introduction - les impuretes, meme en faibles teneurs, modifient beaucoup les proprietes physiques des metaux. ainsi, pour une etude profonde de ces proprie, tes , on a besion d'un metal extremement pur. la methode de la zone fondue a permis cette realisation . principe - dans la methode de purification dite de la «zone fondue» decouverte par pfann en 1952, une courte zone liquide est depl...

N-propylsalicylidene based on silica as ion exchanger (IE) was used for the separation by complexation of Mn2+, Co2+, Ni2+, Cu2+, Hg2+, Cr3+, Fe3+, and UO22+ from their parent solutions. IE and its metal complexes are characterized by elemental analysis, electronic and infrared spectra, in addition to thermal analysis in atmospheric pressure. The mode of chelation and the proposed geometric str...

' L aboratoire de G éochim ie e l M étallogén ie (C N R S VA 196), U niversité P ierre et M arie Curie, 4 p la ce Jussieu, 75252 P aris C édex 05 (France) ' Faculty o f Science, U niversity o f Tokyo, Bunkyo-ku, T okyo 113 (Japan) ' D 3G M , IF R E M E R , C entre de Brest, B .P. 337, 29273 Brest C édex (France) 4 L aborato ire de Géochimie, U niversité L ibre de Bruxelles, 50 Av. F.D. Roosevel...

m o n o ch o ri o n ic /d ia m n io ti c tw in g es ta ti o n s: a s ys te m at ic li te ra tu re r ev ie w . J U lt ra so u n d M ed 2 0 0 7 N o v; 26 (1 1) :1 4 91 -8 . 3) E va n s M I, G o ld b er g JD , H o re n st ei n J, W ap n er R J, A yo u b M A , S to n e J, e t al . S el ec ti ve t er m in at io n f o r st ru ct u ra l, ch ro m o so m al , a n d m en d el ia n a n o m al ie s: in te ...

Pretreatment of tissue culture cells with alpha interferon (IFN-alpha) inhibits the transcription of herpes simplex virus type 1 (HSV-1) immediate-early (IE) genes, an effect which has been attributed to reduced transactivation of IE promoters by the virion protein VP16. Our previous demonstration that IFN-alpha inhibited the replication of the HSV-1 mutant in1814, which has a mutated VP16 unab...

Z u r U n tersuchung d e r K o m p lex b ild u n g zwischen P o ly m o ly b d a tio n en u n d P e r jo d sä u re bzw . N a triu m ­ p e r jo d a t b ie ten sich zw ei p rin z ip ie ll verschiedene U n tersuchungsm öglichkeiten an , um zu A ussagen ü b e r A rt, G röße u n d B estän d ig k e it d e r K om plex­ ionen in L ösung zu k o m m e n : 1. E ine p rä p a ra tiv e U n te rs u c h u n g 1...

BACKGROUND The emergence of a primitive neuroectodermal tumor (PNET) within a germ-cell tumor (GCT) is rare. We assess the prognosis and response to treatment. PATIENTS AND METHODS Eighty-one patients were identified. Selected patients were treated with cyclophosphamide 1200 mg/m(2), doxorubicin 75 mg/m(2), and vincristine 2 mg i.v. alternating with ifosfamide 1.8 g/m(2) x 5 days plus etoposi...