Mitochondria-targeting potassium sensors and method(s) for making such sensors. The sensor shows a response to potassium and displays a 130-fold dynamic range of fluorescence intensity and high brightness. The sensors response to potassium concentrations was demonstrated to be unaffected by cellular pH value and/or concentrations of other ions. The sensors can be used for monitoring the mitochondrial potassium efflux/influx.

Mitochondria-targeting potassium sensors and method(s) for making such sensors. The sensor shows a response to potassium and displays a 130-fold dynamic range of fluorescence intensity and high brightness. The sensors response to potassium concentrations was demonstrated to be unaffected by cellular pH value and/or concentrations of other ions. The sensors can be used for monitoring the mitochondrial potassium efflux/influx.

The present disclosure relates to a semiconductor photoresist composition including an organometallic compound represented by Chemical Formula 1 and a solvent, and a method of forming patterns by using the semiconductor photoresist composition.

The present disclosure relates to a semiconductor photoresist composition including an organometallic compound represented by Chemical Formula 1 and a solvent, and a method of forming patterns by using the semiconductor photoresist composition.

A heterocyclic compound represented by the following Formula 1 and an organic electroluminescence device including the same are provided.

##STR00001##

In Formula 1, X.sub.1 and X.sub.2 are each independently represented by any one of the following Formulae 2 to 4:

##STR00002##

A heterocyclic compound represented by the following Formula 1 and an organic electroluminescence device including the same are provided.

##STR00001##

In Formula 1, X.sub.1 and X.sub.2 are each independently represented by any one of the following Formulae 2 to 4:

##STR00002##

An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer. The emission layer includes at least one heterocyclic compound of Formula 1. The heterocyclic compound may be a host or a delayed fluorescent dopant. The organic light-emitting device including the heterocyclic compound may have a low driving voltage, high efficiency, high luminance, and a long lifespan.

An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer. The emission layer includes at least one heterocyclic compound of Formula 1. The heterocyclic compound may be a host or a delayed fluorescent dopant. The organic light-emitting device including the heterocyclic compound may have a low driving voltage, high efficiency, high luminance, and a long lifespan.

Described herein are certain boron-containing compounds, compositions, preparations and their use as modulators of the transpeptidase function of bacterial penicillin-binding proteins and as antibacterial agents. In some embodiments, the compounds described herein inhibit penicillin-binding proteins. In certain embodiments, the compounds described herein are useful in the treatment of bacterial infections.

Described herein are certain boron-containing compounds, compositions, preparations and their use as modulators of the transpeptidase function of bacterial penicillin-binding proteins and as antibacterial agents. In some embodiments, the compounds described herein inhibit penicillin-binding proteins. In certain embodiments, the compounds described herein are useful in the treatment of bacterial infections.