Bridging the Green Gap: Monochromatic InP-Based Quantum-Dot-on-Chip LEDs with over 50% Color Conversion Efficiency.

Solid-state light-emitting diodes (LEDs) emit nearly monochromatic light, yet seamless tuning of emission color throughout the visible region remains elusive. Color-converting powder phosphors are therefore used for making LEDs with a bespoke emission spectrum, yet broad emission lines and low absorption coefficients compromise the formation of small-footprint monochromatic LEDs. Color conversion by quantum dots (QDs) can address these issues, but high-performance monochromatic LEDs made using QDs free of restricted, hazardous elements remain to be demonstrated.

Alterations in Arginase-NO-synthase System of Spermatozoa in Human Subjects with Different Fertility Potential.

Background: Infertility is an important worldwide problem which affects 10-15% of couples globally. Altered NO production has also been implicated in the pathogenesis of the male infertility. The present study was designed to evaluate the changes in the activity of NO-synthase (NOS) and arginase in spermatozoa of patients with infertility.

[Mini-invasive operative interventions for spontaneous pneumothorax on the background of nonspecific pulmonary diseases].

The data, concerning the rate, causes and conditions of occurrence, localization of spontaneous pneumothorax, occurring on the background of non-specific pulmonary disease, tactic of its treatment, were adduced. The accent was done on the expediency of thoracoscopy performance for the correct diagnosis establishment as well as in the further tactic of treatment determination. The miniinvasive technologies introduction had permitted to improve the results of the patients treatment significantly and to prevent recurrence of spontaneous pneumothorax.

[Application of videolaparoscopic technology in traumatic hepatic injury].

Introduction of laparoscopic technology in surgery of the internal organs injuries promotes the efficacy raising in the specialized aid delivery as well as the postoperative complications rate reduction in the injured persons.