The temperature dependence of the Casimir force between a real metallic plate and a metallic sphere is analyzed on the basis of optical data concerning the dispersion relation of metals such as gold and copper. Realistic permittivities imply, together with basic thermodynamic considerations, that the transverse electric zero mode does not contribute. This results in observable differences from ...

The nucleation and growth of 2D layers of tetraphenyl porphyrin molecules on Ag(111) are studied with variable-temperature scanning tunneling microscopy. The organic/metal heteroepitaxy occurs by strict analogy to established principles for metal heteroepitaxy. A hierarchy of energy barriers for diffusion on terraces and along edges and around corners of adislands is established. The temperatur...

A diverse set of direct experimental observations and theoretical considerations supports the existence of fluidity in cell membranes (1) . Several membrane-dependent functions of Escherichia coli have been shown to exhibit biphasic Arrhenius plots with transition temperatures that are determined by the degree and configuration of the unsaturation of fatty acids incorporated into the membrane p...

Assuming the conventional Casimir setting with two thick parallel perfectly conducting plates of large extent with a homogeneous and isotropic medium between them, we discuss the physical meaning of the electromagnetic field energy W disp when the intervening medium is weakly dispersive but nondissipative. The presence of dispersion means that the energy density contains terms of the form d[ome...

By comparing neutrino uxes and central temperatures calculated from 1000 detailed numerical solar models, we derive improved scaling laws which show how each of the neutrino uxes depends upon the central temperature ( ux / T m); we also estimate uncertainties for the temperature exponents. With the aid of a one-zone model of the sun, we derive expressions for the temperature exponents of the ne...

By comparing neutrino fluxes and central temperatures calculated from 1000 detailed numerical solar models, we derive improved scaling laws which show how each of the neutrino fluxes depends upon the central temperature ~flux }T); we also estimate uncertainties for the temperature exponents. With the aid of a one-zone model of the Sun, we derive expressions for the temperature exponents of the ...

Cotton plants (Gossypium hirsutum L., var. Deltapine Smooth Leaf) were grown under controlled environmental conditions over a range of day/night temperatures from 20/15 to 40/35 C. Their photosynthetic characteristics were then measured over a comparable temperature range. Net photosynthesis tended stongly to be greatest, and intracellular resistance to CO(2) transport to be lowest, when the me...

Experimental data for the unimolecular decomposition of CS2 from the literature are analyzed by unimolecular rate theory with the goal of obtaining rate constants for the reverse reaction S + CS (+M) → CS2 (+M) over wide temperature and pressure ranges. The results constitute an important input for the kinetic modeling of CS2 oxidation. CS2 dissociation proceeds as a spin-forbidden process whos...

This study presents the temperature dependence of small signal parameters of GaN/SiC HEMTs across the 0–150◦C range. The changes with temperature for transconductance (gm), output impedance (Cds and Rds), feedback capacitance (Cdg), input capacitance (Cgs), and gate resistance (Rg) are measured. The variations with temperature are established for gm, Cds, Rds, Cdg, Cgs, and Rg in the GaN techno...

Using a previously derived QCD effective hamiltonian we find the masses of heavy quarkonia states. Non perturbative effects are included through temperature dependent gluonic condensates. We find that even a moderate change in these condensates in a hot hadronic environment (below the deconfining transition) is sufficient to significantly change the heavy meson masses. The study of hadronic mat...