This dissertation focuses on the application of diatom frustules, the biosilica shell of an algae possessing physical and photonic properties capable of enhancing optical signals, for the enhancement of optical sensing. In this work, we incorporate diatom frustules into biosensors for signal enhancement and improved target molecule detection. The potential...
Proper nitrogen (N) management and variety selection are important for profitable hard red winter (HRW) wheat production in the dryland growing regions of northeastern Oregon. In these dryland systems, N management for grain yield and grain protein concentration (GPC) is challenging due to climatic and year-to-year variation in production environments....
The central purpose of this dissertation was to explore and expand the use of
an uniform electric field for orientation and for subsequent spectroscopic investigation of asymmetric polar molecules in the gas phase. The systems of study were nitrobenzene (NB) and the nitrotoluene (NT) isomers. We were able to quantitatively...
Non-vascularized hearts of buffalo sculpin (Enophrys bison)
were used to investigate the cardiac toxicity of compounds that
cause methemoglobinemia. The affinity of sculpin cardiac myoglobin
for oxygen (P50 = 1.10 torr at 20 C°, pH 7.8) was lower than that of
mammals studied (P50 = .44 and .76 torr for...
The movement to reform mathematics teaching and learning in schools began in the 1980s. After dedicating vast resources to support reform efforts since then, the transition to improve mathematics teaching and learning in schools has not occurred. In the majority of mathematics classrooms teachers still rely on traditional teaching strategies...
Sinks, plant organs which depend on the import of assimilates
for growth, play a central role in determining assimilate distribution
patterns within the plant. The strawberry fruit is a strong
sink for dry matter and its effect on carbon partitioning and
assimilation in the plant as well as the mechanism...
In animals, reproductive behaviors serve to attract individuals together during the
breeding season and to coordinate the behavioral and physiological states of individuals
so that mating can successfully occur. In snakes, the various reproductive behaviors
including courtship, mating, courtship inhibition, male combat and trailing are mediated
primarily by pheromones. Pheromones...
In horticultural nurseries for container-grown plants, production and sales have been threatened by the presence of a quarantined plant pathogen, Phytophthora ramorum (causal agent of sudden oak death). Infested nursery beds are an important source of P. ramorum, which can initiate disease through movement with surface water to infect roots...
Although many science educators and researchers believe that emotion is an important part of the learning process, few researchers have dealt with the topic in a systematic fashion. The purpose of this study was to examine the role of emotion in the learning process, particularly in the learning of science...