检索结果-南通市图书馆

Emission characteristics of biogenic volatile organic compounds in a subtropical pristine forest of southern China

Journal of Environmental Sciences 2025年第2期148卷 665-682页

作者： Xi Chen Daocheng Gong Youjing lin qiao Xu Yujin Wang Shiwei liu Qinqin li Fangyuan Ma Jiangyong li Shuo Deng Hao Wang Boguang Wang Institute for Environmental and Climate Research Jinan UniversityGuangzhou 511443China Guangdong Provincial Observation and Research Station for Atmospheric Environment and Carbon Neutrality in Nanling Forests China Australia-China Centre for Air Quality Science and Management(Guangdong) Guangzhou 511443China Hainan Provincial Ecological and Environmental Monitoring Center Haikou 571126China

Emission characteristics of biogenic volatile organic compounds(BVOCs)from dominant tree species in the subtropical pristine forests of China are extremely *** we conducted in situ field measurements of BVOCs emissions from representative mature evergreen trees by using dynamic branch enclosures at four altitude gradients(600-1690ma.s.l.)in the Nanling Mountains of southern *** characteristics as well as seasonal and altitudinal variations were *** emission rates and canopyscale emission factors were then *** showed that BVOCs emission intensities in the wet season were generally higher than those in the dry *** were the dominant BVOCs emitted from most broad-leaved trees,accounting for over 70%of the *** superba,Yushania basihirsuta and Altingia chinensis had relatively high emission intensities and secondary pollutant formation *** localized emission factors of isoprene were comparable to the defaults in the Model of Emissions of Gases and Aerosols fromNature(MEGAN),while emission factors of monoterpenes and sesquiterpenes were 2 to 58 times of those in the *** results can be used to update the current BVOCs emission inventory in MEGAN,thereby reducing the uncertainties of BVOCs emission estimations in forested regions of southern China.

关键词： Biogenic volatile organic compounds(BVOCs) Dynamic enclosure system Nanling Mountains Emission factors Emission rates Chemical reactivity

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

Multilevel analysis of the central-peripheral-target organ pathway:contributing to recovery after peripheral nerve injury

引用

Neural Regeneration Research 2025年第10期20卷 2807-2822页

作者： Xizi Song Ruixin li Xiaolei Chu Qi li Ruihua li Qingwen li Kai-Yu Tong Xiaosong Gu Dong ming Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Haihe Laboratory of Brain-Machine Interface and Human-Machine Fusion TianjinChina Department of Rehabilitation Tianjin University Tianjin HospitalTianjinChina Department of Hand Microsurgery Tianjin University Tianjin HospitalTianjinChina School of Exercise and Health Tianjin University of SportTianjinChina Department of Biomedical Engineering the Chinese University of Hong KongHong Kong Special Administrative RegionChina

Peripheral nerve injury is a common neurological condition that often leads to severe functional limitations and *** on the pathogenesis of peripheral nerve injury has focused on pathological changes at individual injury sites,neglecting multilevel pathological analysis of the overall nervous system and target *** has led to restrictions on current therapeutic *** this paper,we first summarize the potential mechanisms of peripheral nerve injury from a holistic perspective,covering the central nervous system,peripheral nervous system,and target *** peripheral nerve injury,the cortical plasticity of the brain is altered due to damage to and regeneration of peripheral nerves;changes such as neuronal apoptosis and axonal demyelination occur in the spinal *** nerve will undergo axonal regeneration,activation of Schwann cells,inflammatory response,and vascular system regeneration at the injury *** damage to target organs can occur,including skeletal muscle atrophy and sensory receptor *** then provide a brief review of the research advances in therapeutic approaches to peripheral nerve *** main current treatments are conducted passively and include physical factor rehabilitation,pharmacological treatments,cell-based therapies,and physical ***,most treatments only partially address the problem and cannot complete the systematic recovery of the entire central nervous system-peripheral nervous system-target organ ***,we should further explore multilevel treatment options that produce effective,long-lasting results,perhaps requiring a combination of passive(traditional)and active(novel)treatment methods to stimulate rehabilitation at the central-peripheral-target organ levels to achieve better functional recovery.

关键词： central nervous system central peripheral target organ multilevel pathological analysis nerve regeneration peripheral nerve injury peripheral nervous system target organs therapeutic approach

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

Electroacupuncture stimulation of auricular concha region improves loss of control over stress induced depression-like behavior by modulating 5-hydroxytryptamine 1A receptor

引用

Journal of Traditional Chinese Medicine 2025年

作者： li Yongfeng CHEN Xinyi REN Wei qiao Haifa Acupuncture and Moxibustion College， Shaanxi University of Traditional Chinese Medicine Faculty of Education， Shaanxi Normal University

OBJECTIVE: To observe whether electroacupuncture stimulation of auricular concha region （EA-ACR） on behavior changes of depression by loss of control over stress model （LOC）， and whether its effect is improved by regulating the expression levels of hydroxytryptamine （serotonin， 5-HT） 1A receptor (5-HT1AR)/hydroxytryptamine （serotonin， 5-HT） 2A receptor (5-HT1AR) in ***: LOC was prepared using a Skinner box， and EA-ACR to observe behavioral changes， and Western Blot was used to detect the changes of 5-HT1AR/5-HT2AR in the hippocampus， and then observe the changes of EA-ACR behavior after microinjection of 5-HT1AR/5-HT2AR antagonist into the hippocampus. RESULTS: EA-ACR improve depressive-like behavior， up-regulated 5-HT1AR expression and down-regulated 5-HT2AR expression in hippocampal brain area. EA-ACR did not improve depression-like behavior after hippocampal microinjection of 5-HT1AR antagonist， while injection of 5-HT2AR antagonists can improve depression-like behaviors. CONCLUSION: EA-ACR can improve depressive-like behaviors. Loss of control over stress leads to up-regulation of 5-HT1AR and down-regulation of 5-HT2AR in the hippocampus， while EA-ACR mainly improves depressive behavior by regulating 5-HT1AR in Hip.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Long-term trends and response of wet ammonia deposition to changes in anthropogenic emissions in the Pearl River delta of China

引用

Journal of Environmental Sciences 2025年第5期151卷 373-386页

作者： mingyue li Lyumeng Ye ming Chang Weihua Chen Shuidi He Buqing Zhong Xuemei Wang Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Institute for Environmental and Climate ResearchJinan UniversityGuangzhou 511443China South China Institute of Environmental Sciences The Ministry of Ecology and Environment of PRCGuangzhou 510530China Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China

The Pearl River Delta(PRD)region has been identified as a significant hotspot of wet ammonium ***,the absence of long-term monitoring data in the area hinders the comprehension of the historical trends and changes in wet NH_(4)^(+)-N deposition in response to emissions,which interferes with the ability to make effective *** study has analyzed the long-term trends of wet NH_(4)^(+)-N deposition flux and has quantified the effect of anthropogenic emissions and meteorological factors at a typical urban site and a typical forest site in the PRD region from 2009 to *** revealed a significant decreasing trend in wet NH_(4)^(+)-N flux in both the typical urban and forest areas of the PRD region,at-6.2%/year(p<0.001)and-3.3%/year(p<0.001),*** emissions are thought to have contributed 47%–57%of the wet NH_(4)^(+)-N deposition trend over the past 12 years compared to meteorological *** conditions dominated the interannual fluctuations in wet NH_(4)^(+)-N deposition with an absolute contribution of 46%–52%,while anthropogenic emissions change alone explained 10%–31%.NH_(3)emissions have the greatest impact on the urban area among anthropogenic emission factors,while SO_(2)emissions have the greatest impact on the forest ***,precipitation was identified as the primary meteorological driver for both *** findings also imply that the benefits of NH_(3)emissions reductions might not immediately emerge due to interference from weather-related factors.

关键词： Long-term trends Inter-annual variation Wet ammonium deposition Anthropogenic emission change Meteorological condition The Pearl River Delta region

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

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

引用

Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing qiao Guo Hui Bojing Sun Dongfang Hou Meidi Wang Xueqian Wu Tao Wu Dong-Sheng li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002HubeiChina Hubei Three Gorges Laboratory Yichang 443007HubeiChina College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan UniversityGuangzhou 510632GuangdongChina

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo_(2)C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS (c-CdS) and hexagonal-CdS (h-CdS) leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo_(2)C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H_(2)production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions Mo_(2)C LSPR Photocatalyst Phase junction Schottkyjunction Photothermal effect

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

Electro-functionalized 2D nitrogen-carbon nanosheets decorated with symbiotic cobalt single-atoms/clusters

引用

Journal of Energy Chemistry 2025年第2期101卷 385-391页

作者： Xinyan Zhou Sifan qiao Zhenzhen Zhao Meiqi liu Kexin Song Fuxi liu Nailin Yue Xiujuan li Meng Zou Wei Zhang Key Laboratory of Automobile Materials MOE and School of Materials Science & Engineering and Electron Microscopy Center and International Center of Future Science and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials Jilin University Key Laboratory of Bionic Engineering Ministry of Education Jilin University

Two-dimensional（2D） materials loaded with single atoms and clusters are being set at the forefront of catalysis due to their distinctive geometric and electronic ***,the usually-complicated synthesis procedures impede in-depth clarification of their catalytic *** this end,herein we developed an efficient one-step dimension-reduction carbonization strategy,with which we successfully architected a highly-efficient catalyst for oxygen reduction reaction（ORR）,featured with symbiotic cobalt single atoms and clusters decorated in two-dimensional（2D） ultra-thin（3.5 nm thickness）nitrogen-carbon *** synergistic effects of the two components afford excellent oxygen reduction activity in alkaline media(E1/2=0.823 V ***) and thereof a high power density(146.61 mW cm-2) in an assembled Zn-air *** revealed by theoretical calculations,the cobalt clusters can regulate electrons surrounding those individual atoms and affect the adsorption of intermediate *** a consequence,the derived active sites of single cobalt atoms lead to a significant improvement of the ORR ***,our work may fuel interests to delicate architectu re of single atoms and clusters coexisting 2D support toward optimal electrocatalytic performance.

关键词： Carbon-Nitrogen Nanosheets Oxygen reduction reaction Single atoms and clusters Two-dimensional

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Subsection cooling system of hot rolling silicon steel and its industrial application

引用

Journal of Iron and Steel Research International 2025年第1期32卷 159-170页

作者： Qiu-na Wang Ji-quan Sun li-po Yang Hai-shen Wang li-jie Dong Jie-ming li Zhen-yang Zhi Yan-wen Bi National Engineering Research Center of Flat Rolling Equipment University of Science and Technology BeijingBeijing100083China Hot Rolling Department of Qian’an Iron and Steel Corporation Shougang Company LimitedTangshan064404HebeiChina National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao066004HebeiChina

An online subsection cooling method for hot rolling silicon steel was designed to achieve local adjustment of transverse roll ***,it was able to meet the requirements of edge drop of the strip by using the features of online thermal ***,after the new subsection spray beam was installed at the exit of mill,the special local cooling rules were analyzed for altering the thermal crown of roll according to rolling process ***,the dynamic impact of subsection cooling on the local thermal crown could just be obtained according to the measured ***,the heat transfer coefficient was determined by different subsection cooling curves under varied rolling ***,the rolling rhythm and variable conditions were important dynamic factors of transient roll temperature in practical rolling ***,real-time calculation and presetting of the thermal crown were carried out to maximize special requirements of load roll gap on local strip *** this new method,the transient temperature and the thermal crown of roll could be quantitatively controlled *** the practical results showed that the predicted temperature was able to match the measured value by more than 95%.Meanwhile,the adjustable range of thermal crown increased by more than 2.5 ***,the qualification rate of strip edge crown has increased from the original 30%to over 70%.

关键词： Subsection cooling Thermal roll crown Multi-parameter coupling Hot rolling Silicon steel

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

Optimizing cooling approach of spiral coil for an electromagnetic steel teeming system of ladle in continuous casting production

引用

Journal of Iron and Steel Research International 2025年第1期32卷 85-94页

作者： ming He Qing-wei Wang li-jia Zhao Wang-zhong Mu Xing-an liu Qiang Wang College of Horticulture Shenyang Agricultural UniversityShenyang110866LiaoningChina Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang110819LiaoningChina Key Laboratory of Protected Horticulture(Ministry of Education) Shenyang Agricultural UniversityShenyang110866LiaoningChina Department of Materials Science and Engineering KTH Royal Institute of TechnologyStockholm10044Sweden

To address the current issues with the conventional slide gate system utilized in the steel teeming process,a unique electromagnetic induction controlled automated steel teeming(EICAST)technology has been *** means of spiral coil in this technology is directly related to its service ***,heat transfer processes of air cooling and spray cooling were compared and ***,the impacts of water temperature,water flow rate and air flow rate were examined in order to maximize the spray cooling *** maintain coil temperature at a low value consistently throughout the entire thermal cycle process of the ladle,a combined cooling mode was finally *** simulation was applied to examine the coil temperature variation with different cooling systems and *** coil operation,spray cooling is said to be more *** controlling the water flow rate and air flow rate,the spray cooling effect is ***,water temperature has little or no impact when using spray *** cooling during the secondary refining process and spray cooling prior to coil operation are combined to further lower coil *** the direction of the spray cooling is from bottom to top,the coil temperature is lowered below 165℃.A practical induction coil cooling plan was provided for the EICAST technology’s production process.

关键词： Electromagnetic induction controlled automated steel teeming technology Spiral coil Spray cooling Heat transfer Continuous casting

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

Mechanism analysis of effect of MgO on reduction swelling behaviour of iron pellets in CO/H_(2)atmosphere based on first-principles calculations

引用

Journal of Iron and Steel Research International 2025年第1期32卷 73-84页

作者： Hong-ming Long Jing-shu An Xing-wang li Ting Wu Sheng-ping He Jie Lei School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resource Comprehensive Utilization(Anhui University of Technology) Ministry of EducationMa’anshan243002AnhuiChina College of Materials Science and Engineering Chongqing UniversityChongqing400044China

To explain the influence mechanism of MgO on the consolidation and reduction characteristics of roasted iron pellets,the properties and structure of pellets were investigated from *** indicated that the MgO addition decreased the reduction swelling index(RSI)and reduction degree of pellets in both CO and H_(2)*** the stepwise reduction process of Fe2O3→Fe3O4→FeO,the reduction behaviour of pellets in CO and H_(2)was similar,while the reduction rate of pellets in H_(2)atmosphere was almost twice as high as that in CO *** the stepwise reduction process of FeO→Fe,the RSI of pellets showed a logarithmic increase in CO atmosphere and a linear decrease in H_(2)*** investigated by first-principles calculations,C and Fe mainly formed chemical bonds,and the CO reduction process released energy,promoting the formation of iron ***,H and Fe produced weak physical adsorption,and the H_(2)reduction process was endothermic,inhibiting the generation of iron *** Mg2+doping in FexO,the nucleation region of iron whiskers expanded in CO reduction process,and the morphology of iron whiskers transformed from“slender”to“stocky,”reducing RSI of the pellets.

关键词： MgO CO atmosphere H_(2)atmosphere Reduction degree Reduction swelling index First-principles calculation

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

Protein@AuNPs Synthesized by Microfluidic Droplet System and Application in Cu(II)and L-Cysteine Sensing

引用

Chemical Research in Chinese Universities 2025年第1期41卷 131-137页

作者： ZHU Xiaotong li Xinyu QI li ZHANG Rongyue li Nan HE Xiaonan qiao Juan College of New Materials and Chemical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617P.R.China Beijing National Laboratory for Molecular Sciences Key Lab of Analytical Chemistry for Living BiosystemsInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China

In this study,Pepsin@AuNPs(Pep@AuNPs)and Trypsin@AuNPs(Try@AuNPs)were synthesized by a microfluidic droplet system using Pepsin and Trypsin as protection reagents and NaOH as reducing *** to the synthesis method in a flask,the AuNPs synthesized by the microfluidic droplet system demonstrated uniform nucleation,superior ultraviolet absorption performance,high stability and short preparation cycles(15 min).The detection range of Cu(II)by Pep@AuNPs was 1.0–100.0µmol/L and the detection limit was 0.3µmol/*** detection range of L-Cysteine by Try@AuNPs was 0.3–250.0 mmol/L and the detection limit was 0.1 mmol/*** universal method provides an effective strategy for the detection of bioactive molecules,such as metal ions and amino acids by AuNPs with protein as a protective agent.

关键词： Microfluidic droplet system AuNPs Trypsin Pepsin

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：