Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

2005

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 571 - 600 of 3257

Full-Text Articles in Life Sciences

Digenic Control Of Colouration In The Two-Spot Gourami Trichogaster Trichopterus Trichopterus, Jack Frankel Aug 2005

Digenic Control Of Colouration In The Two-Spot Gourami Trichogaster Trichopterus Trichopterus, Jack Frankel

Department of Biology Faculty Publications

Labyrinth  fishes  of  the  families  Anabantidae,  Belontiidae,Helostomatidae,  and  Osphronemidae  comprise the  tradi-tional  anabantoids,  a  group  of  about  80  relatively  small African  and  southeast  Asian  species (Linke  1991).  Many of  the  anabantoids  are  popular  with  aquarium  hobbyists because of their interesting reproductive behaviours, with males of most species brooding eggs in their mouths or in floating bubble nests (Vevers 1980; Linke 1991; Axelrod and Vorderwinkler 1995; Mills 2000). They have also beenthe focus of several environmental, morphological, and gene-tic  investigations  (Sommer  1982;  Gosline  1985;  Waki-yama  et  al. 1997;  Frankel  1992,  2001).  The  two-spot gourami,   Trichogaster  trichopterus  trichopterus  Pallas (Osphronemidae),  is  one …


Effects Of Resistance Training Volume And Variety On Dietary Intake And Mood State In Untrained Subject, Suzette K. Smith Aug 2005

Effects Of Resistance Training Volume And Variety On Dietary Intake And Mood State In Untrained Subject, Suzette K. Smith

Loma Linda University Electronic Theses, Dissertations & Projects

Background: While there is research on the effects of aerobic training on various aspects of mood state and nutrient intake, little is known of the effect of resistance training on these variables.

Purpose: To examine the effects of resistance training (RT) volume and variety on total energy (kcal) and macronutrient intake, and mood states in a healthy, untrained population.

Method:The investigation was part of a prospective experimental study examining the effects of three RT protocols on body composition and strength. An initial 102, healthy, untrained male and female participants, ages 20-40, were recruited, and randomized into one of three …


Group 13 Hox Proteins Interact With The Mh2 Domain Of R-Smads And Modulate Smad Transcriptional Activation Functions Independent Of Hox Dna Binding Capability, Thomas M. Williams, Melissa E. Williams, Joanne H. Heaton, Thomas D. Gelehrter, Jeffrey W. Innis Aug 2005

Group 13 Hox Proteins Interact With The Mh2 Domain Of R-Smads And Modulate Smad Transcriptional Activation Functions Independent Of Hox Dna Binding Capability, Thomas M. Williams, Melissa E. Williams, Joanne H. Heaton, Thomas D. Gelehrter, Jeffrey W. Innis

Biology Faculty Publications

Interactions with co-factors provide a means by which HOX proteins exert specificity. To identify candidate protein interactors of HOXA13, we created and screened an E11.5–E12.5, distal limb bud yeast two-hybrid prey library. Among the interactors, we isolated the BMP-signaling effector Smad5, which interacted with the paralogous HOXD13 but not with HOXA11 or HOXA9, revealing unique interaction capabilities of the AbdB-like HOX proteins. Using deletion mutants, we determined that the MH2 domain of Smad5 is necessary for HOXA13 interaction.

This is the first report demonstrating an interaction between HOX proteins and the MH2 domain of Smad proteins. HOXA13 and HOXD13 …


Ecology Of The Plankton Of Lakes Wapalanne And Ocquittunk In Sussex County, New Jersey, Malgorzata Barbara Drazek-Falah Aug 2005

Ecology Of The Plankton Of Lakes Wapalanne And Ocquittunk In Sussex County, New Jersey, Malgorzata Barbara Drazek-Falah

Theses, Dissertations and Culminating Projects

The diversity of planktonic organisms was studied for seven months in Lake Wapalanne and Lake Ocquittunk (Stokes State Forest), Sussex County, New Jersey. Relative abundance and species diversity were studied as well as water quality including parameters: temperature, pH, dissolved oxygen, conductivity and depth of lakes. The data of seasonal changes in abundance of organisms and water quality was compared between both lakes.

Three stations were set up along the straight line on Lake Wapalanne, buoyed by diatometers, which were used for diatom collection. There were also three stations located along the sides of Lake Ocquittunk arbitrary picked. Plankton samples …


The Importance Of Athletic Training Students Performing On-Field Evaluations, Amisha Patel Aug 2005

The Importance Of Athletic Training Students Performing On-Field Evaluations, Amisha Patel

All-Inclusive List of Electronic Theses and Dissertations

Context: It is unclear the frequency with which athletic training students perform on-field evaluations. Objective: The purpose of this study is to: (1) quantify the frequency senior ATSs observe, assist, and perform on-field evaluations during their clinical rotations; and (2) assess the senior ATSs perceptions of their experiences during on-field evaluations. Design: A 28-item survey entitled Survey of Senior Level Athletic Training Students Perceptions of Quality and Quantity of On-Field Evaluations During Clinical Rotations was developed based on a comprehensive literature review. The survey was grouped as follows: 3 demographic questions, 8 Likert scale statements, 9 "check all that apply", …


An Electromyographic Assessment Of Lumbar Paraspinal Muscles During Core Stability Exercises, Alicia Marleina Osuna Aug 2005

An Electromyographic Assessment Of Lumbar Paraspinal Muscles During Core Stability Exercises, Alicia Marleina Osuna

All-Inclusive List of Electronic Theses and Dissertations

Objective: Clinicians often use Swiss balls in exercise regimens to recruit activity of the paraspinal musculature. However, we do not know if muscle activity differences exist while performing an exercise on a stable or unstable surface. Design and Settings: A 1 X 2 factorial with repeated measures design guided this study. The single within-subjects factor was a core stability exercise with 2 levels: a stable condition (chair) and an unstable condition (Thera-band® exercise ball). The dependent variables were the integrated electromyography (I-EMG) amplitude of the left and right lumbar paraspinal musculature. Subjects: Sixteen moderately active and healthy male subjects (age: …


Therapeutic Benefits Of Ultrasound Can Be Achieved And Maintained With 1 Mhz, 4 Era Ultrasound Treatment, Lori B. Meyer Aug 2005

Therapeutic Benefits Of Ultrasound Can Be Achieved And Maintained With 1 Mhz, 4 Era Ultrasound Treatment, Lori B. Meyer

All-Inclusive List of Electronic Theses and Dissertations

Context: Thermal ultrasound has been used for the past two decades because of its ability to increase underlying local tissue temperatures promoting healing. It is recommended that ultrasound treatment be performed on a 2-3 ERA area for 10 minutes. However, clinicians often need to treat larger areas using ultrasound, clinicians may add to the possible treatment sights and not rely on or purchase other machines. Research has yet to investigate if therapeutic levels can be obtained by increasing the treatment time. Objective: To investigate if increasing the duration of an ultrasound treatment with a treatment area of 4 timesthe sound …


The Effect Of Exercise On The Threshold Frequency Of An Electrically Induced Muscle Cramp, Hiroki Sato Aug 2005

The Effect Of Exercise On The Threshold Frequency Of An Electrically Induced Muscle Cramp, Hiroki Sato

All-Inclusive List of Electronic Theses and Dissertations

Context: It has been observed that subjects that have experienced an exercise associated muscle cramp (EAMC) exhibited decreases in the threshold frequency (TF) of an electrical induced muscle cramp (EIMC). Hovvever, it is not known if this change was due to the exercise alone. Objective: To determine if full effort football conditioning exercises cause a shift in TF of an EIMC. Design: A 2 X 2 folly repeated measures factorial design was used for this study. The two independent variables were condition (rest, and exercise), and time (pre, and post). Setting: Subjects: Nine NCAA Division IAA football players participating in …


Street Trees In The Urban Forest Canopy: Portland, Oregon, Joseph Poracsky, David Banis Aug 2005

Street Trees In The Urban Forest Canopy: Portland, Oregon, Joseph Poracsky, David Banis

Geography Faculty Publications and Presentations

Attempts to identify the contribution of street trees to the overall urban forest of a city have been rare and lack consensus on how to measure that contribution – percentage of trees, percentage of canopy cover, or percentage of leaf area. The actual numeric values presented in the literature also vary over a broad range and often are based on estimates, extrapolations from aggregated data, or simply stated with no empirical data referenced. This study was undertaken to evaluate the contribution of street trees to canopy in Portland, Oregon. The study involved both visual and digital analysis of multi-band aerial …


The Effects Of An Analgesic (Biofreeze®) On The Motoneuron Pool Excitability Of The Soleus Muscle, Desiree R. Barth Aug 2005

The Effects Of An Analgesic (Biofreeze®) On The Motoneuron Pool Excitability Of The Soleus Muscle, Desiree R. Barth

All-Inclusive List of Electronic Theses and Dissertations

Objective: The purpose of this study was to determine the effects on the Hoffman reflex and motor response with an analgesic (Biofreeze®). Design: The study was a 2X6 design. The independent variables in this study were treatment and time. The dependent variables were the H-reflex (volts) and the M response (volts). Treatment was randomly assigned to control for the effects of order. Setting: This study took place in the Exercise Physiology Laboratory located in the Health and Human Performance Building at Indiana State University. Subjects: 14 volunteers who were physically active and had no known neurological problems. Measurements: Skin and …


Ankle Bracing Does Not Affect Force Development During A Single-Legged Vertical Jump, John M. Ibarra Aug 2005

Ankle Bracing Does Not Affect Force Development During A Single-Legged Vertical Jump, John M. Ibarra

All-Inclusive List of Electronic Theses and Dissertations

Objective: The effect of prophylactic ankle bracing on functional performance and isolated joint torque has been well studied. However, the potential effect of external 111 ankle support on force production during a sport-specific task remains unknown. Thus, the purpose of this study was to examine the potential effects of two widely used prophylactic ankle braces on lower extremity force development while performing a onelegged vertical jump. Design and Setting: A 1 x 3 factorial was used in this study. The single independent variable was ankle brace with 3 levels: 1) Semi-rigid ankle brace; 2) Lace-up style brace; and 3) control …


B.R. Wells Rice Research Studies 2004, R. J. Norman, J. F. Meullenet, K. A.K. Moldenhauer Aug 2005

B.R. Wells Rice Research Studies 2004, R. J. Norman, J. F. Meullenet, K. A.K. Moldenhauer

Arkansas Agricultural Experiment Station Research Series

No abstract provided.


Use Of Borate In Semi-Chemical Pulping, Promodh K. Veguru Aug 2005

Use Of Borate In Semi-Chemical Pulping, Promodh K. Veguru

Masters Theses

The original Neutral Sulfite Semi-Chemical (NSSC) pulping process used sodium sulfite as the principle cooking chemical and had the disadvantage of sulfur emission problems. Considerable research was conducted to investigate the use of other chemicals including sodium hydroxide, but was not completely satisfactory. Several mills adapted a sodium carbonate based process but experienced slower pulping and reduced physical properties. The objective of this research is to study the use of borate as a pulping chemical in sodium carbonate semi-chemical pulping. The experimental plan included digester cooks; controls with pure sodium carbonate, and the other with partially borate autocausticized sodium carbonate. …


Baseline Susceptibility Of Western Corn Rootworm (Coleoptera: Crysomelidae) To Cry3bb1 Bacillus Thuringiensis Toxin, Blair D. Siegfried, Ty T. Vaughn, Terrence A. Spencer Aug 2005

Baseline Susceptibility Of Western Corn Rootworm (Coleoptera: Crysomelidae) To Cry3bb1 Bacillus Thuringiensis Toxin, Blair D. Siegfried, Ty T. Vaughn, Terrence A. Spencer

Department of Entomology: Faculty Publications

Susceptibility to Cry3Bb1 toxin from Bacillus thuringiensis (Bt) was determined for western corn rootworm, Diabrotica virgifera virgifera LeConte, neonates from both laboratory and field populations collected from across the Corn Belt. Rootworm larvae were exposed to artificial diet treated with increasing Cry3Bb1 concentrations, and mortality and growth inhibition were evaluated after 4Ð7 d. The range of variation in Bt susceptibility indicated by growth inhibition was similar to that indicated by mortality. Although interpopulation variation in susceptibility was observed, the magnitude of the differences was comparable with the variability observed between generations of the same population. In general, the toxin was …


Flight Behavior Of Methyl-Parathion-Resistant And –Susceptible Western Corn Rootworm (Coleoptera: Chrysomelidae) Populations From Nebraska, Jenny A. Stebbing, Lance J. Meinke, Steve E. Naranjo, Blair Siegfried, Robert J. Wright, Laurence D. Chandler Aug 2005

Flight Behavior Of Methyl-Parathion-Resistant And –Susceptible Western Corn Rootworm (Coleoptera: Chrysomelidae) Populations From Nebraska, Jenny A. Stebbing, Lance J. Meinke, Steve E. Naranjo, Blair Siegfried, Robert J. Wright, Laurence D. Chandler

Department of Entomology: Faculty Publications

Relative flight behavior of methyl-parathion-resistant and -susceptible western corn rootworm, Diabrotica virgifera virgifera LeConte populations, was studied as part of a larger effort to characterize the potential impact of insecticide resistance on adult life history traits and to understand the evolution and spread of resistance. A computer interfaced autograph was used to compare flight of resistant and susceptible individuals, and flight of resistant individuals with and without prior exposure to methyl-parathion. In each case, mean trivial and sustained flight durations were compared among treatments. In general, there were few differences in trivial or sustained flight characteristics as affected by beetle …


First Report Of Crown And Stem Rot Of Orchid (Orchis Palustris) Caused By Sclerotinia Minor, C. Eken, S. Ercişli, A. Eşitken, E. Demirci, G. Y. Yuen Aug 2005

First Report Of Crown And Stem Rot Of Orchid (Orchis Palustris) Caused By Sclerotinia Minor, C. Eken, S. Ercişli, A. Eşitken, E. Demirci, G. Y. Yuen

Department of Plant Pathology: Faculty Publications

Orchis palustris Jacq. is a wild orchid native to wetlands in eastern Anatolia. During June of 2003, near Erzurum, Turkey, a decline of this orchid was observed in several meadows that had been irrigated for forage production. Stems were chlorotic, wilted, and collapsed. There was a soft, watery rot at the crowns and lower stems. White mycelium and black sclerotia formed on necrotic stem and crown tissues. The fungus was isolated from sclerotia on potato dextrose agar (PDA) and identified as Sclerotinia minor Jagger on the basis of small sclerotia (0.5 to 2.5 mm long) scattered throughout the colonies (2). …


Grain Quality Of Brazilian Maize Genotypes As Influenced By Nitrogen Level, Aildson P. Duarte, Stephen C. Mason, David S. Jackson, Jorge De C. Kiehl Aug 2005

Grain Quality Of Brazilian Maize Genotypes As Influenced By Nitrogen Level, Aildson P. Duarte, Stephen C. Mason, David S. Jackson, Jorge De C. Kiehl

Department of Food Science and Technology: Faculty Publications

Maize (Zea mays L.) is an important crop in Brazil, and concerns about grain quality are increasingly important with increasing exports and use of grain for specific end-uses. A wide range of genotypes are grown and N application is required to produce high yields. The objectives of these studies were to: (i) determine N application effects on the kernel hardness and breakage susceptibility of a wide range of Brazilian genotypes ranging from dent to flint kernel types and (ii) determine relationships among kernel hardness and breakage susceptibility tests, yield and N and oil concentration. Three studies were conducted with …


Molecular Serotyping Of Escherichia Coli O26:H11, Lisa M. Durso, James L. Bono, James E. Keen Aug 2005

Molecular Serotyping Of Escherichia Coli O26:H11, Lisa M. Durso, James L. Bono, James E. Keen

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Serotyping is the foundation of pathogenic E. coli diagnostics; however, few laboratories have this capacity. We developed a molecular serotyping protocol that targets, genetically, the same somatic and flagellar antigens of E. coli O26:H11 used in traditional serotyping. It correctly serotypes strains untypeable by traditional methods, affording primary laboratories serotyping capabilities.


Improving Profit In The Flower Growing Business, Gerry Parlevliet Aug 2005

Improving Profit In The Flower Growing Business, Gerry Parlevliet

Agriculture reports

Flower growing is a business. It can be a very profitable business. Just as in any enterprise the success depends very much on the knowledge, skill, tools and business acumen the owner brings to the operation. All small businesses face similar hurdles to achieving success. A small proportion grow and become highly profitable, the bulk allow the owner operator to make a living but unfortunately a percentage of enterprises fold up after a relatively short time or are maintained in a sub profitable form. This bulletin will provide some experiences, tools, suggestions for new flower businesses and for those that …


Microencapsulating Properties Of Trehalose And Of Its Blends With Sucrose And Fructose, Marina Cerdeira, Silvana Martini, Maria L. Herrera Aug 2005

Microencapsulating Properties Of Trehalose And Of Its Blends With Sucrose And Fructose, Marina Cerdeira, Silvana Martini, Maria L. Herrera

Nutrition, Dietetics, and Food Sciences Faculty Publications

A low melting fraction of milk fat (LMF), with a dropping point (MDP) of 16.7 °C, was encapsulated by freeze-drying emulsions formulated with trehalose or its blends with 30 wt% lactose or sucrose as hydrophilic phase, and with a mixed of 50 wt% of the palmitic sucrose esters (SE) β-170 and β-1670 as emulsifiers. Trehalose or trehalose/sucrose matrices were very efficient to encapsulate LMF (retention values were 82.8%± 3.2% and 90.5%± 3.7%, dry basis, respectively), whereas trehalose/lactose showed a significant decline in initial retention (42.5%± 2.5%, dry basis). The role of emulsion stability, water content, physical state of the matrix, …


Regulatable Gene Expression Systems For Gene Therapy Applications: Progress And Future Challenges, Shyam Goverdhana, Mariana Puntel, Weidong Xiong, Jeffrey Zirger, Carlos Barcia, James Curtin, Eric Soffer, Sonali Mondkar, Gwendalyn King, Jinwei Hu, Marianela Candolfi, Diane Greengold, Pedro Lowenstein, Maria Castro Aug 2005

Regulatable Gene Expression Systems For Gene Therapy Applications: Progress And Future Challenges, Shyam Goverdhana, Mariana Puntel, Weidong Xiong, Jeffrey Zirger, Carlos Barcia, James Curtin, Eric Soffer, Sonali Mondkar, Gwendalyn King, Jinwei Hu, Marianela Candolfi, Diane Greengold, Pedro Lowenstein, Maria Castro

Articles

Gene therapy aims to revert diseased phenotypes by the use of both viral and nonviral gene delivery systems. Substantial progress has been made in making gene transfer vehicles more efficient, less toxic, and nonimmunogenic and in allowing long-term transgene expression. One of the key issues in successfully implementing gene therapies in the clinical setting is to be able to regulate gene expression very tightly and consistently as and when it is needed. The regulation ought to be achievable using a compound that should be nontoxic, be able to penetrate into the desired target tissue or organ, and have a half-life …


Immune-Endocrine Interactions In The Lizard Sceloporus Undulatus Hyacinthinus: Testing An Assumption Of The Immunocompetence Handicap Hypothesis, Mukta Chakraborty Aug 2005

Immune-Endocrine Interactions In The Lizard Sceloporus Undulatus Hyacinthinus: Testing An Assumption Of The Immunocompetence Handicap Hypothesis, Mukta Chakraborty

All-Inclusive List of Electronic Theses and Dissertations

The immunocompetence handicap hypothesis (IHH) was proposed by Folstad and Karter ( 1992) to describe the role of the endocrine system in ensuring honesty of sexual signaling. Numerous studies have investigated the assumptions of the IHH, but currently there is mixed evidential support in favor of the IHH. The first chapter of this thesis is a review examinining these studies, their limitations, and proposed alternative models and future directions. The second chapter of this thesis presents a study in which we experimentally assesss the testosterone immunosuppression assumption in adult male Sceloporus undulatus lizards. We manipulated circulating androgen levels (Day 0) …


Sara Positively Controls Bap-Dependent Biofilm Formation In Staphylococcus Aureus, María P. Trotonda, Adhar C. Manna, Ambrose L. Cheung, Iñigo Lasa, José R. Penadés Aug 2005

Sara Positively Controls Bap-Dependent Biofilm Formation In Staphylococcus Aureus, María P. Trotonda, Adhar C. Manna, Ambrose L. Cheung, Iñigo Lasa, José R. Penadés

Dartmouth Scholarship

The biofilm-associated protein Bap is a staphylococcal surface protein involved in biofilm formation. We investigated the influence of the global regulatory locus sarA on bap expression and Bap-dependent biofilm formation in three unrelated Staphylococcus aureus strains. The results showed that Bap-dependent biofilm formation was diminished in the sarA mutants by an agr-independent mechanism. Complementation studies using a sarA clone confirmed that the defect in biofilm formation was due to the sarA mutation. As expected, the diminished capacity to form biofilms in the sarA mutants correlated with the decreased presence of Bap in the bacterial surface. Using transcriptional fusion and …


Selective Breeding For High Endurance Running Increases Hindlimb Symmetry, Theodore Garland Jr., Patricia W. Freeman Aug 2005

Selective Breeding For High Endurance Running Increases Hindlimb Symmetry, Theodore Garland Jr., Patricia W. Freeman

School of Natural Resources: Faculty Publications

Comparative studies provide correlational evidence of morphological adaptations for high locomotor performance, such as the classical indicators of cursoriality in mammals, long limbs and high metatarsal/femur ratios. More recently, enlarged femoral condyles have been suggested as an adaptation for high endurance running in the genus Homo. Asymmetry of locomotor appendages should adversely affect locomotor abilities, but this has not been studied in a rigorous evolutionary context. We used experimental evolution to test for morphological adaptations associated with high voluntary wheel running in selectively bred lines of mice. Surprisingly, the classical indicators of cursoriality had not evolved in concert with …


Spread Of An Exotic Fish-Gill Trematode: A Far-Reaching And Complex Problem, Andrew J. Mitchell, Robin M. Overstreet, Andrew E. Goodwin, Thomas M. Brandt Aug 2005

Spread Of An Exotic Fish-Gill Trematode: A Far-Reaching And Complex Problem, Andrew J. Mitchell, Robin M. Overstreet, Andrew E. Goodwin, Thomas M. Brandt

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Centrocestus formosanus, the gill trematode, has caused serious losses among fish raised by tropical fish producers since the early 1980s and is believed to be harmful to wild fish populations, including the federally listed endangered fountain darter (Etheostoma fonticola), in the Comal River near San Marcos, Texas. The parasite appears to infect in many fishes from Hawaii, Florida, Texas, and Utah. The gill trematode has a complex life cycle involving definitive hosts (aquatic birds and occasionally some mammals) and intermediate hosts (aquatic snails and several fish species). In the United States, the green heron (Butorides virescens …


Ascidians Of South Padre Island, Texas, With A Key To Species, Gretchen Lambert, Zen Faulkes, Charles C. Lambert, Virginia L. Scofield Aug 2005

Ascidians Of South Padre Island, Texas, With A Key To Species, Gretchen Lambert, Zen Faulkes, Charles C. Lambert, Virginia L. Scofield

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

The ascidians of South Padre Island, Texas were surveyed in August 2004. Because the subtidal area is limited to soft sediments, the survey was restricted to marina floats and pilings, harbor buoys, boat hulls and other artificial substrates which offer suitable attachment surfaces for ascidians. Fifteen species were documented, with multiple species representing each of the three orders of ascidians. None of the species found in this survey are native, suggesting they were all introduced through boat traffic. About half the species were found in a reproductive state, however, indicating that they have established local breeding populations.


Habitat-Specific Diet Of The Mottled Sculpin And Its Impact On Benthic Invertebrate Community Structure, Brendan M. Earl Aug 2005

Habitat-Specific Diet Of The Mottled Sculpin And Its Impact On Benthic Invertebrate Community Structure, Brendan M. Earl

Masters Theses

The relationships between predators and their prey are important and influential components in the structure of ecological communities. These interactions not only impact the species involved, but can also have a wide range of direct and indirect effects that resonate throughout the community. In Michigan trout streams, one of the main predators of benthic invertebrates is the mottled sculpin (Cottus bairdi) whose diet and selective predation may influence benthic invertebrate community structure. Using gastric lavage, the stomach contents of sculpins from both erosional and depositional habitats were collected and analyzed to determine the main prey types, prey preference, …


Fluorescent Photoinduced Electron Transfer (Pet) Cation Sensors Derived From Natural Products, Kenny Loo Aug 2005

Fluorescent Photoinduced Electron Transfer (Pet) Cation Sensors Derived From Natural Products, Kenny Loo

Theses, Dissertations and Culminating Projects

Two new second generation fluorescent switches that are based on the chromophore-spacer-receptor architecture are reported in this thesis. The fluorescence modulation of these switches is a result of quenching or initiating photoinduced electron transfer (PET) between the chromophore and the receptors due to cation binding. These two molecules utilize an alkaloid, anabasine, as the proton receptor, and function as fluorescent off-on-off switches with decreasing pH. One of these molecules also utilizes a coumarin as the chromophore, making it the first rationally designed fluorescent PET system based on natural products. Further studies of two well-known first generation fluorescent switches to achieve …


Determining The Phylogenetic Relationship Of A Collection Of Hydra Strains And Species Using The Mitochondrial Genes : Lrrna, Trna-Trp And Coii, Jacob Zuckman Aug 2005

Determining The Phylogenetic Relationship Of A Collection Of Hydra Strains And Species Using The Mitochondrial Genes : Lrrna, Trna-Trp And Coii, Jacob Zuckman

Theses, Dissertations and Culminating Projects

The discovery of the mitochondrial DNA (mtDNA) in the early 1960’s ushered in the field of organellar genetics. Evidence from both genetic and physical techniques has demonstrated that mtDNA are generally circular in structure, and that they represent the vestigial structure of the ancestral prokaryotic endosymbiont genome (Nosek et al., 1998). The more than 90 vertebrates and invertebrates sequenced to date have been found to have a remarkably constant gene content. With few exceptions, each contains the genes for 13 energy pathway proteins, the 2 RNA components of mitochondrial ribosomes (23S and 16S rRNA), and 22 transfer RNAs (Pont-Kingdon et …


Extraocular Muscle Activity, Rapid Eye Movements And The Development Of Active And Quiet Sleep, Adele M. H. Seelke, Andrew J. Gall, Karl Æ. Karlsson, Mark S. Blumberg Aug 2005

Extraocular Muscle Activity, Rapid Eye Movements And The Development Of Active And Quiet Sleep, Adele M. H. Seelke, Andrew J. Gall, Karl Æ. Karlsson, Mark S. Blumberg

Faculty Publications

Rapid eye movements (REMs), traditionally measured using the electrooculogram (EOG), help to characterize active sleep in adults. In early infancy, however, they are not clearly expressed. Here we measured extraocular muscle activity in infant rats at 3 days of age (P3), P8 and P14-15 in order to assess the ontogeny of REMs and their relationship with other forms of sleep-related phasic activity. We found that the causal relationship between extraocular muscle twitches and REMs strengthened during the first two postnatal weeks, reflecting increased control of the extraocular muscles over eye movements. As early as P3, however, phasic bursts of extraocular …