Supernovae and Californium 254

Californium gleaming.

A late actinide with twenty known isotopes, californium is a manmade transuranic element that does not occur naturally. It was first identified by Glenn Seaborg and co-workers in February 1950 in an experiment that used a 60-inch cyclotron to bombard curium-242 targets with helium ions. Although named primarily for the State of California, it also recognizes the University of California at Berk...

CHAPTER ELEVEN CALIFORNIUM Richard

The discovery of californium came in the era of the syntheses and identifications of other transplutonium elements, following the end of World War II. The discovery of the element californium, like many of the other actinide elements, hinged on the development of new experimental techniques in conjunction with predictions based on nuclear systematics. Californium was named after the University ...

Unusual structure, bonding and properties in a californium borate.

The participation of the valence orbitals of actinides in bonding has been debated for decades. Recent experimental and computational investigations demonstrated the involvement of 6p, 6d and/or 5f orbitals in bonding. However, structural and spectroscopic data, as well as theory, indicate a decrease in covalency across the actinide series, and the evidence points to highly ionic, lanthanide-li...

Bez nazwy-254

254-259 Grenga

Osteoarthritis (OA), also erroneously called degenerative joint disease, represents failure of a diarthrodial joint. In idiopathic OA, the most common form of the disease, no predisposing factor is apparent. Secondary OA is pathologically indistinguishable from idiopathic OA, but is attributable to an underlying cause, such as trauma or metabolic and endocrine diseases.1 Major trauma and repeti...