Search Results - "Wilkins, John P.G."

Theaflavate B, ISOTHEAFLAVIN-3′-O-GALLATE and NEOTHEAFLAVIN-3-O-GALLATE: three polyphenolic pigments from black tea by Lewis, John R, Davis, Adrienne L, Cai, Ya, Davies, Alan P, Wilkins, John P.G, Pennington, Michael

“…Three new polyphenolic compounds, theaflavate B, isotheaflavin-3'-O-gallate and neotheaflavin-3- O-gallate, have been characterised in extracts from black tea…”
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Fragmentation studies on lasalocid acid by accurate mass electrospray mass spectrometry by Lopes, Norberto P, Gates, Paul J, Wilkins, John P G, Staunton, James

“…Lasalocid acid is an important polyether ionophore veterinary drug. Polyether ionophores have been the subject of MS study for many years, but this is the…”
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A polyphenolic pigment from black tea by Davis, Adrienne L., Lewis, John R., Cai, Ya, Powell, Chris, Davis, Alan P., Wilkins, John P.G., Pudney, Paul, Clifford, Mike N.

“…A novel yellow polyphenolic compound has been isolated from black tea and its structure characterized. A yellow polyphenolic compound has been isolated from…”
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A New Type of Tea Pigment-From the Chemical Oxidation of Epicatechin Gallate and Isolated from Tea by Wan, Xiaochun, Nursten, Harry E, Cai, Ya, Davis, Adrienne L, Wilkins, John P G, Davies, Alan P

“…( ‐ )‐Epicatechin‐3‐O‐gallate (ECG), one of the major green tea poly‐phenols, was oxidised chemically using potassium ferricyanide. The major oxidation…”
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The characterisation of polyether ionophore veterinary drugs by HPLC-electrospray MS by Harris, J A, Russell, C A, Wilkins, J P

“…We undertake the determination of a wide range of veterinary drug residues in a range of animal products. Various screening analyses are employed, followed by…”
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Reactions of perfluorotri-n-butylamine fragment ions in the quadrupole ion trap: the origin of artefacts in the perfluorotri-n-butylamine calibration spectrum by Creaser, Colin S., West, Sarah K., Wilkins, John P. G.

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Investigations by HPLC-electrospray mass spectrometry and NMR spectroscopy into the isomerisation of salinomycin by Davis, A L, Harris, J A, Russell, C A, Wilkins, J P

“…HPLC-MS studies have indicated that certain polyether ionophore veterinary drugs are prone to degradation when stored as water-methanol solutions at ambient…”
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Investigating the Use of Deuterodiazomethane Derivatization for Enhancing Trace Gas Chromatography/Mass Spectrometry Determination of Halophenols in the Presence of Haloanisoles by Wilkins, John P. G., Yorke, Clare P., Tinkler, Mark R.

“…The trace detection of halophenols and haloanisoles by means of single, low‐resolution GC/MS analysis, following stable isotope derivatization, is described…”
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Saw-toothed grain beetle Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) collection, identification, and bioassay of attractive volatiles from beetles and oats by WHITE, P. R, CHAMBERS, J, WALTER, C. M, WILKINS, J. P. G, MILLAR, J. G

“…Over 200 beetle- and food-produced volatiles were collected from cultures of the saw-toothed grain beetle Oryzaephilus surinamensis (L.) on oats. It proved…”
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Metabolism by rat hepatic microsomes of individual isomers and congeners in aroclor 1016 by BORLAKOGLU, J. T, WILKINS, J. P. G, KILS, R. R

“…Twelve PCB congeners were identified in Aroclor 1016 by high-performance capillary gas chromatography. The microsomal fraction of rat hepatic homogenate was…”
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Polychlorinated biphenyls in extracts of brain from manx shearwaters by Borlakoglu, J T, Wilkins, J P, Walker, C H, Dils, R R

“…The concentrations of PCBs present in the brain tissue of three manx shearwaters captured off Scotland were documented. Mean concentrations in the three tissue…”
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Organophosphorus sulphides, sulphoxides and sulphones. Part I. Determination of residues in fruit and vegetables by gas-liquid chromatography by Hill, A R, Wilkins, J P, Findlay, N R, Lontay, K E

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Modified gas-liquid chromatographic method for determining bromide/total bromine in foodstuffs and soils by Roughan, J A, Roughan, P A, Wilkins, J P

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In vitro metabolism of [14C]4-chlorobiphenyl and [14C]2,2',5,5'-tetrachlorobiphenyl by hepatic microsomes from rats and pigeons. Evidence against an obligatory arene oxide in aromatic hydroxylation reactions by Borlakoglu, J T, Haegele, K D, Reich, H J, Dils, R R, Wilkins, J P

“…1. The catalytic activities of cytochromes P-450IA1 and P-450IIB1 in control and Aroclor 1254 treated rats and pigeons (1 mmol/kg) were assessed using…”
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