Thermally induced leakage and viability studies in an obligate psychrophilic marine bacterium by Paul Robert Kenis

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  • Psychrophilic bacteria.

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Statementby Paul Robert Kenis.
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Pagination[8], 45 leaves, bound :
Number of Pages45
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Open LibraryOL15520702M

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THERMALLY INDUCED LEAKAGE AND VIABILITY STUDIES IN AN OBLIGATE PSYCHROPHILIC MARINE BACTERIUM INTRODUCTION Previous investigations with Vibrio marinus MP -1, an obligate marine psychrophile, have shown that intracellular materials were released into the menstruum when the cells were heat - shocked.

Vibrio marinus MP-1, an obligate psychrophilic marine bacterium, was severely damaged when heat-shocked in the presence of nutrients. Thermally induced leakage materials from cells tested for in the medium were mμ absorbing material (nucleic acids), orcinol reacting material (RNA), ninhydrin reacting material (amino acids), protein, malic Author: Paul Robert Kenis.

Thermally induced leakage of cellular material and viability in Vibrio marinus, a psychrophilic marine bacterium.

Kenis PR, Morita RY. Can J Microbiol, 14(11), 01 Nov Cited by: 6 articles | PMID: Cited by: Corvallis, ) observedheat-induced leakage of material absorbing at mg from the obligate psychrophile, V. marinus MP The present investigation was undertaken to identify the ma-terials leaking from cells exposed to moderate temperatures of 20 to 30 C.

Such studies may indicate the basic differences between the various thermalclasses Cited by:   American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Thermally Induced Damage in Energetic Materials Bradford E.

Clements, Axinte Ionita, T-1 The ability to correlate thermally induced damage in energetic materials to chemical ignition thresholds is an important goal for several DOE programs, including the Advanced Simulation and Computing.

However, temperature gradient induced by thermal operation of heat exchanger piles alters in situ spatial distribution of pore fluid density. Consequently, buoyant flow can occur, even under hydrostatic condition, in the vicinity of heat exchanger piles installed in saturated soils.

thermal runaway, junction temperature should be kept stable during burn-in. To achieve this, different methods have been suggested in literature. In [6] and [7], an electro thermal analysis tool was developed to observe thermal runaway possibilities due to leakage. The thermal runaway is.

In this work, the leakage currents induced by electrical stress and by irradiation are compared. We show that the I g –V g characteristics of a nm-thick oxide are very similar for both types of stresses.

Moreover, we show that the electrical stability and the annealing behavior of the defects at the origin of the leakage current are very similar. We demonstrate that the radiation-induced.

The seasonal selection by temperature of bacteria in an intertidal sediment was investigated, and a simplified method of demonstrating the temperature adaption of a mixed heterotrophic bacterial population was suggested. The method relied upon counting the bacteria which grew at only two separate incubation-temperatures, and compared favourably with more tedions methods which utilise.

Thermally induced lysis and leakage of the psychrophile’s membrane are probably the reasons why psychrophiles are not found in environ ments where the temperature fluctuates above 20°C. A marine vibrio, dcsignatcd as MP-1, was isolntcd from the North Pacific Ocean and was found to bc an obligate psychrophile.

Growth was obtained from -1C (lowest tested) to 2OC with optimal growth. Kenis PR, Morita RY. Thermally induced leakage of cellular material and viability in Vibrio marinus, a psychrophilic marine bacterium. Can J Microbiol. Nov;14(11)– The free fatty acid and phospholipid composition of 4 psychrophilic marineVibrio spp.

have been determined in chemostat culture with glucose as the limiting substrate over a temperature range 0–20°C. All the isolates show maximum glucose and lactose uptake at 0°C and this correlates with maximum cell yield.

None of the isolates contain fatty acids with a chain length exceeding 17 carbon. The thermally induced decarboxylation mechanism of a mixed (PDF) Studies Toward the Thermally Induced One-Step. THE ROLE OF THE THERMAL INDUCED RESIDUAL STRESSES IN A SINGLE FIBRE THERMOPLASTIC MODEL COMPOSITE 1, on 2 and 1 1 Department of Engineering Materials, University of Sheffield, S1 3JD, UK: 2 Department of Mechanical Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ,U.K @ 11 11 4 4 D.

Nedwell G. Floodgate Marine Science Laboratories Menai Bridge Anglesey UK The University of the South Pacific Suva Fiji Abstract The seasonal selection by temperature of bacteria in an intertidal sediment was investigated, and a simplified method of demonstrating the temperature adaption of a mixed heterotrophic bacterial population was suggested.

The method relied upon. Thermally induced time dependence of mechanical properties in biomedical grade polyurethanes. As had been noted in earlier studies on nonmedical segmented urethanes from this laboratory, many of the biomedical grade materials also showed time‐dependent changes in mechanical properties that can be directly related to time‐dependent.

This thermally induced stress affects oxidation kinetics during the rapid‐thermal oxidation (RTO) of silicon. The tensile stress enhances the oxidation towards the edge of the wafer, which is opposite to the effect of the radial temperature gradient. Wang, Ze, Nielsen, James, and Chen, Yuanhang.

"Analysis of Thermally Induced Stresses for Effective Remediation of Lost Circulation Through Drilling Induced Fractures." Proceedings of the ASME 36th International Conference on Ocean, Offshore and Arctic Engineering.

Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology. thermally induced phase transformation. According to Arai and coworkers, -Al 2O 3 (1 00– m2 g–1 surface area) undergoes consecutiv e and irreversible phase transformation at high temperatures (10).

The porous -Al 2O 3 start s to t urn gradually to δ-Al 2O 3 at an. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Traditionally, at early design stages, leakage power is associated with the number of transistors in a design.

Hence, intuitively an implementation with minimum resource usage would be best for low leakage. Such an allocation would generally be followed by switching optimal resource binding to achieve a low power design. Thermally induced leakage and viability studies in an obligate psychrophilic marine bacterium.

Abstract. Graduation date: Vibrio marinus MP-1, an obligate psychrophilic marine\ud bacterium, was severely damaged when heat-shocked in the presence\ud of nutrients. Thermally induced leakage materials from cells tested\ud for in the medium.

The investigation of thermally induced stress gradients and, based on this analysis, low-cycle fatigue tests with superimposed temperature gradients were conducted. Linear elastic finite element studies were performed to calculate the local stress-strain field and the service life of the test specimens.

Thermally induced leakage from Vibrio marinus, an obligately psychrophilic marine bacterium. J Bacteriol. Nov; 92 (5)– [PMC free article] Iandolo JJ, Ordal ZJ.

Repair of thermal injury of Staphylococcus aureus. J Bacteriol. Jan; 91 (1)– [PMC free article] Malcolm NL. Molecular determinants of obligate psychrophily.

Psychrophilic Bacterium. psychrobe, thermophobic bacteria, facultative psychrophile, obligate psychrophile, and psychrotrophic. A review of the literature indicates that the organisms described were actually psychrotrophs (as defined previously) with the possibility of one psychrophilic exception.

These thermally induced damages to the. CiteScore: ℹ CiteScore: CiteScore measures the average citations received per peer-reviewed document published in this title. CiteScore values are based on citation counts in a range of four years (e.g.

) to peer-reviewed documents (articles, reviews, conference papers, data papers and book chapters) published in the same four calendar years, divided by the number of.

matrix composites. The objective of this investigation was to determine the viability of implementing alternate substrate materials for packaging of LED power chips. In particular, thermally induced stresses resulting from the CTE differentials between the alternate substrate materials and the LED sub-mount material were analyzed and compared.

Thermal Analysis Characteristic: Thermal properties: Morphological change Melting points, glass transition (Tg), crystallinity, thermal history, nucleation, enthalpy of fusion or re-crystallisation, specific heat capacity (Cp) Dimensional change Coefficient of thermal expansion (CLTE), shrinkage data, anisotropy due to fillers, reinforcing.

The discovery of stress-induced electrolyte (K +) leakage. The first measurements of the leakage of electrolytes from freezing- and wounding-treated plants were carried out almost a hundred years ago (Osterhaut, ; Dexter et al., ). These original studies suggested that the electrolyte leakage is related to membrane damage causing cell.

Thermal characteristics, such as diffusivity and temperature induced change in the fiber mode index of rotation sensing fiber coil are critical factors which determine the time varying, thermo-optically induced bias drift of interferometric fiber-optic gyroscopes (IFOGs).

In this study, temperature dependence of the transient effect is analyzed in terms of the thermal characteristics of the. The thermal non-leakage probability is for large reactor cores about – and this value is minimally affected (in comparison with the other factors) by operational changes except changes in the moderator only parameter, that influences the thermal non-leakage probability is the moderator temperature.

It can be derived from the neutron diffusion theory, the probability. Effect of induced thermal stresses on the coefficients of thermal expansion and densities of filled polymers. Wang. Bell Telephone Laboratories, Incorporated, Murray Hill, New Jersey Search for more papers by this author.

Kwei. Keywords: Carbon Steels, fatigue, thermal cycling, Stress, as-received materials. DEFINITION OF TERMS As-received material means the low carbon steel used in this research.

Thermal cycling is the alternate heating and cooling of a material. Low frequency thermal cycle is the one in which the time taken for completion of the cycle is. R.D. Haight and R.Y. Morita, Thermally induced leakage from Vibrio marinus an obligately psychrophilic marine bacterium, Journal of BacteriologyThis paper expands on the impact of the thermally induced deformation of the soil on the serviceability mechanical performance (i.e., deformation-related) of energy pile groups.

The work is based on the results of a full-scale in-situ test that was performed on a group of energy piles at the Swiss Tech Convention Centre, Lausanne, Switzerland, and on a series of 3-D thermo-mechanical finite. Makarios-Laham and Levin, R. Thermally-induced leakage and death of a psychrophilic marine bacterium of fish origin.

Microbios. Kim, J. and Levin, R. Mechanism of caffeine repression of mitomycin C induced reversion in. Pressure (P) derivatives of thermal conductivity (k) and thermal diffusivity (D) are important to geophysics but are difficult to measure accurately because minerals, being hard and partially transparent, likely incur systematic errors through thermal losses at interfaces and spurious radiative transfer.

To evaluate accuracy, repeat experiments for olivine [(MgFe)2SiO4], quartz. DmxA from the psychrophilic bacterium Marinobacter sp. ELB17 displays the highest catalytic efficiency of all HLDs found in the marine environment with k cat /K M = s −1 mM −1 with 1,3-dibromopropane (Chrast et al., ).

The kinetic mechanism of DmxA with 1,3-dibromopropane is complex and involves positive cooperativity and partial. expands and the thermal tensile atresses are counteracted. The stress reversal takes place earlier than otherwise.

At the time t2 the core transforms which causes another stress reversal. After cooling transformation induced tensile stresses at the surface dominate over the thermally induced compressive stress.

recommends a thermal cycle in the range of 0°C to °C. Within a temperature range, the dwell, heat and cool down rates are critical parameters and also affect cycles to failure.

The NASA thermal cycling requirements are stringent and are specified in various revisions of NASA Handbooks. For example, in a previous revision, NHB (3A-1).Thermal Analysis This guide starts from applications of thermal analysis and its role in simulation driven design.

Fundamental concepts and principles will be introduced such as conduction, convection, radiation, linear and nonlinear heat transfer, steady state and transient analysis, etc.Role of Thermally-Induced Buoyant Flow in Altering Energy Harvesting Using Geothermal Piles Geotechnical Frontiers Geotechnical Materials, Modeling, and Testing March Centrifuge Modelling of Tunnelling beneath Axially Loaded Displacement and Non-Displacement Piles in Sand.

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