Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Matatiahu T. Gehatia"'
Autor:
D. R. Wiff, Matatiahu T. Gehatia
Publikováno v:
Biophysical Chemistry. 5:199-206
The ill-posed problem of inferring a molecular weight distribution from ultracentrifuge equilibrium sedimentation data at a single rotor velocity has been circumvented by application of a regularization and quadratic programming technique, This has b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cce889a0cddcd3cd7e3516b89b7a4773
https://doi.org/10.1016/0301-4622(76)80035-x
https://doi.org/10.1016/0301-4622(76)80035-x
Publikováno v:
Journal of Polymer Science: Polymer Physics Edition. 13:275-284
Two different polybenzimidazole (PBI) samples have been investigated in order to correlate the differences in molecular weight distribution (MWD) with changes in the elastic modulus and strength of undrawn and drawn fibers. It has been found that wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6507389c9748500ba095172a70db051
https://doi.org/10.1002/pol.1975.180130205
https://doi.org/10.1002/pol.1975.180130205
Autor:
D. R. Wiff, Tsu-Tzu Tsai, Matatiahu T. Gehatia, W. Wade Adams, Harold Rosenberg, Albert Fratini
Publikováno v:
Journal of the American Chemical Society. 98:8083-8087
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fe8806000e2f58ae3ee43d278edf8b2
https://doi.org/10.1021/ja00441a035
https://doi.org/10.1021/ja00441a035
Autor:
Matatiahu T. Gehatia, D. R. Wiff
Publikováno v:
European Polymer Journal. 8:585-597
The average molecular weights of three narrow polystyrene fractions were investigated by conventional techniques of velocity and equilibrium sedimentation. These fractions were then combined to form a new sample with a known molecular weight distribu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b24562ce0d5cc0e019302dea21d21b46
https://doi.org/10.1016/0014-3057(72)90135-8
https://doi.org/10.1016/0014-3057(72)90135-8
Autor:
D. R. Wiff, Matatiahu T. Gehatia
Publikováno v:
Journal of Macromolecular Science, Part B. 6:287-307
Determination of a molecular weight distribution from equilibrium sedimentation has been significantly improved by incorporating linear programming into Tikhonov's regularization method. The conventional way of computation failed because the Fujita e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::128a219abc10a83444a8a09a215abd8c
https://doi.org/10.1080/00222347208212879
https://doi.org/10.1080/00222347208212879
Autor:
Matatiahu T. Gehatia
Publikováno v:
Kolloid-Zeitschrift & Zeitschrift für Polymere. 201:116-123
The conditions necessary for the valid assumption of the stationary state during polymerization by free radical initiators have been considered mathematically. A differential equation characterizing the sum of the concentrations of all free radicals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1e59c15941e0d1db2a8b21a5b16fd43
https://doi.org/10.1007/bf01520494
https://doi.org/10.1007/bf01520494
Autor:
Matatiahu T. Gehatia, D. R. Wiff
Publikováno v:
Journal of Polymer Science Part A-2: Polymer Physics. 8:2039-2050
The Fujita equation relating molecular weight distribution to concentration of solution subjected to centrifugal forces in equilibrium proved to be an improperly posed problem in the Hadamard sense. Application of Tikhonov's regularizing functions le
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44af00ce25d9da32789a0817866c700e
https://doi.org/10.1002/pol.1970.160081201
https://doi.org/10.1002/pol.1970.160081201
Autor:
Matatiahu T. Gehatia, W. Wade Adams, Albert Fratini, Harold Rosenberg, Tsu-Tzu Tsai, D. R. Wiff
Publikováno v:
Chemischer Informationsdienst. 8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16069f8b0441c337f85855c69a8bf402
https://doi.org/10.1002/chin.197710286
https://doi.org/10.1002/chin.197710286
Within the past decade easy access to high speed digital computers has renewed interest in deriving a molecular weight distribution from equilibrium sedimentation-diffusion data. One of the computational schemes which appears most promising is the Si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::deb813555f1ccd32f7f6600f1028e27e
https://doi.org/10.21236/ad0709885
https://doi.org/10.21236/ad0709885
The equation relating molecular weight distribution of a polymer to the experimental function of concentration appearing in quilibrium sedimentation with the ultracentrifuge is nonsolvable because it is an improperly posed problem in the Hadamard sen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e2396559848bdf11d85444cdd9c5a00
https://doi.org/10.21236/ad0761818
https://doi.org/10.21236/ad0761818