检索结果-南通市图书馆

Microbial Biomass and PLFA Profile Changes in Rhizosphere of Pakchoi(Brassica chinensis L.) as Affected by External Cadmium Loading

引用

Pedosphere 2014年第4期24卷 553-562页

作者： SHENTU Jia-Li HE Zhen-Li ZENG Yan-Yan HE Shan-Ying DU Shao-Ting SHEN Dong-Sheng College of Environmental Science and Engineering Zhejiang Gongshang University Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Zhejiang Gongshang University Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health College of Environmental and Resources ScienceZhejiang University Institute of Food and Agricultural Science Indian River Research and Education CenterUniversity of FloridaFort PierceFL 34945(USA)

The effects of root activity on microbial response to cadmium(Cd) loading in the rhizosphere are not well understood.A pot experiment in greenhouse was conducted to investigate the effects of low Cd loading and root activity on microbial biomass and community structure in the rhizosphere of pakchoi(Brassica chinensis L.) on silty clay loam and silt loamy *** was added into soil as Cd(NO_3)_2 to reach concentrations ranging from 0.00 to 7.00 mg kg^(-1).The microbial biomass carbon(MBC) and community structure were affected by Cd concentration,root activity,and soil *** Cd loading rates(<1.00 mg kg^(-1)) stimulated the growth of pakchoi and microorganisms,but higher Cd concentrations inhibited the growth of *** content of phospholipid fatty acids(PLFAs) was sensitive to increased Cd *** was linearly correlated with the total *** content of general PLFAs in the fungi was positively correlated with the available Cd in the soil,whereas those in the bacteria and actinomycetes were negatively correlated with the available Cd in the *** results indicated that fungi were more resistant to Cd stress than bacteria or actinomycetes,and the latter was the most sensitive to Cd *** biomass was more abundant in the rhizosphere than in the bulk *** activity enhanced the growth of microorganisms and stabilized the microbial community structure in the *** analysis was proven to be sensitive in detecting changes in the soil microbial community in response to Cd stress and root activity.

关键词： acidic soils metal bioavailability microbial community microorganism root activity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Strength prediction model for water-bearing sandstone based on nearinfrared spectroscopy

引用

Journal of Mountain Science 2023年第8期20卷 2388-2404页

作者： ZHANG Xiu-lian ZHANG Fang WANG Ya-zhe TAO Zhi-gang ZHANG Xiao-yun State key laboratory for Geomechanics and Deep Underground Engineering Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and TechnologyBeijing 100083China Collaborative Innovation center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province Shaoxing UniversityShaoxing 312000China Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province Shaoxing UniversityShaoxing 312000China

The strength of water-bearing rock cannot be obtained in real time and by nondestructive experiments,which is an issue at cultural relics protection sites such as grotto *** solve this problem,we conducted a near-infrared spectrum acquisition experiment in the field and laboratory uniaxial compression strength tests on sandstone that had different water saturation *** correlations between the peak height and peak area of the nearinfrared absorption bands of the water-bearing sandstone and uniaxial compressive strength were *** this basis,a strength prediction model for water-bearing sandstone was established using the long short-term memory full convolutional network(LSTM-FCN)***,a field engineering test was carried *** results showed that:(1)The sandstone samples had four distinct characteristic absorption peaks at 1400,1900,2200,and 2325 *** peak height and peak area of the absorption bands near 1400 nm and 1900 nm had a negative correlation with uniaxial compressive *** peak height and peak area of the absorption bands near 2200 nm and 2325 nm had nonlinear positive correlations with uniaxial compressive strength.(2)The LSTM-FCN method was used to establish a strength prediction model for water-bearing sandstone based on near-infrared spectroscopy,and the model achieved an accuracy of up to 97.52%.(3)The prediction model was used to realize non-destructive,quantitative,and real-time determination of uniaxial compressive strength;this represents a new method for the non-destructive testing of grotto rock mass at sites of cultural relics protection.

关键词： Water-bearing sandstone Near-infrared spectroscopy Saturation degree Uniaxial compressive strength Prediction model Dazu Rock Carvings

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development and preclinical evaluation of multifunctional hydrogel for precise thermal protection during thermal ablation

引用

Bioactive Materials 2024年第1期31卷 119-135页

作者： Bowen Zheng Peng Zhang Qijun Lv Tao Wu Yadong Liu Junjie Tang Yanping Ma Lili Cheng Langtao Xu Yizhen Wang Yifan Xue Jie Liu Jie Ren Department of Medical Ultrasonics The Third Affiliated Hospital of Sun Yat-sen UniversityGuangdong Province Key Laboratory of Hepatology ResearchMultiple Disciplinary Team Center of Thyroid DiseasesNo.600Tianhe RoadGuangzhouGuangdong510630PR China School of Biomedical Engineering Shenzhen Campus of Sun Yat-sen UniversityNo.66Gongchang RoadShenzhenGuangdong518107PR China

Image-guided thermal ablation(TA),which is less invasive,has been widely applied for treating various kinds of ***,TA still poses the potential risk of thermal damage to sensitive tissue ***,an adjunctive thermoprotective hydrodissection technique with constant injection of 5%glucose(5%Glu)has currently been adopted for clinical application,but this may be hazardous to *** this study,a multifunctional hyaluronic acid-based hydrogel(HA-Dc)was developed for *** with 5%Glu(the most clinically used solution)and the previously reported F127 hydrogel,the HA-Dc hydrogel was studied in vitro in a porcine liver model and in vivo in a rabbit model and showed good injectability and better tissue retention,stability,and thermoprotective properties throughout the TA ***,in the preclinical evaluation in a Macaca fascicularis(***)model,HA-Dc showed excellent performance in terms of stricter neuroprotection compared with 5%*** addition,the HA-Dc hydrogel with good biocompatibility and controllable degradation behavior in vivo could be a promising platform for thermal protection during clinical TA procedures.

关键词： Thermal ablation Hydrogels protection Neuroprotection Hydrodissection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

L13a-dependent translational control in macrophages imits the pathogenesis of colitis

引用

Cellular & Molecular Immunology 2016年第6期13卷 816-827页

作者： Darshana Poddar Ravinder Kaur William M Baldwin III Barsanjit Mazumder center for Gene Regulation in Health and Disease Department of Biology Geology and Environmental Sciences Cleveland State University Cleveland OH USA Department of Immunology Cleveland Clinic Lemer College of Medicine Cleveland OH USA

Sustained inflammation from infiltrated immune cells plays a pivotal role in the pathogenesis of ulcerative colitis （UC）. Previously, we established the role of ribosomal protein L13a in the regulation of an inflammation-responsive post-transcriptional operon in myeloid cells. However, the role of this protein as a molecular cue to control the severity of colitis is not known. Here, we examined whether L13a-dependent translational control in macrophages could serve as an endogenous defense against colitis. The administration of dextran sodium sulfate induced experimental colitis in myeloid-specific L13a-knockout （KO） and control mice. Pathological scoring and injury to the colon mucosa evaluated the severity of colitis. The steady-state levels of several pro-inflammatory cytokines and chemokines were determined through ELISA and polyribosome profile analysis. Rapid weight loss, severe rectal bleeding, shortening of the colon, and significantly reduced survival rate were observed in the KO mice. Histopathological analysis of the colons of KO mice showed a severe disruption of epithelial crypts with immune cell infiltrates. Elevated levels of several inflammatory cytokines and chemokines and abrogation of their naturally imposed translational silencing were observed in the colons of the KO mice. Higher serum levels of several pro-inflammatory cytokines and the release of gut bacteria and endotoxins into the blood streams of KO mice were detected, suggesting the amplification of the inflammatory response to septicemia. Taken together, these results reveal an essential role for L13a in the endogenous protection against UC and demonstrate the potential for new therapeutic opportunities through the deliberate promotion of this mechanism.

关键词： inflammation L13a, macrophages, translational control ulcerative colitis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nonlinear terahertz devices utilizing semiconducting plasmonic metamaterials

引用

Light(Science & Applications) 2016年第1期5卷 760-766页

作者： Huseyin R Seren Jingdi Zhang George R Keiser Scott J Maddox Xiaoguang Zhao Kebin Fan Seth R Bank Xin Zhang Richard D Averitt Laboratory for Microsystems Technology Department of Mechanical EngineeringBoston UniversityBostonMA 02215USA Department of Physics Boston UniversityBostonMA 02215USA Department of Physics UC San DiegoLa JollaCA 92093USA School of Engineering Brown UniversityProvidenceRI 02912USA Microelectronics Research center The University of Texas at AustinAustinTX 78758USA

The development of responsive metamaterials has enabled the realization of compact tunable photonic devices capable of manipulating the amplitude,polarization,wave vector and frequency of *** of semiconductors into the active regions of metallic resonators is a proven approach for creating nonlinear metamaterials through optoelectronic control of the semiconductor carrier ***-free subwavelength resonant semiconductor structures offer an alternative approach to create dynamic *** present InAs plasmonic disk arrays as a viable resonant metamaterial at terahertz ***,InAs plasmonic disks exhibit a strong nonlinear response arising from electric field-induced intervalley scattering,resulting in a reduced carrier mobility thereby damping the plasmonic *** demonstrate nonlinear perfect absorbers configured as either optical limiters or saturable absorbers,including flexible nonlinear absorbers achieved by transferring the disks to polyimide *** plasmonic metamaterials show potential for use in ultrafast terahertz(THz)optics and for passive protection of sensitive electromagnetic devices.

关键词： nonlinear absorbers nonlinear metamaterials plasmonic semiconductor metamaterials terahertz metamaterials transfer printing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Further investigation on the fusion of ^(6)Li with ^(209)Bi target at near-barrier energies

引用

Chinese Physics C 2024年第7期48卷 106-117页

作者：张高龙焦振威张广鑫 M.R.Cortes 胡世鹏钱建强 D.Mengoni 屈卫卫李聪博郑云张焕乔孙慧斌王楠张春雷 J.J.Valiente-Dobón D.Testov M.Mazzocco A.Gozzelino C.Parascandolo D.Pierroutsakou M.La Commara A.Goasduff D.Bazzacco D.R.Napoli F.Galtarossa F.Recchia A.Illana S.Bakes I.Zanon S.Aydin G.de Angelis M.Siciliano R.Menegazzo S.M.Lenzi J.L.Ferreira J.Rangel Serkan Akkoyun L.F.Canto J.Lubian School of Physics Beihang UniversityBeijing 100191China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de Física Universidade Federal Fluminense24210-340NiteróiRio de JaneiroBrazil Institute for Advanced Study in Nuclear Energy&Safety Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Research and Manufacture of High Purity Germanium Materials and Fetectors Shenzhen UniversityShenzhen 518060China INFN Sezione di PadovaPadovaItaly Dipartimento di fisica Astronomia dell'Universita di padova PadovaItaly State Key Laboratory of Radiation Medicine and protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China China Institute of Atomic Energy Beijing 102413China The Key Laboratory of Beam Technology and Material Modification of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China INFN Laboratori Nazionali di LegnaroI-35020 LegnaroItaly INFN Sezione di NapoliI-80126 NapoliItaly Dipartimento di Farmacia Universitàdi Napoli"Federico II"I-80131 NapoliItaly Department of Natural and Mathematical Sciences Faculty of EngineeringTarsus University33480 MersinTurkiye Physics Division Argonne National LaboratoryLemont-ILUSA Departamento de Matemaética Física e Computaç˜ao Universidade do Estado do Rio de JaneiroFaculdade de Tecnologia27537-000ResendeRio de JaneiroBrazil Department of Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de Física Universidade Federal do Rio de JaneiroCP 6852821941-972Rio de JaneiroBrazil

The complete and incomplete fusion cross sections for ^(6)Li+^(209)Bi were measured using the in-beamγ-ray method around the Coulomb *** cross sections of(deuteron captured)incomplete fusion(ICF)products were re-quantified experimentally for this reaction *** results reveal that the ICF cross section is equivalent to that of complete fusion(CF)above the Coulomb barrier and dominant near or below the Coulomb barrier.A theoretical calculation based on the continuum discretized coupled channel(CDCC)method was performed for the aforementioned CF and ICF cross sections;the result is consistent with the *** universal fusion function(UFF)was also compared with the measured CF cross section for different barrier parameters,demonstrating that the CF suppression factor is significantly influenced by the choice of potential,which can reflect both dynamic and static effects of breakup on the fusion process.

关键词： cross section incomplete fusion suppression factor weakly bound nuclei

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hypoxic preconditioning：effect,mechanism and clinical implication(Part 1)

引用

中国应用生理学杂志 2014年第6期30卷 489-501页

作者： Guo-wei LU Institute for Hypoxia Medicine Basic Medical College Capital Medical University Beijing 100069 Biomedicine Research center Baotou Medical College Baotou 014060 China

Hypoxic preconditioning(HPC) refers to exposure of organisms,systems,organs,tissues or cells to moderate hypoxia/ischemia that is able to result in a resistance to subsequent severe hypoxia/ischemia in tissues and *** effects exerted by HPC are well *** original local in situ(LiHPC) is now broadened to remote ectopic organs-tissues(ReHPC) and extended crossly to cross pluripotential HPC(CpHPC) induced by a variety of stresses other than hypoxia/ischemia,including cancer,for *** developed a unique animal model of repetitive autohypoxia in adult mice,and studied systematically on the effects and mechanisms of HPC on the model in our laboratory since the early 1960 *** tolerances to hypoxia and protection from injury increased significantly in this *** adult mice behave like hypoxia-intolerant mammalian newborns and hypoxia-tolerant adult animals during their exposure to repetitive *** overall energy supply and demand decreased,the microorganization of the brain maintained and the spacial learning and memory ability improved but not impaired,the detrimental neurochemicals such as free radicals down-regulated and the beneficial neurochemicals such as adenosine(ADO) and antihypoxic gene(s)/factor(s)(AHGs/AHFs) ***,we hypothesize that mechanisms for the tolerance / protective effects of HPC are fundamentally depending on energy saving and brain plasticity in *** is thought that these two major mechanisms are triggered by exposure to hypoxia/ischemia via oxygen sensing-transduction pathways and HIF-1 initiation *** suggest that HPC is an intrinsic mechanism developed in biological evolution and is a novel potential strategy for fighting against hypoxia-ischemia and other *** of endogenous antihypoxic potential,activation of oxygen sensing- signal transduction systems and supplement of exogenous antihypoxic substances as well as development of HPC appliances and HPC medicines

关键词：低氧预处理抗缺氧临床意义神经化学物质信号转导系统缺氧缺血动物模型机理

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Overall results and prospects of the cancer risk assessment in the Urals population affected by chronic low dose-rate exposure

引用

Radiation Medicine and protection 2022年第4期3卷 159-166页

作者： Alexander Vasilyevich Akleyev Marina Olegovna Degteva Ludmila Yurievna Krestinina Urals Research center for Radiation Medicine Federal Medical-Biological Agency of RussiaChelyabinskRussia Chelyabinsk State University ChelyabinskRussia

The paper presents the key milestones and outcomes of 65-year studies of the carcinogenic consequences of accidental radiation exposure of the population of the Ural *** radioactive contamination of the Techa River and the 1957 accident at the Mayak Production Association were the reasons of the long-term population exposure at a wide *** most important tasks of the study were the reconstruction of individual doses,follow-up of the solid cancer and leukemia incidence and mortality among cohort *** research results have shown that chronic human exposure,in comparison to acute exposure,does not reduce the risk of developing malignant tumors and *** value of the dose-rate factor does not exceed"one".Thus,according to our data,the Publication 103 of the International Commission on Radiological protection seemed to underestimate the radiation risk of malignant tumors and leukemias in case of low dose-rate exposure of the population by a factor of *** for further radio-epidemiological studies in the Urals are associated with the analysis of the cohort of Southern Urals Populations Exposed to Radiation,which includes about 63 thousand exposed people and makes it possible to assess the radiation risk of solid cancers of certain localizations,certain types of leukemia,and non-cancer effects.

关键词： Radio-epidemiological studies Techa river East Urals radioactive trace Malignant tumors Leukemias Dose-rate factor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synthesis and evaluation of an oil-soluble viscosity reducer for heavy oil

引用

Petroleum Science 2010年第4期7卷 536-540页

作者： Guo Jixiang Wang Heyi Chen Chaogang Chen Yun Xie Xiaohai Enhanced Oil Recovery Research center China University of Petroleum Beijing 102249 China Research Institute of Shaanxi Yanchang Petroleum（group） Co. Ltd Shaanxi 710075 China Northwest Oilfield Branch Engineering and Technology Institute of Sinopec Urumchi 830011 China Tuha Oilfield Hami Xinjiang 839009 China Yumen Oilfield Yaerxia Operation Area Gansu 735019 China

To reduce the viscosity of highly-viscous oil of the Tahe oilfield （Xinjiang,China）,an oilsoluble polybasic copolymer viscosity reducer for heavy oil was synthesized using the orthogonal *** optimum reaction conditions are obtained as follows：under the protection of nitrogen,a reaction time of 9 h,monomer mole ratio of reaction materials of 3：2：2 （The monomers are 2-propenoic acid,docosyl ester,maleic anhydride and styrene,respectively）,initiator amount of 0.8% （mass percent of the sum of all the monomers） and reaction temperature of 80 *** synthesized viscosity reducer is more effective than commercial viscosity *** rate of viscosity reduction reached 95.5% at 50 *** spectra （IR） and interfacial tensions of heavy oil with and without viscosity reducer were investigated to understand the viscosity reduction *** viscosity reducer is added,the molecules of the viscosity reducer are inserted amongst the molecules of crude oil,altering the original intermolecular structure of crude oil and weakening its ability to form hydrogen bonds with hydroxyl or carboxyl groups,so the viscosity of crude oil is *** tests of the newly developed oil-soluble viscosity reducer was carried out in the Tahe Oilfield,and the results showed that 44.5% less light oil was needed to dilute the heavy oil to achieve the needed viscosity.

关键词： Oil-soluble viscosity reducer heavy oil synthesis evaluation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai

引用

Frontiers in Energy 2019年第1期13卷 120-130页

作者： Lu QU Zhanqing YU Qiang SONG Zhichang YUAN Biao ZHAO Dawei YAO Jianfu CHEN Yao LIU Rong ZENG State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityAdvanced DC Power CenterEnergy Internet InstituteTsinghua UniversityBeijing 100084China Zhuhai Power Supply Bureau Zhuhai 519000China

The DC distribution system is an important development direction of the distribution system,which can improve the reliability and the quality of the power supply,and support the new energy,the energy storage,the electric vehicles,and the flexible access of AC and DC loads to *** realize the demonstration application of the DC distribution technology,China's first demonstration project of the medium voltage DC distribution network will be built in Zhuhai,Guangdong Province to support the construction of the city energy ***,this paper analyzes the demand of the DC distribution network project,and puts forward the construction content and construction ***,it designs and analyzes the electrical connection mode,system operation mode,and startup and shutdown mode of the DC distribution network,and proposes the overall project construction ***,it conducts the specific project design and analysis,which mainly in elude the selection of equipment such as inverters,DC transformers and DC circuit breakers,the design and analysis of the DC control and protection system,the design and analysis of the overvoltage protection and the configuration scheme of the lightning arrester,and analysis of the system transient *** design and analysis of the engineering program is a combination of China's distribution network engineering practice and technical characteristics,which lays a solid foundation for the advancement of the DC power distribution technology in China,and has reference value and demonstration effect for the design and construction of other projects.

关键词： MVDC distribution network DC solid state transformer DC circuit breaker modular multilevel converter

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：