Loading...
*  Steptoean positive carbon isotope excursion - Wikipedia
The Steptoean Positive Carbon Isotope Excursion (SPICE) was a geological event which occurred about 500 million years ago at ...
https://en.wikipedia.org/wiki/Steptoean_positive_carbon_isotope_excursion
*  Dating Corn Domestication Using Carbon Isotopes | HHMI BioInteractive
Carbon Isotopes, Photosynthesis, and Archaeology: Different pathways of photosynthesis cause characteristic changes in carbon ... Carbon isotope ratio data in bone collagen from human skeletons found in Illinois, Ohio, and West Virginia, dated 4,000 B.C. to ... scientists measured carbon isotopes in the collagen tissues of human skeletons from North America. ... isotope ratios that make possible the study of prehistoric human diets. American Scientist 1982; 70(6):596-606. ...
https://www.hhmi.org/biointeractive/dating-corn-domestication-using-carbon-isotopes
*  Optical Carbon Isotope Ratiometer | SBIR.gov
Los Gatos Research is developing a simple robust methodology for the determination of carbon isotope ratios in small gas ... With such a sensitive method of accurately determining carbon isotope levels we hope to significantly advance the prospects for ... The isotope ratio is known to be a sensitive indicator of biologic activity. The new innovative advancement we propose to make ... of 1.5 microns in Phase I and demonstrate that the approach can be used to record the relative isotopic abundance of carbon 12 ...
https://www.sbir.gov/sbirsearch/detail/218156
*  From the eMail Bag: Carbon Isotopes, Part 1: The Basics
Carbon Isotopes in the Carbon Cycle. Since all carbon isotopes are the same chemically they can all interact with other atoms ... of carbon atoms are called Isotopes ("same type"). Chemically, they all act like carbon atoms, they all "look" like carbon ... to use the lighter isotopes of carbon: 12C over 13C over 14C. So if you took a plant and measured what isotopes it has you ... carbon-12 or 12C. But a small number of carbon atoms have an extra neutron, carbon-13, or 13C and an even smaller number of ...
https://www.skepticalscience.com/From-eMail-Bag-Carbon-Isotopes-Part-1.html
*  Distinguishing feral and managed honeybees ( Apis mellifera) using stable carbon isotopes | SpringerLink
We compared carbon isotope ratios from four types of experimental colonies: feral, managed with and without supplemental feed, ... Kelly, J.F. (2000) Stable isotopes of carbon and nitrogen in the study of avian and mammalian trophic ecology. Can. J. Zool. 78 ... Brosi, A.R., Harkins, W.D. (1937) The abundance ratio of the isotopes in natural or isotopically separated carbon. Phys. Rev. ... Overmyer, J.P., MacNeil, M.A., Fisk, A.T. (2008) Fractionation and metabolic turnover of carbon and nitrogen stable isotopes in ...
https://link.springer.com/article/10.1007%2Fs13592-014-0283-4
*  ISOTOPOS DE CARBONO (carbon isotopes): Topics by WorldWideScience.org
The 13C isotopes reflect an organic origin for the carbon. This carbon came from the diagenesis of organic matter caused by an ... Stable carbon and oxygen isotope ratios (δ13C and δ18O) of the epibenthic foraminiferan Elphidium macellum var. aculeatum were ... Using stable isotopes of nitrogen and carbon to study seabird ecology: applications in the Mediterranean seabird community , El ... Using stable isotopes of nitrogen and carbon to study seabird ecology: applications in the Mediterranean seabird community ...
https://worldwidescience.org/topicpages/multi/ES/c/carbon+isotopes.html
*  OSA | Carbon isotopes laser separation by multiple-photon dissociation
Carbon isotopes laser separation by multiple-photon dissociation O. N. Avatcov, A. B. Bakhtadze, V. Yu. Baranov, V. S. Doljikov ... "Carbon isotopes laser separation by multiple-photon dissociation," Appl. Opt. 23, 26-29 (1984) ... Laser isotope separation of rare earth elements N. V. Karlov, B. B. Krynetskii, V. A. Mishin, and A. M. Prokhorov. Appl. Opt. ... Laser Isotope Separation Using Two-Photon Selective Excitation; Its Quantum Efficiency and Separation Factor Yung S. Liu. Appl ...
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-23-1-26
*  Product Details for Carbon Isotope Techniques by David C. Coleman
Buy Carbon Isotope Techniques by David C. Coleman at TextbookX.com. ISBN/UPC: 9780121797317. Save an average of 50% on the ... Description: Carbon Isotope Techniques is a hands-on introduction to using carbon isotope tracers in experimental biology and ... and archaeology will find Carbon Isotope Techniques a valuable resource. Key Features. * Features isotopes in ecological ... The 11C, 12C, 13C, and 14C carbon isotopes are considered and standard techniques are described by established authors. This is ...
https://www.textbookx.com/book/Carbon-Isotope-Techniques/9780121797317/
*  Carbon isotope fractionation by marine phytoplankton - ePIC
Riebesell, U. (1996): Carbon isotope fractionation by marine phytoplankton , Yigal Allon Kinneret Limnological Laboratory, ...
http://epic.awi.de/7962/
*  CARATE - tree-ring carbon isotopes tell stories of past climate evolution | LUOMUS
CARATE - tree-ring carbon isotopes tell stories of past climate evolution. Markku Oinonen, docent, laboratory manager & Laura ... Stability of climate signal in carbon and oxygen isotope records and ring width from Scots pine (Pinus sylvestris L.) in ... a 7500-year record of climate and tree response to climate forcing in Northern Finland on the basis of the carbon isotope ... The stable (non-radioactive) isotopic composition of carbon, δ13C, of the cellulose reflects photosynthetic production and has ...
http://www.luomus.fi/en/carate-tree-ring-carbon-isotopes
*  Locations of marine animals revealed by carbon isotopes - NERC Open Research Archive
Carbon isotope ratios can be used to identify the location of open ocean feeding grounds for any pelagic animals for which ... As the carbon isotope composition of animal tissues varies with sea surface temperature, marine location can be identified by ... 2011 Locations of marine animals revealed by carbon isotopes. Scientific Reports, 1. 21. https://doi.org/10.1038/srep00021 ... matching time series of carbon isotopes measured in tissues to sea surface temperature records. Applying this technique to ...
http://nora.nerc.ac.uk/id/eprint/291761/
*  Carbon isotopes in otolith amino acids identify residency of juvenile snapper (Family: Lutjanidae) in coastal nurseries |...
... to identify residency in juvenile nursery habitats with distinctive carbon isotope values. Conventional bulk... ... Stable carbon isotope analysis of amino-acid enantiomers by conventional isotope ratio mass spectrometry and combined gas- ... Carbon isotopes in otolith amino acids identify residency of juvenile snapper (Family: Lutjanidae) in coastal nurseries. ... Rodelli MR, Gearing JN, Gearing PJ, Marshall N, Sasekumar A (1984) Stable isotope ratio as a tracer of mangrove carbon in ...
https://link.springer.com/article/10.1007%2Fs00338-011-0816-5
*  Stable carbon isotopes reveal soil - stream DIC linkages in contrasting headwater catchments
stable C isotopes, carbon dioxide, dissolved inorganic carbon, methane, soil, stream National Category Environmental Sciences ... Stable carbon isotopes reveal soil - stream DIC linkages in contrasting headwater catchments. Campeau, Audrey Uppsala ... Here we analyze the stable isotope composition of soil and stream carbon dioxide and demonstrate that methane production and ... This physical process is important for the global carbon cycle and has been the focus of multiple studies. However, less is ...
http://uu.diva-portal.org/smash/record.jsf?pid=diva2:1170426
*  Decarboxylation of glycine contributes to carbon isotope fractionation in photosynthetic organisms
... plants indicated that photorespiratory carbon isotope fractionation, opposite in sign when compared to the carbon isotope ... carbon isotope shifts of CO2 relative to the C-1-carboxyl carbon of glycine varied from +14 parts per thousand to -7 parts per ... Carbon isotope effects were investigated for the reaction catalyzed by the glycine decarboxylase complex (GDC; EC 2.1.2.10). ... Decarboxylation of glycine contributes to carbon isotope fractionation in photosynthetic organisms. Igamberdiev, A U ...
http://umu.diva-portal.org/smash/record.jsf?pid=diva2:434113
*  Soil drying effects on the carbon isotope composition of soil respiration | Science Inventory | US EPA
stable isotopes, carbon fluxes, environmental factors, Planning Links:. planid: 4110 myp: ECO ltg: ECO-6 Goal: 4 obj: 405 ... Stable isotopes are used widely as a tool for determining sources of carbon (C) fluxes in ecosystem C studies. Environmental ... Stable isotopes are used widely as a tool for determining sources of carbon (C) fluxes in ecosystem C studies ... Soil drying effects on the carbon isotope composition of soil respiration. Contact. National Health and Environmental Effects ...
https://cfpub.epa.gov/si/si_public_record_report.cfm?Lab=NHEERL&dirEntryId=199926&keyword=Soil+AND+respiration&actType=&TIMSType=+&TIMSSubTypeID=&DEID=&epaNumber=&ntisID=&archiveStatus=Both&ombCat=Any&dateBeginCreated=&dateEndCreated=&dateBeginPublishedPresented=&dateEndPublishedPresented=&dateBeginUpdated=&dateEndUpdated=&dateBeginCompleted=&dateEndCompleted=&personID=&role=Any&journalID=&publisherID=&sortBy=revisionDate&count=50
*  Carbon-12 | isotope | Britannica.com
... carbon: In 1961 the isotope carbon-12 was selected to replace oxygen as the standard relative to which the atomic weights of ... Carbon-14, which is radioactive, is the isotope used in radiocarbon dating and radiolabeling. ... In carbon. In 1961 the isotope carbon-12 was selected to replace oxygen as the standard relative to which the atomic weights of ... Carbon-14, which is radioactive, is the isotope used in radiocarbon dating and radiolabeling. ...
https://www.britannica.com/science/carbon-12
*  Wefer, G (1985): Stable oxygen and carbon isotopes measured on Halimeda incrassata
Die Verteilung stabiler Isotope in Kalkschalen mariner Organismen. Geologisches Jahrbuch, A82, 114 pp, hdl:10013/epic.33623. ... Stable oxygen and carbon isotopes measured on Halimeda incrassata. Institut für Geowissenschaften, Christian-Albrechts- ... Wefer, Gerold (1985): Stable oxygen and carbon isotopes measured on Halimeda incrassata. Institut für Geowissenschaften, ... In supplement to: Wefer, G (1985): Die Verteilung stabiler Isotope in Kalkschalen mariner Organismen. Geologisches Jahrbuch, ...
https://doi.pangaea.de/10.1594/PANGAEA.54090
*  Oxygen and carbon isotope ratios of hydrothermal minerals from Yellowstone drill cores
Oxygen and carbon isotope ratios were measured for hydrothermal minerals (silica, clay and calcite) from fractures and vugs in ... Oxygen and carbon isotope ratios of hydrothermal minerals from Yellowstone drill cores. Series title:. Journal of Volcanology ... Oxygen and carbon isotope ratios were measured for hydrothermal minerals (silica, clay and calcite) from fractures and vugs in ... Oxygen and carbon isotope ratios of hydrothermal minerals from Yellowstone drill cores. Journal of Volcanology and Geothermal ...
https://pubs.er.usgs.gov/publication/70016356
*  CP - Relations - Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise
Siegenthaler, U. and Muennich, K. O.: Carbon-13/carbon-12 fractionation during carbon dioxide transfer from air to sea, {SCORE ... Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise T. Tschumi et al. Related subject area ... Freeman, K. H. and Hayes, J. M.: Fractionation of carbon isotopes by phytoplankton and estimates of ancient {CO}2 levels, ... Leuenberger, M., Siegenthalter, U., and Langway, C.: Carbon Isotope Composition of Atmospheric CO2 during the Last Ice-Age from ...
https://www.clim-past.net/7/771/2011/cp-7-771-2011-relations.html
*  Carbon-isotope analyses of fossil plants as a chemostratigraphic and palaeoenvironmental tool - GRÖCKE - 2007 - Lethaia - Wiley...
Carbon-isotope analyses of fossil plants as a chemostratigraphic and palaeoenvironmental tool. ... GRÖCKE, D. R. (1998), Carbon-isotope analyses of fossil plants as a chemostratigraphic and palaeoenvironmental tool. Lethaia, ...
http://onlinelibrary.wiley.com/doi/10.1111/j.1502-3931.1998.tb00482.x/references
*  CiNii 論文 - Laser microprobe technique for stable carbon isotope of organic carbon in...
Laser microprobe technique for stable carbon isotope of organic carbon in sedimentary rocks * * Liu Yu LIU Yu ... Isotope standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide. CRAIG H. ... Sulfur and carbon isotope analyses of the 2.7 Ga Jeerinab Formation, Fortescue Group, Australia Kakegawa Takeshi , Kasahara ... Organic Carbon isotope composition of Proterozoic sedimentary rocks from India: preliminary results BANERJEE D. M. ...
https://ci.nii.ac.jp/naid/10008805060
*  Isotopes of carbon - Wikipedia
The least stable isotope is 8C, with a half-life of 2.0 x 10−21 s. Carbon-11 or 11C is a radioactive isotope of carbon that ... Stable carbon isotopes in carbon dioxide are utilized differentially by plants during photosynthesis.[citation needed] Grasses ... Carbon (6C) has 15 known isotopes, from 8C to 22C, of which 12C and 13C are stable. The longest-lived radioisotope is 14C, with ... Plants find it easier to use the lighter isotopes (12C) when they convert sunlight and carbon dioxide into food. So, for ...
https://en.wikipedia.org/wiki/Isotopes_of_carbon
*  GMD - Abstract - Compiled records of carbon isotopes in atmospheric CO2 for historical simulations in CMIP6
... for models simulating carbon isotopes in the ocean or terrestrial biosphere. The data may also be useful for other carbon cycle ... Compiled records of carbon isotopes in atmospheric CO2 for historical simulations in CMIP6 Heather Graven1, Colin E. Allison2, ... Modelling of carbon isotopes 13C and 14C in land and ocean components of Earth system models provides opportunities for new ... The use of carbon isotopes in novel evaluation of the ESMs' component ocean and terrestrial biosphere models and in new ...
https://www.geosci-model-dev.net/10/4405/2017/
*  Stable carbon isotopes in tree rings indicate improved water use efficiency and drought responses of a tropical dry forest tree...
... and climate change is important as tropical forests play an important role in carbon and hydrological cycles. We used stable ... The magnitude of carbon discrimination, Δ13C, by plants can be calculated from stable carbon isotopes in tree ring cellulose, δ ... Farquhar GD, Oleary MH, Berry JA (1982) On the relationship between carbon isotope discrimination and the inter-cellular carbon ... We used stable carbon isotopes (δ13C) in tree rings to study the physiological responses of a tropical dry forest tree species ...
https://link.springer.com/article/10.1007/s00468-010-0474-1
*  Stable carbon isotope ratio analyses on trace methane from ice samples - Infoscience
We present an improved micro-extraction gas-chromatography continuous-flow isotope ratio mass spectrometer (CF-IRMS) method to ... Measurement of the concentration and stable isotope ratios of methane from air enclosures in ancient ice can aid in ... Stable carbon isotope ratio analyses on trace methane from ice samples Melton, Joe R. ; Whiticar, Michael J. ; Eby, Paul ... Methane ; Ice ; Method ; Irms ; Carbon isotope ; delta(CH4)-C-13 ; Atmospheric Methane ; Polar Ice ; Mass-Spectrometry ; Record ...
https://infoscience.epfl.ch/record/170878