Designing Robust Quasi-2D Perovskites Thin Films for Stable Light-Emitting Applications.

Quasi-2D perovskite made with organic spacers co-crystallized with inorganic cesium lead bromide inorganics is demonstrated for near unity photoluminescence quantum yield at room temperature. However, light emitting diodes made with quasi-2D perovskites rapidly degrade which remains a major bottleneck in this field. In this work, It is shown that the bright emission originates from finely tuned multi-component 2D nano-crystalline phases that are thermodynamically unstable.

A Survey of Minimally Invasive Surfactant Use in the United States.

Objective:  Minimally invasive surfactant therapy (MIST) has become the standard of care in delivering surfactant noninvasively in many parts of the world, particularly throughout Europe; however, centers in the United States have been slower to adopt it. The most recent assessment of the use of MIST in the United States was in 2018 by Kurepa et al. Considering the increasing evidence favoring MIST, this paper reassessed the current rate of utilization and aims to examine barriers to MIST implementation.

Colloidal quantum dots enable tunable liquid-state lasers.

Present-day liquid-state lasers are based on organic dyes. Here we demonstrate an alternative class of liquid lasers that use solutions of colloidal quantum dots (QDs). Previous efforts to realize such devices have been hampered by the fast non-radiative Auger recombination of multicarrier states required for optical gain.

Relative muscular effort in the older adults during the sit-to-stand task: Monitoring neuromuscular reserve and movement limitations.

Background: Due to lower maximum strength, older adults purportedly need to exert greater muscular effort to stand up from a chair. This study investigated joint-specific muscular effort during a sit-to-stand by calculating relative-muscular-effort and investigating differences between healthy older and young adults.

Methods: Fifteen older (age: 69.

Latent allosteric control of protein interactions by ATP-competitive kinase inhibitors.

Protein kinase inhibitors designed to compete with ATP as a primary mode of action turn out to have considerable effects that go beyond their interference of nucleotide binding. New research shows how kinase activation and sometimes noncatalytic functions of protein kinases can be controlled by allosteric properties of kinase inhibitors, communicating perturbations from the active site to distal regulatory regions.