Upper limit of temperature

Evolutionary Adaptation to Temperature. Vii. Extension of the Upper Thermal Limit of Escherichia Coli.

What factors influence the ability of populations to adapt to extreme environments that lie outside their current tolerance limits? We investigated this question by exposing experimental populations of the bacterium Escherichia coli to lethally high temperatures. We asked: (1) whether we could obtain thermotolerant mutants with an extended upper thermal limit by this selective screen; (2) wheth...

Upper limit of the lifetime of 16B.

The exact location of the drip lines is one of the most stringent tests of nuclear structure models. The predictions for stability of nuclei along the proton drip line can be tested up to very heavy nuclei. Beyond the proton drip line, the large Coulomb barrier and the angular momentum barrier can lead to very long lifetimes for proton-unbound nuclei ~proton radioactivity! @1#. Several of these...

Upper limit on the transition temperature for non-ideal Bose gases

In this paper we show that for a non-ideal Bose gas there exists an upper limit on the transition temperature above which Bose-Einstein condensation cannot occur regardless of the pressure applied. Such upper limits for some realistic Bose gases are estimated. This result implies that there may also exist an upper limit on the transition temperature of super-

Nuclear ordering in lithium and an upper limit on its ambient pressure superconducting transition temperature.

We have discovered spontaneous ordering of nuclear spins in lithium metal by NMR measurements at very low temperatures. In low magnetic fields, B<0.2 mT, the NMR spectra show a pronounced low-frequency anomaly. Also, nonadiabatic response to a slowly varying magnetic field was observed. A rich phase diagram with three different nonparamagnetic regions is proposed. We estimate a critical spin te...

The Upper Limit of C-14 Age?