Abstract: This paper describes a theory to synthesize nonisolated dc-dc converters. It uses the fundamental flux balance equation across the inductors of a converter as a starting point in this ...

The topic was vibration—the unseen forces going to town inside any engine spinning deep into the rpm stratosphere, and the devices designed to keep those forces in check. First, it’s a damper ...

Hydrothermal experiments were conducted to evaluate the kinetics of H-2(aq) oxidation in the homogeneous H-2-O-2-H2O system at conditions reflecting subsurface/near-seafloor hydrothermal environments ...

研究人员通过构建p型聚吡咯衍生碳(PPy-800)与n型g-C3N4纳米片(CNm)的范德华异质结，成功实现双位点O2吸附调控，显著提升2e?ORR路径的光催化H2O2产率至10415.27 μmol g?1 h?1，并展现1.31%的太阳能转化效率，为金属-free催化剂设计提供新思路。 这项突破性研究揭示了如何 ...

本研究揭示了活性氧物种(ROS)在美洲黑杨木质部发育中的关键作用。研究人员通过对比分析速生型(Wimco-109)和慢生型(Wimco-83)克隆株系发现，超氧阴离子(O2??)促进生长而H2O2导致木质化增强。研究证实NADPH氧化酶(NOX)活性差异调控ROS平衡，为造纸工业选育低木质素材料 ...

BLOOMFIELD HILLS, Mich., July 29, 2025--(BUSINESS WIRE)--O2 Investment Partners (www.o2investment.com) is excited to announce the promotions of Jimmy Frye to Partner, Charles Miller to Principal, and ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Developing a quantitative understanding of wave plasma processes in the lower ionosphere requires a reasonably accurate theoretical description of the underlying physical processes. For such a highly ...