Zobrazeno 1 - 10
of 282
pro vyhledávání: '"John R. Ferraro"'
Autor:
Amy E. McGovern, William E. Fayerweather, Ronald H. Hill, John R. Ferraro, James L. Dodson, Edwin L. Hockman
Publikováno v:
Journal of occupational and environmental hygiene. 12(7)
Asphalt shingle removal (tear-off) from roofs is a major job task for an estimated 174,000 roofers in the United States. However, a literature search showed that there are no published studies that characterize worker inhalation exposures to asphalt
Autor:
Marian Borkowski, Kenneth C. Littrell, Mark P. Jensen, John R. Ferraro, Renato Chiarizia, Pappannan Thiyagarajan
Publikováno v:
Separation Science and Technology. 38:3333-3351
Formation of a third organic phase at high metal loading in the extraction of tetravalent actinides by TBP in aliphatic diluents has been investigated mostly from the standpoint of the composition of the organic phase species before and after phase s
Autor:
Renato Chiarizia, Pappannan Thiyagarajan, John R. Ferraro, Marian Borkowski, Kenneth C. Littrell, Mark P. Jensen
Publikováno v:
Separation Science and Technology. 38:3313-3331
In spite of its technological importance, third phase formation in the extraction of hexavalent actinides from nitric acid solutions into alkane solutions of tri-n-butylphosphate (TBP) has received only limited attention. The focus of the few availab
Publikováno v:
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 32:277-290
The silicon-substituted diphosphonic acid P,P′-di[3-(trimethyl-silyl)-1-propyl] methylenediphosphonic acid, H2DTMSP-[MDP], reacts with metal nitrates in methanol to form complexes M2(DTMSP[MDP])3 for M˭Fe, Eu and Yb and M(DTMSP[MDP])2 for M˭Th. T
Publikováno v:
Solvent Extraction and Ion Exchange. 20:313-330
The infrared reflectance spectra of the third phases formed in the systems UO2(NO3)2/HNO3/20%TBP in n-dodecane and Th(NO3)4/HNO3/20%TBP in n-octane gave evidence for the presence in solution of a significant amount of weakly bonded molecular nitric a
Autor:
Francesco A. Devillanova, John R. Ferraro, Massimiliano Arca, Francesco Isaia, Vito Lippolis, Francesco Lelj, Gaetano Verani, M. Carla Aragoni
Publikováno v:
Canadian Journal of Chemistry. 79:1483-1491
The synthesis and the full spectroscopic characterization (FT-IR, FT-Raman, 31P CP MAS NMR) of trans-bis[O-ethyl-phenylphosphonodithioato]NiII (3) are reported. On the basis of hybrid-Density Functional Theory (DFT) calculations and Extended Hückel
Autor:
Albert W. Herlinger, Renato Chiarizia, Daniel R. McAlister, Richard E. Barrans, John R. Ferraro
Publikováno v:
Separation Science and Technology. 36:687-708
Solvent extraction reagents containing the diphosphonic acid group exhibit an extraordinary affinity for tri-, tetra-, and hexavalent actinides. Their use has been considered for actinide separation and preconcentration procedures. Solvent extraction
Publikováno v:
Solvent Extraction and Ion Exchange. 19:981-992
Infrared studies for the HNO3/0.73 M TBP n-octane system are reported. Two extracted species, TBP · HNO3 and TBP · 2HNO3, were identified in the organic phase. The concentration of the individual species was determined by the analysis of the vibrat
Publikováno v:
Solvent Extraction and Ion Exchange. 17:1195-1217
Hydrogen bonding of dialkyl-substituted diphosphonic acids in nonpolar (toluene and CCl{sub 4}) and alcohol (1-decanol) solutions is examined. The compounds are monomeric in 1-decanol and dimeric or higher in nonpolar organic diluents. Infrared spect