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  • Articles  (4)
  • Bacteria
  • Dissolved organic carbon
  • Springer  (4)
  • American Chemical Society
  • Marine Fisheries Research Department, Southeast Asian Fisheries Development Center
  • Molecular Diversity Preservation International
  • Physics  (4)
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  • Articles  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 2 (1968), S. 296-298 
    ISSN: 1432-0827
    Keywords: Calcium ; Lipid ; Bacteria ; Calcification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé On a fait ce travail pour determiner si le facteur responsable pour la liaison de calcium par un calcifableBacterionema matruchotii est dans la fraction lipide de la cellule. Des cellules congelees et sechees ont ete extraites par le chloroform-methanol. La fraction de chloroform-methanol, les cellules extraites et les cellules non traitees ont ete examinees pour la liaison de calcium. La fraction du chloroform-methanol et les cellules non traitees avaient la liaison de calcium. Les cellules extraites n'en avaient pas.
    Abstract: Zusammenfassung Diese Arbeit wurde durchgeführt um festzustellen, ob sich der Faktor für die Calcium-bindung, durch das calcifizierendeBacterionema matruchotii, in der Lipoidfraktion befindet. Die lyophiilisierten Zellen wurden mit Chloroform-Methanol extrahiert. Die Chloroform-Methanol-Fraktion, die extrahierten Zellen, sowie die nicht behandelten Zellen wurden auf eine Calciumbindung hin untersucht. Die Chloroform-Methanol-Fraktion und die nicht behandelten Zellen demonstrierten eine Calciumbindung. Die extrahierten Zellen hingegen nicht.
    Notes: Abstract This work was done to determine whether the factor responsible for calcium binding by a calcifiableBacterionema matruchotii is in the lipid fraction of the cell. Freeze-dried cells were extracted with chloroform-methanol. The chloroform-methanol fraction, the extracted cells and untreated cells were examined for calcium binding. The chloroform-methanol fraction and the untreated cells bound calcium. The extracted cells did not.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 116 (1978), S. 302-308 
    ISSN: 1420-9136
    Keywords: Bacteria ; Bubbles ; Scavenging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Four parameters that control the enrichment of bacteria in jet drops are bubble scavenging, drop size, drop position in the jet set, and the type of bacteria. Without the scavenging of bacteria as a bubble rises through the water it is doubtful that the observed enrichment factors, EF, greater than 1000 could be obtained. There is a maximum in EF as a function of top jet drop size, and the EF decreases from the top to the bottom drop of the jet set. The efficiency by which bubbles scavenge bacteria varies with species. Presumably these parameters apply in some degree to the EF of virus in jet drops. Dissolved organic material in natural waters can adsorb to bubbles and contribute to a large EF in jet drops, but there is a feedback mechanism whereby changes in bubble surface free energy modify the jet drop-size distribution. However, there is reason to believe this will not significantly influence the jet drop-size distribution produced by bubbles in the sea.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European biophysics journal 3 (1977), S. 69-77 
    ISSN: 1432-1017
    Keywords: Bacteria ; Photophobic response ; Rhodopsin ; Membrane ; Sensory transduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract A photosensory mechanism is proposed for Halobacterium halobium based on the observation of light-induced motor responses. Possible mechanisms of signal transduction in Halobacterium are discussed. Bacteriorhodopsin and the visual pigment rhodopsin are compared with respect to their structural and functional properties. The conclusion is drawn that Halobacterium may help to understand primary photochemical events of rhodopsin rather than the transduction mechanism of visual photoreceptors.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of statistical physics 80 (1995), S. 23-33 
    ISSN: 1572-9613
    Keywords: Bacteria ; singular Fokker-Planck equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A magnetotactic bacterium aligns itself along the magnetic field. When the field is reversed the bacterium makes a U-turn in the surrounding water. The turning is described by a Fokker-Planck equation for the angle ν, which is singular at the endpoints ν=0 and ν=π. The time needed for turning can be found exactly as a first-passage time. The probability distribution itself can be found in terms of an approximation for low temperature. To cover the regions near the endpoints singular perturbation theory is needed.
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