Life Sciences Commons^™

Osteology, Morphology, And Female Choice In Species Of The Genus Cynolebias (Cyprinodontiformes: Rivulidae), Marcelo Loureiro Barrella

Master's Theses

Relationships among the species of the annual fish Cynolebias are unclear. An analysis of the utility of different osteological and morphological characters for phylogenetic analyses was done using clear and double stained specimens and measurements of morphometric parameters respectively. Scanning electron microscopy was used to study the morphology of the egg chorion. Female choice tests were also conducted to test male traits that may be preferred by females. The osteological analysis showed that some characters previously unreported may be phylogenetically useful. Head scalation patterns were found to be intraspecifically variable, making them inappropriate to use in systematics. Each morphometric parameter …

Feasibility Of Stocking Grass Carp (Ctenopharyngodon Idella; Cyprinidae) To Control Hydrilla (Hydrilla Verticillata; Hydrocharitaceae) In Lake Anna, Virginia, Paul Matthew Overton

Master's Theses

The goal of this study was to demonstrate the feasibility of using triploid ·Ctenopharvngodon idella (grass carp) to control Hydrilla verticillata in the Waste Heat Treatment Facility (WHTF) in Lake Anna, Virginia. The four objectives were to determine: the frequency of occurrences of grass carp over hydrilla; the proportions of hydrilla to other aquatic macrophytes in the guts of grass carp; effects of physical and chemical factors on movement of grass carp; and a theoretical stocking rate of grass carp for the WHTF. Frequency of occurrence of grass carp over hydrilla was calculated to be 84% and correlated with impoundment …

Abiotic Stress And The Relative Importance Of Interference And Facilitation In Montane Bunchgrass Communities In Western Montana, John T. Greenlee, Ragan M. Callaway

Biological Sciences Faculty Publications

No abstract provided.

Arkansas Rice Research Studies 1995, R. J. Norman, B. R. Wells

Arkansas Agricultural Experiment Station Research Series

The research reports in this publication represent one year of results; therefore, these results should not be used as a basis for long-term recommendations. Several research reports in this publication dealing with soil fertility also appear in Arkansas Soil Fertility Studies 1995 , Arkansas Agricultural Experiment Station Research Series 450. This duplication is the result of the overlap in research coverage between the two series and our effort to inform Arkansas rice producers of all the research being conducted with funds from the rice check-off. Use of products and trade names in any of the research reports of this publication …

An Animal Model For Development Of Pulpal Inflammation, John W. Masters

Loma Linda University Electronic Theses, Dissertations & Projects

Several animal models have been proposed to develop pulpal inflammation. Procedures recommended in these models have many variables and have not produced consistent results. The purpose of this study was to create pulpal inflammation using the Nd:YAG laser.

Forty-five cuspids of 12-18 month old beagle dogs were lased at 5, 7.5, and 10 watts (W) for 20 seconds with a 600 micron contact probe. Five cuspids were not lased but were used as controls. Following laser application, the teeth were extracted at intervals of 3, 7, and 30 days. They were then fixed in 10% formalin, decalcified, sectioned, and stained …

Interleukin-10 Inhibits Tumor Metastasis Through An Nk-Cell Dependent Mechanism, Li-Mou Zheng, David M. Ojcius, F. Garaud, C. Roth, E. Maxwell, Z. Li, H. Rong, J. Chen, X. Y. Wang, J. J. Catino, I. King

All Dugoni School of Dentistry Faculty Articles

Interleukin-10 (IL-10) is a recently described pleiotropic cytokine secreted mainly by type 2 helper T cells. Previous studies have shown that IL-10 suppresses cytokine expression by natural killer (NK) and type 1 T cells, thus down-regulating cell-mediated immunity and stimulating humoral responses. We here report that injected IL-10 protein is an efficient inhibitor of tumor metastasis in experimental (B16-F10) and spontaneous (M27 and Lox human melanoma) metastasis models in vivo at doses that do not have toxic effects on normal or cancer cells. Histological characterization after IL-10 treatment confirmed the absence of CD8+ and CD4+ T cells and macrophages at …

The Flora And Ecology Of Seidman Park, Kent County, Michigan, Pamela J. Laureto

Masters Theses

A floristic study of Seidman Park, Kent County, Michigan was performed. The study identified 521 vascular plants belonging to 96 families and 284 genera. The plant communities of Seidman Park were delimited by identification of dominant species and observation of the physical environment. It was believed that communities existed within the upland forest that could not be identified by observation alone. The use of Non-Metric Multidimensional Scaling (NMS) ordination techniques identified three communities within the upland forest. These were a xeric community, a dry-mesic community and a nutrient-rich community. Three sub-communities of the dry-mesic community were also identified.

The Bacillus Thuringiensis Insecticidal Toxin Binds Biotin-Containing Proteins, Cheng Du, Kenneth Nickerson

Papers in Microbiology

Brush border membrane vesicles from larvae of the tobacco hornworm, Manduca sexta, contain protein bands of 85 and 120 kDa which react directly with streptavidin conjugated to alkaline phosphatase. The binding could be prevented either by including 10 μM biotin in the reaction mixture or by prior incubation of the brush border membrane vesicles with an activated 60- to 65-kDa toxin from Bacillus thuringiensis HD-73. The ability of B. thuringiensis toxins to recognize biotin-containing proteins was confirmed by their binding to pyruvate carboxylase, a biotin-containing enzyme, as well as to biotinylated ovalbumin and biotinylated bovine serum albumin but not …

Resistance Of Blastocystis Hominis Cysts To Chlorine, M Zaki, V Zaman, N A. Sheikh

Department of Pathology and Laboratory Medicine

No abstract provided.

Human Immunodeficiency Virus (Hiv)/Hepatitis B Virus (Hbv) Risk Perception Related To Needlestick Injuries At A Medical School In Norfolk, Virginia, Ronald B. Hartman

Community & Environmental Health Theses & Dissertations

A limited number of studies have been conducted to assess the perceptions of risk of medical students and residents for acquiring Human Immunodeficiency Virus (HIV) or Hepatitis B Virus (HBV) via percutaneous (needlestick) injuries while performing clinical training. The purpose of this study is to investigate these perceptions of risk, and to determine whether there is an association between a high perception of risk and a low incidence of needlestick injury. The method of investigation was a four-page survey questionnaire. The instrument was investigated for reliability by use of a pilot study with a small group of medical students and …

Wind Protection And Planting Date Affect Snapbean Growth And Yield [Abstract], Mohammed Nazip Suratman, Laurie Hodges, James R. Brandle, Kenneth G. Hubbard

Department of Agronomy and Horticulture: Faculty Publications

The effects of windbreak shelter on growth, total, and marketable yield of snapbeans were evaluated during 1994 and 1995.

Impact Of Pesticide Residues In Composted Lawn Waste Compost On Vegetable Crops [Abstract], Cindy Stuefer-Powell, Patrick J. Shea, Laurie Hodges, Garald L. Horst

Department of Agronomy and Horticulture: Faculty Publications

To conserve space in the Lincoln (Nebraska) city landfill, a program for composting urban yard waste was initiated in 1992.

Effects Of Fatiguing Stimulation On Intracellular Na+ And K+ In Frog Skeletal Muscle, Edward Michael Balog, Robert H. Fitts

Biological Sciences Faculty Research and Publications

The purpose of this study was to describe the alterations in the intracellular concentrations of sodium ([Na⁺]_i) and potassium ([K⁺]_i) and the membrane potential (E_m) as a result of fatiguing stimulation of the frog semitendinosus muscle and to relate these changes to the alterations in the sarcolemma action potential and force-generating ability of the muscle. [Na⁺]_i and [K⁺]_i were measured by using ion-selective microelectrodes. Before stimulation (100-ms trains at 150 Hz, 1 stimulus/s for 5 min), [Na⁺]_i, [K⁺] …

The Effects Of Zinc On Skeletal Alkaline Phosphatase Activity And Skeletal Tissues, Susan L. Hall

Loma Linda University Electronic Theses, Dissertations & Projects

Zinc is essential for normal growth, however, very little is known about the mechanisms by which zinc influences growth. ALP, an ectoenzyme expressed in high levels in osteoblasts, is a zinc-containing metalloenzyme and is important in bone formation. Preliminary studies showed that low levels of zinc could increase ALP specific activity in human osteosarcoma, SaOS-2 cells. Current studies were designed to characterize this zinc effect, test possible mechanisms, and determine whether the effect is physiologically relevant. Incubation with zinc resulted in a time and dose dependent increase in ALP specific activity in the extracts and conditioned media of SaOS-2 cells, …

Molecular Studies Of Restriction Genes In Enteric Bacteria, Obed B. Rutebuka

Loma Linda University Electronic Theses, Dissertations & Projects

Bacterial cells contain various restriction-modification (R-M) systems to protect themselves from incoming foreign DNA. Most bacteria have at least one such system. In this study, the restriction genes and the location of the genes on the chromosome were examined in three enteric bacteria. Salmonella typhimurium LT2, Klebsiella pneumoniae GM 236, and Klebsiella pneumoniae M5al. The 98 minute region of the Salmonella typhimurium LT2 chromosome comprises at least two R-M systems. From genetic data this region was previously thought to be only one minute in length but was found to be larger than two minutes using a physical mapping technique, pulsed …

Pre-Embedding Staining Of Single Muscle Fibers For Light And Electron Microscopy Studies Of Subcellular Organization, Evelyn Ralston, Thorkil Ploug

Scanning Microscopy

Skeletal muscle fibers are large, multinucleated cells which pose a challenge to the morphologist. In the course of studies of the distribution of the glucose transporter GLUT4, in muscle, we have compared different preparative procedures, for both light (LM) and electron microscopy (EM) immunocytochemistry. Here we show that pre-embedding staining of single teased fibers, or of single enzymatically dissociated fibers, has several advantages over the use of sections for observing discrete patterns that extend over long distances in the cells. We report on an optimization study carried out to establish fixation and permeabilization conditions for EM immunogold labeling of the …

Prediction Of Breeding Values For Tenderness Of Market Animals From Measurements On Bulls, K. L. Barkhouse, L. Dale Van Vleck, Larry V. Cundiff, M. Koohamaraie, D. D. Lunstra, J. D. Crouse

Department of Animal Science: Faculty Publications

Data were tenderness measures on steaks from 237 bulls (Group II) slaughtered after producing freezable semen and on 1,431 related steers and heifers (market animals, Group I ) from Angus, Hereford, Pinzgauer, Brahman, and Sahiwal crosses from the Germ Plasm Evaluation project at the U.S. Meat Animal Research Center. Tenderness was assessed through Warner-Bratzler Shear Force (SF), taste panel tenderness (TPT), marbling score (MS), and myofibrillar fragmentation index (MFI). For all traits, as fraction Bos indicus inheritance increased, implied tenderness decreased. Heritability estimates were generally not significantly different from zero. Genetic correlations generally indicated favorable associations among the traits. The …

Structural And Calcification Patterns Of The Neonatal Line In The Enamel Of Human Deciduous Teeth, Tetsuo Kodaka, Tsuneyoshi Sano, Shohei Higashi

Scanning Microscopy

The neonatal line of the enamel in human deciduous teeth was observed by scanning electron microscopy using secondary and backscattered electron signals. The neonatal line containing irregular structures of enamel prisms with disordered crystal arrangements was basically formed by the abrupt bending of the prisms towards the root. Usually, the prisms gradually bent back again to regain their previous orientation, but the prisms in the inner and the surface layer sometimes ran straight ahead after bending. The prism sheath regions showing hypocalcification contained a relatively large amount of organic material as shown by treatment with chromium sulfate. When etched with …

Monte Carlo Simulation Of Secondary Electron Emission From Thin Film/Substrate Targets, K. Murata, M. Yasuda, H. Kawata

Scanning Microscopy

We have developed a Monte Carlo simulation model of secondary electron emission from thin film/substrate samples, taking into consideration their exact boundary condition. First, the validity of the model is checked in comparison with the experimental data reported such as the secondary electron emission and backscattering yields from thick Al, thick Au targets and Al thin films on a Au substrate, the energy distribution of secondary electrons, and the contribution of backscattering to the secondary electron emission yield. The agreement is relatively good. Next, we have applied the model to the secondary electron emission from Au films on an Al …

Cropwatch No. 96-17, July 26, 1996, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Crop/pest update ................. 122

Evapotranspiration................. 122

AgrAbility potential ................. 123

Tillage effects on yield................. 124

Interactive Effects Of Inducible Defense And Resource Availability On Phlorotannins In The North Atlantic Brown Alga Fucus Vesiculosus, P. Peckol, J. M. Krane, J. L. Yates

Biological Sciences: Faculty Publications

Research seeking to explain the ecological role of polyphenolics (phlorotannins) in plants and brown algae has largely focused on 2 alternative concepts, the carbon/nutrient (C/N) balance and the inducible defense models. We tested the hierarchy of effects of both models on phlorotannin production in the brown alga Fucus vesiculosus (Fucales) by simultaneously manipulating the N environment and simulating herbivory for 2 oceanic (high and low intertidal) and estuarine populations. We measured phlorotannin levels in algae under control, grazed, N-enriched, and grazed + N-enriched treatments with time (0 to 14 d) throughout the year to determine onset and duration of the …

Acer Glabrum Var. Torreyi (Greene) Smiley, Barbara Ertter

Specimens by Name

No abstract provided.

Comparison Of Circulating Concentrations Of Reproductive Hormones In Boars Of Lines Selected For Size Of Testes Or Number Of Ovulations And Embryonal Survival To Concentrations In Respective Control Lines, D. V. Mariscal, P. L. Wolfe, E. G. M. Bergfeld, Andrea S. Cupp, F. N. Kojima, K. E. Fike, T. Sanchez, M. E. Wehrman, Rodger K. Johnson, Roger J. Kittok, J. J. Ford, J. E. Kinder

Department of Animal Science: Faculty Publications

The objectives of this study were to determine whether circulating concentrations of gonadotropins and gonadal hormones of boars were altered as a result of selection of pigs for size of testes or for embryonal survival and(or) number of ovulations. Included in Exp. 1 and 2 were boars with the greatest estimated paired weight of testes (TS) and boars from a control (C) line. Concentrations of FSH were similar ( P > .10) in boars from the TS and C lines. In Exp. 3, 4, and 5, circulating concentrations of FSH and 17β-estradiol (E₂) were evaluated in neonates, during pubertal …

Cropwatch No. 96-16, July 19, 1996, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

New publications ...................... 116

Rootworm resistance...................... 117

Evapotranspiration data ...................... 118

Western bean cutworm ...................... 119

Nutrients in manure...................... 120

Effects Of Thermal Processing On The Stability Of Fumonisin B2 In An Aqueous System, Lauren S. Jackson, Jason J. Hlywka, Kannaki R. Senthil, Lloyd B. Bullerman

Department of Food Science and Technology: Faculty Publications

Fusarium moniliforme, a prevalent fungal contaminant of corn, has been implicated in several animal diseases including equine leukoencephalomalacia (ELEM) (Thiel et al., 1991), porcine pulmonary edema (PPE) (Harrison et al., 1990), liver toxicity and liver cancer in rats (Voss et al., 1993), and esophageal cancer in humans (Sydenham et al., 1991; Rheeder et al., 1992). The fumonisins, which are secondary metabolites of F. moniliforme, are believed to be responsible for many of the toxicological effects in animals and humans (Marasas et al., 1988; Wilson et al., 1992; Colvin et al., 1993, Gelderblom et al., 1991; Sydenham et al., …

Minutes And Recommendations Of The H. O. Sargent Task Force, Future Farmers Of America

Documents

Minutes and Recommendations of the H. O. Sargent Task Force, concerning the NFA's place in the FFA history book.

Cropwatch No. 96-15, July 12, 1996, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Crop/pest update....................108

Assessing corn damage....................109

Assessing soybean damage....................110

Weeds in wheat postharvest....................111

Spider mites in corn....................112

Wheat seed outlook....................114

Wipers and bean bars....................114

Parthenocissus Quinquefolia (L.) Planch., John E. Ebinger

Specimens by Name

No abstract provided.

Avicennia Germinans (L.) Stearn, John E. Ebinger

Specimens by Name

No abstract provided.

Verbena Bracteata Lag. & Rodr., Gordon C. Tucker

Specimens by Name

No abstract provided.