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Dendroclimatic analysis of white pine (Pinus strobus L.)using long-term provenance test sites across eastern North America

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Forest Ecosystems 2018年第3期5卷 221-235页

作者： Sophan chhin Ronald S.Zalesny Jr william c.parker John Brissette Division of Forestry and Natural Resources West Virginia University322 Percival HallPO Box 6125MorgantownWV26506USA USDA Forest Service Northern Research Station5985Highway KRhinelanderWI 54501USA Ontario Forest Research Institute 1235Queen St.ESault Ste.MarieON P6A 2E5Canada USDA Forest Service Northern Research Station271Mast RoadDurhamNH 03824USA

Background: The main objective of this study was to examine the climatic sensitivity of the radial growth response of 13 eastern white pine(Pinus strobus L.) provenances planted at seven test sites throughout the northern part of the species’ native distribution in eastern North ***: The test sites(i.e., Wabeno, Wisconsin, USA; Manistique, Michigan, USA; Pine River, Michigan, USA; Newaygo,Michigan, USA; Turkey Point, Ontario, canada; Ganaraska, Ontario, canada; and Orono, Maine, USA) examined in this study were part of a range-wide white pine provenance trial established in the early 1960 s in the eastern United States and canada. Principal components analysis(PcA) was used to examine the main modes of variation [first(Pc1) and second(Pc2) principal component axes] in the standardized radial growth indices of the provenances at each test *** year scores for Pc1 and Pc2 were examined in relation to an array of test site climate variables using multiple regression analysis to examine the commonality of growth response across all provenances to the climate of each test site. Provenance loadings on Pc1 and Pc2 were correlated with geographic parameters(i.e., latitude, longitude,elevation) and a suite of biophysical parameters associated with provenance origin ***: The amount of variation in radial growth explained by Pc1 and Pc2 ranged from 43.4% to 89.6%. Dendroclimatic models revealed that white pine radial growth responses to climate were complex and differed among sites. The key dendroclimatic relationships observed included sensitivity to high temperature in winter and summer, cold temperature in the spring and fal(i.e., beginning and end of the growing season), summer moisture stress, potential sensitivity to storminduced damage in spring and fal, and both positive and negative effects of higher winter snowfal. Separation of the loadings of provenances on principal component axes was mainly associated with temperature-related bioclima

关键词： Adaptation climate change Dendrochronology Seed source

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Fusion genes in solid tumors: an emerging target for cancer diagnosis and treatment

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chinese Journal of cancer 2013年第11期32卷 594-603页

作者： Brittany c.parker Wei Zhang Department of Pathology Unit 85The University of Texas MD Anderson Cancer CenterHoustonTX 77030USA The University of Texas Graduate School of Biomedical Sciences HoustonTX 77030USA

Studies over the past decades have uncovered fusion genes, a class of oncogenes that provide immense diagnostic and therapeutic advantages because of their tumor-specific expression. Originally associated with hemotologic cancers, fusion genes have recently been discovered in a wide array of solid tumors, including sarcomas, carcinomas, and tumors of the central nervous system. Fusion genes are attractive as both therapeutic targets and diagnostic tools due to their inherent expression in tumor tissue alone. Therefore, the discovery and elucidation of fusion genes in various cancer types may provide more effective therapies in the future for cancer patients.

关键词：融合基因癌症患者治疗性实体瘤肿瘤组织中枢神经系统诊断工具特异性表达

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First principles insights into oxide/polymer composites: SrTiO_(3) /polyaniline/graphene

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Journal of Materials Science & Technology 2023年第35期166卷 250-260页

作者： Nathan D.Wood Joshua S.Tse Jonathan M.Skelton David J.cooke Lisa J.Gillie Stephen c.parker Marco Molinari Department of chemical Sciences School of Applied SciencesUniversity of HuddersfieldHuddersfield HD13DHUK Department of chemistry University of ManchesterManchester M139PLUK Department of chemistry University of BathBath BA27AYUK

A detailed computational investigation,based on density functional theory,of the interaction of polyani-line(PANI)and graphene nanoribbons(GNRs)with SrTiO_(3) is *** adsorption of PANI in var-ious oxidation states and co-adsorption with GNRs is found to be thermodynamically ***-sorbed PANI introduces N and c 2p states into the SrTiO_(3) bandgap,while co-adsorption of PANI and GNRs leads to a bridging of the gap and semi-metallic behaviour,thus rendering the electrical properties highly sensitive to the loading of the GNRs/PANI in the *** the lattice dynamics of the composites predicts a 68-88%reduction in the lattice thermal conductivity due to reduced phonon group *** together,these findings provide insight into the growing number of experimental studies highlighting the enhanced thermoelectric performance of oxide-polymer composites and indicate co-adsorption with graphene as a facile direction for future research.

关键词： Polymer/inorganic composites Polyaniline/strontium titanate/graphene nanoribbon composites PANI/GNR/SrTiO_(3)composites Thermoelectric composites Electrical transport Thermal conductivity1 Introduction

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Oxygen isotopic variations in modern cetacean teeth and bones： implications for ecological, paleoecological, and paleoclimatic studies

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Science Bulletin 2016年第1期61卷 92-104页

作者： Burcu ciner Yang Wang william parker Department of Earth Ocean and Atmospheric Scienceand National High Magnetic Field LaboratoryFlorida State UniversityTallahasseeFLUSA Department of Geological Engineering Balikesir UniversityBalikesirTurkey department of earth ocean and atmospheric scienceflorida state universityTallahasseeFLUSA

The oxygen isotope ratios （δ18O） preserved in marine sediments have been widely used to reconstruct past ocean temperatures. However, there remain significant uncertainties associated with this method, owing to assumptions about the δ18O of ancient seawater which affects the temperature inferred from sediment δ18O records. In this study, oxygen isotope compositions of phosphate in teeth and bones from five different modem cetacean species, including sperm whale, pygmy sperm whale, short-finned pilot whale, killer whale, and cuvier＇s beaked whale, and three fossil whales were determined. The data were used to assess whether the oxygen isotope ratios of biogenic phosphate （δ18Op） from cetaceans are a reliable proxy for the oxygen isotopic composition of ocean water （δ18Ow）. The δ18Op values of modem cetaceans range from 15.5 ‰ to 21.3 ‰, averaging （19.6 ‰ ±0.8 ‰）（n = 136）.Using a greatly expanded global cetacean δ18Op dataset, the following regression equation is derived for cetaceans： δ18Ow = 0.95317 （4-0.03293） δ18Op- 17.971 （＋0.605）, r = 0.97253. The new equation, when applied to fossil teeth and bones, yielded reasonable estimates of ancient seawater δ18Ow values. Intra-tooth isotopic variations were observed within individual teeth. Among the selected species, the killer whale （O. orca） has largest intra-tooth δ18Op preference and migratory the lowest δ18Op values and the variation, reflecting its habitat behavior. The results show that oxygen isotope analysis of phosphate in cetacean teeth and dense ear bones provides a useful tool for reconstructing the oxygen isotopic composition of seawater and for examining environmental preferences （including migratory behavior） of both modem and ancient whales.

关键词： Oxygen isotopes Phosphate cetacean Whales Teeth Bones

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cALcULATION OF THE cRYSTAL STRUcTURE AND THERMODYNAMIc PROPERTIES OF OXIDES AND MINERALS USING FREE-ENERGY MINIMISATION TEcHNIQUES

CALCULATION OF THE CRYSTAL STRUCTURE AND THERMODYNAMIC PROPE...

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Sixteenth congress of the International Union of crystallography

作者： Stephen c.parker Alison Wall School of chemistry University of BathClaverton DownBathUK

＜正＞The aim of this work is to develop reliable simulation techniques which can predict the structural and physical properties of oxides and minerals at varying minimisation,in which the structural parameters are varied until the configuration with lowest energy is *** important development is that lattice dynamics are employed to calculate the vibrational behaviour and hence the thermodynamic properties including heat capacities and *** studies have shown

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Effects of environmental stressors on stem cells

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World Journal of Stem cells 2019年第9期11卷 565-577页

作者： Jessica R Worley Graham c.parker Department of Pediatrics Wayne State University School of Medicine

Environmental toxicants are ubiquitous,and many are known to cause harmful health ***,much of what we know or think we know concerning the targets and long-term effects of exposure to environmental stressors is sadly *** exposure may have health effects that are currently mischaracterized or at least mechanistically incompletely *** much of the recent excitement about stem cells(Scs)focuses on their potential as therapeutic agents,they also offer a valuable resource to give us insight into the mechanisms and risks of toxicant *** only as a response to the increasing ethical pressure to reduce animal testing,Sc studies allow us valuable insight into the true effects of human exposure to environmental stressors under controlled *** present a review of the history of publications on the effects of environmental stressors on Scs,followed by a consolidation of the literature over the past five years on a subset of key environmental stressors of importance to human health and their effects on both embryonic and tissue *** review will make constructive suggestions as to areas of toxicant research where further studies are needed,as well as making indications of the potential utility for advancing knowledge and directing research on environmental toxicology.

关键词： Environmental substances Toxic Stem cells Endocrine disruptors Alcohols Tobacco smoking Metals Heavy Particulate matter Volatile organic compounds Ozone

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There is no real evidence for a diminishing trend of the Atlantic meridional overturning circulation

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Journal of Ocean Engineering and Science 2016年第1期1卷 30-35页

作者： A.parker c.D.Ollier School of Engineering and Physical Science James Cook UniversityTownsvilleQLDAustralia School of Earth and Environment University of Western AustraliaCrawley WAAustralia

The Atlantic Meridional Overturning circulation(AMOc)is part of the great ocean“conveyor belt”that circulates heat around the *** the early 2000s,ocean sensors have started to monitor the AMOc,but the measurements are still far from accurate and the time window does not permit the separation of short term variability from a longer term *** works have claimed that global warming is slowing down the AMOc,based on models and proxies of *** other observations demonstrate a stable circulation of the *** using tide gauge data complementing recent satellite and ocean sensor observations,the stability of the AMOc is shown to go back to *** is concluded that no available information has the due accuracy and time coverage to show a clear trend outside the inter-annual and multi-decadal variability in the direction of increasing or decreasing strength over the last decades.

关键词： Ocean circulation conveyor belt Global warming climate change.

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用非常规化学药剂防除杂草

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世界农药 1985年第2期 14-18+27页

作者： c.parker 阮朗英国农业研究委员会杂草研究组织

虽然现在常规合成除草剂范围愈来愈广泛,然而杂草问题仍继续变化并面临新的挑战。对付这些问题的新除草剂开发得很慢,部份原因是毒性试验问题,为此需要评价一些新的替代途径。本文在"非常规"药剂名单中着重讨论熏蒸剂(源于合成但作用方... 详细信息

虽然现在常规合成除草剂范围愈来愈广泛,然而杂草问题仍继续变化并面临新的挑战。对付这些问题的新除草剂开发得很慢,部份原因是毒性试验问题,为此需要评价一些新的替代途径。本文在"非常规"药剂名单中着重讨论熏蒸剂(源于合成但作用方式不同)、天然毒素(常规应用而来源不同)、生长调节剂(单独作用或用以提高除草剂药效)和除草剂安全剂(改进常规除草剂的选择性)。

关键词：除草剂安全剂杂草种子防除杂草真菌除草剂野燕麦燕麦草硫威钠异株克生非常规

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Atmospheric and kinetic studies of OH and HO_2 by the FAGE technique

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Journal of Environmental Sciences 2012年第1期24卷 78-86页

作者： D.Amedro K.Miyazaki A.parker c.Schoemaecker c.Fittschen Laboratoire Pc2A Universit de Lille 1- Ba timent C1159655 Villeneuve d'AscqFrance Department of Applied chemistry Tokyo Metropolitan UniversityJapan

A new FAGE setup has recently been built at the University of Lille,*** permits the quantification of OH and HO 2 in the atmosphere with a detection limit of 3×10 5 molecules/（cm 3 ·min） for OH and 1×10 6 molecules/（cm 3 ·min） for HO *** coupling to a photolysis cell enables the measurement of the total reactivity of the hydroxyl radical in ambient air and kinetic studies in *** configurations have been considered：one with the photolysis cell at 90° to the FAGE nozzle,the other on line with the FAGE *** two configurations have been tested and validated by measuring the well known rate constants of OH with cH 4,c 3 H 8 and *** advantages and drawbacks of each configuration have been *** ＂on line＂ configuration limits losses and permits measurements over a larger reactivity range but is affected by OH formation from the laser beam striking the FAGE nozzle,thus limiting the ability to carry out energy dependence studies which can,in contrast,be successfully performed in the 90° configuration.

关键词： OH kinetic reactivity laser induced fluorescence

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造价低廉的鱼苗鱼体自动投饵机

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渔业机械仪器 1990年第4期17卷 10-13页

作者： Nick c.parker 高健

饵料是影响游钓渔业中养殖大规格鱼类和商业性饵料工厂生产的最重要因素.但是,与养殖鱼类生殖群体,产卵和孵化过程中所需的饵料价值相比,鱼苗与鱼种的饵料造价并不显得十分重要.同时,商业养殖场和国家孵化场所需要的苗种饵料量也较少.因... 详细信息

饵料是影响游钓渔业中养殖大规格鱼类和商业性饵料工厂生产的最重要因素.但是,与养殖鱼类生殖群体,产卵和孵化过程中所需的饵料价值相比,鱼苗与鱼种的饵料造价并不显得十分重要.同时,商业养殖场和国家孵化场所需要的苗种饵料量也较少.因此,开发适用于定量投饲鱼苗鱼种的自动投饵机的工作几乎没有引起重视.关于用自动—需要型投饵机投饲(Greenland与 Gill 等,1979)或定时投饵的益处(Stater,

关键词：鱼苗鱼体自动投饵机投耳机

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