Versions of elements with consistent proton counts but varying neutron numbers. Isotopes have opened avenues for research in nuclear physics. 4 Allotropes A structurally differentiated form of an element that exhibits allotropy. Isotopes One of two or more atoms having the same atomic number but diff...
Isotopes are variations of elements with the same number of protons but different numbers of neutrons, affecting mass. Isomers have identical molecular formulas but differ in atom arrangements or bonds, influencing structure and properties.
Northern air parcels reaching the foothills of the northern Brooks Range from a frozen Arctic Ocean have a high d-excess value (Fig. 2), as a frozen Arctic is an arid vapor source that results in relatively depleted δ 18O and higher d-excess values (Fig. 3c). Conversely, an ...
The results available in the literature for homologous series of organic anions and cations have been utilized by both parties to prove their respective points ; but, since we have no definite knowledge as to what amount of solvent accompanies any ion in its journey towards an electrode, and ...
Distinguishing between annual and non-annual growth lines may have dramatic effects on the accuracy of age and growth rate estimates of an individual. In addition, since elemental composition of biogenic carbonates has been used as an indicator of environmental conditions (Druffel, 1997, Kanduc et ...
Stable oxygen isotopes of calcareous microfossil tests – primarily planktic and benthic foraminifera –have been used to reveal changes in global ice volume, ocean circulation, and temperatures over decadal to millennial timescales (e.g., Shackleton, 1974; Lisiecki and Raymo, 2005). Ostracodes, sm...
provides evidence of not only what species were being targeted but also the ways in which they may have been butchered and otherwise prepared and, above all, what the culling patterns can tell about animal husbandry, production and consumption. However, disposal practices in the past, along with...
Forty-one diamonds sourced from the Juina-5 kimberlite pipe in Southern Brazil, which contain optically identifiable inclusions, have been studied using an
In the case of Tell Humeida, the conclusions that could be drawn were only tentative, but we considered them interesting as they represented a novelty for Middle Euphrates sites of this age. The isotopic signal recorded in sheep bones may have been due to contributions from various cultivated ...
The possibility to perform punctual analyses and the quickness with which these are performed are the advantages of this method, especially for zircon grains, which can have different ages at the edge and in the core. Another advantage of this method is the low susceptibility to contamination, ...