Results 301 to 310 of about 912,361 (332)
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2013
Isotopic information determined by mass spectrometry can be used in a wide variety of applications. Broadly speaking these could be classified as "passive" applications, meaning that they use naturally occurring isotopic information, and "active" applications, meaning that the isotopic distributions are manipulated in some way.
Alan L, Rockwood, Magnus, Palmblad
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Isotopic information determined by mass spectrometry can be used in a wide variety of applications. Broadly speaking these could be classified as "passive" applications, meaning that they use naturally occurring isotopic information, and "active" applications, meaning that the isotopic distributions are manipulated in some way.
Alan L, Rockwood, Magnus, Palmblad
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International Journal of Dermatology, 1995
Abstract Background. The occurrence of a new skin disorder exactly at the site of another one, already healed and unrelated, was first described in 1955. In 1985, Wolf et al. recognized that we are dealing with a dermatologic phenomenon and established a precise definition for this phenomenon.
WOLF R +3 more
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Abstract Background. The occurrence of a new skin disorder exactly at the site of another one, already healed and unrelated, was first described in 1955. In 1985, Wolf et al. recognized that we are dealing with a dermatologic phenomenon and established a precise definition for this phenomenon.
WOLF R +3 more
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Diffusion Isotope Effects in Isotope Mixtures
Berichte der Bunsengesellschaft für physikalische Chemie, 1972AbstractThe tracer diffusion of deuterium and tritium in the β‐phase of PdHn has been measured by means of special techniques, the time lag method with mass spectrometer or counter tube as detector, and the decay function of isotope exchange. It has been found that D atoms as tracer in β‐PdHn, i.e.
G. Sicking, E. Wicke, E. Gans, B. Bonn
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Terra Nova, 1998
The closure of isotopic chronometers to loss or exchange of radiogenic daughters is best analysed in terms of phenomena that induce recrystallization, i.e. fluid circulation and strain. In the presence of these fast phenomena, temperature is not a rate‐controlling parameter for isotope transport. Only in those rare instances where no fast mechanism can
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The closure of isotopic chronometers to loss or exchange of radiogenic daughters is best analysed in terms of phenomena that induce recrystallization, i.e. fluid circulation and strain. In the presence of these fast phenomena, temperature is not a rate‐controlling parameter for isotope transport. Only in those rare instances where no fast mechanism can
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The British Journal of Radiology, 1958
This unit for dispensing radioactive liquids has been designed to reduce the radiation hazard in handling the weekly consignment of 131I, which usually amounts to 100 mc. The problem was to extract the active liquid from the standard Amersham bottle and to prepare a stock solution from which desired amounts could be dispensed. The apparatus is shown in
A. Sivyer +4 more
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This unit for dispensing radioactive liquids has been designed to reduce the radiation hazard in handling the weekly consignment of 131I, which usually amounts to 100 mc. The problem was to extract the active liquid from the standard Amersham bottle and to prepare a stock solution from which desired amounts could be dispensed. The apparatus is shown in
A. Sivyer +4 more
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1980
Publisher Summary This chapter describes several methods by which isotopes of uranium and other elements are separated. There are four methods that depend on differences in mass numbers A: (1) ion motion in a magnetic field, (2) diffusion of particles through a membrane, (3) motion with centrifugal force, and (4) atomic response to a laser beam.
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Publisher Summary This chapter describes several methods by which isotopes of uranium and other elements are separated. There are four methods that depend on differences in mass numbers A: (1) ion motion in a magnetic field, (2) diffusion of particles through a membrane, (3) motion with centrifugal force, and (4) atomic response to a laser beam.
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Journal of the American Medical Association, 1948
This year marks two important anniversaries for radioactivity in the fields of biology and medicine: (1) the golden anniversary of the discovery of radium for use in radiation treatment and (2) the silver anniversary of the use of radioactive atoms for tracing stable atoms—that is, of the tracer atom technic.
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This year marks two important anniversaries for radioactivity in the fields of biology and medicine: (1) the golden anniversary of the discovery of radium for use in radiation treatment and (2) the silver anniversary of the use of radioactive atoms for tracing stable atoms—that is, of the tracer atom technic.
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