Results 51 to 60 of about 99,879 (261)

Cryo‐EM Analysis of a Tri‐Heme Cytochrome‐Associated RC‐LH1 Complex from the Marine Photoheterotrophic Bacterium Dinoroseobacter Shibae

Advanced Science, EarlyView.
Cryo‐EM reveals a closed 17‐subunit LH ring encircling the RC‐LH1 complex in Dinoroseobacter shibae, featuring a novel helix‐turn‐helix subunit bridging RC and LH. Mg2⁺/Ca2⁺ stabilizes the complex, while periplasmic Cyt c₂ mediates electron transfer via a tri‐heme Cyt to the special pair of bacteriochlorophylls. Insights into energy/electron efficiency
Weiwei Wang, Yanting Liu, Jiayi Gu, Shaoya An, Cheng Ma, Haichun Gao, Nianzhi Jiao, Jian‐Ren Shen, John Thomas Beatty, Michal Koblížek, Xing Zhang, Qiang Zheng, Jing‐Hua Chen   +12 more
wiley   +1 more source

Multivariate Covalent Organic Frameworks for High‐Performance Ammonia Nitrogen Separation: Structure‐Property‐Function Relationships

Advanced Science, EarlyView.
Theoretically, this study provides new insights into the atomic‐level adsorption mechanisms and structure‐property‐function relationships of sulfonated COFs for boosting ammonia nitrogen separation. Practically, the findings of this study can guide the design and optimization of COFs and other porous crystalline adsorbents to enhance the capture and ...
Yunhui Zhang, Jinglin Liu, Tao Wang, Kean Zhu, Yifan Gu, Zihao Wang, Meng Zhang, Zijian Xu, Zhenhua Chen, Haitao Li, Wei Jin   +10 more
wiley   +1 more source

Advances in Research on Uranium Isotope Fraction in Nature and Prospects

He huaxue yu fangshe huaxue, 2022
Uranium is the heaviest naturally occurring radioactive element in nature, and it is widely distributed in the earth’s crust. With the improvement of the technical accuracy of mass spectrometry to measure uranium isotope ratios, it is gradually ...
SONG Jing, TAN Kai-xuan, LIU Zhen-zhong, LI Chun-guang, LI Yong-mei, WENG Zong-xiang   +5 more
doaj   +1 more source

Establishment of rat model for aspiration pneumonia and potential mechanisms

Animal Models and Experimental Medicine, EarlyView.
Aspiration pneumonia was induced in Sprague Dawley rats by intratracheal instillation of hydrochloric acid (HCl, 1.5 μL/g.wt, pH = 1) followed by lipopolysaccharide (LPS, 20 μg/g.wt) after 1 h. The model reproduced hallmark features of acute lung injury, including histological lung damage, microvascular dysfunction, inflammation, hypoxemia, and ...
Hanbing Hu, Junfeng Chen, Yiru Shao, Yuedong Tang, Yu Dun, Obulkasim Memet, Xuanrong Bao, Jie Shen   +7 more
wiley   +1 more source

Release behavior of uranium from a uranium tailing in Jiangxi Province

Frontiers in Environmental Science, 2022
In this study, nine soils at different depths in a decommissioned uranium tailing pond in Jiangxi Province are selected as the research objects to study their mineralogical properties and reveal the leaching law of radioactive element uranium under ...
Shiqi Xue, Shiqi Xue, Zili Wang, Zili Wang, Jinbo Ouyang, Jinbo Ouyang, Limin Zhou, Limin Zhou, Zhirong Liu, Zhirong Liu   +9 more
doaj   +1 more source

An Improved YOLOv8 Network for Detecting Electric Pylons Based on Optical Satellite Image

Sensors
Electric pylons are crucial components of power infrastructure, requiring accurate detection and identification for effective monitoring of transmission lines. This paper proposes an innovative model, the EP-YOLOv8 network, which incorporates new modules:
Xin Chi, Yu Sun, Yingjun Zhao, Donghua Lu, Yan Gao, Yiting Zhang   +5 more
doaj   +1 more source

Magnetic Isotope Effect in the Uranium Isotopes Separation [PDF]

arXiv, 2018
When uranyl nitrate is photolysed in the water solution, light isotope ${}^{235}{\rm U}$ is separated from isotope ${}^{238}{\rm U}$ ; an enrichment factor $K = 1.04$ . The initial samples were depleted by a light isotope of uranium ${}^{235}{\rm U}$ (degree $\beta = 0.00455$). Regenerated uranyl nitrate was enriched by an isotope of uranium ${}^{235}{\
arxiv  

Comparative Analysis of Uranium Content and 235U Abundance in Uranium Dioxide Pellets

He huaxue yu fangshe huaxue
Non-destructive analysis(NDA) techniques can be used to ensure that no sensitive nuclear materials(SNM) are being lost or diverted from their defined flows and containments.
Sheng-kai XIE, Jing TAN, Ji-long ZHANG, Rui-rui ZHAO, Li LI, Rui-ping LIU, Jing CUI, Jian-yong CUI, Dong-fa GUO   +8 more
doaj   +1 more source

Issues of Improving Control and Increasing Efficiency of Production Blocks at an ISL Uranium Mine

Горные науки и технологии, 2020
The tasks of continuous optimizing production, looking for ways of increasing performance, cutting mining costs and expanding mineral resource base of a mining enterprise are becoming more relevant than ever in conditions of the current negative trends ...
D. R. Podrezov
doaj   +1 more source

Analysis of Heat Release Processes inside Storage Facilities Containing Irradiated Nuclear Graphite

Science and Technology of Nuclear Installations, 2022
The article is dedicated to the safety assessment of mixed storage of irradiated graphite and other types of radioactive waste accumulated during the operation of uranium-graphite reactors.
Alexander O. Pavliuk, Evgeniy V. Bespala, Sergey G. Kotlyarevskiy, Ivan Yu. Novoselov, Veleriy N. Kotov   +4 more
doaj   +1 more source