Results 361 to 370 of about 1,234,720 (380)
Some of the next articles are maybe not open access.
2009
Publisher Summary This chapter covers the abundance estimation, the range of techniques by which the size of a population of marine mammals can be estimated. When it is difficult to estimate absolute abundance with an acceptably low bias, relative abundance indices are often used instead.
Anne E. York, Stephen T. Buckland
openaire +2 more sources
Publisher Summary This chapter covers the abundance estimation, the range of techniques by which the size of a population of marine mammals can be estimated. When it is difficult to estimate absolute abundance with an acceptably low bias, relative abundance indices are often used instead.
Anne E. York, Stephen T. Buckland
openaire +2 more sources
2003
Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. We review here measurements acquired on the D/H, 12C/13C, 16O/18O, 14N/15N, 32S/34S ratios in dust and gases, and discuss their cosmogonic implications.
Altwegg, Kathrin+1 more
openaire +3 more sources
Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. We review here measurements acquired on the D/H, 12C/13C, 16O/18O, 14N/15N, 32S/34S ratios in dust and gases, and discuss their cosmogonic implications.
Altwegg, Kathrin+1 more
openaire +3 more sources
Abundances of the elements: Meteoritic and solar
, 1989E. Anders, N. Grevesse
semanticscholar +1 more source
2018
This chapter examines one of the most prominent themes which recur in urban panegyric: the city’s ability to generate and apply commerce and resources. This was deemed a specifically urban phenomenon and, especially from the twelfth century onwards, received the most scathing critique.
openaire +1 more source
This chapter examines one of the most prominent themes which recur in urban panegyric: the city’s ability to generate and apply commerce and resources. This was deemed a specifically urban phenomenon and, especially from the twelfth century onwards, received the most scathing critique.
openaire +1 more source
A redetermination of the isotopic abundances of atmospheric Ar
, 2006Jee-Yon Lee+6 more
semanticscholar +1 more source
A comparison of selected mRNA and protein abundances in human liver
Electrophoresis, 1997L. Anderson, J. Seilhamer
semanticscholar +1 more source
Cosmic abundances of stable particles: Improved analysis
, 1991P. Gondolo, G. Gelmini
semanticscholar +1 more source