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Temporal-Spatial Variability of Soil Organic Carbon Stocks in a Rehabilitating Ecosystem

Pedosphere 2004年第4期14卷 501-508页

作者： zhangshi-rong SUNBo ZHAOQi-Guo XIAOPeng-Fei SHUJian-Ying InstituteofSoilScience ChineseAcademyofSciencesNanjing210008（China）. CollegeofResourcesandEnvironment SichuanAgriculturalUniversityYa＇an625014（China）

In global change research, changes of soil organic carbon (SOC) reservoirs intropical and subtropical regions are still unknown. The temporal-spatial variability of SOC stockswas determined in a basin of over 579 km^2 in subtropical China from 1981to 2002. ArcGIS8.l softwarewas utilized for spatial analysis of semivariance, ordinary kriging (OK), and probability kriging(PK). Grid and hierarchical approaches were employed for the sampling scenario in 2002 with 106Global Position System (GPS) established spots sampled. Bulk topsoil samples (0—30 cm) werecollected at three random sites on each spot. The SOC content for 1981 came from the SOC map of theSecond National Soil Survey. Geostatistical results of the nugget to sill ratio (0.215-0.640)in therehabilitating ecosystem indicated a moderate spatial dependence for SOC on this large scale. Therange of SOC changed from 2.04 km in 1981 to 7.15 km in 2002. The mean topsoil SOC increased by 4.6%from 10.63 g kg^(-1) (1981) to 11.12 g kg^(-1)(2002). However, during this 21-year period 25.2% ofthe total basin area experienced a decrease in SOC. Also, the probability kriging results showedthat the geometric mean probabilities of SOC 15.0 gkg^(-1) were 0.188, 0.534 and 0.378, respectively in 2002, comparing to 0.234, 0.416 and 0.234 inthat order in 1981, respectively. The SOC storage in the topsoil increased by 17.0% during this timewith the main increase occurring in forests and cultivated land,which amounted to 82.5% and 17.0%of the total increase, respectively.

关键词： ordinary kriging probability kriging rehabilitating ecosystem soil organiccarbon temporal-spatial variability

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河北曲周土壤氮素养分的时空变异特征

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土壤学报 2003年第3期40卷 475-479页

作者：张世熔黄元仿李保国张凤荣胡克林中国农业大学资源与环境学院

近20年来随着区域人口的增加、盐渍地的改良与综合治理，黄淮海冲积平原区农业集约化程度不断提高，但农业灾害的类型却从过去的以旱涝为主转向以旱为主，地下水位明显降低。因此，研究农业集约化程度和气候环境条件的变化对土壤质量演... 详细信息

近20年来随着区域人口的增加、盐渍地的改良与综合治理，黄淮海冲积平原区农业集约化程度不断提高，但农业灾害的类型却从过去的以旱涝为主转向以旱为主，地下水位明显降低。因此，研究农业集约化程度和气候环境条件的变化对土壤质量演变的影响是该区农业持续发展面临的重要课题

关键词：土壤氮素养分时空变异特征河北曲周耕层全氮有效氮土壤肥力

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MULTI-VALUED QUASI VARIATIONAL INCLUSIONS IN BANACH SPACES

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Applied Mathematics and Mechanics(English Edition) 2004年第6期25卷 627-635页

作者： zhangshi-sheng DepartmentofMathematics YibinUniversityYibinSichuan644007P.R.China

The purpose is to introduce and study a class of more general multivalued quasi variational inclusions in Banach spaces. By using the resolvent operator technique some existence theorem of solutions and iterative approximation for solving this kind of multivalued quasi variational inclusions are established. The results generalize, improve and unify a number of Noor's and others' recent results.

关键词： multivalued quasi variational inclusion variational inequality algorithm resolvent equation m-accretive mapping accretive mapping

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Efficient and simple synthesis of B_(2)O_(3)-Al_(2)O_(3)nanocomposites assisted by deep eutectic solvent for production of 5-hydroxymethylfurfural from glucose

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Nano Research 2025年第1期18卷 236-248页

作者： Yuchen Wang Kai rong Shanlei Chang Youxing Fang Shaojun Dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China College of Chemistry Jilin UniversityChangchun 130012China

The catalytic conversion of glucose to high valueadded platform chemical 5-hydroxymethylfurfural(HMF)is a promising biorefinery process,and alumina-boria catalysts are considered to be green and mild solid acid catalysts for this catalytic ***,compared to the common synthesis methods with complicated steps,we reported a simple and efficient strategy to prepare B_(2)O_(3)-Al_(2)O_(3)nanocomposites by calcining cost-effective glucose-urea deep eutectic solvent(DES)solution containing the *** prepared B_(2)O_(3)-Al_(2)O_(3)nanocomposites exhibited an open three-dimensional skeleton and two-dimensional porous lamellar substructure,endowing them with a high specific surface area(228.27 m2/g).The introduction of boron changed the ratios of different aluminum species(AlⅣ,AlⅤ,and AlⅥ)and borate species(BO3 and BO4),thus further affecting the acidity and the types of acid sites of the *** prepared B_(2)O_(3)-Al_(2)O_(3)bifunctional acid catalysts possessing abundant Lewis acid sites and adjustable Brønsted acid sites showed complete glucose conversion and 55.38%of HMF yield under the optimum *** study proposed a concise method to synthesize alumina-boria solid acid catalysts assisted by glucose-urea *** hope to extend the application and prospect of this efficient and simple synthesis strategy.

关键词： 5-hydroxymethylfurfural(HMF) deep eutectic solvent glucose alumina-boria acid catalyst

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FUZZY COMPREHENSIVE EVALUATION OF CONTAINER TRANSPORTATION MODES ALONG THE CHANGJIANG RIVER MAIN LINE AND ITS DELTA AREA

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Chinese Geographical Science 2003年第3期13卷 259-261页

作者： zhangshi-yu XIAOHan-liang SchoolofTransportation WuhanUniversityofTechnologyWuhan430063P.R.China SchoolofEnergyandPowerEngineering WuhanUniversityofTechnologyWuhan430063P.R.China

The Changjiang River (Yangtze) is one of the fastest growth areas of container transportation in China. Rail, road and water transportation have competed against each other for container transportation in the Chang-jiang River main line and its delta area. It is of significance to assess these different transportation modes scientifically in order to organize container transportation efficiently in this area and make decision for integral plan and construction of transportation system in this area. This paper outlines application of fuzzy comprehensive evaluation to appraise different modes of typical direction of containers. Twelve assessment indexes were decided. Membership functions were formulated. Evaluation results indicated that road transportation was optimal mode in the Changjiang River delta area, however water transportation was the primary way in the Changjiang River main line.

关键词： container transportation mode fuzzy comprehensive evaluation assessmentindex the changjiang river main line and its delta area

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Annealing behavior of ultrathin Mo layer located at interface or on surface of Ti-Si system

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Nuclear Science and Techniques 2001年第3期12卷 183-189页

作者： ZHANGZhi－Bin zhangshi－Li LaboratoryofNuclearAnalysesandTechniques ShanghaiInstituteofNuclearResearchTheChineseAcademyofSciencesShanghai201800 KungligaTekniskaHoegskolan DepartmentofElectronicsElectrum22

Annealing behavior, at different annealing temperatures, of an ultrathin Mo layer located between a Ti film and Si substrate or deposited on the top of sur -face of a Ti film was investigated by Rutherford baccscattering spectrometry (RBS), cross-sectional transmission electron microscopy (TEM) and energy dispersive X-ray spectrometry (EDS). In a Ti/Mo/Si structure, partially reacted film with layer struc- ture of Ti-rich silicide/TiSi2/(Mo, Ti)Si2 on a Si substrate was formed after 550℃ annealing for 30 min. The ratio of Mo to Ti in (Mo, Ti)Si2 layer decreases from ncar Si substrate upwards and becomes zero at about 20 nm away. In a Mo/Ti/Si structure, the surface Mo layer enhances the Si diffusion from the substrate during annealing. Mo bearing Ti rich silicide exists on the surface until 600℃ and then converts to (Mo, Ti)Si2 after 6500C annealing, and the atomic ratio of Mo to Ti decreases from the top surface into Ti silicide film, and becomes zero at about 30 nm away from the surface. In both cases of interface Mo and surface Mo layer, the atomic ratio of Mo to Ti in the region of (Mo, Ti)Si2 was found to be very low, with an average value of less than 0.2. Low content of Mo in Mo containing ternary *** leads easily to the formation of the stable phase of C54 (Mo, Ti)Si2, which acts as a templatc for the formation of C54 TiSi2 beneath when Mo is deposited on the surface.

关键词：钼薄膜退火行为 Ti-Si系统

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Investigation on the strain of SiGe/Si heteroepitaxial system during high temperature annealing byBiBS/Channeling

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Nuclear Science and Techniques 2001年第4期12卷 295-301页

作者： CHENChang－Chun zhangshi－Li LaboratoryofNuclearAnalysesandTechniques ShanghaiInstituteofNuclearResearchtheChineseAcademyofSciencesShanghai201800 KungligaTekniskaHoegskolan DepartmentofElectronicsElectrum22

The influence of the high temperature processing on the strain stored in SiGe hetero-epilayer was studied by means of RBS/Channeling. Channeling angular scan along the , axial direction in the (100) plane was used to characterize the tetragonal distortion in the SiGe strained layer. The strained crystal structure parameters were acquired by combining the determination of strain with the elasticity theory. It is shown that the strain stored in the SiGe epilayer has significantly change (relaxation factor from 0.023 to 0.84) after high temperature annealing. The potential strain relaxation mechanisms were discussed.

关键词：合金薄膜高温退火集成电路

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In situ IR, pulse reaction and TPD-ITD study of catalytic performance of room-temperature carbon monoxide oxidation on supported gold catalysts

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Journal of Environmental Sciences 2002年第4期14卷 489-494页

作者： HAOZheng-ping zhangshi-chao LIUZhi-ming ZHANGHui-ping ResearchCenterforEco-EnvironmentalSciences ChineseAcademyofSciencesBeijing100085China DepartmentofMaterialScience＆Engineering BeijingUniversityofAeronauticsandAstronauticsBeijing100083China DepartmentofChemicalEngineering XiamenUniversityXiamen361005China

With in situ IR, two different CO adsorption bands were detected on various chemical state gold catalysts. One band is attributed to the linear CO on an oxidized gold catalyst(2100 cm -1 ), the other one is ascribed to the bridged CO on metallic gold (2085 cm -1 ). CO pulse reaction showed that Au/Fe 2O 3 catalyst had a room temperature activity even in the presence of moisture. The produced CO 2 was detained and more easily desorbed from supported gold catalyst than support oxide. TPD IDT results indicated that the O - 2 superoxide ions are the possible active oxygen species.

关键词： supported gold catalyst room temperature CO oxidation pulse reaction TPD ITD technique

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Coexistance of C40 and C54 TiSi_2 during the solid statereaction of Ti/Mo/Si system

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Nuclear Science and Techniques 2002年第1期13卷 19-24页

作者： ZHANGZhi－Bin zhangshi－Li 等 LaboratoryofNuclearAnalysesandTechniques ShanghaiInstituteofNuclearResearctheChineseAcademyofSciencesShanghai201800 KungligaTekniskaHoegskolan DepartmentofElectronicsElectrum229

The effect of a 0.9 nm Mo interlayer at the interface of Ti film deposited on a Si substrate on phase formation of TiSi2 during annealing has been studied by using transmission electron micro-diffraction technique. When Ti/Mo/Si was an- nealed at low temperature as 550℃ for 30 mm in Ar ambient, a metastable phase. i.e., hexagonal C40 TiSi2, and the equilibrium phase. i.e., orthorhombic C54 TiSi2, were both detected. The experimental patterns of the C40 and C54 compare well with the simulated ones.

关键词：钛薄膜硅衬底 TiSi2相电子衍射

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Inhibiting ceramide synthase 5 expression in microglia decreases neuroinflammation after spinal cord injury

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Neural Regeneration Research 2025年第10期20卷 2955-2968页

作者： Wei Zhang Yubao Lu Ruoqi Shen Yingjie Wu Chenrui Liu Xingxing Fang Liangming Zhang Bin Liu Limin rong Department of Spine Surgery The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina National Medical Products Administration(NMPA)Key Laboratory for Quality Research and Evaluation of Cell Products GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina

Microglia,the resident monocyte of the central nervous system,play a crucial role in the response to spinal cord ***,the precise mechanism remains *** investigate the molecular mechanisms by which microglia regulate the neuroinflammatory response to spinal cord injury,we performed single-cell RNA sequencing dataset analysis,focusing on changes in microglial *** found that the MG1 subpopulation emerged in the acute/subacute phase of spinal cord injury and expressed genes related to cell pyroptosis,sphingomyelin metabolism,and neuroinflammation at high ***,we established a mouse model of contusive injury and performed intrathecal injection of siRNA and molecular inhibitors to validate the role of ceramide synthase 5 in the neuroinflammatory responses and pyroptosis after spinal cord ***,we established a PC12-BV2 cell co-culture system and found that ceramide synthase 5 and pyroptosis-associated proteins were highly expressed to induce the apoptosis of neuron *** ceramide synthase 5 expression in a mouse model of spinal cord injury effectively reduced ***,ceramide synthase 5-induced pyroptosis was dependent on activation of the NLRP3 signaling *** ceramide synthase 5 expression in microglia in vivo reduced neuronal apoptosis and promoted recovery of neurological ***2g7 formed a“bridge”between sphingolipid metabolism and ceramide synthase 5-mediated cell death by inhibiting the NLRP3 signaling ***,these findings suggest that inhibiting ceramide synthase 5 expression in microglia after spinal cord injury effectively suppressed microglial pyroptosis mediated by NLRP3,thereby exerting neuroprotective effects.

关键词： ceramide synthase 5 gasdermin D microglia neuroinflammation NLRP3 nuclear factor kappa B Pla2g7 pyroptosis sphingomyelin metabolism spinal cord injury

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