Sökning: "developmental stages"

Visar resultat 1 - 5 av 198 avhandlingar innehållade orden developmental stages.

  1. 1. BMP - a key signaling molecule in specification and morphogenesis of sensory structures

    Författare :Vijay Kumar Jidigam; Lena Gunhaga; Jonas von Hofsten; Richard A. Lang; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BMP signaling; Placode morphogenesis; lens; retina; olfactory; otic; Developmental Biology; miljömedicinsk utvecklingsbiologi;

    Sammanfattning : Cranial placodes are transient thickenings of the vertebrate embryonic head ectoderm that will give rise to sensory (olfactory, lens, and otic) and non-sensory (hypophyseal) components of the peripheral nervous system (PNS). In most vertebrate embryos, these four sensory placodes undergo invagination. LÄS MER

  3. 2. Evolutionary ecology of ultraviolet-B radiation stress tolerance in amphibians

    Författare :Maarit Pahkala; Trevor Beebee; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; amphibians; anomalies; embryonic development; geographic variation; growth; Rana arvalis; Rana temporaria; survival; UV-B radiation; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; populationsbiologi; Population Biology;

    Sammanfattning : During the last decades many amphibian species and populations have experienced declines and extinctions in different parts of the world. Anthropogenic activities are believed to account for these declines, and one of the hypothesized causes has been the increased level of ultraviolet-B (UV-B) radiation due to depletion of the stratospheric ozone layer. LÄS MER

  4. 3. Long Noncoding RNA Mediated Regulation of Imprinted Genes

    Författare :Faizaan Mohammad; Chandrasekhar Kanduri; Kristian Helin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Genomic imprinting; noncoding RNA; epigenetics; chromatin; DNA methylation; Developmental biology; Utvecklingsbiologi; Molecular biology; Molekylärbiologi; Biology with specialization in Molecular Biology; Biologi med inriktning mot molekylärbiologi;

    Sammanfattning : Genomic imprinting is an epigenetic phenomenon that causes a subset of mammalian genes to be expressed from only one allele in a parent-of-origin manner. The defects in the imprinting regulation result in disorders that affect development, growth and metabolism. LÄS MER

  5. 4. Functional study of Nucleoporins Nup88 and Nup214 during Drosophila Development

    Författare :Nikos Xylourgidis; Christos Samakovlis; Valerie Doye; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mbo; Nup88; CAN; Nup214; NPC; CRM1; embargoed; NF-kB; REL; Dorsal; Dif; Drosophila; Developmental biology; Utvecklingsbiologi;

    Sammanfattning : More than a million macromolecules per minute pass through the nuclear envelope of a eukaryotic cell. An important challenge is to understand how the NPC coordinate efficiently the bi-directional trafficking necessary for the basal cellular activities and the rapid translocation of regulatory proteins in response to signaling. LÄS MER

  7. 5. Early development of the olfactory placode and early rostrocaudal patterning of the caudal neural tube

    Författare :Esther Maier; Lena Gunhaga; Fernando Giraldez; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; olfactory placode; caudal neural tube; Wnt; FGF; RA; BMP; Notch; patterning; Developmental biology; Utvecklingsbiologi; molekylärbiologi; Molecular Biology;

    Sammanfattning : The development of the nervous system is a complex process. Cell divisions, cell differentiation and signalling interactions must be tightly regulated. To comprehend the mature nervous system, we have to understand its assembly during development. LÄS MER