Life Sciences Commons^™

Identification And Characterization Of Possible Multiple Binding Sites For ((3)H)8-Oh-Dpat In The Hippocampus, Dawna Lea Evans

Masters Theses

No abstract provided.

Isolation And Characterization Of The Triiodothyronine Regulatory Region Of The Fatty Acid Synthase Gene In Avian Species, Delfina Rivera Valencia

Masters Theses

Fatty acids are utilized for energy storage in the form of triglycerides or neutral fats. One way to regulate fatty acid biosynthesis is to regulate the activity of fatty acid synthase (FAS), the enzyme that catalyzes the reaction. Previous studies have shown that regulation of FAS activity and synthesis is regulated by the hormone triiodothyronine, T₃, at the level of transcription. Thus, isolation and characterization of the promoter region o f the FAS gene will enable the identification of the thyroid hormone response elements (TREs). This study could shed light on the mechanisms on how this gene can …

The R Value At Vo2 Max During Maximal Graded Exercise Treadmill Tests Of Coronary Artery Diseased And Nondiseased Subjects, Sherry S. Williams

Masters Theses

This study examined the R value at VO2 max during maximal graded treadmill exercise tests to determine if it was a reliable indicator of VO2 max and could therefore be used as a test termination criterion. The subjects in this study were 160 coronary artery diseased (CAD) patients and 170 nondiseased individuals. Data were collected from existing stress test records. The R value was also analyzed to determine if proportions of diseased and nondiseased subjects were the same. The time it took 100 CAD patients to reach VO2 max and exhaustion once R rose above 1.00 was also examined.

The …

Mate Choice: Investigation Of Mating Preference For Siblings Versus Nonsiblings In The Solitary Vespid Wasp Euodynerus Foraminatus, Omoury A. Chambegga

Masters Theses

Caged wasps of Euodynerus foraminatus were given a choice of a sibling or a nonsibling for mates. Two types of experiments were conducted: female choice and male choice. For female choice experiments one female, a sibling male, and an unrelated male were introduced into an observation cage. For male choice experiments one male, a sibling female, and an unrelated female were introduced into an observation cage. Females preferred to mate with siblings, but males mated randomly with regard to family relationship.

Fixed-Ratio Size As A Determinant Of The Development Of Tolerance To Morphine, Mark J. Nickel

Masters Theses

The acute and chronic effects of morphine were examined in pigeons exposed to a multiple schedule with fixed ratio 5, 25, and 125 components. Acute exposure to morphine (0.56-10.0 mg/kg) resulted in rate reductions under each component when the dose was 1 mg/kg or higher. With chronic exposure to 5.6 mg/kg, tolerance to the rate-reducing effects of morphine was evident under each fixed ratio component. The development of tolerance was determined to some extent by fixed-ratio size, a result similar to earlier findings with cocaine.

The Suburban Rice Farmers: Economic And Cultural Change In Japan, Makoto Chiwaki

Masters Theses

The world economic situation is forcing the Japanese government to initiate policies designed to make its rice farming industry more competitive on the world market. These new policies, along with the growth of Japan's urban areas, are causing certain stresses on the cultural institution called bunke among the part-time rice farmers in the Kaizuka region of Chiba City, Japan.

An ethnographic study of these farmers reveals that the farmers of the Kaizuka region have responded to recent changes differently from the farmers of other regions because of their cultural institutions and traditions.

Fiber Recovery From Paper Mill Primary Sludge, Christopher J. Roschek

Paper Engineering Senior Theses

Recoverable fiver is a major component of paper mill primary sludge, and it is often landfilled instead of utilized to its potential. With successful recovery of fiber from sludge, less raw materials will have to be purchased and a lesser volume will be landfilled, thus decreasing landfill disposal costs.

Primary sludge from a local paper mill was collected and stored at Western Michigan University. Solids and ash testing was done first to get background knowledge of the sludge. Fiber length was then determined using the Clark Classifier. Fiber recovery was accomplished by using a laboratory scale sidehill screen. After screening, …

The Effect Of Post Consumer Waste On Flexographic And Rotogravure Printing Operations, Kirk E. Jacobsson

Paper Engineering Senior Theses

The impact of deinked post-consumer secondary fiber (PCW) on the printability and runnability of an uncoated recycled sheet through printing operations was studied. The PCW was substituted into the base stock (50/50 HW/SW) at levels of 25%, 50%, and 100%; and printed on web fed flexographic and rotogravure printing presses. Tensile strength, brightness, and Δ gloss decreased with the addition of secondary fiber, while opacity, roughness, and bond strength increased. Stretch, tensile energy absorption, and tonal response remained relatively unchanged as the percentage of post-consumer waste increased.

Washing Between And After A Two Stage Hydrogen Peroxide Bleaching Sequence To Reduce Reversion And Increase Brightness, Craig Hellberg

Paper Engineering Senior Theses

Even though a fairly high brightness can be obtained, mechanical pulps, such as refiner mechanical pulp, contain all of the color forming groups found in the wood. This limits its use because these groups revert back to a yellow color over time. If they could be removed by washing, RMP could be used in a wider variety of grades. This project will discuss background on the subject, followed by a design and procedures to try and accomplish this goal.

It was found that excessive washing will give a temporary increase in brightness, however no statistical change in reversion is seen.

Green Liquor Pulping For Corrugating Medium, Michael Thompson

Paper Engineering Senior Theses

24 pulping runs for producing corrugating medium were conducted with various chemical concentrations of sodium carbonate and sodium sulfide (green liquor). All other pulping variables were held constant. The results showed a linear relation between the amount of total alkali (on wood) and yield decrease at constant sulfidities. The results also showed the optimum sulfidity of the liquors to be 25%. The strength properties were only affected by the pulp yield and not by the amount of chemical concentration used to produce that yield.

Fountain Solution Ph And Conductivity Changes Caused By Paper Extractables During Offset Printing, Douglas E. Cox

Masters Theses

Economical and environmental issues are causing papermakers to change from the traditional acid papermaking process to neutral and alkaline papermaking processes. Also, offset printers are changing from traditional acid type fountain solutions, with or without alcohol, to: (a) neutral, (b) alkaline, and (c) acid with alcohol substitute type fountain solutions. The interaction between these new papermaking variables and fountain solutions and their effect on printability needs to be investigated.

The pH, conductivity, and contact angle changes of five different offset printing fountain solutions were monitored during offset printing press trials on acid, neutral and alkaline basestocks.

The results indicate that …

Correlating Bod And Cod In Paper Mill Effluent Streams, Lloyd M. Tuskan

Paper Engineering Senior Theses

Biochemical oxygen demand (BODs) is a five-day test. Chemical oxygen demand (COD) is a two-hour test. Both measure the oxygen demand exhibited by organics in a wastewater sample.

It was proposed that if a significant correlation exists between BODs and COD, the faster and simpler COD test could be substituted for the more commonly used BODs test. Three effluent streams were chosen to test: a pulp mill stream, a paper mill stream, and a combined effluent stream. The correlation that existed between BODs and COD in the combined effluent and paper mill streams were 0.90 and 0.92 respectively. A correlation …