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Results for "departments_tesim:"Department of Biological Sciences""
Functional Characterization of Homeodomain Transcription Factors and Retinoic Acid Signaling in Hematopoiesis
Improper regulation of hematopoiesis generates a spectrum of defects that range from anemia and embryonic lethality to leukemia. Identifying the molecular pathways that regulate hematopoiesis is therefore a major goal of both basic and clinical biology. Vertebrate hematopoiesis occurs in two...
Meiosis in eukaryotes includes a developmentally programmed pre-meiotic G2 phase arrest before the onset of MI division mediated by inhibitory phosphorylation of Cdk1. There are two inhibitory kinases, Wee1 and Myt1. Myt1 mediated Cyclin B-Cdk1 regulation serves as a conserved mechanism for...
Involvement of PI3K-Dependent Signal Transduction During the Integrated Control of Basal and Ligand-Biased Pituitary Cell FunctionsDownload
Within multicellular organisms, individual cells must communicate with one another in order to coordinate physiological functions. One of the ways this is achieved is through the production and release of chemical messengers, called hormones. Hormones alter the functions of their target cells by...
Individual and Seasonal Variation in Grizzly Bear Selection for a Railway and other Linear Features in Banff National Park, CanadaDownload
Mortality caused by collisions with trains affects numerous species globally and has increased recently to threaten the grizzly bear (Ursus arctos) population protected in Banff and Yoho National Parks, Canada. Although train collisions are the ultimate cause of mortality, the more proximate...
The Role of Apoptosis and Necrosis in Age-Dependent Enzymatic Mitochondrial Abnormalities in Individual Skeletal Muscle FibersDownload
Aging is associated with the functional decline of cells, tissues and organs affecting the lifespan of all organisms. Age-associated changes to the skeletal muscle such as decline in muscle mass and function is termed as sarcopenia. Sarcopenia results from fiber atrophy and loss of myofibers. We...
Gene expression and sensory structures in sponges: Explorations of sensory-neural origins in a non-bilaterian contextDownload
The nervous system is present in all but two animal phyla – one of them being Porifera, sponges. Sponges have no neurons and yet have organized behavior and finely tuned sensation. Furthermore, sponges have genes involved in the nervous system of other animals (informally called ‘neural’ genes)....
Nosema ceranae: A sweet surprise? Investigating the viability and infectivity of the honey bee (Apis mellifera L.) parasite N. ceranaeDownload
Nosema disease is a prominent malady among adult honey bees (Apis mellifera L.), caused by the microsporidian parasites Nosema apis and N. ceranae. The biology of N. apis is well understood, as this parasite was first described over a century ago. Unlike N. apis, N. ceranae is an emerging...
Ammonia oxidizers come from two different domains of life, the Archaea and Bacteria, and control a vital step in the global biogeochemical Nitrogen cycle; the conversion of ammonia to nitrite. They are abundant in a wide range of environments including marine and freshwaters, terrestrial soils,...