Anti-DPT monoclonal antibody Made to order

Silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET) can work at high switching frequency with low switching loss compared with Si insulated gate bipolar transistor (IGBT). Although Si IGBT and SiC MOSFET have the same MOS-gate structure, the transient characteristics and the gate driver requirements for Si IGBT and SiC MOSFET are different. In order to fully utilize the advantages of SiC MOSFET, the gate driver of SiC MOSFET needs to be optimized to meet some special driving requirements. The paper aims to analyze the characteristics for the new generation of wide band gap semiconductor device SiC MOSFET and proposes a novel gate driver for SiC MOSFET. Meanwhile, the driving protection circuit of SiC MOSFET is also investigated. The performances of the proposed gate driver have been experimentally evaluated by double pulse test (DPT). In addition, the effect of different external capacitors C-GS and external driving resistances R-G on the switch characteristics of SiC MOSFET is analyzed in detail.

Gibbs free energy profiles for the A-U reversible arrow A*-U* tautomeric equilibrium between the canonical and non-canonical base pair in aqueous solution have been obtained by applying Steered Molecular Dynamic (SMD) technique. Concerted and stepwise mechanisms have been considered to explain the double proton transfer process. Among the different mechanisms studied, the stepwise mechanism was the fastest due to the lower energy barrier (Delta G(double dagger) = 31.72 kcal. mol(-1)) respect to the concerted process, both having a reaction energy about 25 kcal . mol(-1). The inclusion of two water molecules to assist the transfer process slightly modified the reaction energy (Delta G = 28.09 kcal. mol(-1)), while increasing the barrier considerably (Delta G(double dagger) = 65.76 kcal. mol(-1)). From the results obtained, we can say that the A-U pair of bases presents a Gibbs free energy profile similar to the A-T pair and that it could participate in a process of spontaneous genetic mutation depending on the mechanism followed. Finally, the stationary points along the energy profile for all the mechanisms were analyzed at molecular dynamics levels, finding that the transition states have geometries very similar to those of the products. (C) 2018 Elsevier B.V. All rights reserved.