Summer movements of female moose at high density

Thesis (M.S.) University of Alaska Fairbanks, 2005I examined factors influencing the summer movements of adult female moose (Alces alces gigas) at high density in interior Alaska, USA from 1996 to 2003. First, I tested how the distance moved from 4 to 0 days pre-partum was related to migration, change in cover use, reproductive maturity and individual behavior. Second, I evaluated whether long movements prior to parturition were related to predation on previous neonates. Third, I measured the scale of spatial fidelity exhibited by individuals to areas used in early spring (13 to 15 May) and areas used for parturition. Lastly, I compared summer movements of adult females during periods of low and high population density. Net movement of females 4 to 0 days prior to parturition was related to migration and a change in cover use. Movement was not related to reproductive experience, individual behavior, or prior predation of neonates. Pre-partum movements were longest for moose moving from open to dense cover. Individuals displayed higher fidelity to areas used in early spring (13 to 15 May) than to areas used for parturition. This predictable use of fine-scale areas may facilitate effective management of forage quality in early spring.Spring movements and spatial fidelity of maternal moose -- Restricted movements of Alaskan moose at high versus low population density -- General conclusions -- Literature cited

Carbon isotope fractionation during aerobic biodegradation of trichloroethene by Burkholderia cepacia G4: a tool to map degradation mechanisms

The strain Burkholderia cepacia G4 aerobically mineralized trichloroethene (TCE) to CO2 over a time period of similar to20 h. Three biodegradation experiments were conducted with different bacterial optical densities at 540 nm (OD(540)s) in order to test whether isotope fractionation was consistent. The resulting TCE degradation was 93, 83.8, and 57.2% (i.e., 7.0, 16.2, and 42.8% TCE remaining) at OD(540)s of 2.0, 1.1, and 0.6, respectively. ODs also correlated linearly with zero-order degradation rates (1.99, 1.11, and 0.64 mumol h(-1)). While initial nonequilibrium mass losses of TCE produced only minor carbon isotope shifts (expressed in per mille delta C- 13(VPDB)), they were 57.2, 39.6, and 17.0parts per thousand between the initial and final TCE levels for the three experiments, in decreasing order of their OD(540)s. Despite these strong isotope shifts, we found a largely uniform isotope fractionation. The latter is expressed with a Rayleigh enrichment factor, E, and was -18.2 when all experiments were grouped to a common point of 42.8% TCE remaining. Although, decreases of epsilon to -20.7 were observed near complete degradation, our enrichment factors were significantly more negative than those reported for anaerobic dehalogenation of TCE. This indicates typical isotope fractionation for specific enzymatic mechanisms that can help to differentiate between degradation pathways

Alloying of Surface Layers of the Fuel Claddings from Sponge Based E110 Alloy to Increase High Temperature Oxidation Resistance

The results of experiments of parts of cladding tubes from sponge based zirconium E110 alloy near-surface layers doping by means of ion-plasma technologies are presented in this paper. Alloying of material by method of pre-deposited Fe, Y, Mo, Al, Mg, Cr films ion mixing is performed on installation ILUR-03 by means of radialAr+ion beam 3-4 keV average energy. State of modified material layer and oxides, grown on the modified samples in argon-water steam mixture at 1200 ∘C studied by scanning electron and ion microscopy methods, X-ray analysis and secondary ion mass spectroscopy. It is shown that treating modes defined contribute to the barrier for oxygen penetration and material oxidation formation near ion-doped surface

Commentary on the Visit to Burkina Faso The World Bank

DRAFT REPORT FOR COMMENT to Mr. Craig Andrews, The World Bank, industry and Mining Division, Industry and Energy DepartmentThis report is a commentary summarizing in Appendix 1 through IO the information which% has been obtained in the 2 days prior to departing to Burkina Faso, during the various meetings held, while on site and after the return. The terms of references which were defined for the project (Appendix 10) can not be satisfactorily addressed, given the time frame of the visit and the limited funds available

A feasibility investigation of the potential use of the "Chara process" and indigenous biota as passive polishing agents for cyanide in waste liquors at Arvida / for D.O. Johnson, Alcan International Ltd., Kingston Laboratories

Report examines the potential use of indigenous algal-bacterial flora and/or Chara as passive polishing agents for the removal of cyanide from Arvida waste waters

The application of ecological engineering for close-out at Buchans : final report /prepared for Mr. George Neary, Joint Venture Group at Buchans NFLD., ASARCO INC. - Abitibi-Price Inc.

Report provides information pertaining to the use of the ARUM process and ecological engineering at the Buchans mine. The report includes data from the Oriental pits, and the tailings pond