Zobrazeno 1 - 10
of 69
pro vyhledávání: '"U. Chowdhry"'
Autor:
U. Chowdhry
Publikováno v:
Research-Technology Management. 54:18-24
Uma Chowdhry was awarded the 2011 Industrial Research Institute Medal for her extraordinary leadership contributions to science and technology. OVERVIEW: The sheer scale of unprecedented worldwide economic and societal change will inevitably lead to
Autor:
U. Chowdhry
Publikováno v:
Research-Technology Management. 53:29-34
DuPont remains committed to science-based innovation for business growth. OVERVIEW: The fourth quarter of 2008 saw the start of the worst global recession since the 1930s. Yet, after dealing with the initial shock, companies went to work to prepare f
Publikováno v:
Bulletin of Materials Science. 16:665-678
A novel synthetic route for fabricating dense aluminosilicate-based ceramics at relatively low temperatures (⩽1000°C) is described. The method involves ion exchange of an appropriate zeolite powder, followed by fabrication and sintering, to form a
Publikováno v:
Materials Research Bulletin. 23:821-830
The effect at room temperature of ambient level humidity on fine particle YBa2Cu3O7−y powder has been studied. Reaction with moisture, as detected by x-ray diffraction and scanning electron microscopy, was found to proceed rapidly initially (
Autor:
R.B. Flippen, Rajendra K. Bordia, J. B. Michel, Munirpallam Appadorai Subramanian, John D. Bolt, K. J. Morrissey, T. R. Askew, U. Chowdhry, Charlie C. Torardi, Horowitz Harold Saul, Eugene M. McCarron
Publikováno v:
Solid State Ionics. :1087-1099
A variety of synthesis routes for YBa2Cu3O6+x are described, and the resulting powders are compared in terms of their phys ical properties and densification behavior. It is shown that the processibility of the powders depends on their physical charac
Autor:
C.J. Machiels, Fumio S. Ohuchi, L. E. Firment, R. H. Staley, Arthur W. Sleight, U. Chowdhry, A. Ferretti
Publikováno v:
Applications of Surface Science. 19:360-372
Ferric molybdate is 2–4 times as active as pure MoO 3 as a catalyst for methanol oxidation to formaldehyde but shows similar selectivities and kinetics. These catalysts were studied using temperature programmed desorption (TPD), microbalance adsorp
Autor:
William E. Farneth, Arthur W. Sleight, U. Chowdhry, Franklin Chau-Nan Hong, W. H. Cheng, E. M. Mc Carron, C.J. Machiels
Publikováno v:
Applied Catalysis. 25:249-256
Selective oxidation of methanol to formaldehyde has been studied over a series of molybdates, molybdenum oxides, mixed tungsten - molybdenum oxides, and supported molybdenum oxide. Reactor studies, Temperature Programmed Reaction (TPR) and in-situ FT
Autor:
U. Chowdhry, R.B. Flippen, Charlie C. Torardi, Arthur W. Sleight, Eugene M. McCarron, T. R. Askew, M.A. Subramanian, Joseph C. Calabrese, Jagannatha Gopalakrishnan, K. J. Morrissey
Publikováno v:
Physical Review B. 38:225-231
The structures of ${\mathrm{Tl}}_{2}$${\mathrm{Ba}}_{2}$Cu${\mathrm{O}}_{6}$ and ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$Cu${\mathrm{O}}_{6}$ have been solved and refined from single-crystal x-ray diffraction data. The structures are essentially the sa
Publikováno v:
Journal of Solid State Chemistry. 60:101-106
Pure ferric tungstate, Fe 2 (WO 4 ) 3 , has been prepared and characterized for the first time. Ferric tungstate has a structure very similar to that of ferric molybdate with a unit cell volume about 1.5% larger. Decomposition to Fe 2 WO 6 and WO 3 o
Autor:
U. Chowdhry, Munirpallam Appadorai Subramanian, S. J. Poon, K. J. Morrissey, R.B. Flippen, T. R. Askew, Jagannatha Gopalakrishnan, Arthur W. Sleight, C. C. Torardi, Joseph C. Calabrese, Juhn-Jong Lin
Publikováno v:
Physica C: Superconductivity. :608-612
Crystals of the new high temperature superconductor Bi 2 Sr 3−x Ca x Cu 2 O 8+y have been grown and studied. Single crystal x-ray diffraction data were used to determine a pseudo tetragonal structure based on an A-centered orthorhombic cell with a