In these tests, phenolic constituents from bark of Shasta red fir were found ineffective as stiffening agents for corrugating medium. Other means of application, however, may be effective.
Gum from inner bark of Shasta red fir was not so effective as a beater additive as was locust bean gum, but...
The rare earth elements (REEs) with their systematically varying properties are powerful tracers of continental inputs, particle scavenging intensity and the oxidation state of seawater. However, their generally low (similar to pmol/kg) concentrations in seawater and fractionation potential during chemical treatment makes them difficult to measure. Here we report a...
Italian ryegrass [Lolium perenne L. ssp. multiflorum (Lam.) Husnot] resistant to multiple herbicide sites of action continues to limit winter wheat production in western Oregon. In addition to impacting wheat production, multiple resistant Italian ryegrass may threaten the market for annual ryegrass seed for cover crops if wheat fields with...
Radiogenic isotopes of hafnium (Hf) and neodymium (Nd) are powerful tracers for water mass transport and trace metal cycling in the present and past oceans. However, due to the scarcity of available data the processes governing their distribution are not well understood. Here we present the first combined dissolved Hf...
The purpose of this study was to determine the need
for mathematics inservice training for untrained and
trained teachers in K-7 rural schools in Manicaland,
Zimbabwe. The auxiliary teachers do not have any
professional preparation before entry into the teaching
profession. The study sought to determine the mathematics
areas needed...
The omnivorous ground beetle, Pterostichus melanarius Illager (Coleoptera: Carabidae), is a ubiquitous inhabitant of western Oregon crop land. Because it is often the most abundant ground beetle, and attains densities that could lead to serious impacts on its prey sources, I sought to understand the overall diet composition, and specifically...
Teachers and administrators spend many hours of work reviewing
the State of Oregon Guidelines and drafting district guidelines in an
attempt to make the process of evaluation positive and productive.
Most districts agree the primary purpose of evaluation should be for
the improvement of instruction.
The amended state law, ORS...
This study was an investigation to determine the instructional
media competencies that inservice teachers of secondary education
teaching disciplines recommend for pre-service teachers in their
discipline.
A literature review focused on four main questions:
1. What historical events mark the development of the field
of instructional media?
2. What are...
Organizations leading education reform of the 1980's
have challenged teacher education programs at colleges and
universities across the nation to improve the subject
matter content preparation of teachers. Past methods of
program development and techniques to assess teacher's
knowledge competence have been one-sided in their
approach. New research studies on...
This study was designed to measure the results on public
school teachers of training in three teaching systems. The results
of the study were intended to provide evidence that might be used
for designing a single system which would bring together the most
effective aspects of each of the systems...
This study is designed to evaluate to what degree action at the household level in WUI wildfire preparedness is influenced by targeted public information, or behaviorally informed, interventions. The desired outcome of the public information interventions is increasing the number of households taking action to reduce wildfire risk through the...
Cover crop establishment in late-season crops, like sweet corn, may be difficult due to the relatively short operational window following crop harvest. In regions like western Oregon, where fall-precipitation can occur when the crop is still in the field, cover crops may not be able to be planted, due to...
The Willamette River Basin supports 70% of Oregon’s population and contains the richest native fish fauna in the state, (Hulse, Gregory, & Baker, 2002). The Basin is facing changes that stress its water management regimes. Is the Basin’s water management regime able to adapt in the face of these changes?...
Weed management in sustainable farming systems often requires the integration of several different pest management techniques. Cultural, biological, and chemical pest control efforts can be utilized to contribute to the common goal of reducing weeds in vegetable row crop systems. This research addresses how common disturbances such as tillage and...
Between 1900 and 1920 women were responsible for much of the social and
political activity in the United States. Recent work by feminist historians has revealed
that women were interested in a broad range of issues at the turn of the twentieth
century. The American Left addressed such issues as...
The purpose of this.investigation was to determine how enzymes and oxygen influence the role ascorbic acid has on pigment degradation and browning during storage for strawberry juice and concentrate.
The ascorbic and dehydroascorbic acid content of blanched and unblanched, nitrogen-treated and air-exposed samples of strawberry juice and concentrate was measured...
A high performance liquid chromatography (HPLC)
procedure using a LiChrosorb-NH₂ column and a eluant
buffer of 75:25 (v/v) of acetonitrile:0.05 M KH₂P0₄, pH
5.95, was developed for the successful separation and
determination of ascorbic and erythorbic acids in selected
food samples.
Application of the method, which is sensitive, rapid
and...
The concentration of ascorbic acid in the plasma was determined on
four levels of ascorbic acid intake for seven day periods in 1946-47 and
on three levels of ascorbic acid intake for ten day periods in 1947-48.
The subjects, eight girls and eight boys, were 16 to 19 year old...
Thirteen healthy adult males, ages 20-40, consuming self selected
diets, were given instructions to take one 500 mg tablet of ascorbic
acid three times a day with their meals for a period of ten weeks. The
effect of this daily supplementation on copper status was investigated.
An estimation made from...
1. The recommended allowance of the National Reasearch
Council, 100 mg ascorbic acid for the 18-year-old boys and 80 mg
for the 16 to 19-year-old girls, did not maintain mean plasma ascorbic
acid values at levels as high as the respective saturation means. For
the girls all the mean values...
Published December 1947. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Phospholipase C-β (PLC-β) isozymes are key effectors in G protein-coupled
signaling pathways. Prior research suggested that some isoforms of PLC-β may exist
and function as dimers, but little is known about dimerization of PLC-β. Data from coimmunoprecipitation
assays of differentially-tagged PLC-β constructs and sizeexclusion
chromatography of native PLC-β support homodimerization...
Ascorbic acid, or vitamin C, is well known as a co-factor for proline-hydroxylase and as an anti-oxidant. However, it is also capable of forming covalent bonds, particularly in the role of a nucleophile, henceforth termed 'ascorbylation'.
The ascorbylation of electrophiles can occur under physiological conditions. Furthermore, there are a number...
The purpose of this study was to determine whether one ear
of a profoundly deaf student could duplicate a response rate
similar to the response rate achieved by the opposite ear on an
auditory training program. The formal hypothesis of this study
was: a student that reaches criterion level of...
Summary
Irrigation effects on root rot and yield
Reducing irrigation during the first 6 weeks after planting reduced root rot of sweet corn at midseason and at harvest, consistent with findings of the past two years.
Reducing the early season irrigation level increased yield of Jubilee by 20%...
The objective of this research was to determine best use patterns for Upbeet herbicide considering factors of preemergence herbicide and cultivation, and how these affect optimum timing for Upbeet applied with or without Spin-Aid for control of weeds such as nightshade and lambsquarters.
At the May 19, 1982 meeting of the Governing Council of the
United Nations Environment Program, Kenya President Daniel Arap
Moi summarized a growing international feeling that there is a
need for non-governmental organizations (NGOs) to get more
involved in international conservation efforts with the following
statement:
"The issue before...
This compilation follows the Fifty-Seven-Year Index to the Sierra Club Bulletin annuals, 1893-1949, compiled by Dorothy H. Bradley and George Shochat and published by the Club in 1952. This index covers the monthly issues from 1950 through 1976 as well as the annuals, which were dated as monthly issues but...
Mitchell Marsh, a tidal salt marsh in the Salmon River Estuary, was diked in the
early 1960s. Restoration of the marsh, which began in late 1978, consisted of partial dike
removal. Several studies have been conducted in the marsh, addressing the status of the
developing salt marsh plant communities. Species...
The objectives were to evaluate crop safety and weed control with Reflex (fomesafen) applied to snap beans and Reflex and Spartan to edamame. Reflex caused very little injury to snap beans at two sites when applied PRE and only minor injury when applied EPOST. Tank mixes with Dual Magnum were...
SUMMARY
• Impact and Laudis herbicides were evaluated for wild proso millet and broadleaf weed
control in sweet corn.
• The most effective treatments were Impact and Laudis applied with Outlook and atrazine at
V2-3.
• Increasing the methylated seed oil (MSO) rate from 0.25% to 1 % was more...
More than half of students in Washington state community colleges enroll in developmental mathematics, but a relatively small percentage of these students persist to the second year. Many students place into these courses and never enroll; others enroll at some point after the first academic term, even when faced with...
The content of this Technical Report is related to: Peachey, E., Doohan, D., & Koch, T. (2012). Selectivity of fomesafen based systems for preemergence weed control in cucurbit crops. Crop Protection, 40, 91-97. doi: 10.1016/j.cropro.2012.04.003.
A generalized arithmetic package allows a programmer to think of numbers as abstract quantities, without regard to whether they are represented as integers, floating point values, fractions, complex numbers, or even polynomials. In this paper we describe two implementation techniques that can be used to produce a generalized arithmetic package...
Object oriented programming features information hiding and encapsulation, meaning that 1) each object hides the the implementation details tram access from outside and only a set of methods (interface routines) are visible outside of the object, and 2) changes to the implementation of the object do not require changes to...