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| 1 | Determining method,conditional factors,traits and applications of nonlinear chemical fingerprint by using dissipative components in samples显示文摘The thermodynamic systems and dynamic model suitable for determining the nonlinear chemical fingerprints of samples were analyzed.The results indicated that the damp nonlinear chemical reactions in close systems away from the equilibrium and open systems without the complementarity of the dissipation substances have important significance for the throng characterization and whole content analysis of chemical components in samples.Various factors influencing on nonlinear chemical fingerprint,such as reactant species and their concentrations,electrode types,temperature,stir rate,the sort,dosage and granularity of the sample,etc.were amply researched by a nonlinear chemistry reaction,namely,damp B-Z oscillation which used acetone and glucose as the main dissipative substances.In addition,the quantitative information on the whole of chemical components in samples and the traits and applications of the fingerprint were investigated.The method and its important conditions for determining nonlinear chemistry fingerprint used in distinguishing and evaluating complex samples were successfully put forward. | ZHANG TaiMing ZHAO Zhe FANG XuanQi QIAO JunXi XIANG FengQin ZHU Rong LIANG YiZeng DING Feng | 2012 | Science China Chemistry2012，55，2： | 16 |
| 2 | Principle of nonlinear chemical fingerprint by using dissipative components in samples as well as calculation and evaluation of similarity显示文摘Under the conditions of constant temperature and pressure,different influences of samples with different chemical components on the mechanism of nonlinear chemical reaction will cause different changes of the potential-time relationship curve of the nonlinear chemical reaction system.Using it as the character,and using the B-Z nonlinear chemical system to use acetone and substrates in samples as main dissipative substances qua an example,the principle of nonlinear chemical fingerprint has been researched and discussed in detail.At the same time,the general method for calculating the system similarity about nonlinear chemical fingerprint was also put forward,and similarities of nonlinear chemistry fingerprints of different batches of Guhan Yangshengjing and 18 sorts of other samples were calculated by Euclidean distance,correlation coefficient,included angle cosine and system similarity,at the same time,the various similarities were analyzed.The results showed that,both of correlation coefficient and included angle cosine are unable to be used as the criterion for quantitatively evaluating the similarity of nonlinear chemistry fingerprint;as non-parametric similarity,Euclidean distance can accurately reflect the feature differences in the fingerprints,but as parametric similarity,sometimes,Euclidean distance can not accurately reflect the relative extent of characteristic difference in the nonlinear chemical fingerprints;system similarity can most truthfully reflect the characteristic difference in the nonlinear chemical fingerprints,and is the best evaluating method among the four ones.Therefore,system similarity can be used to quantitatively calculate the similar extent between the nonlinear chemical fingerprints.An economical,simple and convenient,easy pushing and effective method for identifying and evaluating complicated samples has successfully been put forward. | ZHANG TaiMing ZHAO Zhe FANG XuanQi QIAO JunXi XIANG FengQin ZHU Rong LIANG YiZeng DING Feng | 2012 | Science China Chemistry2012，55，2： | 13 |
| 3 | Building Osteogenic Microenvironments with a Double-Network Composite Hydrogel for Bone Repair显示文摘The critical factor determining the in vivo effect of bone repair materials is the microenvironment,which greatly depends on their abilities to promote vascularization and bone formation.However,implant materials are far from ideal candidates for guiding bone regeneration due to their deficient angiogenic and osteogenic microenvironments.Herein,a double-network composite hydrogel combining vascular endothelial growth factor(VEGF)-mimetic peptide with hydroxyapatite(HA)precursor was developed to build an osteogenic microenvironment for bone repair.The hydrogel was prepared by mixing acrylatedβ-cyclodextrins and octacalcium phosphate(OCP),an HA precursor,with gelatin solution,followed by ultraviolet photo-crosslinking.To improve the angiogenic potential of the hydrogel,QK,a VEGF-mimicking peptide,was loaded in acrylatedβ-cyclodextrins.The QK-loaded hydrogel promoted tube formation of human umbilical vein endothelial cells and upregulated the expression of angiogenesis-related genes,such as Flt1,Kdr,and VEGF,in bone marrow mesenchymal stem cells.Moreover,QK could recruit bone marrow mesenchymal stem cells.Furthermore,OCP in the composite hydrogel could be transformed into HA and release calcium ions facilitating bone regeneration.The double-network composite hydrogel integrated QK and OCP showed obvious osteoinductive activity.The results of animal experiments showed that the composite hydrogel enhanced bone regeneration in skull defects of rats,due to perfect synergistic effects of QK and OCP on vascularized bone regeneration.In summary,improving the angiogenic and osteogenic microenvironments by our double-network composite hydrogel shows promising prospects for bone repair. | Jiaying Li Jinjin Ma Qian Feng En Xie Qingchen Meng Wenmiao Shu Junxi Wu Liming Bian Fengxuan Han Bin Li | 2023 | Research2023，，3： | 3 |
| 4 | Converting Layered Zinc Acetate Nanobelts to One-dimensional Structured ZnO Nanoparticle Aggregates and their Photocatalytic Activity显示文摘 | Ye Zhang Feng Zhu Junxi Zhang Lingli Xia | 2008 | Nanoscale Research Letters2008，，6： | 1 |
| 5 | Negotiating place and identity after change of administrative division 显示文摘 | Zhu Hong Qian Junxi Feng Lei | 2011 | Social and Cultural Geography2011，12，2： | 1 |
| 6 | Tourism-driven urbanization in China’s small town development: A case study of Zhapo Town, 1986–2003显示文摘 | Junxi Qian Dan Feng Hong Zhu | 2011 | Habitat International2011，，1： | 1 |
| 7 | Tourism-driven urbanization in China’s small town development:a case study of Zhapo town,1986-2003显示文摘 | JUNXI QIAN DAN FENG | 2012 | Habitat International2012，，1： | 1 |
| 8 | 海底水合物区或存在大量以往被忽视的深部来源甲烷显示文摘量化天然气水合物富集区海底硫酸盐还原速率和甲烷氧化速率对了解海洋碳、硫循环至关重要.以南海北部神狐海域为例,基于实测的大面积(达5.2 10^(11)km^(2))、多站位(85个)海底表层沉积物硫酸盐浓度剖面,我们获得的区域硫酸盐还原速率为5.39 10^(11)mmol a^(-1).该值明显高于前人利用沉积速率估算的区域硫酸盐还原速率(3.52 10^(11)mmol a^(-1)).有意思的是,两种不同方法获得的区域硫酸盐还原速率的差值(1.87 10^(11)mmol a^(-1))恰好能限定来自深部地层中的甲烷通量大小.据此,我们认为以往海底表层沉积环境区域、乃至全球的硫酸盐还原速率可能被较大程度低估.研究同时突显了海底水合物和甲烷渗漏区表层硫酸盐消耗的甲烷相当一部分来自深部地层,而非原地有机质产甲烷形成.今后在进行精确评估全球海底硫酸盐还原和甲烷氧化速率以及水合物资源环境效应时须充分考虑海底深部甲烷的贡献. | Yu Hu Xinxin Zhang Dong Feng Jörn Peckmann Junxi Feng Hongbin Wang Shengxiong Yang Duofu Chen | 2022 | Science Bulletin2022，67，2： | 0 |
| 9 | The crucial role of deep-sourced methane in maintaining the subseafloor sulfate budget显示文摘Methane(CH4)is a powerful greenhouse gas and its largest reservoir on Earth is held in marine sediments.CH4 in marine sediments is mainly stored in gas-hydrate reservoirs and deep sedimentary strata along continental margins,where large amounts of deep-sourced CH4 ascend to different degrees toward the seafloor.However,the amount of deep-sourced CH4 and its role in subseafloor carbon and sulfur cycling remains poorly constrained.We analyzed sulfate(SO_(4)^(2-))profiles of 157 sites along with previous published 85 sites to determine the regional distribution and amount of SO_(4)^(2-) reduction for an area of 1.23×10^(5) km^(2) of the northern South China Sea.Then we compared these obtained results with estimates based on sedimentation rates from the same area.Significantly higher regional SO_(4)^(2-) flux estimates based on SO_(4)^(2-) profiles(4.26×10^(-3)Tmol a^(-1)),compared to lower estimates based on sedimentation rates(1.23×10^(-3)Tmol a^(-1)),reflect abundant ascending deep-sourced CH4.The difference of the regional SO_(4)^(2-) flux estimates(3.03×10^(-3)Tmol a^(-1))represents the amount of SO_(4)^(2-) reduced by CH_(4) through the anaerobic oxidation of CH_(4)(AOM).Deep-sourced CH_(4) contributes 71%to total SO_(4)^(2-) consumption in the study area,largely exceeding SO_(4)^(2-) consumption by organoclastic sulfate reduction.Our findings substantiate that deep-sourced CH4 governs subseafloor carbon and sulfur cycling to a previously underrated extent,fueling extensive chemosynthesis-based ecosystems along continental slope and rise. | Yu Hu Dong Feng Jörn Peckmann Xinxin Zhang Linying Chen Junxi Feng Hongbin Wang Duofu Chen | 2023 | Geoscience Frontiers2023，14，3： | 0 |
| 10 | Mg/Ca,Ba/Ca,and S/Ca ratios as environmental and growth proxies for bivalve shells from the Haima cold seep,South China Sea显示文摘Bivalve shell fossils,cemented by authigenic carbonates,are widely spread in the Haima cold seep,Qiongdongnan Basin of the South China Sea(SCS).In this study,we examined an element profile of Gigantidas platifrons in the Haima cold seeps at a water depth of 1381 m.Based on the scanning electron microscope(SEM)analyses,the prismatic layer and nacreous layer were identified,which are characterized by prismatic structure and stratified structure,respectively.In addition,the profile can be subdivided into two parts:altered and unaltered zones.Laser inductively coupled plasma mass spectrometry(LA-ICP-MS)mapping shows that the element concentrations of the altered zones were influenced by the authigenic carbonate rocks,whereas the element concentrations of unaltered zones remain stable.In-situ X-ray diffraction(XRD)analyses show that the mineral constituent of the prismatic layer is mainly composed of aragonite.Along with the growth profile,Mg/Ca ratios of unaltered zones have minor variations,ranging 0.72-0.97 mmol/mol(mean=0.87 mmol/mol),with estimated temperatures of 3.8-4.1℃,indicating that the temperature of the surrounding seawater remains constant and agree with the measured data of 3.9℃which was conducted by a conductivity-temperature-depth system(CTD).The minor variations of Ba/Ca ratios(0.01-0.06 mmol/mol;mean=0.04 mmol/mol)indicate a relatively stabilized salinity of the surrounding seawater.S/Ca ratios show large variations of 0.04-4.15 mmol/mol(mean=1.37 mmol/mol).S/Ca ratios have regular variations which generally correspond to the variations of the Mg/Ca ratios,highlighting that the S/Ca ratios of bivalve shells show the potential to reflect the growth rate of the Gigantides.However,further studies should be carried out on the understanding of the links between the S/Ca ratios and seepage intensity of cold-seep fluids. | Jingya CAO Shengxiong YANG Danling TANG Junxi FENG Jinqiang LIANG | 2023 | Journal of Oceanology and Limnology2023，41，2： | 0 |
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