A5087995690- Archaeology and ancient environmental studies
- Pacific and Southeast Asian Studies
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Petroleum Processing and Analysis
- Microbial bioremediation and biosurfactants
- Enhanced Oil Recovery Techniques
- Pleistocene-Era Hominins and Archaeology
- Microbial Community Ecology and Physiology
- Hydraulic Fracturing and Reservoir Analysis
- Isotope Analysis in Ecology
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- History of Science and Medicine
- Reservoir Engineering and Simulation Methods
- Oil Spill Detection and Mitigation
- Diverse Historical and Scientific Studies
- Maritime and Coastal Archaeology
- Image Processing and 3D Reconstruction
- Chemical Synthesis and Reactions
- Geological formations and processes
- Historical Studies and Socio-cultural Analysis
- Clay minerals and soil interactions
- Classical Antiquity Studies
- Geological Studies and Exploration
Newcastle University
2008-2024
Liverpool John Moores University
2021
Aberystwyth University
2019
Czech Academy of Sciences
2013
Cheltenham Festivals
2013
Chiang Mai University
2008
University of Auckland
1997-2003
University of Newcastle Australia
2001
City College Brighton and Hove
1983-1999
North Dakota State University
1997
The principal controls on the fluid properties of biodegraded oil systems have been determined by a combination petroleum geochemistry, numerical modeling biodegradation in reservoirs, and analysis property data sets from variety geological settings. Petroleum proceeds under anaerobic conditions any reservoir that has water leg not heated to temperatures more than 80C. In most reservoirs with low concentrations aqueous sulfate, methanogenic degradation is primary mechanism degradation,...
Summary Phytoplankton have been shown to harbour a diversity of hydrocarbonoclastic bacteria (HCB), yet it is not understood how these phytoplankton‐associated HCB would respond in the event an oil spill at sea. Here, we assess and dynamics bacterial community associated with natural population marine phytoplankton under spill‐simulated conditions, compare that free‐living (non phytoplankton‐associated) community. While crude severely impacted was likely conducive snow formation, analysis...
Plate tectonics forms and destroys sedimentary basins, accumulating organic carbon converting it into mobile petroleum which may be concentrated in reservoir traps which, if temperatures are below 80°C, become biologically degraded (biodegraded). The biodegradation process produces altered, denser, heavy oils methane as a primary product. Much of the world’s oil is biodegraded under anaerobic conditions, with being major by-product action deep biosphere on when sulphate not present an...
A distinctive feature of the Deepwater Horizon (DwH) oil spill was formation significant quantities marine snow (MOS), for which mechanism(s) underlying its remain unresolved. Here, we show that Alteromonas strain TK-46(2), Pseudoalteromonas TK-105 and Cycloclasticus TK-8 – organisms became enriched in sea surface slicks during contributed to MOS and/or dispersion oil. In roller-bottle incubations, cells their produced EPS yielded MOS, whereas did not. Interestingly, able degrade n-alkanes...
SUMMARY Bayesian methods are now widely used for analysing radiocarbon dates. We find that the non-informative priors in use literature generate a bias towards wider date ranges which does not general reflect substantial prior knowledge. recommend using distribution of difference between earliest and latest dates has uniform distribution. show how such derived from simple physical model deposition observation process. illustrate this case-study, examining effect various have on reconstructed...
Abstract The SE‐SZ‐8 site of Nanggu is a large Lapita in the Reef/Santa Cruz group Southeast Solomon Islands. This paper provides detailed discussion its geomorphological and environmental context on Santa within position four marine shell dates from it, followed by Bayesian analysis radiocarbon dating site. includes two new additional species to overcome possible problems due selected for dating. Together these data indicate that despite recent critique sequence three excavated decorated...
We have developed a software utility, “DateLab”, for conventional radiocarbon age (CRA) calibration and Bayesian analysis of CRAs. The current version has smaller range applicability than other similar utilities such as Bcal, Oxcal, Mexcal. However, it enables some common types CRA datesets. main advantages DateLab are its high quality sampling algorithm, the possibility carrying out model comparison hypothesis testing in straightforward way, unbiased character summary statistics on which depends.
The fate of estrone (El), 17beta-estradiol (E2), and 17alpha-ethynylestradiol (EE2) was investigated in two nitrite-accumulating sequencing batch reactors operating under strictly aerobic (SBR1) conditions at different sludge ages (SRT, 1.7 to 17.1 d) anoxic/anaerobic/aerobic (SBR2) with phases durations redox conditions, using a modified GC-MS analytical method for estrogen detection ng/L concentrations. In SBR1, > or =98% E2 removed (specific removal rate ranged from 0.375 (at SRT 2.625...
It is necessary to calculate location-specific marine ΔR values in order calibrate samples using calibration curves such as those provided through the IntCal98 (Stuiver et al. 1998) data. Where known-age are available, this calculation straightforward (i.e. Stuiver 1986). In case that a paired marine/terrestrial sample performed, however, standard and Braziunas 1993) requires treated relating isochronous events. This may not be an appropriate assumption for many archaeological samples....