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Use and application of cFc-11,cFc-12,cFc-113 and SF6 as environmental tracers of groundwater residence time:A review

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Geoscience Frontiers 2019年第5期10卷 1643-1652页

作者： L.A. chambers d.c. Gooddy A.M. Binley department of civil and Environmental Engineering University of StrathclydeGlasgowG1 1XJUK Lancaster Environment centre Lancaster UniversityLancasterLA1 4YQUK British Geological Survey Maclean BuildingWallingfordOX10 8BBUK

Groundwater residence time is a fundamental property of groundwater to understand important hydrogeological issues,such as deriving sustainable abstraction volumes,or,the evolution of groundwater *** anthropogenic trace gases chlorofluorocarbons (cFc-11,cFc-12 and.c.c-113) and sulphur hexafluoride (SF6) are ideal in this regard because they have been released globally at known rates and become dissolved in groundwater following Henry’s Law,integrating over large spatial (global) and temporal (d.c.des) *** cFcs and SF6 are able to date groundwater up to w100 years old with the caveat of certain simplifying ***,the inversion of environmental tracer concentrations (cFcs and SF6) to derive groundwater age rests on the accurate determination of groundwater recharge parameters,namely temperature,elevation,salinity and excess air,in addition to resolving the potential for contamination,degradation and unsaturated zone *** review explores the fundamentals of cFc-11,cFc-12,cFc-113 and SF6 as environmental tracers of groundwater age and recommends complementary techniques *** this relatively simple and inexpensive technique has been used to determine initial concentrations at the recharge zone,setting the groundwater dating ‘clock’ to zero,this review then explores the meaning of groundwater ‘age’ in relation to measured environmental tracer *** is shown that the cFcs and SF6 may be applied to a wide-range of hydrogeological problems and suggests that environmental tracers are particularly powerful tools when integrated with numerical flow and transport models.

关键词： Hydrogeology Environmental tracers Groundwater dating

Ultra‑Transparent and Multifunctional IZVO Mesh Electrodes for Next‑Generation Flexible Optoelectronics

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Nano-Micro Letters 2025年第1期17卷 293-309页

作者： Kiran A.Nirmal Tukaram d.dongale Atul c.Khot chenjie Yao Nahyun Kim Tae Geun Kim School of Electrical Engineering Korea UniversityAnam‑ro 145Seongbuk‑guSeoulRepublic of Korea computational Electronics and Nanoscience Research Laboratory School of Nanoscience and BiotechnologyShivaji UniversityKolhapur 416004India

Mechanically durable transparent electrodes are essential for achieving long-term stability in flexible optoelectronic ***,they are crucial for applications in the fields of energy,display,healthcare,and soft *** meshes represent a promising alternative to traditional,brittle,metal oxide cond.c.ors due to their high electrical cond.c.ivity,optical transparency,and enhanced mechanical *** this paper,we present a simple method for fabricating an ultra-transparent cond.c.ing metal oxide mesh electrode using selfcracking-assisted *** this method,we prod.c.d an electrode with ultra-transparency(97.39%),high cond.c.ance(Rs=21.24Ωsq^(−1)),elevated work function(5.16 eV),and good mechanical *** also evaluated the effectiveness of the fabricated electrodes by integrating them into organic photovoltaics,organic light-emitting diodes,and flexible transparent memristor devices for neuromorphic computing,resulting in exceptional device *** addition,the unique porous structure of the vanadium-doped indium zinc oxide mesh electrodes provided excellent flexibility,rendering them a promising option for application in flexible optoelectronics.

关键词： Self-cracking template Vanadium-doped indium zinc oxide mesh Organic solar cells Organic light-emitting diodes Flexible transparent memory

Mineralogy and geochemistry of Nb-,Ta-,Sn-,U-,Th-,and Zr-bearing granitic rocks from Abu Rusheid shear zones,South Eastern desert,Egypt

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chinese Journal Of Geochemistry 2011年第2期30卷 226-247页

作者： Ali M.A. Lentz d.R. Hall d.c. Nuclear Materials Authority P.O.530.El MaadiCairoEgypt department of Geology New Brunswick UniversityUNBCanada Microscopy and Microanalysis Facility New Brunswick UniversityUNBCanada

Granite-hosted,Nb-,Ta-,Sn-,U-,Th-,and Zr(Hf)-bearing mineralization from the Abu Rusheid shear zones occurs about 97 km southwest of the town of Marsa Alam,South Eastern desert,*** SSE-trending brittle-d.c.ile Abu Rusheid shear zones crosscut the peralkalic granitic gneisses and.c.taclastic to mylonitic rocks(mylonite,protomlyonite,and ultramylonite).The northern shear zone varies in width from 1 to 3 m with a strike length of >500 m,and the southern shear zone is 0.5 to 8 m wide and >1 km *** shear zones locally host less altered lamprophyre and locally sheared granitic aplite-pegmatite *** rare-metal minerals,identified from the peralkalic granitic gneisses and.c.taclastic to mylonitic rocks are associated with muscovite,chlorite,quartz,fluorite,pyrite,magnetite,and rare biotite that are restricted to the Abu Rusheid shear zones;these are columbite-tantalite and pyrochlore(***) in the northern shear zone and ferrocolumbite in the southern shear *** occurs as inclusions in the columbite-tantalite minerals.U-and Th-minerals(uraninite,thorite,uranothorite,ishikawaite,and.c.eralite) and Hf-rich zircon ***(?) zircon contains numerous inclusions of rutile,fluorite,U-Th and REE minerals,such as uranothorite,cheralite,monazite,and *** variations in Ta/(Ta+Nb) and Mn/(Mn+Fe) in columbite range from 0.07-0.42 and 0.04-0.33,respectively,and Hf contents in zircon from 1.92-6.46 of the two mineralized shear zones reflect the extreme degree of magmatic *** samples of peralkalic granitic gneisses and.c.taclastic to mylonitic rocks from the southern shear zone have very low TiO2(0.02 wt%-0.04 wt%),Sr [(15-20)×10-6],and Ba [(47-78)×10-6],with high Fe2O3T(0.94 wt%-1.99 wt%),caO(0.14 wt%-1.16 wt%),alkalis(9.2 wt%-10.1 wt%),Rb [(369-805)×10-6],Zr [(1033-2261)×10-6],Nb [(371-913)×10-6],U [(51-108)×10-6],Th [(36-110)×10-6],Ta [(38-108)×10-6],Pb [(39-364)×10-6],Zn [(21-424)×10-6],Y [(8-304)×10-6],Hf

关键词： uranium thorium zircon columbite-tantalite fluorite monazite xenotime age dating granitic gneisses South Eastern desert Egypt

VERIFIcATION ANd.c.MPARISON OF FORMULAS FOR BEd LOAd TRANSPORT

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Journal of Hydrodynamics 2001年第1期13卷 8-11页

作者： Wang, X.K. Li, d.X. Qu, Z.S. Wang, d.c. dep. of Hydraulic Eng. Tsinghua Univ. Beijing 100084 China

Several typical formulas for bed load transport are examined based on field data. It is concluded that the Einstein formula provides good estimates for the bed load transport rate while other ones pred.c. much lower transport rates. The main reason for the under-pred.c.ion is that dp, the effective diameter of particles, is too large as a representative diameter of the bed material for gravel streams with partially movable bed. Performance of these formulas can be significantly improved if d35 is adopted instead of dp.

关键词： Loads (forces) Structural loads

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

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Neural Regeneration Research 2025年第9期20卷 2513-2519页

作者： desmond A.Nunez Ru c.Guo division of Otolaryngology–Head&Neck Surgery Department of SurgeryFaculty of MedicineThe University of British ColumbiaVancouverBCCanada division of Otolaryngology–Head&Neck Surgery Gordon&Leslie Diamond Health Care CentreVancouver General HospitalVancouverBCCanada Faculty of Med.c.ne–The University of British columbia VancouverBCCanada

Hearing loss is the third leading cause of human ***-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health ***-ind.c.d,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing *** etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental *** stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing *** non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic *** hair cell death is a central histopathological finding in sensorineural hearing *** these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing *** EMBASE,Ovid MEdLINE,Web of Science core collection,and *** databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered.c.inical *** red.c.inical trials known to the senior author we re also assessed.A total of 222studies were thus *** excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and.c.inical trials underwent full-text *** resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered.c.inical trial database entries which form the basis of this narrative *** miR-34a and miR-29b levels increase with age in *** miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/P Gc-1α),SIRT

关键词： hearing loss hypoxia microRNAs oxidative stress sensorineural

Multiple sclerosis is at a checkpoint: advancing the program

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Neural Regeneration Research 2025年第3期20卷 811-812页

作者： Brandon c.Smith Jessica L.Williams department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA department of Biological Geologicaland Environmental SciencesCleveland State UniversityClevelandOHUSA

Multiple sclerosis(MS) is a chronic inflammatory and demyelinating disease of the central nervous system(cNS). Patients with MS experience sensory and motor function loss due to myelin and/or axon damage perpetuated b... 详细信息

关键词： Hauser sclerosis damage

Initial and treatment ind.c.d.c.anges to muscle activation patterns in patients with adolescent idiopathic scoliosis compared to the frontal plane spinal config uration as measured with surface electromyography

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颈腰痛杂志 2005年第3期26卷 163-167页

作者： Raymond Wiegand d.c. The Weldon Spring chiropractic clinic Located in St Louis Missouri.

PURPOSE:The purpose of this study is to report paraspinal muscle activity pa tterns in adolescent idiopathic scoliosis(AIS)patients in comparison to the fron tal plane spinal configuration and to report changes to the... 详细信息

关键词：治疗脊椎指压疗法脊柱侧凸麻醉

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出版经济论

出版发行研究 1990年第5期 60-64页

作者： d.c.史密斯季风国际文化出版公司

图书出版商就是图书投资商。出版商一方面向作者、译者、美工人员、编辑、印刷商、造纸商及参与图书生产的其他人员如销售人员、广告宣传人员支付工资或费用;另一方面从书商和那些购买图书或购买图书内容使用权的人们那里获得收入。

关键词：出版理论经济学

A numerical investigation into key factors controlling hard rock excavation via electropulse stimulation

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第4期12卷 793-801页

作者： daniel Vogler Stuart dcWalsh Martin OSaar Geothermal Energy and Geofluids Institute of GeophysicsETH ZurichZurichSwitzerland department of civil Engineering Monash UniversityMelbourneAustralia department of Earth and Environmental Sciences University of MinnesotaMinneapolisUSA

Electropulse stimulation provides an energy-efficient means of excavating hard rocks through repeated application of high voltage pulses to the rock *** such,it has the potential to confer significant advantages to mining and drilling operations for mineral and energy ***,before these benefits can be realized,a better understanding of these processes is required to improve their deployment in the *** this paper,we employ a recently developed model of the grain-scale processes involved in electropulse stimulation to examine excavation of hard rock under realistic operating *** that end,we investigate the maximum applied voltage within ranges of 120e600 kV,to observe the onset of rock *** further study the effect of grain size on rock breakage,by comparing fine(granodiorite)and.c.arse grained(granite)***,the pore fluid salinity is investigated,since the electric cond.c.ivity of the pore fluid is shown to be a governing factor for the electrical cond.c.ivity of the modeled *** study demonstrates that all investigated factors are crucial to the efficiency of rock fragmentation by electropulsing.

关键词： Electropulse stimulation High voltage breakdown Numerical modeling drilling Thermo-mechanics