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spatiotemporal dynamics of the microbial diversity on salt-preserved goatskins assessed by culturing and 16S rRNA gene amplicon sequencing

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Journal of Leather Science and Engineering 2022年第1期4卷 440-451页

作者： Xiaoguang Li Keya Sen Yuqin Zhang Yongqiang Tian Bi Shi Author details 1 Key Laboratory of Leather Chemistry and Engineering Ministry of Education and College of Biomass Science and EngineeringSichuan UniversityChengdu 610065People’s Republic of China Division of Biological Sciences STEMUniversity of WashingtonBothellWA 98011USA Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050People’s Republic of China

Wet-salted skin,as a special artificial high-salt environment,is rich in protein,fat,collagen and other nutrient substrates,and is a rich resource of halotolerant and halophilic microorganisms.However,knowledge gaps regarding the microbial community structure and inter taxa associations of wet-salted skin are large.In this study,the spatiotemporal dynamics and community structure of microorganisms present on wet-salted goatskins were investigated using 16S rRNA gene amplicon sequencing and culturable technique.Alpha diversity analysis based on Sobs,Chao,Ace and Shannon indices revealed that microbial diversity on the wet-salted goatskins exhibited a trend of‘down→up→down→flat’with time.During preservation,genera belonging to the bacteria domain such as Aci-netobacter,Weissella and Streptococcus were slowly dying out,whereas those belonging to halophilic archaea such as Natrialba and Haloterrigena were gradually flourishing.Moreover,to resist high-salt stress,microorganisms on the wet-salted goatskin gradually migrated from the outside to the inside,eventually leading to the microbial diversity inside the skin being the same as or even higher than that on the skin surface.Venn diagram analysis revealed that the strains of some genera,including Psychrobacter,Salimicrobium,Salinicola,Ornithinibacillus,Halomonas,Bacillus and Chromohalobacter,were distributed throughout the interior and exterior of the wet-salted goatskin and existed during various periods.Accordingly,45 protease-producing halophilic or halotolerant microorganisms were isolated and screened from the wet-salted goatskin using the gradient dilution plate method.Importantly,16S rRNA genes of some bacteria exhibited less than 99.5%similarity to valid published species,indicating that they likely are novel spe-cies and have a good potential for application.

关键词： Wet-salted skin spatiotemporal dynamics Community structure 16S rRNA gene amplicon sequencing

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spatiotemporal dynamics of the BRI1 Receptor and its Regulation by Membrane Microdomains in Living Arabidopsis Cells

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Molecular Plant 2015年第9期8卷 1334-1349页

作者： Li Wang Hong Li Xueqin Lv Tong Chen Ruili Li Yiqun xuei Jianjun Jiang Biao Jin Frantisek Baluska Jozef Samaj Xuelu Wang Jinxing Lin Key Laboratory of Ptant Resources Institute of Botany Chinese Academy of Sciences Beijing 100093 China College of Horticulture and Plant Protection Yangzhou University Yangzhou 225009 China College of Biological Sciences and Biotechnology Beijing Forestry University Beijing 100083 China State Key Laboratory of Genetic Engineering and Institute of Plant Biology School of Life Sciences Fudan University Shanghai 200433 China Institute of Cellular and Molecular Botany University of Bonn Kirschallee 1 D-53115 Bonn Germany Department of Cell Biology Palacky University OIomouc Olomouc 78371 Czech Republic College of Life Science and Technology Huazhong Agricultural University Wuhan 430070 China These authors contributed equally to the article.

The major brassinosteroid （BR） receptor of Arabidopsis BRASSINOSTEROID INSENSITIVE1 （BRI1） plays fundamental roles in BR signaling, but the molecular mechanisms underlying the effects of BR on BRI1 internalization and assembly state remain unclear. Here, we applied variable angle total internal reflection fluorescence microscopy and fluorescence cross-correlation spectroscopy to analyze the dynamics of GFP-tagged BRII. We found that, in response to BR, the degree of co-localization of BRI1-GFP with AtFIotl-mCherry increased, and especially BR stimulated the membrane microdomain-associated pathway of BRI1 internalization. We also verified these observations in endocytosis-defective chc2-1 mutants and the AtFIotl amiRNA 15-5 lines. Furthermore, examination of the phosphorylation status of bril-EMS-suppressor 1 and measurement of BR-responsive gene expression revealed that membrane microdomains affect BR signaling. These results suggest that BR promotes the partitioning of BRI1 into functional membrane microdomains to activate BR signaling.

关键词： BRI1 BR signaling endocytosis membrane microdomains spatiotemporal dynamics

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spatiotemporal dynamics of the urban sprawl in a typical urban agglomeration： a case study on Southern Jiangsu, China （1983-2007）

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Frontiers of Earth Science 2014年第4期8卷 490-504页

作者： Yongxue LIU Jieli CHEN Wangyu CHENG Chao SUN Saishuai ZHAO Yingxia PU School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China Changzhou Land and Resources Administration Wujin District Branch Changzhou 213161 China

China has experienced urbanization at an unprecedented rate over the past decades. Against this background, this paper demonstrates the multi-level spatiotemporal urban sprawl process from 1983 to 2007 on the perspective of urban agglomeration with a case study in Southern Jiangsu. Based on a combination of eight rounds of satellite images from 1983 to 2007, the presented results suggest the following three main findings：（1） At the prefecture-city level, the urban sprawl in Southern Jiangsu has presented significantly divergent growth patterns, with more than half of this vast growth occurring in the Suzhou prefecture-level city. （2） At the county level, clear spatial differentiations exist in the direction of the urban sprawl. The centroids of all county seats in the Suzhou and Wuxi prefecture-level cities have an eastward tendency （Shanghai oriented）, while those of the county seats in the Changzhou prefecture-level city tend to be westward （Nanjing oriented）. （3） At the township level, two convergent groups have gradually formed over time; namely, the low density urban zone in the western hilly land and the high density urban zone around the three central downtown areas. The urban areas close to urban cores tend to merge, showing a high-density convergent growth pattern, as do the western and southwestern townships in Southern Jiangsu, showing a low-density convergent growth pattern. All of these findings may be valuable for researchers and local authorities in providing reference for regional coordinated growth, environmental management, and urban planning decision-making.

关键词： Southem Jiangsu urban sprawl spatiotemporal dynamics rapid urbanization areas

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spatiotemporal dynamics of Green Total-factor Water-use Efficiency and Its Influencing Factors in China

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Chinese Geographical Science 2021年第5期31卷 795-814页

作者： MA Dalai ZHANG Fengtai GAO Lei YANG Guangming YANG Qing AN Youzhi School of Management Chongqing University of TechnologyChongqing 4QQQ54China CSIRO Waite CampusUrrbraeSA 5064Australia

In this study,we developed an evaluation index system for green total-factor water-use efficiency(GTFWUE)which reflected both economic and green efficiencies of water resource utilization.Then we measured the GTFWUE of 30 provinces/municipalities/autonomous regions(hereafter provinces)in China(not including Tibet,Hong Kong,Macao,Taiwan as no data)from 2000 to 2018 using a minimum distance to the strong frontier model that contained an undesirable output.We further analyzed the regional differences and spatial correlations of GTFWUE using these values based on Global and Local Moran’s I statistics,and empirically determined the factors affecting GTFWUE using a spatial econometric model.The evaluation results revealed that the GTFWUE differed substantially between the regions.The provinces with high and low GTFWUE values were located in the coastal and inland areas of China,respectively.The eastern region had a significantly higher GTFWUE than the central and western regions.The GTFWUEs for all three regions(eastern,central,and western regions)decreased slowly from 2000 to 2011(except 2005),remained stable from 2012 to 2016,and rapidly increased in 2017 before decreasing again in 2018.We found significant spatial correlations between the provincial GTFWUEs.The GTFWUE for most provinces belonged to the high-high or low-low cluster region,revealing a significant spatial clustering effect of provincial GTFWUEs.We also found that China’s GTFWUE was highly promoted by economic growth,population size,opening-up level,and urbanization level,and was evidently hindered by water endowment,technological progress,and government influence.However,the water-use structure had little impact on GTFWUE.This study fully demonstrated that the water use mode would be improved,and water resources needed to be used more efficiently and green in China.Moreover,based on the findings of this study,several policy recommendations were proposed from the aspects of cross-regional cooperation,economy,society,and institution.

关键词： green total-factor water-use efficiency(GTFWUE) spatiotemporal dynamics water scarcity influencing factors spatial econometric model

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spatiotemporal dynamics of carbon intensity from energy consumption in China

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Journal of Geographical Sciences 2014年第4期24卷 631-650页

作者： CHENG Yeqing WANG Zheye YE Xinyue WEI Yehua Dennis Northeast Institute of Geography and Agroecology CAS Changchun 130102 China University of Chinese Academy of Sciences Beijing 100049 China Department of Geography Kent State University Kent Ohio 44242 USA Department of Geography University of Utah Salt Lake City UT 84112-9155 USA

The sustainable development has been seriously challenged by global climate change due to carbon emissions. As a developing country, China promised to reduce 40%-45% below the level of the year 2005 on its carbon intensity by 2020. The realization of this target depends on not only the substantive transition of society and economy at the national scale, but also the action and share of energy saving and emissions reduction at the provincial scale. Based on the method provided by the IPCC, this paper examines the spati- otemporal dynamics and dominating factors of China＇s carbon intensity from energy con- sumption in 1997-2010. The aim is to provide scientific basis for policy making on energy conservation and carbon emission reduction in China. The results are shown as follows. Firstly, China＇s carbon emissions increased from 4.16 Gt to 11.29 Gt from 1997 to 2010, with an annual growth rate of 7.15%, which was much lower than that of GDP （11.72%）. Secondly, the trend of Moran＇s I indicated that China＇s carbon intensity has a growing spatial agglom- eration at the provincial scale. The provinces with either high or low values appeared to be path-dependent or space-locked to some extent. Third, according to spatial panel economet- ric model, energy intensity, energy structure, industrial structure and urbanization rate were the dominating factors shaping the spatiotemporal patterns of China＇s carbon intensity from energy consumption. Therefore, in order to realize the targets of energy conservation and emission reduction, China should improve the efficiency of energy utilization, optimize energy and industrial structure, choose the low-carbon urbanization approach and implement regional cooperation strategy of energy conservation and emissions reduction.

关键词： carbon intensity spatiotemporal dynamics spatial autocorrelation spatial panel model China

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spatiotemporal dynamics of electric power consumption in Chinese Mainland from 1995 to 2008 modeled using DMSP/OLS stable nighttime lights data

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Journal of Geographical Sciences 2012年第1期22卷 125-136页

作者： HE Chunyang MA Qun LI Tong YANG Yang LIU Zhifeng State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University College of Resources Science ＆ Technology Beijing Normal University

Electric power consumption （EPC） is one of the basic indices for evaluating electric power use. Obtaining timely and accurate data on the spatiotemporal dynamics of EPC is crucial for understanding and practical deployment of electric power resources. In this study, an EPC model was developed using stable nighttime lights time-series data from the Defense Meteorological Satellite Program Operational Linescan System （DMSP/OLS）. The model was used to reconstruct the spatial patterns of EPC in Chinese Mainland at the county level from 1995 to 2008. In addition, the spatiotemporal dynamics of EPC were analyzed, and the fol-lowing conclusions were drawn. （1） The EPC model reliably represented the spatiotemporal dynamics of EPC in Chinese Mainland with approximately 70% accuracy. （2） The EPC in most regions of Chinese Mainland was at low to moderate levels, with marked temporal and spatial variations; of high-level EPC, 58.26% was concentrated in eastern China. Six urban agglomerations （Beijing-Tianjin-Tangshan region, Shanghai-Nanjing-Hangzhou region, Pearl River Delta, Shandong Peninsula, middle-south of Liaoning Province, and Sichuan Basin） accounted for 10.69% of the total area of Chinese Mainland but consumed 39.23% of the electricity. （3） The EPC of most regions in Chinese Mainland increased from 1995 to 2008, and 64% of the mainland area showed a significant increase in EPC. Moderate increases in EPC were found in 61.62% of eastern China and 80.65% of central China from 1995 to 2008, whereas 75.69% of western China showed no significant increase in EPC. Meanwhile, 77.27%, 89.35%, and 66.72% of the Shanghai-Nanjing-Hangzhou region, Pearl River Delta, and Shandong Peninsula, respectively, showed high-speed increases in EPC. Moderate increases in EPC occurred in 71.12% and 72.13% of the Beijing-Tianjin-Tangshan region and middle-south of Liaoning Province, respectively, while no significant increase occurred in 56.34% of the Sichuan Basin.

关键词： DMSP/OLS electric power consumption spatiotemporal dynamics Chinese Mainland

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Tailoring spatiotemporal dynamics of plasmonic vortices

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Opto-Electronic Advances 2023年第4期6卷 16-26页

作者： Xinyao Yuan Quan Xu Yuanhao Lang Xiaohan Jiang Yuehong Xu Xieyu Chen Jie Han Xueqian Zhang Jiaguang Han Weili Zhang Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering Tianjin University and the Key Laboratory of Optoelectronics Information and Technology(Ministry of Education)Tianjin 300072China Guangxi Key Laboratory of Optoelectronic Information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin 541004China School of Electronic and Computer Engineering Oklahoma State UniversityStillwaterOK 74078USA.

Plasmonic vortices confining orbital angular momentums to surface have aroused wide research interest in the last decade.Recent advances of near-field microscopes have enabled the study on the spatiotemporal dynamics of plasmonic vortices,providing a better understanding of optical orbital angular momentums in the evanescent wave regime.However,these works only focused on the objective characterization of plasmonic vortex and have not achieved subjectively tailoring of its spatiotemporal dynamics for specific applications.Herein,it is demonstrated that the plasmonic vortices with the same topological charge can be endowed with distinct spatiotemporal dynamics by simply changing the coupler design.Based on a near-field scanning terahertz microscopy,the surface plasmon fields are directly obtained with ultrahigh spatiotemporal resolution,experimentally exhibiting the generation and evolution divergences during the whole lifetime of plasmonic vortices.The proposed strategy is straightforward and universal,which can be readily applied into visible or infrared frequencies,facilitating the development of plasmonic vortex related researches and applications.

关键词： plasmonic vortex surface plasmon spatiotemporal dynamics optical orbital angular momentum

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Modeling columnar spatiotemporal dynamics of nitric oxide as a primary controlling element of arteriole dilation during neurovascular coupling

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Science China(Life Sciences) 2010年第12期53卷 1418-1427页

作者： YANG Yong WANG MingLai FAN YingLe ZHENG XiaoXiang Department of Biomedical Engineering Hangzhou Dianzi UniversityHangzhou 310018China College of Biomedical Engineering and Instruments Zhejiang UniversityHangzhou 310028China

Although the mechanism of neurovascular coupling remains inadequately understood,physiological research has indicated that the dilation of arterioles located within the cerebral cortex column might represent the primary mechanism of hemodynamic response during neurovascular coupling.This study examined the spatiotemporal pattern of NO diffusion induced by functional stimuli at column spatial resolution.Our modeling makes it possible to explore the responses of mediating factors to functional stimuli from a four-dimensional view,which may lead the way to decoding the mechanism of neurovascular coupling.

关键词： nitric oxide spatiotemporal dynamics cortex column neurovascular coupling arteriole dilation

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spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers

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Chinese Physics B 2017年第1期26卷 224-228页

作者：赵睿睿王丁黄志远冷雨欣李儒新 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China

We numerically study the propagation dynamics of intense optical pulses in gas-filled hollow-core fibers（HCFs）. The spatiotemporal dynamics of the pulses show a transition from tightly confined to loosely confined characteristics as the fiber core is increased, which manifests as a deterioration in the spatiotemporal uniformity of the beam. It is found that using the gas pressure gradient does not enhance the beam quality in large-core HCFs, while inducing a positive chirp in the pulse to lower the peak power can improve the beam quality. This indicates that the self-focusing effect in the HCFs is the main driving force for the propagation dynamics. It also suggests that pulses at longer wavelengths are more suitable for HCFs with large cores because of the lower critical power of self-focusing, which is justified by the numerical simulations. These results will benefit the generation of energetic few-cycle pulses in large-core HCFs.

关键词： spatiotemporal dynamics hollow-core fiber longer wavelengths

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Cortico–subcortical spatiotemporal dynamics in Parkinson’s disease can be modulated by transcranial alternating current stimulation

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Brain Science Advances 2023年第2期9卷 114-135页

作者： Tiantian Liu Zilong Yan Ziteng Han Jian Zhang Boyan Fang Tianyi Yan School of Life Science Beijing Institute of TechnologyBeijing 100081China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China School of Medical Technology Beijing Institute of TechnologyBeijing 100081China Parkinson Medical Center Beijing Rehabilitation HospitalCapital Medical UniversityBeijing 100144China

Objective:We investigated changes in cortico–subcortical spatiotemporal dynamics to explore the treatment mechanisms oftranscranial alternating current stimulation(tACS)in patientswith Parkinson’s disease(PD).Methods:Resting-state functional magnetic resonance imaging(rs-fMRI)data were collected from 20 patients with PD and 20 normal controls(NC).Each patient with PD received successivemultidisciplinary intensive rehabilitation treatment and tACStreatment over a one-year interval.Individual functional brain network mapping and co-activation pattern(CAP)analysis were performed to characterize cortico–subcortical dynamics.Results:The same tACS electrode placement stimulated different proportions of functional brain networks across the participants.CAP analysis revealed that the visual network,attentional network,and default mode network co-activated with the thalamus,accumbens,and amygdala,respectively.The pattern characterized by thede-activation of the visual network and the activation of the thalamus showed a significantly low amplitude in the patients with PD than inNCs,and this amplitude increased after tACS treatment.Furthermore,the co-occurrence of cortico–subcortical CAPs was significantly higherin patients with PD than in NCs and decreased after tACS treatment.Conclusions:This study investigated cortico–subcortical spatiotemporaldynamics in patients with PD and further revealed the tACS treatmentmechanism.These findings contribute to understanding cortico–subcortical dynamics and exploring noninvasive neuromodulationtargets of cortico–subcortical circuits in brain diseases,such as PD,Alzheimer’s disease,and depression.

关键词： spatiotemporal dynamics cortico–subcortical co-activation pattern transcranial alternating current stimulation Parkinson’s disease resting-state functional MRI

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