Results 81 to 90 of about 15,620 (184)

Intergenerational Transmission of Metabolic Changes in Oocytes From Aged Mice

Aging Cell, Volume 25, Issue 3, March 2026.
This study shows that oxidative changes in oocytes from aged female mice lead to lipid droplet accumulation and altered energy and retinoid metabolism. These changes persist in embryonic organs, triggering antioxidant responses in lipid‐rich tissues. Remarkably, altered profiles are transmitted across generations, reaching third generation, suggesting ...
Hafsa Gulzar, Richard Musson, Simona Bisogno, Lulu Alluhaibi, Alexey Maximenko, Ewelina Bik, Małgorzata Barańska, Joanna Depciuch, Grażyna E. Ptak   +8 more
wiley   +1 more source

Incidence and Risk Factors of Limb Ischaemia in Adult Patients Receiving Veno‐Arterial Extracorporeal Membrane Oxygenation: A Systematic Review and Meta‐Analysis

Nursing in Critical Care, Volume 31, Issue 2, March 2026.
ABSTRACT Background Limb ischaemia is a serious and potentially limb‐threatening vascular complication associated with veno‐arterial extracorporeal membrane oxygenation (V‐A ECMO). However, substantial heterogeneity has been observed in the reported incidence rates and identified risk factors among published studies.
Meiqian Guo, Mengyao Ji, Jiayuan Qu, Chuanxiang Yuan, Peixi Wang   +4 more
wiley   +1 more source

A new class of hybrid AC/AC direct power converters [PDF]

, 2005
Variable voltage and variable frequency conversion of electrical energy from an AC source to an AC load is done in traditional power converters via a DC-link where an energy storage element (electrolytic capacitors) is situated.
Klumpner, Christian, Wheeler, Patrick, Wijekoon, Thiwanka   +2 more
core   +1 more source

Small understory trees increase growth following sustained drought in the Amazon

New Phytologist, Volume 249, Issue 6, Page 2787-2799, March 2026.
Summary Droughts pose a major threat to the Amazon rainforest, yet the mechanisms enabling trees to maintain growth under prolonged drought remain poorly understood, particularly in the understory layer. We leveraged a 22‐yr Throughfall Exclusion (TFE) in a 1‐ha plot in eastern Amazonia, paired with a Control plot, to test whether small understory ...
Mateus C. Silva, David C. Bartholomew, André L. Giles, Paulo R. L. Bittencourt, Pablo Sanchez‐Martinez, Lion R. Martius, Vanessa N. Rodrigues, Rachel Selman, João P. Reis, Grazielle S. Teodoro, Rafael S. Oliveira, Oliver Binks, Maurizio Mencuccini, João A. Silva Junior, Antonio C. L. da Costa, Patrick Meir, Lucy Rowland   +16 more
wiley   +1 more source

Atomic‐Scale Mechanisms of Multi‐Resistance States in HfOx‐Based RRAM: Evolution of Atomic Electric Fields and Oxygen Vacancies

Advanced Science, Volume 13, Issue 10, 18 February 2026.
Atomic‐scale mechanisms governing multilevel resistive switching in HfOx‐based RRAM are reveal through advanced TEM. Thermally driven m‐phase rotation ([101]↔[011]) enables selective oxygen vacancy migration, which reconstructs atomic electric fields and dictates conduction—from Schottky/Poole‐Frenkel emission to Ohmic transport.
Wen Sun, Yuyan Wang, Ruofei Hu, Yuyao Lu, Jun Xu, Xinyi Li, Bin Gao, He Qian, Jianshi Tang, Huaqiang Wu   +9 more
wiley   +1 more source

Three-level NPC voltage source converter based direct power control of the doubly fed induction generator at low constant switching frequency

Revue des Énergies Renouvelables, 2013
This paper deals with an improvement of the direct power control ‘DPC’ for three-level voltage source inverter NPC-VSI feeds the rotor of the doubly fed induction generator ‘DFIG’ based wind power generation system.
Y. Djeriri, A. Meroufel, B. Belabbes, A. Massoum   +3 more
doaj  

A Novel Point of Common Coupling Direct Power Control Method for Grid Integration of Renewable Energy Sources: Performance Evaluation among Power Quality Phenomena

Energies
Robust control mechanisms are needed in microgrids to ensure voltage source inverters (VSIs) effectively integrate renewable energy sources such as solar photovoltaic (PV) systems into the power network.
Yusuf A. Alturki, Abdullah Ali Alhussainy, Sultan M. Alghamdi, Muhyaddin Rawa   +3 more
doaj   +1 more source

Study on a new kind of control method of single-phase rectifiers

Dianzi Jishu Yingyong, 2018
According to these drawbacks of traditional direct power control(DPC) in single-phase PWM rectifiers such as slow dynamic response,poor anti-interference ability and variable switching frequency, an algorithm based on outer loop adopting the feedback of ...
Hu Xiaoxue, Wang Haibin, Guo Xiaoying, Zhang Yufeng, Liu Zhonghao, Cao Taiqiang   +5 more
doaj   +1 more source

Spatial and temporal patterns of distribution of the gap junction protein connexin43 during mouse gastrulation and organogenesis [PDF]

, 1992
Connexin43 (Cx43) is a member of the family of channel-forming proteins that make up the gap junction and are believed to provide pathways for cell-cell exchange of developmental signals.
Biswal, Sandip, Revel, Jean-Paul, Yancey, S. Barbara   +2 more
core  

Adaptive-Gain Second-Order Sliding Mode Direct Power Control for Wind-Turbine-Driven DFIG under Balanced and Unbalanced Grid Voltage

Energies, 2019
In a wind turbine system, a doubly-fed induction generator (DFIG), with nonlinear and high-dimensional dynamics, is generally subjected to unbalanced grid voltage and unknown uncertainty.
Yaozhen Han, Ronglin Ma
doaj   +1 more source