Results 71 to 80 of about 418,856 (380)

Lightning Initiation Processes Imaged With Very High Frequency Broadband Interferometry

Journal of Geophysical Research: Atmospheres, 2019
Recent measurements of narrow bipolar lightning events (NBEs) by very high frequency (VHF) radio interferometer have resolved the dynamic development of this special lightning process with submicrosecond time resolution, and showed that the fast positive
F. Lyu, S. Cummer, Zilong Qin, Ming-li Chen   +3 more
semanticscholar   +1 more source

Fibrates Inhibit PLTP‐induced M2 Macrophage Infiltration and Increase the Sensitivity of Hepatocellular Carcinoma to ICIs

Advanced Science, EarlyView.
Phospholipid transfer protein(PLTP) plays a critical role in forming a complex with kinase A (AURKA) and P65. This interaction facilitates phosphorylation of P65 at Ser536, leading to the activation of the NF‐κB signaling pathway. Ultimately, this leads to the upregulation of downstream cytokines, including IL‐6, IL‐8, and CSF‐1, which promotes M2 ...
Xinyue Liang, Yaning Li, Jianxun Cai, Lisi Luo, Pengfei Yang, Yutong Chen, Jiancong Zhou, Yan Zeng, Jiaping Yu, Weiyu Zhang, Wenzheng Pang, Yufang Li, Chunhua Wen, Jian Li, Linjuan Zeng   +14 more
wiley   +1 more source

Lactobacillus Salivarius‐Derived Indole‐3‐Acetic Acid Promotes AHR‐PARP1 Axis‐Mediated DNA Repair to Mitigate Intestinal Aging

Advanced Science, EarlyView.
Indole‐3‐acetic acid (IAA) acting as one of the aryl hydrocarbon receptor (AHR) endogenous ligands is identified to be derived from Lactobacillus salivarius via its catalytic enzyme (ALDH) rather than host cells. Lactobacillus salivarius and IAA supplementation effectively mitigate intestinal aging by facilitating AHR‐poly (ADP‐ribose) polymerase 1 ...
Zheng Cao, Cui Zhang, Hehua Lei, Weichuan Lin, Wenkai Yu, Xin Gao, Yanmeng He, Xinzhi Li, Qingwei Xiang, Zhiwen Zhang, Weifei Luo, Andrew D. Patterson, Limin Zhang, Gang Chen   +13 more
wiley   +1 more source

Observations of narrow bipolar events reveal how lightning is initiated in thunderstorms

Nature Communications, 2016
A long-standing but fundamental question in lightning studies concerns how lightning is initiated inside storms, given the absence of physical conductors.
W. Rison, P. Krehbiel, M. Stock, H. Edens, X. Shao, R. Thomas, M. Stanley, Yang Zhang   +7 more
semanticscholar   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Economic Viability of Photovoltaic Systems Providing Frequency Containment Reserve

Advanced Energy and Sustainability Research, EarlyView.
This article investigates the feasibility of photovoltaic (PV) systems providing frequency containment reserve (FCR) in the Netherlands. The economic analysis demonstrates that a PV plant can profitably participate in FCR without battery storage by maintaining an active power reserve.
Emil Petkovski, Mari S. Bogen, Theo Bosma, Marcel Eijgelaar   +3 more
wiley   +1 more source

A Novel Magnetic Integration High-Efficiency Converter with Low Ripple and High Dynamic Response for the Hybrid Power Supply Systems of All-Electric Aircraft

Aerospace
With the continuous improvement of battery energy density and converter power density, as well as the miniaturization and lightweighting of related airborne electrical equipment, all-electric aircraft with hybrid power supply systems provide more trade ...
Li Chen, Haifeng Gao, Fengjie Shen, Yiyi Zhang, Liangjie Qiu, Lei Wang   +5 more
doaj   +1 more source

Analysis of existing effectiveness and method to enhance the lightning, shielding and earthing protection schemes applied on the Parit Raja’s Telecommunication Tower System [PDF]

, 2013
Lightning, one of nature’s most destructive forces, continues to wreck havoc on lives and property especially in today’s electronic environment. It has been shown by field experiences that telecommunication towers are one of the preferential points
Mohd Kasim, Ct Valkyis
core  

A new population of terrestrial gamma-ray flashes in the RHESSI data [PDF]

, 2015
Terrestrial gamma-ray flashes (TGFs) are the most energetic photon phenomenon occurring naturally on Earth. An outstanding question is as follows: Are these flashes just a rare exotic phenomenon or are they an intrinsic part of lightning discharges and ...
Albrechtsen, K. H., Collier, A., Gjesteland, T., Østgaard, N.   +3 more
core   +4 more sources

Lightning is a major cause of large tree mortality in a lowland Neotropical forest.

New Phytologist, 2019
The mortality rates of large trees are critical to determining carbon stocks in tropical forests, but the mechanisms of tropical tree mortality remain poorly understood.
S. Yanoviak, Evan M. Gora, P. Bitzer, J. Burchfield, H. Muller‐Landau, M. Detto, S. Paton, S. Hubbell   +7 more
semanticscholar   +1 more source