AB STRACT The effects of external Zn+2 and other divalent cations on K channels in squid giant axons were studied. At low concentration (2 mM) Zn+2 slows opening kinetics without affecting closing kinetics . Higher concentrations (5-40 mM) progressively slow opening and speed channel closing to a lesser degree. In terms of "shifts," opening kinetics are strongly shifted to the right on the volt...

Manganese-catalyzed sequential C–H and C–C/C–Het bond activation to synthesize allylic alcohols, allylated arenes, functionalized cyclopentenes and skipped dienes is reported. This protocol can be readily scaled up and various coupling partners are applied in manganese catalysis for the first time. Moreover, manganese-catalyzed alkenyl C(sp)–H activation is also shown. Complimentary to the stan...

In this paper we report the observation of a natural generated internal particle transport barrier ( pITB ) in purely Ohmically heated plasmas in the HL-2A tokamak. The pITB have been observed when the line average electron density exceeds a threshold, which is nc=2.2×10m. The phenomenon is perfectly reproducible and identified by profile analysis, perturbative transport studies with Supersonic...

Bonding and antibonding states of artificial molecules have been realized in experiments by directly coupling two quantum dots. Without a direct coupling between two nearby quantum dots, here we show that under a very unusual condition (i.e., a large asymmetrical couplings to the leads at a large bias) continuous coherence control of double-dot charge states can be achieved by changing the flux...

This paper continues the analysis of a set of general relativistic 3D MHD simulations of accreting tori in the Kerr metric with different black hole spins. We focus on bound matter inside the initial pressure maximum, where the timeaveraged motion of gas is inward and an accretion disk forms. We use the flows of mass, angular momentum, and energy in order to understand dynamics in this region. ...

Extremely strong magnetic fields change the vacuum index of refraction. This induces a lensing effect that is not unlike the lensing phenomenon in strong gravitational fields. The main difference between the two is the polarization dependency of the magnetic lensing, a behaviour that induces a handful of interesting effects. The main prediction is that the thermal emission of neutron stars with...

[1] The inner radiation belt is thought to be quite stable, and only the most intense geomagnetic storms can cause energetic electron variations in the slot region and inner belt. In this paper, using energetic electron flux data from Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) satellite, we show that 100s keV electron flux enhancements in the slot regi...

one of the most important behavioral aspects in relationship among the main members of marketing channel is the issue of power and dependence that here we have looked through the source of power and countervailing power and we have considered reputation independence, sale and profits and marketing role dependence. in this research relationship between the two main marketing channel members in h...