Abstract: Magnetic nanoparticles exhibiting enhanced heating ability in thermotherapeutic applications are described, as are several strategies to conjugate such nanoparticles. Methods for using conjugated nanoparticles are also provided.

Abstract: This invention relates to biocompatible and biodegradable polymers which are able to bind diagnostic and therapeutic radioisotopes, and the therapeutic use of the same as well as the synthesis of such polymers. It further relates to the preparation of functional implants from these materials, including nanospheres, microspheres, liposomes, micelles, coatings, films, fibers, and foils.

Abstract: The invention involves a process for separating actinides and lanthanides by liquid-liquid extraction by means of calixarenes. These calixarenes have the formula: with R1 and R2 being alkyl groups or o-nitrophenoxy alkyl groups and R3 and R4 being aryl groups, and they are used in an organic liquid phase containing an organic diluent. The diluent and the calixarene concentration of the organic phase are chosen so as to ensure an enrichment of the organic phase with the actinide(s) and/or lanthanide(s) to be separated from an aqueous acid or saline solution.

Abstract: The invention relates to novel calixarenes of formula: ##STR1## in which m is equal to 0 or 1, n is an integer from 2 to 8, with 4.ltoreq.n(m+1).ltoreq.8,R.sup.1 and R.sup.2, which can be the same or different, are alkyl or O-nitrophenoxyalkyl groups andR.sup.3 and R.sup.4, which can be the same or different, are alkyl or aryl groups.The calixarenes can be used for extracting actinides and lanthanides from aqueous solutions from spent fuel reprocessing.