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Distribution of Soil Organic Carbon Fractions Along the Altitudinal Gradient in Changbai Mountain,China

Pedosphere 2011年第5期21卷 615-620页

作者： zhang Min zhang {2.-Ke LIANG Wen-Ju JIANG Yong DAI Guan-Hua WANG Xu-Gao HAN Shi-{3. State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110164 (China) Vegetable Research institute Liaoning Academy of Agricultural Sciences Shenyang 110161 (China) Graduate University of chinese academy of sciences Beijing 100049 (China)

Understanding the responses of soil organic carbon(SOC) fractions to altitudinal gradient variation is important for understanding changes in the carbon balance of forest *** our study the SOC and its fractions of readily oxidizable carbon(ROC),water-soluble carbon(WSC) and microbial biomass carbon(MBC) in the soil organic and mineral horizons were investigated for four typical forest types,including mixed coniferous broad-leaved forest(MCB),dark coniferous spruce-fir forest(DCSF),dark coniferous spruce forest(DCS),and Ermans birch forest(EB),along an altitudinal gradient in the Changbai Mountain Nature Reserve in Northeast *** results showed that there was no obvious altitudinal pattern in the *** variation trends of SOC with altitude were observed between the organic and mineral *** differences in the contents of SOC,WSC,MBC and ROC were found among the four forest types and between *** contents of ROC in the mineral horizon,WSC in the organic horizon and MBC in both horizons in the MCB and EB forests were significantly greater than those in either DCSF or DCS *** proportion of soil WSC to SOC was the lowest among the three main *** contents of WSC,MBC and ROC were significantly correlated(P < 0.05) with SOC *** can be concluded that vegetation types and climate were crucial factors in regulating the distribution of soil organic carbon fractions in Changbai Mountain.

关键词： active carbon fractions altitude forest ecosystem Northeast China vegetation type

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Near infrared lights emission of ^(40)Ar^(1.+) impacting on metal surfaces

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Science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 1021-1026页

作者： zhang xiaoAn1,2. xiao GuoQing2. YANG ZhiHu2. WANG Li1 & ZHAN WenLong2.1 Department of Physics, Xianyang Normal University, Xianyang 712.00, China 2.{3. of Modern Physics, chinese academy of sciences, Lanzhou 73.000, China Department of Physics Xianyang Normal University Xianyang 712000 China institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China

The highly charged ion 40Ar1.+ with the velocity (kinetic energy EK=1.0 keV, velocity V=8.5×1.5 m/s) smaller than Bohr velocity (VBohr=2.9×1.6 m/s) was found to hove impacts on the surfaces of metals Ni, Mo, Au and Al, and the Ar atomic infrared light lines and X-rays spectra were simultaneously measured. The experimental results show that the highly charged ion that captures electrons is neutralized, and the multiply-excited hollow atom forms. The hollow atom cascade decay radiates lights from infrared to X-ray spectrum. The intensity of infrared lights shows that the metallic work functions play an important role in the neutralization process of highly charged ions during their interaction with metallic surfaces, which verifies the classical over-the-barrier model.

关键词： infrared light lines X-ray neutralization highly charged ions

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AKT2.(S1.0})/CCTα^(S3.5/3.9/3.0})-positive cancer-associated fibroblasts (CAFs) mediate focal adhesion kinase (FAK) inhibitors resistance via secreting phosphatidylcholines (PCs)

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Signal Transduction and Targeted Therapy 2024年第2期9卷 782-796页

作者： jie Chen Lingyuan {1. Yuheng Zhu Di Zhao {2.g {1. Yanmeng Zhu {2.gyuan Pang Yuanfan xiao Qingnan Wu Yan Wang Qimin Zhan Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Laboratory of Molecular OncologyPeking University Cancer Hospital&Institute100142 BeijingChina Peking University International Cancer institute Peking University100191 BeijingChina Research Unit of Molecular Cancer Research Chinese Academy of Medical SciencesBeijingChina Soochow University Cancer institute Suzhou 215000China institute of Cancer Research Shenzhen Bay LaboratoryShenzhen 518107China

Abnormal metabolism is regarded as an oncogenic hallmark related to tumor progression and therapeutic *** study employed multi-omics,including phosphoproteomics,untargeted metabolomics and lipidomics,to demonstrate that the pAKT2.Ser1.0} and pCCTαSer3.5/3.9/3.0}-positive cancer-associated fibroblasts(CAFs)substantially release phosphatidylcholines(PCs),contributing to the resistance of focal adhesion kinase(FAK)inhibitors in esophageal squamous cell carcinoma(ESCC)***,we observed extremely low levels of FAK Tyr3.7 expression in CAFs,potentially offering no available target for FAK inhibitors playing their anti-growth role in ***,FAK inhibitor increased the intracellular concentration of Ca2.in CAFs,promoting the formation of AKT2.CCTαcomplex,leading to phosphorylation of CCTαSer3.5/3.9/3.0} sites and eventually enhancing stromal PC *** activation could stimulate the intratumoral Janus kinase 2.JAK2./Signal transducer and activator of transcription 3.STAT3.pathway,triggering resistance to FAK *** of clinical samples demonstrated that stromal pAKT2.Ser1.0} and pCCTαSer3.5/3.9/3.0} are related to the tumor malignancy and reduced patient ***-targeted lipidomics and further validation cohort quantitatively showed that plasma PCs enable to distinguish the malignant extent of ESCC *** conclusion,inhibition of stroma-derived PCs and related pathway could be possible therapeutic strategies for tumor therapy.

关键词： CAFs metabolism resistance

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X-ray spectra induced by ^(1.0})Xe^(q+) impacting the metal surface

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Science China(Physics,Mechanics & Astronomy) 2008年第1期51卷 82-89页

作者： zhang xiaoAn 1,2.,xiao GuoQing 1 ,YANG ZhiHu 1 ,CHEN XiMeng 3.,ZHAO YongTao 1 , LI FuLi 4 ,WANG Li 1,2.,CUI Ying 3.,zhang HongQiang 3.&ZHAN WenLong 1 1institute of Modern Physics,chinese academy of sciences,Lanzhou 73.000,China 2.epartment of Physics,Xianyang Normal University,Xianyang 712.00,China 3.epartment of Modern Physics,Lanzhou University,Lanzhou 73.000,China 4Department of Applied Physics,Xi’an Jiaotong University,Xi’an 710049,China 1. institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China 2. Department of Physics Xianyang Normal University Xianyang 712000 China 3. Department of Modern Physics Lanzhou University Lanzhou 730000 China 4. Department of Applied Physics Xi’an Jiaotong University Xi’an 710049 China

Using the slow highly charged ions 1.0} Xe q+ (q=2.,2.,2.;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic X-ray spectrum is *** result shows that as long as the charge state of projectile is high enough,the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak(nA magnitude),and the X-ray yield per ion is in the order of 1.-8and increases with the kinetic energy and potential energy of *** measuring the Au Mα-X-ray spectra,Au atomic N-level lifetime is estimated at about 1.3.×1.-1.s based on Heisenberg uncertainty relation.

关键词： slow highly charged ions characteristic X-ray level lifetime

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Approaching the theoretical capacity of TiO_(2. anode in a photorechargeable lithium-ion battery

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Nano Research 2024年第4期17卷 2655-2662页

作者： Wen Yan jie Wang Qing Hu {1.g{1.g Fu Mohamed K.Albolkany Tian {3. xiao Lu Fei Ye Bo Liu School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China

New generation of lithium-ion batteries(LIBs)integrating solar energy conversion and storage is emerging,as they could solve the fluctuation problem in the utilization of solar ***-rechargeable lithium-ion batteries(PR-LIBs)are ideal devices for such target,in which solar energy is converted into electricity and stored in *** order to achieve the high performance of PR-LIB,it is crucial to develop dual-function electrode materials that can synergistically capture solar energy and store ***,we present photo-rechargeable lithium-ion batteries using defective black TiO_(2. as photoanode prepared by lithium *** photoanode exhibits excellent photo response in full solar spectrum with a capacity enhancement of 46.4%under illumination,corresponding to the energy conversion efficiency of 4.4%at the current density of 1.A·g^(-1..When illumination is applied at 2. mA·g^(-1.,the battery capacity increases from~2.0 in dark to~3.9 mAh·g^(-1. at the first cycle,and then stabilizes at 3.0 mAh·g^(-1.,approaching the theoretical value of 3.5 mAh·g^(-1. of TiO_(2. electrode *** finding provides thoughts for breaking the capacity limitations in TiO_(2. and paves the way for powering LIBs by solar illumination.

关键词： photo-rechargeable lithium-ion batteries photoanode defective TiO_(2.(D-TiO_(2.)

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Determination of vertical gradient of gravity anomaly with topographic data

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chinese Science Bulletin 1999年第11期44卷 1029-1034页

作者： zhang Chijun{1. of {2. and Geophysics ,{3. , wuhan 43.077 , China institute of {1. and Geophysics Chinese Academy of Sciences Wuhan China

The role of vertical gradient of gravity anomaly in the solution and interpretation of geological and geophysical problems on superficial layer is increasingly evident. However, it is difficult to directly observe the vertical gradient of gravity anomaly in mountainous area. Moreover,aerial and satellite gravity gradient measurments have not been put into practice up to date *** vertical gradient of gravity anomaly is calculated by use of topographic data and several problems concerned are investigated and discussed. It turns out in theory and practice that the relative error of the vertical gradient determined with the method is only 5%, and when the vertical gradient of gravity anomaly reaches the maximum 1.000 ns-2./sup> the error is only 50 ns-2./sup>. In addition, how to divide ring zones in calculation and the errors caused by the inaccuracy of landform elevation and rock density has been quantitatively analysed.

关键词： vertical gradient gravity anomaly topographic mass geoid.

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The properties of halo structure for ^(1.)B

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Science China(Physics,Mechanics & Astronomy) 2008年第7期51卷 781-787页

作者： HU ZhengGuo1, WANG Meng1, XU HuShan1, SUN ZhiYu1, WANG JianSong1, xiao GuoQing1, ZHAN WenLong1, xiao ZhiGang1, MAO RuiShi1,2. LI Chen1, {2. XueYing1,2. {2. HongBin1, ZHAO TieCheng1, XU ZhiGuo1, WANG Yue1,2. CHEN RuoFu1,2. HUANG TianHeng1,2. FU Fen1,2. GAO Qi1,2. HAN JianLong1,2. {2. XueHeng1,2. ZHENG Chuan1,2. YU YuHong1,2.& GUO ZhongYan1 1 institute of Modern Physics, chinese academy of sciences, Lanzhou 73.000, China 2.Graduate University of the chinese academy of sciences, Beijing 100049, China 1. institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China 2. Graduate University of the{1. Beijing 100049 China

The total reaction cross section (1.2.±9{1.mb) of 1.B at the energy of 4{1.7 A MeV on C target has been measured by using the transmission method at the Radioactive Ion Beam Line in Lanzhou (RIBLL). Assuming 1.B consists of a core 1.B plus two halo neutrons,the total cross section of 1.B on C target was calculated with the zero-range Glauber model,where double Gaussian density distributions and Gaussian plus HO density distributions were used. It can fit the experimental data very well. The characteristic of halo structure for 1.B was found with a large diffusion of the neutrons density distribution.

关键词： total cross section density distribution Glauber model the characteristic of halo structure

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Mitochondrial dysfunction affects hepatic immune and metabolic remodeling in patients with hepatitis B virus-related acute-onchronic liver failure

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World Journal of Gastroenterology 2024年第8期30卷 881-900页

作者： Yu zhang {1.-Ling Tian {2.-Qun Li Dong-Sheng Wu Qiang Li Bin Chen Department of Hepatology Institute of HepatologyThe First Affiliated Hospital of Hunan University of Chinese MedicineChangsha 410021Hunan ProvinceChina Department of Liver Transplant Transplant Medical Research CenterThe Second Xiangya Hospital of Central South UniversityChangsha 410011Hunan ProvinceChina Department of Surgery The First Affiliated Hospital of Hunan University of Chinese MedicineChangsha 410021Hunan ProvinceChina

BACKGROUND Immune dysregulation and metabolic derangement have been recognized as key factors that contribute to the progression of hepatitis B virus(HBV)-related acute-on-chronic liver failure(ACLF).However,the mechanisms underlying immune and metabolic derangement in patients with advanced HBV-ACLF are *** To identify the bioenergetic alterations in the liver of patients with HBV-ACLF causing hepatic immune dysregulation and metabolic *** Liver samples were collected from 1. healthy donors(HDs)and 1. advanced HBV-ACLF patients who were eligible for liver *** mitochondrial ultrastructure,metabolic characteristics,and immune microenvironment of the liver were *** focus was given to organic acid metabolism as well as the function and subpopulations of macrophages in patients with *** Compared with HDs,there was extensive hepatocyte necrosis,immune cell infiltration,and ductular reaction in patients with *** patients,the liver suffered severe hypoxia,as evidenced by increased expression of hypoxia-inducible factor-1..Swollen mitochondria and cristae were observed in the liver of *** number,length,width,and area of mitochondria were adaptively increased in *** metabolomics analysis revealed that mitochondrial oxidative phosphorylation decreased,while anaerobic glycolysis was enhanced in patients with *** findings suggested that,to a greater extent,hepa-tocytes used the extra-mitochondrial glycolytic pathway as an energy *** with HBV-ACLF had elevated levels of chemokine C-C motif ligand 2.in the liver homogenate,which stimulates peripheral monocyte infiltration into the *** and functional analysis of macrophage subsets revealed that patients with ACLF had a high abundance of CD68^(+)HLA-DR^(+)macrophages and elevated levels of both interleukin-1.and transforming growth factor-β1.in their *** abundance of CD2.6^(+)CD1.3.(+)macrophag

关键词： Acute-on-chronic liver failure Hypoxia-inducible factor-1. Mitochondria Metabolic phenotype Immune cells

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Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high-density hydrogen storage in water bath environments

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Rare Metals 2024年第10期43卷 5229-5241页

作者： Hua-Zhou Hu Hou-Qun xiao Xin-Cong He Wen-Hao Zhou xiao-Xuan {2. Rui-Zhu Tang {3. Li Chuan-Ming Ma Qing-Jun Chen Key Laboratory of Rare Earths Chinese Academy of SciencesJiangxi Institute of Rare EarthsGanjiang Innovation AcademyChinese Academy of Sciences

The V-based body-centered cubic （BCC）-type hydrogen storage alloys have attracted significant attention due to their high theoretical hydrogen storage capacity of3.80 wt%.However,their practical application faces challenges related to low dehydriding capacity and poor activation *** overcome these challenges,a BCC-type Ti–V–Cr–Mn–Mo–Ce high-entropy alloy（HEA） with an effectively dehydriding capacity of {1.5 wt% above 0.1.MPa was *** introduction of Mo and conducting heat treatment,the precipitation of Ti-rich phase in HEA was successfully suppressed,resulting in improved compositional uniformity and dehydriding ***,the effective dehydriding capacity increased significantly from 0.60 wt% to {1.50 wt% a65℃,surpassing that of other types of hydrogen storage alloys under the same ***,the addition of 1.wt%Ce enabled initial hydrogen absorption at {1.℃ without the need for activation at 400℃.Furthermore,Ce doping reduced the dehydriding activation energy of the Ti–V–Cr–Mn–Mo–Ce HEA from 5{1.71.to 4{1.8{1.kJ·mol-1.dditionally,the enthalpy value of dehydrogenation decreased from 46.89 to 1..96 k J·mol-1.attributed to a decrease in the hysteresis factor from 0.68 to *** findings provide valuable insights for optimizing the hydrogen storage property of HEA.

关键词： BCC structure Ce doping Heat treatment High-entropy alloys Hydrogen storage alloys

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Silence of Synaptotagmin VII inhibits release of dense core vesicles in PC1.0}cells

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Science China(Life sciences) 2009年第12期52卷 1156-1163页

作者： LI JiangLi1. xiao Yang1. ZHOU Wei1. WU ZhengXing1. {1. RongYing1. & XU Tao1.2. 1.Key Laboratory of Molecular Biophysics of the Ministry of Education, {2. of Biophysics and Biochemistry, College of Life Science and Technology, Huazhong University of Science and Technology, {3. 43.074, China 2.National Key Laboratory of Biomacromolecules, {2. of Biophysics, chinese academy of sciences, Beijing 1.01.1. China. Key Laboratory of Molecular Biophysics of the Ministry of Education Institute of Biophysics and Biochemistry College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China National Key Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

Synaptotagmin VII (Syt VII), which has a higher Ca2. affinity and slower disassembly kinetics with lipid than Syt I and Syt IX, was regarded as being uninvolved in synaptic vesicle (SV) exocytosis but instead possibly as a calcium sensor for the slower kinetic phase of dense core vesicles (DCVs) release. By using high temporal resolution capacitance and amperometry measurements, it was demonstrated that the knockdown of endogenous Syt VII attenuated the fusion of DCV with the plasma membrane, reduced the amplitude of the exocytotic burst of the Ca2.-triggered DCV release without affecting the slope of the sustained component, and blocked the fusion pore expansion. This suggests that Syt VII is the Ca2. sensor of DCV fusion machinery and is an essential factor for the establishment and maintenance of the pool size of releasable DCVs in PC1.0}cells.

关键词： Synaptotagmin VII dense core vesicles exocytosis RNA-mediated interference (RNAi)

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