Search results for "Absorption"

showing 10 items of 2701 documents

Influence of metal–support interaction on the surface structure of gold nanoclusters deposited on native SiOx/Si substrates

2014

The structure of small gold nanoclusters (R ~ 2.5 nm) deposited on different silica on silicon substrates is investigated using several characterization techniques (AFM, XRD, EXAFS and GISAXS). The grain morphology and the surface roughness of the deposited gold clusters are determined by AFM. The in-plane GISAXS intensity is modelled in order to obtain information about the cluster size and the characteristic length scale of the surface roughness. AFM and GISAXS results are in excellent agreement and show that the surface morphology of the deposited clusters depends on whether defect-rich (native) or defect-free (thermal) silica is used as a substrate. Gold clusters show a strong tendency …

Gold clusterMaterials scienceExtended X-ray absorption fine structureGeneral Physics and AstronomyNanoparticleNanotechnologySubstrate (electronics)Thermal treatmentgoldNanoclustersEXAFSsurfaces nanoparticles GISAXS AFMChemical engineeringSurface roughnessGrazing-incidence small-angle scatteringPhysical and Theoretical ChemistryGISAXSmetal-support interactionPhysical Chemistry Chemical Physics
researchProduct

Landfill gas upgrading with countercurrent water wash.

2006

A pilot-scale countercurrent absorption process for upgrading landfill gas to produce vehicle fuel was studied using absorption and desorption units and water as absorbent. The height-to-diameter ratio of the absorption column used was 3:1 instead of the more conventionally used 20:1 ratio, and a higher pressure was used along with a lower water flow rate. The effects of pressure (10-30 bar) and water and gas flow-ratios on the upgrading process were studied. Methane content in the product gas increased to near or above 90% with both gas flows (50 and 100 l/min) used at over 20 bar pressure with 10 l/min water flow and at 30 bar pressure with 5l/min water flow. Carbon dioxide content with t…

Greenhouse EffectAir PollutantsConservation of Natural ResourcesWaste managementWater flowCountercurrent exchangeWater gasExhaust gasWaterPilot ProjectsEquipment DesignMethaneAbsorptionRefuse Disposalchemistry.chemical_compoundLandfill gaschemistryCarbon dioxideGasesWaste Management and DisposalBar (unit)Waste management (New York, N.Y.)
researchProduct

Ergebnisse einer S2k-Konsensuskonferenz der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselerkrankungen (DGVS) gemeinsam m…

2014

GynecologyFood intolerancemedicine.medical_specialtyMalabsorptionCollagenous colitisbusiness.industryGastroenterologymedicinemedicine.diseasebusinessSprueZeitschrift für Gastroenterologie
researchProduct

Experimentelle Untersuchungen über die Resorptionsfähigkeit des Stratum synoviale

1961

Unsere Versuche zeigen, das das Stratum synoviale eine gute Resorptionsfahigkeit besitzt. Eine intraartikular injizierte wasrige Losung wird innerhalb von 20–25 min in die Blutbahn aufgenommen. Durchblutung und Resorption unterliegen den gleichen vegetativ nervosen Regulationen wie in anderen Korpergebieten. Sie konnen durch eine Entzundung an gelenkfernen Gebieten, reflektorisch durch eine Entzundung der Haut uber dem Gelenk, durch ortliche oder intravenose Injektion von Adrenalin, durch eine Barbituratnarkose und Muskelrelaxantien im Sinne einer Verzogerung beeinflust werden. Cortison hat am gesunden Stratum synoviale keinen Einflus auf die Resorption. Jede Entzundung des Stratum synovial…

Gynecologymedicine.medical_specialtyChemistryAbsorption capacitymedicineZeitschrift für Zellforschung und Mikroskopische Anatomie
researchProduct

¿Es real el riesgo de osteoporosis y riesgo de fracturas con el uso crónico de inhibidores de la bomba de protones?

2011

Proton pump inhibitors (PPI) are one of the most widely used groups of drugs and their potential toxicity is periodically reviewed, emphasizing aspects originally considered secondary. The present review analyzes the physiological and pharmacological bases and the scarce clinical evidence for a potential association between the continued administration of PPI and the development of osteoporosis and bone fractures. Both disorders are clearly related to calcium homeostasis and are highly important in elderly patients due to their poor general prognosis and disabling consequences.

Gynecologymedicine.medical_specialtyHepatologybusiness.industryOsteoporosisGastroenterologymedicine.diseaseIntestinal absorptionDisease susceptibilityClinical evidencemedicineMalabsorption syndromesbusinessPotential toxicityGastroenterología y Hepatología
researchProduct

Vitamin A (Retinol) und Retinolbindendes-Protein (RBP) im Serum bei Maldigestion, Malabsorption und Lebercirrhose

1974

Bei Normalpersonen und Patienten mit Malabsorption, Maldigestion und Lebercirrhose wurden vor und nach oraler Belastung mit 600 000 E Vitamin-A-palmitat bzw. wasserloslichem Vitamin A im Serum der Spiegel des Vitamin A (Retinol), des Retinol-bindenden Proteins (RBP) und Praealbumin bestimmt. In der Kontrolle steigt das Retinol nach Belastung signifikant an und erreicht nach 5 Std sein Maximum. Das RBP liegt im Mittel bei 42,25 mg/L, der Praealbuminspiegel bei 400 mg/L. Patienten mit Malabsorption und Lebercirrhose zeigen vor und nach Belastung mit Vitamin-A-palmitat einen gegenuber der Kontrolle verminderten Retinolspiegel. In der Gruppe der Maldigestion ist der Nuchternspiegel des Retinols…

Gynecologymedicine.medical_specialtybusiness.industryCrohn diseaseRetinolVitamin A RetinolGeneral Medicinechemistry.chemical_compoundchemistryDrug DiscoveryMolecular MedicineMedicineMalabsorption syndromesbusinessRetinol bindingGenetics (clinical)Klinische Wochenschrift
researchProduct

Fruktose – Freund oder Feind?

2016

Die Aufnahme von Fruktose ist in vielen industrialisierten Landern weltweit in den letzten Jahrzehnten stark angestiegen. Dies resultiert u. a. aus einer zunehmenden Verwendung des reinen Monosaccharids oder des sog. „High Fructose Corn Syrup“ (HFCS, Maissirup oder auch Fruktose-Glukose-Sirup) als Susungsmittel. Neben Problemen fur Patienten mit einer angeborenen oder erworbenen Fruktosemalabsorption sowie der seltenen, genetisch bedingten hereditaren Fruktoseintoleranz, wird die vermehrte industrielle Verwendung und die damit einhergehende vermehrte Aufnahme von Fruktose uber die Nahrung als ein Risikofaktor in der Entstehung von Ubergewicht und damit assoziierten metabolischen Erkrankunge…

Gynecologymedicine.medical_specialtychemistry.chemical_compoundNutrition and Dieteticschemistrybusiness.industryFructose IntoleranceMedicine (miscellaneous)MedicineFructose malabsorptionFructosebusinessmedicine.diseaseAktuelle Ernährungsmedizin
researchProduct

Dosimetric perturbations of a lead shield for surface and interstitial high-dose-rate brachytherapy.

2014

In surface and interstitial high-dose-rate brachytherapy with either (60)Co, (192)Ir, or (169)Yb sources, some radiosensitive organs near the surface may be exposed to high absorbed doses. This may be reduced by covering the implants with a lead shield on the body surface, which results in dosimetric perturbations. Monte Carlo simulations in Geant4 were performed for the three radionuclides placed at a single dwell position. Four different shield thicknesses (0, 3, 6, and 10 mm) and three different source depths (0, 5, and 10 mm) in water were considered, with the lead shield placed at the phantom surface. Backscatter dose enhancement and transmission data were obtained for the lead shields…

HDR brachytherapyMaterials sciencesuperficial and interstitialmedicine.medical_treatmentBrachytherapyBrachytherapydosimetric perturbationModels BiologicalSensitivity and SpecificityImaging phantomLead shieldingOpticsRadiation ProtectionShieldBody surfacemedicineHumansScattering RadiationComputer SimulationRadiometryWaste Management and DisposalMonte Carlo simulationbusiness.industrytransmissionPublic Health Environmental and Occupational HealthAbsorption RadiationReproducibility of ResultsRadiotherapy DosageGeneral MedicineEquipment DesignHigh-Dose Rate BrachytherapyEquipment Failure AnalysisLeadElectromagnetic shieldinglead shieldbusinessNuclear medicineBolus (radiation therapy)Journal of radiological protection : official journal of the Society for Radiological Protection
researchProduct

Viršu (Calluna vulgaris) ķīmiskā sastāva izvērtējums dažādās augšanas vietās

2017

Viršu (Calluna vulgaris) ķīmiskā sastāva izvērtējums dažādās augšanas vietās. Pērkone B., zinātniskā vadītāja Mag. chem. lektore Balcerbule Z. Bakalaura darbs, 30 lappuses, 9 attēli, 8 tabulas, 22 literatūras avoti, 5 pielikumi. Latviešu valodā. Darbā noteikts viršu ķīmiskais sastāvs un to augsnes pH vērtības dažādās Latvijas vietās. Paraugi ievākti no meža un purva Smiltenes novada Variņu un Launkalnes pagastu robežteritorijā, un Garkalnes novadā esošā lielceļa A2 (Rīga-Sigulda) ceļmalā. Augu daļām – ziediem, lapām, stumbriem, saknēm – noteikts pelnu saturs. Vara, cinka un mangāna saturs viršu ziedos, stumbros saknēs un arī augsnē noteikts ar liesmas atomabsorbciometru. Dzelzs saturs notei…

HEATHERVIRŠIFLAME ATOMIC ABSORPTIONLIESMAS ATOMABSORBCIOMETRIJAĶīmija
researchProduct

ORIGIN: metal creation and evolution from the cosmic dawn

2012

Herder, Jan-Willem den et al.

HOT INTERGALACTIC MEDIUMUNIVERSEChemical evolutionMission7. Clean energy01 natural sciencesSpectral lineSettore FIS/05 - Astronomia E Astrofisica010303 astronomy & astrophysicsmedia_commonPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)NUCLEOSYNTHESISCOSMIC cancer databaseClusters of galaxiesSatellite MissionEpoch (reference date)Astrophysics::Instrumentation and Methods for AstrophysicsFORESTGALAXIESGamma-ray burstsAstrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaX-ray Mission Gamma-ray bursts Clusters of galaxies Warm-hot intergalactic medium Chemical evolutionWarm-hot intergalactic mediumAstrophysics - Cosmology and Nongalactic AstrophysicsAstrophysics and AstronomyStructure formationCosmology and Nongalactic Astrophysics (astro-ph.CO)Clusters of galaxiemedia_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaREDSHIFTFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsX-ray Mission Gamma-ray bursts Clusters of galaxies Warm-hot intergalactic medium Chemical evolutionABSORPTION-SPECTRA010309 opticsX-rayYIELDS0103 physical sciencesGamma-ray burstInstrumentation and Methods for Astrophysics (astro-ph.IM)X-ray; Mission; Gamma-ray bursts; Clusters of galaxies; Warm-hot intergalactic medium; Chemical evolutionAstronomyAstronomy and AstrophysicsRedshiftGalaxyUniverse13. Climate actionChemical evolution; Clusters of galaxies; Gamma-ray bursts; Mission; Warm-hot intergalactic medium; X-ray; Astronomy and Astrophysics; Space and Planetary ScienceSpace and Planetary ScienceGamma-ray burstCLUSTERSExperimental Astronomy
researchProduct