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电感耦合等离子体质谱法进样技术研究

光谱学与光谱分析 1992年第3期12卷 59-64页

作者： Van Loon jon c. Parkc.JPaudynA.B. 王宗孝李永涛东北师范大学东北师范大学分析测试中心长春130024

电感耦合等离子体质谱(IcP-MS)是近年发展起来的新型痕量元素分析技术,可以用于检出限为pg/ml级的痕量元素及天然同位素分析,同位素比分析及常规同位素稀释质谱分析等。所有这些应用都显示出IcP-MS在痕量元素分析领域中具有无与伦比的... 详细信息

电感耦合等离子体质谱(IcP-MS)是近年发展起来的新型痕量元素分析技术,可以用于检出限为pg/ml级的痕量元素及天然同位素分析,同位素比分析及常规同位素稀释质谱分析等。所有这些应用都显示出IcP-MS在痕量元素分析领域中具有无与伦比的优点。

关键词： IcP-MS 进样技术电热蒸发

Using physiological conditions to assess current and future habitat use of a Subarctic frog

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Integrative Zoology 2023年第1期18卷 2-14页

作者： Thomas P.HASTINGS Blake R.HOSSAcK LeeAnn FISHBAcK jon M.DAVENPORT Department of Biology Appalachian State UniversityBooneNorth CarolinaUSA U.S.Geological Survey Northern Rocky Mountain Science Centerand Wildlife Biology ProgramW.A.Franke College of Forestry&ConservationUniversity of MontanaMissoulaMontanaUSA churchill Northern Studies centre ChurchillManitobaCanada

Species with especially close dependence on the environment to meet physiological requirements,such as ectotherms,are highly susceptible to the impacts of climate *** change is occurring rapidly in the Subarctic and Arctic,but there is limited knowledge on ectotherm physiology in these *** investigated how environmental conditions and habitat characteristics inﬂuence the physiological conditions and habitat use of wood frogs(Rana sylvatica)in a Subarctic landscape near churchill,Manitoba(canada).We used plaster models to estimate water loss rates and surface body temperatures among different habitat types and at speciﬁc locations used by radio-tracked *** loss(R2=0.67)and surface temperature(R2=0.80)of plaster models was similar to that of live ***-based water loss rates were greater in tundra habitat than in boreal forest and ecotone *** use of wood frogs was strongly tied with available surface moisture and decreased water loss rates that were observed with plaster *** conditions,such as wind speed and ground tem-perature,explained 58%and 91%of the variation in water balance and temperature of plaster *** physiological conditions may be challenging for semi-aquatic ectotherms in environments vulnerable to future cli-mate *** ability to predict physiological conditions based on environmental conditions,as demonstrated in our study,can help understand how wildlife will respond to climatic changes.

关键词： Arctic climate change landscape physiology water balance wood frog

Dual Phase Renewable Fuel combustion in an Atmospheric Gas Turbine Burner

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Journal of Thermal Science 2023年第3期32卷 1278-1291页

作者： AGWU Ogbonnaya RUNYON jon GOKTEPE Burak cHONG TUNG cheng NG Jo-Han GILES Anthony VALERA-MEDINA Agustin School of Engineering Cardiff UniversityWales CF243AAUK china-UK Low carbon college Shanghai Jiao Tong UniversityLin'gang 201306China Faculty of Engineering and Physical Sciences University of Southampton MalaysiaIskandar Puteri 79100Malaysia

Expanding the fuel flexibility of continuous combustion systems to include multiphase fuel combustion offers additional support to combat the problem of energy security and,potentially,environmental *** this study,apart from establishing stability limits and measuring post-combustion emissions,flames generated from simultaneous combustion of biodiesel and syngas were examined using c_(2)*and cH*chemiluminescence imaging to capture changes in the reaction *** proportion of syngas in the fuel mix was varied from 0 to 30%content(by energy contribution)while maintaining a total power output of 15 *** overall equivalence ratio was held at 0.7 in cases other than for determining the flammability *** results indicate a reduction of stability limits as gas proportion in fuel blend ***,chemiluminescence imaging of the two targeted species suggest a general reduction in reaction rate as well as reaction zone area and length with increase in gas ratio in the dual phase ***,emissions performance in the context of NOxand cO was investigated as liquid-to-gas ratios were ***,the study demonstrates the feasibility,limitations and potential benefits of multiphase renewable fuel combustion in a swirl-stabilised burner.

关键词： dual fuel gas turbine multiphase combustion

Mafic Archean continental crust prohibited exhumation of orogenic UHP eclogite

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Geoscience Frontiers 2021年第5期12卷 411-420页

作者： Richard M.Palin James D.P.Moore Zeming Zhang Guangyu Huang jon Wade Brendan Dyck Department of Earth Sciences University of OxfordOxford OX13ANUnited Kingdom Earth Observatory of Singapore Nanyang Technological UniversitySingapore Institute of Geophysics SGEESVictoria University of WellingtonWellingtonNew Zealand Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Department of Earth Environmental and Geographical SciencesUniversity of British ColumbiaKelowna V1V 1V7Canada

The absence of ultrahigh pressure(UHP)orogenic eclogite in the geological record older than c.0.6 Ga is problematic for evidence of subduction having begun on Earth during the Archean(4.0-2.5 Ga).Many eclogites in Phanerozoic and Proterozoic terranes occur as mafic boudins encased within low-density felsic crust,which provides positive buoyancy during subduction;however,recent geochemical proxy analysis shows that Archean continental crust was more mafic than previously thought,having greater proportions of basalt and komatiite than modern-day ***,we show via petrological modelling that secular change in the petrology and bulk composition of upper continental crust would make Archean continental terranes negatively buoyant in the mantle before reaching UHP *** or delaminated Archean continental crust passes a point of no return during metamorphism in the mantle prior to the stabilization of coesite,while Proterozoic and Phanerozoic terranes remain positively buoyant at these *** orogenic eclogite may thus readily have formed on the Archean Earth,but could not have been exhumed,weakening arguments for a Neoproterozoic onset of subduction and plate ***,isostatic balance calculations for more mafic Archean continents indicate that the early Earth was covered by a global ocean over 1 km deep,corroborating independent isotopic evidence for large-scale emergence of the continents no earlier than c.3 *** findings thus weaken arguments that early life on Earth likely emerged in shallow subaerial ponds,and instead support hypotheses involving development at hydrothermal vents in the deep ocean.

关键词： Archean Eclogite Exhumation Secular change Geodynamics Density

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高级TcP/IP编程

Short-Term Disturbance Effects of Outdoor Education Stream classes on Aquatic Macroinvertebrates

2001年

作者：（美）jon c.Snader 刘江林译

本书涉及了网络编程的所有细节，通过对TcP/IP编程精细部分的分析，帮助读者理解网络协议内部是如何与应用程序交互的。

ISBN: (纸本)7508306619

本书涉及了网络编程的所有细节，通过对TcP/IP编程精细部分的分析，帮助读者理解网络协议内部是如何与应用程序交互的。

关键词：互连网络学科:协议计算机学科:程序设计协议程序设计

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Journal of Environmental Protection 2017年第11期8卷 1333-1353页

作者： jon P. Bossley Peter c. Smiley Smiley Jr. Environmental Science Graduate Program The Ohio State University Columbus OH USA School of Natural and Social Sciences Mount Vernon Nazarene University Mount Vernon OH USA USDA Agricultural Research Service Soil Drainage Research Unit Columbus OH USA

Outdoor education programs frequently offer stream classes that teach students how to assess water quality based on the composition of aquatic macroinvertebrate communities. Repeatedly using the same site for stream classes can cause disturbance that could negatively impact aquatic macroinvertebrates. However, the impact of outdoor education stream classes on short term temporal trends of aquatic macroinvertebrates has not been evaluated. Our objective was to quantify whether outdoor education stream classes caused localized and short-term impacts on the aquatic macroinvertebrate community. We sampled aquatic macroinvertebrates over a five day period in May 2014 from an impacted riffle subjected to repeated substrate disturbance by outdoor education stream classes and an unimpacted riffle that was not subjected to stream classes within an agricultural stream in central Ohio. We did not observe a difference in macroinvertebrate community response variables between different time periods or among days within the impacted riffle as part of our within riffle analysis. We documented that macroinvertebrate abundance and dorsoventrally flattened clinger abundance was greater within the unimpacted riffle than the impacted riffle. Macroinvertebrate evenness was greater in the impacted riffle than the unimpacted riffle. In the impacted riffle percent clingers was greater on Monday than on Friday. conversely, in the unimpacted riffle percent clingers was greater on Friday than on Monday. Our results indicated that outdoor education stream classes did not alter short term temporal trends of macroinvertebrate community structure within an impacted riffle, but the stream classes resulted in differences in community structure between an impacted and unimpacted riffle. Our results suggest that outdoor education centers should avoid repeatedly using the same site for their stream classes to prevent negatively impacting aquatic macroinvertebrates.

关键词： Substrate Disruption Trampling Macroinvertebrate community Riffles

INVESTIGATIONS OF THE SETTING BEHAVIOUR OF QUIcK cEMENTS FROM THE SYSTEM c3S-c11A7·caF2-c2(A,F)

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INVESTIGATIONS OF THE SETTING BEHAVIOUR OF QUICK CEMENTS FRO...

Toxic Effects of Three Heavy Metallic Ions on Rana zhenhaiensis Tadpoles

第三届北京国际水泥与混凝土学术会议

作者： D. kn fel Laboratory for chemistry of construction Materials University Siegen Siegen Germany

The setting behaviour of quick cements form the system c3S-c11A7·caF2-c2(A,F) has been investigated. Apart from testing the setting times, the absorbed quantities of water, the water soluble ion concentrations of the cement stones and the mechanical strength were determined as well as x-ray diffraction analysis was done. The results showed that the setting behaviour of quick cements does depend both on its phases mixture as well as on the adding of a setting retarder. Through a simultaneous adding of a setting retarder and of portland cement, the setting time can be more than doubled and the mechanical strength can also be supported. The sole adding of a setting retarder or of portland cement does not show any distinct setting retardation. The setting retarder seems to accelerate the hydration of the quick cement, but after the very rapid initial hydration, a distinct retardation immediately follows. The setting retardation could be put down to a rapid formation of an ettringite shell on the aluminate phase which contains fluoride.

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Asian Herpetological Research 2015年第2期6卷 132-142页

作者： Li WEI Guohua DING Sainan GUO Meiling TONG Wenjun cHEN jon FLANDERS Weiwei SHAO Zhihua LIN college of Ecology Lishui University School of Biological Sciences Bristol Life Sciences Building University of Bristol

Heavy metal pollution is widespread in some areas of china and results in contamination of land, water, and air with which all living organisms interact. In this study, we used three heavy metallic ions （cu^2＋, Pb^2＋ and Zn^2＋） to assess their toxicity effects on mortality, blood biomarker and growth traits （body length and body mass） of Rana zhenhaiensis tadpoles. The results showed that the toxicity levels of the three metallic ions were different when conducted with different experiment designs. For acute toxicity tests, cu^2＋ was the most toxic with the highest tadpole mortality. The mortalities of tadpoles showed significant differences among the treatments at the same exposure time endpoints （24, 48, 72 and 96h）. Results from repeated measures ANOVA indicated that metallic ion concentration, exposure time and their interactions significantly affected the mortalities of R. zhenhaiensis tadpoles. Also, the toxicity effects of all binary combinations of the three metallic ion treatments showed synergism. The half lethal concentrations （Lcs0） decreased with increasing exposure time during the experimental period, and the safe concentration （Sc）values of cu^2＋, Pb^2＋ and Zn^2＋ were different from each other. combined and compared Lc50 values with previous data reported, it is suggestes that the toxicity levels of metal pollution to anuran tadpoles should be species-and age-related. For blood biomarker tests, Zn^2＋ was the most toxic with the highest total frequencies of abnormal erythrocytic nucleus. All three metallic ions caused higher abnormal erythrocytic nucleus compared with control groups. In a chronic toxicity test, Pb^2＋ was the most toxic with lowest growth traits. Survival rate （except for 18 days）, total body length and body mass showed significant differences among the treatments. These findings indicated that tadpoles of R. zhenhaiensis should be as a bioindicator of heavy metals pollution.

关键词： Acute toxicity micronuclcus chronic toxicity growth metal pollution Rana zhenhaiensis

Evolution of nc_(16)H_(34)-water-mineral systems in thermal capsules and geological implications for deeply-buried hydrocarbon reservoirs

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Geoscience Frontiers 2022年第2期13卷 139-158页

作者： Guang-Hui Yuan Zi-Hao Jin Ying-chang cao Ke-Yu Liu jon Gluyas Yan-Zhong Wang Ke-Lai Xi Key Laboratory of Deep Oil and Gas School of GeosciencesChina University of PetroleumQingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyNo.62Fuzhou South RoadQingdao 266071China Department of Earth Sciences Durham UniversityDurham DH13LEUK

Organic-inorganic interactions between hydrocarbons and most minerals in deeply buried reservoirs remain *** this study,gold capsules and fused silica capillary capsules(FSccs)with different com-binations of nc_(16)H_(34),water(distilled water,cacl_(2) water)and minerals(quartz,feldspar,calcite,kaolinite,smectite,and illite)were heated at 340℃ for 3-10 d,to investigate the evolution and reaction pathways of the organic-inorganic interactions in different hot *** heating,minerals exhibited little alteration in the anhydrous *** alterations,how-ever,occurred obviously in the hydrous *** inorganic components affected nc_(16)H_(34) degra-dation ***,water promoted the free-radical thermal-cracking reaction and step oxidation reaction but suppressed the free-radical cross-linking *** impact of cacl_(2) water on the nc_(16)H_(34) degradation was weaker than the distilled water as high ca^(2+)concentration suppressed the formation of free *** presence of different waters also affects the impact of different minerals on nc_(16)H_(34) degradation,via its impact on mineral *** the anhydrous nc_(16)H_(34)-mineral systems,calcite and clays catalyzed generation of low-molecular-weight(LMW)alkanes,particularly the ***,feldspar,and calcite catalyzed generation of high-molecular-weight(HMW)alkanes and PAHs,whereas clays catalyzed the generation of LMW alkanes and mono-bicyclic aromatic hydrocarbons(M-BAHs).In the hydrous nc_(16)H_(34)-distilled water-mineral systems,all minerals but quartz promoted nc_(16)H_(34) degra-dation to generate more LMW alkanes,less HMW alkanes and *** the nc_(16)H_(34)-cacl_(2) water-mineral systems,the promotion impact of minerals was weaker than that in the systems with distilled *** study demonstrated the generation of different hydrocarbons with different fluorescence colors in the different nc_(16)H_(34)-water-mineral systems after heating for t

关键词： nc_(16)H_(34)-water-mineral systems Organic-inorganic interactions Hydrocarbon degradation Mineral alteration Deeply buried hot reservoirs