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Global Geology 2013年第3期16卷 159-163页

作者： xu xiaohui CHEN Hui'e WANG Gangcheng College of Construction Engineering Jilin University

On the basis of geological investigating work and experimental studies on slide zone soil of one landslide in Tibet,the authors analyzed granulometric composition,clay mineral composition and physical and mechanical properties for the soil in the slide *** soil samples are gravel containing fine *** larger than 2 mm occupy the main proportion with the content 51.5%--68.5%.The relative content of clay minerals is *** clay minerals are illite smectite mixed layer and kaolinite,and their relative contents are 6%--13% and 4%-11%,*** main mineral ingredient is quartz and the relative content is over 30%.Therefore,the soil’s hydrophily is *** cohesion and internal friction angle are high,causing preferable physical-mechanical features of slide zone *** the basis of the obtained data,the landslide stability is evaluated by means of limit equilibrium *** safety factors are 3.191 and 1.92 respectively under both natural and normal water level *** study results show that the landslide is *** can provide the appropriate basis and reference for landslide stability evaluation and landslide control in Tibet.

关键词： slide zone soil granulometric composition clay mineral composition physical-mechanical proper-ty landslide stability analysis

Effect of Mn^(2+)on the phosphorus removal and bioflocculation under anoxic condition

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Journal of Environmental Sciences 2022年第5期34卷 37-46页

作者： xiaohui xu Lanhe Zhang Xiangdong Zhang xiaohui Guan Dezhou Wei School of Resources&Civil Engineering Northeastern UniversityShenyang 110819China School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China

Manganese ion(Mn^(2+))generated from metallurgical,steel making and chemical industries enters sewage treatment plants and affects the sludge activity and *** effect of Mn^(2+)on the removal of chemical oxygen demand(COD)and total phosphorus(TP)and sludge activity were investigated in anoxic zone of an anaerobic/anoxic/oxic(A2O)*** compositions and structures of extracellular polymeric substances(EPS)were charac-terized using three-dimensional excitation emission matrix fluorescence spectroscopy(3D-EEM),X-ray photoelectron spectroscopy(XPS)and Fourier transform infrared spectroscopy(FTIR)to reveal the relationship among Mn^(2+),EPS and sludge *** results showed thatlow concentration of Mn^(2+)(10 mg/L)hindered microbial flocculation and reduced removal efficiencies of the *** Mn^(2+)was 5 mg/L,removal efficiencies of COD and TP reached 65%and 90%,*** flocculation was the best and SVI was 70.56 mL//*** changes of Mn^(2+)concentration caused deviation of groups'compositions in LB-EPS and TB-EPS,where the main components were always protein(PN)and polysaccharide(PS).The addition of Mn^(2+)resulted in the degradation of humic ***,it did not give rise to significant morphology changes of EPS.

关键词： Mn^(2+) Wastewater Anoxic sludge Extracellular polymeric substances (EPS) Flocculation

Thermodynamics and Kinetics of Bacterial Cellulose Adsorbing Persistent Pollutant from Aqueous Solutions

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Chemical Research in Chinese Universities 2015年第2期31卷 298-302页

作者： LU Min LU xuan xu xiaohui GUAN xiaohui School of Chemical Engineering Northeast Dianli University Jilin 132012 P. R. China

The adsorption capability of bacterial cellulose（BC） for anionic dye acid fuchsine was studied. Meanwhile, the processes of the adsorption were investignted and fitted by adsorption isotherm models, adsorption thermodynamics and adsorption kinetics models, respectively. The changes of BC before and after adsorbing acid fuchsine were investigated via scanning electron microscopy（SEM） and Fourier transform infrared spectroscopy（FTIR） to further explain the adsorption mechanism. The results show that acid fuchsine could be effectively adsorbed by BC. The adsorption process was fitted well by Langmuir equation and the pseudo-second order kinetics, indicating that the adsorption process was monolayer molecule adsorption with the main action of chemical adsorption. The adsorption process was spontaneous and endothermic. Glucuronic acid groups and hydroxyl groups were responsible for the adsorption of acid fuchsine on BC.

关键词： Adsorption thermodynamics Adsorption kinetics Persistent pollutant Bacterial cellulose

Optimization of Preparation Process for Allylamine-bacterial Cellulose via Graft Copolymerization by Response Surface Methodology

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Chemical Research in Chinese Universities 2014年第3期30卷 527-530页

作者： LU Min A Runa GUAN xiaohui xu xiaohui CUI Yingshengnan GAO Tingting School of Chemical Engineering Northeast Dianli University Jilin 132012 P. R. China

In order to improve the efficiency of new adsorbent, grafting-allylamine bacterial cellulose（al-BC）, response surface methodology（RSM） was used for the optimization of preparation process. Three factors affecting the yield of grafting reaction are the amount of allylamine, the concentration of ceric ammonium nitrate（CAN） and the concentration of nitric acid. Based on the regression coefficient analysis in the Box-Behnken design, a relationship between the preparation variable and grafting yield was obtained. Square error analysis on main factors, and multi-variable interactions were employed for studying grafting yield. The results show that at the conditions of CAN of 23.00 mmol/L CAN, 0.17 mol/L nitric acid, adding an amount of grafting-allylamine bacterial cellulose of 26.49 mL/L made grafting rate reach maximum of 24.25% at 40℃ after the reaction for 4 h. The experimental results are in good agreement with the calculation values via proposed regression equation, indicating that the equation could be used to nredict and optimizate the preparation of grafting al-BC.

关键词： Response surface methodology Allylamine Bacterial cellulose

A new algorithm based on the background field for red tide monitoring in the East China Sea

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Acta Oceanologica Sinica 2014年第5期33卷 62-71页

作者： xu xiaohui PAN Delu MAO Zhihua TAO Bangyi South China Sea Institute of Oceanology Chinese Academy of Sciences State Key Laboratory of Satellite Ocean Environment Dynamics the Second Institute of Oceanography State Oceanic Administration University of Chinese Academy of Sciences

Remote sensing has been proven to be an effective means of monitoring red tides. The spectral information is an important basis for establishing a model to monitor red tides. The spectral curves of red tide events are analyzed and compared with multiyear monthly averaged spectral curves based on MODIS data from July 2002 to June 2012, as well as spectral differences at the same location during red tide presence and absence. A red tide monitoring algorithm is developed based on the background field to extract the red tide information of the East China Sea （ECS）. With the application of the algorithm in the ECS, the results reveal that the developed model can effectively determine the location of red tides, with good correspondence to the results from an official bulletin. This demonstrates that the algorithm can effectively extract the red tide information.

关键词： red tide remote sensing background field East China Sea

Theory and test of underground explosions:Coupling rule between cratering and ground shock

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Underground Space 2024年第4期17卷 146-160页

作者： Wei Guo Jie Li Benjun Shi Tianhan xu xiaohui xu Gan Li Jie Shi State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact Army Engineering University of PLANanjing 210007China

Calculating the parameters of the ground shock induced by an underground explosion is a complex energy coupling *** is difficult to establish a unified ground shock coupling law from limited test *** paper summarizes the research results obtained at home and abroad and systematically analyzes the coupling mechanism of craters formed by an underground explosion and the ground *** differences between the concepts of"closed-explosion critical depth"and"equivalent closed-explosion critical depth"are clearly *** spreading of the ground shock energy is attributed to the explosive expansion of the air cavity,revealing a linear relationship between the volume of the cavity region(or the volume of the crack region)and the ground shock energy associated with the underground *** proportionality factor is related to the mechanical properties of the medium and is independent of the magnitude of the explosion *** on this,a theoretical calculation formula and conversion method for the ground shock coupling coefficient were *** tests were conducted in clay and Plexiglass under varying burial *** test results were consistent with the theoretically calculated *** study provides a theoretical basis for the design of explosion-resistant structures in underground engineering.

关键词： Underground explosion Ground shock coupling Coupling coefficient Equivalent closed explosion Experimental study

Study on the Heat Conduction of Phase-Change Material Microcapsules

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Journal of Thermal Science 2013年第3期22卷 257-260页

作者： Gangtao Zhao xiaohui xu Lin Qiu Xinghua Zheng Dawei Tang Dept. of Pharmacology General Hospital of Beijing Military Command Chinese People's Liberation Army CN 95824 Troop of Chinese People's Liberation Army CN Institute of Engineering Thermophysics Chinese Academy of Sciences

The 3ω approach was used to measure the effective thermal conductivity of phase-change material microcapsules (PCMMs) based on urea formaldehyde and sliced paraffin. The effective thermal conductivities of PCMMs with different densities were measured within the phase-change temperature range. The relationships between effective thermal conductivity, density and temperature were analysed. The effective thermal conductivity reached peak values within the phase-change temperature range and the temperature peak value was consistent with the peak value of the phase-change temperature. The effective thermal conductivity increased with increasing density due to the decreased porosity of samples and their increased solid-phase conduction.

关键词： 3ω-method, Effective thermal conductivity, Phase-change material microcapsules

Establishment and Characterization of a New Marine Fish Cell Line from Ovary of Barfin Flounder(Verasper moseri)

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Journal of Ocean University of China 2015年第6期14卷 1105-1110页

作者： xu xiaohui FAN Tingjun JIANG Guojian YANG Xiuxia College of Marine Life Sciences Ocean University of China

A novel continuous ovary cell line from barfin flounder(Verasper moseri)(BFO cell line) was established with its primitive application in transgenic expression demonstrated in this study. Primarily cultured cells grew well at 22℃ in Dulbecco's modified Eagle medium/F12 medium(DMEM/F12, 1:1; p H 7.2) supplemented with 20% fetal bovine serum(FBS), carboxymethyl chitooligosaccharide, basic fibroblast growth factor(b FGF) and insulin-like growth factor-I(IGF-I). The primary BFO cells in fibroblastic morphology proliferated into a confluent monolayer about 2 weeks later, and were able to be subcultured. Impacts of medium and temperature on the growth of the cells were examined. The optimum growth was found in DMEM/F12 with 20% FBS and at 22℃. The BFO cells can be continuously subcultured to Passage 120 steadily with a population doubling time of 32.7 h at Passage 60. Chromosome analysis revealed that 72% of BFO cells at Passage 60 maintained the normal diploid chromosome number(46) with a normal karyotype of 2st+44t. The results of gene transformation indicated that green fluorescence protein(GFP) positively expressed in these cells after being transformed with pc DNA3.1-GFP. Therefore, a continuous and transformable BFO cell line was successfully established, which may serve as a useful tool for cytotechnological manipulation and transgenic modification of this fish.

关键词： barfin flounder ovary cell cell line gene transformation green fluorescence protein GFP Verasper moseri

Comparative transcriptome analysis of abalone Haliotis discus hannai with green and gray egg colors

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Journal of Oceanology and Limnology 2021年第1期39卷 350-361页

作者： Yanwei FENG Bo YUAN xu JIANG Xiangquan LIU Zan LI Guohua SUN xiaohui xu School of Agriculture Ludong UniversityYantai 264025China Shandong Provincial Key Laboratory of Restoration for Marine Ecology Shandong Marine Resource and Environment Research InstituteYantai 264006China National Demonstration Center for Experimental Fisheries Science Education Shanghai Ocean UniversityShanghai 201306China Shanghai Engineering Research Center of Aquaculture Shanghai Ocean UniversityShanghai 201306China Shandong Rice Research Institute Shandong Academy of Agricultural SciencesJinan 250100China

Haliotis discus hannai is an important marine economic species in *** egg color was found to be associated with economic traits,which provides a new idea for ***,the molecular mechanism of the egg-color formation has not been ***,the pigment composition and comparative transcriptome analyses of *** hannai with green and gray egg color were conducted using high-performance liquid chromatography(HPLC)and RNA-Seq *** show that individuals with green and gray eggs both possess the *** existed in gray-egged individuals,but not in green-egged *** transcriptome analysis,272310 unigenes were received from 461162 transcripts with a mean length of 985 bp and N50 of 1524 bp,respectively.A total of 185 unigenes were identifi ed as diff erentially expressed genes(DEGs).The DEGs involved in“fl avin-containing compound metabolic process”,“melanosome”,“glutathione metabolism”,and“cytochrome b6f complex”were likely related to the formation of the egg *** results provide foundational information for the functional analysis of egg-color related genes and are benefi cial to the selective breeding of *** hannai.

关键词： Haliotis discus hannai egg color high-performance liquid chromatography transcriptome diff erentially expressed genes

2D Ca/Nb-based perovskite oxide with Ta doping as highly efficient H_(2)O_(2)synthesis catalyst

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Nano Research 2024年第6期17卷 4934-4942页

作者： Xingchen Yang Yang Gao xiaohui xu Wenqiang xu Denghui Wang Bin Luo Dong Liu Tao Liang Bin Wang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnologythe University of QueenslandSt LuciaQLD 4072Australia State Key Laboratory of Organic–Inorganic Composites College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China State Key Lab of Silicon Materials Zhejiang UniversityHangzhou 310027China

Perovskite oxides(POs)are emerging as a class of highly efficient catalysts for reducing oxygen to H_(2)*** a rich variety of POs-based catalysts have been developed by tuning the complex composition,a highly efficient PO catalyst that is able to alter the reaction pathway from a 4e−process to a 2e−process for H_(2)O_(2)production has rarely been *** modified the structure and composition of a Ca-and Nb-based PO material by realizing a uniform two-dimensional(2D)morphology and varied Ta doping,resulting in the 2D Ca_(2)Nb_(3−x)Ta_(x)O_(10)−(x=0,0.5,1,and 1.5)monolayer *** obtained catalysts exhibit a dominant 2e−pathway and show exceptional H_(2)O_(2)production *** typical Ca_(2)Nb_(2.5)Ta_(0.5)O_(10)−nanoflakes showed an onset potential of 0.735 V *** hydrogen electrode(RHE),a remarkably high selectivity over 95%across a wide range of 0.3-0.7 V,an impressively high Faradaic efficiency of 94%,and a notable H_(2)O_(2)productivity of 1571 mmol·gcat^(−1)·h^(−1).These findings highlight the great potential of 2D perovskite oxide nanoflakes as advanced electrocatalysts for 2e−oxygen reduction reaction.

关键词： perovskite oxide H_(2)O_(2) two-electron oxygen reduction reaction catalyst Ca_(2)Nb_(3-x)Ta_(x)O_(10)-nanoflakes