The atmospheric transport and deposition of semi-volatile organic compounds (SOCs), including current and historic use pesticides, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), to mountain ecosystems may result in the exposure of tadpoles to these SOCs. This exposure has been implicated in amphibian population declines in California. Tadpoles encounter...
The opportunistic pathogen Pseudomonas aeruginosa possesses two LuxR-LuxI
type quorum-sensing systems that use diffusible acyl-homoserine lactone molecules to
autoinduce and coordinate expression of multiple virulence factors. We conducted a highthroughput
screen for mutants deficient in skim-milk proteolysis—a quorum-sensing
dependent phenotype—using a nonredundant transposon-insertion library representing
most nonessential genes in P....
This thesis is comprised of a manuscript based on a laboratory experiment run in the Tsunami Wave Basin as part of a research project funded by the Network for Earthquake Engineering Simulation called Housesmash. The purpose of the experiment was to better understand the role of the urban environment, represented...
A brief presentation on a few of the ways that Oregon State University Libraries utilize ILL data to help make collection development decisions. This presentation was a part of the ALA STARS preconference: ILL Data Storm - Practical Assessment.
Background: Spina bifida (SB) is the most common birth defect, affecting approximately 1 to 2 in 10,000 live births. SB is a complex disability with many associated, secondary, and chronic conditions that require lifelong medical care. Individuals with spina bifida (SB) are living longer with advances in medical care, and...
Analytical methods capable of trace measurement of semi-volatile organic
compounds (SOCs) are necessary to assess the exposure of tadpoles to contaminants as a
result of long-range and regional atmospheric transport and deposition. The following
study compares the results of two analytical methods, one using pressurized liquid
extraction (PLE) and the...
Full Text:
Measurement of Semi-Volatile Organic Compound Accumulation in 25
Tadpoles 26
27
KerriStanley,† Staci
A method is presented in this study for improving
empirical travel cost analyses when truncated data are
available. The analysis expands upon a Monte Carlo study
conducted by Riyadi (1993) which compared the coefficient
and consumer surplus estimates for five travel cost
estimators using both truncated and censored data. Riyadi...
Analytical methods capable of trace measurement of semi-volatile organic
compounds (SOCs) are necessary to assess the exposure of tadpoles to contaminants as a
result of long-range and regional atmospheric transport and deposition. The following
study compares the results of two analytical methods, one using pressurized liquid
extraction (PLE) and the...
Analytical methods capable of trace measurement of semi-volatile organic
compounds (SOCs) are necessary to assess the exposure of tadpoles to contaminants as a
result of long-range and regional atmospheric transport and deposition. The following
study compares the results of two analytical methods, one using pressurized liquid
extraction (PLE) and the...
Analytical methods capable of trace measurement of semi-volatile organic
compounds (SOCs) are necessary to assess the exposure of tadpoles to contaminants as a
result of long-range and regional atmospheric transport and deposition. The following
study compares the results of two analytical methods, one using pressurized liquid
extraction (PLE) and the...
The faculty and staff at Oregon State University Libraries and Press made a conscious decision in 2011 to proactively set expectations for civil behaviors of those that work in and make use of the library. We wanted to make sure we maintained a safe work and study environment. Influencing factors...
Full Text:
1
Civility Commi
ee roster:
Kerri Goergen-Doll, Resource Acquisi�ons and Sharing
The faculty and staff at Oregon State University Libraries and Press made a conscious decision in 2011 to proactively set expectations for civil behaviors of those that work in and make use of the library. We wanted to make sure we maintained a safe work and study environment. Influencing factors...
Full Text:
://www.flickr.com/photos/ruminatrix/3755296805/ “Words must
become reality.”
Start out with a bit of soapboxing
The faculty and staff at Oregon State University Libraries and Press made a conscious decision in 2011 to proactively set expectations for civil behaviors of those that work in and make use of the library. We wanted to make sure we maintained a safe work and study environment. Influencing factors...
Storage of water for water quality control is one of the alternative
means of achieving water quality objectives. Authorities in
the field of water quality management disagree regarding the use of
precious water for the dilution of wastes.
The costs of achieving water quality objectives by treatment
of wastes at...
Low bone mineral density (BMD) and poor stability both contribute to
increased risk of fractures associated with a fall. The aim of this dissertation was
two-fold. The first study, a cross-sectional analysis, sought to determine the
anthropometric and/or performance variables that best predicted BMD and postural
stability in mature, premenopausal...
Antimicrobial agents are being increasingly used in consumer soaps and detergents, despite a lack of data demonstrating their efficacy in such products. This study investigated the nature of the interaction between different crystalline structures of titanium dioxide nanoparticles and BTC, and explore which structure, if any, could be best used...
Better Bones and Balance (BBB) is a community-based exercise program to improve bone health and reduce fall risk among older adults. Prior research has shown that when the program is delivered by researchers under controlled conditions, participants improved strength and balance, and maintained bone mineral density (BMD) at the hip....
:
______________________________________________________________
Katherine B. Gunter
Better Bones and Balance (BBB) is a community-based exercise program to
Contaminants used at low elevation, such as pesticides on crops, can be transported tens of kilometers and deposited in adjacent mountains in many parts of the world. Atmospherically deposited organic contaminants in the Sierra Nevada Mountains of California, USA, have exceeded some thresholds of concern, but the spatial and temporal...
A significant proportion of the population of the United States suffers from chronic pain, a category of disease that is not yet well understood by healthcare professionals. A majority of this group is made up of women; individuals who often have to convince healthcare professionals that their symptoms are real...
Purpose: The purpose of this study was to determine statistically the
effects of an automated science curriculum on the science learnings
of eighth grade students. This curriculum involved the use of
Keysort cards as a flexible handbook for teachers and included in
the directions for use a teaching method which...
The purpose of this study was to statistically evaluate the
influence of student placement at reading level by means of an informal
reading inventory in one kind of elementary science materials. The
materials were written at five levels of reading difficulty to better
meet the reading ability spread found in...
The purpose of the study was to prepare and statistically
evaluate a series of 11 history of science case studies designed to
teach the following abilities involved in scientific thinking:
1. Recognizing problems, hypotheses, experimental conditions,
and conclusions.
2. Understanding the relationship of evidence to hypotheses.
3. Understanding experimental conditions...
This investigation was designed to provide information about
applicants to Academic Year Institute Programs at Oregon State
University.
The study involved both acceptees and rejectees for the 1957-58, 1958-59, 1959-60, 1961-62, and 1962-63 Academic Year Institutes.
Only acceptees for the 1960-61 year were included. The population
for the study included...
In the majority of the less developed countries the small-scale
peasant agriculture is the dominant sector of the countries' economies.
The successes of major agricultural programs in order to increase the
potentials depend primarily on the understanding of the economic organizations
of the peasant households.
This study analyzed over a...
Atrazine (ATZ) is a selective triazine herbicide used primarily for pre-emergent weed control in corn, sorghum and sugar cane production. It is one of the most widely used herbicides in North America. Some research published over the last decade suggests that chronic exposure to environmentally relevant ATZ concentrations can adversely...
Response of aquatic vertebrates to increased pool habitat complexity due to abundance of large wood was evaluated experimentally in three streams in the Cascade Mountains of Oregon. No difference in aquatic vertebrate density was detected among treatments, though there was a trend of increasing aquatic vertebrate density with increasing large...
Spatial, diel and seasonal variations in dissolved oxygen and
temperature were measured in Triangle Lake, Oregon. Spatial dissolved
oxygen and temperature variations measured in the stratified
lake are presented to illustrate the horizontal uniformity of the lake
and to demonstrate the applicability of the one dimensional assumption
for sampling and...
Local aquatic insect diversity and community structure is the result of multiple local and regional factors, and observed patterns depend upon the spatial and temporal scale under examination. Isolated stream systems in arid regions represent a new challenge in understanding the drivers of diversity and community structure, as most studies...
The pea crab Fabia subquadrata is frequently found as a symbiont
of mussels, living within the mantle cavity. This study examined
the nature of this symbiotic relationship by recording the pattern
of distribution of individuals in a mussel bed, testing responsiveness
to host secretions, and observing the feeding mechanics and...
Knowledge of the viruses which are mechanically transmitted
from pear to herbaceous plants and the diseases they cause in pear
is not complete. This thesis discusses the means used to mechanically
transmit pear viruses, the properties of those viruses and their
relationships with latent viruses of apple.
Herbaceous plant virus...
The avifaunal composition of ten western Oregon forest stands located at the eastern base of the Coast Range was examined on a seasonal basis. The stands were dominated by Oregon white oak, Douglas fir or western hemlock, Avian populations were sampled monthly from January 1968 to January 1970, using permanent...
Farmers in the high plateau region of Algeria are
assumed to exhibit risk averse behavior, particularly, due
to highly variable weather conditions inducing income
instability over time. This in turn directly affects their
production behavior. The Eastern High Plateau (Setif) is
not a homogeneous region. In the El-Eulma daira, for...
The purposes of this investigation were twofold:
1. To determine important criteria for making a selection of
course content in general biology.
2. To ascertain what should be the content emphasis in
biology for the purposes of general education at the freshman
college level.
The literature pertinent to the problem...
Supervised exercise interventions can elicit numerous positive health outcomes in
breast cancer survivors. However, to maintain these benefits, exercise needs to
continue long after the supervised program. This may be difficult, as in this
transitional period (i.e., time period immediately following a supervised exercise
program), breast cancer survivors are in...
The purpose of this investigation was to determine if the level
of aspiration procedure consisting of knowledge of results plus goal-setting
possesses a motivational property as reflected in performance
on subject matter criterion instruments above that of knowledge of
results alone in an undergraduate biology course. In addition the
study...
Purpose of the Study
In most liberal arts colleges, the majority of students enrolled
are primarily interested in a liberal education. To meet the requirements
of its students, several colleges have introduced a relatively
new program in the sciences; this program is the integrated
science course. This study attempts to...
Conceptually, the dynamics of wood in streams can be viewed in terms of input and in-channel processes. Input processes are associated with both the riparian (tree fall, bank cutting, windthrow) and upslope forests (mass failures). In-channel processes include log breakage, movement, and decomposition. A mechanistic view of these processes is...
Understanding food webs is fundamental in conserving endangered species and maintaining healthy ecosystem function, particularly in desert spring systems. We identified dominant energy sources in the Muddy River Warm Springs area, Clark County, NV using carbon and nitrogen natural abundance stable isotope analyses. We examined isotopic signatures of specific macroinvertebrate...
Field studies indicate that accumulation of finely divided organic
debris in the channels of mountain streams after clearcutting may be
responsible for subsequent reduction in the dissolved oxygen concentration.
The purpose of this study was to quantify the biochemical
oxygen demand (BOD) of Douglas-fir needles and twigs, western
hemlock needles...
The major purpose of the study was to determine whether
science process achievement tests could be developed for administration
to groups of primary grade students. Six Basic Science Process
Tests (BSPT) were constructed as samples of the format proposed.
Each BSPT was designed to assess one of the basic science...
Visual estimation techniques were used to quantify habitat characteristics,
habitat type (pool, riffle) use and longitudinal distribution of steelhead
(Oncorhynchus mykiss), cutthroat trout (0. clarki), and coho salmon (0. kisutch)
in spring, summer and fall in 8.8 km of Cummins Creek, a basin in the central coast
of Oregon. Fish...
The purpose of this investigation was to evaluate the effects of
a six week residential summer program of differential education for
gifted high school students. It was designed to determine the extent
to which participants in the program were proficient in aspects of
critical and creative thinking, and in the...
The purpose of this study was to test, by means of
a controlled classroom experiment, the effectiveness of
an experimental method involving the introduction of
regular dictation of unpracticed material beginning with
Lesson 25 in the Gregg Shorthand Manual Simplified,
Second Edition, by Gregg, Leslie, and Zoubek.
The study involved...
El Salvador's land resources are intensively cultivated.
Labor is relatively abundant and wages are low. This study
analyzed the effects of government policies and observed farm
price distortions on enterprise/weed control system choices
and associated income-employment effects.
A regional linear programming framework was employed to
analyze the effects of alternative...
Full scale test roads combined with a theoretical analysis were
used to evaluate the benefits of incorporating a fabric as a base course
support material for gravel paved roads.
One material, a synthetic, nonwoven, polypropylene fabric was
used in this investigation. This fabric was used on top of the subgrade...
A satellite-derived Climatology of Global Ocean Winds (COGOW) on a 0.5° latitude by 0.5° latitude grid is presented based on 5-years (August 1999 July 2004) of measurements from the SeaWinds scatterometer that was launched on 19 June 1999 onboard the QuikSCAT satellite. SeaWinds is an active microwave radar that estimates...
For the past six years a bacterial infection has been the cause
of large losses of adult, spawning, American shad (Alosa
sapidissima) in the Coos, Millicoma and Smith Rivers of Oregon.
There was a sizable commercial fishery for shad in these rivers
and losses of fish due to this infection...
The demand for transistor circuitry to perform within more
exacting specifications has created the need for a method to accurateIy predict transistor circuit performance. A method utilizing an
electronic digital computer for the analysis of direct-coupled transistor
amplifiers is explained in this paper.
The dc bias levels and the mid-band...
A major problem confronting farmer cooperatives merging
for the first time is the lack of valuable experience that a prior
merger would have provided. This lack of experience results in
a decision making environment of imperfect knowledge, both of
the necessary postmerger activities to be performed and the timing
of...
This thesis develops a model for locating field offices for the
Motor Vehicles Division of Oregon. The locations are determined by
minimizing the total cost to the Public. This is reasonable because
the Public finances the operation and the opening of the offices
through tax dollars, and it bears the...
The ³²P material balance method for measuring periphyton production and grazing rates on periphyton in streams developed by Elwood and Nelson (1972) was evaluated by laboratory and field experiments. Three basic assumptions of the method were examined: 1) sloughing of periphyton from substrates is negligible, 2) sorption of ³²P onto...
An advanced laboratory interfacing capability was developed
for the Real-Time Digital Computer Laboratory in the Chemical
Engineering Department. A stationary interfacing unit located
beside the computer mainframe and two small remote units were
designed, developed and thoroughly tested. These interfacing
units permit experiments with a wide variety of analog and...
The stages in the life history of the parasitic copepod Nectobrachia
indivisa Fraser, 1920, have been described.
The adult female lives permanently attached to the gills of the
starry flounder, Platichthys stellatus (Pallas, 1811) Girard, 1854.
The adult male is a dwarf, which usually lives attached to the genital
process...
This investigation was undertaken to observe possible changes
in growth substances in Pyrus throughout the dormant period. The
primary objective was to determine if a correlation existed between
growth substance content and the inherent chilling requirement of
seeds and buds.
Samples of whole buds were taken at intervals from the...
Oregon College of Education (OCE) is a small, liberal arts college with a special emphasis on the preparation of teachers. Its student population is predominantly from Oregon's Willamette Valley area. OCE developed specific objectives for its teacher education program and the purpose of this study was to determine whether the...
The use of chemicals such as the triazines (especially atrazine) and mixtures of the triazines and 2,4-D or 2,4,5-T has become almost standard practice in some parts of the world for selectively controlling grasses and other herbaceous weeds to conserve moisture for and/or prevent the smothering of newly-planted conifers. In...
It was the intent of this investigation to compare the performance
of community college students to four-year institutional students, both
of whom were enrolled in a college general biology program (GS 101,
102, 103) during the 1967-68 academic year. During the week of
May 27, 1968 measurements were taken of...
This study was designed to reveal the outcomes of participation
in science project activities such as Science Fair projects among
ninth grade science students in Multnomah County, Oregon, during
the second half of the 1963-1964 school year.
A stratified sample of five public schools was selected to participate in this...
Policy analysts designing programs to improve the
efficiency and expand the use of water in the irrigation of
farm lands often enlist benefit-cost analysis as a means of
assessing impacts and feasibility. While on-site comparisons
of costs and benefits are important factors in project
assessment, other dimensions such as risk,...
Although there is abundant scientific information regarding vitamin E and selenium deficiency disease in domestic poultry, there is only scant information on exotic species, such as ratites. Several necropsy cases involving ostriches, emus and rheas were presented to the Oregon State University Veterinary Diagnostic Laboratory with gross and/or histologic lesions...
Culverts and road crossings potentially create barriers that impede or prevent
movement and migration of all life stages of resident and anadromous fish. There
have been very few studies of juvenile salmonid movements through retrofitted
(baffled) culverts in the field. Two separate studies were conducted to assess
juvenile cutthroat trout...
In the Pacific Northwest, regulatory agencies have recently
implemented management strategies for restoration and maintenance of wood
recruitment to streams over time. This allochthonous organic material is a
critical component in the geomorphic and biological structure of forested
streams. Mathematical models are commonly used to evaluate long-term
wood dynamics in...
This study was designed to evaluate the relative effectiveness
of a new college general biology course which utilized an audio -
tutorial laboratory as contrasted with a traditional lecture course.
Five biology classes with 720 students at the Kansas State
Teachers College in Emporia, Kansas, participated in the study.
The...
I compared hand sampling, two-pass multiple removal sampling, mark-recapture and catchability-based population estimates for the Pacific giant salamander (Dicamptodon tenebrosus) at 22 sites in 11 streams of Cascade Mountains of Oregon. Mark-recapture and catchability-based population estimates were not significantly different (p 0.86). Hand sampling and two-pass multiple removal population estimates...
The purpose of this study was to statistically evaluate one kind
of new elementary science curriculum materials. The materials;
(1) are written at five reading levels to partially meet the reading
ability spread found in the intermediate grades, (2) provide ways to
stimulate class discussion, and (3) provide three levels...
The purposes of this study were threefold: (1) to formulate a
current list of biological principles to use as a checklist in this study;
(2) to utilize the formulated checklist in identifying those principles
required for reading comprehension of news articles concerning the
various areas of biology or biology-related social...
This investigation was designed to measure certain visually
perceived nonverbal behaviors of teachers in an effort to learn the
relationships between these behaviors and the affective responses of
students to the teachers, To this end, teachers were videotaped, and
the tapes were shown to students for their affective responses.
Thirty...
Land use alters the physical and biological structure of stream ecosystems and potentially alters their capacity to process nitrogen (N), an essential nutrient that has nearly doubled in abundance on the biosphere
during the past century from human activities. In this dissertation, I quantified uptake and transformation of nitrate (NO₃⁻)...
This investigation was designed to determine the extent to
which students who are completing planned curricula in science education
are proficient in aspects of critical thinking, and possess
understandings of science consistent with those of the practicing
scientist. The effects of science curricula upon the development of
these abilities and...
This investigation was designed to analyze change in critical .
thinking between students in laboratory-centered and lecture-demonstration-centered patterns of instruction in high school biology.
Twenty biology classes were randomly selected from the four
senior high schools in the Salt Lake City School District. Class enrollment
ranged from nine students in...