检索结果-南通市图书馆

Dissolved Organic Matter Features of Three Adjacent Eastern Mediterranean Urbanized Watersheds

Open Journal of Modern Hydrology 2024年第3期14卷 153-173页

作者： Nour Abboud Elias Michel Maatouk Zeinab Matar Veronique Kazpard Research and Analysis Platform for Environmental Sciences (PRASE) Doctoral School of Sciences and Technology (EDST) The Lebanese University Rafic Hariri Campus Hadat Lebanon Laboratory of Georessources Geosciences and Environment (L2GE) Faculty of Sciences The Lebanese University Fanar Lebanon Department of Earth and Life Sciences Faculty of Sciences The Lebanese University Hadat Lebanon

Landscape urbanization broadly affects ecosystems in coastal watersheds, but, until now, the influence of nonpoint source urban inputs on dissolved organic matter (DOM) amount, composition, and source is poorly understood. To understand how DOM composition varied with urbanization, fluorescence excitation-emission matrices (EEMs) were determined for urban and non-urban waters from upstream to downstream sites along three adjacent coastal watersheds that flow into the Mediterranean Sea. Two humic DOM fluorescent components (humic-like and fulvic-like peaks) and two proteinic components (tyrosine-like and tryptophane-like peaks) were identified by EEM fluorescence. The results indicated that urbanization had an important influence on DOM concentration and composition, with urban waters having a high degree of DOM variation due to different land uses surrounding each body of water. Urban waters show a higher DOM fluorescence index (FI), the highest fluorescence intensity of protein-like manifested also by BIX values, and a lower value of the humification index (HIX) than non-urban waters which were dominated by allochthonous inputs. In addition, the EEM was compared in dry and wet season where higher DOM amounts and FI appeared in summer due to autochthonous production coming from algae growth compared to allochthonous input from rainfall dominated in wet season. The concentration of DOC increased from upstream to downstream for the three rivers, especially Beirut River. The increase in DOC values was observed in both dry and wet seasons by 39 and 19 times respectively compared to upstream (0.93 - 0.91 mgC/L).

关键词： Dissolved Organic Matter DOM EEM Fluorescence Spectroscopy Autochthonous/Allochthonous DOM Urbanization Upstream/Downstream Wet/Dry Season

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

Geometrical, microstructural and mechanical characterization of pulse laser welded thin sheet 5052-H32 aluminium alloy for aerospace applications

引用

Transactions of Nonferrous Metals Society of China 2019年第4期29卷 667-679页

作者： T.E.ABIOYE H.ZUHAILAWATI S.AIZAD A.S.ANASYIDA Structural Materials Niche Area School of Materials and Mineral Resources Engineering Engineering CampusUniversiti Sains Malaysia Industrial and production Engineering Department School of Engineering and Engineering TechnologyFederal University of Technology Akure

Pulse laser welding of 0.6 mm-thick AA5052-H32 was performed to determine the optimum set of parameters including laser pulse current,pulse frequency and pulse duration that meets the AWS D17.1 specifications for aerospace *** microstructure and mechanical properties of the weldments were also *** between the parameters and weld bead geometry were *** quality weld joints without solidification crack that met AWS D17.1 requirements were obtained at(I)high pulse energy(25 J)and high average peak power(4.2 kW)and(II)low pulse energy(17.6 J)and low average peak power(2.8 kW).The weld joint formed at lower heat energy input exhibited finer dendritic grain *** vapourisation and hard phase compound(Al0.5Fe3Si0.5)formation decreased in the weld joint formed at lower heat energy ***,the tensile strength of the weldment formed at lower heat energy input(168 MPa)is by a factor of 1.15 higher but showed^29%decrease in hardness(111 HV0.1)at the joint when being compared with the weldment formed at higher heat energy *** parameters selection is critical to obtaining 0.6 mm-thick AA5052-H32 pulse laser weld joints that meet AWS D17.1 requirements for aircraft structures.

关键词： pulse laser welding aluminium alloy thin sheet microstructure mechanical properties solidification cracking intermetallic compound

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

Bone-targeting engineered small extracellular vesicles carrying anti-miR-6359-CGGGAGC prevent valproic acid-induced bone loss

引用

Signal Transduction and Targeted Therapy 2024年第2期9卷 751-765页

作者： Xudong Xie Peng Cheng Liangcong Hu Wu Zhou Detai Zhang Samuel Knoedler Guodong Liu Yuan Xiong Hang Xue Yiqiang Hu Barbara Kern Doha Obed Adriana CPanayi Lang Chen Chenchen Yan Ze Lin Guandong Dai Bobin Mi Yingze Zhang Guohui Liu Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration Wuhan 430022China Department of Clinical Laboratory Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022P.R.China Division of Plastic Surgery Brigham and Women’s HospitalHarvard Medical SchoolBostonMA 02152USA Department of Plastic Surgery and Hand Surgery Klinikum Rechts der IsarTechnical University of MunichMunichGermany Medical Center of Trauma and War Injuries Daping HospitalArmy Medical UniversityChonqing 400042China Department of Plastic Surgery Campus CharitéMitte|Campus Virchow-KlinikumCharité-Universitätsmedizin Berlincorporate member of Freie Universität BerlinHumboldt-Universität zu Berlin and Berlin Institute of HealthBerlinGermany Berlin Institute of Health Charité-Universitätsmedizin BerlinBerlinGermany Department of Plastic AestheticHand and Reconstructive SurgeryHannover Medical SchoolHannoverGermany Department of Hand Plastic and Reconstructive SurgeryMicrosurgeryBurn CenterBG Trauma Center LudwigshafenUniversity of HeidelbergLudwig-Guttmann-Strasse 1367071 Ludwigshafen/RhineGermany Pingshan District People’s Hospital of Shenzhen Pingshan General Hospital of Southern Medical UniversityShenzhenGuangdong 518118China Department of Orthopaedic Surgery The Third Hospital of Hebei Medical UniversityNO.139 Ziqiang RoadShijiazhuang 050051China

The clinical role and underlying mechanisms of valproic acid(VPA)on bone homeostasis remain ***,we confirmed that VPA treatment was associated with decreased bone mass and bone mineral density(BMD)in both patients and *** effect was attributed to VPA-induced elevation in osteoclast formation and *** RNA-sequencing,we observed a significant rise in precursor miR-6359 expression in VPA-treated osteoclast precursors in vitro,and further,a marked upregulation of mature miR-6359(miR-6359)in vivo was demonstrated using quantitative real-time PCR(qRT-PCR)and miR-6359 fluorescent in situ hybridization(miR-6359-FISH).Specifically,the miR-6359 was predominantly increased in osteoclast precursors and macrophages but not in neutrophils,T lymphocytes,monocytes and bone marrow-derived mesenchymal stem cells(BMSCs)following VPA stimulation,which influenced osteoclast differentiation and bone-resorptive ***,VPA-induced miR-6359 enrichment in osteoclast precursors enhanced reactive oxygen species(ROS)production by silencing the SIRT3 protein expression,followed by activation of the MAPK signaling pathway,which enhanced osteoclast formation and activity,thereby accelerating bone ***,there are no medications that can effectively treat VPA-induced bone ***,we constructed engineered small extracellular vesicles(E-sEVs)targeting osteoclast precursors in bone and naturally carrying anti-miR-6359 by introducing of EXOmotif(CGGGAGC)in the 3’-end of the anti-miR-6359 *** confirmed that the E-sEVs exhibited decent bone/osteoclast precursor targeting and exerted protective therapeutic effects on VPA-induced bone loss,but not on ovariectomy(OVX)and glucocorticoid-induced osteoporotic models,deepening our understanding of the underlying mechanism and treatment strategies for VPA-induced bone loss.

关键词： miR protective stimulation

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

CORRELATION OF PRODUCT ION PROFILES WITH MOLECULAR STRUCTURES OF ANABOLIC STEROIDS IN LC-MS

CORRELATION OF PRODUCT ION PROFILES WITH MOLECULAR STRUCTURE...

引用

第十三届北京分析测试学术报告会暨展览会(BCEIA 2009)

作者： Fuyu GUAN Youwen YOU Cornelius E.UBOH Lawrence R.SOMA University of Pennsylvania School of Veterinary MedicineNew Bolton Center Campus Pennsylvania equine Toxicology & Research Center West Chester University

Anabolic and androgenic steroids are compounds related to testosterone in chemical structure,and able to promote conversion of fat to muscle in the body and thus,enhance athletic performance in *** are banned from use...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A Novel Photoproduct of Uracil in Phosphate-Buffered Saline

引用

Chinese Chemical Letters 2000年第8期11卷 679-680页

作者： Feng LIN (Department of Chemistry, Xi-xi campus, Zhejiang University, Hangzhou 310028) Department of Chemistry Xi-xi Campus Zhejiang University

The photolysis of uracil in phosphate-buffered saline (PBS, pH 8.0) under the irradiation pf medium pressure mercury lamp (MPML) leads to the production of a novel compound C4H5N2O6P. The composition and structure of ... 详细信息

关键词： UV photolysis uracil phosphate-buffered saline (PBS)

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

Exploring Pedagogical Ideologies and Strategies for College English Writing Instruction from a Generative Artificial Intelligence Perspective

引用

Journal of Contemporary Educational Research 2024年第1期8卷 173-178页

作者： Boya Zhang Chang’an campus of Xi’an International Studies University Chang’an 710100Shaanxi ProvinceChina

This study,drawing on the commonalities between generative artificial intelligence and foreign language writing instruction,outlines the core ideology of digital humanities-based college English writing instruction,including auxiliary use of generative artificial intelligence tools,primary focus on humanistic education,and the re-production of knowledge,aiming to foster students’critical thinking,collaborative skills,and *** on this foundation,the study delves into generative artificial intelligence tools applicable to different stages of process-genre writing and their strategic *** use of generative artificial intelligence tools is beneficial for students to present,discuss,and share writing content,encouraging them to enhance their writing,collaboration,critical thinking,and creative abilities through deep interaction with model essays and creative discourses.

关键词： Generative artificial intelligence College English writing instruction Process-genre approach Ideologies and strategies

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

Experimental Study of Stable Surfaces for Anti-Slug Control in Multi-phase Flow

引用

International Journal of Automation and computing 2016年第1期13卷 81-88页

作者： Simon Pedersen Petar Durdevic Kasper Stampe Sandra Lindberg Pedersen Zhenyu Yang Department of Energy Technology Aalborg University Esb jerg Campus

Severe slugging flow is always challenging in oil ＆ gas production, especially for the current offshore based production. The slugging flow can cause a lot of problems, such as those relevant to production safety~ fatigue as well as capability. As one typical phenomenon in multi-phase flow dynamics, the slug can be avoided or eliminated by proper facility d^sign or control of operational conditions. Based on a testing facility which can emulate a pipeline-riser or a gas-lifted production well in a scaled-down manner, this paper experimentally studies the correlations of key operational parameters with severe Slugging flows. These correlations are reflected through an obtained stable surface in the parameter space, which is a natural extension of the bifurcation plot. The maximal production opportunity without compromising the stability is also studied. Relevant studies have already showed that the capability, performance and efficiency of anti-slug control can be dramatically improved if these stable surfaces can be experimentally determined beforehand. The paper concludes that obtaining the stable surface on the new developed map can significantly improve the production rate in a control scheme. Even though the production rate can be further improved by moving the stable surface using advanced control strategies, the constant inputs can in some cases be preferable due to the easier implementation.

关键词： Offshore oil and gas anti-slug flow control production-rate optimization stabilization bifurcation.

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

Modulation of microglial functions by methyl jasmonate

引用

Neural Regeneration Research 2018年第7期13卷 1290-1293页

作者： Jordan A.McKenzie Andis Klegeris Biology Department University of British Columbia Okanagan Campus

Neuroinflammation contributes to the neurodegenerative processes in Alzheimer＇s disease（AD）;therefore,characterization of novel drug candidates aimed at combatting inflammation in the central nervous system is one of the potential avenues for the development of effective AD treatment and prevention ***-neuronal microglial cells orchestrate neuroinflammatory reactions,and their adverse activation has been linked to AD *** jasmonate（MJ） has anti-cancer properties and has also been shown to reduce peripheral inflammation in pre-clinical ***,anti-neuroinflammatory activity of MJ was demonstrated in mice,but the exact cellular and molecular mechanisms responsible for this beneficial effect are *** hypothesized that MJ can regulate select microglial functions,and used two different in vitro models of microglia to test this *** inhibited the production of damaging reactive oxygen species by differentiated human HL-60 promyelocytic leukemia cells without reducing their *** also selectively upregulated phagocytic activity of murine BV-2 microglia,but had no effect on nitric oxide secretion by these *** microglial phagocytosis can be beneficial for clearance of amyloid β aggregates in AD,the observed upregulation of phagocytic activity by MJ,combined with its inhibitory effect on reactive oxygen species production,supports continued studies of MJ as a candidate drug for managing adverse neuroinflammation in AD.

关键词： Alzheimer's disease anti-inflammatory glia neuroinflammation neurodegeneration neuroprotection nitric oxide phagocytosis reactive nitrogen species reactive oxygen species

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

Current perspectives on dengue episode in Malaysia

引用

Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 386-392页

作者： Ee Leen Pang Hwei-San Loh School of Biosciences.Faculty of Science.The University of Nottingham Malaysia campus Biotechnology Research Centre The University of Nottingham Malaysia Campus

To Prevalence of dengue transmission has been alarmed by an estimate of 390 million infections per *** encroachment,ecological disruption and poor sanitation are all contributory factors of increased *** however arises from the fact that dengue virus inherently exists as four different *** infection is often manifested in the more severe form,such that antibody-dependent enhancement(ADE) could aggravate ailment by allowing pre-existing antibodies to form complexes with infecting viruses as means of ***,increased viraemic litter and suppression of antiviral response are *** concerns are thus expressed in regards to escalating trend of hospitalisation and mortality *** Malaysia,situation is exacerbated by improper clinical management and pending vector control *** a preparedness strategy against the potential deadly dengue pandemic,the call for development of a durable and costeffective dengue vaccine against all infecting serotypes is *** though several vaccine candidates are currently being evaluated in clinical trials,uncertainties in regards to serotypes interference,incomplete protection and dose adequacy have been *** of sole reliance on outsourcing,production of local vaccine should be considered in coherent to government's efforts to combat against dengue.

关键词： Dengue Antibody-dependent enhancement Pandemic Vaccine Malaysia

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

Performance of a water hyacinth(Eichhornia crassipes)system in the treatment of wastewater from a duck farm and the effects of using water hyacinth as duck feed

引用

Journal of Environmental Sciences 2008年第5期20卷 513-519页

作者： LU Jianbo FU Zhihui YIN Zhaozheng Institute of Agro-Ecology and Ecological Engineering College of Life Sciences Zijingang Campus Zhejiang University Hangzhou 310058 China College of Animal Sciences Huajiachi Campus Zhejiang University Hangzhou 310029 China

Nowadays, intensive breeding of poultry and livestock of large scale has made the treatment of its waste and wastewater an urgent environmental issue, which motivated this study. A wetland of 688 mz was constructed on an egg duck farm, and water hyacinth （Eichhornia crassipes） was chosen as an aquatic plant for the wetland and used as food for duck production. The objectives of this study were to test the role of water hyacinth in purifying nutrient-rich wastewater and its effects on the ducks＇ feed intake, egg laying performance and egg quality. This paper shows that the constructed wetland removed as much as 64.44% of chemical oxygen demand （COD）, 21.78% of total nitrogen （TN） and 23.02% of total phosphorus （TP）. Both dissolved oxygen （DO） and the transparency of the wastewater were remarkably improved, with its transparency 2.5 times higher than that of the untreated wastewater. After the ducks were fed with water hyacinth, the average daily feed intake and the egg-laying ratio in the test group were 5.86% and 9.79% higher, respectively, than in the control group; the differences were both significant at the 0.01 probability level. The egg weight in the test group was 2.36% higher than in the control group （P 〈 0.05）, but the feed conversion ratios were almost the same. The eggshell thickness and strength were among the egg qualities significantly increased in ducks fed with water hyacinth. We concluded that a water hyacinth system was effective for purifying wastewater from an intensive duck farm during the water hyacinth growing season, as harvested water hyacinth had an excellent performance as duck feed. We also discussed the limitations of the experiment.

关键词： water hyacinth (Eichhornia crassipes) duck farm constructed wetland chemical oxygen demand (COD) treatment effect egg-laying ratio egg quality

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

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：