Using supercritical CO₂ (sCO₂) as a working fluid has increasingly gained attention in the energy industry. sCO₂ power cycles has various advantages, such as high cycle efficiency, compact turbomachinery, and potential zero CO₂ emission. Along with these benefits, materials degradation issues have also been emphasized in the last decade. Aqueous...
The influence of vesicular-arbuscular mycorrhizae (VAM) on
populations of general taxonomic and functional groups of naturally-occurring
rhizosphere bacteria and actinomycetes associated with
roots of sweet corn (Zea mays var. rugosa) and subterranean clover
(Trifolium subterraneum L.) was assayed using selective media.
Sporangial production by Phytophthora cinnamomi was also used as...
Dust deposition on ecosystems with highly weathered soils may provide vital rock-derived nutrients that maintain ecosystem productivity. Because of the difficulties in measuring temporally and spatially heterogeneous dust deposition over ecologically meaningful timescales, evaluations of the spatial variability in dust deposition are extremely rare. In the Luquillo Mountains of Puerto...
The advent of supercritical CO2 as a new heat-exchange medium has seen strong interest from the power industry and the energy research field recently. It is advan- tageous in comparison with other heat-exchange cycles, as it can be operated safely at much higher temperatures and pressures, thus increasing the thermal...
This thesis focuses on performances of masculinity by British Royal Flying Corps (RFC) airmen in the charged landscape of the First World War prisoner of war (POW) camp. I examine how captive airmen coped with imprisonment by reasserting the familiar homosocial communities of pre-capture squadron life, particularly through practices associated...
The purpose of this study was to examine the responses to a mail
survey of a random sample of female subjects (Ss), who at the time of the
study were members of the Oregon Public Employees Union employed as
clerical specialists by the State of Oregon, in order to: 1....
Ecosystem nitrogen (N) supply strongly influences the availability and cycling of other essential nutrients in temperate forests, especially calcium (Ca). Short-term additions of N that exceed ecosystem demands often increase dissolved nitrate fluxes and decrease soil pH, which can stimulate soil Ca loss. However, the long-term effects of high N...
Students are entering college heavier than ever before and some are gaining weight faster than the general population. Weight studies have been conducted, but are limited in scope about how behavior related choices are made. This study was an effort to determine weight stability and to explore the influences of...
The purpose of this study was to develop a marine bioassay
procedure using eggs and larvae of Pollicipes polymerus, a stalked
barnacle common on the west coast of North America.
A series of experiments were run to determine optimal culture
conditions for the eggs, to see if they could be...
Stephen Biko was a black leader in South Africa who
died in police custody on September 12, 1977. Biko's death
echoed within the Republic of South Africa and around the
world, showing that racial tensions in that country were
severe. At his death he was a hero to the black...