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Geomorphic predictors of riparian vegetation in small mountain watersheds

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Journal of Plant Ecology 2015年第6期8卷 593-604页

作者： Blake M.Engelhardt Jeanne c.chambers peter J.Weisberg Department of Natural Resources and Environmental Science University of NevadaMS 1861664 Virginia StreetRenoNV 89557USA USDA Forest Service Rocky Mountain Research Station920 Valley RoadRenoNV 89512USA

Aims Hydrogeomorphic processes operating at watershed,process zone and site scales influence the distribution of riparian ***,most studies examining the relationships between hydrogeomorphic processes and riparian vegetation are conducted at site *** quantified the relative importance of watershed,process zone and site geomorphic characteristics for predicting riparian plant community types and plant species abundances in four small mountain watersheds in central Nevada,*** We mapped riparian vegetation types and identified process zones(based on dominant geomorphic process and valley fill material)within the *** sampled sites in each combination of veg-etation type and process zone(n=184 sites)and collected data on watershed scale factors,valley and stream geomorphic characteristics and on plant cover of each geomorphic *** community types were defined by cluster and indicator species analyses of plant cover data,and related to geomorphic variables using ordination analysis(nonmetric multidimensional scaling).linear mixed effects models were used to predict abundances of indicator *** Findings Variables describing position in the watershed(elevation,contrib-uting area)that are related to gradients of temperature,moisture and stream discharge were of primary importance in predicting plant community *** describing local geomorphic setting(valley width,stream gradient,channel sediments,geomor-phic surface height)were of secondary importance,but accurately described the geomorphic setting of indicator *** process zone classification did not include position in the watershed or channel characteristics and only predicted plant community types with unique geomorphic *** small mountain watersheds,predicting riparian vegetation distribution requires explicit consid-eration of scale and geomorphic context within and among water-sheds in addition to site variables.

关键词： great basin multiscale plant community analysis process zone riparian

Endovascular thrombectomy for stroke: current best practice and future goals

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Stroke & Vascular Neurology 2016年第1期1卷 16-22页

作者： Bruce c V campbell Geoffrey A Donnan peter J Mitchell Stephen M Davis Department of Medicine and Neurology Melbourne Brain Centre at the Royal Melbourne HospitalUniversity of MelbourneParkvilleVictoriaAustralia The Florey Institute of Neuroscience and Mental Health University of MelbourneParkvilleVictoriaAustralia Department of Radiology Royal Melbourne HospitalUniversity of MelbourneParkvilleVictoriaAustralia

Endovascular thrombectomy for large vessel ischaemic stroke substantially reduces disability,with recent positive randomised trials leading to guideline changes *** review discusses in detail the evidence provided by recent randomised trials and metaanalyses,the remaining areas of uncertainty and the future directions for *** data from existing trials have demonstrated the robust benefit of endovascular thrombectomy for internal carotid and proximal middle cerebral artery *** remains for more distal occlusions where the efficacy of alteplase is greater,less tissue is at risk and the safety of endovascular procedures is less *** artery occlusion was excluded from the trials,but with a dire natural history and proof of principle that rapid reperfusion is effective,it seems reasonable to continue treating these patients pending ongoing trial *** has been no evidence of heterogeneity in treatment effect in clinically defined subgroups by age,indeed,those aged>80 years have at least as great an overall reduction in disability and reduced *** there was no heterogeneity across the range of baseline stroke severities included in the *** that routine use of general anaesthesia reduces the benefit of endovascular thrombectomy is increasing and conscious sedation is generally preferred unless severe agitation or airway compromise is *** impact of time delays has become clearer with description of onset to imaging and imaging to reperfusion *** in the onset to imaging reduce the proportion of patients with salvageable brain ***,in the presence of favourable imaging,rapid treatment appears beneficial regardless of the onset to imaging time *** to reperfusion delays lead to decay in the clinical benefit achieved,particularly in those with less robust collateral *** brain imaging options to assess prognosis have various advantages and disadvan

关键词： routine epoch benefit

Statin, testosterone and phosphodiesterase 5-inhibitor treatments and age related mortality in diabetes

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World Journal of Diabetes 2017年第3期8卷 104-111页

作者： Geoffrey Hackett peter W Jones Richard c Strange Sudarshan Ramachandran Department of Urology University of Bed-fordshire Department of Urology Heart of England NHS Foundation Trust Metabolic Research Group Institute of Science and Technology in Medicine Keele University Department of clinical Biochemistry Heart of England NHS Foundation Trust Department of clinical Biochemistry University Hospitals of North Midlands/Faculty of Health Sciences Staffordshire University

AIMTo determine how statins, testosterone (T) replacement therapy (TRT) and phosphodiesterase 5-inhibitors (PDE5I) influence age related mortality in diabetic *** studied 857 diabetic men screened for the BLAST study, stratifying them (mean follow-up = 3.8 years) into: (1) Normal T levels/untreated (total T > 12 nmol/L and free T > 0.25 nmol/L), Low T/untreated and Low T/treated; (2) PDE5I/untreated and PDE5I/treated; and (3) statin/untreated and statin/treated groups. The relationship between age and mortality, alone and with T/TRT, statin and PDE5I treatment was studied using logistic regression. Mortality probability and 95%cI were calculated from the above models for each *** was associated with mortality (logistic regression, OR = 1.10, 95%cI: 1.08-1.13, P ctors included, age (OR = 1.08, 95%cI: 1.06-1.11, P cI: 0.15-0.92, P = 0.033), PDE5I/treated (OR = 0.17, 95%cI: 0.053-0.56, P = 0.004) and statin/treated (OR = 0.59, 95%cI: 0.36-0.97, P = 0.038) were associated with lower mortality. Age related mortality was as described by Gompertz, r2 = 0.881 when Ln (mortality) was plotted against age. The probability of mortality and 95%cI (from logistic regression) of individuals, treated/untreated with the drugs, alone and in combination was plotted against age. Overlap of 95%cI lines was evident with statins and TRT. No overlap was evident with PDE5I alone and with statins and TRT, this suggesting a change in the relationship between age and *** show that statins, PDE5I and TRT reduce mortality in diabetes. PDE5I, alone and with the other treatments significantly alter age related mortality in diabetic men.

关键词： Type 2 diabetes Mortality Gompertz-Makeham equation Phosphodiesterase 5 inhibitors Male hypogonadism Statins Testosterone replacement therapy

Esports players,got muscle?competitive video game players’physical activity,body fat,bone mineral content,and muscle mass in comparison to matched controls

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Journal of Sport and Health Science 2022年第6期11卷 725-730页

作者： Joanne DiFrancisco-Donoghue William G.Werner peter c.Douris Hallie Zwibel Department of Osteopathic Medicine New York Institute of Technology College of Osteopathic Medicine(NYIT-COM)Old WestburyNY 11568USA center for Sports Medicine NYIT-COMOld WestburyNY 11568USA Department of Physical Therapy NYITOld WestburyNY 11568USA Department of Family Medicine NYIT-COMOld WestburyNY 11568USA

Background:Esports players,like traditional athletes,practice for long hours and,thus,are vulnerable to the negative health effects of prolonged *** is a lack of research on the physical activity and the health ramifications of prolonged sitting by competitive *** purpose of this study was to investigate activity levels,body mass index(BMI),and body composition in collegiate esports players as compared to agematched ***:Twenty-four male collegiate esports players and non-esports players between 18 and 25 years of age signed a written consent to *** activity was examined using daily activity(step count)with a wrist-worn activity tracker.A questionnaire assessing physical activity was also *** outcomes included body-fat percentage,lean-body mass,BMI,and bone mineral content measured using dual X-ray ***:The step count in the esports players was significantly lower than the age-matched controls(6040.2±3028.6 vs.12843.8±5661.1;p=0.004).Esports players exhibited greater body-fat percentage(p=0.05),less lean body mass(p=0.003),and less bone mineral content(p=0.03),despite no difference in BMI between the esports and non-esports ***:As compared to non-esports players,collegiate esports players were significantly less active and had a higher body-fat percentage,with lower lean body mass and bone mineral *** BMIs showed no difference between the 2 *** athletes displayed significantly less activity and poor body composition,which are all correlated with potential health issues and risk of *** did not capture this difference and should not be considered as an accurate measure of health in competitive esports players.

关键词： Body composition Body mass index Gaming

The Voisey's Bay Ni-cu-co Sulfide Deposit, Labrador, canada: Emplacement of Silicate and Sulfide-Laden Magmas into Spaces created within a Structural corridor

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西北地质 2012年第4期45卷 17-38页

作者： peter c.Lightfoot Dawn Evans-Lamswood Robert Wheeler Vale ExplorationHighway 17 WestSudburyOntarioP0M 1N0Canada Vale Newfoundland and Labrador Limited Bally Rou Place280Torbay RoadSuite W200St.John'sNewfoundlandA1A 3W8Canada

The Voisey's Bay Ni-cu-co sulfide deposit is hosted in a 1.34 Ga mafic intrusion that is part of the Nain Plutonic Suite in Labrador, *** Ni-cu-co sulfide mineralization is associated with magmatic breccias that are typically contained in weakly mineralized olivine gabbros, troctolites and ferrogabbros, but also occur as veins in adjacent *** mineralization is associated with a dyke-like body which is termed the feeder *** dyke connects the shallow differentiated Eastern Deeps chamber in the east to a deeper intrusion in the west termed the Western Deeps *** the conduit is connected to the Eastern Deeps Intrusion, the Eastern Deeps Deposit is developed at the entry line of the dyke along the steep north wall of the Eastern Deeps *** Eastern Deeps Deposit is surrounded by a halo of moderately to weakly mineralized Variable-Textured Troctolite (VTT) that reaches a maximum thickness above the ENE-WSW axis of the Eastern Deeps Deposit. At depth to the west, the conduit is adjacent to the south side of the Western Deeps Intrusion, where the dyke and intrusion contain disseminated magmatic sulfide *** Reid Brook Zone plunges to the east within the dyke, and both the dyke and adjacent paragneiss are *** Ovoid Deposit comprises a bowl-shaped body of massive sulfide where the dyke widens near to the present-day *** is not clear whether this deposit was developed as a widened-zone within the conduit or at the entry point into a chamber that is now lost to erosion. The massive sulfides and breccia sulfides of the Eastern Deeps are petrologically and chemically different when compared to the disseminated sulfides in the VTT; there is a marked break in Ni tenor (Ni content in 100% sulfide, abbreviated to [Ni]100) and Ni/co of sulfide between the *** boundary of the sulfide types is often marked by strong sub-horizontal alignment of heavily digested and metamorphosed paragneiss fragments, developm

关键词： Voisey’s Bay Ni-cu-co sulfide deposit Labrador canada

changes in Air Temperatures and Atmosphere circulation in High Mountainous Parts of Bulgaria for the Period 1941-2008

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Journal of Mountain Science 2012年第2期9卷 185-200页

作者： peter NOJAROV National Institute of Geophysics Geodesy and GeographyBulgarian Academy of Sciences

changes of air temperatures and atmosphere circulation at three high mountainous stations in Bulgaria are investigated for the period of *** three stations are located on peaks Musala,cherni vrah and Botev,where air temperature data have good *** missing data were recovered using the method of differences. A significant mean annual air temperature rise happened in high mountainous parts of Bulgaria- the warming is in the order of 0.7°c for the entire *** increase is very prominent particularly in the last 30 *** contributors to this overall tendency are summer months-June,July and *** some degree,January also could be included in this *** trend shows temperature rise at the beginning of the investigated *** of the causes for such a tendency is atmosphere circulation in respective *** also shows signs of considerable reorganization in both winter and *** is an increase of the cases of warm atmosphere patterns typical for winter, summer and autumn seasons in *** circulation has essential significance for air temperatures during the cold half of the *** January and June atmosphere circulation has a substantial influence on the thermal regime of air in high mountains of *** July,August and November this influence is *** are no cycles in air temperatures for the investigated period.

关键词： Air temperature Trends Atmosphere circulation Bulgaria Mountains

Evolution of the corrosion Product Film and Its Effect on the Erosion–corrosion Behavior of Two commercial 90cu–10Ni Tubes in Seawater

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Acta Metallurgica Sinica(English Letters) 2018年第11期31卷 1148-1170页

作者： Okpo O. Ekerenam Ai-Li Ma Yu-Gui Zheng Si-Yu He peter c. Okafor cAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academyof Sciences Shenyang 110016 China University of chinese Academy of Sciences (UcAS) Beijing 100049 China Department of Pure and Applied chemistry University of Calabar PMB 1115 Calabar CRS Nigeria

The composition and structural evolution of the corrosion product film of two commercial 90cu-10Ni tubes, namely TubeA and Tube B, after being immersed in natural seawater for 1, 3, and 6 months were characterized by scanning electronmicroscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, and its effecton the erosion--corrosion behavior of the tubes was determined through a rotating cylinder electrode system using variouselectrochemical techniques. For the freshly polished samples used as contrast samples, the flow velocity mainly enhancedthe cathodic reaction at low flow velocities while both the anodic and the cathodic reactions were remarkably accelerated athigher flow velocities. The corrosion product films formed on the two commercial 90cu-10Ni tubes after being immersedin seawater for up to 6 months are of a complex three-layer or multilayer structure. The structural evolution of the films isout of sync for the two tubes. A continuous residual substrate layer depleted of Ni was observed in the inner layer of thefilms on Tube B after 30, 90, and 180 days＇ immersion, while it was observed in the film on Tube A only after 180 days＇immersion. The nature of the inner layer plays a crucial role in the erosion-corrosion resistance of the 90cu-10Ni tubes athigher flow velocity. The film with a compact and continuous inner layer of cu20 doped with Ni2＋ and Ni3＋ which bondsfirmly with the substrate could survive and even get repaired with the increased flow velocity. The film on Tube Bpossessing a hollow and discontinuous inner layer composed of the residual substrate was degraded rapidly with increasingrotation speed in spite of its quite good resistance at the stagnant or lower speed conditions.

关键词： copper-nickel alloy Seawater immersion Erosion-corrosion corrosion product film Flow velocity

Phosphorus Use Efficiency of Bio-Based Fertilizers:Bioavailability and Fractionation

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Pedosphere 2016年第3期26卷 310-325页

作者： céline VANEEcKHAUTE Joery JANDA peter A.VANROLLEGHEM Filip M.G.TAcK Erik MEERS Laboratory for Analytical and Applied Ecochemistry Faculty of Bioscience EngineeringGhent University model EAU Département de Génie Civil et de Génie des EauxFaculté des Sciences et de GénieUniversité Laval

Although to date some technologies producing bio-based phosphorus(P) fertilizers have been proposed and implemented, the efficient use of the recovered products is still limited due to legislative constraints and lack of insights in the P release with time and in the corresponding mechanisms. The aim of this work was to evaluate the fertilizer performance in terms of P release and use efficiency of recovered struvite, FePO_4-sludge, digestate, and animal manure as compared to fossil reserve-based mineral triple superphosphate(TSP). First, product physicochemical characteristics and P fractions in the context of European fertilizer legislation were assessed. Next, a controlled greenhouse experiment was set up to evaluate plant reactions as well as changes of P availability in a sandy soil with high P status and a Rheinsand soil with low P status. Soil P fractions were determined in the extracts with water, ammonium lactate and cacl_2, and in soil solution sampled with Rhizon soil moisture samplers. Based on all results, it is worth conducting long-term field trials to evaluate the P release effect of struvite and digestate as compared to animal manure and TSP on different soil types with varying P status. These products showed promise as sustainable substitutes for conventional P fertilizers and could contribute to a more efficient use of P in agriculture. A refined classification of P application standards/recommendations in terms of soil P status, soil texture, and fertilizer characteristics, next to the crop P demand, is recommended. Moreover, the additional use of Rhizon samplers for determination of direct available P, including dissolved organic P, is proposed for better understanding and categorization of different P fertilizers in environmental and fertilizer legislations.

关键词： chemical soil analysis digestate nutrient recovery Rhizon samplers struvite

On a New Genus of Basal Neoceratopsian Dinosaur from the Early cretaceous of Gansu Province, china

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Acta Geologica Sinica(English Edition) 2005年第5期79卷 593-597页

作者： YOU Hailu LI Daqing JI Qiang Matthew c. LAMANNA peter DODSON Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Fossil Research and Development center of the Third Geology and Mineral Resources Exploration Academy of Gansu Province Lanzhou Gansu 730050 China Section of Vertebrate Paleontology Carnegie Museum of Natural History 4400 Forbes Avenue Pittsburgh PA 15213 USA Department of Animal Biology School of Veterinary Medicine University of Pennsylvania 3800 Spruce Street Philadelphia PA 19104 USA

A new genus and species of basal neoceratopsian dinosaur, Auroraceratops rugosus, is reported based on material from the Early cretaceous Xinminpu Group in the Gongpoquan Basin of Gansu Province, china. Auroraceratops is represented by a nearly complete skull and low jaws, and different greatly from all other neoceratopsians by its considerable breadth of the nasals, fungi form expansion of the dorsal end of the lacrimal, highly developed rugosity of the jugal, dentary and surangular, and inflated, striated premaxillary teeth. The finding of Auroraceratops adds diversity and helps elucidate the evolution of basal neoceratopsian dinosaurs.

关键词： Dinosauria Neoceratopsia Early cretaceous Xinminpu Group Gongpoquan Basin Gansu Province