI) mode of 1-hydroxypyrene (1-OHP), a commonly used biomarker to monitor human exposure to polycy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e59f6e50a04dee168dab5a0d5703441
https://doi.org/10.1002/rcm.2196

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An improved headspace solid-phase microextraction method for the analysis of free-base nicotine in particulate phase of mainstream cigarette smoke

Autor: John H. Lauterbach, William S. Rickert, Mingliang Bao, Peter Joza

Publikováno v: Analytica chimica acta. 663(1)

The content of free-base nicotine in cigarette smoke is a controversial subject, partly due to methodological issues. In this investigation, an improved method to measure free-base nicotine in cigarette smoke using headspace solid-phase microextracti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cf91c19a9cafd3c4baf2145330d491d
https://pubmed.ncbi.nlm.nih.gov/20172096

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Quantitative method for the analysis of tobacco-specific nitrosamines in cigarette tobacco and mainstream cigarette smoke by use of isotope dilution liquid chromatography tandem mass spectrometry

Autor: John H. Lauterbach, Mehran Sharifi, William S. Rickert, Jingcun Wu, Peter Joza

Publikováno v: Analytical chemistry. 80(4)

An improved liquid chromatography tandem mass spectrometry (LC-MS/MS) method has been developed for the determination of tobacco specific nitrosamines (TSNA). It utilizes four stable isotope-labeled internal standards instead of two as reported by ot

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e0cfefa0267c437b1cb84c149f969af
https://pubmed.ncbi.nlm.nih.gov/18189372

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Effect of smoking conditions and methods of collection on the mutagenicity and cytotoxicity of cigarette mainstream smoke

Autor: Amit H. Trivedi, Rafikali A. Momin, William S. Rickert, Wendy G. Wright, John H. Lauterbach

Publikováno v: Toxicological sciences : an official journal of the Society of Toxicology. 96(2)

There is a history for the use of in vitro bioassays to assess the toxicological properties of mainstream cigarette smoke (MSS). The results described in the literature were, for the most part, obtained with MSS collected under Federal Trade Commissi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6bf90d32e3c9dcb99a0f83ff9589709
https://pubmed.ncbi.nlm.nih.gov/17189562

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Determination of S-phenylmercapturic acid in human urine using an automated sample extraction and fast liquid chromatography-tandem mass spectrometric method

Autor: Weng Naidong, Heiko Junga, Yinghe Li, Haihong Shi, Xiangyu Jiang, John H. Lauterbach, Austin C. Li

Publikováno v: Biomedical chromatography : BMC. 20(6-7)

S-phenylmercapturic acid is widely accepted as a specific biomarker for the evaluation of benzene exposure. Here, we describe a fast, specific and sensitive high-performance liquid achromatography coupled with tandem mass spectrometry (LC-MS/MS) meth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1505606fbebcd70849fce0a5d6adbbef
https://pubmed.ncbi.nlm.nih.gov/16779771

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Specific spectral assignments for acetoxyl-group resonances in proton magnetic resonance spectra of methyl β-D-glucopyranoside tetraacetate and related derivatives

Autor: Derek Horton, John H. Lauterbach

Publikováno v: Carbohydrate Research. 43:9-33

Methyl β- D -glucopyranoside tetraacetates (1) having a trideuterioacetyl group at O-2 (1a), O-3, (1b), O-4 (1c), and O-6 (1d) were synthesized by unambiguous routes to permit assignment of each individual acetoxyl-group signal in the p.m.r. spectru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::301e6adc8d93c687fae582e11faf37e0
https://doi.org/10.1016/s0008-6215(00)83968-3

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