Results 261 to 270 of about 77,269 (309)
Mandibular bone mass density in a medieval population and its relationship with stable isotopes δ13C and δ15N. [PDF]
OdontologyLópez-Leyva C +5 more
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Insights on long-term ecosystem changes from stable isotopes in historical squid beaks. [PDF]
BMC Ecol EvolGolikov AV +10 more
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2016
Abstract Stable isotopes provide traceability throughout the ocean. The isotopes of a given chemical element have the same electronic structure and the same chemical behavior but slightly different weights. Therefore, slight variations of their relative abundance occur in nature because the atom diffusion speed and the atom bond strength
Matthieu Roy-Barman, Catherine Jeandel
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Abstract Stable isotopes provide traceability throughout the ocean. The isotopes of a given chemical element have the same electronic structure and the same chemical behavior but slightly different weights. Therefore, slight variations of their relative abundance occur in nature because the atom diffusion speed and the atom bond strength
Matthieu Roy-Barman, Catherine Jeandel
+4 more sources
2020
High precision deuterium and 13C measurement by continuous flow-IRMS: Organic and position-specific isotope analysis. Carbon isotope effects on key reactions in plant metabolism and 13C-patterns in natural compounds. Intramolecular deuterium distributions and plant growth conditions. Stable isotope studies of soil nitrogen.
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High precision deuterium and 13C measurement by continuous flow-IRMS: Organic and position-specific isotope analysis. Carbon isotope effects on key reactions in plant metabolism and 13C-patterns in natural compounds. Intramolecular deuterium distributions and plant growth conditions. Stable isotope studies of soil nitrogen.
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1996
Stable isotopes serve as naturally occurring tracers that can provide much information about how chemical reactions proceed in nature, such as which reactants are consumed and at what temperatures reactions occur. The stable isotopes of several of the lighter elements are sufficiently abundant and fractionate strongly enough to be of special usefulness.
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Stable isotopes serve as naturally occurring tracers that can provide much information about how chemical reactions proceed in nature, such as which reactants are consumed and at what temperatures reactions occur. The stable isotopes of several of the lighter elements are sufficiently abundant and fractionate strongly enough to be of special usefulness.
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Embryotoxicity of Stable Isotopes and Use of Stable Isotopes in Studies of Teratogenetic Mechanisms
The Journal of Clinical Pharmacology, 1986Experiments on teratogenic effects of stable isotopes from our own and other laboratories are evaluated. In the first series of investigations, the enrichment of the stable isotope 13C derived from U‐13C‐glucose was studied in mouse embryos at various stages of development, including limb buds in organ culture.
H, Spielmann, H, Nau
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Stable isotopes and a changing world
Oecologia, 2023The measurement of naturally occurring stable isotope ratios of the light elements (C, N, H, O, S) in animal tissues and associated organic and inorganic fractions of associated environments holds immense potential as a means of addressing effects of global change on animals.
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Stable Isotopes: Origins and Safety
The Journal of Clinical Pharmacology, 1986Fundamental studies of the atomic elements in the first quarter of the 20th century resulted in the recognition of the isotopes of oxygen, carbon, nitrogen, and finally hydrogen. The unique character of a hydrogen isotope led quickly to its enrichment, to the investigation of its biologic effects, and ultimately to its use as a tracer in biologic ...
P D, Klein, E R, Klein
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European Journal of Pediatrics, 1997
The increased employment of stable isotope tracers for diagnostic and research purposes frequently raises questions on potential risks associated with their use, which is of particular importance in the paediatric age group. Biological effects and the potential of adverse events has been evaluated in a large number of animal and, in part, also human ...
B, Koletzko, T, Sauerwald, H, Demmelmair
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The increased employment of stable isotope tracers for diagnostic and research purposes frequently raises questions on potential risks associated with their use, which is of particular importance in the paediatric age group. Biological effects and the potential of adverse events has been evaluated in a large number of animal and, in part, also human ...
B, Koletzko, T, Sauerwald, H, Demmelmair
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Stable isotopes in ecological studies
Oecologia, 2005Stable isotope ratio analyses at natural abundance levels are an increasingly useful tool in ecological studies, with new papers being published in nearly every issue of Oecologia and other ecological journals. In April 2004, the National Institute of Water and Atmospheric Research (NIWA) and the Institute of Geological and Nuclear Sciences (IGNS) co ...
David R, Thompson +4 more
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