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Full-Text Articles in Biology
Osteology, Morphology, And Female Choice In Species Of The Genus Cynolebias (Cyprinodontiformes: Rivulidae), Marcelo Loureiro Barrella
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 …
The Effect Of Thyroid Hormone On The Expression Of A7 Myosin Heavy Chain Mrna In Xenopus Laevis, Bradley Thomas Butkovich
The Effect Of Thyroid Hormone On The Expression Of A7 Myosin Heavy Chain Mrna In Xenopus Laevis, Bradley Thomas Butkovich
Master's Theses
It has long been known that thyroid hormone (TH) is responsible for metamorphosis in tadpoles. It is also known that A7 MHC, an adult muscle isoform, is expressed in adult Xenopus laevis frogs, but not in larvae. Furthermore, the appearance of A7 corresponds with the onset of metamorphosis. The present study investigated the relationship between TH and the expression of A7 MHC mRNA in Xenopus laevis. Isolated tails in culture and 6-n-propyl 2-thiouracil (PTU) treated tails were treated with TH and the presence of A7 mRNA analyzed with in-situ hybridization, and RT-PCR. It was found that TH caused substantial …
The Effects Of 2,4-Dichlorophenoxyacetic Acid On The Diazotrophic Soil Microbial Community, Denise M. Brown
The Effects Of 2,4-Dichlorophenoxyacetic Acid On The Diazotrophic Soil Microbial Community, Denise M. Brown
Master's Theses
This study measures the effects of 2,4- dichlorophenoxyacetic acid (2,4-D) on growth and nitrogen fixation capabilities of the native microbial soil community during eight field trials conducted over an eight month period. After application of 2,4-D, soil samples were analyzed for enumeration of diazotrophic and general microbial communities, and for nitrogenase activity as measured by the acetylene reduction assay (ARA). Statistical analyses were conducted using Minitab. Results show that 2,4-D significantly stimulated growth of diazotrophic microbes in 87.5% of the trials and was found to have a stimulatory growth effect on the general microbes in 62.5% of the trials. A …
Feasibility Of Stocking Grass Carp (Ctenopharyngodon Idella; Cyprinidae) To Control Hydrilla (Hydrilla Verticillata; Hydrocharitaceae) In Lake Anna, Virginia, Paul Matthew Overton
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 …
Characterization Of A Newly Cloned Dna Damage- Inducible Gene From Saccharomyces Cerevisiae Strain D43, June-Home Chen
Characterization Of A Newly Cloned Dna Damage- Inducible Gene From Saccharomyces Cerevisiae Strain D43, June-Home Chen
Master's Theses
The identification and characterization of DNA damage-inducible genes is an important topic in the study of the integrity of the cellular genome. Previously, a TnlO-lacZ derivative was inserted randomly into yeast cells and the resulting mutants were screened for insertions in DNA damage-inducible genes. S. cerevisiae strain D43 was identified as one such TnlO-lacZ insertion mutant. DNA sequencing results show the insertion in D43 is located within the TDH2 gene, which encodes glyceraldehyde-3-phosphate dehydrogenase. Treatment of strain D43 with DNA damaging agents and heat shock suggest TDH2 is responsive to DNA damage, but not to heat shock. Haploid mutants carrying …
The Distribution Of Gamma-Aminobutyric Acid (Gaba) And Glutamate In The Electrosensory System Of The Channel Catfish, Ictalurus Punctatus, Christian M. Fay
The Distribution Of Gamma-Aminobutyric Acid (Gaba) And Glutamate In The Electrosensory System Of The Channel Catfish, Ictalurus Punctatus, Christian M. Fay
Master's Theses
No abstract provided.
The Effects Of High Colony Density On Filtration, Mortality And Behavior In The Zebra Mussel, Dreissena Polymorpha, Christopher A. Call
The Effects Of High Colony Density On Filtration, Mortality And Behavior In The Zebra Mussel, Dreissena Polymorpha, Christopher A. Call
Master's Theses
No abstract provided.
The Role Of Protein Kinases In The Regulation Of The Na+/H+ Antiporter In Xenopus Oocytes, Andre P. J. Kulisz
The Role Of Protein Kinases In The Regulation Of The Na+/H+ Antiporter In Xenopus Oocytes, Andre P. J. Kulisz
Master's Theses
No abstract provided.
Density Dependent Limitations And Vertical Position Of Diatoms In A Periphyton Mat, Ronald E. Johnson
Density Dependent Limitations And Vertical Position Of Diatoms In A Periphyton Mat, Ronald E. Johnson
Master's Theses
No abstract provided.
Sculpins As Predators Of Lake Trout Eggs And Larvae: An Assessment Of Their Predatory Capabilities And Constraints, Heather C. Biga
Sculpins As Predators Of Lake Trout Eggs And Larvae: An Assessment Of Their Predatory Capabilities And Constraints, Heather C. Biga
Master's Theses
No abstract provided.
Afferent And Efferent Connections Of The Octavolateral Cerebellum In The Channel Catfish, Ictalurus Punctatus, Richard C. Rayborn
Afferent And Efferent Connections Of The Octavolateral Cerebellum In The Channel Catfish, Ictalurus Punctatus, Richard C. Rayborn
Master's Theses
No abstract provided.
Microglial Reactivity To N-Methyl-D-Aspartate (Nmda) Induced Excitotoxicity In The Immature Rat Brain, Laia Acarin
Microglial Reactivity To N-Methyl-D-Aspartate (Nmda) Induced Excitotoxicity In The Immature Rat Brain, Laia Acarin
Master's Theses
No abstract provided.