An investigation was conducted on factors influencing sex ratio in Eurytemora. Fifteen generations of brother/sister mating have produced family lines with a high proportion of either males or females of Eurytemora affinis. On this basis, a polygenic mechanism of sex
determination is proposed for E. affinis. Laboratory experiments on the...
Until recently, occurrence of milk fever (MF) has been attributed to prepartum calcium intake. However, researchers in Iowa have concluded that high prepartum dietary potassium (K) is the major cause of MF. Potassium concentrations have been increasing on manure fertilized soils over the last 20 years. Grasses grown on these...
The goal of these experiments was to ensile combinations of shrimp or crab waste
with perennial ryegrass straw and analyze it for silage quality and ruminal degradability.
The rapid deterioration of seafood wastes required initial preservation prior to ensiling
to minimize odor production and protein breakdown. Eight experiments were conducted...
Ice-penetrating radar produces detailed images of the internal ice layers in a glacier. Because the layers form from each year's snowfall, the curving of the internal layers is a record of the climate conditions that the glacier experienced as it flowed throughout the millennia. The Hiawatha Glacier lies on top...
The negative effects of poverty on childhood academic outcomes are well documented by current research. Children in poverty experience pronounced positive effects of familial involvement on these same academic outcomes. Unfortunately children in poverty experience low levels of familial involvement. Current familial involvement policy is centered in the school environment....
Excavation of a pit feature designated as Feature 59 (F59) from the Cooper’s Ferry site (10IH73) in western Idaho offers a unique opportunity to explore more about the Western Stemmed Tradition (WST) and how people used pits in the Far West. In this thesis, an analysis is conducted on the...
Pacific Coast band-tailed pigeons (Columba fasciata) have declined markedly
during the past several decades. Despite implementation of increasingly restrictive
hunting regulations, populations have shown minimal signs of recovery. I radio-marked
127 adult band-tailed pigeons in the central Oregon Coast Range in April-May of 1993-95
to document nesting chronology and productivity,...
This study explored the applicability of a small portion of Western
communication theory and practice to an Eastern culture. It compared
the opinions or professional judgments of five Thai speech instructors
who had obtained their doctorates in American universities with those of
five American speech instructors who hold doctorates in...
There are between one and two million
occurrences of head injuries in this country each
year causing an estimated 140,000 deaths. Fifty to
seventy thousand who survive are left with such
intellectual impairment as to preclude returning to a
normal life. The purpose of this study is to
investigate the...
Previous research has shown a gap between chemistry students' conceptual
and computational understandings of chemistry topics such as gas laws,
equilibrium, and reactions. This qualitative study examined the conceptual and
computational understandings of stoichiometry of college students enrolled in a
large lecture Introductory Chemistry course. Factors that might influence students'...
Microbial populations associated with the major substrates of the
canopy of a 70 m old-growth Douglas fir were studied to determine
potential activities. Seasonal samples from bark, foliage, epiphytic
moss, lichens, and litter accumulations were collected to i) obtain
population data, ii) to isolate the major groups of microorganisms
present,...
This study investigated the practices public and academic
library administrators find useful and utilize in analyzing
use of collections. The study also investigated
administrators' satisfaction with their collection use
analysis practices, and the impact they perceived automation
to have upon collection use analysis practices.
A survey developed for this study...
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Organization theory had seldom been applied to higher education
organizations but recent developments in organization theory appeared
to have potential for such application. No coherent theory of
educational change had been developed. However, one multidisciplinary
synthesis of literature on organizational change was congruent with
modern organization theory and contained both...
The loss of all deuterium labels from previous feedings of [2-²H]-,
[3,3-²H₂]-, and [2,3,3-²H₃]arginines had indicated the possible intermediacy
of β-hydroxy- and β-ketoarginine (30 and 31, respectively) in the
biosynthesis of the streptolidine portion of streptothricin F (la).
In order to confirm or refute this evidence, D,L-[2,3,3,5,5-²H₅]-
arginine (32) was...