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High-resolution stalagmite δ13C record of soil processes from southwestern China during the early MIS 3

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Chinese Science Bulletin 2013年第7期58卷 796-802页

作者： LIU DianBing WANG YongJin CHENG Hai edwards R L College of Geography Science Nanjing Normal University Institute of Global Environmental Change Xi'an Jiaotong University Department of Geology and Geophysics University of MinnesotaMinneapolis

Knowledge of the evolution of pedogenic processes in the carbonate area is important to understand the dynamics of rock desertification.A precisely-dated stalagmite δ13C record between 61.3 and 50.5 ka BP from southwestern China,potentially related to soil biogenic CO2 production,shifts within a narrow range between -9‰ and -7‰,and exhibits a prominent cycle of 350-470 a,independent of the Asian monsoon *** indicates that a threshold effect might control the amplitude of calcite δ13C variability,likely associated with the vertical soil loss in the carbonate *** periodic δ13C changes reflect that the loss/recovery of soil cover can operate on centennial ***,the rock desertification in southwestern China might at least initiate 60 ka ago and should be of natural origin.

关键词： Wulu 洞石笋稳定的碳同位素一百年的变化玷污过程

Trace element geochemistry and stable isotopic(δ^(13)C andδ^(15)N)records of the Paleocene coals,Salt Range,Punjab,Pakistan

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International Journal of Mining Science and Technology 2022年第3期32卷 551-561页

作者： Noshin Masood Tehseen Zafar Karen A.Hudson-edwards Hafiz U.Rehman Abida Farooqi Environmental Geochemistry Laboratory Department of Environmental SciencesFaculty of Biological SciencesQuaid-i-Azam UniversityPO 45320Pakistan Institute of Geochemistry Chinese Academy of SciencesGuiyang 550081China Institute of Geology University of the PunjabLahore 54590Pakistan Environment&Sustainability Institute and Camborne School of Mines University of ExeterTR109EZUK Graduate School of Sciences and Engineering Kagoshima UniversityKagoshima 890-0065Japan

The Paleocene coals of the Salt Range in the Punjab Province of Pakistan have great economic potential;however,their trace element and stable isotopic characteristics have not been studied in detail except for a few sporadic *** this study,a total of 59 coal samples of which 14 are obtained from open cast mines have been investigated for elemental composition andδ^(13)C-δ^(15)N isotopic *** contents of trace elements such as Co,Cr,Cu,Pb,Sr,Th,U,V,and Zn are 7.4,41.7,11.2,12.5,90.2,4.0,1.9,128,and 31.1 mg/kg,*** values,when compared with the World Coal Clarke values,were relatively higher in low-rank coals in comparison with Clarke values for brown ***,As(20.4 mg/kg),Co(6.6 mg/kg),Cr(22.4 mg/kg),Cu(^(13).3 mg/kg),Pb(19.2 mg/kg),Sr(^(15)4.7 mg/kg),Th(2.5 mg/kg),V(47.8 mg/kg),and Zn(75.1 mg/kg)were significantly higher in the sub-bituminous to bituminous coals of the Salt *** analysis,based on X-ray diffraction and energy dispersive X-ray spectroscopy,revealed that the studied samples contain illite,kaolinite calcite,gypsum,pyrite,and *** affinity with organic and inorganic phases of coals calculated by an indirect statistical approach indicated a positive association of ash content with Ag,Al,Co,Cr,Cs,Cu,Mn,P,Rb,Pb,Th,U,and V,suggesting the presence of inorganic components in studied ***,As,Fe,Sr,and Zn exhibit negative correlations that imply their association with the organic ***δ^(13)C andδ^(15)N isotopic range and average−24.94‰to−25.86‰(−25.41‰)and−2.77‰to 3.22‰(0.96‰),respectively,reflecting 3C type modern terrestrial vegetation were common in the palaeomires of studied coal *** addition,the trivial variations of 0.92‰and 0.45‰among^(13)C and^(15)N values can be attributed to water level fluctuations and plant assemblies.

关键词： Coal Salt Range Pakistan Geochemistry Trace elements δ^(13)C andδ^(15)N isotopes

Decarbonising energy: The developing international activity in hydrogen technologies and fuel cells

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Journal of Energy Chemistry 2020年第12期29卷 405-415页

作者： John Meurig Thomas Peter P.edwards Peter J.Dobson Gari P.Owend Department of Materials Science&Metallurgy University of CambridgeCambridge CB30FSUK King Abdulaziz City for Science and Technology(KACST)-Oxford Centre of Excellence in Petrochemicals and Inorganic Chemistry Laboratory University of OxfordOxford OX13QRUK The Queen’s College University of OxfordOxford OX14AWUK Annwvyn Solutions(Independent Consultant) BromleyKent BR13DWUK

Hydrogen technologies and fuel cells offer an alternative and improved solution for a decarbonised energy *** cells are electrochemical converters;transforming hydrogen (or energy sources containing hydrogen) and oxygen directly into *** hydrogen fuel cell,invented in 1839,permits the generation of electrical energy with high efficiency through a non-combustion,electrochemical process and,importantly,without the emission ofits point of ***,despite numerous efforts to exploit the obvious attractions of hydrogen technologies and hydrogen fuel cells,various challenges have been encountered,some of which are reviewed ***,however,given the exigent need to urgently seek low-carbon paths for humankind’s energy future,numerous countries are advancing the deployment of hydrogen technologies and hydrogen fuel cells not only for transport,but also as a means of the storage of excess renewable energy from,for example,wind and solar ***,hydrogen is also being blended into the natural gas supplies used in domestic heating and targeted in the decarbonisation of critical,large-scale industrial processes such as steel *** briefly review specific examples in countries such as Japan,South Korea and the People’s Republic of China,as well as selected examples from Europe and North America in the utilization of hydrogen technologies and hydrogen fuel cells.

关键词： Decarbonisation Hydrogen Energy Hydrogen Economy Fuel cells Environment Sustainability

Low back pain and golf:A review of biomechanical risk factors

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Sports Medicine and Health Science 2020年第1期2卷 10-18页

作者： Nathan edwards Clark Dickin Henry Wang School of Kinesiology Ball State UniversityMuncieUnited States

Golf is an international sport played by a variety of age groups and fitness levels,and although golf has a low to moderate aerobic intensity level,injuries are common among professional and amateur *** amounts of force experienced during the golf swing can lead to injury when golfers lack appropriate strength or technique with the lower back most commonly *** has indicated that trunk muscle activation,hip strength and mobility,and pelvis and trunk rotation are associated with low back pain(LBP).Based on anecdotal evidence,golf practitioners specifically address issues in weight shift,lumbar positioning,and pelvis sequencing for golfers with *** review aims to elucidate the effects of proper and improper golf swing technique on LBP and to help golf practitioners understand how to approach the alleviation of LBP in their clientele.

关键词： Low back pain Golf Injury Biomechanics Risk factors

A bibliometric review on the implications of renewable offshore marine energy development on marine species

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Aquaculture and Fisheries 2022年第2期7卷 211-222页

作者： Siddharth Suhas Kulkarni David John edwards School of Mechanical Aerospace and Automotive EngineeringCoventry UniversityGulson RoadCoventryCV12JHUK Department of Built Environment Birmingham City UniversityUK Faculty of Engineering and the Built Environment University of JohannesburgSouth Africa

The growing global demand for sustainable and environmentally friendly energy has stimulated the rapid adoption of renewable offshore ***,infrastructure needed for green energy production ironically impacts upon marine species and ***,this positional review paper seeks to comprehensively synthesise the prevailing body of knowledge on the impact of offshore energy development on a broad range of marine *** interpretivist philosophical stance and inductive reasoning was adopted using scientometric analysis to conduct a rich synthesis of extant *** an operational perspective,the Scopus database was utilised to search for key terms on the phenomena under investigation and using the VoS Viewer software for the identification of trends using scientometric *** analysis reveals that research in this area of science has increased significantly over the last decade but private sector involvement is conspicuous by its *** concerns among the research community include the impact of energy development on the abundance of species,pollution and biodiversity behaviour and *** present,researchers have extensively focused on the impact of offshore wind farms on fish and marine ***,the literature reveals no significant long-term impact upon energy development on most marine species albeit,short-term interference has raised concerns(from sound,disruption of navigation and foraging patterns,and damage of habitat).To minimise short term disruption,researchers have recommended the use of acoustic deterrence during construction,enforcement of protected areas and continued research.

关键词： Offshore energy development Wind farms Marine energy Marine species Animals Noise Infrastructure

On the dynamics of a class of perturbed cyclic Lotka-Volterra systems

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International Journal of Biomathematics 2018年第8期11卷 51-70页

作者： Chayu Yang Ashlee edwards Jin Wang Department of Mathematics University of Tennessee at Chattanooga Chattanooga TN 374 03 USA Department of Mathematics Old Dominion University Norfolk VA 23529 USA

We consider a special class of Lotka-Volterra systems where the associated interaction matrix is cyclic, but asymmetric, with a perturbation term on each row. After some discussion of the dynamics under a general setting, we focus our attention on 3D systems for a more detailed study. We derive sufficient conditions for the existence and stability of the nontrivial interior equilibrium. We also show that Hopf bifurcation occurs when the size of the perturbation is large. Such analysis can be similarly extended to higher dimensional systems, and we mention some results in 4D case.

关键词： Lotka Volterra equations interior equilibrium Hopf bifurcation

The Internet for Nurses and Allied Health Professionals 3

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Photosynthesis,Metabolite Composition and Anatomical Structure of Oryza sativa and Two Wild Relatives,*** and ***

丛书名： Health Informatics

2002年

作者： Margaret J. A. edwards

ISBN: (数字)9781461300274

ISBN: (纸本)9780387952369

New and expanded to reflect changes on the Internet, especially the explosive growth of the World Wide Web, this best-selling book is primer to the Internet for those who have little or no computer experience and a time-saving guide to resources for the more experienced surfer. In plain language it describes the Internet, how it works, and how to use various Internet tools. In addition, it provides an extensive listing of health-related Internet resources accompanied by reviews and descriptions - not just URLs - of dozens of health-related topics. From the online "American Journal of Nursing" to the "Virtual Nursing Centre," this third edition contains hundreds of new sites, as well as an expanded section devoted to the use of search engines. The reader will find this directory a treasure trove of information resources available for health care professionals on the Internet. When you need to have up-to-the-minute information at your fingertips, when you need to know about the latest changes in health care reform - that's when you discover the real power of the Internet. It allows you to exchange information with peers around the world instantly, giving you the knowledge edge to keep your nursing or health care practice professional and progressive.

关键词： Nursing Health Informatics

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Rice science 2017年第4期24卷 218-227页

作者： Jwakyung SUNG Suyeon LEE Jong-Wook CHUNG Gerald edwards Hojin RYU Taewan KIM National Institute of Agricultural Science Rural Development Administration(RDA)WanjuJeollabu-do 55365Korea Department of Industrial Plant Science and Technology Chungbuk National UniversityCheongju 28644Korea School of Biological Science Washington State UniversityPullmanWA 99164-4236USA Department of Biology Chungbuk National UniversityCheongju 28644Korea Department of Plant Resources and Science and Institute of Ecological Phytochemistry Hankyung National UniversityAnseong 17579Korea

Photosynthesis, enzyme activities and metabolite pools associated with primary carbon metabolism in leaves were studied in O. grandiglumis and O. alta （wild relatives of rice which produce high biomass） versus O. sativa （a japonica cultivar and a indica-japonica hybrid） to assess their potential for identifying traits which might be utilized to enhance rice productivity. The wild relatives had higher rates of photosynthesis on a fresh weight basis, and higher water use efficiency than the O. sativa lines. There were no striking differences in activities of a number of key enzymes in carbon and nitrogen metabolism between the wild relatives and cultivated rice lines. Along with higher rates of photosynthesis on a fresh weight basis, the leaves of the two wild species had higher nitrate content, higher levels of starch, glucose and fructose, and higher levels of organic acids （malate, succinate and acetate）, compared to the O. sativa lines. The results suggested that O. grandiglumis and O. alta have differences in physiology and primary metabolism which might be exploited to improve growth and productivity of cultivated rice.

关键词： carbohydrate photosynthesis rate nitrogen assimilation metabolite composition leaf rice wild relative

Variation in the plant-mediated methane transport and its importance for methane emission from intact wetland peat mesocosms

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Journal of Plant Ecology 2013年第4期6卷 298-304页

作者： Gurbir S.Bhullar Peter J.edwards Harry Olde Venterink Institute of Integrative Biology ETH ZurichUniversitätstrasse 168092 ZurichSwitzerland

Aims and Methods Vascular plants are known to influence the production,transport and oxidation of methane in wetland soils,but these processes are not well *** plants grown in intact peat cores,we compared the influence upon methane emissions of 20 forb and graminoid species from European *** measured plant-mediated transport of methane(conduit or chimney effect)using a novel agar-sealing technique that prevented methane exchange from the bare soil to the *** Findings the plant-mediated transport(chimney effect)represented between 30%and almost 100%of the total methane flux,with graminoids exhibiting greater internal transport than *** general,plants with less dense root tissues and a relatively larger root volume exhibited a larger chimney *** species(12 out of 20)signif-icantly reduced methane emissions compared to bare soil and only one species,Succisa pratensis,increased *** suggest that characterising vegetation in terms of plant functional traits and plant processes offers an effective method for estimating methane emis-sions from ***,we found no correlation between the magnitude of the chimney effect and the overall influence of different plant species on methane *** introducing a useful tool to study plant-mediated transport,this work suggests that characterising vegetation in terms of functional traits could improve estimates of methane emissions from wetlands,which in turn could help in designing mitigation strategies.

关键词： functional group graminoid forb agar-sealing conduit gas transportreceived