Although the lability of heparin in mild acid has been studied (l-4), the conditions for thermoinactivation have not been clearly defined. Thus, experiments were designed to evaluate the loss in anticoagulant activity of heparin solutions in varying hydrogen ion concentrations over a wide range of temperatures. Samples were adjusted to pH l-4 and 7, then held 1 hr at 25, 37, 48, 58, 68, 78, 88,...

We have determined the temperature dependence of DNA persistence length, a, using two different methods. The first approach was based on measuring the j-factors of short DNA fragments at various temperatures. Fitting the measured j-factors by the theoretical equation allowed us to obtain the values of a for temperatures between 5°C and 42°C. The second approach was based on measuring the equili...

Abstract. Here I review the temperature-dependence of heavy quarkonia correlators in potential models with three different screened potentials, and compare these to the results from lattice QCD. None of the potentials investigated yield results consistent with the lattice data, indicating that screening is likely not the mechanism for heavy quarkonia suppression. I also discuss a simple toy mod...

The object of this experiment was to measure the attenuation of sound waves in commercial aluminum as a function of temperature in the range between the temperature of boiling nitrogen (78*K) and room temperature (300'K). Several attenuation mechanisms have been known for some time; for instance, thermal loss mechanisms, which occur when a solid is compressed. The compressed parts become warmer...

– We present detailed measurements of the differential resistance (dV/dI) of stateof-the-art FM/AlOx/FM magnetic tunnel junctions (MTJ) as a function of applied bias and temperature. Temperature effects are particularly significant in physical quantities involving narrow features such as those at low-voltage bias. We show that the temperature evolution of the tunneling characteristics and, in p...

In the past it has already been shown that adsorption isotherms of liquid or solid lms are not described completely by the Frenkel Halsey Hill theory. Substrate roughness as well as thermal uctuations have to be taken into account in understanding the adsorption behavior. The inclusion of thermal uctuations into the adsorption theory has already been addressed and proven to provide an explanati...

The anomalous temperature dependence of NQR frequencies which is often observed in crystals in which there is reorientational motion of ions or molecules is considered. Two theories of the phenomena, the jump rotation theory and the pseudo-spin theory, are described, and their successes and failures are discussed. The importance of considering other properties such as pressure dependence of NQR...

A model of charged hole-pair bosons, with long range Coulomb interactions and very weak interlayer coupling, is used to calculate the order parameter Φ of underdoped cuprates. Model parameters are extracted from experimental superfluid densities and plasma frequencies. The temperature dependence Φ(T ) is characterized by a ’trapezoidal’ shape. At low temperatures, it declines slowly due to harm...