carbon 14


  • WordNet 3.6
    • n carbon 14 a radioactive isotope of carbon
    • ***


In literature:

He has three retorts, 14 by 16 inches, and 8 feet long, in an oven carbonizing 2 cwt.
"Scientific American Supplement, No. 601, July 9, 1887" by Various
The same 14 liters of air may then be said to contain carbon dioxide, nitrogen, and oxygen.
"Respiration Calorimeters for Studying the Respiratory Exchange and Energy Transformations of Man" by Francis Gano Benedict
The amount of carbon varies from 85 to 97, and the ash from 3 to 14 per cent.
"Coal" by Raphael Meldola
In experiment 14 an electric light carbon heated to a red heat at its tip, is plunged vertically into a deep glass of liquid oxygen.
"The Progress of Invention in the Nineteenth Century." by Edward W. Byrn

In news:

Carbon-14 in tree rings shows there was a massive influx of cosmic rays in… (University Corporation…).
0 Carbon-14 in tree rings shows there was a massive influx of cosmic rays in AD 774-775.
CERT classes are being offered at the Carbon County Emergency Management Agency Office on the following dates: Sept 14, 20, and 27.
17 Carbon-14, for one 18 East, in Germany 19 Drag (around) 21 Extremely cold 22 Corny reality show set all over the world, with "The".
Dollar sales in the carbonated soft drink (CSD) category totaled $18.3 billion for food, drug and mass merchandise retailers including Walmart for the 52 weeks ending April 14, according to data from Nielsen, New York City.
Team now says it's the likely culprit for sharp increase in amount of radioactive carbon-14.
EPA announced on March 14 that it is proposing to defer, for three years, Clean Air Act permitting requirements for carbon dioxide (CO2) emissions from bioenergy and other biogenic sources.
Topeka — A 14-year-old northeast Kansas girl has sued Gov Sam Brownback's administration in hopes of forcing it to impose limits on carbon dioxide emissions.
Under cap and trade, the state began collecting the new revenue by auctioning "carbon credits" on Nov 14 that essentially permit businesses to release extra carbon dioxide into the atmosphere.
European Commission Unveils Options for New International Carbon Market Mechanism Nov 14, 2012 Printable format Email this Article Search.
14 hospitalized for carbon monoxide exposure.
Issaquah and King County leaders gathered Sept 14 to flip the switch on zHome, the first zero-energy, carbon-neutral multifamily community in the United States.

In science:

In good approximation, the vast majority of neutrons released into the atmosphere are ultimately captured by nitrogen which then decays into carbon-14.
A comparison of delayed radiobiological effects of depleted-uranium munitions versus fourth-generation nuclear weapons
The dotted lines indicate the regions of possible spectral features: amorphous carbon at 6 and 14 µm in R CrB (Lambert et al. 2001) and a possible, unidentified feature near 8 µm in all three.
R CrB Candidates in the Small Magellanic Cloud: Observations of Cold, Featureless Dust with the Spitzer Infrared Spectrograph
The main effect of axial rotation on the evolution of massive PopIII stars is to trigger internal mixing processes which allow stars to produce signi ficant amounts of primary n itrogen 14 and carbon 13.
SPINSTARS at low metallicities
However, these unusual properties may be explained either by an unusual thick circumstellar carbon shell or by a location beyond the Bulge at a maximum distance of ∼ 14 kpc.
R Coronae Borealis stars in the Galactic Bulge discovered by EROS-2
Carbon-nanotube based electrochemical biosensors: A review. Electroanalysis 2005, 17, 7-14. Leeuw, T. K.; Reith, R. M.; Simonette, R. A.; Harden, M. E.; Cherukuri, P.; Tsyboulski, D. A.; Beckingham, K. M. and Weisman, R. B.
Carbon Nanotubes in Biology and Medicine: in vitro and in vivo Detection, Imaging and Drug Delivery
Experimentally Li-intercalation has been proposed by Viro janadara et al.14 who showed that Li, as a highly reactive lightweight monovalent metal, can penetrate the strongly-bound carbon-rich layer and position on top of the SiC substrate.
Role of covalent and metallic intercalation on the electronic properties of epitaxial graphene on SiC(0001)
This event (Figure 14.6) was, in many respects, a carbon copy of the March 5 flare.
Soft Gamma Repeaters and Anomalous X-ray Pulsars: Magnetar Candidates
Figure 14 shows the magnetic moment of a disordered carbon sample before, just after proton irradiation and after one year at room temperature (after irradiation).
Induced Magnetic Order by Ion Irradiation of Carbon-Based Structures
The degree of condensation f of carbon into carbon dust does not approach unity (see Fig. 14), since it is assumed that 20 to 40% of the carbon in molecular clouds forms CO and then is no more available for dust condensation.
Evolution of interstellar dust and stardust in the solar neighbourhood
Contrarely to the other group-14 clathrates (Si, Ge and Sn), the synthesis of the carbon clathrates remains a challenge up to now even if the deposition of C20 or C36 networks, which basic units have a comparable size to the ones of the carbon clathrates, have been prepared6,7 .
First-principles study of lithium-doped carbon clathrates under pressure
This allowed the spectrum to be studied up to a proton-proton excitation energy Epp ≈ 14 MeV when neutrons from reactions on the carbon in the target contributed.
Review of quasi-elastic charge-exchange data in the nucleon-deuteron breakup reaction
It has also been suggested by Tuominen et al.14 , who studied a macroscopic electromechanical system at room temperature, that carbon nanotubes connected to nanoscale metallic grains15,16 , could be used for this purpose.
Dynamics of a three terminal mechanically flexible tunneling contact
TABLE I: Vapor-liquid equilibria of carbon dioxide: present simulation results with the Grand Equilibrium method (GE)7 and the Gibbs ensemble (Gibbs)9 compared to simulation results by Zhang and Duan (Zhang)1 and the reference EOS (eos)14 .
Comment on "An optimized potential for carbon dioxide"
Even if the data are insufficient to determine the absorption and emission bands of typical grains, we suggest that the feature at ∼ 30 µm is not so rare, since it was discovered from ground based observations in 63 Galactic ob jects : 36 evolved carbon stars, 14 PPNe, and 13 PNe (Hony et al. 2002).
An analysis of infrared emission spectra from the regions near the Galactic Center
For carbon-ion radiotherapy, the radiation components need to be handled separately due to variability of relative biological effectiveness with particle charge and energy,14 for which the fluence-correction factor for total dose would not suffice.
Evaluation of plastic materials for range shifting, range compensation, and solid-phantom dosimetry in carbon-ion radiotherapy