Results 301 to 310 of about 486,624 (356)

Unravelling social status in the first medieval military order of the Iberian Peninsula using isotope analysis. [PDF]

open access: yesSci Rep
Pérez-Ramallo P   +6 more
europepmc   +1 more source

Isotopic catalysis and isotopic analysis

Russian Journal of Physical Chemistry B, 2013
Isotopes with magnetic nuclei accelerate the biochemical reactions of adenosine triphosphate synthesis by a factor of two to three. An isotope effect in which isotopes are preserved in the reaction system is known as isotopic catalysis. It has been revealed in enzymatic reactions catalyzed by magnesium, zinc, and calcium ions.
Yu. A. Karpov   +4 more
openaire   +2 more sources

Stable Isotope Analysis

2013
Abstract Reports on analytical methods for determining the geographical origin of agricultural products have been increasing since the 1980s [49] . The development of new techniques is highly desirable for consumers, agricultural farmers, retailers and administrative authorities.
Carla Rodrigues   +4 more
openaire   +4 more sources

Isotope dilution analysis for speciation

Analytical and Bioanalytical Chemistry, 2003
The advantages of isotope dilution analysis for speciation in the metal species are described. The species-unspecific mode of different species provides accurate and precise determination of the element, because the quantification parameter is an isotope ratio, in spite of an absoluted intensity.
openaire   +3 more sources

Isotope Dilution Analysis

1971
This chapter describes the use of radioactive isotope dilution analysis in combination with various analytical separation techniques for the identification and quantitative determination of a labeled substance and its metabolite(s) in laboratory animals and man.
Anthony M. Guarino, Vincent T. Oliverio
openaire   +2 more sources

The design and analysis of isotope experiments

The American Journal of Medicine, 1960
Abstract The importance of quantitative isotope technics in the study the metabolism of the whole body is discussed. A number of simple model systems are analyzed and approximate numerical solutions are presented for the investigator who does not require the added precision of more complex mathematical analyses.
openaire   +3 more sources

An Isotopic Analysis of the Diet of the Greenland Norse

Journal of the North Atlantic, 2012
Abstract Our understanding of the Norse dietary adaptations to their Greenlandic home comes primarily from sparse historical records, from what is known of the Norse dietary economy in other North Atlantic lands, and from zooarchaeological examinations of the animal bones found in the various excavations of Norse Greenlandic sites which have taken ...
Nelson, D.E.   +4 more
openaire   +4 more sources

Isotopic analysis of oxygen in water

The International Journal of Applied Radiation and Isotopes, 1958
Abstract A semimicro method for the oxidation of water to oxygen for mass spectrometry has been developed. Water samples of 25–100 mg are oxidized by bromine in alkaline solution in presence of cobaltic oxide. Paзpaбoтaн пoлyмикpoмeтoдoкиcл eния вoды дo киcлopoдa для мacc-cпeктpoмeтpии Пpoбы вoды в 25–100 мг oкиcляютcя щeлo чным pacтвopoм бpoмa в ...
openaire   +3 more sources

Isotopic spectral analysis of helium with the aid of an isotope filter

Journal of Applied Spectroscopy, 1966
As simple photoelectric method for the isotopic analysis of helium (He3-He4) based on measurement of the emission of the He 10830 A (23P0,1,2-23S1) line components belonging only to the He3 isotope has been developed. Isolation of these components from the overall line emission was ettected by means ot an isotopic filter in the form of an absorption ...
B. V. L'vov, V. I. Mosichev
openaire   +2 more sources

SPECTRAL ANALYSIS OF ISOTOPIC COMPOSITION [PDF]

open access: possibleSoviet Physics Uspekhi, 1959
Instrumentation for spectral analysis of the isotopic content is described, and data on He, Li, Pb, and U isotopic compositions are reviewed. (R.V.J.)
openaire   +1 more source

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