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Contrasting sources and processes of particulate species in haze days with low and high relative humidity in wintertime Beijing 期刊论文
Atmospheric Chemistry and Physics, 2020
作者:  Ru-Jin Huang, Yao He, Jing Duan, Yongjie Li, Qi Chen, Yan Zheng, Yang Chen, Weiwei Hu, Chunshui Lin, Haiyan Ni, Wenting Dai, Junji Cao, Yunfei Wu, Renjian Zhang, Wei Xu, Jurgita Ovadnevaite, Darius Ceburnis, Thorsten Hoffmann, and Colin D. O'Dowd
收藏  |  浏览/下载:13/0  |  提交时间:2020/08/09
Chesapeake Bay acidification buffered by spatially decoupled carbonate mineral cycling 期刊论文
NATURE GEOSCIENCE, 2020, 13 (6) : 441-+
作者:  Su, Jianzhong;  Cai, Wei-Jun;  Brodeur, Jean;  Chen, Baoshan;  Hussain, Najid;  Yao, Yichen;  Ni, Chaoying;  Testa, Jeremy M.;  Li, Ming;  Xie, Xiaohui;  Ni, Wenfei;  Scaboo, K. Michael;  Xu, Yuan-yuan;  Cornwell, Jeffrey;  Gurbisz, Cassie;  Owens, Michael S.;  Waldbusser, George G.;  Dai, Minhan;  Kemp, W. Michael
收藏  |  浏览/下载:9/0  |  提交时间:2020/06/09
DNA-repair enzyme turns to translation 期刊论文
NATURE, 2020, 579 (7798) : 198-199
作者:  Bian, Zhilei;  Gong, Yandong;  Huang, Tao;  Lee, Christopher Z. W.;  Bian, Lihong;  Bai, Zhijie;  Shi, Hui;  Zeng, Yang;  Liu, Chen;  He, Jian;  Zhou, Jie;  Li, Xianlong;  Li, Zongcheng;  Ni, Yanli;  Ma, Chunyu;  Cui, Lei;  Zhang, Rui;  Chan, Jerry K. Y.;  Ng, Lai Guan;  Lan, Yu;  Ginhoux, Florent;  Liu, Bing
收藏  |  浏览/下载:13/0  |  提交时间:2020/07/03

A key DNA-repair enzyme has a surprising role during the early steps in the assembly of ribosomes - the molecular machines that translate the genetic code into protein.


  
Millennial-scale hydroclimate control of tropical soil carbon storage 期刊论文
NATURE, 2020, 581 (7806) : 63-+
作者:  Lam, Tommy Tsan-Yuk;  Jia, Na;  Zhang, Ya-Wei;  Shum, Marcus Ho-Hin;  Jiang, Jia-Fu;  Zhu, Hua-Chen;  Tong, Yi-Gang;  Shi, Yong-Xia;  Ni, Xue-Bing;  Liao, Yun-Shi;  Li, Wen-Juan;  Jiang, Bao-Gui;  Wei, Wei;  Yuan, Ting-Ting;  Zheng, Kui;  Cui, Xiao-Ming;  Li, Jie;  Pei, Guang-Qian
收藏  |  浏览/下载:25/0  |  提交时间:2020/05/13

Over the past 18,000 years, the residence time and amount of soil carbon stored in the Ganges-Brahmaputra basin have been controlled by the intensity of Indian Summer Monsoon rainfall, with greater carbon destabilization during wetter, warmer conditions.


The storage of organic carbon in the terrestrial biosphere directly affects atmospheric concentrations of carbon dioxide over a wide range of timescales. Within the terrestrial biosphere, the magnitude of carbon storage can vary in response to environmental perturbations such as changing temperature or hydroclimate(1), potentially generating feedback on the atmospheric inventory of carbon dioxide. Although temperature controls the storage of soil organic carbon at mid and high latitudes(2,3), hydroclimate may be the dominant driver of soil carbon persistence in the tropics(4,5)  however, the sensitivity of tropical soil carbon turnover to large-scale hydroclimate variability remains poorly understood. Here we show that changes in Indian Summer Monsoon rainfall have controlled the residence time of soil carbon in the Ganges-Brahmaputra basin over the past 18,000 years. Comparison of radiocarbon ages of bulk organic carbon and terrestrial higher-plant biomarkers with co-located palaeohydrological records(6) reveals a negative relationship between monsoon rainfall and soil organic carbon stocks on a millennial timescale. Across the deglaciation period, a depletion of basin-wide soil carbon stocks was triggered by increasing rainfall and associated enhanced soil respiration rates. Our results suggest that future hydroclimate changes in tropical regions are likely to accelerate soil carbon destabilization, further increasing atmospheric carbon dioxide concentrations.


  
Injured adult neurons regress to an embryonic transcriptional growth state 期刊论文
NATURE, 2020, 581 (7806) : 77-+
作者:  Wang, Ruicong;  Li, Hongda;  Wu, Jianfeng;  Cai, Zhi-Yu;  Li, Baizhou;  Ni, Hengxiao;  Qiu, Xingfeng;  Chen, Hui;  Liu, Wei;  Yang, Zhang-Hua;  Liu, Min;  Hu, Jin;  Liang, Yaoji;  Lan, Ping;  Han, Jiahuai;  Mo, Wei
收藏  |  浏览/下载:22/0  |  提交时间:2020/07/03

Grafts of spinal-cord-derived neural progenitor cells (NPCs) enable the robust regeneration of corticospinal axons and restore forelimb function after spinal cord injury(1)  however, the molecular mechanisms that underlie this regeneration are unknown. Here we perform translational profiling specifically of corticospinal tract (CST) motor neurons in mice, to identify their '  regenerative transcriptome'  after spinal cord injury and NPC grafting. Notably, both injury alone and injury combined with NPC grafts elicit virtually identical early transcriptomic responses in host CST neurons. However, in mice with injury alone this regenerative transcriptome is downregulated after two weeks, whereas in NPC-grafted mice this transcriptome is sustained. The regenerative transcriptome represents a reversion to an embryonic transcriptional state of the CST neuron. The huntingtin gene (Htt) is a central hub in the regeneration transcriptome  deletion of Htt significantly attenuates regeneration, which shows that Htt has a key role in neural plasticity after injury.


In mouse models of central nervous system injury, Htt is shown to be a key component of the regulatory program associated with reversion of the neuronal transcriptome to a less-mature state.


  
The gut-brain axis mediates sugar preference 期刊论文
NATURE, 2020, 580 (7804) : 511-+
作者:  Wang, Ruicong;  Li, Hongda;  Wu, Jianfeng;  Cai, Zhi-Yu;  Li, Baizhou;  Ni, Hengxiao;  Qiu, Xingfeng;  Chen, Hui;  Liu, Wei;  Yang, Zhang-Hua;  Liu, Min;  Hu, Jin;  Liang, Yaoji;  Lan, Ping;  Han, Jiahuai;  Mo, Wei
收藏  |  浏览/下载:16/0  |  提交时间:2020/07/03

The taste of sugar is one of the most basic sensory percepts for humans and other animals. Animals can develop a strong preference for sugar even if they lack sweet taste receptors, indicating a mechanism independent of taste(1-3). Here we examined the neural basis for sugar preference and demonstrate that a population of neurons in the vagal ganglia and brainstem are activated via the gut-brain axis to create preference for sugar. These neurons are stimulated in response to sugar but not artificial sweeteners, and are activated by direct delivery of sugar to the gut. Using functional imaging we monitored activity of the gut-brain axis, and identified the vagal neurons activated by intestinal delivery of glucose. Next, we engineered mice in which synaptic activity in this gut-to-brain circuit was genetically silenced, and prevented the development of behavioural preference for sugar. Moreover, we show that co-opting this circuit by chemogenetic activation can create preferences to otherwise less-preferred stimuli. Together, these findings reveal a gut-to-brain post-ingestive sugar-sensing pathway critical for the development of sugar preference. In addition, they explain the neural basis for differences in the behavioural effects of sweeteners versus sugar, and uncover an essential circuit underlying the highly appetitive effects of sugar.


Experiments in mice show that a population of neurons in the vagal ganglia respond to the presence of glucose in the gut and connect to neurons in the brainstem, revealing the circuit that underlies the neural basis for the behavioural preference for sugar.


  
Hydrocarbon migration in the multiple-sourced petroleum system in the northwestern Junggar Basin (northwestern China): Constraint from geochemical and phase fractionation analysis 期刊论文
AAPG BULLETIN, 2019, 103 (9) : 2247-2284
作者:  Wang, Aiguo;  Wang, Zhenliang;  Li, Long;  Fan, Changyu;  Zhang, Kuaile;  Xiang, Baoli;  Zhou, Ni;  Wang, Yi
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/27
Variation in atmospheric dust since 1950 from an ice core in the Central Tibetan Plateau and its relationship to atmospheric circulation 期刊论文
ATMOSPHERIC RESEARCH, 2019, 220: 10-19
作者:  Li, Peilin;  Wu, Guangjiang;  Zhang, Xuelei;  Yan, Ni;  Zhang, Xiaowen
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/26
Atmospheric dust  Ice core records  Tibetan Plateau  Atmospheric circulation  
Impacts of meteorology and emissions on summertime surface ozone increases over central eastern China between 2003 and 2015 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (3) : 1455-1469
作者:  Sun, Lei;  Xue, Likun;  Wang, Yuhang;  Li, Longlei;  Lin, Jintai;  Ni, Ruijing;  Yan, Yingying;  Chen, Lulu;  Li, Juan;  Zhang, Qingzhu;  Wang, Wenxing
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (1) : 617-638
作者:  Li, Bowei;  Ho, Steven Sai Hang;  Gong, Sunling;  Ni, Jingwei;  Li, Huairui;  Han, Liyan;  Yang, Yi;  Qi, Yijin;  Zhao, Dongxu
收藏  |  浏览/下载:7/0  |  提交时间:2019/04/09