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  • METEOROLOGY AND CLIMATOLOGY  (2)
  • 557.7  (1)
  • Recombinant DNA  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The plasminogen activator family from the salivary gland of the vampire bat Desmodus rotundas: cloning and expression
    Amsterdam : Elsevier
    Gene 105 (1991), S. 229-237 
    Details
    ISSN: 0378-1119
    Keywords: Recombinant DNA ; cDNA cloning ; fibrinolysis ; nucleotide sequence ; serine protease ; transient expression
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(91)90155-5
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Ice nucleus concentrations measured during the 1975 Florida Area Cumulus Experiment /FACE/ (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Ice nuclei measurements were made aboard a cloud-base aircraft during the 1975 Florida Area Cumulus Experiment. Two techniques were used to obtain the ice nuclei concentrations; membranes were collected and analyzed using the NCAR membrane development chamber and continuous ice nuclei concentrations were obtained using the NCAR acoustical counter. Results showed that the membrane technique failed to effectively detect ice nuclei in this maritime tropical area. However, the concentrations recorded by the acoustical counter showed natural afternoon diurnal increases which may have ramifications on cloud development and seeding potential within the particular study area.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Journal of Applied Meteorology; 19; June 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Airborne measurements of cloud forming nuclei and aerosol particles at Kennedy Space Center, Florida (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Results of airborne measurements of the sizes and concentrations of aerosol particles, ice nuclei, and cloud condensation nuclei that were taken at Kennedy Space Center, Florida, are presented along with a detailed description of the instrumentation and measuring capabilities of the University of Washington airborne measuring facility (Douglas B-23). Airborne measurements made at Ft. Collins, Colorado, and Little Rock, Arkansas, during the ferry of the B-23 are presented. The particle concentrations differed significantly between the clean air over Ft. Collins and the hazy air over Little Rock and Kennedy Space Center. The concentrations of cloud condensation nuclei over Kennedy Space Center were typical of polluted eastern seaboard air. Three different instruments were used to measure ice nuclei: one used filters to collect the particles, and the others used optical and acoustical methods to detect ice crystals grown in portable cloud chambers. A comparison of the ice nucleus counts, which are in good agreement, is presented.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NASA-CR-160359 , NWC-TM-3667
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Effects of Temperature and Light on Methane Production of Widespread Marine Phytoplankton (2021)
    Details
    Publication Date: 2021-12-01
    Description: Methane (CH4) production in the ocean surface mixed layer is a widespread but still largely unexplained phenomenon. In this context marine algae have recently been described as a possible source of CH4 in surface waters. In the present study we investigated the effects of temperature and light intensity (including daylength) on CH4 formation from three widespread marine algal species Emiliania huxleyi, Phaeocystis globosa, and Chrysochromulina sp. Rates of E. huxleyi increased by 210% when temperature increased in a range from 10°C to 21.5°C, while a further increase in temperature (up to 23.8°C) showed reduction of CH4 production rates. Our results clearly showed that CH4 formation of E. huxleyi is controlled by light: When light intensity increased from 30 to 2,670 μmol m−2 s−1, CH4 emission rates increased continuously by almost 1 order of magnitude and was more than 1 order of magnitude higher when the daylength (light period) was extended from 6/18 hr light-dark cycle to continuous light. Furthermore, light intensity is also an important factor controlling CH4 emissions of Chrysochromulina sp. and P. globosa and could therefore be a species-independent regulator of phytoplankton CH4 production. Based on our results, we might conclude that extensive blooms of E. huxleyi could act as a main regional source of CH4 in surface water, since blooming of E. huxleyi is related to the seasonal increase in both light and temperature, which also stimulate CH4 production. Under typical global change scenarios, E. huxleyi will increase its CH4 production in the future.
    Keywords: 551.9 ; 557.7 ; marine phytoplacton ; CH4 production ; temperature influence ; light intensity influence ; daylength influence
    Language: English
    Type: map
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    CITATION GEO-LEO
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