Search results for "Mount"

showing 10 items of 311 documents

Changes of coagulation parameters during high altitude expedition

2010

Data on changes of haemostatic parameters at altitudes above 5000 m are very limited. So far it is unknown, whether altered coagulation could contribute to the development of acute mountain sickness.Thirty four healthy mountaineers were randomised to two acclimatisation protocols and undertook an expedition on Muztagh Ata (7549 m) in China. Tests were performed at five altitudes up to 6865 m. Haemostatic parameters, such as PT, aPTT, D-Dimer, APC-Resistance (APCR), von Willebrand Factor activity (RCo), ADAMTS-13C-Natriuretic Peptide (CNP) were assessed together with Lake Louise AMS score.D-Dimer significantly increased with increasing altitude (median 0.62 to 0.81 mcg/L, p0.0001). During as…

10018 Ophthalmology ClinicAdultMaleChinabusiness.industryAltitude610 Medicine & health2700 General MedicineGeneral MedicineMiddle AgedEffects of high altitude on humansAtmospheric sciencesMountaineeringOphthalmology clinicAltitudeHumansCoagulation (water treatment)MedicineFemalesense organs10029 Clinic and Policlinic for Internal Medicineskin and connective tissue diseasesbusinessBlood CoagulationSwiss Medical Weekly
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Performance of Kenyan athletes in mountain versus flat marathon running - An example in Switzerland

2013

Harm, C., Knechtle, B., Rust, A.C., Rosemann, T., Lepers, R. & Onywera, V. (2013). Performance of Kenyan athletes in mountain versus flat marathon running - An example in Switzerland. J. Hum. Sport Exerc., 8(4), pp.881-893. The purpose of this study was to compare running performance of Kenyans in a flat city marathon and a mountain marathon in Switzerland. Running times of top three overall Kenyan runners were compared with running times of top three overall runners of other nations in a mountain and a flat marathon held in Switzerland between 2003 and 2011. In the mountain marathon top three male Kenyans achieved with 199±23min the 11th fastest running time behind athletes from Italy (177…

11035 Institute of General PracticeKenyaLong-distance runbiologyAthletesAltitudeMarathon runningPhysical Therapy Sports Therapy and Rehabilitation610 Medicine & healthbiology.organism_classificationEast AfricaRunning timeGeographyHumEast africaEducación Física y Deportiva3612 Physical Therapy Sports Therapy and Rehabilitationlcsh:Sports medicineSocioeconomicsLong-Distance runlcsh:RC1200-1245Mountain
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Colorimetric quantitation of trace amounts of sodium lauryl sulfate in the presence of nucleic acids and proteins

1992

A fast and sensitive procedure for the colorimetric detection of sodium lauryl sulfate (SDS) is presented. The assay is based upon the formation of a chloroform-extractable ion pair between lauryl sulfate and methylene blue that is quantified spectrophotometrically with an estimated detection limit of 150 ng of SDS. The method is suitable for the monitoring of contaminating traces of SDS in protein or nucleic acid samples that have the potential to interfere with enzymatic manipulations such as proteolytic digest, restriction analysis, or reverse transcription. Since the procedure is extremely simple and no special equipment is required it is accessible to every researcher concerned with SD…

1303 BiochemistryTrace AmountsSodiumBiophysicschemistry.chemical_element10050 Institute of Pharmacology and Toxicology610 Medicine & healthBiochemistry1307 Cell Biologychemistry.chemical_compoundNucleic Acids1312 Molecular BiologyAnimalsSulfateColorimetryMolecular BiologyDetection limitChromatographyProteinsSodium Dodecyl SulfateCell BiologyDNAReference StandardsRatsMethylene BluechemistryNucleic acidRNA570 Life sciences; biologyCattleColorimetryQuantitative analysis (chemistry)Methylene blue1304 Biophysics
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Three solutions for a two-point boundary value problem with the prescribed mean curvature equation

2015

The existence of at least three classical solutions for a parametric ordinary Dirichlet problem involving the mean curvature operator are established. In particular, a variational approach is proposed and the main results are obtained simply requiring the sublinearity at zero of the considered nonlinearity.

34B08Applied Mathematics49Q2034B15mean curve operator critical point mountain pass theoremAnalysis
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Thermomineral waters of Greece: geochemical characterization

2020

75 °C). In terms of pH most results vary from 5.5 to 823 °C) ii) warm (23 40 °C) iii) thermal (40 75 °C) and iv) hyperthermal (&gtfew springs show either very low pH (&lt10) proposing serpentinization processes. Regarding TDS concentrations collected waters can be subdivided into low salinity (up to 1.5 g/L) brackish (up to 20 g/L) and saline (up to 43 g/L). The medium high salinities can be justified by mixing with sea water and/or strong waterrock interaction processes. Isotope composition of O and H ranges from 12.7 to +2.7 ‰ SMOW and from 91 to +12 ‰ SMOW respectively and is generally comprised between the Global Meteoric Water Line and the East Mediterranean Meteoric Water Line. Only few water samples show a positive shift for δ18O possibly related to high temperature waterrock interaction processes. Carbon dioxide (18 997000 μmol/mol) or N2 (1100 989000 μmol/mol) or CH4 (&ltMany geothermal areas of Greece are located in regions affected by Miocene or Quaternary volcanism and in continental basins characterised by elevated heat flow. Moreover the majority of them is found along the coast as well as in islands of the Aegean Sea and thus thermal water is often brackish to saline due to marine intrusion into costal aquifer. In the present study almost 300 thermal and cold mineral water samples were collected along the Hellenic territory with their physicochemical parameters (temperature pH electrical conductivity and Eh) and the amount of bicarbonates (titration with 0.1N HCl) being determined in situ. Additionally gases found either in free or dissolved phase were sampled. Both water and gas samples were analysed at the INGVPa laboratories for major ions (Ion Chromatography) silica (Inductively Coupled Plasma Optical Emission Spectrometry) chemical composition of free and dissolved gases (Gas Chromatography) water isotopes (O and H) and carbon and helium isotopes of free and dissolved gases (Mass Spectrometry). The temperature of the investigated waters ranges from 6.5 to 98°C pH from 1.96 to 11.98 whilst Total Dissolved Solids (TDS) from 0.06 to 43 g/L. Based on the temperature parameter waters can be divided into four groups: i) cold (&lt0.5 913000 μmol/mol) are the prevailing gas species found in the studied sites. The δ13CCO2 values ranged from 20.1 to +8.5 ‰ whilst the isotope ratio of He from 0.21 to 6.71 R/RA.4) suggesting interaction with H2Srich gases or very high pH values (&gtSettore GEO/08 - Geochimica E Vulcanologia
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The age-related performance decline in ultraendurance mountain biking

2013

Haupt, Samuel | Knechtle, Beat | Knechtle, Patrizia | Ruest, Christoph Alexander | Rosemann, Thomas | Lepers, Romuald; International audience; ''The age-related changes in ultraendurance performance have been previously examined for running and triathlon but not mountain biking. The aims of this study were (i) to describe the performance trends and (ii) to analyze the age-related performance decline in ultraendurance mountain biking in a 120-km ultraendurance mountain bike race the Swiss Bike Masters from 1995 to 2009 in 9,325 male athletes. The mean (+/- SD) race time decreased from 590 +/- 80 min to 529 +/- 88 min for overall finishers and from 415 +/- 8 min to 359 +/- 16 min for the top …

AdultMale11035 Institute of General PracticeTime FactorsInjury controlAccident preventionPhysical TherapyMountain bikingPoison controlPhysical Therapy Sports Therapy and Rehabilitation610 Medicine & healthSports Therapy and RehabilitationAthletic PerformanceYoung Adult03 medical and health sciencesOFF-ROAD0302 clinical medicine2732 Orthopedics and Sports MedicineAge groupsAge relatedMARATHONHumansMedicineOrthopedics and Sports Medicine''OFF-ROAD3612 Physical Therapy Sports Therapy and RehabilitationAnalysis of VarianceGENDER-DIFFERENCESTRIATHLONTRENDS''business.industry[SCCO.NEUR]Cognitive science/NeuroscienceAge Factors030229 sport sciencesMiddle AgedTRENDSBicycling[ SCCO.NEUR ] Cognitive science/NeurosciencePhysical EnduranceFemalebusiness030217 neurology & neurosurgeryDemographyOff road cycling
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Testing Individual Risk of Acute Mountain Sickness at Greater Altitudes

2009

The assessment of an individual's degree of acclimatization to altitude is difficult. This is particularly applicable to military operations that have to be performed at altitude. This study describes a new and simple test that allows for the determination of an individual's risk for high-altitude illness at higher altitudes. The prediction is based on the lowest oxygen saturation (SaO2) found during an uphill run at high altitude (11,060 ft [3,371 m]), combined with the time needed to complete the run. The test results were compared against the severity of high-altitude symptomatology on the summit of Mont Blanc (15,762 ft [4,808 m]). The main outcome was the significant correlation betwee…

AdultMaleAcclimatizationAltitude SicknessIndividual riskRisk AssessmentStatistics NonparametricRunningOxygen ConsumptionAltitudePredictive Value of TestsGermanySurveys and QuestionnairesTask Performance and AnalysisHumansMedicineOximetryMont blancOxygen saturation (medicine)business.industryAltitudePublic Health Environmental and Occupational HealthGeneral MedicineEffects of high altitude on humansMountaineeringMilitary PersonnelbusinessDemographyMilitary Medicine
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Energy expenditure during an ultraendurance alpine climbing race.

2009

Accurate reports of energy expenditure (EE) during prolonged mountaineering activity are sparse. The purpose of this study was to estimate EE during a winter ultraendurance climbing race and individual mountaineering activities in Mont Blanc, France.Seven days before the race, resting metabolic rate (RMR) and maximal oxygen consumption (Vo2(max)) were measured in 10 experienced male climbers (30.0 +/- 0.9 years). Three days before (reference period) and during the race, heart rate (HR) was recorded for estimation of total daily EE (TDEE), and the type and duration of all activities were collected through questionnaires. Total DEE was calculated by adding DEE during sleep (DEE sleep), sedent…

AdultMaleAnimal scienceOxygen ConsumptionHeart RateSurveys and QuestionnairesHeart rateMedicineHumansMont blancSimulationMountaineeringbusiness.industryPublic Health Environmental and Occupational HealthVO2 maxAnthropometryMountaineeringCold TemperatureEnergy expenditureClimbingBasal metabolic rateEmergency MedicinePhysical EnduranceBasal MetabolismbusinessEnergy MetabolismWildernessenvironmental medicine
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Improvement in altitude performance test after further acclimatization in pre-acclimatized soldiers.

2013

The Altitude Performance Test is a measure designed to assess an individual's degree of acclimatization to reduce the risk of acute mountain sickness during high-altitude activities. The aim of this study was to investigate the hypothesis that test results will improve in pre-acclimatized soldiers after several days of further acclimatization. The Altitude Performance Test consists of an uphill run at high altitude. The event is timed and performed with continuous oxygen saturation (SpO2) monitoring. The individual's time and lowest SpO2 measurement are recorded. This test was performed on the first day of arriving at 11,060 ft, and after 9 days at the same location. The 37 male soldiers we…

AdultMalebusiness.industryAcclimatizationAltitudePublic Health Environmental and Occupational HealthGeneral MedicineEffects of high altitude on humansAltitude SicknessMiddle AgedAcclimatizationAdaptation PhysiologicalTest (assessment)MountaineeringSpO2 measurementYoung AdultAnimal scienceAltitudeMilitary PersonnelMedicineHumansOximetrybusinessOxygen saturation (medicine)Military medicine
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First record of the enigmatic coleoid genus Longibelus from Sakhalin (Far East Russia): a contribution to our understanding of Cretaceous coleoid hab…

2021

AbstractA newly collected specimen of the enigmatic coleoid genus Longibelus is recorded from lower Turonian strata along the River Shadrinka in Sakhalin (Russian Far East). To date, this is the first record of Late Cretaceous coleoid cephalopods from the island and, in fact, from the entire Pacific coast of the Russian Federation. Lithological characteristics, coupled with published geochemical analyses (δ13C and Corg content), suggest the habitat of this coleoid taxon to have been the middle to outer (i.e. distal) shelf. Its provenance from the stratigraphical level that is known as the Scaphites Event, characterised by a mass occurrence of Scaphites and Yesoites, may be indicative of occ…

AmmoniteProvenancebiologyMesopelagic zoneScaphitesFossil man. Human paleontologyGN282-286.7PaleontologyWest-Sakhalin Mountainsbiology.organism_classificationQE701-760Cretaceouslanguage.human_languageLower TuronianPaleontologyGeographyTaxonCephalopodaJapanGenuslanguageFar EastColeoideaSwiss Journal of Palaeontology
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