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Carbon IsotopesCarbonIsotopesIsotope LabelingOxygen IsotopesNitrogen IsotopesCarbon DioxideCalcium SignalingMethyl ChlorideAtmosphereFossilsGeologic SedimentsChemical FractionationCalcium ChannelsEthylene DichloridesPaleontologyXanthobacterVolcanic EruptionsPinus taedaCalcium, DietaryMethanePhotosynthesisPeptococcaceaeCarbon MonoxideCarbonatesPlant LeavesCarbon CycleNanotubes, CarbonCarbon Compounds, InorganicEpitestosteronePlant TranspirationFlaveriaRhamnusEcosystemBiomassHistory, AncientMyrtusHyphomicrobiumCalcium CarbonateDoping in SportsSeawaterBiodegradation, EnvironmentalWaterNitrogenOceans and SeasZinc IsotopesGas Chromatography-Mass SpectrometryPlant StomataSoilPhosphoenolpyruvate CarboxylaseRainSulfur IsotopesCalcium PhosphatesCalcium IsotopesExtinction, BiologicalFresh WaterRibulose-Bisphosphate CarboxylaseDeuteriumCarbon Monoxide PoisoningCalcium ChlorideTimePoaceaeTreesIron IsotopesAcetatesChiropteraClimateCalcium Channels, L-TypeCalcium OxalatePlantsKineticsStrontium IsotopesSulfatesCalcium RadioisotopesCalcium GluconateGeographyCarbon TetrachlorideBacteriaModels, BiologicalDietAnaerobiosisCarbon SequestrationRadioisotope Dilution TechniqueCalcium CompoundsCarbon DisulfideSeasonsCalcium Channels, N-TypeCarbon RadioisotopesEgtazic AcidMass SpectrometryBiological EvolutionCalcium Channel AgonistsPhylogenyHydrogen-Ion ConcentrationTime FactorsPhosphorusCarbon Tetrachloride PoisoningIndicator Dilution TechniquesCalcium HydroxideMolecular Sequence Data
CarbonateStrontiumCompositionRatiosNaturally occuringDioxideMagnesiumEARTH AND PLANETARY SCIENCE LETTERSStable isotopeShellsNitrogenPotassiumBenthicAnalysesGeochemistryProtiumAtomsBoronProtonsRadioisotopesDecayElement'sAtomSeawaterEarth'sTemperatureAbundanceElectronsSulfateNeutronsReconstructionSedimentSilicateChemistryTraceVariationsMassNuclearCesiumRatsBoneElementsChemicalEmissionsNaturalRevealsShiftsCycleImplications
Carbonate31
Strontium3
  • Samples were analyzed to determine the ratio of strontium to calcium, along with levels of the isotopes carbon-13 and oxygen-18. (bibliotecapleyades.net)
  • We investigated the influences of temperature, salinity and pH on the calcium isotope as well as trace and minor element (uranium, strontium, magnesium) to Ca ratios on calcium. (eudat.eu)
  • and F.D. "Bud" Holland Jr., professor emeritus, department of geology and geological engineering, University of North Dakota, Grand Forks, ND, co-authored the paper, which compared the carbon, oxygen and strontium isotope ratios of four fossils collected from the Fox Hills Formation of South Dakota. (erudera.com)
Composition11
  • Table 2) Calcium concentrations and isotopic composition in pore fluids from. (eudat.eu)
  • Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. (eudat.eu)
  • Table 4) Calcium and carbon isotope composition of South Ferriby, Lincolnshi. (eudat.eu)
  • Table 1) Calcium isotope composition, Mg/Ca, Sr/Ca and U/Ca ratios of calcar. (eudat.eu)
  • The isotopic composition of carbon changes with shifts in the carbon cycle, such as the movement of greenhouse gases like methane and carbon dioxide in the atmosphere. (barbrastreisand.com)
  • 2018). Calibration of Na/Ca partitioning in the benthic foraminifer Operculina ammonoides under variable seawater calcium: toward reconstructing Cenozoic seawater composition. (rutgers.edu)
  • The atmospheric carbon dioxide (CO 2 ) mixing ratio and its carbon isotope ( δ 13 C-CO 2 ) composition contain important CO 2 sink and source information spanning from ecosystem to global scales. (copernicus.org)
  • SHORT DESCRIPTION The aim of this PhD project is to study elemental and isotopic composition (with a focus on oxygen, carbon and magnesium) in modern brachiopod shells from various natural and laboratory controlled habitats, and using them for proxy calibration. (baseline-earth.eu)
  • In this study, we show that the nitrogen isotope composition of organic matter preserved in mammalian tooth enamel (δ 15 N enamel ) records diet and trophic position. (blueskytccaalibaba.com)
  • Other ancient mats have been studied, but Westall says evidence that they photosynthesized has been indirect - either being assumed from their carbon-isotope composition, which Westall argues can also come from non-photosynthetic microbes, or by looking closely at the mat's structure and seeing microbe-like structures. (uncommondescent.com)
  • After extracting the otoliths and polishing them off of dirt and debris, they look at carbon, oxygen and other atoms in the otolith layers and analyse the composition of stable isotopes - a version of an atom - in the otoliths, using sophisticated tools and techniques. (scroll.in)
Ratios3
  • Table 1) Calcium concentrations and isotope ratios of pore fluids of ODP Sit. (eudat.eu)
  • We will use brachiopod shells as archive and determine trace element ratios, stable (δ 18 O and δ 13 C) as well as traditional and non-tradition isotope systems (δ 11 B, δ 26 Mg, δ 44/40 Ca, clumped isotopes Δ 47 ) in order to gain marine environmental proxy information. (baseline-earth.eu)
  • While traditional stable isotope analyses of tooth enamel (e.g., carbon and oxygen) and trace element ratios (e.g. (blueskytccaalibaba.com)
Naturally occuring3
  • This table shows information about naturally occuring isotopes , their atomic masses , their natural abundances , their nuclear spins , and their magnetic moments . (webelements.com)
  • Further data for naturally occuring isotopes of carbon are listed above. (webelements.com)
  • Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. (ovh.net)
Dioxide15
  • The marine calcium cycle is affected by changing atmospheric carbon dioxide due to ocean acidification. (wikipedia.org)
  • Ocean acidity due to carbon dioxide has already increased by 25% since the industrial revolution. (wikipedia.org)
  • As carbon dioxide emissions continually increase and accumulate, this will negatively affect the lives of many marine ecosystems. (wikipedia.org)
  • A new paper in Science examines the geologic record for context relating to ocean acidification, a lowering of the pH driven by the increased concentration of carbon dioxide in the atmosphere. (barbrastreisand.com)
  • In one project we are transferring carbon dioxide from an abundant supply of deep-ocean water to a portion of the reef in order to simulate a reef of the future. (washington.edu)
  • We cannot see or taste carbon dioxide, one of the two main products of that combustion, the other being water vapour. (skepticalscience.com)
  • Once up there, one key difference between carbon dioxide and water vapour becomes critically important. (skepticalscience.com)
  • Carbon dioxide has no liquid state at the pressures encountered in Earth's atmosphere. (skepticalscience.com)
  • Instead, at normal atmospheric pressures, it sublimes from solid to gas at −78 °C. Solid carbon dioxide is also known as dry ice, but cannot form in the range of temperatures found within Earth's atmosphere, although it is produced industrially for various purposes. (skepticalscience.com)
  • So as opposed to water vapour, carbon dioxide is an example of a non-condensing gas: once up there it stays up there for a long time. (skepticalscience.com)
  • If you needed a smoking gun in order to accept the above, there is one: carbon dioxide derived from fossil fuel burning has a very distinct chemical fingerprint that is readily measurable in air samples. (skepticalscience.com)
  • This was additionally done at a range of atmospheric carbon dioxide concentrations to simulate the effects of ocean acidification. (timescavengers.blog)
  • Sarkar and his team devised a technique for more precision analysis of otoliths - one can examine a few millimetre-sized otoliths by a carbon dioxide laser at a few micron scale intervals to pinpoint their oxygen isotopic compositions. (scroll.in)
  • Silicon dioxide react with calcium oxide SiO 2 + CaO CaSiO 3 [ Check the balance ] Silicon dioxide react with calcium oxide to produce calcium silicate. (kvdk.net)
  • Detailed knowledge about how climate and human activities influence the sources and sinks of greenhouse gases like carbon dioxide and methane is needed in order to make the informed and effective decisions needed for combating climate change. (lu.se)
Magnesium3
  • Calcium ions (Ca2+) and magnesium ions (Mg2+) have the same charge (+2) and similar sizes, so they react similarly and are able to substitute for each other in some minerals, such as carbonates. (wikipedia.org)
  • A number of different techniques were then used to constrain past temperature changes, including measuring the ratio of magnesium and calcium, and the arrangement of isotopes of carbon and oxygen within the calcite shells of the foraminifera, both of which vary according to the temperature of the water in which the foraminifera grew. (geologyin.com)
  • The tools Prof. Higgins has employed to study these include numerical models of chemical and isotopic biogeochemical cycles, as well as analysis of traditional stable isotopes of oxygen and carbon, and new isotope systems such as magnesium, calcium, and potassium. (princeton.edu)
EARTH AND PLANETARY SCIENCE LETTERS2
  • Constraining the cause of the end-Guadalupian extinction with coupled records of carbon and calcium isotopes[J]. Earth and Planetary Science Letters,2014,396:201-212. (gig.ac.cn)
  • Their research, recently published in Earth and Planetary Science Letters, combined sediment analysis with geochemical data in the form of carbon and oxygen isotopes. (sciencefinest.com)
Stable isotope2
  • Carpenter, research scientist in the UI Center for Global and Regional Environmental Research and associate director of the Paul H. Nelson Stable Isotope Laboratory, says that the work provides another piece of the paleo-climate puzzle for the time period just prior to the end of the Cretaceous. (erudera.com)
  • The lightest stable isotope of germanium is 70Ge, and thus 62Ge is far from stability. (lu.se)
Shells5
  • Isotopes of boron present in marine shells track ocean water pH. (barbrastreisand.com)
  • SHORT DESCRIPTION This PhD project generates a Phanerozoic marine Mg isotope record, based on the analysis of δ 26 Mg values in calcitic shells of modern and fossil brachiopods. (baseline-earth.eu)
  • Elements exist in different variations - isotopes - and it is the proportion of oxygen isotopes in the foram shells that, for example, reveals changes in global temperature and in global ice volume. (lu.se)
  • The proportion of carbon isotopes in the shells tells us about changes in ocean circulation, but also of local changes in upwelling areas. (lu.se)
  • The proportion of oxygen isotopes in the shells reveals changes in global temperature and in global ice volume. (lu.se)
Nitrogen4
  • The variation of organic carbon with plantation age was more stable compared to total nitrogen and phosphorus of leaf litter. (biomedcentral.com)
  • The nutrient elements carbon and nitrogen in the leaf litter and their interrelationship also have a great impact on soil microorganisms, because carbon is not only the element that provides energy, but also the element with the largest content in the microbiota. (biomedcentral.com)
  • In contrast, the nitrogen (N) isotope ratio of organic material (expressed as δ 15 N vs. AIR in ‰, where δ 15 N = [( 15 N/ 14 N sample / 15 N/ 14 N reference ) − 1] × 1000) derived from bulk tissues or specific compounds (e.g., amino acids) is a widely used proxy for the dietary and trophic behavior of animals in terrestrial and marine food webs. (blueskytccaalibaba.com)
  • Despite the potential of nitrogen isotopes for trophic reconstruction, their application in the paleontological record has been limited due to the poor preservation of N-containing organic matter. (blueskytccaalibaba.com)
Potassium6
  • They include potassium-argon dating, 000 years ago, 000 years back, radioactive carbon dating reliable only goes back. (byaonline.org)
  • Potassium Isotopes" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
  • K-41 is a stable potassium isotope. (umassmed.edu)
  • This graph shows the total number of publications written about "Potassium Isotopes" by people in this website by year, and whether "Potassium Isotopes" was a major or minor topic of these publications. (umassmed.edu)
  • Below are the most recent publications written about "Potassium Isotopes" by people in Profiles. (umassmed.edu)
  • Pollucite is directly reduced by heating the ore in the presence of calcium to 950 °C in vacuum, or in the presence of either sodium or potassium to 750 °C in an inert atmosphere (Burt 1993). (cdc.gov)
Benthic1
  • Furthermore, we provide multiple deep-water Ω reconstructions paired with benthic foraminiferal carbon isotopes during the PETM. (lu.se)
Analyses2
  • Chanton was using isotope analyses to track the Deepwater Horizon oil spill and its potential impacts on the marine food web. (gulfresearchinitiative.org)
  • This will be achieved through a combination of methods involving field collections, systematics, SEM ultrastructural analyses and geochemical trace-isotope analyses. (baseline-earth.eu)
Geochemistry2
  • Working in the UNC isotope geochemistry lab, Kelsey wrote a research paper about using carbon isotope evidence from deer teeth to identify where the animals lived. (gulfresearchinitiative.org)
  • To answer these questions, we work on the pristine atoll of Tetiaroa in French Polynesia using chemical oceanography, isotope geochemistry, modeling, and a lot of plumbing. (washington.edu)
Protium1
  • So this symbol represents the protium isotope. (ovh.net)
Atoms4
  • The stable isotopes are atoms of the same element that have extra neutrons but need not give off energy or particles to remain in balance. (examplespedia.com)
  • Please indicate the age is absorbed teenager dating advice carbon-14 atoms to. (byaonline.org)
  • Most of the heavier atoms have a range of isotopes, and the quoted atomic mass on the Table is the weighted average of the isotopic masses. (ovh.net)
  • For example, the mass number of argon atoms and calcium atoms can both be 40. (ovh.net)
Boron1
  • In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. (periodic-table.org)
Protons6
  • In isotopes, these give the atom a greater atomic mass (A), a property that is calculated with protons and neutrons. (examplespedia.com)
  • Carbon-14 is a consequence of seven protons, and radioactive dating only good for. (byaonline.org)
  • Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. (periodic-table.org)
  • Carbon-12 has a mass of 12.011, an atomic number of 6 and a symbol of C. For example, the most common isotope of carbon has 6 protons and 6 neutrons. (ovh.net)
  • It can be observed from the chart that there are more neutrons than protons in nuclides with Z greater than about 20 (Calcium). (nuclear-power.com)
  • It is needed to find the ratio of neutrons to protons to identify the stability of an isotope. (nuclear-power.com)
Radioisotopes1
Decay5
  • This table gives information about some radiosotopes of carbon, their masses , their half-lives , their modes of decay , their nuclear spins , and their nuclear magnetic moments . (webelements.com)
  • C-14, carbon-13 and its position compared to decay that has transformed our understanding of a method compares the atmosphere is used reference standard year. (byaonline.org)
  • C-14 to senior dating blogs the decay of radio- carbon from volcanoes are two different. (byaonline.org)
  • Select an isotope to calculate its radio activity decay. (easycalculation.com)
  • Unstable isotopes decay through various radioactive decay pathways, most commonly alpha decay, beta decay, or electron capture. (nuclear-power.com)
Element's1
Atom3
  • The C-12 atom has been given the atomic weight of exactly 12.000000000 and is used as the basis upon which the atomic weight of other isotopes is determined. (webelements.com)
  • Carbon 14 only occurs in tiny traces - about one atom per gram of carbon is a ballpark figure. (skepticalscience.com)
  • relative atomic mass (symbol: A r, also called atomic weight), which is the ratio of the average mass per atom of an element from a given sample to 1/12 the mass of a carbon-12 atom. (ovh.net)
Seawater1
  • Rivers containing more dissolved Ca2+ are generally considered more alkaline.Calcium is one of the most common elements found in seawater. (wikipedia.org)
Earth's2
Temperature3
  • Global temperature increased about 6°C over 20,000 years due to an abrupt release of carbon to the atmosphere (though this was not as abrupt as current emissions). (barbrastreisand.com)
  • The isotopes of oxygen in these otoliths depend on the temperature of the water in which the fish grew and record continuous snapshots of past temperatures during the lifetime of the fish for years, said lead investigator Anindya Sarkar at Indian Institutes of Technology, Kharagpur's Department of Geology and Geophysics. (scroll.in)
  • Taken together, the temperature and carbon data points give you a piece of very comprehensive climate information at any given time over the time the fish had been living," Sarkar told Mongabay-India . (scroll.in)
Abundance1
  • We are also able to measure the abundance of carbon-13 and oxygen-18 isotopes in the samples, which can also be used as proxies. (timescavengers.blog)
Electrons1
  • The radioactive isotopes are altered over time, emitting radiation in the form of alpha rays (helium nuclei), beta rays (electrons or positrons energy and speed) or gamma (high frequency energy of the electromagnetic spectrum). (examplespedia.com)
Sulfate1
  • Assay precision is improved by incorporating carbon-13 labeled internal standards for each of the analytes, as well as a 4-methylumbelliferyl glucuronide, 4-methylumbelliferyl sulfate, and carbon-13 labeled 4-methylumbelliferone to monitor deconjugation efficiency. (cdc.gov)
Neutrons1
Reconstruction1
Sediment1
Silicate1
  • If so, during this period, carbon removal from the ocean via calcite burial on the seafloor in response to enhanced silicate weathering may be weakened, suggesting that more carbon was sequestered via other processes such as those related to organic carbon burial. (lu.se)
Chemistry1
  • The ECS Lecture at the Plenary Session of the 239th ECS Meeting with IMCS18 will be delivered by Dr. Rodney Ruoff, Distinguished Professor in the Departments of Chemistry and Materials Science, and the School of Energy Science and Chemical Engineering at the Ulsan National Institute of Science and Technology (UNIST), South Korea, and Director of the Center for Multidimensional Carbon Materials (CMCM). (electrochem.org)
Trace1
Variations1
  • Despite the importance of wood density for carbon sequestration and tree hydraulics, little is known about the factors controlling variations in wood density across the tree ring, i.e. micro-density, at the intra-annual scale. (copernicus.org)
Mass5
  • Using a mass spectrometer at FSU, she calculates the stable carbon isotopes and then sends them to the University of Georgia to analyze their radiocarbon levels. (gulfresearchinitiative.org)
  • The half - life is the parameter indicating the time it takes to disintegrate half of the mass of a radioactive isotope. (examplespedia.com)
  • Molar mass of CaSiO3 = 116.1617 g/mol This compound is also known as Calcium Metasilicate. (kvdk.net)
  • The mass number is different for each different isotope of a chemical element. (ovh.net)
  • Mass number only gives an estimate of isotope mass in atomic mass units (amu).The isotopic mass of carbon-12 is correct because the atomic mass unit is defined as 1/12 of the mass of this isotope.For other isotopes, mass is within about 0.1 amu of the mass number. (ovh.net)
Nuclear2
  • Some isotopes are used to produce nuclear energy. (examplespedia.com)
  • Radioactive isotopes of cesium such as 134Cs and 137Cs are produced by nuclear fission in fuel rods in nuclear power plants and in fallout from nuclear weapons. (cdc.gov)
Cesium1
  • Cesium alum is crystallized from the leach filtrate by stage cooling to 50 °C and then to 20 °C and roasted in the presence of 4% carbon. (cdc.gov)
Rats1
Bone2
  • The three most significant mechanisms controlling calcium use within the body are intestinal absorption, renal absorption and bone turnover, which is controlled predominantly by hormones and their corresponding receptors in the gut, kidneys and bones respectively. (wikipedia.org)
  • This allows for calcium use throughout the body, namely in bone growth, cellular signalling, blood clotting, muscle contraction and neuron function. (wikipedia.org)
Elements1
Chemical3
Emissions2
  • While society needs to approach or surpass net zero carbon emissions by 2050 if the planet as we know it is to survive, most of the low carbon technologies that we promote (such as electric vehicles) cannot achieve net zero when considered over their whole life cycle. (electrochem.org)
  • If you wanted to find a smoking gun with respect to human carbon emissions and their role in global warming, where would you look? (skepticalscience.com)
Natural2
Reveals1
  • Measuring the age of the absolute dating is called radioactive isotope of origin based upon two isotopes reveals the current instance. (byaonline.org)
Shifts1
Cycle9
  • The calcium cycle is a transfer of calcium between dissolved and solid phases. (wikipedia.org)
  • The calcium cycle is a common thread between terrestrial, marine, geological, and biological processes. (wikipedia.org)
  • These findings show that the combination of long-term atmospheric carbon isotope observations and inverse modeling can provide a powerful constraint on the carbon cycle of these complex megacities. (copernicus.org)
  • Not only did biomineralization give rise to the diverse array of body plans we see today, but it also had a profound impact on the planet's carbon cycle. (sciencefinest.com)
  • Professor John Higgins' primary research interest is the evolution of the carbon cycle and the global climate system over Earth history. (princeton.edu)
  • LUCCI was a research centre at Lund University devoted to studies of the carbon cycle and how it interacts with the climate system. (lu.se)
  • Working together in a creative cross-disciplinary environment, our goals are to increase the understanding of how the carbon cycle and climate system function and interact, and to disseminate our findings to society. (lu.se)
  • Although progress has been made in our understanding of the carbon cycle and climate there are several fundamental science questions that remain unanswered and that are pivotal for an increased understanding of the Earth System as well as for our ability to predict future changes through modeling. (lu.se)
  • How do possible increased extreme events such as devastating storms and flooding affect carbon cycle processes and do we already see such perturbations? (lu.se)
Implications1
  • Upregulation of phytoplankton carbon concentrating mechanisms during low C02 glacial periods and implications for the phytoplankton pCO2 proxy. (rutgers.edu)