In the geochemistry of rare earth elements of the sedimentary processes, the differentiation in behavior and abnormal redistributions of lanthanides
within the REE composition are probably impossible without the participation of the oil and gas hydrocarbons determining the redox conditions of the environment, and never pass without the isomorphism of lanthanides
The systematics of the excitation energies of the low-lying states as a function of neutron number changing from 84 to 100 in the even-even lanthanides
Nd/Sm/Gd/Dy isotopes in the mass region 144-166 and the actinide Th/U isotopes in the mass region 224-238 are presented in Figures (1,2).
Although the lanthanides
are 'rare earths' some, like neodymium, actually occur more frequently than many more common metals.
Research works regardihg the obtaining of an electrode micro-alloyed with lanthanides
for electric arc clading.
In the same samples, TSH and 17-OHP were measured according to the instruction manuals of the dissociation-enhanced lanthanide
fluorescence immunoassay (DELFIA[R]) test kits Neonatal 17a-hydroxyprogesterone and Neonatal hTSH (PerkinElmer).
Synergistic solvent extraction of trivalent lanthanides
and actinides by mixtures of 1-phenyl-3-methyl4-benzoyl-5-pyrazolone and neutral oxodonors.
Prof Thorri Gunnlaugsson, an expert in lanthanide
chemistry for sensing applications at Trinity College Dublin, said: "This method is fast and more reliable than the bioassay used today.
The emphasis of this announcement is on the ions, complexes, and organometallic compounds of the transition metals known as lanthanides
and actinides, post-transition metals, and metalloid elements.
Experiments at low energy, below 8 keV, at the K edges of the early transition metals and the L edges of early lanthanides
have been more difficult to perform, because of absorption by the Be windows in the beam line and by the samples themselves.
The last major change to the table was in the 1940s, when Nobel Laureate Glenn Seaborg at the University of California, Berkeley created a separate group for the lanthanides
and actinides--the rare earth and radioactive elements.
Despite these efforts, little progress has been reported in the preparation of homoleptic complexes composed of low-valent transition metals and lanthanides
form very stable complexes with chelating (i.