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Reduction Of Chromium(Vi) By Locally Isolated Pseudomonas Sp. C-171, Mujeeb Ur Rahman, Shereen Gul, Mohammad Zahoor Ul Haq Jan 2007

Reduction Of Chromium(Vi) By Locally Isolated Pseudomonas Sp. C-171, Mujeeb Ur Rahman, Shereen Gul, Mohammad Zahoor Ul Haq

Turkish Journal of Biology

A strain of Pseudomonas sp. C-171 capable of tolerating hexavalent chromium (Cr^{+6}) up to 2000 ppm as potassium dichromate was isolated from domestic sewage. The Cr^{+6} reduction was checked by growing the isolated strain in a medium containing potassium dichromate as Cr^{+6} source. The rate of growth of Pseudomonas sp. C-171 decreased with the increase in Cr^{+6} concentration of the medium. The maximum rate of chromium reduction was observed during the log phase of bacterium growth. The reduction of hexavalent chromium was inoculum concentration dependent. The accumulation of chromium hydroxide around the bacterial cells and slight elongation of cells were …

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Antibacterial, Antifungal And Cytotoxic Activities Of Tuberous Roots Of Amorphophallus Campanulatus, Alam Khan, Moizur Rahman, Shariful Islam Jan 2007

Antibacterial, Antifungal And Cytotoxic Activities Of Tuberous Roots Of Amorphophallus Campanulatus, Alam Khan, Moizur Rahman, Shariful Islam

Turkish Journal of Biology

Antibacterial, antifungal and cytotoxic activities of ethanol extract of tuberous roots of Amorphophallus campanulatus were studied. Disc diffusion technique was used to determine in vitro antibacterial and antifungal activities. Cytotoxicity was determined against brine shrimp nauplii. In addition, minimum inhibitory concentration (MIC) was determined using serial dilution technique to determine antibacterial potency. The extract showed significant antibacterial activities against four gram-positive bacteria (Bacillus subtilis, Bacillus megaterium, Staphylococcus aureus, Streptococcus b-haemolyticus) and six gram-negative bacteria (Escherichia coli, Shigella dysenteriae, Shigella sonnei, Shigella flexneri, Pseudomonas aeruginosa, Salmonella typhi). The MIC values against these bacteria ranged from 16 to 128 µg/ml. The antifungal …

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Genetic Identification Of Diploid And Tetraploid Wheat Species With Rapd Markers, Rami̇z Tagi̇ Ali̇yev, Mehraj Ali̇ Abbasov, Alamdar Charkaz Mammadov Jan 2007

Genetic Identification Of Diploid And Tetraploid Wheat Species With Rapd Markers, Rami̇z Tagi̇ Ali̇yev, Mehraj Ali̇ Abbasov, Alamdar Charkaz Mammadov

Turkish Journal of Biology

The genetic diversity of 10 diploid and tetraploid wheat species was estimated using random amplified polymorphic DNA (RAPD) markers. Two species from diploid [Triticum boeticum (wild), Triticum monococcum] and five from tetraploid wheats [Triticum dicoccoides var. arabicum (wild), Triticum dicoccum var. farrum, Triticum dicoccum var. atratum, Triticum durum var. hordeiforme (Bereketli 95), Triticum durum var. leucurum (Sharq), Triticum turgidum var. alboyadurum, Triticum turgidum var. salomonis and Triticum persicum] were included for the analyses. Jacard's cluster analysis algorithm was used to determine genetic similarities. There were two main classes in dendrogram: the varieties [T. boeticum, T. dicoccoides var. arabicum, T. dicoccum …

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The Abundance Of Arbuscular Mycorrhizal Fungi Spores In Rhizospheres Of Different Crops, Ali Akbar Safari Sinegani, Zahed Sharifi Jan 2007

The Abundance Of Arbuscular Mycorrhizal Fungi Spores In Rhizospheres Of Different Crops, Ali Akbar Safari Sinegani, Zahed Sharifi

Turkish Journal of Biology

The number of spores of vesicular-arbuscular mycorrhizal (VAM) fungi occurring in the rhizospheric soil of 14 crops was investigated using traditional wet-sieving/decanting methods. The aim of the study was to determine the effect of some agronomy species (Gramineae, Leguminosae, Solanaceae, Labiatae, Cruciferae, Umbellifera, and Alliaceae) on VAM spores numbers in the rhizosphere. The agronomy species were planted under greenhouse conditions in pots containing semiarid soil. The number of spores in the rhizosphere of each species was studied at the middle and end of vegetative plant growth. In the middle of vegetative growth the number of spores increased significantly in the …

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Ems Induced Karyomorphological Variations In Maize (Zea Mays L.) Inbreds, Girjesh Kumar, Prashant Kumar Rai Jan 2007

Ems Induced Karyomorphological Variations In Maize (Zea Mays L.) Inbreds, Girjesh Kumar, Prashant Kumar Rai

Turkish Journal of Biology

Chemical mutagen induced chromosomal variations were broadly observed from the point of view of understanding the mechanics of EMS induced anomalies and biological dosimetry in Zea mays L. Seeds of 6 inbred lines of maize, i.e. CM-135, CM-136, CM-137, CM-138, CM-142, and CM-213 inbreds, were first presoaked in distilled water and then these seeds were treated with 0.5% solution of EMS for 3 durations, i.e. 3, 5, and 7 h, and genetic segregations were carefully observed. During the present investigation, through EMS treatment, many chromosomal anomalies, namely precocious movements, stickiness, univalents, bridges, laggards, multivalents etc., were induced in all the …

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Use Of Avicennia Marina (Forsk.) Vierh In The Control Of Root Knot Nematode Meloidogyne Javanica (Treub) Chitwood On Okra And Mash Bean, Marium Tariq, Shahnaz Dawar, Fatima S. Mehdi, Muhammad Javed Zaki Jan 2007

Use Of Avicennia Marina (Forsk.) Vierh In The Control Of Root Knot Nematode Meloidogyne Javanica (Treub) Chitwood On Okra And Mash Bean, Marium Tariq, Shahnaz Dawar, Fatima S. Mehdi, Muhammad Javed Zaki

Turkish Journal of Biology

Aqueous and ethanol extracts of Avicennia marina (Forsk.) Vierh. plant parts, namely leaves, stem and pneumatophore, were tested for their nematicidal activity against root knot nematode Meloidogyne javanica (Treub) Chitwood. Results showed that A. marina exerted more lethal effect in mortality of juveniles compared to hatching of juveniles. Stem showed more nematicidal effect compared to leaves and pneumatophore in aqueous extract, whereas pneumatophore showed more nematicidal activity in ethanol extract. Soil amendment at the rates of 0.1, 1 and 5% w/w was carried out with dried powder of leaves, stem and pneumatophore of A. marina for the control of root …

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Antibacterial Activities Of Some Medicinal Plants Of The Western Region Of India, Rathish Nair, Sumitra Chanda Jan 2007

Antibacterial Activities Of Some Medicinal Plants Of The Western Region Of India, Rathish Nair, Sumitra Chanda

Turkish Journal of Biology

Ten medicinal plants, namely Commiphora wightii, Hibiscus cannabinus, Anethum gravelons, Emblica officinalis, Ficus religiosa, Ficus racemosa, Ficus benghalensis, Ficus tisela, Mentha arvensis and Mimusops elengi, were screened for potential antibacterial activity against medically important bacterial strains, namely Pseudomonas aeruginosa, Proteus mirabilis, Staphylococcus aureus, Bacillus cereus, Alcaligenes faecalis and Salmonella typhimurium. The antibacterial activity was determined in aqueous and ethanol extracts using both agar disc diffusion and agar well diffusion methods. The ethanol extracts were more potent than aqueous extracts of all the plants studied. Pseudomonas aeruginosa and Salmonella typhimurium were the most resistant strains while the most susceptible bacterial strains …

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In Vitro Study Of Ethanolic Extract Of Hypericum Perforatum L. On Growth And Sporulation Of Some Bacteria And Fungi, Tanja Milosevic, Slavica Solujic-Sukdolak, Slobodan Sukdolak Jan 2007

In Vitro Study Of Ethanolic Extract Of Hypericum Perforatum L. On Growth And Sporulation Of Some Bacteria And Fungi, Tanja Milosevic, Slavica Solujic-Sukdolak, Slobodan Sukdolak

Turkish Journal of Biology

The antibacterial activity of an ethanolic extract of Hypericum perforatum L. was investigated against 8 Gram-negative bacteria (Pseudomonas fluorescens, Pseudomonas phaseolicola, Pseudomonas glycinea, Erwinia carotovora, Enterobacter cloacae, Klebsiella pneumoniae, Agrobacterium tumefaciens, Azotobacter chrococcum) and 2 Gram-positive bacteria (Bacillus mycoides, Bacillus subtilis) by the disc-diffusion and broth tube dilution methods. Ethanol was used for extraction of the plant. The species Pseudomonas glycinea and Azotobacter chrococcum showed extreme sensitivity to the extract of H. perforatum, while no effect was observed on bacteria Klebsiella pneumoniae. Minimum inhibitory concentration (MIC) of the ethanolic extract varied between 1.25 and 3.5 mg/ml. The antifungal activity of …

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Screening Of Methanol And Acetone Extracts Of Fourteen Indian Medicinal Plants For Antimicrobial Activity, Yogeshkumar Vaghasiya, Sumitra Chanda Jan 2007

Screening Of Methanol And Acetone Extracts Of Fourteen Indian Medicinal Plants For Antimicrobial Activity, Yogeshkumar Vaghasiya, Sumitra Chanda

Turkish Journal of Biology

The methanol and acetone extracts of 14 plants belonging to different families were evaluated for antimicrobial activity against five Gram-positive bacteria: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus cereus, Bacillus subtilis, Micrococcus flavus; seven Gram-negative bacteria: Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Proteus vulgaris, Salmonella typhimurium, Citrobacter freundii; and three fungi: Candida tropicalis, Cryptococcus luteolus and Candida albicans. The in vitro antimicrobial activity was performed by agar disc diffusion method. The extractive yield was more in methanol than in acetone. The methanol extracts showed more antibacterial activity than acetone extracts. The most susceptible bacterium was K. pneumoniae and the most …

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The Origin Of 2 Sexes Through Optimization Of Recombination Entropy Against Time And Energy, Bo Deng Jan 2007

The Origin Of 2 Sexes Through Optimization Of Recombination Entropy Against Time And Energy, Bo Deng

Department of Mathematics: Faculty Publications

Sexual reproduction in nature requires two sexes, which raises the question why the reproductive scheme did not evolve to have three or more sexes. Here we construct a constrained optimization model based on the communication theory to analyze trade-offs among reproductive schemes with arbitrary number of sexes. More sexes on one hand lead to higher reproductive diversity, but on the other hand incur greater cost in time and energy for reproductive success. Our model shows that the two-sexes reproduction scheme maximizes the recombination entropy-to-cost ratio, and hence is the optimal solution to the problem.

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Antimicrobial Activities Of Aldehydes And Ketones Produced During Rapid Volatilization Of Biogenic Oils, Aruna Lamba Jan 2007

Antimicrobial Activities Of Aldehydes And Ketones Produced During Rapid Volatilization Of Biogenic Oils, Aruna Lamba

Masters Theses

"The overall objective of the research presented in this thesis was to evaluate the antimicrobial properties of commercially available neat compounds in order to validate the analytes which were found in the smoke generated during rapid volatilization of biogenic oil esters and mineral oils. To attain this objective various analytes were selected from the analytical data provided for the smoke, and neat compounds were purchased. A special desiccator was designed to conduct experiments. Simultaneously vapor phase concentration of the neat compounds was determined to establish relation between neat compounds and the analytes found in smoke. Other part of the thesis …

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In Vivo Effects Of Bisphenol A In Laboratory Rodent Studies, Catherine A. Richter, Linda S. Birnbaum, Francesca Farabollini, Retha R. Newbold, Beverly S. Rubin, Chris E. Talsness, John G. Vandenbergh, Debby R. Walser-Kuntz, Frederick S. Vom Saal Jan 2007

In Vivo Effects Of Bisphenol A In Laboratory Rodent Studies, Catherine A. Richter, Linda S. Birnbaum, Francesca Farabollini, Retha R. Newbold, Beverly S. Rubin, Chris E. Talsness, John G. Vandenbergh, Debby R. Walser-Kuntz, Frederick S. Vom Saal

Biology Faculty Work

Concern is mounting regarding the human health and environmental effects of bisphenol A (BPA), a high-production-volume chemical used in synthesis of plastics. We have reviewed the growing literature on effects of low doses of BPA, below 50 mg/kg/day, in laboratory exposures with mammalian model organisms. Many, but not all, effects of BPA are similar to effects seen in response to the model estrogens diethylstilbestrol and ethinylestradiol. For most effects, the potency of BPA is approximately 10 to 1,000-fold less than that of diethylstilbestrol or ethinylestradiol. Based on our review of the literature, a consensus was reached regarding our level of …

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The Bro1-Domain Protein, Ego-2, Promotes Notch Signaling In Caenorhabditis Elegans, Ying Liu, Eleanor M. Maine Jan 2007

The Bro1-Domain Protein, Ego-2, Promotes Notch Signaling In Caenorhabditis Elegans, Ying Liu, Eleanor M. Maine

Biology - All Scholarship

In Caenorhabditis elegans, as in other animals, Notch-type signaling mediates numerous inductive events during development. The mechanism of Notch-type signaling involves proteolytic cleavage of the receptor and subsequent transport of the receptor intracellular domain to the nucleus, where it acts as a transcriptional regulator. Notch-type signaling activity is modulated by post-translational modifications and endocytosis of ligand and receptor. We previously identified the ego-2 (enhancer of glp-1) gene as a positive regulator of germline proliferation that interacts genetically with the GLP-1/Notch signaling pathway in the germline. Here, we show that ego-2 positively regulates signaling in various tissues via both GLP-1 and …

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The Effect Of 1,25-Dihydroxy Vitamin D3 On At1 Cell Receptor Expression In Human Iliac Artery Endothelial Cells (Hiaec), Jenny Thomas Jan 2007

The Effect Of 1,25-Dihydroxy Vitamin D3 On At1 Cell Receptor Expression In Human Iliac Artery Endothelial Cells (Hiaec), Jenny Thomas

Theses and Dissertations

The renin-angiotensin system (RAS) plays an important part in homeostasis through angiotensin IPs role as a vasoconstrictor. Defects in the renin angiotensin system can lead to hypertension, heart attack, and stroke (Weir, 1999). Studies have shown an inverse relationship between Vitamin D3 and blood pressure (Li et al., 2002). While studies have been performed on vitamin D's effect on renin expression, little is known about vitamin D's effect on the angiotensin II high-affinity type 1 (ATi) receptor. The hypothesis for this study was that human iliac artery endothelial cells (HIAEC) supplemented with 1,25-dihydroxy vitamin D3 will express less AT] receptor …

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A Scent-Station Survey Of Medium-Size Mammals On The Callaway Preserve, Harris County, Georgia, Anna-Maria Giacobello Jan 2007

A Scent-Station Survey Of Medium-Size Mammals On The Callaway Preserve, Harris County, Georgia, Anna-Maria Giacobello

Theses and Dissertations

The objective of this project was to determine the relative abundance of medium- sized mammals on the Callaway Preserve in Harris County, Georgia, using the scent- station technique, to determine species preference in regard to habitat, to compare relative abundance of species in regard to habitat, and to compare habitats in terms of the species present. Thirty-six scent-stations were established on the property and monitored to observe the presence of coyotes, raccoons, armadillos, foxes, opossums, and skunks. Of the total number of visits to the scent-stations, 36.36 % were coyotes, 18.18% were foxes 22.73% were armadillos, and 22.73% were raccoons. …

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Process Development For The Formation Of Post-Bonding Biorecognition Layers In Microfluidic Biosensors, Martin G. Perez, Phaninder R. Kanikella, James N. Reck, Chang-Soo Kim, Matthew O'Keefe Jan 2007

Process Development For The Formation Of Post-Bonding Biorecognition Layers In Microfluidic Biosensors, Martin G. Perez, Phaninder R. Kanikella, James N. Reck, Chang-Soo Kim, Matthew O'Keefe

Electrical and Computer Engineering Faculty Research & Creative Works

Formation of the biorecognition layers within microfluidic sensor channels must be done after the completion of the channel structure since these layers cannot withstand the wafer bonding temperature. We propose a new post-bonding immobilization process to prepare the enzyme layers within microfluidic channels of electrochemical biosensors. An array of Pt vertical electrodes is electroplated using a SU-8 mold. The cured SU-8 is then removed by plasma etching to expose the Pt electrode and to define the fluidic channel cavity simultaneously. An array of enzyme posts is formed on the Pt surface by either electropolymerizing or photopolymerizing enzyme precursor solutions injected …

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Bacterial Toxins And Bioterrorism, Nehama Prus Jan 2007

Bacterial Toxins And Bioterrorism, Nehama Prus

The Science Journal of the Lander College of Arts and Sciences

Bacterial toxins are some of the most potent substances known to man. Bacterial toxins are microbial poisons that profoundly affect the establishment and course of disease, because a single toxin can greatly increase the virulence of an organism (Alcamo, 1994). Organisms have the ability to attach to and colonize mucosal surfaces in the body, eventually invading deeper tissues. However, their ability to cause human disease is often determined by their ability to form and excrete microbial toxins (Murray, 1994). Many emerging and reemerging bacterial pathogens synthesize toxins that serve as primary virulence factors (Schmitt et al, 1999).

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Acetaminophen Toxicity To The Liver, Sara Miriam Flaum Jan 2007

Acetaminophen Toxicity To The Liver, Sara Miriam Flaum

The Science Journal of the Lander College of Arts and Sciences

Acetaminophen is a drug commonly used in America. Acetaminophen is an excellent antipyretic and has good analgesic effects, especially for a nonprescription drug. However, unlike other nonprescription drugs in this category, it can have significant liver toxicity. This paper discusses the potential for liver toxicity, and presents information on how acetaminophen affects specific proteins in the liver (P450). For example, not only can it inhibit drug metabolism via acting as an alternative (competitive) substrate for proteins that are responsible for drug metabolism, it can also paradoxically increase drug metabolism by increasing these proteins (induction of P450). The literature reviewed and …

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Full Issue: Volume 1, Number 1, Spring 2007 Jan 2007

Full Issue: Volume 1, Number 1, Spring 2007

The Science Journal of the Lander College of Arts and Sciences

No abstract provided.

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Spatial And Temporal Patterns Of Anadromous Fish Passage At Boshers Dam Vertical Slot Fishway On The James River, Richmond, Virginia, Matthew Thomas Fisher Jan 2007

Spatial And Temporal Patterns Of Anadromous Fish Passage At Boshers Dam Vertical Slot Fishway On The James River, Richmond, Virginia, Matthew Thomas Fisher

Theses and Dissertations

Boshers dam vertical slot fishway, James River, Virginia, U.S.A., opened in 1999 and restored connectivity to 543.3 km of spawning habitat for anadromous fish. The fishway also allowed local movement of resident species. Video observation from 2001-2005 was used to evaluate environmental predictors of American shad (Alosa sapidissima) and sea lamprey (Petromyzon marinus) passage. The ecological effects of restoring connectivity to upstream habitat for gizzard shad (Dorosoma cepedianum) and blue catfish (Ictalurus furcatus) are also discussed. Regression analysis determined that the best predictor of increased daytime American shad passage is higher water temperatures and discharge and for increased daytime sea …

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Response Of Eelgrass Zostera Marina To Co2 Enrichment: Possible Impacts Of Climate Change And Potential For Remediation Of Coastal Habitats, Sherry L. Palacios, Richard C. Zimmerman Jan 2007

Response Of Eelgrass Zostera Marina To Co2 Enrichment: Possible Impacts Of Climate Change And Potential For Remediation Of Coastal Habitats, Sherry L. Palacios, Richard C. Zimmerman

OES Faculty Publications

Projected increases in dissolved aqueous concentrations of carbon dioxide [CO2(aq)] may have significant impacts on photosynthesis Of CO2-limited organisms such as seagrasses. Short-term CO2(aq) enrichment increases photosynthetic rates and reduces light requirements for growth and survival of individual eelgrass Zostera marina L. shoots growing in the laboratory under artificial light regimes for at least 45 d. This study examined the effects of long-term CO2(aq) enrichment on the performance of eelgrass growing under natural light-replete (33% surface irradiance) and light-limited (5% surface irradiance) conditions for a period of 1 yr. Eelgrass shoots were grown at …

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A Study Of The Interaction Between The Basigin Transmembrane Domain And Monocarboxylate Transporter 1, Nicole A. Finch Jan 2007

A Study Of The Interaction Between The Basigin Transmembrane Domain And Monocarboxylate Transporter 1, Nicole A. Finch

UNF Graduate Theses and Dissertations

It is thought that a lactate shuttle complex of Basigin gene products and Monocarboxylate transporter 1 (MCT1) is necessary for photoreceptor cell maturation and function. The purpose of this study was to investigate the assembly of the lactate shuttle by determining which amino acids within Basigin interact with MCT1. It has been hypothesized that these two membrane proteins interact via the transmembrane domain of Basigin. Therefore, a full-length histidine-tagged peptide of the transmembrane domain (24 amino acids), as well as histidine-tagged deletion mutants were generated using the pET1 02/0 vector (Invitrogen) to test for binding to MCT1 via enzyme-linked immunosorbent …

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Germ-Line Chimerism And Paternal Care In Marmosets (Callithrix Kuhlii), Corinna N. Ross, J. A. French, G. Ortí Jan 2007

Germ-Line Chimerism And Paternal Care In Marmosets (Callithrix Kuhlii), Corinna N. Ross, J. A. French, G. Ortí

Biology Faculty Publications (Archived)

The formation of viable genetic chimeras in mammals through the transfer of cells between siblings in utero is rare. Using microsatellite DNA markers, we show here that chimerism in marmoset (Callithrix kuhlii) twins is not limited to blood-derived hematopoietic tissues as was previously described. All somatic tissue types sampled were found to be chimeric. Notably, chimerism was demonstrated to be present in germ-line tissues, an event never before documented as naturally occurring in a primate. In fact, we found that chimeric marmosets often transmit sibling alleles acquired in utero to their own offspring. Thus, an individual that contributes gametes to …

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Conditions For Caribou Persistence In The Wolf-Elk-Caribou Systems Of The Canadian Rockies, Mark Hebblewhite, Jesse Whittington, Mark Bradley, Geoff Skinner, Alan Dibb, Clifford A. White Jan 2007

Conditions For Caribou Persistence In The Wolf-Elk-Caribou Systems Of The Canadian Rockies, Mark Hebblewhite, Jesse Whittington, Mark Bradley, Geoff Skinner, Alan Dibb, Clifford A. White

Biological Sciences Faculty Publications

Woodland caribou populations are considered threatened in Alberta and have declined in the Canadian Rocky Mountain National Parks of Banff and Jasper despite protection from factors causing caribou populations to decline outside of parks. Recent research emphasizes the importance of the numeric response of wolves to moose in moose-caribou-wolf systems to caribou persistence. Moose are rare in the Canadian Rockies, where the dominant ungulate prey for wolves is elk. Few studies have explored wolf-elk dynamics and none have examined implications for caribou. We used data collected in Banff to estimate the numeric response of wolves to elk from 1985 to …

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Trophic Status Of A Small Mammal Assemblage On Cape Canaveral Air Force Station With An Emphasis On Peromyscus Polionotus Niveiv, Megan Keserauskis Jan 2007

Trophic Status Of A Small Mammal Assemblage On Cape Canaveral Air Force Station With An Emphasis On Peromyscus Polionotus Niveiv, Megan Keserauskis

Electronic Theses and Dissertations

Successful translocation of a listed species into an area of previous occupation requires knowledge of the habitat needs. The presence of the necessary food items is critical to the successful establishment of a new population; this information is unknown for Peromyscus polionotus niveiventris, the southeastern beach mouse, a threatened subspecies on the east coast of Florida. I used fecal and stable isotope analysis to determine the diet of this subspecies at Cape Canaveral Air Force Station, Brevard County, Florida, between the autumn of 2003 and the spring of 2005. Six trapping grids were established, three in the dune/swale and three …

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Tissue And Life Stage Distribution Of A Defensin-Like Gene In The Lone Star Tick Amblyomma Americanum, S. Michelle Todd, Daniel E. Sonenshine, Wayne L. Hynes Jan 2007

Tissue And Life Stage Distribution Of A Defensin-Like Gene In The Lone Star Tick Amblyomma Americanum, S. Michelle Todd, Daniel E. Sonenshine, Wayne L. Hynes

Biological Sciences Faculty Publications

The transcript sequence of the Amblyomma americanum Linnaeus (Acari: Ixodidae) defensin, termed amercin (amn), was ascertained and a 219-bp amn coding region identified. The gene encodes a 72-amino acid prepropeptide with a putative 37-amino acid mature peptide. This gene shows little similarity to either of the defensins from Amblyomma hebraeum Koch, the only other Amblyomma species for which a defensin has been described. Sequence comparisons with other tick defensins reveal amn to be shorter (6 bp or 2 amino acids) than the Ixodes scapularis Linnaeus (Acari: Ixodidae) and Dermacentor variabilis (Say) (Acari: Ixodidae) defensin sequences. The amercin prepropeptide …

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In Vivo Imaging Of Transport And Biocompatibility Of Single Silver Nanoparticles In Early Development Of Zebrafish Embryos, Kerry J. Lee, Prakash D. Nallathamby, Lauren M. Browning, Christopher J. Osgood, Xiao-Hong Nancy Xu Jan 2007

In Vivo Imaging Of Transport And Biocompatibility Of Single Silver Nanoparticles In Early Development Of Zebrafish Embryos, Kerry J. Lee, Prakash D. Nallathamby, Lauren M. Browning, Christopher J. Osgood, Xiao-Hong Nancy Xu

Chemistry & Biochemistry Faculty Publications

Real-time study of the transport and biocompatibility of nanomaterials in early embryonic development at single-nanoparticle resolution can offer new knowledge about the delivery and effects of nanomaterials in vivo, and provide new insights into molecular transport mechanisms in developing embryos. In this study, we directly characterized the transport of single silver nanoparticles into an in vivo model system (zebrafish embryos) and investigated their effects on early embryonic development at single-nanoparticle resolution in real time. We designed highly purified and stable (not aggregated and no photodecomposition) nanoparticles and developed single-nanoparticle optics and in vivo assays to enable the study. We …

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Sex-Biased Parasitism And The Reproductive Costs Of Parasites In A Social African Ground Squirrel, Melissa Ann Hillegass Jan 2007

Sex-Biased Parasitism And The Reproductive Costs Of Parasites In A Social African Ground Squirrel, Melissa Ann Hillegass

Electronic Theses and Dissertations

Vertebrate males frequently carry higher numbers of parasites than females. This bias in parasite loads could be a consequence of sexual selection. Grouping species are also assumed to be afflicted with larger numbers of parasites than solitary animals and associated costs of this parasitism could vary with group size or structure. I examined sex-biased parasitism and the influence of group size on parasite loads in Cape ground squirrels (Xerus inauris), a highly social species that occurs in the arid regions of southern Africa. Males carried three times as many ectoparasites as females, but females harbored nearly three times more endoparasites …

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Does Habitat Affect Clonal Demography? An Experiment With Polygonella Myriophylla In Roadside And Florida Scrub, Kristina Dianne Horn Jan 2007

Does Habitat Affect Clonal Demography? An Experiment With Polygonella Myriophylla In Roadside And Florida Scrub, Kristina Dianne Horn

Electronic Theses and Dissertations

Polygonella myriophylla (Polygonaceae) is a clonal shrub listed as endangered and narrowly endemic to pyrogenic scrub ecosystems in central Florida. It is almost restricted to gaps within the matrix of shrubs in the scrub but also occurs along adjacent road-side habitats. I hypothesize that persistent disturbed microhabitats and more dynamic sand accretion in roadsides will increase rooting probabilities compared to more stable scrub habitats, affecting survival, growth and reproduction. In April 2004- March 2006, I compared plant (genet) and basal branch (ramet) performance between experimentally manipulated plants in native scrub and roadside habitats at two locations within the Lake Wales …

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Avian Motoneuron Apoptosis Following Protease Activated Receptor -1 Activation Is Triggered Neither Through Increased Free Intracellular Calcium Levels Nor Decreased Neurotrophic, David Bumpass, Victoria L. Turgeon, Ph.D Jan 2007

Avian Motoneuron Apoptosis Following Protease Activated Receptor -1 Activation Is Triggered Neither Through Increased Free Intracellular Calcium Levels Nor Decreased Neurotrophic, David Bumpass, Victoria L. Turgeon, Ph.D

Journal of the South Carolina Academy of Science

No abstract provided.

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