Life Sciences Commons^™

Phosphorus Requirements Of Grow-Finish Pigs Raised In A Commercial Environment (2002), C W. Hastad, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

We conducted three experiments to identify available phosphorus (aP) requirements of pigs reared in commercial facilities. In a pilot study (Exp. 1), 600 gilts (PIC, initially 95.2 lb) were randomly allotted to a low or high dietary P regimen in a 98-d study. Pigs were phase-fed six diets from 95 to 106, 106 to 150, 150 to 183, 183 to 212, 212 to 245, and 245 to 267 lb. Corresponding aP concentrations were: 0.30, 0.28, 0.27, 0.27, 0.24, and 0.19% (low) and 0.37, 0.33, 0.30, 0.28, 0.27, and 0.26% (high). No differences were observed (P>0.10) in ADG and overall …

Effects Of Increasing Lysine:Calorie Ratio In Pigs Grown In A Commercial Finishing Environment (2002), R G. Main, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Seven experiments using 7,801 pigs (75 to 265 lb) were conducted to determine the biologic and economic effects of increasing dietary lysine in commercially reared grow-finish pigs. Each study was generally 28 d long and evaluated a different weight range of the grow-finish period for barrows (3 trials) and gilts (4 trials), respectively. All studies contained six dietary treatments of incrementally increasing lysine:calorie ratio. The primary response criteria measured were growth, carcass, and economic performance. Pigs fed high-energy diets in early finishing (<150 lb) have only moderate biological responses to a wide range of dietary lysine. However, increasing dietary lysine levels in late finishing (>150 lb) has more quantitatively significant effects on growth and carcass performance. Due the magnitude of the …

Supplementation Of L-Carnitine And Paylean Improve Growth Performance Of Pigs In A Commercial Finishing Facility (2002), B W. James, K Q. Owen, J C. Woodworth, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Our previous experiments evaluating the interactive effects of dietary L-carnitine and Paylean have primarily focused on improved meat quality benefits of feeding carnitine in combination with Paylean. Although there were numeric trends for improved growth performance in the previous experiments conducted at university facilities, the responses were not statistically significant. A recent study conducted in a commercial finishing facility demonstrated improved growth performance in pigs fed carnitine for the 4-week period prior to slaughter. The cause for the growth response observed in the commercial facility compared to the two previous studies conducted at a university research facility may have been …

Interactive Effects Among L-Carnitine, Paylean (Ractopamine⋅Hcl), And Dietary Energy Density On Commercial Finishing Pig Growth Performance And Carcass Characteristics (2002), B W. James, K Q. Owen, J C. Woodworth, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

Growth performance and carcass characteristics were evaluated on 1,104 pigs fed combinations of L-carnitine, Paylean, and added fat in a 2 × 2 × 2 factorial arrangement. Dietary treatments of L-carnitine (0 or 50 ppm) and fat (0 or 6%) were initiated at approximately 97 lb. Paylean (0 or 9 g/ton) was fed for the last 4 weeks prior to market. Supplementing dietary carnitine did not affect (P>0.25) growth performance of pigs between 97 to 203 lb. The addition of 6% dietary fat improved (P<0.01) ADG and F/G during this period. During the last 4 weeks of the experiment, when Paylean was fed, a carnitine × Paylean interaction was observed (P<0.04) for ADG and F/G. Both carnitine and Paylean improved growth performance; however, the responses were not additive. Pigs fed added fat had improved (P<0.05) feed efficiency during the Paylean supplementation period. A carnitine × Paylean interaction (P<0.03) was observed for fat thickness and percentage lean. Fat thickness decreased and lean percentage increased in pigs fed carnitine or Paylean, but the responses were not additive. Pigs fed added fat had greater (P<0.01) fat thickness and lower percentage lean than pigs not fed added fat. A carnitine × Paylean × fat interaction was observed (P<0.04) for longissimus muscle area. In general, adding carnitine, Paylean or fat to the diet increased longissimus muscle area; however, the responses were not fully additive. Carcass weight was greater (P<0.01) for pigs fed 6% added fat and tended (P<0.07) to be greater for pigs fed carnitine. Adding Paylean to the diet increased (P<0.04) ultimate longissimus pH and reduced drip loss as measured by the filter paper method. Similar to other experiments, adding carnitine to the diet tended to decrease drip loss (P<0.06) as measured by the suspension method. These results suggest that adding Lcarnitine and Paylean to the diet increases ADG and that L-carnitine, Paylean, and fat improve feed efficiency when fed to late finishing pigs reared in a commercial facility. These data also support our previous research that demonstrated improvements in carcass characteristics of pigs fed L-carnitine.; Swine Day, Manhattan, KS, November 14, 2002

Effects Of Soybean Meal Source And Level On Growth Performance Of Weanling Pigs (2002), K R. Lawrence, C W. Hastad, S M. Hanni, M G. Young, M J. Webster, M R. Barker, B W. James, C N. Groesbeck, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 525 weanling pigs (initially 13.0 lb) were used in two experiments to evaluate the effects of soybean meal source and level on growth performance of early weaned pigs. In both experiments, dietary treatments included a control diet containing no soybean meal, or diets containing 20% or 40% of either solvent extracted soybean meal (SBM) or extruded-expelled soybean meal (EESoy). In Exp. 1, diets were formulated with NRC (1998) nutrient values for the solvent extracted soybean meal and previously determined values (1998 KSU Swine Day Report of Progress) for the extruded-expelled soybean meal. In Exp. 1, from d …

Evaluation Of Wheat Gluten And Spray-Dried Animal Plasma On Growth Performance Of Nursery Pigs (2002), K R. Lawrence, C W. Hastad, S M. Hanni, M R. Barker, B W. James, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen, Joel M. Derouchey, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 440 weanling pigs (initially 14.3 lb) were used in two studies to evaluate the effects of increasing wheat gluten (WG) and spray-dried animal plasma (SDAP) on growth performance of early weaned pigs. In Exp. 1, the six dietary treatments included a negative control, containing no wheat gluten or animal plasma, the control diet containing either 3, 6, 9, or 12% lightly modified spray-dried wheat gluten, and a positive control diet containing 5% spray-dried animal plasma. The diets containing 9% WG and 5% SDAP had the same amount of soybean meal to make a direct comparison of the …

The Optimal True Ileal Digestible Threonine Requirement For Nursery Pigs Between 24 To 49 Lb (2002), B W. James, J L. Usry, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A 22-d growth assay was conducted to determine the appropriate true ileal digestible threonine requirement to maximize growth performance of pigs between 24 and 49 lb. The 10 experimental treatments consisted of two basal diets (1.1% and 1.2% true ileal digestible lysine; 16.1% and 17.4% CP) with increasing levels of threonine (50, 55, 60, 65, 70% threonine:lysine). Pigs fed 1.2% true ileal digestible lysine had improved ADG and F/G compared to pigs fed 1.1% lysine, this suggest that the requirement was greater than 1.1% true ileal digestible lysine. There was a threonine × lysine interaction for feed efficiency. Pigs fed …

Effect Of Dose Of Chlorate On Growth Performance Of Nursery Pigs (2002), T E. Burkey, J Ernest Minton, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A 14-day growth study was conducted to evaluate the effects of feeding varied levels of chlorate on weanling pig growth performance. A previous experiment with weanling pigs fed diets containing added chlorate (800 ppm) resulted in numerical decreases in ADG, ADFI and F/G as compared to diets with no added antimicrobial, a commonly used antimicrobial (carbadox), or another feed additive, mannanoliogsaccharide. The negative effects of feeding 800 ppm chlorate were confirmed in this study. Additionally, the current trial demonstrated that pigs fed diets containing 200 ppm sodium chlorate had greater ADG, ADFI, and d 14 average weights than pigs fed …

Effect Of Dexamethasone Injection At Birth On Growth Performance Of Pigs From Birth To Weaning (2002), M G. Young, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen, Steven S. Dritz

Kansas Agricultural Experiment Station Research Reports

A total of 82 litters were used in a 21-day study to evaluate the effect of injecting litters of pigs with dexamethasone within 24 hours of birth on growth rate from birth to weaning. Experimental treatments consisted of an injection of 1 mg dexamethasone solution (2mg/mL, Prolab Ltd, St. Joseph, MO) to all pigs within a litter, while pigs in control litters did not receive a dexamethasone injection. There was no difference in growth rate from birth to weaning between pigs injected with dexamethasone and control pigs. Number of pigs weaned per litter and preweaning mortality were not different. In …

Cyclomorphosis Of Daphnia Lumholtzi In Response To Spatial Heterogeneity In Lake Taylorville, Karen K. Schnake

Masters Theses

Reservoir zonation occurs longitudinally as water enters from a stream into an impoundment. Inflow areas (or riverine zones) are typified by high flow rate and shallow depth whereas areas near the dam (lacustrine zones) characteristically have decreased flow and greater depth. In a typical reservoir, abiotic and biotic variables change somewhat predictably along a continuum from the riverine, through a transitional and into a lacustrine zone which can have a significant affect on the biota. Daphnia lumholtzi, a cladoceran which exhibits extreme cyclomorphosis, is an exotic species introduced to North America within the past twenty-five years. I examined the morphology …

Colony Composition And Demographics Of Beavers In Illinois, Stanley T. Mctaggart

Masters Theses

Beavers (Castor canadensis) have been extensively studied throughout North America, but little research has been conducted on this species in Illinois and the Midwest. Beavers exhibit wide variations in colony composition and demographics over their broad geographic range, so regional research is important for sound management. The objectives of this study were to investigate the: (1) typical composition of beaver colonies in Illinois; (2) reproductive potential of female beavers in Illinois; (3) sex-age composition of beaver populations in Illinois; and (4) efficacy of night-vision surveys versus removal trapping for estimating colony size. This study was conducted during the 1999-00 and …

Effects Of E2 On Apoe Secretion And Neurite Outgrowth In Cultured Adult Mouse Cortical Neurons, Fei Shen

Masters Theses

Estrogen replacement therapy appears to delay the onset of Alzheimer's disease (AD). The mechanism whereby estrogen prevents the pathogenesis of AD is unknown. In the present study, I examined the effects of 17-β-estradiol (E2) on neurite outgrowth from adult mice cortical neurons (AMC) in culture. I found that E2 increases apoE secretion and neurite outgrowth in AMC neurons from wild type mice in a dose dependent fashion. The neurite outgrowth promoting effect of E2 was not observed in AMC neurons derived from age-, sex-, and stain-matched apoE deficient/apoE gene knockout (apoE KO) mice. Furthermore, E2 has isoform specific effects on …

Modulation Of Apolipoprotein E Expression And Glial Activation In Mouse Olfactory Bulb During Estrous Cycle: An Immunohistochemical Study, Matthew Kircher

Masters Theses

Estrogen (E2) plasma levels fluctuate as a function of estrous cycling in the mouse. Apolipoprotein E (apoE) mRNA has been shown to increase in both hippocampal astrocytes and microglia during proestrus when plasma estrogen levels are high. The current study was designed to evaluate apoE localization and glial activation in mouse olfactory bulb (OB) as a function of the estrous cycle. In the rat OB, estrogen receptor β (ERβ) is present in the glomerular and external plexiform layers, but not the internal plexiform and granule cell layers. Normal female mice 2-3 months old at the start of the study were …

Regional Specific Brain Apoe Modulation By The Estrous Cycle And Exogenous Estrogen, Emily Rosario

Masters Theses

Previous studies have demonstrated that 17β-estradiol can modify apolipoprotein E (apoE) expression. I found that apoE protein varied as a function of the estrous cycle and 17β-estradiol (E2) in a region specific manner in the mouse brain. I also found that apoE concentration was lowest on estrus in the hippocampus, cingulate cortex and frontal cortex; apoE concentration was highest on estrus in the olfactory bulb and cerebellum. No changes in apoE were found in the striatum throughout the estrous cycle. Exogenous E2 significantly raised tissue levels in the olfactory bulb and cerebellum, but did not increase apoE in cortical samples …

Mitochondrial Dna And Microsatellite Genetic Variation Of Dollar Sunfish (Lepomis Marginatus), Nancy A. Schable

Masters Theses

Dollar sunfish (Lepomis marginatus) at the Savannah River Site were sampled from two radiocesium contaminated ponds with a history of thermal elevation and from reference ponds with no history of radioactive or thermal contamination. Fluorescent sequencing of a portion of the mitochondrial control region showed no genetic variation within or between populations. Centrarchidae microsatellite loci Lma 120 (6 alleles, N=124 from 5 populations), Lma 20 (10 alleles, N=37 from 3 populations) and Rb 7 (14 alleles. N=17 from 2 populations) were variable for dollar sunfish. An additional 9 microsatellite primer pairs were designed for dollar sunfish. Testing of the designed …

Phylogeography And Genetic Diversity Of The Seal Salamander (Desmognathus Monticola), Erin D. Casey

Masters Theses

Phylogeography is defined as the spatial distribution of taxa with respect to geologic and geographic events. It is well documented that the distributions of many taxa have been affected by glacial events during the Pleistocene Era. The patterns generated can be very complex and result from shifts in climate and/or vegetation.

The Seal salamander, (Desmognathus monticola), is one species that still has questions pertaining to its phylogeography. The range of this species extends from southwestern Pennsylvania to northern Alabama and Georgia, with a highly disjunct, state-endangered population in the Red Hills of Alabama. The main goal of this study …

Reproductive Biology Of Stylisma Pickeringii (Convolvulaceae), An Endangered Plant Of Illinois Sand Prairies, Brent L. Todd

Masters Theses

The sand prairie is a unique ecosystem in the state of Illinois, being the habitat for many interesting plants and animals not found elsewhere in the state. One such plant is the state-endangered Stylisma pickeringii (Torr. ex M.A. Curtis) Gray var. pattersoni (Fern. & Schub.) Myint (Convolvulaceae), also known as Patterson's bindweed or Patterson's dawn flower. It currently is found in only three Illinois counties—Cass, Henderson, and Mason. Presently, two of the three populations of S. pickeringii are located on private lands. Very little information is known about the reproductive biology of S. pickeringii var. pattersoni. Thus, the purpose of …

Aging Coyotes Using Dental Characteristics, Michelle Maher

Masters Theses

The accepted methods of age determination in the coyote (Canis latrans) are either highly subjective and unquantifiable or expensive and require the extraction of the canine tooth. Since neither of these methods are ideal, their limitations have impeded research on this species. Therefore, it was my objective to (1) develop and test the accuracy and precision of a descriptive key based on tooth wear patterns on the lower canine tooth, (2) develop and test the reliability of multiple regression models for aging coyotes using measurements from extracted teeth, and (3) suggest criteria for improving the consistency of results …

The Effects Of Habitat Fragmentation On Fish Developmental Stability, Matthew W. Gosses

Masters Theses

In nature, organisms exist in less than ideal conditions making stress a constant factor throughout their life. These stressful environments may disturb developmental processes, causing long-term, detrimental changes to an organism expressed as bilateral variation in morphology or fluctuating asymmetry (FA). Fluctuating asymmetry has been shown to be associated with accidents during morphogenesis due to environmental factors and hence is considered a measure of developmental instability.

One environmental stressor that may affect aquatic organisms is stream habitat fragmentation. Stream habitat fragmentation is the lack of connectivity between upstream and downstream populations or sites. Stream fragmentation can create distinct patches of …

The Effect Of Exercise Ball Training On Balance In Older Adults, Stephanie Happ

Masters Theses

Prevention of falls through balance training is of great interest to the aging population. Falls can cause debilitating injuries, such as fractures, and can also lead to the beginning of a series of health complications. These resulting complications can cause the older individual to become feeble, and susceptible to future recurring falls. There is no previous research on the effects of Swiss Ball exercises on the balance of older adults. The purpose of this study was to evaluate the efficacy of an exercise regimen involving the use of Swiss Balls to improve the balance of older adults.

Eleven apparently healthy …

Effects Of Indoleacetic Acid And Kinetin On Lipid Peroxidation Levels In Various Rat Tissues, İsmai̇l Çeli̇k, Yasi̇n Tülüce, Necati̇ Özok

Turkish Journal of Biology

This study was carried out to investigate whether plant growth regulators (PGRs) could affect lipid peroxidation (Malondialdehyde = MDA level) in erythrocyte, muscle, liver, heart and kidney tissue. Eighteen Sprague-Dawley albino rats were divided into three experimental groups: control and PGR-treated (indoleacetic acid and kinetin). Seventy-five ppm of PGRs, indoleacetic acid (IAA), and kinetin were administered orally to 6 rats ad libitum for 25 days. The hormone treatments caused different effects on the level of malondialdehyde (MDA) to those of the control rats. According to the results, while liver and kidney MDA levels were increased significantly by IAA administration in …

Antimicrobial Peptides: A Potential Therapeutic Alternative For The Treatment Of Fish Diseases, Ali̇ye Sarmaşik

Turkish Journal of Biology

Fish losses from infectious diseases are a significant problem in aquaculture worldwide. However, peptide antibiotics show potent activity against a broad range of pathogens including fish pathogens. Therefore, the ability of antimicrobial peptides to protect fish against infections caused by fish pathogens clearly shows the potential for utilisation of antimicrobial peptides for the treatment of fish diseases. The strategy of overexpressing the antimicrobial peptide genes in transgenic fish may provide a method of decreasing fish disease problems in aquaculture.

Some Properties Of Crude Carboxymethyl Cellulase Of Aspergillus Niger Z10 Wild-Type Strain, Gökhan Coral, Burhan Arikan, M. Ni̇sa Ünaldi, Hati̇ce Güvenmez

Turkish Journal of Biology

A carboxymethyl cellulase enzyme was prepared from a wild type strain of Aspergillus niger Z10. Analyses of the enzyme preparation by SDS-PAGE revealed two protein bands showing cellulolytic activity. The molecular weight of these bands was estimated to be around 83,000 and 50,000. The optimum temperature of the enzyme was observed to be around 40 °C. It was found that the enzyme's activity has a broad pH range between 3 to 9 and 41.2% of the original activity was retained after heat treatment at 90 °C for 15 min.

Production Of Poly-B-Hydroxybutyrate (Phb) By Some Rhizobium Bacteria, Nazi̇me Mercan, Belma Aslim, Zehra Nur Yüksekdağ, Yavuz Beyatli

Turkish Journal of Biology

In this study, the production of Poly-b-hydroxybutyrate (PHB) was determined in 1 Rhizobium japonicum, 6 Rhizobium cicer, 8 Rhizobium spp. and Bradyrhizobium japonicum USDA 110. The content of according to dry cell weight was determined to be 1.38-40.0%. In our study, Rhizobium spp. 2426, which produced the highest percentage yield of PHB, and Rhizobium spp. 640, which produced the intermediate percentage yield of PHB, were first selected among all the strains, and then the effect of different carbon and nitrogen sources on PHB production in these strains was tested. While the strains produced less PHB in yeast extract mannitol (YEM) …

Epipelic And Epilithic Algae Of The Yedigöller Lakes (Erzurum-Turkey), Bülent Şahi̇n

Turkish Journal of Biology

The epipelic and epilithic algae of the Yedigöller Lakes were studied qualitatively between June and September 2001. As a result 90 taxa (43 belonging to Bacillariophyta, 33 to Chlorophyta, 11 to Cyanophyta and three to Euglenophyta) were determined. Based on the algal community composition, the Yedigöller Lakes can be characterized as oligotrophic.

Effects Of Gibberellic Acid Treatment For Pollen Sterility Induction On The Physiological Activity And Endogenous Hormone Levels Of The Seed In Safflower, Hasan Baydar

Turkish Journal of Biology

In this research, our aim was to determine the effects of gibberellic acid, which was applied to safflower plants (Carthamus tinctorius L. cv. Dinçer 5-118) for pollen sterility induction, on some physiological activity and endogenous hormone levels of the seeds. Exogenously applied gibberellic acid (GA_3) strongly influenced the endogenous hormone levels of the seeds by decreasing the levels of GA_3 and zeatin, and increasing the levels of indole-3-acetic acid (IAA) and abscisic acid (ABA). The lowered endogenous GA_3/ABA and zeatin/IAA ratios in the seeds significantly decreased the germination percentage and hypocotyl elongation, respectively. The seeds from GA_3 treated plants had …

The Role Of Phospholiphase D In Phospholiphid Transaction During Cotton Seeds Maturation, Muborak Mahmusovna Abdullaeva, Mamura Muhamedovna Mulladganova, Mirzalievna M. Umarova

Turkish Journal of Biology

The role of phospholipase D (EC 3.1.4.4) was studied in the changing of phospholipid content during cotton seed (Gossipium hirsutum 108-G) maturation. To define phospholipase D activity cotton seed homogenates were incubated in a water-methanol environment at 37 °C for various time intervals (15, 30, 60, 120, and 300 min). Enzyme activity was judged from the formation of hydrolysis products - phosphatidic acid and phosphatidylmethanol. The phospholipid content was defined by using thin-layer chromatography with a follow up analysis of phosphorus quantity in phospholipid fractions. It was shown that phospholipase D displayed two functions during cotton seed maturation: transferase and …

Effects Of Nonequilibrium Atmospheric Pressure Plasmas On The Heterotrophic Pathways Of Bacteria And On Their Cell Morphology, Mounir Laroussi, J. Paul Richardson, Fred C. Dobbs

OES Faculty Publications

To date, most research on the interaction of nonequilibrium, atmospheric pressure plasma discharges with bacteria has concentrated on the germicidal effects. Therefore, published results deal mainly with killing efficacy and little attention is given to physical mechanisms and biochemical pathways and their potential alterations when cells of microorganisms are exposed to the plasma. In this letter, an attempt to investigate the effects of plasma exposure on the biochemical pathways of bacteria is presented. In addition, using electron microscopy, we investigate if any gross morphological changes take place when cells are exposed to a lethal dose of plasma. We are testing …

"A New Genus And New Species Of Freshwater Crab From Socotra Island, Yemen" , Neil Cumberlidge, Wolfgang Wranik

Journal Articles

No abstract provided.

Decomposition Dynamics In Restored And Naturally Recovering Atlantic White Cedar (Chamaecyparis Thyoides) Wetlands, Edward Ratcliffe Crawford

Biological Sciences Theses & Dissertations

Restoration efforts and ecologically based management practices for Atlantic white cedar wetlands have recently focused on soil organic matter sequestration and aggradation as critical ecosystem functions in the maintenance of this imperiled community type. This work addresses how developmental stage, litter quality and environmental conditions influenced above ground leaf litter and below ground root decay in naturally regenerating and restored Atlantic white cedar wetlands. Using standard litterbags for leaf litter and a modified litterbag technique for roots, decay dynamics of naturally regenerating and restored Atlantic white cedar stands were measured to compare ecosystem development trends with restoration conditions. Effects on …