Differential Effects of Temperature onE. coliand Synthetic Polyhydroxybutyrate/Polyphosphate Channels†

Biochemistry ◽  
2002 ◽  
Vol 41 (16) ◽  
pp. 5307-5312 ◽  
Author(s):  
S. Das ◽  
D. Seebach ◽  
R. N. Reusch
Keyword(s):  
Differential Effects ◽  
Effects Of Temperature

scholarly journals Differential Effects of Temperature and Lipids on the Gating of RyR and SR K+ Channels

2016 ◽  
Vol 110 (3) ◽  
pp. 266a ◽  
Author(s):  
Sam El-Ajouz ◽  
Elisa Venturi ◽  
Rebecca Sitsapesan
Keyword(s):  
K Channels ◽  
Differential Effects ◽  
Effects Of Temperature

Differential Effects of Temperature on Activity of LDH from Seal and Sheep Skin

1975 ◽  
Vol 95 (1) ◽  
pp. 77-82 ◽  
Author(s):  
Arnoldus Schytte Blix ◽  
Edvard B. Messelt ◽  
Hans J. Grav
Keyword(s):  
Differential Effects ◽  
Effects Of Temperature

scholarly journals Differential effects of temperature on cAMP-induced excitation, adaptation, and deadaptation of adenylate and guanylate cyclase in Dictyostelium discoideum.

1987 ◽  
Vol 105 (5) ◽  
pp. 2301-2306 ◽  
Author(s):  
P J Van Haastert
Keyword(s):  
Adenylate Cyclase ◽  
Dictyostelium Discoideum ◽  
Guanylate Cyclase ◽  
Enzyme Activities ◽  
Lag Time ◽  
Temperature Sensitive ◽  
Differential Effects ◽  
Continuous Stimulation ◽  
Effects Of Temperature ◽  
Extracellular Camp

Extracellular cAMP induces excitation of adenylate and guanylate cyclase in Dictyostelium discoideum. Continuous stimulation with cAMP leads to adaptation, while cells deadapt upon removal of the cAMP stimulus. Excitation of guanylate cyclase by cAMP has a lag time of approximately 1 s; excitation of adenylate cyclase is much slower with a lag time of 30 s. Excitation of both enzyme activities is less than twofold slower at 0 degrees C than at 20 degrees C. Adaptation of guanylate cyclase is very fast (t1/2 = 2.4 s at 20 degrees C), and virtually absent at 0 degrees C. Adaptation of adenylate cyclase is much slower (t1/2 = 110 s at 20 degrees C) but not very temperature sensitive (t1/2 = 290 s at 0 degrees C). At 20 degrees C, deadaptation of adenylate cyclase is about twofold slower than deadaptation of guanylate cyclase (t1/2 = 190 and 95 s, respectively). Deadaptation of adenylate cyclase is absent at 0 degrees C, while that of guanylate cyclase proceeds slowly (t1/2 = 975 s). The results show that excitation, adaptation, and deadaptation of guanylate cyclase have different kinetics and temperature sensitivities than those of adenylate cyclase, and therefore are probably independent processes.

Effect of temperature and hydrostatic pressure on algal respiration

1974 ◽  
Vol 52 (11) ◽  
pp. 2375-2379 ◽  
Author(s):  
Daniel H. Pope ◽  
Leslie R. Berger
Keyword(s):  
Hydrostatic Pressure ◽  
Dark Respiration ◽  
Anacystis Nidulans ◽  
Dunaliella Tertiolecta ◽  
Effect Of Temperature ◽  
Metabolic Processes ◽  
Differential Effects ◽  
Linear Fashion ◽  
Effects Of Temperature ◽  
Temperature And Pressure

Rates of dark respiration in Anacystis nidulans and Dunaliella tertiolecta, determined as loss of previously fixed 14CO2, were measured as a function of temperature and hydrostatic pressure. The rates of respiration in both algae decreased with decreased temperature over the range 25 to 5 °C in an approximately linear fashion and at 5 °C were only 10 to 20% of the rate at 25 °C. The rate of respiration by A. nidulans decreased with increased hydrostatic pressure. At 600 atm the rate was about 50% of that at 1 atm. Respiration by D. tertiolecta seemed to be unaffected by pressures to 600 atm. These results suggest that algal cells observed to occur in the deep oceans are potentially metabolically active at those depths; that they cannot survive for long periods of time solely through the utilization of previously stored materials; and that a heterotrophic mode of metabolism is most likely to explain their occurrence. The differential effects of temperature and pressure on various metabolic processes and growth of microalgae are also discussed.

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