Chemical equilibrium is a major factor in many natural and
industrial systems. The ability to predict ionic equilibrium is
extremely valuable in industry in solving problems without the costs
involved in full scale experiments. An example of an application in
the pulp and paper industry is the prediction of non-process...
This thesis describes evaluation of a novel self-sealing chewable sustained release tablet that can maintain controlled release of drug regardless of compaction, crushing, or chewing. The new formulation contains polyethylene oxide which produces a sealant effect for cracks produced in the polymer coating during compaction. Dissolution studies were conducted and...
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...
In this research a model is developed to predict population for relatively
rural areas experiencing rapid economic development. Of the many
ways to predict population size, in this research a "demographic-economic"
model is chosen for use. The economic variables which aid in projecting
population are total employment, and net changes...
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...
The effects of possible operating variables such as flow rate, surface temperature, bulk temperature, solids contents, sulfate addition and pH on the fouling of sulfite spent evaporators were studied. The study pointed out that the Ca⁺⁺ concentration difference between heated surface and bulk is the most important factor for fouling...
The effect of concentration, vehicle and surfactant on the
absorption of benzocaine -³H across the rat's rectal mucosa was
investigated. Blood radioactivity levels were determined after the
application of benzociane -³H containing suppositories and ointments.
A wet oxidation method was used for sample digestion. Since the
radioactivity counted is the...
Vital rates and population connectivity are fundamental concepts in animal ecology and such information is critical for successful conservation planning. The Black-backed Woodpecker (Picoides arcticus) is a species of conservation concern because of its strong association with forests recently burned by high-severity wildfire. However, several recent studies have found that...
The infrared spectra of the metaborate monomer and trimer
ions in NaC1, KC1, and KBr were studied. These spectra contain
bands due to the trimer in solid solution, in a second phase of the appropriate
potassium or sodium salt, and perhaps on adjacent lattice
sites. Furthermore, complex equilibria exist between...
The forest products industry often uses intermediate-support cable logging systems to transport logs from the harvest site to a staging area. A method is presented to assist in the analysis and design of these cable systems. The method determines tensions in individual cables, forces on and stresses in the support...
Propionic acid, live Propionibacterium shermanii, and
Dimethyl Fumarate (DMF) were tested for their stimulatory or
inhibitory efects on yeast, bacteria, and molds. The amount
of propionic acid required for inhibition of molds was
strain specific and equal to or less than that required for
inhibition of the yeasts. Live P....
Improved assay methods for determination of dyphylline levels in plasma, saliva, and urine utilizing high pressure liquid chromatography have been developed. Detection of levels as low as 25 ng/ml from 0.5 ml plasma and 50 ng/ml from 0.5 ml saliva were possible. Both procedures utilized the same extraction process. A...
The current and potential benefits of using geographic information systems (GIS) to support state-level and regional-scale ocean management in the United States are evaluated. Specifically, the role of GIS in facilitating improved integration of management strategies for a variety of resource use issues across multiple management jurisdictions is examined, along...
Gastric retention time of single unit dosage forms in swine was found
to be much longer than in humans. It was concluded that swine are not a
good animal model to study GI transit time of nonerodable or slowly eroded
dosage forms. Noneradable and slowly eroded dosage forms used to...
The bioavailability and pharmacokinetics of theophylline
in rabbits were determined following both oral and
intravenous administration of the drug. Serum theophylline
concentrations were determined using high pressure
liquid chromatography. Pharmacokinetic parameters were
determined and verified by computer analysis. The overall
mean Beta disposition constant was 0.089 hr⁻¹ which corresponds
to...
This thesis describes a project to produce controlled release ketoprofen beads for capsules, both at Oregon State University and in an industrial scale-up operation, that are bioequivalent to the commercial product Oruvail. A bead formulation was produced by layering drug and binders in water onto nonpareil sugar seeds in a...
In vivo research following ingesting of commercially available
Lactobacillus tablets, which contain about 2X10⁶ cfu/tablet of
Lactobacillus acidophilus and Lactobacillus bulgaricus cells in a dose
of four tablets daily, showed serum lipoprotein concentrations did not
change significantly. In order to increase the number of viable
Lactobacillus bacteria after challenging in...