Sökning: "Erik Ahlberg"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Erik Ahlberg.

  1. 1. Speeding up the Atmosphere : Experimental oxidation studies of ambient and laboratory aerosols using a flow reactor

    Författare :Erik Ahlberg; MERGE: ModElling the Regional and Global Earth system; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Secondary organic aerosols; oxidation flow reactor; volatile organic compounds; climate;

    Sammanfattning : Apart from gases, the air we breath consist of tiny, so called, aerosol particles. A cubic metre of air in a relatively clean environment can consist of several billion aerosol particles. The impact of these particles on human health and on climate is significant. LÄS MER

  3. 2. The Origin of Tetrapod Limbs and Girdles: Fossil and Developmental Evidence

    Författare :Catherine Anne Boisvert; Per Erik Ahlberg; Rolf Ohlsson; Johan Ledin; Lennart Olsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organism biology; Organismbiologi;

    Sammanfattning : Around 375 million years ago, the first tetrapods appeared, marking one of the most important events in vertebrate evolutionary history. The fin to limb transition saw the appearance of fingers and a weight bearing pelvic girdle. LÄS MER

  4. 3. Glycosaminoglycan Biosynthesis and Function in Zebrafish Development : Sugars Shaping Skeletons

    Författare :Judith Habicher; Johan Ledin; Per Erik Ahlberg; Marion Kusche-Gullberg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Heparan sulfate (HS) and chondroitin/dermatan sulfate (CS/DS) proteoglycans are glycosylated proteins with important roles in animal development and homeostasis. HS and CS/DS are long, linear glycosaminoglycan (GAG) polysaccharides and attached to a core protein they form proteoglycans. LÄS MER

  5. 4. The role of the extracellular matrix in zebrafish cartilage development

    Författare :Judith Habicher; Per Erik Ahlberg; Johan Ledin; Lwaki Ebarasi; Uppsala universitet; []
    Nyckelord :Biologi med inriktning mot zoologisk utvecklingsbiologi; Biology with specialization in Animal Development;

    Sammanfattning : .... LÄS MER

  7. 5. Development and three-dimensional histology of vertebrate dermal fin spines

    Författare :Anna Jerve; Per Erik Ahlberg; Martin Brazeau; Tatjana Haitina; Philippe Janvier; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fin spine; paleontology; early vertebrate; histology; development; Biology with specialization in Evolutionary Organismal Biology; Biologi med inriktning mot evolutionär organismbiologi;

    Sammanfattning : Jawed vertebrates (gnathostomes) consist of two clades with living representatives, the chondricthyans (cartilaginous fish including sharks, rays, and chimaeras) and the osteichthyans (bony fish and tetrapods), and two fossil groups, the "placoderms" and "acanthodians". These extinct forms were thought to be monophyletic, but are now considered to be paraphyletic partly due to the discovery of early chondrichthyans and osteichthyans with characters that had been previously used to define them. LÄS MER