Hydrogen cyanamide (CY) has been used to break rest
in temperate crops, but levels used to overcome rest are
sometimes toxic to plants. The rest breaking effect of CY
is thought to involve peroxide metabolism. Inhibition of
catalase by CY has been proposed as a mechanism for
overcoming dormancy in...
The tissue and substrate degradational enzymes, acid hydrolases,
in endosperm were studied in order to discern the mechanism of seed
shriveling in triticale (XTriticosecale Wittmack).
Acid hydrolases in crude extract of 7-week-old developing
endosperm of 2 lines each of triticale with shriveled (6TB,JZBS) and
plump seeds (6TA, RBP) were successfully...
In order to estimate wind turbine residL2;characteristics
in the presence of atmospheric turbulence, the important atmospheric
sources for the force excitations felt by the wind turbine system
must be identified and characterized. The goal of this research
is to develop the wind turbulence input model for horizontal axis
wind turbines....
The purposes of this study were to identify factors that
influence industrial education teachers to use computers in their
instruction and to explain the relationships among these factors.
For the purposes of this study, the term "to use computers" meant use
of computers in one or more of the following...
Two packages of subroutines were developed to perform material
balances on chemical processes using the simultaneous modular
approach and the equation-based approach. The performances of these
packages were compared for five different processes under at least
two conditions: one with no design specifications, and one with two
or more design...
The numerical modeling of motions in the atmosphere's
planetary boundary layer (PBL) is a challenging task. In
general, the boundary layer interacts with both the overlying
atmosphere and the underlying land or water surface
in a complex manner. Random turbulence is also present in
the PBL which precludes exact prediction...
This compilation of theses and dissertations (a part of the OSU Bibliographic Series) for the period 1970-1977 reflects this university's emphasis on research and graduate study. It may be viewed as an indicator of the contributions made to the state of Oregon through graduate study and research at Oregon State...
Poetry in the People's Republic of China during the past 30 years has been dominated by works intensely political in nature – a kind of poetry known by the name zhengzhi shuqing shi (political lyric). The function of this poetry was to eulogize current political movements and to generate public...
A model reduction method for stable, linear, time-invariant,
continuous systems is critically studied. This
method, proposed by Prof. Ouyang, is based on the concept
of power dispersion and the least-squared estimation
technique. The reduced models obtained by this method retain
the stability of the stable, high order original systems and...
An algorithm is developed to compute the time averaged, output
statistics of a linear system with periodic coefficients forced by
stationary white noise. The algorithm makes use of Floquet theory
and introduces the averaged system dynamics matrix to obtain more
favorable numerical performance. The time series approach to
averaged statistics...
Studies were conducted to investigate the metabolism of
selenium (Se) , and the influences of Se on the metabolism of cadmium (Cd) and inorganic mercury (Hg) in rats, and in ram semen in
vitro. Se-deficient (-Se) or Se-adequate (+Se) rats were injected intraperitoneally with either ¹⁰⁹CdCl₂ (5 μCi/rat) or ²⁰³HgN0₃...
Effect of diets varying in amount of cholesterol and
polyunsaturated to saturated fatty acid ratio (P/S) on plasma lipid
levels and lecithin:cholesterol acyltransferase (LCAT) activity was
determined in fourteen young adult male subjects during a 13-week
experimental period in a crossover design.
Control diet was fed for two weeks prior...
Published July 1982. 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
As a result of the automation revolution, robots
are assuming ever more complex and demanding tasks.
Robot system control schemes for fast and precise robot
motion require utilization of the entirety of the robot
dynamic formulations and the ability to evaluate these
formulations in real-time. The dynamic formulations,
which take...
A global solution is presented that accurately accounts for the
singular behavior at all irregular points. The linearized boundary
value problem in a semi-infinite strip in the physical plane is
transformed into a smooth unit disk by two successive conformal
mappings. The global solution results from a Fredholm integral
equation...
The bandgap voltage reference technique, as implemented in Silicon technology, has evolved to a state of advanced development and become the method of choice for temperature independent voltage biasing in integrated circuits. The heterojunction bipolar transistor (HBT), fabricated from epitaxial A1GaAs /GaAs, is developing to a point where basic circuit...
The sliding mode controller, based on the theory
of the Variable Structure System (VSS), is considered
for a robot manipulator. By consideration of VSS theory,
the nonlinear interactions of manipulator dynamics
are suppressed by use of linear sliding equations, and
VSS robustness with respect to the unknown physical manipulator
parameter...
Several new solid-state inorganic borates have been prepared and
characterized. Single crystals of the simple orthoborate ScB0₃ were
grown and its structure was determined by single-crystal X-ray
methods. The new borates Li₃Sc(B0₃)₂, LaSc₃(B0₃)₄, NdSc₃(B0₃)₄,
SrNaB0₃, and Li4Ln4MB90₂₃ (Ln = Y, Er, and Gd; M = Al and Ga) were
identified...
We extend previous results for optimally scheduling
concurrent program modules, called tasks, on a fixed, finite number
of parallel processors in two fundamental ways: (1) we introduce a
new heuristic which considers the time delay imposed by message
transmission among concurrently running tasks; and (2) we
introduce a second heuristic...
We will describe two known strategies for static processor
allocation in an n-cube multiprocessor, namely the buddy system
strategy and the gray code strategy, and then propose a new strategy
that outperforms the first by (n-k+1) and the second by (n-k+1)/2 in
cube recognition. Furthermore, our strategy is suitable for...
Documentation of the side effects of pesticides on
arthropod natural enemies has expanded rapidly since the
1950's as part of an increase in non-target side effects
literature. Most reviews have been based on empirical
analysis of selected literature. The SELCTV database was
developed to make a larger information base accessible...
Recently, high carbohydrate diets were recommended for the
treatment of diabetes mellitus. All aspects of these diets, however,
have not been fully tested — particularly in insulin dependent
diabetes mellitus (IDDM). The present study was designed to
investigate the effects of high carbohydrate, low fat diets (HCLFD)
on blood glucose...
The vascular system of Aplysia californica is a simple visceromotor system with three main arteries innervated by a small pool of identified neurons. I used this system to
study the functions of neuropeptide transmitters and their actions on neural and muscle tissues. A central finding of this study is that...
The lipid composition of plasma membranes of corpora
lutea was examined to determine whether changes in this
organelle occur during regression and early pregnancy in
the ewe. Forty ewes were assigned to be necropsied on
days 13 or 15 of the estrous cycle (D13-NP and D15-NP) or
pregnancy (D13-P and...
Recent studies have demonstrated that perturbations of
intracellular thiol and calcium homeostasis may be important events
in the early development of cell injury by toxic chemicals.
Incubation of isolated rat hepatocytes in a calcium free
medium, severely depleted intracellular Ca²⁺ levels and resulted in
the loss of both cytosolic and...
Dissolution profiles of two commercial products (Motrine and Rufen®) were analyzed and compared at 8 pH levels, ranging from pH 2.0 to pH 8.0. It was demonstrated, as expected, that the rate and extent of ibuprofen dissolution dissolution was pH dependent. In vitro dissolution characteristics of the ibuprofen solid dispersion...
The influence of substrate and enzyme concentration on the rate
of saccharification of two defined, insoluble, cellulose substrates,
Avicel and Solka-Floc, by the cellulase enzyme system of Trichoderma
viride has been evaluated. Assays utilized enzyme concentrations
ranging from 0.014 to 0.056 filter paper unit per mL and substrate
concentrations up...
The cholesterol content (mg/100 g wet tissue) of the
longissimus dorsi muscle and the subcutaneous adipose
tissue of "Country Natural Beef" and regularly produced
beef was determined by a spectrophotometric method.
Proximate analysis (moisture, fat and protein contents) of
both types of beef was also determined.
Country Natural Beef (natural...
Because Douglas-fir [Pseudotsuga menziesii(Mirb.)Franco] bark is a raw material produced in our renewable forests along with wood, an understanding of the ultrastructure of bark cells is of paramount importance if wood technologists are to utilize the bark to the fullest potential. The objectives of this study were to develop microscopic...
The effect of reducing sodium chloride in Cheddar cheese was
studied. Milled curd from a split-lot was salted at selected NaCl
concentrations and analyzed through aging by sensory and rheological
tests. Estimation of differences in compositional analysis, lactic
acid populations, degree of proteolysis, water activity, and pH were
also determined....
In spite of imperfections, this monograph is useful in locating bird skins collected along the Oregon Coast that are stored in about 80 museums. This monograph lists over 11,000 records of skins for 279 bird species and 192 records of skeletons for 52 bird species. Each record includes the species,...
The metabolic fate of cholesterol delivered to rat hepatocytes by rat plasma lipoproteins was determined. Binding and degradation of rat low and high density lipoproteins (LDL and HDL) in rat hepatocytes were studied. ¹²⁵I-labelled LDL and HDL were incubated with cells in the presence of varying concentrations of unlabelled lipoproteins...
A two-part study was conducted with three poorly water soluble
drugs (phenylbutazone, tolbutamide, theophylline) to develop two new
drug delivery systems based on physical-chemical approaches.
In the first part, tolbutamide and phenylbutazone were made into
solid dispersions with various excipients using a lyophilization
technique. In vitro dissolution studies of these...
Fruit juice concentrates- hard pear, soft pear, fig,
prune, raisin, white grape, and pineapple, and sweeteners-invert
beet, invert cane, and high fructose corn syrup
(HFCS) were characterized by sugar profiles, nonvolatile
acid profiles, UV spectral profiles, and mineral content.
These fruit juices and sweeteners were also used to
adulterate commercial...
A theory is developed to provide an analytical solution to an
unsteady flow field which is partially occupied by a porous structure.
The flow is induced by a small amplitude incident wave
train. The porous structure may contain multi-layer anisotropic but
homogeneous media. Three typical porous structures are investigated:
a...
This is a listing of both PhD and Master's· theses relating to the areas of forestry issued during the period from July 1976 to June 1981. The
list is arranged first by state, then by college or university within each state. Authors of theses are arranged alphabetically under each of...
Static and dynamic numerical techniques which are suited for the
analysis and simulation of various planar microstrip components
encountered in hybrid and monolithic microwave integrated circuits are
presented. The static analysis makes use of an excess source formulation in conjunction with an efficient mathematical treatment to
extract the discontinuity parameter...
A complete solution, exact to second-order, for wave motion
forced by a hinged-wavemaker of variable-draft is presented. A
solution for a piston type wavemaker is also obtained as a special
case of a hinged-wavemaker with negative infinite draft. The
existing Stokes inviscid theories for mass transport is extended to
include...
The purpose of this study was to determine the
effects of an experimental approach to English language
acquisition among preschool children attending
low-cost community kindergartens in Singapore. Group
and sex differences in the performance of four language
tasks, as well as the effect of the interaction
between group and sex...
The atmospheric fluidized bed combustor (AFBC) is an alternative to
the pulverized coal burner. The size of a utility scale AFBC would be
enormous so that the use of large particles is necessary to reduce its
size. In modeling the combustion of coal and capture of sulfur released
from the...
Several experiments were conducted to examine the toxicity of Senecio jacobaea (SJ) in animals resistant to pyrrolizidine alkaloid (PA) intoxication and to determine the extent of alterations in mineral metabolism as a result of SJ intoxication. Inclusion of SJ into diets containing added copper (Cu) resulted in increased (P<.01) liver...
A sucrose density-gradient ultracentrifugation technique for
obtaining microsomes has been developed. This technique has
advantages over the classic differential centrifugation technique, in
that it is faster, is better suited to work with small quantities of
tissue, and offers the opportunity to work with a defined microsomal
sub-cellular fraction, rather than...
Control algorithms for accurate and fast moving robots require the use of the complete dynamic model of the robot. The complete dynamic model takes into account the nonlinearity and coupling terms of the whole structure. The time of computing the dynamic equations determines whether they are usable in practical applications....
Published June 1985. 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
Reactor refueling is a computationally intensive
problem solving process that requires automation since
significant resources are expended upon the search for
an optimal core loading. Without imposing some
constraints upon the configurations investigated, an
extremely large number of prototype loadings may be
generated without discovery of an improved loading. As...
Display, which is the function for displaying the
schema of the network at the conceptual level, is implemented
to enhance the network database system ALLEGRO.
To display the schema is one step towards modifiable
schemas in the network model. The problem of updating a
schema is examined at all three...
Different gate length (0.5 μm 16 μm) Al GaAs/GaAs and
AIGaAs /InGaAs High Electron Mobility Transistors were electrically
characterized in order to compare the room temperature DC device
performance with one-dimensional device models. Model parameters
such as the channel mobility and source/drain series resistances are
extracted from independent measurement of...
Replication associated protein and enzyme activity levels increase as cells enter
S-phase of the cell cycle and diminish as cells leave S-phase. Accordingly, replication
associated functions decrease as myoblasts withdraw from the cell cycle to terminally
differentiate. In an effort to understand signals effecting growth associated expression
of genes, the...
This thesis reports on the crystal growth, fabrication,
modeling and performance of Graded Index-Separate Confinement
Heterostructure laser diodes which contain pseudomorphic InGaAs as the
active region material. Laser epitaxial layers were grown with
different indium mole-fractions, and a constant InGaAs layer thickness
of 10 nm, on both sides of the...
The major goal of this research work was to develop better
electrical measurements for the evaluation of silicon material
quality.
The first approach investigated was the Zerbst generation
lifetime measurement technique. It was demonstrated that the
error in the estimation of the generation lifetime obtained with
this technique could be...
Several levels of eukaryotic chromatin structure have
been observed: the nucleosome, the 10 nm and 30 nm fibers
and loop domains, apparently attached to the nuclear
matrix. In this research, the structure and function of
chromatin at two of these levels was investigated, with
studies on both nucleosome positioning and...
Ultrafiltration of d'Anjou pear juice in the batch mode with a
Romicon HFXS MXII pilot-scale ultrafilter produced a "sparkling clear",
light-colored permeate which was sterile, essentially free of pectin,
and lower in phenolics than the feed juice. Retention characteristics
of PM-50, PM-30 and PM-10 hollow fiber membranes were tested at...
Fucus distichus L. Powell zygotes were used to investigate
cell wall synthesis and development and to construct a model of
cell wall structure.
Alginate synthesis was investigated. Zygotes were cultured
in seawater containing ¹⁴C-bicarbonate. Alginate represented
12%, 37%, and 1.7% of the label recovered from whole zygotes,
wall, and cytoplasm,...
Due to its high strength/weight ratio, 7075 aluminum alloy has
been widely used as an aerospace material. However, it has relatively low fatigue strength and low fracture toughness in the T6
condition. Thermomechanical processing, including pre-cyclic loading and stretching at high and ambient temperatures, has been investigated with the aim...
Four studies were conducted in the llama (Lama glama) evaluating changes in reproductive physiology, vaginal cytology, and growth. Study I. Temporal changes in vaginal cytology were correlated with alterations in serum estradiol -17β and progesterone concentrations. A 2 * 2 factorial study examined the treatment effects of a) concurrent male...
The very stable boundary layer is a region of the atmosphere typified by large
vertical gradients of temperature and momentum. Analysis of very stable atmospheric
flows is complicated by the presence of nonlinear interactions among gravity waves, shear-driven
overturning circulations, two-dimensional vortical modes and intermittent turbulence
in various stages of...
Senecio jacobaea (tansy ragwort) is a common weed in the
Pacific Northwest that contains toxic pyrrolizidine alkaloids
(PAs). Jacobine, the major PA in Senecio jacobaea, was incubated
with rat liver microsomes and metabolites were isolated by high
performance liquid chromatography (HPLC) and identified by mass
spectrometric analysis. Metabolites included a...
Male Sprague Dawley rats received a single intraperitoneal dose
of BCNU in experiments designed to measure biochemical changes associated with the pulmonary toxicity described for this agent. Changes in
serum and lung lavage angiotensin converting enzyme (ACE) activity
were measured to detect changes in pulmonary endothelial cell integrity. Alpha-1-proteinase inhibitor...
The abundance and low fat content of Pacific whiting
support Its use for the production of surimi. The
degradation of muscle proteins by myxosporidian secreted
proteinase(s) has been associated with its soft texture.
High residual activity is retained through the washing
process used in the production of surimi and precludes...
Solids movement in large-particle fluidized beds was studied in
an 18 in x 18 in (46 cm x 46 cm) tube-filled, cold fluidized bed
test facility. Direct measurement of local solid mass flux in two
dimensions at various locations inside the bed was made possible
by a new instrument developed...
A diagnostic modeling study of the cloud and precipitation
processes, and also frontogenesis have been analyzed in a severe
narrow cold-frontal rainband with the aid of a three-dimensional,
diagnostic cloud model.
The results of the model simulations indicate that the heavy
precipitation just behind the surface cold front was associated...
Feeding of [3-¹³C, 2-¹⁵N]arginine, 38a, unequivocally established that the β-
arginine moiety of blasticidin S, 1, was formed from α-arginine by an intramolecular
migration of the α-amino group to the β- position. Further feedings using chirally
deuteriated arginines 38e and 38f revealed that the aminomutase process occurred with
inversion of...
The properties of linear active coupled lines consisting of
electrically long GaAs MESFET structures are investigated for possible
applications as traveling-wave broad-band amplifiers. In addition,
the nonlinear coupled Schottky lines are studied for applications as
voltage tunable circuit elements.
The analysis of the general active asymmetric coupled transmission
lines in...
Thirty-four current worksite health promotion programs were
studied in order to obtain comprehensive information about various components
involved in the planning, implementation, and evaluation of existing
programs, and to acquire the necessary data to develop a theory and corresponding
hypotheses pertaining to successful worksite health promotion
programs. The case study...
Red Light Ladies presents a perspective on prostitution in North America, within the context of the western mining frontier. A biographical profile of the frontier
prostitutor is presented, along with an archaeological model of settlement patterns and material culture. Settlement patterns and demographic changes in the prostitutor
population are hypothetically...
Previous investigation showed that 20 mg/kg BCNU
caused inhibition of sulfobromophthalein (BSP) excretion
and inhibited bile salt independent bile flow (BSIF) in
rats by 48 h after treatment (Hoyt, 1984).
The present investigation demonstrated that BCNU
inhibited the canalicular step in the excretion of BSP.
This was indicated by the...
Perturbed angular correlation (PAC) spectroscopy of dilute zirconia alloys
and YBa₂Cu₃0₇₋x, ceramic superconductors at elevated temperature have been
measured using ¹¹¹Cd as the probe.
The oxygen vacancy concentration in the zirconia samples was controlled by
doping with yttrium or indium, which introduce vacancies, or with niobium, which
removes vacancies. A...
In this report we describe a preliminary version of a temperature/conductivity profiler that combines the calibration accuracy of a CTD with the vertical resolution of a microstructure instrument and the ease of deployment of an XBT. We also describe the results of a test of this version on a month-long...
Heat transfer characteristics and associated temperature and flow fields for natural convection in two-dimensional, square, partitioned and non-partitioned enclosures have been determined for Grashof numbers ranging from 10³ to 10⁶. The vertical side walls of the enclosure are isothermal with all other surfaces assumed to be adiabatic. An adiabatic partition...
Work is presented which explores the properties and nature of
the P-form of DNA. Initially the P-form represented an unknown
state of DNA which occurred when this molecule was in a solvent of
47.5% methanol, 5% water, and 47.5% ethanol, and which showed properties
of both native and denatured conformations....