检索结果-南通市图书馆

维普期刊数据库博看期刊

黄土高原水蚀风蚀交错区不同生物结皮类型对土壤有机碳及其转化的影响

在线全文

学校读者我要写书评

暂无评论

水土保持学报 2024年第4期38卷 38-44,54页

作者：武杰张丙昌陈静武志芳赵康山西师范大学地理科学学院山西师范大学黄河中游生态环境研究中心太原030000 山西师范大学生命科学学院太原030000 阜宁第一高级中学江苏阜宁224400

[目的]黄土高原水蚀风蚀交错区是典型的脆弱生态系统,该区域生物结皮广泛分布,生物结皮在土壤有机碳积累与转化发挥着关键作用,然而,生物结皮演替及微生物对土壤有机碳转化相关酶类的影响规律尚不明确。[方法]研究土壤有机碳-微生物-碳... 详细信息

[目的]黄土高原水蚀风蚀交错区是典型的脆弱生态系统,该区域生物结皮广泛分布,生物结皮在土壤有机碳积累与转化发挥着关键作用,然而,生物结皮演替及微生物对土壤有机碳转化相关酶类的影响规律尚不明确。[方法]研究土壤有机碳-微生物-碳转化相关酶在生物结皮不同演替类型的变化规律,并运用SEM模型分析了三者之间的相互关系。[结果](1)生物结皮演替显著增加土壤有机碳含量和碳转化相关酶活性,且它们在结皮层(0-2 cm)中的含量均显著高于裸沙和2—5 cm土层(p<0.05);(2)结皮层细菌、真菌和放线菌数量在藓结皮中最高,其中放线菌、真菌数量在生物结皮演替呈显著增加趋势,结皮层中的细菌和真菌数量显著高于2—5 cm土层,但2—5 cm土层放线菌数量高于结皮层(藓结皮除外);(3)SEM模型表明,土壤有机碳、碳转化相关酶活性和微生物数量之间均呈现显著相关性。[结论]生物结皮的演替对土壤有机碳的积累为碳转化相关酶类和微生物提供丰富基质,促进微生物和酶活性提高,微生物对碳转化相关酶类起着重要的驱动作用,对维持生物结皮的碳平衡发挥着关键作用。

关键词：水蚀风蚀交错区生物结皮土壤有机碳土壤酶活性

Responses of microbial activities and soil physical-chemical properties to the successional process of biological soil crusts in the Gurbantunggut Desert,Xinjiang

同方期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2015年第1期7卷 101-109页

作者： bingchang zhang XiaoBing ZHOU YuanMing zhang Key Laboratory of Biogeography and Bioresources in Arid Land Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences

Biological soil crusts （BSCs） are capable of modifying nutrient availability to favor the establishment of biogeochemical cycles. Microbial activities serve as critical roles for both carbon and nutrient transformation in BSCs. However, little is known about microbial activities and physical-chemical properties of BSCs in the Gurbantunggut Desert, Xinjiang, China. In the present research, a sampling line with 1-m wide and 20-m long was set up in each of five typical interdune areas selected randomly in the Gurbantunggut Desert. Within each sampling line, samples of bare sand sheet, algal crusts, lichen crusts and moss crusts were randomly collected at the depth of 0-2 cm. Varia- tions of microalgal biomass, microbial biomass, enzyme activities and soil physical-chemical properties in different succession of BSCs were analyzed. The relationships between microalgal biomass, microbial biomass, enzymatic activities and soil physical-chemical properties were explored by stepwise regression. Our results indicate that micro- algal biomass, microbial biomass and most of enzyme activities increased as the BSCs developed and their highest values occurred in lichen or moss crusts. Except for total K, the contents of most soil nutrients （organic C, total N, total P, available N, available P and available K） were the lowest in the bare sand sheet and significantly increased with the BSCs development, reaching their highest values in moss crusts. However, pH values significantly decreased as the BSCs developed. Significant and positive correlations were observed between chlorophyll a and microbial biomass C. Total P and N were positively associated with chlorophyll a and microbial biomass C, whereas there was a significant and negative correlation between microbial biomass and available P. The growth of cyanobacteria and microorganism contributed C and N in the soil, which offered substrates for enzyme activities thus increasing enzyme activities. Probably, improvement in enzyme

关键词： chlorophyll a microbial biomass C soil enzyme physical-chemical properties biological soil crusts

Ultrasound deep brain stimulation decelerates telomere shortening in Alzheimer’s disease and aging mice

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2023年第3期3卷 469-478页

作者： Yaya zhang Na Pang Xiaowei Huang Wen Meng Long Meng bingchang zhang Zhengye Jiang Jing zhang Zhou Yi Zhiyu Luo Zhanxiang Wang Lili Niu Department of Neurosurgery Xiamen Key Laboratory of Brain Centerthe First Affiliated Hospital of Xiamen UniversityXiamen 361003China Paul C.Lauterbur Research Center for Biomedical Imaging Institute of Biomedical and Health EngineeringShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Dongguan University of Technology Dongguan 523808China School of Medicine Xiamen UniversityXiamen 361000China Shanghai Green Valley Pharmaceutical Co. LtdShanghai 200120China

Telomere length is a reliable biomarker for health and longevity prediction in both humans and *** common neuromodulation techniques,including deep brain stimulation(DBS)and optogenetics,have excellent spatial resolution and depth penetration but require implementation of electrodes or optical ***,it is important to develop methods for noninvasive modulation of telomere ***,we reported on a new method for decelerating telomere shortening using noninvasive ultrasound deep brain stimulation(UDBS).Firstly,we found that UDBS could activate the telomerase-associated proteins in normal ***,in the Alzheimer’s disease mice,UDBS was observed to decelerate telomere shortening of the cortex and myocardial tissue and to effectively improve spatial learning and memory ***,UDBS was found to significantly slow down telomere shortening of the cortex and peripheral blood,and improve motor and cognitive functions in aging ***,transcriptome analysis revealed that UDBS upregulated the neuroactive ligand-receptor interaction ***,the present findings established the critical role of UDBS in delaying telomere shortening and indicated that ultrasound modulation of telomere length may constitute an effective therapeutic strategy for aging and aging-related diseases.

关键词： Noninvasive ultrasound Brain stimulation Telomere length Aging Alzheimer’s disease(AD)

High-Q collective Mie resonances in monocrystalline silicon nanoantenna arrays for the visible light

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fundamental Research 2023年第5期3卷 822-830页

作者： Zhenghe zhang Pengbo Liu Wanli Lu Ping Bai bingchang zhang Zefeng Chen Stefan A.Maier Jaime Gómez Rivas Shaojun Wang Xiaofeng Li School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou 215006China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Department of Applied Physics and Institute for Photonic Integration Eindhoven University of Technology5612 AE EindhovenThe Netherlands School of Physics and Astronomy Monash UniversityClaytonVictoria 3800Australia Department of Physics Imperial College LondonLondon SW72AZUK Chair in Hybrid Nanosystems Nanointitute MunichFaculty of PhysicsLudwig-Maximilians Universitaet MuenchenMuenchen 80539Germany

Dielectric optical antennas have emerged as a promising nanophotonic architecture for manipulating the propagation and localization of ***,the optically induced Mie resonances in an isolated nanoantenna are normally with broad spectra and poor𝑄-factors,limiting their performances in sensing,lasing,and nonlinear ***,we dramatically enhance the𝑄-factors of Mie resonances in silicon(Si)nanoparticles across the optical band by arranging the nanoparticles in a periodic *** select monocrystalline Si with negligible material losses and develop a unique method to fabricate nanoparticle arrays on a quartz *** extinction dispersion measurements and electromagnetic analysis,we can identify three types of collective Mie resonances with𝑄-factors∼500 in the same nanocylinder arrays,including surface lattice resonances,bound states in the continuum,and quasi-guided *** work paves the way for fundamental research in strong light-matter interactions and the design of highly efficient light-emitting metasurfaces.

关键词： Nanophotonics Dielectric resonators Surface lattice resonances Bound states in the continuum Quasi-guided modes

Snowpack shifts cyanobacterial community in biological soil crusts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Arid Land 2021年第3期13卷 239-256页

作者： zhang bingchang zhang Yongqing ZHOU Xiaobing LI Xiangzhen zhang Yuanming Geographical Science College Shanxi Normal UniversityLinfen 041004China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China

Winter snowpack is an important source of moisture that influences the development ofbiological soil crusts(BSCs)in desert *** are important photosynthetic organismsin ***,the responses of the cyanobacterial community in BSCs to snowpack,snow depth andmelting snow are still *** this study,we investigated the cyanobacterial community compositionand diversity in BSCs under different snow treatments(doubled snow,ambient snow and removed snow)and three snow stages(stage 1,snowpack;stage 2,melting snow;and stage 3,melted snow)in theGurbantunggut Desert in *** stages 1 and 2,Cyanobacteria were the dominant phylum in the bacterialcommunity in the removed snow treatment,whereas Proteobacteria and Bacteroidetes were abundant inthe bacterial communities in the ambient snow and doubled snow *** relative abundances ofProteobacteria and Bacteroidetes increased with increasing snow *** relative abundances ofCyanobacteria and other bacterial taxa were affected mainly by soil temperature and *** stages 2and 3,the relative abundance of Cyanobacteria increased quickly due to the suitable soil moisture andirradiance ***,Chroococcales,Nostocales,Synechococcales and unclassifiedCyanobacteria were detected in all the snow treatments,and the most dominant taxa were Oscillatorialesand *** cyanobacterial taxa showed different responses to *** moisture andirradiance were the two critical factors shaping the cyanobacterial community *** snowpackdepth and duration altered the soil surface irradiance,soil moisture and other soil properties,whichconsequently were selected for different cyanobacterial ***,local microenvironmentalfiltering(niche selection)caused by snow conditions may be a dominant process driving shifts in thecyanobacterial community in BSCs.

关键词： cyanobacterial diversity community structure biological soil crusts snowpack niche selection

APOE interacts with ACE2 inhibitingg SARS-CoV-2 cellular entry and inflammation in COVID-19 patients

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2022年第9期7卷 3459-3467页

作者： Hongsheng zhang Lin Shao Zhihao Lin Quan-Xin Long Huilong Yuan Lujian Cai Guangtong Jiang Xiaoyi Guo Renzhi Yang Zepeng zhang bingchang zhang Fan Liu Zhiyong Li Qilin Ma Yun-Wu zhang Ai-Long Huang Zhanxiang Wang Yingjun Zhao Huaxi Xu Center for Brain Sciences the First Aliated Hospital of Xiamen UniversityInstitute of NeuroscienceFujian Provincial Key Laboratory of Neurodegenerative Disease and Aging ResearchXiamen UniversityXiamenChina Institute for Brain Science and Disease Chongqing Medical UniversityChongqingChina school of Medicine Xiamen UniversityXiamenChina Key Laboratory of Molecular Biology for Infectius Diseases(Minstry of Educatio) Chongqing Medical UniversityChongqingChina

Apolipoprotein E(APOE)plays a pivotal role in lipid including cholesterol *** APOE 4(APOE4)allele is a major genetic risk factor for Alzheimer's and cardiovascular *** APOE has recently been associated with increased susceptibility to infections of several viruses,whether and how APOEand its isoforms affect SARS-CoV-2 infection remains ***,we show that serum concentrations of APOE correlate inversely with levels of cytokine/chemokine in 73 COVID-19 *** multiple protein interaction assays,we demonstrate that APOE3 and APOE4 interact with the SARS-CoV-2 receptor ACE2;and APOE/ACE2 interactions require zinc metallopeptidase domain of ACE2,a key docking site for SARS-CoV-2 Spike *** addition,immuno-imaging assays using confocal,super-resolution,and transmission electron microscopies reveal that both APOE3 and APOE4 reduce ACE2/Spikemediated viral entry into ***,while having a comparable binding affinity to ACE2,APOE4 inhibits viral entry to a lesser extent compared to APOE3,which is likely due to APOE4's more compact structure and smaller spatial obstacle to compete against Spike binding to ***,APOE e4 carriers clinically correlate with increased SARS-CoV-2 infection and elevated serum inflammatory factors in 142 COVID-19 patients *** study suggests a regulatory mechanism underlying SARS-CoV-2 infection through APOE interactions with ACE2,which may explain in part increased COVID-19 infection and disease severity in APOE e4 carriers.

关键词： ACE2 patients inflammation

Species composition,distribution patterns and ecological functions of biological soil crusts in the Gurbantunggut Desert

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Arid Land 2010年第3期2卷 180-189页

作者： zhang, YuanMing Wu, Nan zhang, bingchang zhang, Jing Chinese Acad Sci Xinjiang Inst Ecol & Geog Key Lab Biogeog & Bioresource Arid Land Urumqi 830011 Peoples R China

As one of the most important biological factors that maintain the stability of the largest fixed and semi-fixed desert in China, the Gurbantunggut Desert, the biological soil crusts (BSCs) develop well and play critical ecological roles in the desert ecosystem. In this paper, we briefly summarize our research findings since 2002 including species composition, distribution pattern and ecological functions of BSCs in the desert. Our results indicate abundant species diversity of BSCs in the Gurbantunggut Desert in comparison to other deserts in China. At the scales of sand dune or whole desert, the distribution patterns of BSCs are location-specific. The existence of BSCs in this desert could: (1) accelerate the formation of desert soil and the weathering of minerals; (2) accumulate organic matter in surface soil through related species in soil crusts; (3) enhance the abilities of sand surface to resist wind erosion; (4) influence seed germination of vascular plants; and (5) enhance the production of dew deposition on sandy soil surface.

关键词： biological soil crusts species diversity location-specific distribution desert ecosystem

Identification of serum metabolites enhancing inflammatory responses in COVID-19

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2022年第10期65卷 1971-1984页

作者： Chen-Song zhang bingchang zhang Mengqi Li Xiaoyan Wei Kai Gong Zhiyong Li Xiangyang Yao Jianfeng Wu Cixiong zhang Mingxia Zhu Lei zhang Xiufeng Sun Yi-Hong Zhan Zhengye Jiang Wenpeng Zhao Wei Zhong Xinguo Zhuang Dawang Zhou Hai-Long Piao Sheng-Cai Lin Zhanxiang Wang State Key Laboratory for Cellular Stress Biology School of Life SciencesXiamen UniversityXiamen361102China Department of Neurosurgery Xiamen Key Laboratory of Brain Centerthe First Affiliated Hospital of Xiamen UniversityXiamen361102China Department of Laboratory Medicine The First Affiliated Hospital of Xiamen UniversityXiamen361102China Department of pulmonary diseases The First Affiliated Hospital of Xiamen UniversityXiamen361102China School of Medicine Xiamen UniversityXiamen361102China Scientific Research Center for Translational Medicine Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China Institute of Neurosurgery School of MedicineXiamen UniversityXiamen361102China

Coronavirus disease 2019(COVID-19),caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),is characterized by a strong production of inflammatory cytokines such as TNF and IL-6,which underlie the severity of the ***,the molecular mechanisms responsible for such a strong immune response remains ***,utilizing targeted tandem mass spectrometry to analyze serum metabolome and lipidome in COVID-19 patients at different temporal stages,we identified that 611 metabolites(of 1,039)were significantly altered in COVID-19 *** them,two metabolites,agmatine and putrescine,were prominently elevated in the serum of patients;and 2-quinolinecarboxylate was changed in a biphasic manner,elevated during early COVID-19 infection but levelled *** tested in mouse embryonic fibroblasts(MEFs)and macrophages,these 3 metabolites were found to activate the NF-κB pathway that plays a pivotal role in governing cytokine ***,these metabolites were each able to cause strong increase of TNF and IL-6 levels when administered to wildtype mice,but not in the mice lacking NF-κ***,these metabolites have little effects on the activation of interferon regulatory factors(IRFs)for the production of type I interferons(IFNs)for antiviral *** data suggest that circulating metabolites resulting from COVID-19 infection may act as effectors to elicit the peculiar systemic inflammatory responses,exhibiting severely strong proinflammatory cytokine production with limited induction of the *** study may provide a rationale for development of drugs to alleviate inflammation in COVID-19 patients.

关键词： COVID-19 metabolites inflammation

Chlorophytes of biological soil crusts in Gurbantunggut Desert,Xinjiang Autonomous Region,China

在线全文

学校读者我要写书评

暂无评论

Frontiers in Biology 2008年第1期3卷 40-44页

作者： Jiancheng ZHAO bingchang zhang Yuanming zhang College of Life Science Hebei Normal UniversityShijiazhuang 050016China Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumuqi 830011China Graduate University of Chinese Academy of Sciences Beijing 100049China

In this paper,chlorophytes collected from 253 biological soil crust samples in Gurbantunggut Desert in Xinjiang Autonomous Region,China were studied by field investigation and microscopical observation in *** flora composition,ecological distribution of chlorophytes in the desert and dynamic changes of species composition of chlorophytes in different developing stages of biological soil crusts are preliminarily *** showed that there were 26 species belonging to 14 genera and 10 families,in which unicellular chlorophytes were *** existed some differences in distribution of varied sand dune *** taxa of chlorophytes in leeward of sand dunes are most abundant,but the taxa in windward,interdune and the top of sand dunes reduced *** were mainly distributed within the crust and the taxa of chlorophytes decrease obviously under the *** the devel-oping stages of the biological soil crust,species diversity of chlorophytes changed a little,but species composition pre-sented some *** humicola,Chlorella vulgaris,Chlamydomonas ovalis and Chlamydomonas *** existed in all developing stages of biological *** several former stages of the biological soil crust there were spherical chlorophytes and filamentous *** moss crust formed,filamentous chlorophytes disappeared,such as Microspora and Ulothrix.

关键词： Gurbantunggut Desert Xinjiang biological soil crust chlorophytes