Search results for "O-18"

showing 10 items of 11 documents

CCDC 127933: Experimental Crystal Structure Determination

2001

Related Article: S.Kiviniemi, M.Nissinen, M.T.Lamsa, J.Jalonen, K.Rissanen, J.Pursiainen|2000|New J.Chem.|24|47|doi:10.1039/a907608e

Dibenzo-18-crown-6 124-triazolium clathrate perchlorateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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A standard calculation methodology for human doubly labeled water studies.

2021

Summary The doubly labeled water (DLW) method measures total energy expenditure (TEE) in free-living subjects. Several equations are used to convert isotopic data into TEE. Using the International Atomic Energy Agency (IAEA) DLW database (5,756 measurements of adults and children), we show considerable variability is introduced by different equations. The estimated rCO2 is sensitive to the dilution space ratio (DSR) of the two isotopes. Based on performance in validation studies, we propose a new equation based on a new estimate of the mean DSR. The DSR is lower at low body masses (<10 kg). Using data for 1,021 babies and infants, we show that the DSR varies non-linearly with body mass betw…

IndirectFuture studiesBODY-WATER030309 nutrition & dietetics[SDV]Life Sciences [q-bio]Body waterINFANTS030209 endocrinology & metabolismDoubly labeled watertotal energy expenditureCarbon dioxide productionCalorimetryOxygen IsotopesCalorimetryArticleGeneral Biochemistry Genetics and Molecular BiologyRC120003 medical and health sciences0302 clinical medicineTotal energy expendituredoubly labeled water; free-living; total energy expenditure; validationStatisticsINDIRECT CALORIMETRYRange (statistics)O-18HumansObesity(H2O)-H-2-O-18 METHODCARBON-DIOXIDE PRODUCTIONComputingMilieux_MISCELLANEOUSMathematicsCO2 PRODUCTIONH-2validation0303 health sciencesfree-livingDILUTION SPACE RATIOENERGY-EXPENDITUREWaterCalorimetry IndirectDeuterium6. Clean waterdoubly labeled waterDilutionIAEA DLW database groupBody Composition1182 Biochemistry cell and molecular biologyEnergy Metabolism
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Isotopic composition of the precipitations in the central Mediterranean: Origin marks and orographic precipitation effects

2006

The isotopic composition of the rainfall in northwestern Sicily (Italy, central Mediterranean) was investigated in the period February 2002 to March 2003. A rain gauge network was installed and sampled monthly. The monthly values of the D and 18O ratios showed a wide range that reflected seasonal climatic variations. Mean weighted values were used to define an isotopic model of precipitation. Temporal variations in deuterium excess were also investigated. Using mean volume weighted values, the Local Meteoric Water Line (LMWL) can be represented by the equation: δD = 4.7δ18O - 8.2 (r2 = 0.96). Deuterium excess (d = δD - 8δ18O) was found to be strongly related to orography. The coastline samp…

Mediterranean climateAtmospheric ScienceGROUNDWATERDEUTERIUMSoil ScienceAquatic ScienceOceanographyAtmospheric sciencesFOGHYDROLOGYGeochemistry and PetrologySTABLE-ISOTOPESEarth and Planetary Sciences (miscellaneous)WATERO-18PrecipitationEarth-Surface ProcessesWater Science and TechnologyOrographic liftHydrologyEcologyRain gaugeFRACTIONATIONPaleontologyForestryOrographySEA AREAEVAPORATIONGeophysicsDeuteriumSpace and Planetary ScienceMeteoric waterKinetic fractionationEnvironmental science
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Clima subártico para os primeiros Homo sapiens na Europa

2021

Description

Mineralização do esmalte do denteSupplementary dataMultidisciplinaryEcologyFosfato ósseoSciAdv r-articlesTemperaturaSubarctic climateSocial and Interdisciplinary SciencesIsótopos de oxigênioDelta-O-18GeochemistryGeographyHuman evolutionComposição isotópica estávelHomo sapiensAnthropologyCavalosSérie-timeIngestão de águaÓsseo mamíferoResearch ArticleScience Advances
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CCDC 127935: Experimental Crystal Structure Determination

2001

Related Article: S.Kiviniemi, M.Nissinen, M.T.Lamsa, J.Jalonen, K.Rissanen, J.Pursiainen|2000|New J.Chem.|24|47|doi:10.1039/a907608e

Space GroupCrystallographyBenzo-18-crown-6 imidazolium clathrate perchlorateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 234814: Experimental Crystal Structure Determination

2005

Related Article: A.M.Costero, M.J.Banuls, M.J.Aurell, M.D.Ward, S.Argent|2004|Tetrahedron|60|9471|doi:10.1016/j.tet.2004.07.088

Space GroupCrystallographyCrystal SystemCrystal Structure27-Dinitro-1112151625262829-octahydro-1822-(azeno)dibenzo[wy][141821715]tetraoxadiazacycloheptacosine-9172331(14H24H)-tetraone monohydrateCell ParametersExperimental 3D Coordinates
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CCDC 122143: Experimental Crystal Structure Determination

1999

Related Article: S.Kiviniemi, A.Sillanpaa, M.Nissinen, K.Rissanen, M.T.Lamsa, J.Pursiainen|1999|Chem.Commun.||897|doi:10.1039/a902014d

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersDibenzo-18-crown-6 pyrazolium clathrate perchlorateExperimental 3D Coordinates
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CCDC 127934: Experimental Crystal Structure Determination

2001

Related Article: S.Kiviniemi, M.Nissinen, M.T.Lamsa, J.Jalonen, K.Rissanen, J.Pursiainen|2000|New J.Chem.|24|47|doi:10.1039/a907608e

Space GroupCrystallographyCrystal SystemCrystal StructureDibenzo-18-crown-6 thiazolium clathrate perchlorateCell ParametersExperimental 3D Coordinates
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CCDC 122142: Experimental Crystal Structure Determination

1999

Related Article: S.Kiviniemi, A.Sillanpaa, M.Nissinen, K.Rissanen, M.T.Lamsa, J.Pursiainen|1999|Chem.Commun.||897|doi:10.1039/a902014d

Space GroupCrystallographyCrystal SystemDibenzo-18-crown-6 imidazolium clathrate perchlorateCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1469019: Experimental Crystal Structure Determination

2016

Related Article: Filip Topić and Kari Rissanen|2016|J.Am.Chem.Soc.|138|6610|doi:10.1021/jacs.6b02854

Space GroupCrystallographyCrystal Systembenzo-18-crown-6 thiourea 12345-pentafluoro-6-iodobenzeneCrystal StructureCell ParametersExperimental 3D Coordinates
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