More than 3700 fertilized toad eggs were used in a series of
studies designed to determine the effects of UV-B radiation (290-
315 nm) on temporal developmental patterns, systematic development
and viability prior to metamorphic climax. The eggs were
exposed to radiation from either "white-light" fluorescent lamps
(Vita-Lite, Duro-Test Corporation,...
Artificial substrates colonized by diatoms from Yaquina Estuary, Oregon, were exposed to solar visible radiation and three levels of ultraviolet radiation (UV-B, 290-320 nm). Flow-through microcosms were constructed inside a glasshouse to serve as chambers for the artificial substrates. The artificial substrates were sampled during three spring/summer experiments. Chlorophyll a...
Youth in foster care often perform at lower levels academically than those not in foster care. Prior research on the nature of the relationships that affect former foster youth's educational path has been inconclusive. Though it is widely believed that positive relationships with faculty, staff and peers is beneficial for...
This paper is devoted to the study of families of tangent lines
to curves in Euclidean three dimensional space by the medium of a
particular representation for lines.
First, a ring of elements called dual numbers is described,
and a vector space over this ring, whose elements are called dual...
Background: Previous studies suggested that the professional identity of community college faculty is less than clearly articulated. Lack of clarity with regard to professional identity may have impacts in a number of areas, including recruitment, professional development, and the overall reputation of community colleges.
Purpose: To examine how community college...
Given the current abundant supply and cheap price of natural gas (NG) in the United States, there is a significant opportunity to use this fuel for transportation. However, there are few fueling stations for consumers. To address this need, a dual-mode engine has been developed where in one mode all...
Phenetic relationships in insular populations of Lacerta sicula
and L. melisellensis correspond to geologic ages of the islands in two
regions of the Adriatic Sea. Populations of L. melisellensis on older
islands are more similar to populations of L. sicula than are L. melisellensis
from younger islands, and examination of...
The propagation characteristics of a new coupled fin line structure, with
asymetrical, rectangular, top and bottom housings, is evaluated by using the modal
analysis technique. The boundary Green's function of the structure, relating the surface
currents to the electric fields is derived by using this technique. The propagation
characteristics, i.e....
Despite the availability of distance education technology, Oregon
State University Extension Service educators have made limited use of
this equipment for delivery of educational programs to clients of the
state's 36 county Extension Service offices. Some Extension educators
may be hesitant to use distance technology because they are unsure
whether...
Numerous investigations have been made on the contribution of
butter cultures to the flavor of cultured cream butter, but production
of uniform cultured cream butter has not been possible in industry.
Therefore, it was desirable to investigate in detail the qualitative
and quantitative chemistry of the flavor of high quality...
Non-process elements are present in all kraft
recovery systems. Non-process elements are defined as
those elements which are not essential to the chemical
process, i.e., are neither active pulping chemicals (e.g.,
NaOH and Na₂S in the kraft process), nor compounds present
as a result of incomplete conversion of makeup chemicals...
Increasing grain yield in wheat (Triticum aestivum L.) is a challenging task, because yield is a complex trait controlled by many genes and highly influenced by environmental factors. The genetic control of yield components and other traits associated with yield may be less complex and thus more manageable for breeding....
An investigation was conducted to determine the origin of
Mima mounds in Jackson County, Oregon and Thurston County,
Washington. Data on soil morphology, mineralogy, and particle
size distribution were used to test the periglacial ice wedge hypothesis,
the gopher hypothesis, the erosional hypothesis, and the
loess hypothesis.
The results of...
Geographic Information Systems (GIS) is a burgeoning
field with its roots in geography. It is increasingly
being used by a large variety of disciplines, including
land use planning, as a decision support tool to help solve
complex spatial problems. At Oregon State University,
researchers have developed an analog model which...
Changes in consumer preferences have created a need for developing differentiated and higher valued seafood products. Providing consumers with more information about seafood products at the time of purchase has been suggested as a way of differentiating seafood and promoting healthy fisheries. A discrete choice experiment conducted at high-end grocery...