This is the first report on the susceptibility of salmonid fish to infection with the glochidia of the freshwater mussel Margaritifera. margaritifera using known numbers of parasites under controlled conditions. The relative susceptibility of six species of salmonid fish, 2O to 80 mm in total length, to glochidiosis was determined...
The amine extraction process is evaluated for pulse column
operation. A 0.1 M solution of Primene JM-T (a commercial mixture
of tertiary-alkyl primary amines) in a kerosene-base diluent is
the extractant for thorium feed in aqueous acidic sulfate solutions.
Equilibrium isotherms at room temperature are presented at
aqueous acidities of...
This thesis presents two related studies on the methodology for creating, and
subsequently analyzing, an inverse food web model of an intertidal seagrass bed. The first study (Chapter 2) describes, for the first time in the literature, a method for incorporating isotopic information gained from Bayesian mixing models into an...
The purpose of this study was to determine a student's attitudes toward
business, his level of occupational aspiration, and the degree of correlation
between them. Two questionnaires were used: Student Attitudes Toward Business
and Level of Occupational Aspiration.
The business attitude questionnaire elicited student reactions to 87
business-related statements. The...
Nitrogen is a contaminant of niobium and tantalum adversely
affecting the workability of the metal. With recent interest in the
refractory metals, one problem the chemical analyst must solve
is the accurate determination of nitrogen in niobium and tantalum
at very low levels. The usual method of assaying for nitrogen...
This study was designed to measure the results on public
school teachers of training in three teaching systems. The results
of the study were intended to provide evidence that might be used
for designing a single system which would bring together the most
effective aspects of each of the systems...
Physical, chemical and bacterial water quality parameters of
the upper Wallowa River were sampled periodically between July 2,
1978 and June 9, 1979 at nine stream and lake sampling sites. Water
upstream from Wallowa Lake was typified by low nutrient concentrations
( generally below detectable limits except for nitrates), low....
Tansy ragwort (Senecio iacobea) is a widely distributed weed in the Pacific Northwest (U.S.A.) where it causes severe damage to the livestock industry. Sheep are highly resistant to toxic effects of ragwort, therefore, induction of ragwort preference in sheep was sought as a means to control this poisonous plant. The...
Callipyge (CLPG, n=16) and normal (N, n=11) lambs were
produced from Polypay dams and Dorset sires heterozygous for
the CLPG gene to study the effects of the gene on growth and
carcass and meat quality parameters. CLPG lambs had higher
average daily gain than N lambs (0.26 vs 0.23 kg/day,...