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  • 1995-1999  (2)
  • 1955-1959
  • 1935-1939
  • Anoxia  (1)
  • Gelidiales phylogeny  (1)
  • 1
    Electronic Resource
    Electronic Resource
    A multigene phylogeny of the Gelidiales including nuclear large-subunit rRNA sequence data (1998)
    Springer
    Journal of applied phycology 10 (1998), S. 229-236 
    Details
    ISSN: 1573-5176
    Keywords: Gelidiales phylogeny ; gene evolution ; LSU ; rbc ; L ; SSU
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Partial sequences (1032 bp) of the nuclear-encoded large ribosomal RNA gene (LSU) were determined for 16 gelidialean species, and analyzed separately and in combination with plastid rbcL and nuclear SSU gene sequences. The number of informative characters and levels of sequence divergence among taxa are intermediate in LSU sequences as compared to that for rbcL and SSU. Analyses of the separate LSU, and a combined LSU, SSU, and rbcL data sets have identified early-diverging lineages within the Gelidiales including Gelidiella, Pterocladia, Pterocladiella, and a lineage including Gelidium and species classified in other genera. The relationships among most gelidialean taxa are well-resolved and well-supported by analyses of the combined data; however, the relationships of Ptilophora and Capreolia remain unclear. It is speculated that these two lineages have diverged from a common ancestor over an evolutionarily short period of time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008075429646
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Short-term anoxia does not impair protein turnover in isolated perfused turtle heart (1995)
    Springer
    Journal of comparative physiology 164 (1995), S. 622-628 
    Details
    ISSN: 1432-136X
    Keywords: Protein turnover ; Normoxia ; Anoxia ; Perfused heart ; Turtle, Trachemys sp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Protein turnover was studied under conditions of normoxia and anoxia in isolated perfused turtle (Trachemys (=Pseudemys) scripta elegans) hearts at 15 °C. Protein synthesis was measured by 3H-labelled phenylalanine incorporation into the protein pool. Protein degradation was studied using the protein synthesis inhibitor cycloheximide and measuring phenylalanine release from the heart. Heart rate, cardiac output and ventricle pressure development were unaffected by 2 h of anoxia. Protein synthesis rate was tenfold lower in turtle heart than in rat heart at their respective body temperatures. However, 1 h of anoxia did not affect the rate of protein synthesis in turle heat. RNA content of both ventricle and atria decreased after anoxic perfusion. Protein synthesis rates in atria were higher than those of ventricle under conditions of either anoxia or normoxia. Protein degradation rate did not change in cycloheximide-treated turtle hearts after 2 h of anoxia. These findings indicate that lack of oxygen per se does not affect protein turnover in the isolated perfused turtle heart. This feature presumably allows protein turnover to proceed in vivo during routine dives at elevated temperatures. Also, the turtle heart is a good model system to study the effects of anoxia on protein turnover without the potentially confounding factor of contractile failure. These hearts are very resistant to anoxia and well able to maintain contractility for extended periods of time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00389803
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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