An experiment was conducted to determine if selection from
standardized litters would be effective in separating lines of mice
selected for increased and decreased litter weight at 14 days of age,
and if response to selection on this maternally influenced trait could
be accurately predicted.
Data were collected on litter...
This report presents a refined method for the calculation of fuel centerline temperatures and the linear-heat-rating-to-incipient melting, ' Q'[subscript m], of mixed-oxide fuel typical of that to be used in the Fast Flux Test Facility and in Liquid Metal Fast Breeder Reactors. Of primary concern are the effects of the...
Studies were conducted to determine the nature of the interaction
between atrazine (2-chloro-4-ethylamino-6-isopropylaminos-
triazine) and magnesium on tomatoes. This interaction was
studied under two light regimes: continuous light and a 12-hour
photoperiod. Tomato plants were grown in sand cultures at three
levels of magnesium fertilization. Four weeks after planting,
atrazine...
A computer code capable of modeling the burnup dependent static behavior
of a boiling water reactor was developed. The code calculates
three-dimensional quarter core power distributions using a simulated
two-group diffusion theory model. Thermal-hydraulic calculations account
for the interaction between power, coolant flow, and void fraction
distributions. Cross sections are...
The production of C¹⁴O₂ metabolized from glucose labeled in
specific carbon atoms by homogenates of chick embryonic and adult
heart was compared by the radiorespirometric technique. Homogenates
of early (two to five days of incubation) embryo hearts were
found to utilize the phosphogluconate pathway of glucose catabolism
to a greater...
An investigation was undertaken to determine whether
potassium is indeed necessary for the in vivo synthesis of a
specific protein. The effects of univalent cations on the
inductive formation of nitrate reductase and on the level of
activity of representative non-adaptive enzyme are presented.
Cultures of Neurospora crassa were grown...
The spin-orbit states of both the ground and several
charge-transfer-excited electronic configurations of
gaseous MnX₂, CoX₂, NiX₂, and CuX₂ are derived. Only one-electron
transitions from the ground electronic state are
considered. The molecules are treated as linear in both
the ground and excited states. In each case, the spin-orbit
states...
Quantity variations in pigments and lipid classes were determined
following γ-irradiation of Micrococcus radiodurans, Sarcina
lutea, and Pseudomonas aeruginosa.
Pigmentation was determined by extraction with organic solvents
and measured as optical density at 475 mμ for M. radiodurans
and S. lutea, and 410 mμ for Ps. E aetuginosa. Pigments of...
This is a report describing the limitations of optical character
recognition using the mask-matching principle. Conclusions
are supported by the results of an experimental system built for
the purpose of reduction to practice.
Formulas are derived describing the limitations of a mask-matching system. Given desired character reading speed, a specified...
This study evaluated the effects of tillage system, rotational tillage sequences, and winter seed burial depth on weed seedling recruitment in irrigated cropping systems. Notill (NT) planting of vegetable crops reduced emergence of hairy nightshade by 77 to 99% and Powell amaranth emergence from 50 to 87% compared to conventional...
The relationships between zinc, iron, and phosphorus in sweet
corn were investigated under field and greenhouse conditions. The
soils used in this study (both acid and calcareous) were low in available
zinc and phosphorus.
The experiments received standard, uniform rates of nitrogen
potassium, magnesium, and sulphur. Corn was used as...
This study deals with the autoradiographic analysis, using a
DNA precursor (tritiated thymidine), of the trophoblastic giant cells
in the placentae of the golden hamster (Mesocricetus auratus Waterhouse),
beginning with the sixth day of gestation and extending to term
on day sixteen. Both the percent of labelled cells in the...
In light of the current world-wide energy situation,
the utilization of the immense reserves of geothermal
energy is being actively pursued. The thermal energy contained
in a geothermal reservoir is mainly stored in rocks,
but is also held in liquid water and/or steam. The generation
of electrical power from these...
An expression for the ratio of the upwelling nadir radiance L(π, z) and the downwelling scalar irradiance Eod(Z) is derived from the following equation of radiative transfer. This expression is given by RSR(z)=[L(π, z)]/Eod(Z) = [fb(z)bb(z)]/2π[k(π, z) + c(z) – fL(z)bf(z)], where bb(z) is the backscattering coefficient, k(π, z) is...
It has been reported recently that extracts of filbert nuts demonstrate considerable proteolytic activity on a non-fat milk solids substrate. The addition of these extracts to cheddar cheese, in an attempt to enhance the rate of ripening, has been suggested.
In these experiments, the extracts of two varieties of filbert...
A laboratory-prepared hot-water extract of yeast is required
for vigorous growth of San Francisco sourdough bacteria (Lactobacillus
sanfrancisco) in pure culture. This requirement was examined
with the goal of determining what is unique about fresh yeast extractives
(commercial extractives exhibit much lower growth promoting
activity), and which components of fresh...
Environmental swabs and meat samples from two of three seafood
processing plants sampled on the Oregon Coast were found to
contain Salmonella. Although these enteropathogens were not isolated
from the finished products, the danger of contamination is great
since the processing received by many seafoods is not designed to
yield...
The fortification of a growth medium for Micrococcus radiodurans
with N-Z -Case (a pancreatic digest of casein) resulted in a decrease
in pigmentation and resistance to ultraviolet-irradiation. The
decreased resistance was exhibited on the survival curve as a reduction
in the extrapolation number from ~300 to ~20 with little change...
An expression is derived for the rate at which the diffuse attenuation coefficient for vector irradiance approaches its asymptotic value in a homogeneous medium. The asymptotic approach rate is shown to be a function of boundary conditions at the surface and the asymptotic diffuse attenuation coefficient which is an inherent...
Occasions arise in engineering for conducting probabilistic analyses concerned
with the "state" character of systems which range in scale from the circuit level (and even
below) through the black box level and on up through the system level.
These stochastic systems are systems with random as well as deterministic features....
A suitable method for the utilization of shrimp processing waste was investigated. The shrimp waste, which consisted of shell, viscera, and residual meat particles, was dried into a pink meal. This meal contained 5.4 percent moisture, 23.5 percent ash, 4. 1 percent crude lipid, 36. 3 percent actual protein, and...
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...
Natural radionuclides may be indicators for dense mineral
placers along marine shorelines. Relict beach and river deposits
occur in continental shelf sediments. These deposits result from the
reworking of beach sands by wave action during the Holocene Transgression.
Some dense, resistant minerals associated with placer
deposits are known to contain...
Developmental series of Rana pretiosa (110 specimens), R.
cascadae (100 specimens) and R. aurora (115 specimens) were bone
stained and cleared in glycerin. The growth and developmental patterns
of the skull and selected bones were followed from the first
appearance of bone through adult stages. The sequential appearance
of the...
An evaluation of the meteorological usefulness of a maser RF
amplifier on an AN/MPS-34 X-band weather radar indicates that there
are both advantages and disadvantages to its use. The problems
associated with the maser used in this study included tuning problems,
loss of gain through loss of liquid helium and...
This investigation was designed to determine the general achievement,
ability to solve applied problems, and attitude toward the role of
mathematics in science of college calculus students grouped in an
experimental class according to academic major during their first
three terms. The subgroups were biology-business, mathematics,
and science-engineering majors. The...
A sediment production and infiltration study was conducted
within the Oregon Range Validation Project Work
Area in east-central Oregon during the summers of 1977 and
1978. High intensity rainfall was simulated by using a
Rocky Mountain Infiltrometer. This sprinkler-type infiltrometer
closely approximates conditions associated
with natural rainfall.
The basic ecological...
The major purpose of this study was to investigate the effects
of indoor aquatic activities on the health patterns of the college student.
Three groups of students were used in the investigation: the
experimental group, comprised of students enrolled in aquatic
activities, and two control groups, the first comprised of...
Two experiments involving 33 Holstein cows were conducted
for the primary purpose of studying the effects of flumethasone (a
synthetic glucocorticoid) on milk and milk constituent yields. The
secondary purpose was to compare udder health, reproductive performance,
and body weight changes of cows on flumethasone therapy.
Nine Holstein cows were...
The magnitude of the effect on decay heat of neutron
capture by fission products for hypothesized "worst case"
irradiations was examined. This effect is shown to be
small (less than 2 percent) for times less than 1,000
seconds and a simple model is presented for estimating
the magnitude of the...
Previous research has shown that activated carbon is effective
in inactivating certain herbicides applied as a preemergence treatment.
Studies were conducted in the greenhouse to determine the
influence of various factors on the ability of activated carbon to
inactivate herbicides applied after carbon application. Field studies
were conducted to determine...
Investigations of plasma production by a pulsed dye laser
microprobe were made. Comparisons between a Q- switched and a
pulsed dye laser system were made on the intensity of the continuum
produced by atmospheric breakdown. The dye laser system was
foundtominimize the production of the continuum which in turn
allowed...
Persistent infections with infectious pancreatic necrosis virus
(IPNV) were established in two salmonid cell lines and in live brook
trout. Virus inocula containing high concentrations of defective
interfering IPNV enhanced but were not a requirement for the establishment
of persistent infections in cell lines derived from steelhead
trout (STE-137) and...
This study deals with the patterns of development and distribution
of connective tissue fibers in the placentae and adnexa of the golden
hamster (Mesocricetus auratus Waterhouse). The placentae and
adnexa representing all days of gestation from six to term were
stained for the presence of collagen, reticulin, and elastin. Additionally,...
Atrazine is an asymmetrical s-triazine herbicide used pre-
and post emergence for weed control in many crops. Triazine herbicides
have been used in the Pacific-Northwest for weed control in
orchard crops. Under certain conditions where trees were grown
in nutrient deficient areas, it was noted that toxic symptoms due to...
A cytogeographic study, the relationship between chromosome
number and geographical and ecological distribution, was made of the
tetraploid and hexaploid chromosome forms of Achillea millefolium L.
in western Oregon. Principal objectives of the investigation were
three. First was a determination of the exact distributions of the two
levels, as previous...