Our responses are faster when the response key location is compatible with target location than when it is incompatible, even when target location was irrelevant to the task (the Simon effect). This effect is observed even when two people shared the task (e.g., one pressing the left key and the...
The effects of rise-time and frequency on the auditory brainstem
response were studied in six normal hearing adults. Stimuli were
high-frequency gated tone-bursts with center frequencies of 8, 10,
12, and 14 kilohertz (kHz). Examined rise-times were .1, .25, .5,
and 1.0 milliseconds (msec). Duration was maintained at 2 msec....
It has long been observed that stress can increase our
susceptibility to infectious diseases and cancers. Recent
experimental evidence suggests that this increased susceptibility is
due to suppression of immunity. A variety of neuroendocrine products
are released during periods of stress, and a large number of these
are now known...
Previous studies have shown that there are differences in taste responses between various regions of the tongue. Most of those studies used a controlled "passive" tasting mode due to the nature of investigation. However, food is rarely tasted in a passive manner. In addition, recent studies have suggested that humans...
Unconditioned responding (UCR) to a naturally aversive stimulus is associated with defensive responding to a conditioned threat cue (CS+) and a conditioned safety cue (CS-) in trauma-exposed individuals during fear acquisition. However, the relationships of UCR with defensive responding during extinction training, posttraumatic stress disorder (PTSD) symptom severity, and fearful...
In vivo generation of cytotoxic T cell activity
against alloantigen is suppressed by the aromatic
hydrocarbon (Ah) receptor binding 3,3',4,4',5,5'-
hexachlorobiphenyl isomer (HxCB). Previous studies in
this laboratory suggest that HxCB may alter early
event(s) in the activation of cytotoxic T lymphocytes
(CTL). Production of and response to interleukins 1...
Type 2 Diabetes Mellitus is a chronic metabolic condition that impairs insulin stimulated glucose absorption in skeletal muscle, a characteristic phenomenon denoted as insulin resistance. Lipid overload of the mitochondria is linked to the development of insulin resistance and the progression of Type 2 Diabetes. As lipids accumulate there is...
The immune systems of various teleost fish have been studied in some detail for
the past several decades. One aspect of fish immunity, that of endogenously produced
modulating factors, has recently received a great deal of attention. Understanding the
functions and roles of endogenous factors that regulate fish immunity is...
Three experiments were conducted to study the influence of dietary fatty acids on the production performance and immune response of chickens. In experiment I, forty day-old broiler chicks were fed diets containing 5% of either animal fat + conjugated linoleic acid (CLA) (Diet I), sunflower oil (Diet II), flax oil...
Tn5 mutagenesis of apdA (for antibiotic production) and deletion of
gacA (for global antibiotic and cyanide) resulted in the same pleiotropic phenotype in
Pseudomonas fluorescens (i.e. production of an array of secondary metabolites
including the antibiotics pyrrolnitrin, pyoluteorin, and 2,4-diacetylphloroglucinol as
well as a tryptophan-side-chain oxidase, hydrogen cyanide, and an...
The OSU Government Relations Office provides periodic updates that describe events in Washington, DC and Salem. These updates include insights on how budget and policy decisions at the state and federal level will affect OSU and are issued once or twice a month, depending on the level of activities in...
Bioelectric responses from the isolated eye of the purple shore
crab were measured by the electroretinogram with stimulation by
light from wavelengths of 250 to 800 nm, strontium-yttrium-90 beta
radiation, 17.5 keV x-radiation, and 3-cm microwaves.
Peak sensitivities to light stimulation were found at 350 and 500
nm. These peaks...
Due to a combination of misinterpretation and misleading illustration, the premise of a “tongue map”, which indicated that sweetness could only be detected at the front of the tongue and bitterness could only be detected on the back, became wide spread. In fact, all taste qualities can be detected on...
Incorporation of nanoparticles (NPs) into consumer products is on the rise and human exposure to NPs is unavoidable. Currently, there is insufficient data to assess the safety of nanoparticles. I conducted a series of five studies using the zebrafish model to determine which NP components (i.e., core material or surface...
State and federal aid payments to local governments have grown explosively over the last fifteen years. One reason for this growth is that the donor governments can alter a local government's budget choices through grants. Grants have not remedied social problems, however, because the local governments' responses to grants were...
Bee populations are declining around the globe, while the need for their pollination services is increasing with growing food demands by an expanding population. There is a need for innovative practices to increase pollination in agricultural environments without harming wild bee populations. However, the use of artificial visual attractants has...
The present investigation was designed to test two major hypotheses
and five sub-hypotheses. The two major hypotheses were:
(1) Parental models influence the shaping of children's responses to
frustration, and (2) There is a positive relation between parental
consistency in responses to frustration and children's imitation of
parental responses. Three...
The syllid polychaete Autolytus varius reproduces in the spring
and early summer in Yaquina Bay, Oregon, The fertilized female
epitokes, or Sacconereis, carry the developing eggs and larvae in a
ventral sac until the larvae are ready to be released; incubation
lasts 14 to 18 days in the laboratory, The...
The results of my research suggest that tadpoles of the Western
toad (Bufo boreas) and the Cascades frog (Rana cascadae) display an
alarm response to chemicals from injured conspecific tadpoles.
Furthermore, results suggest that the Bufo boreas alarm response can
be elicited by a natural predator when it feeds on...
Behavioral response studies provide significant insights into the nature, magnitude, and consequences of changes in animal behavior in response to some external stimulus. Controlled exposure experiments (CEEs) to study behavioral response have faced challenges in quantifying the importance of and interaction among individual variability, exposure conditions, and environmental covariates. To...
Mosquito-borne pathogens are the cause of important, often deadly diseases
worldwide; and, use of repellents is one of the components of mosquito control programs.
The most effective mosquito repellent is N,N-dimethyl-m-toluamide, known as DEET.
Speculation on the adverse effects of DEET have been on the rise since the 1980s, and...
The purpose of this study was to determine if male and female
Counselor-Trainees enrolled in master's degree programs in the
State of Oregon would emit significantly different responses to a
new and professionally developed video-based client simulation.
The sample consisted of ninety-two Counselor-Trainees
enrolled during the 1975-76 academic year in...
An increased metabolic efficiency may be a factor underlying the
onset and maintenance of obesity. This study examined the Resting
Metabolic Rate (RMR), the Thermic Effect of Food (TEF), the Thermic
Effect of Exercise (TEE), and the Potentiation (P) of the TEF by
Exercise in Juvenile-onset type obesity (JOTO), and...
Short durations in a range of standard durations are typically overreproduced and long
durations underreproduced (‘Vierordt’s Law’). This contextual distortion may result from each trial
assimilating the central tendency of the preceding series. We examine whether responses as well as
standard durations contribute to this distortion. Two experiments using nonequal-setting...
The purposes of this study were to investigate consumers' responses (aesthetic response, approach response, and perceived risk) to two types of visual merchandise displays (full size mannequin and flat hanging display) in an in-store retail setting. An interest for this study arises from retailers' constant effort to differentiate themselves from...
This paper presents a brief discussion on the phenomenon of exercise-induced insulin sensitization, including the effects of exercise on insulin-stimulated glucose uptake and potential mechanisms mediating these effects. Originally created for KIN 481 (Writing Intensive Curriculum course).
A study was conducted of the response of the garden symphylan,
Scutigerella immaculata (Newport), to naturally occurring chemicals.
Results of olfactometer studies with plant odors were inconclusive
because air currents in one olfactometer and the shape of another had
undesirable effects on symphylan behavior.
Non-random distributions of symphylans in chambers...
The effect of lifting date and root-pruning treatments on
water potential, root regeneration, and shoot growth of six-month-old
and three-year-old Douglas-fir seedlings bare-root transplanted
into a growth chamber, and sawdust bed, respectively, was studied.
Root growth in six-month-old and three-year-old seedlings was
highest in February and August respectively. Survival was...
Since 2007, electronic cigarette (e-cigarette) sales in the U.S. have surpassed those of tobacco cigarettes. This is due, in part, to manufacturer’s claims that they are a safer alternative to tobacco cigarettes. However, formaldehyde, acrolein, and diacetyl have been detected in e-cigarettes and public knowledge of e-cigarette composition and potential...
Sulforaphane is an isothiocyanate derived from cruciferous vegetables and has been under investigation as a cancer chemopreventive agent for over two decades. The compound is well tolerated and has been shown to slow cancer progression in several different pre-clinical models of carcinogenesis, such as of the lung, breast and colon....
Nanoparticles (NPs), defined as materials having at least one dimension (height, width, diameter) in the nanoscale, are increasingly being incorporated into a wide variety of products and are replacing traditional bulk materials in many applications. This is because they can be more efficacious, more sustainable, and can have unique characteristics...
Our view of phytoplankton has historically revolved around their inability to
control their location in space. The term phytoplankton itself underscores this
particular difference between phytoplankton and their sessile terrestrial counterparts.
Yet there are other differences between land plants and the phytoplankton that are
perhaps equally important, beyond this sessile-planktonic...
The death of a child is a traumatic family event. This qualitative study examined the experiences of parents and grandparents in 10 families who had lost a baby to SIDS, stillbirth, or birth defects. Key questions focused on support given and received, meanings attributed to the loss, continuing bonds, and...
In 2004 the National Toxicology Program published an article describing their intent to pursue toxicology testing and risk assessment practices solely reliant on high throughput in vitro datasets and in silico modeling for dose-response assessments. Support and contributions form regulatory agencies and a significant portion of the life sciences community...
Various aspects of the biology of the woolly pear aphid
Eriosoma pyricola were studied in order to further understand its annual
cycle. It was already known that. E. pyricola produces alate sexuparae
in response to the onset of dormancy in its secondary host, a pear.
This study of E. pyricola...
We hypothesized that vitamin E (α-tocopherol) is required by the developing embryonic brain to prevent depletion of highly polyunsaturated fatty acids, especially docosahexaenoic acid (DHA, 22:6), the loss of which we predicted would underlie abnormal morphological and behavioral outcomes. Therefore, we fed adult 5D zebrafish (Danio rerio) defined diets without...
In nature, animals survive threats by responding physiologically and behaviorally in ways that are appropriate to the situation. Which responses are appropriate depend on the animals' surroundings and current physiological and behavioral state. This dissertation investigated the neuroendocrine mechanisms that control context-dependent behavioral responses to stress by focusing on the...
A simple behavioral test was devised to determine the effects of multiple acute stresses on the avoidance response time of fish. Groups of freshwater-adapted juvenile chinook salmon Oncorhynchus tshawytscha were exposed to a sudden overhead light and the time it took each fish to reach cover was noted. Tests were...
The existing body of literature suggests that evoking emotions through design provides rich interactions. We tested Pleasure and Approach reactions of 111 participants towards two curvilinear and two rectilinear simulated interior settings. The curvilinear forms resulted in significantly stronger Pleasure ratings than the rectilinear forms. The circumplexes of emotions indicated...
Creating effective functions in website designs that reduce consumers' anxiety in shopping online is a challenge common to most e-retailers. The present study investigated the roles of online reputation systems and instant chat services in decreasing customer perceived risk and increasing initial trust in unfamiliar e-retailers. Therefore, the reputation system...