Sökning: "LOSS RATES"

Visar resultat 1 - 5 av 286 avhandlingar innehållade orden LOSS RATES.

  1. 1. Molecules and Dust around AGB stars : Mass-loss rates and molecular abundances

    Detta är en avhandling från Stockholm : Department of Astronomy, Stockholm University

    Författare :Sofia Ramstedt; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AGB stars; mass-loss; circumstellar abundances; NATURAL SCIENCES Physics Astronomy and astrophysics Formation and development of stars; NATURVETENSKAP Fysik Astronomi och astrofysik Stjärnors bildning och utveckling; Astronomy; astronomi;

    Sammanfattning : All stars with a stellar mass of about 0.8–8 MSun will end their lives as asymptotic giant branch (AGB) stars. Through their extensive mass loss the AGB stars constitutes an important source of nuclear processed material. LÄS MER

  2. 2. Dynamics of the Bacterial Genome Rates and Mechanisms of Mutation

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Sanna Koskiniemi; Uppsala universitet.; [2010]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bacteria; bacterial evolution; genome reduction; gene loss; serial passage; DNA homology; tranlesion DNA polymerase; stress; MEDICINE Microbiology; immunology; infectious diseases Microbiology; MEDICIN Mikrobiologi; immunologi; infektionssjukdomar Mikrobiologi; MEDICINE Microbiology; immunology; infectious diseases Microbiology Bacteriology; MEDICIN Mikrobiologi; immunologi; infektionssjukdomar Mikrobiologi Bakteriologi; Evolutionary Genetics; Evolutionär genetik; Mikrobiologi; Microbiology;

    Sammanfattning : Bacterial chromosomes are highly dynamic, continuously changing with respect to gene content and size via a number of processes, including deletions that result in gene loss. How deletions form and at what rates has been the focus of this thesis. In paper II we investigated how chromosomal location affects chromosomal deletion rates in S. LÄS MER

  3. 3. Investigations of species richness effects on ecosystem functioning using stream-living macroinvertebrates as model organisms

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Micael Jonsson; Umeå universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Species richness; species loss; process rates; ecosystem function; streams; macroinvertebrates; Ekologi; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi;

    Sammanfattning : The work in this thesis deals with effects of changed species richness on process rates among stream-living macroinvertebrates. Global biodiversity is decreasing rapidly and it is poorly known what the consequences of this loss may be for ecosystems and the services they provide. LÄS MER

  4. 4. Bone turnover markers and prediction of bone loss in elderly women

    Detta är en avhandling från Lund University

    Författare :Janaka Lenora; Lunds universitet.; Lund University.; [2009]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; bone turnover markers; DXA; elderly; osteoporosis; scintigraphy; Bone mineral density; quantitative ultrasound of the calcaneus; bone loss;

    Sammanfattning : Around 70,000 osteoporosis-related fractures occur in Sweden annually and approximately half of the women in western world will sustain a fragility fracture after the age of 50 years. Fracture preventive efforts require the identification of individuals who are at high risk. LÄS MER

  5. 5. Service Life Assessment of Harbor Structures - Case studies of chloride ingress into concrete and sheet piling corrosion rates

    Detta är en avhandling från Division of Building Materials, LTH, Lund University

    Författare :Henrik Wall; Lunds universitet.; Lund University.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chloride ingress; sampling methods; corrosion rates; sheet piling; ultra-sonic measurements; service life; durability; quay structures; harbor structures;

    Sammanfattning : Popular Abstract in English The two most used building materials in harbor structures are undoubtedly steel and concrete. These two materials are often combined in the structures of wharfs and quays where most steel sheet pile walls have cap beams of reinforced concrete. LÄS MER