A series of studies was performed to more clearly evaluate gonadal function in llamas. Luteinizing hormone (LH) and progesterone (P₄) concentrations were compared following natural or hormone-induced ovulation. Luteal regression was evaluated following administration of the prostaglandin F₂α analog cloprostenol. The interaction of age, season and castration on testosterone (T)...
This manual provides guidance on creating subject heading proposals for Indigenous topics that can be submitted to the Subject Authority Cooperative Program (SACO) for addition to the Library of Congress Subject Headings.
Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko),
is a widely distributed species in western north America,
and a major economic pest of wheat (Triticum aestivum L.)
and barley (Hordeum vulgare L.). The objectives of this
study were to : 1) determine the inheritance of seedling and
adult plant resistances in...
The purpose of land use planning, as conducted by the Forest Service, is to allocate land uses. The techniques employed in the current planning process fail to take location of the land allocations into account in any systematic manner. The resulting solutions may be inconsistent with planning goals; the land...
This study was conducted to determine how the size and orientation of large
wood placed in streams in combination with peak flows, substrate and channel gradient
affect pool volume, surface area and maximum depth in two coastal Oregon streams.
Eighteen Douglas-fir (Pseudotsuga menziesii) logs were placed in each of two...
With rapidly rising health care expenditures, health care cost containment has
become a major issue facing this nation. A phenomenal growth in worksite health
promotion has occurred with the recognition that these programs have the potential to
reduce these costs. However, to be effective as a cost containment strategy, health...
Southeast Alaska is located on the traditional territory of the Lingít, Haida, and Tsimshian People. It is comprised of the largest temperate rainforest in the world, with subregions receiving over 500 cm of rain annually. Climate change is predicted to alter the region's timing, type, and magnitude of precipitation and...
Olympia oysters, “Ostrea conchaphila,” were once common along the west coast of North America. A popular delicacy, native oyster populations began to decline in the late 1800’s due to over‐harvest, degraded water quality, and habitat loss. Interest in re‐establishing the native oyster in a small Oregon estuary, Netarts Bay, culminated...
Bacterial contamination is one of the most important problems
both in plant tissue culture research and commercial laboratories. Early
detection of contaminants saves time, effort, and money. Strawberry
runner explants were screened for contaminants during June to August,
1994 and 1995. Most contaminants found were bacterial rather than
fungal. Bacterial...