This dissertation is divided into two major chapters. The first chapter covers the geologyof the Encuentro deposit with emphasis in the intrusion sequence, vein mineral assemblages and distribution, and age of mineralization. The data used for this section includes field mapping, petrography, elemental analysis of biotite, and isotopic geochronology. The...
Barley Yellow Dwarf Virus (BYDV) is a major disease of wheat. Unfortunately, unlike barley where the Yd2 gene provides adequate levels of resistance, the situation in wheat is more complex. This study was designed to provide information regarding: 1) evaluation of methods of measuring resistance among selected cultivars; 2) identification...
Oregon residents possess several options in installing solar photovoltaic (PV) systems. This study examines a range of options--tax credits and rebates, a volumetric incentive rate program, power purchase agreements from third-party installers, and solar leasing--and compares the cost of these options to not installing. The paper considers the problem of...
The purpose of this study is to determine factors that encourage second
generation Latina/os to obtain a community college education. A critical qualitative
ethnography focused on "Testimonio" was used in conducting this study. The key
findings were formulated around three critical research questions. In relation to each
research question, three...
Cyperus esculentus L. var. esculentus is a serious weed
problem in northwest Spain. Long-term control from glyphosate and
other herbicides has been inconsistent. Field, greenhouse, and
laboratory studies were conducted on factors influencing the
activity of glyphosate on C. esculentus.
In field studies, glyphosate controlled foliage growth at most
growth...
The object of this study is the synthesis of trans-cyclopentane-1, 2-dicarboxylic acid. Five procedures designed for the synthesis of
this trans diacid are described in the literature. The procedure
devised by Perkin in 1887, Fuson and Cole in 1938, and by Brenner
in 1961 were investigated to determine which of...
In this study, three main issues are discussed: possible bias
arising when inflation effects are neglected in engineering economy
studies, capital projects authorization forms which are not designed
to include inflation effects in the calculations,'and the introduction
of a new graphical technique for capital expenditure sensitivity
analysis.
Approaches are described...
I compare the seasonal abundance variation, population dynamics, fecundity, egg hatching mechanism and success, and apostome ciliate parasites of the euphausiids Euphausia pac?fica and Thysanoessa spinfera from the Oregon coast, USA. Community structure and nearshore distributions were examined from bi-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change...
Three experiments were conducted in broiler hens to study the influence of dietary n-3 polyunsaturated fatty acids (PUFA) on egg quality, antioxidant status in progeny, and eicosanoid production in tissue. The objective of experiment 1 was to determine the effect of hen age and dietary n-3 PUFA on egg quality...