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

Digital Commons Network™

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

Biology

Discipline
Institution
Publication Year
Publication
Publication Type
File Type

Articles 2071 - 2100 of 5255

Full-Text Articles in Entire DC Network

Translational Nutrition: A Review Of The Application Of Nutrition Science, Regulation, And Outreach Case Study: Farm Fresh Rhode Island, Eliza Zalis Apr 2014

Translational Nutrition: A Review Of The Application Of Nutrition Science, Regulation, And Outreach Case Study: Farm Fresh Rhode Island, Eliza Zalis

Public & Community Service Studies Student Scholarship

This project examines the avenues by which nutrition science impacts individuals in society. It examines the factors that influence consumer behavior and food choice and the importance of health literacy in guiding nutrition and health. It elucidates the role of the Food and Drug Administration (FDA) in regulating food labeling and the implications that such regulation has on consumer perception and possible health outcomes. Further, this project outlines recently proposed changes to the “Nutrition Facts” panel. In investigating nutrition education and outreach programs, this project includes a case study of Farm Fresh Rhode Island and the organization’s nutrition initiatives.

Go to article

Sexual Dimorphism Of Staminate- And Pistillate-Phase Flowers Of Saponaria Officinalis (Bouncing Bet) Affects Pollinator Behavior And Seed Set, Dana A. Dudle, Leah M. Freestone, Peter Konieczny, Michael B. Tobin, Michael M. Britton Apr 2014

Sexual Dimorphism Of Staminate- And Pistillate-Phase Flowers Of Saponaria Officinalis (Bouncing Bet) Affects Pollinator Behavior And Seed Set, Dana A. Dudle, Leah M. Freestone, Peter Konieczny, Michael B. Tobin, Michael M. Britton

Biology Faculty publications

The sequential separation of male and female function in flowers of dichogamous species allows for the evolution of differing morphologies that maximize fitness through seed siring and seed set. We examined staminate- and pistillate-phase flowers of protandrous Saponaria officinalis for dimorphism in floral traits and their effects on pollinator attraction and seed set. Pistillate-phase flowers have larger petals, greater mass, and are pinker in color, but due to a shape change, pistillate-phase flowers have smaller corolla diameters than staminate-phase flowers. There was no difference in nectar volume or sugar content one day after anthesis, and minimal evidence for UV nectar …

Go to article

Extracts Of Trichostema Lanatum Inhibit The Growth Of Gram-Positive Bacteria And An Escherichia Coli Δtolc Mutant Strain, Matthew C. Fleming Mar 2014

Extracts Of Trichostema Lanatum Inhibit The Growth Of Gram-Positive Bacteria And An Escherichia Coli Δtolc Mutant Strain, Matthew C. Fleming

Seaver College Research And Scholarly Achievement Symposium

The Chumash Native Americans of Southern California have well-documented traditions of using plants for medicinal purposes. If a specific plant has traditionally been used for the treatment of cuts, wounds and infections, it may contain chemicals with anti-bacterial properties. One plant that fits these criteria is Trichostema lanatum (woolly blue curls). We tested extracts of T. lanatum for their ability to inhibit the growth of a variety of bacteria. Because of the widespread use of antibiotics over the past sixty years bacteria are evolving greater resistance to known antibiotics, but unfortunately the rate of antibiotic discovery has diminished during the …

Go to article

Cardiovascular Health Among Us And Argentine University Students: A Comparative Study Of Behaviors And Risk Factors, Gina Fitzgerald, Gabriella Smith Mar 2014

Cardiovascular Health Among Us And Argentine University Students: A Comparative Study Of Behaviors And Risk Factors, Gina Fitzgerald, Gabriella Smith

Seaver College Research And Scholarly Achievement Symposium

Cardiovascular disease for some time has been the leading cause of death in the Western world. Primary prevention is the only way to halt the onset of cardiovascular disease, yet there is little information on the prevalence of risk factors for cardiovascular disease in young adults. This study seeks to evaluate students from the Catholic University of Argentina and Pepperdine University of America for the prevalence of CVD risk factors, as well as knowledge of CVD and daily habits that contribute to heart health. Thus we compared two cultures with very different lifestyles and prevalence of risk factors. We hypothesized …

Go to article

The Effect Of Shear Stress, Potassium, And Adenosine On Α-1 Adrenergic Vasoconstriction Of Rat Soleus Feed Arteries, Tanner J. Heckle Mar 2014

The Effect Of Shear Stress, Potassium, And Adenosine On Α-1 Adrenergic Vasoconstriction Of Rat Soleus Feed Arteries, Tanner J. Heckle

Seaver College Research And Scholarly Achievement Symposium

During exercise, sympathetic nerve activity increases, augmenting the release of the neurotransmitter norepinephrine (NE) at the arterial wall and into the blood. NE binds to arterial adrenergic receptors to cause vasoconstriction, yet arteries in contracting skeletal muscle dilate during exercise. Previous evidence from Ives et al. suggests that heat and acidosis may partially inhibit constriction resulting from α-1 adrenergic receptors (termed sympatholysis). Our lab has previously demonstrated that rat soleus feed arteries respond to sympathetic signaling solely by α-1 adrenoceptors. We hypothesized that increased levels of arterial wall shear stress, potassium, or adenosine also contribute to sympatholysis, thereby reducing sympathetic …

Go to article

Influence Of Temperature On The Tensile Strength Of Spider Silk (Araneus Gemmoides), Victoria Lekson Mar 2014

Influence Of Temperature On The Tensile Strength Of Spider Silk (Araneus Gemmoides), Victoria Lekson

Seaver College Research And Scholarly Achievement Symposium

Temperature ranges between day and night in southern California can be as great as 30°C and may influence vital functioning of ectothermic organisms. Arachnids produce silks from a pair of spinnerets in their abdomen and rely on variance in protein composition to make different types of silks. Temperature may influence tensile strength of filaments. We tested the effects of temperature on tensile strength of dragline silk of five specimens of Araneus gemmoides (orb-weaver) which were collected from Malibu Creek State Park in the Santa Monica Mountains of southern California, under five temperature conditions. Each specimen was placed in a 0.0283 …

Go to article

Nanoparticle Exposure Activates An Inositol Triphosphate Receptor-Dependent Elevation Of Reactive Oxygen Species And Apoptosis In Human Alveolar Lung Cells, Briana Manes, Sarah Alvarado Mar 2014

Nanoparticle Exposure Activates An Inositol Triphosphate Receptor-Dependent Elevation Of Reactive Oxygen Species And Apoptosis In Human Alveolar Lung Cells, Briana Manes, Sarah Alvarado

Seaver College Research And Scholarly Achievement Symposium

The signaling of cell stress in response to organelle dysfunction, toxin exposure, and mutation is complex; generating responses that can include adaptation, or in severe cases, cellular apoptosis. Nanoparticles (20-100 nm diameter) have been shown to induce cell stress in lung cells, potentially identifying a cause of lung disease in areas with high levels of particulate-based air pollution. This study examines the effect of carbon black (CB) and titanium dioxide (TiO2) nanoparticles on stress signaling and apoptosis in cultured A549 human alveolar epithelial cells. CB and TiO2 powders were dispersed throughout a buffered solution containing bovine serum albumin using probe …

Go to article

Engaging Non-Scientists In Stem Through Problem-Based Learning And Service Learning, Andrew Tawfik, Rebecca J. Trueman, Matthew M. Lorz Mar 2014

Engaging Non-Scientists In Stem Through Problem-Based Learning And Service Learning, Andrew Tawfik, Rebecca J. Trueman, Matthew M. Lorz

Interdisciplinary Journal of Problem-Based Learning

This study follows the evolution of a single biology course designed for non-science majors. In its original design, the course used only traditional pedagogical techniques, such as lecture and textbook homework assignments. Over several iterations of the course, the class combined problem-based learning (PBL) and service learning to better support student knowledge. For this study, our goal was for students to learn biology concepts as they engaged in a lake cleanup project within the greater Chicago metropolitan area. Data sources consisted of pretest, posttest, and final exam scores to assess learning. The results suggest the combination of PBL and service …

Go to article

Chronic Corticosterone Exposure Persistently Elevates The Expression Of Memory-Related Genes In The Lateral Amygdala And Enhances The Consolidation Of A Pavlovian Fear Memory, Melissa S. Monsey, Lara M. Boyle, Melinda L. Zhang, Caroline P. Nguyen, Hope G. Kronman, Kristie T. Ota, Ronald S. Duman, Jane R. Taylor, Glenn E. Schafe Mar 2014

Chronic Corticosterone Exposure Persistently Elevates The Expression Of Memory-Related Genes In The Lateral Amygdala And Enhances The Consolidation Of A Pavlovian Fear Memory, Melissa S. Monsey, Lara M. Boyle, Melinda L. Zhang, Caroline P. Nguyen, Hope G. Kronman, Kristie T. Ota, Ronald S. Duman, Jane R. Taylor, Glenn E. Schafe

Publications and Research

Chronic exposure to stress has been widely implicated in the development of anxiety disorders, yet relatively little is known about the long-term effects of chronic stress on amygdala-dependent memory formation. Here, we examined the effects of a history of chronic exposure to the stress-associated adrenal steroid corticosterone (CORT) on the consolidation of a fear memory and the expression of memory-related immediate early genes (IEGs) in the lateral nucleus of the amygdala (LA). Rats received chronic exposure to CORT (50 μg/ml) in their drinking water for 2 weeks and were then titrated off the CORT for an additional 6 days followed …

Go to article

Spring 2014 Mar 2014

Spring 2014

Scientia

Q&A with Dean Koocher; Proud graduate discovers love of learning at DePaul; Intrepid biologist inspires lifelong lessons; Student organization spotlight: Psi Chi; Smart phones and synthetic bone capture Associate Professor Gabriela Gonzalez Aviles' interest; All for DePaul; Lab notes

Go to article

Cluster M Mycobacteriophages Bongo, Pegleg, And Rey With Unusually Large Repertoires Of Trna Isotypes, Welkin H. Pope, Kirk R. Anders, Madison Baird, Charles A. Bowman, Michelle M. Boyle, Gregory W. Broussard, Tiffany Chow, Kari L. Clase, Shannon Cooper, Kathleen A. Cornely, Randall J. Dejong, Veronique A. Delesalle, Lisa Deng, David Dunbar, Nicholas P. Edgington, Christina M. Ferreira, Kathleen Weston Hafer, Grant A. Hartzog, J. Robert Hatherill, Lee E. Hughes, Khristina Ipapo, Greg P. Krukonis, Christopher G. Meier, Denise L. Monti, Matthew R. Olm, Shallee T. Page, Craig L. Peebles, Claire A. Rinehart, Michael R. Rubin, Daniel A. Russell, Erin R. Sanders, Morgan Schoer, Christopher D. Shaffer, James Wherley, Edwin Vazquez, Han Yuan, Daiyuan Zhang, Steven G. Cresawn, Deborah Jacobs-Sera, Roger W. Hendrix, Graham F. Hatfull Mar 2014

Cluster M Mycobacteriophages Bongo, Pegleg, And Rey With Unusually Large Repertoires Of Trna Isotypes, Welkin H. Pope, Kirk R. Anders, Madison Baird, Charles A. Bowman, Michelle M. Boyle, Gregory W. Broussard, Tiffany Chow, Kari L. Clase, Shannon Cooper, Kathleen A. Cornely, Randall J. Dejong, Veronique A. Delesalle, Lisa Deng, David Dunbar, Nicholas P. Edgington, Christina M. Ferreira, Kathleen Weston Hafer, Grant A. Hartzog, J. Robert Hatherill, Lee E. Hughes, Khristina Ipapo, Greg P. Krukonis, Christopher G. Meier, Denise L. Monti, Matthew R. Olm, Shallee T. Page, Craig L. Peebles, Claire A. Rinehart, Michael R. Rubin, Daniel A. Russell, Erin R. Sanders, Morgan Schoer, Christopher D. Shaffer, James Wherley, Edwin Vazquez, Han Yuan, Daiyuan Zhang, Steven G. Cresawn, Deborah Jacobs-Sera, Roger W. Hendrix, Graham F. Hatfull

Chemistry & Biochemistry Faculty Publications

Genomic analysis of a large set of phages infecting the common host Mycobacterium smegmatis mc2155 shows that they span considerable genetic diversity. There are more than 20 distinct types that lack nucleotide similarity with each other, and there is considerable diversity within most of the groups. Three newly isolated temperate mycobacteriophages, Bongo, PegLeg, and Rey, constitute a new group (cluster M), with the closely related phages Bongo and PegLeg forming subcluster M1 and the more distantly related Rey forming subcluster M2. The cluster M mycobacteriophages have siphoviral morphologies with unusually long tails, are homoimmune, and have larger than average genomes …

Go to article

A Survey Of Biology Alternative Conceptions Among General Education Students In The Sultanate Of Oman, Abdullah Ambusaidi, Suliaman M. Al-Balushi, Saif Al-Hiji, Ali H. Al- Shuaili Mar 2014

A Survey Of Biology Alternative Conceptions Among General Education Students In The Sultanate Of Oman, Abdullah Ambusaidi, Suliaman M. Al-Balushi, Saif Al-Hiji, Ali H. Al- Shuaili

Journal of Educational and Psychological Studies

This study aimed at investigating Omani general education alternative conceptions in some biological concepts. To achieve this aim, a two-tier MCQs biology test, consisting of 40 items, was constructed. The test was verified by a panel of experts in science teaching to check its validity, whereas the reliability was calculated using Cronbach alpha for internal consistency. Alpha value was 0.85. The test was administered to 1013 students, randomly selected from four educational governorates in the Sultanate of Oman in the 2010/2011 school year. The results of the study showed that Omani general education students held several alternative conceptions in all …

Go to article

Effects Of Prey Abundance On Breeding Season Diet Of Northern Goshawks (Accipiter Gentilis) Within An Unusual Prey Landscape, Robert A. Miller, Jay D. Carlisle, Marc J. Bechard Mar 2014

Effects Of Prey Abundance On Breeding Season Diet Of Northern Goshawks (Accipiter Gentilis) Within An Unusual Prey Landscape, Robert A. Miller, Jay D. Carlisle, Marc J. Bechard

Intermountain Bird Observatory Publications and Presentations

A critical element of diet analysis is species adaptability to alternative prey sources. The breeding-season diet of Northern Goshawks (Accipiter gentilis) includes both mammalian and avian species, varies geographically, and is often dependent upon tree squirrels of the genera Sciurus andTamiasciurus. We studied alternative prey sources of Northern Goshawks in the South Hills of south-central Idaho, an area where tree squirrels are naturally absent and other prey frequently important in the diet of goshawks, such as smaller corvids, are uncommon. We quantified the diet of goshawks using nest cameras and surveyed abundance of prey using line …

Go to article

Homology Modeling And Molecular Docking For The Science Curriculum, Owen M. Mcdougal, Nic Cornia, Chris Mallory, Julia Thom Oxford, Tim Andersen Mar 2014

Homology Modeling And Molecular Docking For The Science Curriculum, Owen M. Mcdougal, Nic Cornia, Chris Mallory, Julia Thom Oxford, Tim Andersen

Chemistry and Biochemistry Faculty Publications and Presentations

DockoMatic 2.0 is a powerful open source software program (downloadable from sourceforge.net) that allows users to utilize a readily accessible computational tool to explore biomolecules and their interactions. This manuscript describes a practical tutorial for use in the undergraduate curriculum that introduces students to macromolecular structure creation, ligand binding calculations, and visualization of docking results. A student procedure is provided that illustrates the use of DockoMatic to create a homology model for the amino propeptide region (223 amino acids with two disulfide bonds) of collagen α1 (XI), followed by molecular docking of the commercial drug Arixtra® to the …

Go to article

Genome Wide Association Mapping Of Grain Arsenic, Copper, Molybdenum And Zinc In Rice (Oryza Sativa L.) Grown At Four International Field Sites, Gareth J. Norton, Alex Douglas, Brett Lahner, Elena Yakubova, Mary Lou Guerinot, Shannon R.M Pinson, Lee Tarpley, George C. Eizenga, Steve P. Mcgrath, Fang-Jie Zhao Feb 2014

Genome Wide Association Mapping Of Grain Arsenic, Copper, Molybdenum And Zinc In Rice (Oryza Sativa L.) Grown At Four International Field Sites, Gareth J. Norton, Alex Douglas, Brett Lahner, Elena Yakubova, Mary Lou Guerinot, Shannon R.M Pinson, Lee Tarpley, George C. Eizenga, Steve P. Mcgrath, Fang-Jie Zhao

Dartmouth Scholarship

The mineral concentrations in cereals are important for human health, especially for individuals who consume a cereal subsistence diet. A number of elements, such as zinc, are required within the diet, while some elements are toxic to humans, for example arsenic. In this study we carry out genome-wide association (GWA) mapping of grain concentrations of arsenic, copper, molybdenum and zinc in brown rice using an established rice diversity panel of ~300 accessions and 36.9 k single nucleotide polymorphisms (SNPs). The study was performed across five environments: one field site in Bangladesh, one in China and two in the US, with …

Go to article

The Patriot Talon (Feburary 24, 2014), University Of Texas At Tyler Feb 2014

The Patriot Talon (Feburary 24, 2014), University Of Texas At Tyler

The Patriot Talon/The Patriot

The official newspaper for the University of Texas at Tyler before it was changed back to the UT Tyler Patriot. Articles in this issue include: This is all she can physically see & still plays better than you; Progress made on purchase; Tennis player continues to lose eyesight because of retinal disease, still competes on the court; Construction to start next month; Waiting in line for the treadmill a problem? University officials debate whether HPC too small for campus; Is your personal information safe with the University?The Power of Identity; We can make equality happen, it just takes a little …

Go to article

Texas Salamanders, U.S. Department Of The Interior Feb 2014

Texas Salamanders, U.S. Department Of The Interior

KIP Articles

No abstract provided.

Go to article

C. Elegans Cep-1/P53 And Bec-1 Are Involved In Dna Repair, Sandy Hoffman, Daniel Martin, Alicia Meléndez, Jill Bargonetti Feb 2014

C. Elegans Cep-1/P53 And Bec-1 Are Involved In Dna Repair, Sandy Hoffman, Daniel Martin, Alicia Meléndez, Jill Bargonetti

Publications and Research

p53 is a transcription factor that regulates the response to cellular stress. Mammalian p53 functions as a tumor suppressor. The C. elegans p53, cep-1, regulates DNA-damage induced germline cell death by activating the transcription of egl-1 and ced-13. We used the C. elegans model to investigate how, in the whole animal, different forms of DNA damage can induce p53-dependent versus p53-independent cell death and DNA repair. DNA damage was induced by ultraviolet type C (UVC) radiation, or 10-decarbamoyl mitomycin C (DMC, an agent known to induce mammalian p53-independent cell death). Wild-type or cep-1 loss-of-function mutant animals were assayed for germline …

Go to article

Direct-To-Consumer Genetic Testing In The College Classroom: Knowledge, Attitudes, And Concerns Of Introductory Biology Students, Nicanor Austriaco Feb 2014

Direct-To-Consumer Genetic Testing In The College Classroom: Knowledge, Attitudes, And Concerns Of Introductory Biology Students, Nicanor Austriaco

Biology Faculty Publications

Pioneered by companies like 23andMe.com, deCODEme.com, and Navigenics.com, direct-to-consumer genetic testing refers to genetic tests that are marketed directly to consumers via television, print media, or the Internet. This kind of testing provides access to a customer’s genetic information without necessarily involving either a medical health care professional or a genetic counselor in the process. In recent years, a course offered to medical and graduate students at Stanford University has included an option for students to undergo personal genotyping, raising the possibility that direct-to-consumer genetic testing could also be incorporated into undergraduate biology courses to enhance student learning. In this …

Go to article

Increase In Ethanol Yield Via Elimination Of Lactate Production In An Ethanol-Tolerant Mutant Of Clostridium Thermocellum, Ranjita Biswas, Sandeep Prabhu, Lee R. Lynd, Adam M. Guss Feb 2014

Increase In Ethanol Yield Via Elimination Of Lactate Production In An Ethanol-Tolerant Mutant Of Clostridium Thermocellum, Ranjita Biswas, Sandeep Prabhu, Lee R. Lynd, Adam M. Guss

Dartmouth Scholarship

Large-scale production of lignocellulosic biofuel is a potential solution to sustainably meet global energy needs. One-step consolidated bioprocessing (CBP) is a potentially advantageous approach for the production of biofuels, but requires an organism capable of hydrolyzing biomass to sugars and fermenting the sugars to ethanol at commercially viable titers and yields. Clostridium thermocellum, a thermophilic anaerobe, can ferment cellulosic biomass to ethanol and organic acids, but low yield, low titer, and ethanol sensitivity remain barriers to industrial production. Here, we deleted the hypoxanthine phosphoribosyltransferase gene in ethanol tolerant strain of C. thermocellum adhE*(EA) in order to allow use …

Go to article

Deletion Of Aif1 But Not Of Yca1/Mca1 Protects Saccharomyces Cerevisiae And Candida Albicans Cells From Caspofungin-Induced Programmed Cell Death, Nicanor Austriaco, Christopher Chin, Faith Donaghey, Kathrine Helming, Morgan Mccarthy, Stephen Rogers Feb 2014

Deletion Of Aif1 But Not Of Yca1/Mca1 Protects Saccharomyces Cerevisiae And Candida Albicans Cells From Caspofungin-Induced Programmed Cell Death, Nicanor Austriaco, Christopher Chin, Faith Donaghey, Kathrine Helming, Morgan Mccarthy, Stephen Rogers

Biology Faculty Publications

Caspofungin was the first member of a new class of antifungals called echinocandins to be approved by a drug regulatory authority. Like the other echinocandins, caspofungin blocks the synthesis of β(1,3)-D-glucan of the fungal cell wall by inhibiting the enzyme, β(1,3)-D-glucan synthase. Loss of β(1,3)-D-glucan leads to osmotic instability and cell death. However, the precise mechanism of cell death associated with the cytotoxicity of caspofungin was unclear. We now provide evidence that Saccharomyces cerevisiae cells cultured in media containing caspofungin manifest the classical hallmarks of programmed cell death (PCD) in yeast, including the generation of reactive oxygen species (ROS), the …

Go to article

Tribute To Tinbergen: The Place Of Animal Behavior In Biology, Joan E. Strassmann Feb 2014

Tribute To Tinbergen: The Place Of Animal Behavior In Biology, Joan E. Strassmann

Biology Faculty Research

Tinbergen is famous for emphasizing behavioral fieldwork and experimentation under natural circumstances, for founding the field of ethology, for getting a Nobel Prize, and for mentoring Richard Dawkins. He is known for dividing behavior studies into physiology, development, natural selection, and evolutionary history. In the decades since Tinbergen was active, some of the best research in animal behavior fuses Tinbergen's questions, connecting genes to behavioral phenotypes, for example. Behavior is the most synthetic of the life sciences, because observing the actions of an organism can tell us what all those physical and physiological traits are for. Insights from behavior tell …

Go to article

The Influence Of Topographic And Dynamic Cyclic Variables On The Distribution Of Small Cetaceans In A Shallow Coastal System, Marijke N. De Boer, Mark P. Simmonds, Peter J.H. Reijnders, Geert Aarts Jan 2014

The Influence Of Topographic And Dynamic Cyclic Variables On The Distribution Of Small Cetaceans In A Shallow Coastal System, Marijke N. De Boer, Mark P. Simmonds, Peter J.H. Reijnders, Geert Aarts

Ecology Collection

The influence of topographic and temporal variables on cetacean distribution at a fine-scale is still poorly understood. To study the spatial and temporal distribution of harbour porpoise Phocoena phocoena and the poorly known Risso’s dolphin Grampus griseus we carried out land-based observations from Bardsey Island (Wales, UK) in summer (2001–2007). Using Kernel analysis and Generalized Additive Models it was shown that porpoises and Risso’s appeared to be linked to topographic and dynamic cyclic variables with both species using different core areas (dolphins to the West and porpoises to the East off Bardsey). Depth, slope and aspect and a low variation …

Go to article

The Covert World Of Fish Biofluorescence: A Phylogenetically Widespread And Phenotypically Variable Phenomenon, John S. Sparks, Robert C. Schelly, W. Leo Smith, Matthew P. Davis, Dan Tchernov, Vincent A. Pieribone, David F. Gruber Jan 2014

The Covert World Of Fish Biofluorescence: A Phylogenetically Widespread And Phenotypically Variable Phenomenon, John S. Sparks, Robert C. Schelly, W. Leo Smith, Matthew P. Davis, Dan Tchernov, Vincent A. Pieribone, David F. Gruber

Publications and Research

The discovery of fluorescent proteins has revolutionized experimental biology. Whereas the majority of fluorescent proteins have been identified from cnidarians, recently several fluorescent proteins have been isolated across the animal tree of life. Here we show that biofluorescence is not only phylogenetically widespread, but is also phenotypically variable across both cartilaginous and bony fishes, highlighting its evolutionary history and the possibility for discovery of numerous novel fluorescent proteins. Fish biofluorescence is especially common and morphologically variable in cryptically patterned coral-reef lineages. We identified 16 orders, 50 families, 105 genera, and more than 180 species of biofluorescent fishes. We have also …

Go to article

Conformational Regulation Of Membrane Localization And Activation Of Talin, Pallavi Dwivedi Jan 2014

Conformational Regulation Of Membrane Localization And Activation Of Talin, Pallavi Dwivedi

ETD Archive

Talin is a cytosolic protein which is known to be one of the key players involved in integrin mediated cell adhesion dependent processes, including blood coagulation, and tissue remodeling. It connects the extracellular matrix with the actin cytoskeleton. Talin comprises of a head domain (talin-H) and a rod domain (talin-R). Talin-H is further subdivided in F0, F1, F2 and F3 domains. Talin-R contains 13 contiguous helical bundle domains (R1-R13) followed by an actin binding dimerization domain (DD). The F3 domain contains a key integrin binding site that regulates integrin activation. In our previous studies, we have shown that cytosolic talin …

Go to article

Evaluating Cecal Ligation And Puncture- Induced Kidney Injury In Diabetic Meprin Deficient Mice, Kasheena Burris Jan 2014

Evaluating Cecal Ligation And Puncture- Induced Kidney Injury In Diabetic Meprin Deficient Mice, Kasheena Burris

Theses

Diabetic nephropathy (DN) is the leading cause of end stage renal disease (ESRD), and is associated with high morbidity and mortality rates. Key histological changes observed in DN include accumulation of extracellular matrix (ECM) proteins and tubulointerstitial fibrosis. Meprins are metalloproteinases that are abundantly expressed in the brush border membranes of proximal kidney tubules. Meprins are also expressed in leukocytes (monocytes and macrophages) and podocytes. Meprins cleave/degrade extracellular matrix (ECM) proteins such as collagen IV, collagen VI, fibronectin, laminin, and nidogen-1 in vitro. Meprins have been implicated in the pathology of DN. Sepsis is a complex medical condition, where the …

Go to article

Airborne Staphylococcus Aureus In The Biology Labs At Southern Adventist University, Harrison Filler Jan 2014

Airborne Staphylococcus Aureus In The Biology Labs At Southern Adventist University, Harrison Filler

Capstone Research Projects

Staphylococcus aureus has been of growing interest to the scientific community in recent years. It is not only easily transferred from one person to another, but its rapidly evolving antibiotic resistance has made it increasingly difficult to treat. Once thought to be a hospital-acquired disease, S. aureus is now often found in the community. Studies indicate that people and clothing can act as carriers of S. aureus not only directly, but through airborne particles. For these reasons a research experiment was designed to determine the prevalence of S. aureus in the microbiology lab and anatomy and physiology lab at Southern …

Go to article

Lifelines Winter 2014, Southern Adventist University Jan 2014

Lifelines Winter 2014, Southern Adventist University

Lifelines - Biology Department Newsletter

The Winter 2014 issue of Lifelines contains articles on a dinosaur dig in Wyoming, student missions to Lebanon, an alumni feature, undergraduate research, and a pictorial directory of 2014 biology and allied health graduates.

Go to article

A Selected Surveyo F Ocean Acidifcation's Effect On Coccolithophore And Other Marine Ecosystems, Taylor Zaw, Joel Wood, Anthony Gonzalez Jan 2014

A Selected Surveyo F Ocean Acidifcation's Effect On Coccolithophore And Other Marine Ecosystems, Taylor Zaw, Joel Wood, Anthony Gonzalez

Featured Research

With it's rapid rate of generation, the coccolithophore was expected to adapt to the altered pH levels relatively quickly. By analyzing several scientific studies concerning this algae's interaction with various water qualities, the species' response is clarified. These findings are compared to rudimentary data concerning pH levels taken along the coast of Malibu.

Go to article

Leaf Foliar Absorption In Pentagramma Triangularis And Polypodium Californicum, Justin Choe, Carlos Larios, William Prorok, Emily Rose Pierce Jan 2014

Leaf Foliar Absorption In Pentagramma Triangularis And Polypodium Californicum, Justin Choe, Carlos Larios, William Prorok, Emily Rose Pierce

Featured Research

In Riparian and moist zones of the Santa Monica Mountains of Southern California, ferns flourish. However, the Mediterranean climate they live in is subject to drought, and the area is currently facing the worst drought it has ever seen. With little moisture in the ground and streams drying up, these ferns are running out of sources of water. However, being on the coast, the area is subject to fog nightly. This research was done to see if ferns can do leaf foliar absorption, getting their water source from the air rather than the ground. We hypothesized that ferns do leaf …

Go to article

First Prev Next Last