We calculate current, spin current and tunnel magnetoresistance (TMR) for a quantum dot coupled to ferromagnetic leads in the presence of a square wave of bias voltage. Our results are obtained via time-dependent nonequilibrium Green function. Both parallel and antiparallel lead magnetization alignments are considered. The main findings include a wave of spin accumulation and spin current that ...

Total mixed rations (TMRs) seem to be the feeding method of choice, at least for nongrazing situations (Spain et al., 1993). Despite the need for an extra piece of equipment (maybe more), the benefits in animal performance have been shown to far outweigh the costs of implementing the concept. The principles of TMRs caught on a few decades ago, but developments in the implementation and preparat...

BACKGROUND AND PURPOSE CGP 12177 not only inhibits agonist effects mediated through the catecholamine site of the β1 -adrenoceptor with high affinity, but also exhibits agonist effects of its own at higher concentrations through a secondary, low-affinity β1 -adrenoceptor site or conformation. β-blocker affinities for this 'CGP 12177' site of the human β1 -adrenoceptor have thus far only been ch...

A new spintronic theory has been developed for the magnetic tunnel junction (MTJ) with single-crystal barrier. The barrier will be treated as a diffraction grating with intralayer periodicity, the diffracted waves of tunneling electrons thus contain strong coherence, both in charge and especially in spin. The theory can answer the two basic problems present in MgO-based MTJs: (1) Why does the t...

OBJECTIVE Using medicinal plant by-products (MPBP) as feed additives may be an eco-friendly option as substitutes for feedstuffs and may assist in reducing the improper disposal of MPBP. Therefore, this study was conducted to evaluate the influences of MPBP on the meat quality of Hanwoo steers fed a total mixed ration (TMR). METHODS Twenty seven steers (body weight = 573±57 kg) were randomly ...

Fluorescence recovery after photobleaching (FRAP) is a widely used imaging technique for measuring protein dynamics in live cells that has provided many important biological insights. Although FRAP presumes that the conversion of a fluorophore from a bright to a dark state is irreversible, GFP as well as other genetically encoded fluorescent proteins now in common use can also exhibit a reversi...

This article describes a fluorescence polarization (FP)-based protease assay on a microfluidic device that is compatible with fast and reproducible analyses of protease activities. The optical systems were arranged for simultaneously measuring fluorescence intensities of vertical and horizontal polarization planes, and the binding of tetramethylrhodamine (TMR) labeled-biotin with streptavidin w...

Duplex and Triple Modular Redundancy (TMR) systems are used when a high-level of reliability is desired. Real-Time Systems for autonomous critical missions need such degrees of reliability, but energy consumption becomes a dominant concern when these systems are built out of high-performance processors that consume a large budget of electrical power for operation and cooling. Examples where ene...

Myogenic stem cells and transmyocardial laser revascularization (TMR) have been used independently to treat patients with coronary heart disease. We assessed the hypothesis that implantation of autologous myogenic stem cells during TMR will augment ventricular function by new muscle formation and will improve perfusion by neovascularization. Thirty two mini-swine were subjected to myocardial is...