Výsledky vyhledávání - "Katie L Thomas"

Oxygen induction of a novel fatty acid n−6 desaturase in the soil protozoon, Acanthamoeba castellanii

Autor: Andrew J. Rutter, R. James Henderson, John L. Harwood, David Lloyd, Katie L. Thomas, Derek Herbert

Publikováno v: Biochemical Journal. 368:57-67

Induction of fatty acid desaturation is very important for the temperature adaptation of poikilotherms. However, in oxygen-limited late-exponential-phase Acanthamoeba castellanii cultures, oxygen alone was able to induce increased activity of a fatty

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4bcf94b2b71c58e5f8965c03279d3f3
https://doi.org/10.1042/bj20020189

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Direct interface of chemistry to microbiological systems: membrane inlet mass spectrometry

Autor: George Cowie, Katie L. Thomas, David Lloyd, Alan G. Williams, Jonathan D Tammam

Publikováno v: Journal of Microbiological Methods. 48:289-302

Direct measurement of dissolved gases and low molecular weight volatiles through permeable membranes (e.g. 50-microm-thick silicone rubber), provides an invaluable tool for the investigation of the activities of microorganisms in the laboratory and i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b28ff06d651b360a6797fc4b6e18db73
https://doi.org/10.1016/s0167-7012(01)00331-1

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Methanogenesis and CO2 exchange in an ombrotrophic peat bog

Autor: Karl Dunbar Stephen, J. Benstead, Katie L. Thomas, Siôn S.H. Lloyd, J.R.M. Arah, Kevin L. Davies, David Lloyd

Publikováno v: Atmospheric Environment. 32:3229-3238

Methanogenesis was studied in water-saturated peat cores from hollows in Ellergower Moss, New Galloway, Scotland. The concentration of CH4, increased with depth from 0.8 μM at the surface to reach a plateau of 500 μM at 14 cm; at this depth CO2 con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b53c420298a1fa74b1baa2dbcfc19e1
https://doi.org/10.1016/s1352-2310(97)00481-0

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Oxygen induces fatty acid (n-6)-desaturation independently of temperature inAcanthamoeba castellanii

Autor: John L. Harwood, David Lloyd, Andrew J. Rutter, Katie L. Thomas, Marc T. E. Suller

Publikováno v: FEBS Letters. 425:171-174

Induction of a microsomal oleate delta12 (n-6) desaturase which is mainly responsible for an increase in membrane lipid unsaturation at low temperature has been observed in the free-living amoeba Acanthamoeba castellanii. In this study we show that t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24dfe874f596d98aa3ec7d3394df5373
https://doi.org/10.1016/s0014-5793(98)00218-x

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Micro-ecology of peat: minimally invasive analysis using confocal laser scanning microscopy, membrane inlet mass spectrometry and PCR amplification of methanogen-specific gene sequences

Autor: David Lloyd, Katie L Thomas, Anthony Hayes, Bethan Hill, Barbara A Hales, Clive Edwards, Jon R Saunders, Donald A Ritchie, Matthew Upton

Publikováno v: FEMS Microbiology Ecology. 25:179-188

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::051262088befb6f0395e2cde4cd16324
https://doi.org/10.1111/j.1574-6941.1998.tb00471.x

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Diurnal Oscillations of Gas Production and Effluxes (CO2 and CH4) in Cores from a Peat Bog

Autor: J. Benstead, David D. Lloyd, Siôn S.H. Lloyd, Katie L. Thomas

Publikováno v: Biological Rhythm Research. 29:247-259

Peat cores (15 cm diam X 30 cm deep) from Ellergower Moss, New Galloway, Scotland were kept and monitored at constant temperature (10 ± 0.1oC) for gas production using a 1.6 mm diam stainless steel probe fitted with a membrane inlet and connected to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fe13e1ca61dc33571f3b51bf701517e
https://doi.org/10.1076/brhm.29.3.247.1442

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A membrane-inlet mass spectrometer miniprobe for the direct simultaneous measurement of multiple gas species with spatial resolution of 1 mm

Autor: T.Norman Williams, Keith Oliver, David Lloyd, Katie L. Thomas, Darren Price, Bill O'Neil

Publikováno v: Journal of Microbiological Methods. 25:145-151

The design and construction of a membrane-covered gas miniprobe inlet using a quadrupole mass spectrometer is described. The probe is a metre-long steel capillary tube (o.d. 1.6 mm) terminating in a 4 cm 300 μm o.d. hypodermic needle. Response times

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35bc363d00d64bd11a336869daa92f1f
https://doi.org/10.1016/0167-7012(96)00011-5

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Role of wetland plants in the diurnal control of CH4 and CO2 fluxes in peat

Autor: David Lloyd, Kevin L. Davies, Katie L. Thomas, J. Benstead

Publikováno v: Soil Biology and Biochemistry. 28:17-23

We demonstrate that a major portion of the microbial activities in peat monoliths are driven by photosynthetic processes and that effluxes of CH4 and CO2 are regulated by the surface vegetation. CH4 and CO2 monitored continuously at a depth of 15 cm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d663ab3e6af8e834c9064c371d82844a
https://doi.org/10.1016/0038-0717(95)00103-4

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Measurement of denitrification in estuarine sediment using membrane inlet mass spectrometry

Autor: Katie L. Thomas, David Lloyd

Publikováno v: FEMS Microbiology Ecology. 16:103-114

Denitrification was measured in intact sediment cores and in homogenised slurries using membrane inlet mass spectrometry. Dissolved concentrations of O2, N2, N2O and CO2 were simultaneously monitored. Using a 0.8 mm diameter needle probe, a compariso

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a815bcb40b40015155ae5f1b317b29cc
https://doi.org/10.1111/j.1574-6941.1995.tb00274.x

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