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101.
102.
Wolff JC Hawtin PN Monté S Balogh M Jones T 《Rapid communications in mass spectrometry : RCM》2001,15(4):265-272
Liquid chromatography/particle beam mass spectrometry (LC/PB-MS) was used for the structural elucidation of some impurities in nabumetone as this compound poorly ionises by atmospheric pressure ionisation (API) techniques. PB-MS was optimised for nabumetone and a sensitivity study was carried out. To obtain full scan electron ionisation spectra a minimum of 100 ng of compound on column was needed. By using 20 mg/mL solutions of nabumetone, impurities at levels of about 250 ppm mass fraction relative to nabumetone could be detected. Results were compared with LC/API-MS and previous GC/MS. 相似文献
103.
Among the organoselenium compounds that mimic the action of the natural enzyme glutathione peroxidase (GPx), there are certain basic differences in the activity, substrate specificity and mechanism. These differences arise mainly from the nature of the substituents near the reaction center, and stability and reactivity of the intermediates. As an attempt to draw some general concepts for the development of new mimics, a structure - activity correlation between natural GPx and some existing mimics is described. 相似文献
104.
Bryant DK Monté S Man WJ Kramer K Bugelski P Neville W White IR Camilleri P 《Rapid communications in mass spectrometry : RCM》2001,15(6):418-427
Principal component analysis (PCA) has been used to analyse mass spectral peptide profiles obtained from the enzymatic digestion of standard protein mixtures. Scores and loadings plots clearly revealed peptide fragments that differentiated one protein mixture from another. Peptide map search results identified with a high degree of certainty any additional proteins in these mixtures. As a proof-of-concept this methodology was applied to hepatic protein mixtures obtained from rats treated with two hepatotoxic compounds: methapyriline and SB-219994. Liver proteins were extracted, pre-separated by one-dimensional polyacrylamide gel electrophoresis, subjected to tryptic digestion and analysed by mass spectrometry. Two up-regulated proteins, glutathione S-transferase with methapyrilene and peroxisomal bifunctional enzyme with SB-219994, were identified in this manner. 相似文献
105.
A system utilizing laser-induced fluorescence for surface monitoring is described. Results of laboratory and industrial measurements of surface films are reported and further applications of the technique are described. 相似文献
106.
107.
Cutler P Bell DJ Birrell HC Connelly JC Connor SC Holmes E Mitchell BC Monté SY Neville BA Pickford R Polley S Schneider K Skehel JM 《Electrophoresis》1999,20(18):3647-3658
A single dose of puromycin aminonucleoside (PAN) given parenterally to rats induces ultrastructural glomerular changes and a nephrotic syndrome similar in many respects to human minimal change nephropathy. The exact aetiologies of both the human and the experimental syndromes are unknown, and are probably multifactorial. However, among the observed consequences in humans and rats is increased plasma protein excretion in urine, beginning in the latter typically 3-6 days after PAN administration. In view of this, two-dimensional polyacrylamide gel electrophoresis (2-D PAGE) has been used to profile urinary proteins during PAN-induced nephrotoxicity and subsequent recovery in the rat. In addition, urinary high performance liquid chromatography (HPLC) profiles and high resolution proton nuclear magnetic resonance (NMR) spectroscopy has been utilised to simultaneously detect toxin-induced changes in the relative concentrations of a number of metabolites. The proteomic approach, in conjunction with these other techniques, has the potential to provide significantly more mechanistic information than is provided readily by traditional clinical chemistry. 相似文献
108.
WOLF-W. Du Mont Ralph Hensel Tevfik Severengiz 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-3):73-76
Abstract Phosphanes react with tellurium much more selectively than with oxygen, sulfur and selenium. Tertiary phosphanes give “phosphane tellurides” that can equivalently be described as coordination compounds of the phosphanes with Te(O); these are kinetically labile to (phosphane) ligand substitution reactions in the nmr time scale.1 相似文献
109.
Wolf-W. Du Mont Ralph Hensel Silvia Kubiniok Lutz Lange Tevfik Severengiz 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-2):373-376
Abstract Reactions of diphosphanes and cyclophosphanes with selenium, tellurium and organic ditellurides have been studied. 相似文献
110.