Optimization of Preparation Technology for PET-Based Carbon Dots by Response Surface Method and Its Application.

The preparation of polyethylene terephthalate(PET)-based Carbon Dots (PET-CDs) using one-step hydrothermal method with PET waste, pyromellitic acid (PMA) and ammonia (NH·HO) as precursors is a high-value utilization strategy for PET waste, offering significant application potential. To achieve efficient recycling of PET waste, response surface methodology was adopted for to optimize the precursor ratio during the synthesis of PET-CDs with fluorescence quantum yield (QY) as the key performance indicator. The optimal preparation conditions were determined to be: 1.

Compact LED projector design with high uniformity and efficiency.

The aim of this study is to design a compact LED projector that is divided into two systems: an illumination system and an imaging optical system. The illumination system consists of an RGB LED light source with a collimator lens group and a mirror with a color filter and a lens array integrator instead of an integrated rod so as to improve the uniformity of the light intensity. By using a new total internal reflection prism and projection lens, the whole optical engine is smaller in size and has a higher contrast ratio for image quality.

Protection of resveratrol and its analogues against ethanol-induced oxidative DNA damage in human peripheral lymphocytes.

Diseases related to ethanol abuse, especially binge drinking, are becoming one of the most costly health problems in the world. Ethanol-induced DNA damage plays a key role in the etiology of these diseases. New compounds are expected to offer new options against ethanol-induced genotoxicity.