Life Sciences Commons^™

Plybond Strength Development Of Secondary Fiber Using The Marine Polymer Chitosan, Christopher G. Sinkovitz

Paper Engineering Senior Theses

The purpose of this study was to investigate plybond strength development of secondary fiber by the addition of the marine polymer chitosan.

The chitosan was applied to refined, lightly refined and unrefined pulp suspensions. Two-ply handsheets were produced with addition levels of .5, 1, 2, 3, and 4 percent chitosan based on fiber weight.

Results indicate that addition of chitosan to two-ply handsheets significantly increased plybond strength from 30 to 120 percent depending on furnish and degree of refining. It was also determined that maximum strength values of selected tests occurred at approximately the two percent addition level of chitosan. …

Effects Of The Degree And Type Of Sizing On The Dyeing Of Paper, J. Pease

Paper Engineering Senior Theses

A study was made comparing papers dyed in a rosin/alum sized system to papers dyed in two alkaline sized systems. The alkaline sizes chosen were alkyl ketene dimer and alkenyl succinic anhydride. The dye types studied were acid, basic, anionic direct, and cationic direct. The degree of sizing was varied for each sizing type to see if the amount of sizing would effect dye retention. The papers dyed with anionic and cationic direct dyes and the basic dye were not significantly effected by sizing type of sizing degree. The direct dyes did give a lighter shade when the rosin size …

Characterization Of Kpni Interspersed, Repetitive Dna Sequence Families And Their Association With The Nuclear Matrix, Joseph A. Chimera

Electronic Theses and Dissertations

The KpnI, 1.2 and 1.5 kb families of interspersed repetitive DNAs from the African green monkey genome were isolated and characterized. Each family contains three populations of segments based on their sequence lengths and susceptibility to cleavage by the restriction enzymes KpnI and RsaI. The first population contains the smallest segments which are susceptible to both KpnI and RsaI cleavage and have fragment lengths of 1.2 kb (1.2 kb family) and 1.5 kb (1.5 kb family) respectively. The members in this population are referred to as KpnI-sensitive segments. The second population contains longer segments (> 2 kb) which represent fusions …

Sulphonation Of Tmp Fibers, Alfonso Bello

Paper Engineering Senior Theses

Paper made from TMP fibers offers good opacity and stiffness, but its use is limited because of its low strength. Chemical post-treatment of TMP offers possibilities of improving strength. Sulphonation of lignin appears to be the most economically feasible treatment. This thesis was oriented toward finding out if sulphonation of TMP fibers would improve the strength properties of TMP handsheets. Southern pine TMP fibers were treated with sodium sulfite (Na₂SO₃). The chemical concentration to be used was between 3-27% in alkali solution between pH 7-9. The temperature was between 90°-150°C. Pulp was consistency was 10%. Handsheets …

The Effects Of Temperature And Ph In Flotation Deinking Of Ultraviolet-Cured Inks, Jeffrey A. Downing

Paper Engineering Senior Theses

Since 1974, the use of ultraviolet-cured inks and coatings has become popular with the printing industry. Unfortunately for the deinking industry, removal of these inks is difficult using conventional methods in the U.S. Theory and laboratory work suggests these special inks may be removed using the flotation process.

It was discovered that the optimum flotation cell temperature for UV-cured inks is not significantly different than the optimum temperature for normal emulsifiable inks. However, optimum cell pH was found to be different between the two inks, and most effective at low pH for UV-cured ink.

Integrated Deinking System, Gregory A. Murray

Paper Engineering Senior Theses

This project concentrated on the development and subsequent results of an integrated deinking system. Although the chemistry and basic principles are quite different, a few European companies are successfully combining the two·systems by taking advantage of the differences.

Advantages of an integrated system over the conventional type included higher brightness, lower ash content and decreased sensitivity to particle size.

The experiment consisted of two different two-stage deinking systems. Each system was run twice; once with a sodium-precipitate chemistry and once with a calcium precipitate chemistry.

The system with first stage flotation, second stage washing and sodium chemistry was determined to …

The Effect Of Temperature On The Emulsification Of Alkenyl Succinic Anhydride, Steven S. Riegsecker

Paper Engineering Senior Theses

The objective of this study is to look at the effect of starch temperature on the emulsification of ASA. Historical information was limited, but it was discovered that an emulsion particle size range of 1-2 microns would give optimum size results.

A continuous emulsification apparatus was constructed using a glass venturi and power syringe to emulsify the starch and ASA. The basic conclusions drawn from the experiment were that the starch temperature did have an effect on the final sizing characteristics of the sheets. It was also possible to correlate a visual inspection of the emulsions with the final test …

Refiner Peroxide Bleaching, Sharon E. Perkins

Paper Engineering Senior Theses

Refiner peroxide bleaching trials were carried out at the Abitibi-Price Research pilot plant using a Sunds-Defibrator CD300 pilot-scale refiner. Results show that, at the pilot scale, blowline addition of bleach liquor gives better brightness gains than addition in the refining zone. Using this technique, brightness gains equivalent to tower bleaching can be obtained when the bleaching parameters are properly controlled. The most important factors were post-refiner retention time and temperature, and the alkali charge in the bleach liquor. These three factors were shown to be highly interdependent. Refining pressure (temperature) was shown to have little effect on brightness gain in …

An Analysis Of Binder Migration During Drying At Different Rates, Tokunbo S. Onadipe

Paper Engineering Senior Theses

The objective of this laboratory study is to quantitatively analyze the distribution of adhesive during drying at different rates. The effect of binder migration on physical paper coating properties was also studied. This report reviews past laboratory studies on binder migration, and the factors that affect binder migration. The coating application was done on a laboratory keegan coater. Dried coating was physically removed using a surface grinder, and the grind offs were analyzed for latex concentration, to determine the degree of binder migration. A gravimetric method of analysis was used to separate the latex and clay. Results showed that the …

Resource Partitioning In Seven Species Of Sympatric Intertidal Chitons (Mollusca: Polyplacophora), Richard D. Piercy

Loma Linda University Electronic Theses, Dissertations & Projects

Space (intertidal height and location/exposure on the rock surface), and food {gut contents) were partitioned among 7 species of sympatric intertidal chitons: Mopaliidae - Mopalia hindsii, M. ciliata, ~· lignosa, M. muscosa, and Katharina tunicata; and Ischnochitonidae - Tonicella lineata and Cyanoplax dentiens. Species distribution relative to intertidal height (-0.3m to +0.9m) showed significant differences. M. hindsii, ~· ciliata, M. lignosa, and T. lineata preferred slopes or undersides of rocks while ~· muscosa, K. tunicata, and c. dentiens occurred on the top horizontal surfaces or in more exposed habitats. Chitons differed significantly in their associations with Lithothamnion, macrophytic algae, Ulva, …

Methylphenidate Effects On The Learning And Performance Of Four Hyper Active Children, Paul James Yoder

Dissertations

The effects of methylphenidate hydrochloride (Ritalin) on the learning and performance of four hyperactive children were evaluated using a repeated acquisition procedure with both learning and performance components. Three dosages of methylphenidate plus a placebo were evaluated under double-blind experimental conditions. Dosages treated included each subject's therapeutic dosage, a dosage 5 milligrams higher, and a dosage 5 milligrams lower. Methylphenidate produced no effect on either the number of errors per session or on the rate of responding across the range of dosages tested suggesting that the medication neither facilitated nor impaired learning or performance. Data were also collected on social …

History And Distribution Of Brook Trout In The Appalachian Region Of Tennessee, Rick Dwain Bivens

Masters Theses

Brook trout (Salevlinus fontinalis) populations have been declining in the southern Appalachians and especially in Tennessee since 1900. To assess the loss of range of this southern trout, various agencies have inventoried most of the major trout streams in Tennessee over the past 10 years. To date, however, these surveys have remained disjunct and in some cases overlapping.

Survey reports and field data of brook trout inventories made from 1974 to 1984 were examined to determine the current distribution in Tennessee. Brook trout currently inhabit 275.6 kilometers in 135 streams found in eight east Tennessee counties. Brook trout …

Regurgitation By The Face Fly, Musca Autumnalis Degeer, Russell E. Coleman

Masters Theses

Face flies normally began regurgitating within 10 minutes after feeding, and continued for periods of up to 240 minutes. Almost 100 percent of flies fed a concentrated (4.8%) solution of trypticase-soy broth were observed regurgitating. The deposition of droplets onto a substrate was almost never observed, indicating that the regurgitation is not analogous to vomiting. The droplet exuded contained from five to ten percent of the food consumed, with the crop the source of the fluid. The crop is also the most likely destination of the regurgitated materiel. The purpose of this phenomenon is still not clear. However, the fluid …

Habitat Use By Black Bears In Relation To Forest Management In Pisgah National Forest, North Carolina, Allan Joseph Brody

Masters Theses

A total of 1310 locations was obtained on 18 radio collared black bears (Ursus americanus) in Pisgah National Forrest, North Carolina, during 1982 and 1983. Male home ranges averaged 3205 ha in summer and 6931 ha in fall. Female home ranges averaged 872 hectares in summer and 1712 hectares in fall. Nine of the collared animals were killed by hunters during the study, 4 of these illegally.

Bear habitat use was analyzed in relation to timber management parameters available in the U. S. Forrest Service "Continuous Inventory of Stand Condition" and other parameters derived from stand and topographic maps. Chi-square …

The Role Of The Salivary Glands In Uptake Of Fluoride In Teeth And Bone, Robin E. Vance

Loma Linda University Electronic Theses, Dissertations & Projects

The cariostatic capability of fluoride is generally recognized, in addition, it may also have a beneficial effect on bone. Fluoride is thought to exercise its cariostasis through a local effect on teeth, however, the possibility exists that fluoride exerts its action through a systemic mechanism. Fluoride uptake by rat teeth and its effectiveness as a cariostatic substance was studied in parotidectomized, submaxillariectomized, and totally sialoadenectomized animals (both parotid and submaxillary glands removed). The uptake of fluoride in bone was also quantitated for comparison purposes.

Rats were injected daily with 15 micromoles of fluoride dissolved in 0.1 ml saline. The rats …

A Quantitative Study Of The Distinctive Proteins Of The Eosinophil: A Comparison Of Normals And Eosinophilic Patients, James M. Olson

Honors Theses

Eosinophils have long been associated with parasitic and allergic diseases. Methods of procurement and purification of eosinophils in the last ten years have allowed intensive investigation into their components, properties, functions, and mechanisms (Gleich et al, 1982). The goals of this project are to separate eosinophils in blood samples taken from patients with eosinophilia and from normals based on density over distontinuous Metrizamide gradients; to determine quantitatively the levels of the three distinctive proteins of the eosinophil, specifically MBP, EDN, and ECP; and to compare the levels of these proteins found in eosinophils of patients with eosinophilia to the amounts …

Autoradiography Of Photomembrane In Hemigrapsus Nudus, Carol Fulenwider

Loma Linda University Electronic Theses, Dissertations & Projects

Protein synthesis was studied in the visual cells of Hemigrapsus nudus by light microscope autoradiography. Two hours before sunset, crabs were injected with a single dose of tritiated leucine and sacrificed at time intervals coincident with dynamic retinal changes observed in electron microscope (EM) studies of related Arthropods (Blest, 1978 and Stowe, 1980).

Two separate experiments were performed to examine time periods in the renewal process. Some periods in each experiment were overlapped to develop more accurate decay curves. Experiment I followed time regimes of 0.5, 1.5, 2.5, 3.0, 3.0, 5.0, and 6.0 hours after sunset. Autoradiographs of retinula cells …

The Role Of Vasopressin In The Fetal Renal Response To Hypertonicity, Lori L. Woods

Loma Linda University Electronic Theses, Dissertations & Projects

In order to study the effects of hyperosmolality on fetal renal function and to gain insight into the role of AVP in the fetal urine concentrating mechanism, two types of studies were performed. In whole animal studies 9% NaCl was injected intravenously into 8 chronically catheterized pregnant ewes of 130-135 days gestation and their fetuses, followed by a continuous infusion of 9% NaCl into the ewes. Fetal and maternal plasma osmolalities rose initially by 5% and remained elevated for the next four hours. Fetal arterial and venous pressures increased transiently. Fetal urine flow increased transiently by 73%, remained elevated for …

Fungal Flora Associated With Rice Seeds, Their Transmissibility, And Bases For Their Control, Teresita Estrada Umali

Graduate Student's Output

No abstract provided.

Correlation Studies Between Human Seminal Plasma Trace Metal Concentrations And Semen Quality, De-Shen Mei

Chemistry & Biochemistry Theses & Dissertations

Methodologies for the determination of cadmium, copper, selenium and zinc concentration in human seminal plasma have been developed using polarized Zeeman-effect atomic absorption spectroscopy. Within-run coefficients of variation (CY's) for cadmium, copper, selenium and zinc from pooled seminal plasma were found to be 8%, 5% , 4% and 0.5% at a mean (SD) concentration of 0.48 (0.04), 147 (7 .6), 53 (2. 1) and 122,900 (700) μg/ℓ, (n = 10), respectively.

Between-run CV's were determined to be 4% , 7%, 5% and 7% at a mean (SD) concentration of 2.4 (0.1), 147 (10. 1), 67.7 (3.4) and 115,800 (8300) …

Negative Cooperatively In The Binding Of 3-Aminopyridine Adenine Dinucleotide To L-Α-Glycero-3-Phosphate Dehydrogenase, David Wheeler

Chemistry & Biochemistry Theses & Dissertations

Glycerol-3-phosphate dehydrogenase catalyzes the reversible reaction:

NAD⁺ + G-3-P ⇌ NADH + DHAP + H⁺

The enzyme is found in organisms from E. coli to man. The primary function of the enzyme varies from organism to organism. Depending on the metabolism of the organism, the enzyme may function primarily to generate G-3-P for lipid (in organisms with a highly aerobic biosynthesis metabolism), or it may function primarily to produce NAD⁺ to support glycolysis. Complex multicellular organisms possess tissue specific isozymes of GPDH whose kinetic parameters reflect the relative importance of G-3-P and NAD⁺ production in various …

Demographic Analysis And Microhabitat Relationships Of A Small Mammal Community In Clearings Of The Great Dismal Swamp, Jean Ferguson Stankavich

Biological Sciences Theses & Dissertations

Small mammals were trapped for 14 months on two grids located within a powerline right-of-way in the Great Dismal Swamp National Wildlife Refuge. During 12,354 trap nights, individuals of 10 different species were captured. They included, from highest to lowest density, Reithrodontomys humulis, Ochrotomys nuttalli, Peromyscus leucopus, Blarina brevicauda, Synaptomys cooperi, Microtus pennsylvanicus, Microtus pinetorum, Sigmodon hispidus, Mus musculus and Oryzomys palustris. The demography (densities, reproduction, home range and dispersal) of each species was analyzed when possible. Most of the species were present in relatively low densities, with a number being captured only during the latter months of the study. …

The Effects Of X-Irradiation On The Metamorphosis And Budding Of Aurelia Aurita, Michael John Prokopchak

OES Theses and Dissertations

With the aid of the Aurelia Metamorphosis Test System, the acute or subtle morphological and behavioral effects of irradiation on the Norfolk Aurelia aurita were described and the sensitivity to X-irradiation of those organisms receiving thyroxine and those not receiving thyroxine was compared. Levels of radiation were 0 (control), 5,000, 10,000, 15,000, 20,000 and 40,000 rads. Morphology of the ephyrae, statolith and rhopalia numbers were recorded using the light microscope, Developmental abnormalities of the scyphistomae and ephyrae were recorded with the scanning electron microscope and light microscope. Two major findings from this investigation were the absence of rhopalia and statoliths …

Microbial Characteristics Of An Activated Sludge And Three Commercial Preparations After Exposure To Phenolics, Laurie Gneiding

Theses

The biological characteristics of four microbial mixtures were examined after successive exposure to phenol and 2-chlorophenol at room temperature. One of the microbial mixtures was an activated sludge from the Livingston, NJ municipal wastewater treatment plant. The other three mixtures were commercial preparations sold by Polybac Corp.(Hydrobac), Sybron Corp. (BI-CHEM DC 1006/1007), and General Environmental Sciences(LLMO).

The characteristics examined were relative counts and species of gram negative/gram positive bacteria, yeast and fungi, protozoa, and higher organisms. For the gram negative bacteria and yeasts, culturing techniques and diagnostic tubes were used to determine the predominant species. Biochemical tests were done on …

The Phillipine Extended Jurisdiction: Its Cost And Benefits To Fishery Industry, Ricardo R. Federizon

Theses and Major Papers

The Philippines is one of the countries that has its significant relations to fisheries economically and culturally. The coastal waters of the Philippines support over a million fishermen whose only source of income is fishing that does not go far off-shore. Due to population pressure and increased demand for fish as a basic food supply and as a source of foreign revenue income, more and more fishermen fish at the waters that carry a limited resource. As a result, overfishing persists that has a social and economic implication. Conflicts arise among the fishermen. Management measures are not implemented successfully because …

Sexual Differentiation Of The Rat Hypothalamus: An Evaluation Of Sexual Behavior And Hypothalamic Morphology Following Neonatal Manipulation, Michael C. Stamper

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Michael C. Stamper on August 24, 1984.

Effects Of Dehydration On Hemoglobin Oxygen Affinity And Blood Cell Volume In Two Anurans, Andrew Christopher Zygmunt

Dissertations and Theses

Two aspects of possible adaptation in cardiovascular performance caused by increased plasma electrolytes were examined. Cells in anisotonic plasma may either act as osmometers or volume regulate. Blood flow rate is dependent upon cell viscosity, which in turn is a consequence of cell volume and membrane deform-ability. Cell volume changes which increase membrane deform-ability will thus potentially extend the limits of dehydration tolerance. It was found in R. catesbeiana and B. marinus that red blood cell is maintain constant volume during dehydration. Cells in vitro initially lose water, but then sodium, potassium and water move into the cell. Cell viscosity …

The Effects Of Augmented Attentional Focus On The Performance With Practice Of A Closed Perceptual-Motor Task For Individuals Who Differ In Task Mastery, John Allen Richards

Doctoral Dissertations

The purpose of this study was to investigate the effects of augmented attentional focus on the performance with practice, of a closed perceptual-motor task for individuals who differ in task mastery. Sixty-four male volunteers were assigned to either the beginning or advanced task mastery group (n = 32) based on bowling averages (≤ 130, ≥ 150 respectively). Each subject in the task mastery groups was randomly assigned to one of four augmented focus of attention conditions, i.e., focus on: (a) environmental results of the movement that was performed (KR); (b) the movement that was performed (KP); (c) self via presence …

The Comparison Of Linear Nip Pressing Vs. Extended Nip Pressing On The Bulk And Strength Of Unbleached Kraft Linerboard, Eric J. Johnson

Paper Engineering Senior Theses

It is of increasing importance to find improved methods of dewatering in the wet press section. New technology has allowed us to improve dewatering and final sheet properties with the press section. Presently, we are faced with a choice between two pressing configurations; the conventional roll press and the extended nip press. Both press configurations are discussed. The fundamental characteristics of paper which affect it's properties are density, fiber dimensions, fiber strength, fiber orientation, and fiber bonding. This thesis investigates the effect of the pressure pulse on the final sheet properties of bulk and strength of a kraft linerboard. Strength …

Acute Effects Of Phenytoin And Thioridazine, Alone And Combination, Upon Water Intake And Body Weight Changes In Rats, Miriana Witzig-Krstic

Masters Theses

Concommitant medication of anticonvulsants and psychotropics appears to be predominant among mentally retarded, geriatric, and psychiatric in- and out-patient populations. Despite suggested interaction and toxicity resulting from such combination treatment, substantial data remains unavailable. This study was designed to explore effects of dual treatment of thioridazine