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Physiological And Genetic Mechanism(S) Of Cold Acclimation In Rhododendron, Chon Chong Lim Dec 1999

Physiological And Genetic Mechanism(S) Of Cold Acclimation In Rhododendron, Chon Chong Lim

Graduate Theses, Dissertations, and Problem Reports (ETD)

An in vitro laboratory protocol for assessing cold hardiness (CH) in rhododendrons based on electrolyte-leakage was developed. The raw leakage data were transformed into percent-adjusted injury, which showed high correlation with injury data based on visual observations. The percent-adjusted injury data---fitted to the Gompertz function coupled with the Jackknife method---allowed for reliable and statistically sound estimations of Rhododendron leaf freezing-tolerance (LFT). Utilizing this method, Tmax values for Rhododendron cultivars, species, and populations were determined and ranked relatively. Our observation of a continuous distribution of LFT in F2 and backcross (BC) populations derived from a R. catawbiense x R. fortunei cross …

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Effects Of Turbidity On The Foraging Abilities Of Brook Trout (Salvelinus Fontinalis) And Smallmouth Bass (Micropterus Dolomieu), John A. Sweka Dec 1999

Effects Of Turbidity On The Foraging Abilities Of Brook Trout (Salvelinus Fontinalis) And Smallmouth Bass (Micropterus Dolomieu), John A. Sweka

Graduate Theses, Dissertations, and Problem Reports (ETD)

Sedimentation is the major pollutant of waters in North America. Most research on the effects of increased sedimentation has focussed on its effects on stream habitat and its ramification on the reproductive potential of fish. Although relatively large sediment loads may be necessary to alter stream habitat, only small loads are needed to raise mean stream turbidity levels. Turbidity may be an important, yet relatively unexamined factor in stream fish production. With this, I sought to determine the influence of elevated turbidity on the foraging abilities of two predatory species representing both cold and warm water stream habitas, brook trout …

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Maternal Attitudes And Their Influence On The Creativity Level Of Preschool Children, Kimberly Ann Hellen Dec 1999

Maternal Attitudes And Their Influence On The Creativity Level Of Preschool Children, Kimberly Ann Hellen

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of the study was to determine if maternal attitudes influenced the creativity of preschool children. The Torrance Test of Thinking Creatively in Action and Movement (TCAM) was used to measure the creativity level of the children. The Parent As A Teacher (PAAT) was used to assess maternal attitudes. The subjects in this project were 52 preschool children. Maternal attitudes were not significantly related to the creativity level of preschool children. Socioeconomic status had significant effects on the PAAT overall, creativity and control subscales. Socioeconomic status was a poor predictor of child TCAM scores and the additional PAAT subscales. …

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Perceptions Of Hiv/Aids In West Virginia Nursing Facilities, Valarie Ann Bell Dec 1999

Perceptions Of Hiv/Aids In West Virginia Nursing Facilities, Valarie Ann Bell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction. Placement of HIV/AIDS infected individuals into geriatric long-term care facilities has been a problem since the beginning of HIV/AIDS. Specific aims. The objective of this study was to determine how prepared West Virginia nursing facilities are to deal with the HIV/AIDS population. Methods. An anonymous mailed survey guided by the organizational change theory was sent to all 144 certified nursing facilities within the state. Questions were asked about current policies, procedures, education, concerns, resources, and experiences specific to HIV/AIDS. Results. A total of 72 surveys were returned for a response rate of 50%. Most facilities (71.8%) offered educational programs …

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Oocyte Morphology And Estrogen Concentrations Following A Reduction In Progesterone In Beef Cattle, Robert A. Taft Jr. Dec 1999

Oocyte Morphology And Estrogen Concentrations Following A Reduction In Progesterone In Beef Cattle, Robert A. Taft Jr.

Graduate Theses, Dissertations, and Problem Reports (ETD)

Low dosages of progestogens promote persistent follicles, high systemic estrogen and low fertility. The objectives of this study were to determine effects of a reduction in progesterone on (1) morphology of oocytes and intrafollicular concentrations of estradiol. Cows on low progesterone (n = 12) received used intravaginal progesterone inserts on d 4 after estrus and prostaglandin (PG) F2alpha (25 mg, i.m.) on d 6. Control animals (n = 12) received saline on d 6. The oocyte and follicular fluid were recovered from the largest follicle on d 8 or d 10.;Serum estradiol was lower during d 4--6 but greater (P < .01) during d 7--10 in cows treated with progesterone inserts and PGF 2alpha while the largest follicle was larger in treated cows on day 10 only (14 vs. 12 mm; P < .05). Intrafollicular concentrations of estrogen were greater in treated than in control cows (990 +/- 87 vs 191 +/- 106; P < .01). Progesterone in follicular fluid (mean = 42 ng/ml) did not differ. Oocytes were observed in oocyte nuclear stage I in the control group on d 8. All other oocytes were in nuclear stage II. In addition, the degree of clumping of mitochondria, the percentage of intact cumulus cell processes and percentage of normally shaped mitochondria was greater in oocytes from d 8 control cows than in all other groups.;Changes in concentrations of estradiol and oocyte morphology typically associated with the preovulatory period had occurred within 2 d after a reduction in progesterone, even when low peripheral concentrations of progesterone were maintained. These earliest stages of oocyte maturation occurred in response to a reduction in progesterone. Similar changes in oocyte morphology were observed in control animals by d 10 of the estrous cycle, probably representing the onset of atresia.

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Milk Allergy/Intolerance In Infancy And Cognitive Functioning, Tina M. Yost Dec 1999

Milk Allergy/Intolerance In Infancy And Cognitive Functioning, Tina M. Yost

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examines the relationship between a history of milk A/I in infancy and intelligence in later childhood. Participants included 74 male and female children ages 3 years to 12 years, referred for psychological evaluation. Background information gathered from the primary caregiver included history of milk A/I in infancy. The Wechsler Scales of Intelligence provided information on the participants level of cognitive functioning. Findings were significant for both ANOVA and chi square analysis, with children in Group One (milk A/I) demonstrating lower IQ scores than children in Group Two (no milk A/I). The findings also suggest a relationship between milk …

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Explanatory Models Of Chronic Pain, Elizabeth Neely Thrush Dec 1999

Explanatory Models Of Chronic Pain, Elizabeth Neely Thrush

Graduate Theses, Dissertations, and Problem Reports (ETD)

Chronic pain is described as pain that persists for six months or longer. This type of pain may range from dull to excruciating and may be constant or sporadic. The purpose of this study was to explore the explanatory models of individuals living in chronic pain. The study sample included twelve adults, eleven women and one man, who have been diagnosed with the chronic pain condition Fibromyalgia. Using Arthur Kleinman's explanatory models as a framework, participants were personally interviewed regarding the physical, personal, and social causes and consequences of chronic pain. In order to elicit personal explanatory models, each participant …

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Effect Of Allopurinol And Hemin On Some Biological Markers Of Aging In Broiler Chickens, Dinesh Singh Rathore Aug 1999

Effect Of Allopurinol And Hemin On Some Biological Markers Of Aging In Broiler Chickens, Dinesh Singh Rathore

Graduate Theses, Dissertations, and Problem Reports (ETD)

Uric acid has been hypothesized as one of the most important antioxidants in limiting the accumulation of advanced glycolated endproducts in broiler breeder hens. This study was designed to quantitatively manipulate the plasma uric acid concentrations using hemin and allopurinol and determine its effect on skin pentosidine, shear force value of Pectoralis major muscle, plasma glucose, body and breast weight, and chemiluminescence induced oxidative stress in broiler chickens. Allopurinol decreased plasma uric acid, ranging from 26% to 74%, with the most pronounced effect at wk 22. Hemin increased plasma uric acid concentrations between 11 and 14%. Skin pentosidine levels increased …

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Associations Of Egg Production With The Major Histocompatibility Complex In Broiler Breeder Hens, Becky Jean Tarleton Aug 1999

Associations Of Egg Production With The Major Histocompatibility Complex In Broiler Breeder Hens, Becky Jean Tarleton

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study documents effects of the major histocompatibility complex (MHC) on reproductive traits in a flock of Cobb X Cobb broiler breeder hens. The objective was to determine if the MHC affects reproduction of non-congenic broiler breeder hens. Genomic DNA was isolated from 35 hens. Restriction fragment length polymorphism (RFLP) analysis was performed on each sample, using a chicken class II MHC probe (Xu et al. 1989). Restriction endonuclease digestion using PvuII resulted in polymorphisms in all birds. Five polymorphic bands were identified. The largest bands, 7.5 kb and 5.4 kb, were present in one and four hens respectively. The …

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Influence Of Selection For Breast Muscle Mass On Ph And Metabolism Of Supracoracoideus Muscle From Male And Female Turkey, John Kenneth Yost Aug 1999

Influence Of Selection For Breast Muscle Mass On Ph And Metabolism Of Supracoracoideus Muscle From Male And Female Turkey, John Kenneth Yost

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this study was to determine if selection for increased breast muscle mass has affected the supracoracoideus muscle's ability to regulate pH during physical activity in turkeys. The lightweight male line (LM) had the greatest breast muscle mass as a percent of body weight (p < 0.0001), a lower average pH (6.68; p < 0.0001), and greater Lactate Dehydrogenase (293 mmol NADH min-1mug-1 ; p < 0.0001) and Glyceraldehyde Phosphate Dehydrogenase (0.4452 mmol NADH min-1mug-1; p < 0.05) activities than the HM and FL lines. The LM line had the highest ratio (2.33:1) (p < 0.05) of adult to neonatal myosin. Hens had greater breast muscle mass as a percent of body weight than males (p < 0.0001), and a lower average pH (6.62; p < 0.05). This study showed that genetic selection for breast muscle mass resulted in an increased ratio of adult to neonatal myosin and an increased anaerobic capacity, which may predispose birds to a lower ultimate pH during physical activity.

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Effect Of Sward Height And Concentrate Supplementation On Forage Dry Matter Intake, Digestibility And Grazing Time Of Spring-Calving Beef Cows, Ondieki J. Gekara Aug 1999

Effect Of Sward Height And Concentrate Supplementation On Forage Dry Matter Intake, Digestibility And Grazing Time Of Spring-Calving Beef Cows, Ondieki J. Gekara

Graduate Theses, Dissertations, and Problem Reports (ETD)

To establish the effect of sward height (SH) and concentrate supplementation on performance of grazing cattle, twenty-four cross bred Angus beef cow-calves were randomly assigned to two SH treatments (4--8 or 8--11 cm) with three supplement levels: 6.24, 3.12 or 0 kg/d. The study was conducted in three periods (P): May (P1), June/July (P2) and August (P3) in 1996. There was no SH x supplement level x period or SH x supplement level interaction (P > .10) on forage DMI, DMD or grazing time (GT). Cows on low SH had greater (P < .08) DMI and GT (P < .01) than cows on high SH. Forage DMI, DMD and GT decreased (P < .05) with supplementation. Grazing efficiency declined with supplementation and advancing grazing season (P < .01). Cows consumed more forage DM (P < .01) in P1 and P2 than P3. Forage DMI and grazing efficiency decreased with supplementation suggesting that supplemented cattle can optimally be grazed at SH < 8 cm.

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Occurrence, Etiology And Management Of Ringwomb In Ewes, Nancy Jean Kerr Aug 1999

Occurrence, Etiology And Management Of Ringwomb In Ewes, Nancy Jean Kerr

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pedigrees of ewes with Ringwomb were studied to determine the etiology, incidence and treatment of Ringwomb. Purebred Suffolk and crossbred Hampshire and Shropshire ewes aged from one to seven years were observed over a period of five lambing seasons. The study was conducted on 24 clinical cases of ringwomb occurring in one flock. Ringwomb or incomplete cervical dilation accounted for an incidence of 20.5% (24/117) of all ewes lambing. The ewes affected were all daughters, granddaughters, or great-granddaughters of one particular sire used on the farm as a service sire. Because ringwomb does not typically affect ewes in two consecutive …

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Perceptions Of Students And Teachers Regarding Agriculture In Leflore County, Mississippi, Ronald L. Howard Aug 1999

Perceptions Of Students And Teachers Regarding Agriculture In Leflore County, Mississippi, Ronald L. Howard

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to assess the perceptions of public high school teachers and students in Leflore County, Mississippi regarding agriculture and provide baseline data regarding the perception of high school students and teachers residing in an agriculturally dependent county with no agricultural education program. A population of 240 high school teachers and students was surveyed for their perceptions regarding agriculture. All three public high schools in Leflore County were represented in this study. Over 65% of the sample resided in the city, while only 3% live on a farm. The major finding of this study was that …

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Experiences Of Selected West Virginia Agriculture Teachers Who Have Established Aquaculture Units In Their Schools And Have Taught Aquaculture Classes For Two Years Or More, Paul A. Lovett Aug 1999

Experiences Of Selected West Virginia Agriculture Teachers Who Have Established Aquaculture Units In Their Schools And Have Taught Aquaculture Classes For Two Years Or More, Paul A. Lovett

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was designed to ascertain and record the experiences of West Virginia agriculture teachers who have established aquaculture units in their schools and have taught aquaculture for two or more years. This study will provide suggestions to those who may yet integrate aquaculture into their curriculum.;A "Focused Interview" was used to gather qualitative data from eight-experienced aquaculture teachers. The respondents answered eight questions that were asked and recorded by the secretary in agricultural and environmental education at WVU to eliminate bias and improve the validity of this study.;The results of this study found that agricultural teachers used aquaculture to …

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What Is The Relationship, If Any, Between The Teacher -Perceived School Climate And The State Accreditation Status Of Elementary Schools In West Virginia?, Elaine Dellamea Gayton Aug 1999

What Is The Relationship, If Any, Between The Teacher -Perceived School Climate And The State Accreditation Status Of Elementary Schools In West Virginia?, Elaine Dellamea Gayton

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of the study was to determine if a significant relationship exists between teacher-perceived school climate and state accreditation of elementary schools in West Virginia. Teacher-perceived school climate was measured by the CFK School Climate Profile.;The sample consisted of 100 schools. Included were 53 randomly-selected elementary schools which earned full accreditation and 47 elementary schools which lacked full accreditation in 1998 due to results on the Stanford Achievement Test. The response rate was 65%. Statistical analysis of data occurred through t-tests and stepwise multiple regression with an alpha level of .05 applied.;Findings. The percentage of students eligible to receive …

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Acetaminophen Stimulates Proliferation Of Breast Cancer Cells, Eugenia Harnagea Theophilus Aug 1999

Acetaminophen Stimulates Proliferation Of Breast Cancer Cells, Eugenia Harnagea Theophilus

Graduate Theses, Dissertations, and Problem Reports (ETD)

Acetaminophen is a common analgesic/antipyretic. This research projected investigated the interaction of acetaminophen with breast cancer cells. The first goal was to determine if acetaminophen induces proliferation in cancerous and normal, human breast cells. Pharmacological concentrations of acetaminophen stimulated proliferation (3H-thymidine incorporation into DNA, % S phase cells, cell numbers) of estrogen and progesterone receptor positive (ER+/PR+) but not of ER-/PR+ or of ER-/PR- cancer or normal breast cells. The second goal was to determine if estrogen receptors play a role in acetaminophen-induced proliferation of ER+ breast cancer cells. Antiestrogens inhibited acetaminophen-induced proliferation, suggesting that ERs are involved in proliferation. …

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Effect Of Feeding Calcium Propionate On Carcass Composition, And Productive Performance Of Male Broilers, Robert Eric Jones Aug 1999

Effect Of Feeding Calcium Propionate On Carcass Composition, And Productive Performance Of Male Broilers, Robert Eric Jones

Graduate Theses, Dissertations, and Problem Reports (ETD)

Male broilers were fed ad libitum a control diet and diets with 1.5% and 2.7% calcium propionate (CaP). Broiler diets were supplemented with CaP for the first 2,4,6, or 8-week intervals. After being fed CaP for the previous mentioned times the broilers received a control diet for the remainder of each period. All broilers supplemented with CaP had lower body weights (p > .01). Fat pad weight was lower in CaP treated broilers slaughtered at 8 weeks of age (p > .01). Percent carcass fat was lower in CaP treated birds (p > .01). Percent carcass fat was lower in CaP treated birds …

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Effects Of Fermenten During The Dry And Early Lactation Periods Of Dairy Cows, Wellington Sifuna Mang'oli May 1999

Effects Of Fermenten During The Dry And Early Lactation Periods Of Dairy Cows, Wellington Sifuna Mang'oli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fermenten is a commercially available by-product of lysine production recommended by the manufacturer (Biovance Technologies Inc., Omaha, NE) as a protein source for growing heifers and lactating cows. It has not been used in the diets of dry cows within 4 weeks of parturition. Three groups of 10 cows each, balanced for breed (Ayrshire and Holstein) and parity, were assigned to diets containing 0, 0.73 and 1.45 kg Fermenten dry matter/day. The diets were fed from 4 weeks prior to expected calving through 6 weeks of lactation. Dry matter intake of all diets decreased prior to calving, with the treatments …

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Regulation Of The Synthesis And Protein Stability Of The Alternative Sigma Factor Rpos In Salmonella Typhimurium, Christofer Lee Cunning May 1999

Regulation Of The Synthesis And Protein Stability Of The Alternative Sigma Factor Rpos In Salmonella Typhimurium, Christofer Lee Cunning

Graduate Theses, Dissertations, and Problem Reports (ETD)

RpoS is an alternative sigma factor which is required for the expression of genes that help bacteria cope with environmental stress. The regulation of RpoS is multifactorial and occurs at the levels of synthesis and protein turnover. Our lab has previously identified a rpoS translation enhancing factor in Salmonella typhimurium, the RNA-binding protein HF-I. An antisense element consisting of rpoS mRNA secondary structure is predicted to sequester the rpoS ribosome binding site and inhibit translation. HF-I may interact with this element to increase translation. Using rpoS genetic fusions, we have shown that native rpoS promoters can be substituted with tac …

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Regulation Of Glucose -6 -Phosphate Dehydrogenase By Polyunsaturated Fatty Acids In Cultured Rat Hepatocytes, Laura Petrosky Stabile May 1999

Regulation Of Glucose -6 -Phosphate Dehydrogenase By Polyunsaturated Fatty Acids In Cultured Rat Hepatocytes, Laura Petrosky Stabile

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of this research is to understand the molecular mechanism(s) by which polyunsaturated fatty acids inhibit gene expression of the lipogenic enzymes. The model enzyme which we are using to study this phenomenon is liver glucose-6-phosphate dehydrogenase (G6PD). In order to determine if regulation of G6PD occurred at a transcriptional or a posttranscriptional step in rat hepatocytes, enzyme activity, mRNA accumulation and transcriptional activity of the G6PD gene were measured in the presence and absence of a polyunsaturated fatty acid, arachidonic acid. Insulin and glucose stimulated a 5- to 7-fold increase in G6PD activity and mRNA. This increase was …

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Measuring Fluoridated And Non-Fluoridated Sealant Fluoride Concentrations And Their Effect On Streptococcus Mutans: An In Vitro Study., Deborah Annette Bassham Jan 1999

Measuring Fluoridated And Non-Fluoridated Sealant Fluoride Concentrations And Their Effect On Streptococcus Mutans: An In Vitro Study., Deborah Annette Bassham

Graduate Theses, Dissertations, and Problem Reports (ETD)

Decalcification around brackets is a problem associated with plaque accumulation trapping caries producing bacteria, such as Streptococcus mutans (SM) and Lactobacilli acidophilus. The aim of this study was to measure 1)the concentration of fluoride released from three sealants: Protection TM Plus, Maximum Cure®, TransbondTM XT, and a glass ionomer, GC Fuji II 2) fluoride release of materials recharged with topical fluoride, 3) the ability of materials to inhibit SM, and 4) the degradation of materials by SM. A significant difference was found in fluoride released over 28 days between the four groups. There was no significant difference in the fluoride …

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The Need For Cancer Data Specific To American Indian And Alaskan Native Populations., Theda J. Mcpheron Keel Jan 1999

The Need For Cancer Data Specific To American Indian And Alaskan Native Populations., Theda J. Mcpheron Keel

Graduate Theses, Dissertations, and Problem Reports (ETD)

Cancer among American Indian and Alaskan Native populations has become a major health concern. Data needs is an issue that Nationwide directly impact cancer among these populations. This thesis focuses on the critical need for cancer data specific to tribal populations and identifies the barriers which impede its progress A literature review provides an overview of the major National data systems in place in relationship to cancer and tribal populations. To assess tribal persons and document their perspective concerning cancer data, a cross sectional inventory survey have been completed and is included. Comparisons have been made and conclusions focused in …

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Association Of Late Embryonic Mortality In Beef Cows With Concentrations Of Estradiol-17beta And Prostaglandin F(2)Alpha., Phillip J. Bridges Jan 1999

Association Of Late Embryonic Mortality In Beef Cows With Concentrations Of Estradiol-17beta And Prostaglandin F(2)Alpha., Phillip J. Bridges

Graduate Theses, Dissertations, and Problem Reports (ETD)

The relationship of luteal function and embryonic survival to concentrations of estradiol-17β or prostaglandin (PG) F2α was evaluated after induction of replacement corpora lutea (CL) in lutectomized beef cows maintained on flurogestone acetate (FGA). On day 26 of pregnancy the CL was enucleated, and the ovary contralateral to the gravid uterine horn was removed. Pregnancy was maintained initially by the administration of FGA (6 mg, s.c.) every 12 h, beginning 12 h before lutectomy. Between days 28 and 31, when a follicle had grown to 10 mm in diameter, cows were treated with hCG (1000 IU, i.m.) to induce formation …

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Rural Women And Economic Survival Strategies In The Former Bantustans: A Case Study From The Northwest Province, South Africa., Amy Danielle Pratt Jan 1999

Rural Women And Economic Survival Strategies In The Former Bantustans: A Case Study From The Northwest Province, South Africa., Amy Danielle Pratt

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research examines the role of gender in African women’s economic co-operatives in the Northwest Province of South Africa. The theoretical frameworks of feminist geography and gender and development reveal the interconnections between issues of women, work, and rural economic development. Background information is presented to illustrate the complexities of rural African women’s economic exclusion under apartheid and today, and a case study approach is utilized to reveal the development and viability of two particular economic co-operatives. Issues concerning the organization, membership, production, and markets of the two co operatives are discussed, as well as the relationship between the co-operatives …

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The Effects Of Land-Use History On Plant Species Diversity And Abundance In Dambo Wetlands In Zimbabwe., Fortune Feresu Shonhiwa Jan 1999

The Effects Of Land-Use History On Plant Species Diversity And Abundance In Dambo Wetlands In Zimbabwe., Fortune Feresu Shonhiwa

Graduate Theses, Dissertations, and Problem Reports (ETD)

Land-use history in Zimbabwe has caused dramatic differences in erosion severity between Commercial and Communal Lands. High population numbers have been found to be positively correlated with the extent of eroded area in Communal Lands. Dambo wetlands are particularly vulnerable to this population pressure as they are isolated wet areas supporting plant growth during the six to eight months of the dry season. In Zimbabwe, they cover 1.3 million hectares of the country. This study examines the plant composition and seed bank of these wetlands and compares vegetation in dambos with contrasting land-use histories, communal versus commercial. Communal Lands are …

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The Use Of Analog Functional Analysis In Assessing The Function Of Mealtime Behavior Problems., Peter Anthony Girolami Jan 1999

The Use Of Analog Functional Analysis In Assessing The Function Of Mealtime Behavior Problems., Peter Anthony Girolami

Graduate Theses, Dissertations, and Problem Reports (ETD)

Some children exhibit disruptive and self-injurious behavior during mealtime, limiting the positive interaction between care giver and child, and decreasing the probability of a nutritionally adequate intake. Research has demonstrated the utility of functional analysis (i.e., identifying controlling variables of problem behavior) for the development of effective non-aversive interventions for a variety of behavior problems. This study applied the methodology of an analog experimental (functional) analysis of behavior to the specific interaction between care givers and children exhibiting mealtime behavior problems. Five conditions that resemble feeding situations were constructed to identify contingent relations between the mealtime behavior problems exhibited by …

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Effect Of Maturity And Divalent Salts On Quality Of Low-Fat, Low-Sodium Restructured Beef., Sharon L. Pojedinec Jan 1999

Effect Of Maturity And Divalent Salts On Quality Of Low-Fat, Low-Sodium Restructured Beef., Sharon L. Pojedinec

Graduate Theses, Dissertations, and Problem Reports (ETD)

Manipulation of product formulation protocols and ingredients to optimize texture development and processing yields provides opportunity to produce high quality, low sodium, low-fat restructured beef. The objective of this experiment was to determine effect of preblending with MgCl2 and/or CaCl2 on functionality of A- and C-maturity, in low-sodium, low-fat restructured beef. Addition of CaCl2 decreased (p< 0.001) raw and cooked pH. For both maturities, raw products with CaCl2 had more soluble protein (p< 0.05) than products without CaCl2. C-maturity products contained more soluble myosin (p< 0.10) than A-maturity products. In C-maturity treatments, MgCl2 increased (p< 0.005) myosin solubility. Products with CaCl2 decreased (p< 0.01) actin solubility. In A-maturity products, MgCl2 had less (p< 0.05) soluble actin than treatments without MgCl2. In C-maturity products, MgCl2 contained more (p< 0.05) soluble actin than treatments without MgCl2. Addition of CaCl2 decreased (p< 0.005) cook yield and addition of MgCl2 increased (p< 0.005) cook yield. In C-maturity products, treatments without CaCl2 had a higher (p< 0.0005) peak force than treatments without CaCl2 in A maturity products. In A-maturity products, treatments without MgCl2 had lower (p< 0.005) peak force than the same treatment in C-maturity products and lower (p< 0.05) than MgCl2 containing treatments. C-maturity products were more cohesive (p< 0.08) than A-maturity. Addition of CaCl2 increased (p< 0.05) cohesiveness and added MgCl2 decreased (p< 0.05) cohesiveness. Addition of MgCl2 and CaCl2 and beef maturity affect protein-water interactions and texture development of low-sodium, low-fat restructured beef.

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Preschool Teaching Experience And Special Education Support Systems: A Survey Of Western Pennsylvania., Stephanie Ann Sterling Jan 1999

Preschool Teaching Experience And Special Education Support Systems: A Survey Of Western Pennsylvania., Stephanie Ann Sterling

Graduate Theses, Dissertations, and Problem Reports (ETD)

A regional descriptive study was conducted in Western Pennsylvania, throughout a five county area. Preschool teachers (N= 80, return rate 23.7%) of three and four year old children were surveyed to gain descriptive information about their preparation and training as a preschool teacher and their experience with preschool children with disabilities in their classrooms. Results indicate that most teachers have a Bachelors degree although many did not have this degree in early childhood education. It was found that almost every preschool has at least one child with disabilities enrolled in its program, but only half of the preschool teachers surveyed …

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An Analysis Of Science- And Technology-Related Health Assistance Provided To Lesser Developed Nations From 1985 To 1995., Robin C. Spitznogle Jan 1999

An Analysis Of Science- And Technology-Related Health Assistance Provided To Lesser Developed Nations From 1985 To 1995., Robin C. Spitznogle

Graduate Theses, Dissertations, and Problem Reports (ETD)

The problem of this research was to analyze science- and technology-related health assistance provided to Third World nations between 1985 and 1995 by four donor agencies: Ford and Rockefeller Foundations, USAID, and World Bank. The research examined health assistance in terms of (1) the number and value of projects by region, sub-region, and country; (2) the amount of assistance provided by individual donor agencies; (3) the types of projects initiated; and (4) the impact that these projects had on 8 health-related and 1 economic-related indicator in selected countries. A total of 610 health projects, valued at $1.6 billion, were identified. …

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The Effects Of Aluminum And Nitrogen On Mycorrhizal And Non-Mycorrhizal Tulip Poplar., Heidi Brauer Lux Jan 1999

The Effects Of Aluminum And Nitrogen On Mycorrhizal And Non-Mycorrhizal Tulip Poplar., Heidi Brauer Lux

Graduate Theses, Dissertations, and Problem Reports (ETD)

Elevated levels of acidic deposition are leading to higher concentrations of aluminum (Al) in the soil solutions of some forest ecosystems. For this thesis, I performed a suite of experiments to investigate the effects of four interconnected factors on the growth and nutrition of Liriodendron tulipifera L. (tulip poplar): 1. Al exposure in solution; 2. mycorrhizal presence and percent colonization; 3. N source ratio; and 4. N level. My studies of L. tulipifera demonstrate a sensitivity to Al at concentrations as low as 100 µM, ranking it among the most Al sensitive tree species ever studied. Selected Al tolerant species …

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