Suppression of apoptosis is an important feature of the Abelson murine leukemia virus (Ab-MLV) transformation process. During multistep transformation, Ab-MLV-infected pre-B cells undergo p53-dependent apoptosis during the crisis phase of transformation. Even once cells are fully transformed, an active v-Abl protein tyrosine kinase is required to suppress apoptosis because cells transformed by ...

BACKGROUND Because protons in fat do not exhibit a temperature-dependent frequency shift, proton resonance frequency shift (PRFS)-based MR thermometry always suffers from disturbances due to the presence of fats or lipids. OBJECTIVE A new fat suppression method for PRFS-based MR thermometry is proposed to obtain accurate variation of phase angle. METHODS Similar to the approach of separatin...

X-ray observations of hot gas in galaxy clusters often show steeper temperature gradients across cold fronts – contact discontinuities, driven by the differential gas motions. These sharp (few kpc wide) surface brightness/temperature discontinuities would be quickly smeared out by the electron thermal conduction in unmagnetized plasma, suggesting significant suppression of the heat flow across ...

We investigated the effects of isolation, huddling, and air temperature on ultrasound production by rat pups. Experiment 1 showed that ultrasound production by 8- to 9-day-olds was minimal at thermoneutrality and increased in response to small deviations of air temperature on either side of the thermoneutral zone. Experiments 2 and 3 showed that suppression of ultrasound production by contact w...

it has been recognized that acute and chronic stress has an impact on the immune system. acute stress may have a stimulating effect on the immune system, while in the case of chronic stress specially depression, the immune system could be down-regulated. however, an association between depression and a higher number of circulating white blood cells with increased activity has been reported. ele...

By doing magnetization measurements during magnetic field sweeping on thin films of the new superconductor MgB2, it is found that in low temperature and low field region many small flux jumps are taking place. This effect strongly suppresses the central magnetization peak leading to an reduced nominal superconducting critical current density at low temperatures. A borderline for this effect to ...

Based on the analysis of the mechanism and hazards of asphalt fume, by adding two fume suppressant Mg(OH)2 and Al(OH)3 and two viscosity reducers Sasobit and ROADBIT-BPL, the paper optimized the mixture ratio for road use, and prepared the environment-friendly fume-suppression asphalt, and then conducted the performance tests to identify the optimum dosage. The results show that: the fume amoun...

A parameterization was developed for the heterogeneous reaction probability (γ ) of N2O5 as a function of temperature, relative humidity (RH), particle composition, and phase state, for use in advanced air quality models. The reaction probabilities on aqueous NH4HSO4, (NH4)2SO4, and NH4NO3 were modeled statistically using data and uncertainty values compiled from seven different laboratory stud...

In the simplest type-I seesaw leptogenesis scenario right-handed neutrino annihilation processes are absent. However, in the presence of new interactions these processes are possible and can affect the resulting B − L asymmetry in an important way. A prominent example is provided by models with spontaneous lepton number violation, where the existence of new dynamical degrees of freedom can play...

We study the Coulomb blockade of tunneling through a double quantum dot. The temperature dependence of the linear conductance is strongly affected by the interdot tunneling. As the tunneling grows, a crossover from temperature-independent peak conductance to a power-law suppression of conductance at low temperatures is predicted. This suppression is a manifestation of the Anderson orthogonality...