Variation and modeling of the probability of plasmid loss as a function of growth rate of plasmid-bearing cells ofEscherichia coli during continuous cultures

1993 ◽  
Vol 41 (4) ◽  
pp. 395-404 ◽  
Author(s):  
Ridha Mosrati ◽  
Nabil Nancib ◽  
Joseph Boudrant
Keyword(s):  
Growth Rate ◽  
Ofescherichia Coli ◽  
Continuous Cultures ◽  
Plasmid Loss

Biology of Oscillatoria cf. chalybea, a 2-methylisoborneol producing blue-green alga of Mississippi catfish ponds

1995 ◽  
Vol 31 (11) ◽  
pp. 173-180 ◽  
Author(s):  
M. van der Ploeg ◽  
M. E. Dennis ◽  
M. Q. de Regt
Keyword(s):  
Growth Rate ◽  
Specific Growth ◽  
Light Availability ◽  
Continuous Light ◽  
Light Cycle ◽  
Blue Green Alga ◽  
Continuous Cultures ◽  
Effects Of Temperature ◽  
Catfish Ponds ◽  
Specific Growth Rates

Relative abundance of Oscillatoria cf. chalybea was monitored during May-November, 1993, in 40 ponds at four catfish farms located 50-100 km apart in west central Mississippi, USA. The occurrence of O. cf.chalybea coincided with the period that water temperatures remained above 20°C. In 70% of ponds, O. cf.chalybea was present for a period of 2-20 weeks. The alga recurred in all ponds where it had been present in 1990 and 1991. The effects of temperature and light availability on growth rate and 2-methylisoborneol (MIB) production of O. cf. chalybea were studied in continuous cultures. At 28°C, maximum specific growth rates were 0.8 d−1 (24 h light) and 0.6 d−1 (14 h light :10 h dark). Algal cells contained less MIB when adapted to the shorter light cycle than when grown under continuous light. Specific growth rate of O. cf.chalybea dropped from 0.3 to 0.1 d−1 when temperature was changed from 21 to 19.5°C (14 h light).

scholarly journals Extensive regulation compromises the extent to which DNA gyrase controls DNA supercoiling and growth rate ofEscherichia coli

1999 ◽  
Vol 266 (3) ◽  
pp. 865-877 ◽  
Author(s):  
Peter Ruhdal Jensen ◽  
Coen C. van der Weijden ◽  
Lars Bogø Jensen ◽  
Hans V. Westerhoff ◽  
Jacky L. Snoep
Keyword(s):  
Growth Rate ◽  
Dna Gyrase ◽  
Dna Supercoiling ◽  
Ofescherichia Coli
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