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Progressive nitrogen limitation across the Tibetan alpine permafrost region 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Kou, Dan;  Yang, Guibiao;  Li, Fei;  Feng, Xuehui;  Zhang, Dianye;  Mao, Chao;  Zhang, Qiwen;  Peng, Yunfeng;  Ji, Chengjun;  Zhu, Qiuan;  Fang, Yunting;  Liu, Xueyan;  Xu-Ri;  Li, Siqi;  Deng, Jia;  Zheng, Xunhua;  Fang, Jingyun;  Yang, Yuanhe
收藏  |  浏览/下载:18/0  |  提交时间:2020/07/06
An Improved Optimization Scheme for Representing Hillslopes and Depressions in Karst Hydrology 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (5)
作者:  Xu, Chaohao;  Xu, Xianli;  Liu, Meixian;  Li, Zhenwei;  Zhang, Yaohua;  Zhu, Jingxuan;  Wang, Kelin;  Chen, Xi;  Zhang, Zhicai;  Peng, Tao
收藏  |  浏览/下载:30/0  |  提交时间:2020/07/02
VarKarst  hydrological model  hillslopes and depressions  karst ecosystems  Earth'  s critical zone  ecohydrology  
Ozone pollution over China and India: seasonality and sources 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (7) : 4399-4414
作者:  Gao, Meng;  Gao, Jinhui;  Zhu, Bin;  Kumar, Rajesh;  Lu, Xiao;  Song, Shaojie;  Zhang, Yuzhong;  Jia, Beixi;  Wang, Peng;  Beig, Gufran;  Hu, Jianlin;  Ying, Qi;  Zhang, Hongliang;  Sherman, Peter;  McElroy, Michael B.
收藏  |  浏览/下载:12/0  |  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.


  
Improved protein structure prediction using potentials from deep learning 期刊论文
NATURE, 2020, 577 (7792) : 706-+
作者:  Ma, Runze;  Cao, Duanyun;  Zhu, Chongqin;  Tian, Ye;  Peng, Jinbo;  Guo, Jing;  Chen, Ji;  Li, Xin-Zheng;  Francisco, Joseph S.;  Zeng, Xiao Cheng;  Xu, Li-Mei;  Wang, En-Ge;  Jiang, Ying
收藏  |  浏览/下载:142/0  |  提交时间:2020/07/03

Protein structure prediction can be used to determine the three-dimensional shape of a protein from its amino acid sequence(1). This problem is of fundamental importance as the structure of a protein largely determines its function(2)  however, protein structures can be difficult to determine experimentally. Considerable progress has recently been made by leveraging genetic information. It is possible to infer which amino acid residues are in contact by analysing covariation in homologous sequences, which aids in the prediction of protein structures(3). Here we show that we can train a neural network to make accurate predictions of the distances between pairs of residues, which convey more information about the structure than contact predictions. Using this information, we construct a potential of mean force(4) that can accurately describe the shape of a protein. We find that the resulting potential can be optimized by a simple gradient descent algorithm to generate structures without complex sampling procedures. The resulting system, named AlphaFold, achieves high accuracy, even for sequences with fewer homologous sequences. In the recent Critical Assessment of Protein Structure Prediction(5) (CASP13)-a blind assessment of the state of the field-AlphaFold created high-accuracy structures (with template modelling (TM) scores(6) of 0.7 or higher) for 24 out of 43 free modelling domains, whereas the next best method, which used sampling and contact information, achieved such accuracy for only 14 out of 43 domains. AlphaFold represents a considerable advance in protein-structure prediction. We expect this increased accuracy to enable insights into the function and malfunction of proteins, especially in cases for which no structures for homologous proteins have been experimentally determined(7).


  
Effects of natural gas acidic components on local porosity generation in a carbonate reservoir: Insights from reactive transport modeling 期刊论文
AAPG BULLETIN, 2019, 103 (12) : 2975-3001
作者:  Zhang, Guanru;  Lu, Peng;  Luo, Pan;  Sonnenthal, Eric;  Huang, Yi;  Zhu, Chen
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
Assessment of ECMWF reanalysis data in complex terrain: Can the CERA-20C and ERA-Interim data sets replicate the variation in surface air temperatures over Sichuan, China? 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019, 39 (15) : 5619-5634
作者:  Luo, Haolin;  Ge, Fei;  Yang, Kangquan;  Zhu, Shoupeng;  Peng, Ting;  Cai, Wenyue;  Liu, Xiaoran;  Tang, Weiwei
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
ECMWF reanalysis  observational data analysis  Sichuan  surface air temperature  
Topographic Evolution of Von Karman Crater Revealed by the Lunar Rover Yutu-2 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (22) : 12764-12770
作者:  Di, Kaichang;  Zhu, Meng-Hua;  Yue, Zongyu;  Lin, Yangting;  Wan, Wenhui;  Liu, Zhaoqin;  Gou, Sheng;  Liu, Bin;  Peng, Man;  Wang, Yexin;  Niu, Shengli;  Zhang, Jinhai;  Li, Jian;  Xie, Jianfeng;  Xi, Luhua;  Yang, Jianfeng;  Xue, Bin
收藏  |  浏览/下载:8/0  |  提交时间:2020/02/17
Von Karman crater  Yutu-2 Rover  Topographic  
Summer albedo variations in the Arctic Sea ice region from 1982 to 2015 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Peng, Hai-Tao;  Ke, Chang-Qing;  Shen, Xiaoyi;  Li, Mengmeng;  Shao, Zhu-De
收藏  |  浏览/下载:11/0  |  提交时间:2020/02/17
albedo  Arctic Sea ice region  Central Arctic Index  near-surface air temperature  sea ice concentration  trend  
Chemical characteristics of atmospheric carbonyl compounds and source identification of formaldehyde in Wuhan, Central China 期刊论文
ATMOSPHERIC RESEARCH, 2019, 228: 95-106
作者:  Yang, Z.;  Cheng, H. R.;  Wang, Z. W.;  Peng, J.;  Zhu, J. X.;  Lyu, X. P.;  Guo, H.
收藏  |  浏览/下载:16/0  |  提交时间:2019/11/27
Carbonyls compounds  Diurnal variation  Seasonal variation  Source identification