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Bioremediation of Hexavalent Chromium Pollution by Sporosarcina saromensis M52 Isolated from Offshore Sediments in Xiamen, China

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Biomedical and Environmental Sciences 2016年第2期29卷 127-136页

作者： ZHAO ran WANG Bi CAI Qing tao LI Xiao Xia LIU Min HU Dong GUO Dong Bei WANG Juan FAN Chun School of Public Health Xiamen University Xiamen 361102 Fujian China State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics Xiamen 361102 Fujian China Shanghai Jinshan District Center for Disease Control and Prevention Shanghai 201599 China Department of Preventive Medicine Xiamen Medical School Xiamen 361008 Fujian China

Objective Cr（VI） removal from industrial effluents and sediments has attracted the attention of environmental researchers. In the present study, we aimed to isolate bacteria for Cr（VI） bioremediation from sediment samples and to optimize parameters of biodegradation. Methods Strains with the ability to tolerate Cr（VI） were obtained by serial dilution and spread plate methods and characterized by morphology, 16 S r DNA identification, and phylogenetic analysis. Cr（VI） was determined using the 1,5-diphenylcarbazide method, and the optimum p H and temperature for degradation were studied using a multiple-factor mixed experimental design. Statistical analysis methods were used to analyze the results. Results Fifty-five strains were obtained, and one strain（Sporosarcina saromensis M52; patent application number： 201410819443.3） having the ability to tolerate 500 mg Cr（VI）/L was selected to optimize the degradation conditions. M52 was found be able to efficiently remove 50-200 mg Cr（VI）/L in 24 h, achieving the highest removal efficiency at p H 7.0-8.5 and 35 °C. Moreover, M52 could completely degrade 100 mg Cr（VI）/L at p H 8.0 and 35 °C in 24 h. The mechanism involved in the reduction of Cr（VI） was considered to be bioreduction rather than absorption. Conclusion The strong degradation ability of S. saromensis M52 and its advantageous functional characteristics support the potential use of this organism for bioremediation of heavy metal pollution.

关键词： Hexavalent chromium Sediment Sporosarcina saromensis Degradation

Major complications after radiofrequency ablation for liver tumors:Analysis of 255 patients

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World Journal of Gastroenterology 2009年第21期15卷 2651-2656页

作者： Wen-tao Kong Wei-Wei Zhang Yu-Dong Qiu Tie Zhou Jun-Lan Qiu Wei Zhang Yi-tao Ding Department of Hepatobiliary Surgery Drum Tower Hospital Medical College of Nanjing University Nanjing 210008 Jiangsu Province China

AIM:To investigate the major complications after radiofrequency ablation(RFA) for the treatment of liver tumors and analyze possible risk factors that precipitate these ***:From March 2001 to April 2008,255 patients with liver tumors(205 male,50 female;age range,18-89 years;mean age,56.0 years) who received RFA were enrolled in this *** these patients,212 had hepatocellular carcinoma,39 had metastatic liver tumors and four had cholangiocellular *** hundred and forty eight patients had a single tumor,and 107 had multiple *** diameter of the tumors ranged 1.3-20 cm(mean,5.1 cm).All patients were treated with a cooled-tip perfusion electrode attached to a radiofrequency generator(Radionics,Burlington,MA,USA).RFA was performed via the percutaneous approach(n = 257),laparoscopy(n = 7),or open surgical treatment(n = 86).The major complications related to RFA were *** resultant data were analyzed to determine risk factors associated these ***:Among the 255 patients,425 liver tumors were treated and 350 RFA sessions were ***-seven(10%) major complications were observed which included 13 cases of liver failure,10 cases of hydrothorax requiring drainage,three casesof tumor seeding,one case of upper gastrointestinal bleeding,one case ofintrahepatic abscess,one case of bile duct injury,one case of cardiac arrest,and five cases of *** patients had more than two *** failure was the most severe complication and was associated with the highest *** patients died due to worsening liver ***-Pugh classification(P = 0.001) and choice of approach(P = 0.045) were related to post-treatment liver failure,whereas patient age,tumor size and number were not significant factors precipitating this ***:RFA can be accepted as a relatively safe procedure for the treatment of liver ***,attention should be paid to possible com

关键词： Complication Hepatocellular carcinoma Metastatic liver tumor Radiofrequency ablation Liverfailure

Transcriptomic insights into growth promotion effect of Trichoderma afroharzianum TM2-4 microbial agent on tomato plants

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Journal of Integrative Agriculture 2021年第5期20卷 1266-1276页

作者： ZHAO Juan LIU Ting LIU Wei-cheng ZHANG Dian-peng DONG Dan WU Hui-ling ZHANG tao-tao LIU De-wen Institute of Plant and Environment Protection Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China

Plant growth promoting fungi are receiving increased attention as valuable beneficial microorganisms in crop cultivation due to their capacity to produce bioactive substances,promote plant growth and enhance immune defense *** this study,a novel Trichoderma isolate,designated as TM2-4,was screened from healthy tomato rhizosphere soil and identified as Trichoderma *** filtrate of the isolate TM2-4 displayed obvious bioactive substance production and an evident effect in promoting tomato seed germination,with hypocotyl length,radical length and vigor index increased by 28.7,19.4 and 62.1%,respectively,after a 100-fold dilution *** assess the promotion effect and related mechanism of isolate TM2-4,the plant biological indexes and gene expression profiles of tomato plants treated with or without *** TM2-4 microbial agent were investigated by greenhouse pot experiment and RNA *** results demonstrated that *** TM2-4 significantly promoted tomato plant growth in terms of plant height,dry weight,number of leaves per plant and root activity,through efficient colonization in the rhizosphere and root system of the *** analyses identified a total of 984 differentially expressed genes in *** microbial agent inoculated tomato roots,which were mainly engaged in the biological process of phytohormone homeostasis,antioxidant activity,as well as metabolic pathways including phenylpropanoid biosynthesis and glutathione *** findings provide useful information for understanding the mechanism of isolate TM2-4 for tomato plant growth promotion,which would facilitate further development of *** TM2-4 microbial agent for use in vegetable crop production.

关键词： Trichoderma afroharzianum Solanum lycopersicum L. plant growth promotion transcriptome analyses qRTPCR

LungPro导航系统引导支气管镜确诊肺外周空洞型鳞癌合并曲霉感染1例

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中华结核和呼吸杂志 2024年第8期47卷 785-787页

作者：蔺晨安然王世寿冯涛山东省东营市胜利油田中心医院呼吸与危重症医学科东营257000

虚拟支气管镜导航(VBN)被逐步应用于肺外周病变的诊断中,它能精准引导支气管镜快速达到目标病变,提高诊断的阳性率。本文报道1例因咯血入院患者,院外临床诊断肺鳞癌并颅脑、骨转移,既往未获取肺内病变组织,入院后应用LungPro导航系统引... 详细信息

虚拟支气管镜导航(VBN)被逐步应用于肺外周病变的诊断中,它能精准引导支气管镜快速达到目标病变,提高诊断的阳性率。本文报道1例因咯血入院患者,院外临床诊断肺鳞癌并颅脑、骨转移,既往未获取肺内病变组织,入院后应用LungPro导航系统引导行支气管镜下肺实质结节抵达术(BTPNA),通过肺组织病理学及肺泡灌洗液病原学检查确诊肺外周空洞型鳞癌合并曲霉感染,给予抗真菌及抗肿瘤治疗后,症状改善出院。

关键词：支气管镜肺内病变曲霉感染入院患者肺泡灌洗液肺鳞癌空洞型临床诊断

The Finite-time Ruin Probability for the Jump-Diffusion Model with Constant Interest Force

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Acta Mathematicae Applicatae Sinica 2006年第1期22卷 171-176页

作者： tao Jiang Hai-feng Yan School of Finance Nanjing University of Finance and Economics Nanjing 210003 China

In this paper, we consider the finite time ruin probability for the jump-diffusion Poisson process. Under the assurnptions that the claimsizes are subexponentially distributed and that the interest force is constant, we obtain an asymptotic formula for the finite-time ruin probability. The results we obtain extends the corresponding results of Kliippelberg and Stadtmüller and Tang.

关键词： Finite time ruin probability jump-diffusion Poisson process constant interest force subexpential class

Cellulose Nanocrystals-based Chiroptical Materials

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Paper And Biomaterials 2020年第3期5卷 14-30页

作者： Jiawei tao Yan Xu State Key Laboratory of Inorganic Synthesis&Preparative Chemistry Jilin UniversityChangchunJilin Province130012China

Chiroptical materials are widely used in photonic devices,enantioselective catalysis and ***-base chiroptical materials with multilength scale structural hierarchy and unique light manipulation ability found in nature provide inspiration for materials *** nanocrystals(CNC)display twisted rod morphology and hierarchical *** the evaporation-induced self-assembly of negatively charged CNC,a broad realm of CNC-based chiroptical materials featuring one-dimensional photonic bandgap and novel chiroptical properties have been developed,which are of scientific and technological *** we presented a brief overview on CNC-based chiroptical materials by evaporation-induced self-assembly,showed energy and chirality transfer in a host-guest environment leading to photonic bandgap modulation of optoelectronic properties,outlined novel chiroptical phenomena and their underlying principles,and demonstrated the application potentials of the CNC-based chiroptical materials.

关键词： cellulose nanocrystals chiroptical materials photonic bandgaps optoelectronics energy and chirality transfer

Corrosion behavior of laser-clad coatings fabricated on Ti6Al4V with different contents of TaC addition

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Rare Metals 2020年第4期39卷 436-447页

作者： Lie-Feng Hu Jun Li Ying-Hao Lv Yang-Feng tao School of Materials Engineering Shanghai University of Engineering ScienceShanghai 201620China

The coatings were produced on Ti6A14V by lasercladding the mixture of Ni-based alloy and different contents of TaC(0 wt%,5 wt%,10 wt%,20 wt%,30 wt%,40 wt%).The microstructure and corrosion behavior of the coatings were investigated in *** coating without TaC is composed of TiNi/Ti2Ni(matrix)and TiC/TiB/TiB2(reinforcement).Moreover,TaC is precipitated again and TiC/TiB/TiB2 solid solutions containing Ta are formed in the *** potential of the coatings(-0.639,-0.636,-0.547,-0.534,-0.471 and-0.348 V)increases,and passive current density(1×10-5.4,1×10-5.6,1×10-6.4,1×10-6.8,1×10-6.7 and 1×10-6.9 A·cm-2)*** passive films are more difficult to break down(breakdown potential of 0.003,0.080,0.204 and 0.605 V).When the content of TaC exceeds 20 wt%,no breakdown phenomenon is *** passive film on the surface of coating without TaC is mainly composed of TiO2,Al2O3,Cr2O3,CrO3,NiO,Ni2O3 and *** the addition of TaC,Ta2O5 is formed in the passive *** content of Ta2O5 presents an increasing trend with the increase in the content of *** addition of TaC has a positive effect on corrosion resistance of the coatings.

关键词： Laser cladding Coating Microstructural evolution Corrosion resistance

Numerical analysis of heat transfer enhancement on steam condensation in the presence of air outside the tube

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Nuclear Science and Techniques 2022年第8期33卷 55-68页

作者： Wen-tao Li Xian-Ke Meng Hao-Zhi Bian Ming Ding Heilongjiang Provincial Key Laboratory of Nuclear Power System and Equipment Harbin Engineering UniversityHarbin 150001China China Nuclear Engineering Consulting Co. Ltd.Beijing 100073China

In loss-of-coolant accidents,a passive containment heat removal system protects the integrity of the containment by condensing *** a large amount of air exists in the containment,the steam condensation heat transfer can be significantly *** on previous research,traditional methods for enhancing pure steam condensation may not be applicable to steam–air *** the present study,new methods of enhancing condensation heat transfer were adopted and several potentially enhanced heat transfer tubes,including corrugated tubes,spiral fin tubes,and ring fin tubes were ***-CCM+was used to determine the effect of enhanced heat transfer tubes on the steam condensation heat *** to the calculations,the gas pressure ranged from 0.2 to 1.6 MPa,and air mass fraction ranged from 0.1 to *** effective perturbation of the high-concentration air layer was identified as the key factor for enhancing steam–air condensation heat ***,the designed corrugated tube performed well at atmospheric pressure,with a maximum enhancement of 27.4%,and performed poorly at high *** the design of spiral fin tubes,special attention should be paid to the locations that may accumulate high-concentration ***,the ring-fin tubes generally displayed good performance under all conditions of interest,with a maximum enhancement of 24.2%.

关键词： Air–steam condensation Numerical simulation Heat transfer enhancement Fin tube

Research on the big data of traditional taxi and online car-hailing:A systematic review

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Journal of Traffic and Transportation Engineering(English Edition) 2021年第1期8卷 1-34页

作者： tao Lyu Peirong(Slade)Wang Yanan Gao Yuanqing Wang Department of Traffic Engineering College of Transportation EngineeringChang'an UniversityXi'an 710064China Department of Civil Engineering The University of Texas at ArlingtonArlingtonTX 76019USA

The purpose of this paper is to provide a summary of a quick overview of the latest developments and unprecedented opportunities for scholars who want to set foot in the field of traditional taxi and online car-hailing(TTOC).From the perspectives of peoples(e.g.,passenger,driver,and policymaker),vehicle,road,and environment,this paper describes the current research status of TTOC's big data in six hot topics,including the ridership factor,spatio-temporal distribution and travel behavior,cruising strategy and passenger service market partition,route planning,transportation emission and new-energy,and TTOC's data extensional *** topics were included in five mainstreams as follows:(1)abundant studies often focus only on determinant analysis on given transportation(taxi,transit,online car-hailing);the exploration of ridership patterns for a multimodal transportation mode is rare;furthermore,multiple aspects of factors were not considered synchronously in a wide time span;(2)travel behavior research mainly concentrates on the commuting trips and distribution patterns of various travel indices(e.g.,distance,displacement,time);(3)the taxi driver-searching strategy can be divided into autopsychic cruising and system dispatching;(4)the spatio-temporal distribution character of TTOC's fuel consumption(FC)and greenhouse gas(GHG)emissions has become a hotspot recently,and there has been a recommendation for electric taxi(ET)in urban cities to decrease transportation congestion is proposed;and(5)based on TTOC and point of interest(POI)multi-source data,many machine learning algorithms were used to predict travel condition indices,land use,and travel ***,the main bottlenecks and research directions that can be explored in the future are *** hope this result can provide an overview of current fundamental aspects of TTOC's utilization in the urban area.

关键词： Traffic engineering Ridership factor Travel behavior Cruising strategy and route planning Service market partition Transportation emission and new-energy