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BET Surface Area and Porous Structure of Fullerenes and Fullerene Soots

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Chemical Research in Chinese Universities 1999年第1期15卷 92-95页

作者： CHEN Jian-xin SHENG Guo-ying liu shu-ying liu Zi-yang liu Zhi-qiang FU Jia-mo ZHANG Xiao-mei Changchun Institute of Applied Chemistry a Chinese Academy of SciencesChangchun130022 State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of ScienoesGuangzhou510640 Institute of Animal Saience Guangdong Acadeny of Agricultural Science510640 Environmental Monitoring Centeral Station off Jilin Province Changchun130011

ＩｎｔｒｏｄｕｃｔｉｏｎＡｆａｓｃｉｎａｔｉｎｇｓｏｌｉｄｂｌａｃｋｃｏｎｄｅｎｓａｔｅ（ｈｅｒｅｃａｌｅｄｆｕｌｅｒｅｎｅｓｏｏｔ）ｉｓｇｅｎｅｒａｔｅｄｉｎｔｈｅｇａｓｐｈａｓｅａｎｄｄｅｐｏｓｉｔｅｄｄｕｒｉｎ... 详细信息

ＩｎｔｒｏｄｕｃｔｉｏｎＡｆａｓｃｉｎａｔｉｎｇｓｏｌｉｄｂｌａｃｋｃｏｎｄｅｎｓａｔｅ（ｈｅｒｅｃａｌｅｄｆｕｌｅｒｅｎｅｓｏｏｔ）ｉｓｇｅｎｅｒａｔｅｄｉｎｔｈｅｇａｓｐｈａｓｅａｎｄｄｅｐｏｓｉｔｅｄｄｕｒｉｎｇｔｈｅｄｉｓｃｈａｒｇｅｉｎａＫ...

关键词： Fullerenes Fullerene soots Surface area Pore size distribution Adsorbent

Critical survival barrier for branching random walk

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Frontiers of Mathematics in China 2019年第6期14卷 1259-1280页

作者： Jingning liu mei ZHANG School of Mathematical Sciences Chongqing Normal UniversityChongqing 400047China School of Mathematical Sciences Laboratory of Mathematics and Complex SystemsBeijing Normal UniversityBeijing 100875China

We consider a branching random walk with an absorbing barrier,where the associated one-dimensional random walk is in the domain of attraction of an a-stable *** shall prove that there is a barrier and a critical value such that the process dies under the critical barrier,and survives above *** generalizes previous result in the case that the associated random walk has finite variance.

关键词： Branching random walk cv-stable spine absorption critical barrier

The Late Triassic Sequence-Stratigraphic Framework of the Upper Yangtze Region,South China

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 51-75页

作者： mei Mingxiang liu Shaofeng School of Earth Sciences and Resources China University of Geosciences

In the transitional period between the Middle and the Late Triassic, the Indochina orogeny caused two tectonic events in South China:(1) the formation and uplift of the Qinling-Dabie orogenic belt along the northern margin of the South China Plate, due to its collision with the North China Plate; and 2) the development of a 1300-km-wide intra-continental orogen in the southeastern part of the South China Plate, which led to a northwestward movement of the foreland thrust-fold zone. These tectonic events resulted in the ending of the Yangtze Platform, and were a stable paleogeographic factor from the Eidacaran to the end of the Middle Triassic. This platform was characterized by the widespread development of shallow-water carbonates. After the end of the Yangtze Platform, the upper Yangtze foreland basin(or Sichuan foreland basin) was formed during the Late Triassic and became a accumulation site of fluvial deposits that are composed of related strata of the Xujiahe Formation. In western Sichuan Province, the Xujiahe Formation overlies the Maantang Formation shallow-water carbonate rocks of the Xiaotangzi Formation siliciclastic rocks(from shelf shales to littoral facies). The sequence-stratigraphic framework of the Upper Triassic in the upper Yangtze foreland basin indicates a particular alluvial architecture, characterized by sequences composed of(1) successions of low-energy fluvial deposits of high-accommodation phases, including coal seams, and(2) high-energy fluvial deposits of low-accommodation phases, including amalgamated river-channel sandstones. The spatial distribution of these fluvial deposits belonging to the Xujiahe Formation and its relative strata is characterized by gradual thinning-out, overlapping, and pinching-out toward both the east and south. This sedimentary record therefore expresses a particular sequence-stratigraphic succession of fluvial deposits within the filling succession of the foreland basin. The sequence-stratigraphic framework for

关键词： Late Triassic sequence-stratigraphic framework upper Yangtze foreland basin upper Yangtze region South China

Assessing spatio-temporal variations of precipitation-use efficiency over Tibetan grasslands using MODIS and in-situ observations

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Frontiers of Earth Science 2016年第4期10卷 784-793页

作者： Zhengjia liu mei HUANG Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing 100101 China

Clarifying the spatial and temporal variations in precipitation-use efficiency （PUE） is helpful for advancing our knowledge of carbon and water cycles in Tibetan grassland ecosystems. Here we use an integrated remote sensing normalized difference vegetation index （NDVI） and in-situ above-ground net primary production （ANPP） measurements to establish an empirical exponen- tial model to estimate spatial ANPP across the entire Tibetan Plateau. The spatial and temporal variations in PUE （the ratio of ANPP to mean annual precipitation （MAP））, as well as the relationships between PUE and other controls, were then investigated during the 2001- 2012 study period. At a regional scale, PUE increased from west to east. PUE anomalies increased significantly （〉 0.1 g.m^-***^-1/10 yr） in the southern areas of the Tibetan Plateau yet decreased （〉 0.02 g. m^-2. mm 1/10 yr） in the northeastern areas. For alpine meadow, we obtained an obvious breaking point in trend of PUE against elevation gradients at 3600 m above the sea level, which showed a contrasting relationship. At the inter-annual scale, PUE anomalies were smaller in alpine steppe than in alpine meadow. The results show that PUE of Tibetan grasslands is generally high in dry years and low in wet years.

关键词： normalized difference vegetation index(NDVI) Tibetan Plateau inter-annual variations alpinegrasslands exponential model

Giant Magneto-Impedance Effect in As-Deposited Multilayered Amorphous Films

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Chinese Physics Letters 1999年第6期16卷 452-454页

作者： XIAO shu-qin liu De-zhen liu Yi-hua DAI You-yong ZHANG Lin mei Liang-mo Department of Physics Shandong UniversityJi'nan 250100 College of Materials Science and Engineering Shandong University of TechnologyJi'nan 250014

Giant magneto-impedance effects have been observed in as-deposited amorphous FeCuNbSiB/Cu/FeCuNbSiB and FeCuNbSiB/SiO_(2)/Ag/SiO_(2)/FeCuNbSiB multilayered *** films were deposited onto Si substrates by radio frequency *** FeCuNbSiB/Cu/FeCuNbSiB films,maximum giant magneto-impedance ratios as large as 32%and 11%were obtained at 13 MHz in the longitudinal and transverse fields,*** FeCuNbSiB/SiO_(2)/Ag/SiO_(2)/FeCuNbSiB films,the maximum giant magneto-impedance ratios were 47%and 57%at the same frequency for the two cases,which are much larger than those obtained in the annealed single layer Hlms.

关键词： impedance amorphous transverse

Supernova β^- decay of nuclides ^(53)Fe,^(54)Fe,^(55)Fe and ^(56)Fe in strongly screened plasma

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Research in Astronomy and Astrophysics 2018年第1期18卷 95-100页

作者： Jing-Jing liu Dong-mei liu College of Electronic and Communication Engineering Hainan Tropical Ocean University

Electron screening has strong effects on electron energy and threshold energy of the beta decay *** this paper,we study β~-decay rates of some iron *** beta decay rates increase by about two orders of magnitude due to electron *** screened beta decay rates due to Q-value correction are more than one order of magnitude higher than those without Q-value correction.

关键词： physical data and processes:nuclear reactions nucleosynthesis abundances stars:supernovae

Potential quality evaluation approach for the absolute growth years’ wild and transplanted Astragali Radix based on anti-heart failure efficacy

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Chinese Journal of Natural Medicines 2020年第6期18卷 460-471页

作者： LI Ke ZHANG Rui LI shu-Ying liu Yue-Tao LI Ai-Ping liu Xiao-Jie DU Guan-Hua QIN Xue-mei Modern Research Center for Traditional Chinese Medicine Shanxi UniversityTaiyuan 030006China College of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan 030006China Key Laboratory of Chemical Biology and Molecular Engineering Ministry Shanxi UniversityTaiyuan 030006China Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

The quality of Astragali Radix(AR) was closely related to the growth period. However, the current commodity grades of AR were only divided by diameter but not directly related to the growth period, which leads to the contradiction between the grade standard and the quality evaluation index. Therefore, solving this problem will be the key for the quality evaluation of AR. The present study established a potential quality evaluation approach for the absolute growth years’ wild Astragali Radix(WAR) and transplanted Astragali Radix(TAR) based on the chemical components and anti-heart failure efficacy through adopting a bare-handed sections approach to rapidly identify the growth years of WAR. In this study, the absolute growth years of WAR were obtained by identifying the growth rings of 1–6 growth years root through the methods. The contents of flavonoids and saponins in 2–6 growth years’ WAR were determined by HPLC-UV-ELSD. The contents of 12 chemical components and the anti-fatigue failure effects of WAR(4-year-old)and TAR were compared on rat models of heart failure induced by doxorubicin. Meanwhile, NMR-based untargeted metabolomics studies were performed to investigate the regulative effects of WAR and TAR. The result shows that the numbers of growth rings were consistent with the actual growth periods of AR. The HPLC-UV-ELSD determination indicated that the content of total flavonoids in WAR was significantly higher than that in TAR. Pharmacodynamics analysis revealed that the effects of WAR on cardiac function parameters(EF, FS and LVIDs), contents of serum CK and BNP were superior to those of TAR. 13 metabolites of heart were identified that had a higher rate of change in WAR group than TAR. Overall, a rapid identification method for the growth years of WAR was established, and the fact that WAR were significantly better than TAR in the heart failure rats was first proved in the paper. This study provided a scientific basis for establishing a novel commodity sp

关键词： Astragali Radix Growth rings Chemical analysis Anti-heart failure

Unique Structure and Mechanical Property of Dabryanus Scale

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Journal of Bionic Engineering 2016年第4期13卷 641-649页

作者： mei Yu Haoran liu Jianhua liu Songmei Li School of Materials Science and Engineering Beihang University Beijing 100191 China

The structure and mechanical property of Dabryanus scale were investigated. Environmental Scanning Electron Micros- copy （ESEM） and Transmission Electron Microscopy （TEM） were used to observe the scale structure. The scale has a discrete osseous layer which is composed of boat-like unit （due to the shape）. The osseous layer is embedded into fibrillary layer, and the largest thickness ratio of osseous layer to fibrillary layer is about 7, much higher than those of other reported fish scales. Nanoindentation test was used to investigate mechanical property of the scale. Elastic modulus （E,） and hardness （H） of Dabryanus scale are much lower than those of other reported fish scales. Scale models were proposed and the principles of materials mechanics were used to analyze the mechanical properties of the Dabryanus scale. The boat-like unit in osseous layer makes the scale flexible while keeping a high thickness ratio of osseous layer to fibrillary layer, which increases the flexibility and protection capacity of the scale This study may provide new strategy for the design of flexible armor or flexible devices.

关键词： biological materials microstructures flexibility Dabryanus scale nanoindentation structure-property relationship

SQSTM1/p62 regulate breast cancer progression and metastasis by inducing cell cycle arrest and regulating immune cell infiltration

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Genes & Diseases 2022年第5期9卷 1332-1344页

作者： Jia-Long Qi Jin-Rong He Cun-Bao liu shu-mei Jin Xu Yang Hong-mei Bai Yan-Bing Ma Institute of Medical Biology Chinese Academy of Medical Sciences and Peking Union Medical CollegeKunmingYunnan 530102PR China Kunming Medical University Institute of Medical BiologyKunmingYunnan 650500PR China Yunnan Institute of Materia Medical Department of PathologyKunmingYunnan 650111PR China

The autophagy adaptor protein SQSTM1/p62 is overexpressed in breast cancer and has been identified as a metastasis-related ***,the mechanism by which SQSTM1/p62 contributes to breast cancer progression and tumor microenvironment remains *** study revealed that silencing SQSTM1/p62 expression suppressed breast cancer progression via regulating cell proliferation and reshaping the tumor microenvironment(TME).Here,we found that SQSTM1/p62 was overexpressed in multiple human cancer tissue types and that was correlated with poor patient overall survival(OS)and disease-free survival(DFS).Moreover,we found that short-hairpin RNA(shRNA)-mediated knockdown of p62 expression significantly inhibited cell proliferation,migration,and invasion,and promoted cell death in vitro,as well as suppressed breast cancer growth and lung metastasis in *** addition,flow cytometry analysis of splenocytes and tumor infiltrating lymphocytes(TILs)indicated that the numbers of CD8α+interferon(IFN)-γ+cells(CTLs)and CD4+IFN-γ+(Th1)cells were increased while those of CD4+IL-4+(Th2)cells,tumor-associated macrophages(TAMs)and myeloid-derived suppressor cells(MDSCs)were ***-PCR analyses showed that the gene expression of Th1/Th2 cytokines changed in the tumor *** SQSTM1/p62 suppressed tumor cell lung ***,our results provide strong evidence that silencing tumor cell SQSTM1/p62 inhibited tumor growth and metastasis through cell cycle arrest and TME *** finding provides a novel molecular therapeutic strategy for breast cancer progression and metastasis treatment.

关键词： Breast cancer Cell cycle Metastasis SQSTM1/p62 Tumor microenvironment