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Inverse modeling of SO2 and NOx emissions over China using multisensor satellite data - Part 1: Formulation and sensitivity analysis 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (11) : 6631-6650
作者:  Wang, Yi;  Wang, Jun;  Xu, Xiaoguang;  Henze, Daven K.;  Qu, Zhen;  Yang, Kai
收藏  |  浏览/下载:11/0  |  提交时间:2020/06/09
Horizontal gene transfer of Fhb7 from fungus underlies Fusarium head blight resistance in wheat 期刊论文
Science, 2020
作者:  Hongwei Wang;  Silong Sun;  Wenyang Ge;  Lanfei Zhao;  Bingqian Hou;  Kai Wang;  Zhongfan Lyu;  Liyang Chen;  Shoushen Xu;  Jun Guo;  Min Li;  Peisen Su;  Xuefeng Li;  Guiping Wang;  Cunyao Bo;  Xiaojian Fang;  Wenwen Zhuang;  Xinxin Cheng;  Jianwen Wu;  Luhao Dong;  Wuying Chen;  Wen Li;  Guilian Xiao;  Jinxiao Zhao;  Yongchao Hao;  Ying Xu;  Yu Gao;  Wenjing Liu;  Yanhe Liu;  Huayan Yin;  Jiazhu Li;  Xiang Li;  Yan Zhao;  Xiaoqian Wang;  Fei Ni;  Xin Ma;  Anfei Li;  Steven S. Xu;  Guihua Bai;  Eviatar Nevo;  Caixia Gao;  Herbert Ohm;  Lingrang Kong
收藏  |  浏览/下载:16/0  |  提交时间:2020/05/25
High-spatiotemporal-resolution mapping of global urban change from 1985 to 2015 期刊论文
NATURE SUSTAINABILITY, 2020, 3 (7) : 564-+
作者:  Liu, Xiaoping;  Huang, Yinghuai;  Xu, Xiaocong;  Li, Xuecao;  Li, Xia;  Ciais, Philippe;  Lin, Peirong;  Gong, Kai;  Ziegler, Alan D.;  Chen, Anping;  Gong, Peng;  Chen, Jun;  Hu, Guohua;  Chen, Yimin;  Wang, Shaojian;  Wu, Qiusheng;  Huang, Kangning;  Estes, Lyndon;  Zeng, Zhenzhong
收藏  |  浏览/下载:17/0  |  提交时间:2020/05/13
Recycling and metabolic flexibility dictate life in the lower oceanic crust 期刊论文
NATURE, 2020, 579 (7798) : 250-+
作者:  Zhou, Peng;  Yang, Xing-Lou;  Wang, Xian-Guang;  Hu, Ben;  Zhang, Lei;  Zhang, Wei;  Si, Hao-Rui;  Zhu, Yan;  Li, Bei;  Huang, Chao-Lin;  Chen, Hui-Dong;  Chen, Jing;  Luo, Yun;  Guo, Hua;  Jiang, Ren-Di;  Liu, Mei-Qin;  Chen, Ying;  Shen, Xu-Rui;  Wang, Xi;  Zheng, Xiao-Shuang;  Zhao, Kai;  Chen, Quan-Jiao;  Deng, Fei;  Liu, Lin-Lin;  Yan, Bing;  Zhan, Fa-Xian;  Wang, Yan-Yi;  Xiao, Geng-Fu;  Shi, Zheng-Li
收藏  |  浏览/下载:37/0  |  提交时间:2020/05/13

The lithified lower oceanic crust is one of Earth'  s last biological frontiers as it is difficult to access. It is challenging for microbiota that live in marine subsurface sediments or igneous basement to obtain sufficient carbon resources and energy to support growth(1-3) or to meet basal power requirements(4) during periods of resource scarcity. Here we show how limited and unpredictable sources of carbon and energy dictate survival strategies used by low-biomass microbial communities that live 10-750 m below the seafloor at Atlantis Bank, Indian Ocean, where Earth'  s lower crust is exposed at the seafloor. Assays of enzyme activities, lipid biomarkers, marker genes and microscopy indicate heterogeneously distributed and viable biomass with ultralow cell densities (fewer than 2,000 cells per cm(3)). Expression of genes involved in unexpected heterotrophic processes includes those with a role in the degradation of polyaromatic hydrocarbons, use of polyhydroxyalkanoates as carbon-storage molecules and recycling of amino acids to produce compounds that can participate in redox reactions and energy production. Our study provides insights into how microorganisms in the plutonic crust are able to survive within fractures or porous substrates by coupling sources of energy to organic and inorganic carbon resources that are probably delivered through the circulation of subseafloor fluids or seawater.


  
DNA-loop extruding condensin complexes can traverse one another 期刊论文
NATURE, 2020
作者:  Li, Xun;  Zhang, Fei;  He, Haiying;  Berry, Joseph J.;  Zhu, Kai;  Xu, Tao
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/03

Condensin, a key component of the structure maintenance of chromosome (SMC) protein complexes, has recently been shown to be a motor that extrudes loops of DNA(1). It remains unclear, however, how condensin complexes work together to collectively package DNA into chromosomes. Here we use time-lapse single-molecule visualization to study mutual interactions between two DNA-loop-extruding yeast condensins. We find that these motor proteins, which, individually, extrude DNA in one direction only are able to dynamically change each other'  s DNA loop sizes, even when far apart. When they are in close proximity, condensin complexes are able to traverse each other and form a loop structure, which we term a Z-loop-three double-stranded DNA helices aligned in parallel with one condensin at each edge. Z-loops can fill gaps left by single loops and can form symmetric dimer motors that pull in DNA from both sides. These findings indicate that condensin may achieve chromosomal compaction using a variety of looping structures.


Single-molecule visualization shows that condensin-a motor protein that extrudes DNA in one direction only-can encounter and pass a second condensin molecule to form a new type of DNA loop that gathers DNA from both sides.