Knock-in Rabbit Model of Long QT Syndrome Type-2, Epilepsy, and Sudden Death.

Background: Long QT Syndrome Type-2 (LQT2) is due to loss-of-function variants. encodes K 11.1 that forms a delayed-rectifier potassium channel in the brain and heart.

Scenarios, not shortage forecasts, are key to better workforce policy.

Current and projected shortages in the US health workforce have prompted policymakers to propose reforms to Medicare Graduate Medical Education (GME) and nursing programs. However, researchers have historically faced challenges in accurately predicting workforce trends; physician and nurse supply and demand all grew faster than expected over the past 2 decades. These discrepancies highlight the need for scenario-based workforce planning and projection models that estimate how a policy intervention would affect the workforce outcome of interest.

Thermal Rates and High-Temperature Tunneling from Surface Reaction Dynamics and First-Principles.

Studying dynamics of the dissociative adsorption and recombinative desorption of hydrogen on copper surfaces has shaped our atomic-scale understanding of surface chemistry, yet experimentally determining the thermal rates for these processes, which dictate the outcome of catalytic reactions, has been impossible so far. In this work, we determine the thermal rate constants for dissociative adsorption and recombinative desorption of hydrogen on Cu(111) between 200 and 1000 K using data from reaction dynamics experiments. Contrary to current understanding, our findings demonstrate the predominant role of quantum tunneling, even at temperatures as high as 400 K.

Cooperative adsorbate binding catalyzes high-temperature hydrogen oxidation on palladium.

Atomic-scale structures that account for the acceleration of reactivity by heterogeneous catalysts often form only under reaction conditions of high temperatures and pressures, making them impossible to observe with low-temperature, ultra-high-vacuum methods. We present velocity-resolved kinetics measurements for catalytic hydrogen oxidation on palladium over a wide range of surface concentrations and at high temperatures. The rates exhibit a complex dependence on oxygen coverage and step density, which can be quantitatively explained by a density functional and transition-state theory-based kinetic model involving a cooperatively stabilized configuration of at least three oxygen atoms at steps.