Zobrazeno 1 - 10
of 251
pro vyhledávání: '"M. Shelef"'
Publikováno v:
Journal of Assisted Reproduction and Genetics. 25:23-28
The aim of the present study was to compare the quality of embryos derived from sibling oocytes by in vitro fertilization (IVF) or ICSI.Consecutive patients with a less than 40% fertilization rate in a previous standard IVF cycle or with relative mal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bfd9210f382e82727520190eab6a4fe
https://doi.org/10.1007/s10815-007-9188-8
https://doi.org/10.1007/s10815-007-9188-8
Publikováno v:
Gynecological Endocrinology. 14:433-436
We assessed the value of requesting a second semen sample provided within 1 hour of the first in cases of unacceptable ejaculate quality (compared to previous occasions) or very poor semen characteristics. The study population consisted of 109 males
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30176ae3591068e0806406ef0a4823cc
https://doi.org/10.3109/09513590009167715
https://doi.org/10.3109/09513590009167715
Publikováno v:
Journal of Catalysis. 186:334-344
HZSM-5 with SiO 2 /Al 2 O 3 =50 into which 0.5 wt% Cu (Cu/ Al∼0.25) was introduced after the removal of extralattice Al species by basic or acidic treatment shows no inhibition of the irreversible loss of active, tetrahedrally coordinated Cu 2+ sit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f30228f4398e9119c5b5c972d7f2bd4
https://doi.org/10.1006/jcat.1999.2574
https://doi.org/10.1006/jcat.1999.2574
Publikováno v:
Catalysis Letters. 50:1-7
Gd3+-ESR spectroscopy can be used as a sensitive method for the study of lanthanide additives in catalysts. Here we present the results of a comparative study of Gd/SiO2-Al2O3 and Gd/HZSM-5. ESR gives evidence of rigid bonding of isolated Gd3+ ions i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e2a252b9ec896b65a1db3874d1700ad
https://doi.org/10.1023/a:1019050631658
https://doi.org/10.1023/a:1019050631658
Publikováno v:
The Journal of Physical Chemistry. 100:253-264
MgO-supported platinum and platinum−molybdenum catalysts were prepared from organometallic precursors and characterized structurally to determine how the nature of the bimetallic precursors and the treatment conditions affected the interaction betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01dc439a17aee271a728146d8955fbbf
https://doi.org/10.1021/jp951432c
https://doi.org/10.1021/jp951432c
Publikováno v:
Catalysis Today. 27:79-84
A flow cell was designed for in-situ ESR monitoring of the state of copper ions in a working Cu-ZSM-5 catalyst at high temperatures. The equilibrium oxidation state of the copper in the catalyst depends both on the temperature and the composition of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5214be3f85e23ca9ee38c2fcdb76311
https://doi.org/10.1016/0920-5861(95)00174-3
https://doi.org/10.1016/0920-5861(95)00174-3
Autor:
M. Shelef
Publikováno v:
Chemical Reviews. 95:209-225
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::337d97119060214a5ea911edb845c72f
https://doi.org/10.1021/cr00033a008
https://doi.org/10.1021/cr00033a008
Autor:
G. W. Graham, M. Shelef
Publikováno v:
Catalysis Reviews. 36:433-457
The catalytic treatment of motor vehicle exhaust gas has been a feature of all passenger cars in the USA since the 1975 model year. It has since been adopted in all the developed countries as the principal means of con-trolling the emissions from veh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13bf74111d017d9ec563a0494c7e835a
https://doi.org/10.1080/01614949408009468
https://doi.org/10.1080/01614949408009468
Autor:
A.D. Logan, M. Shelef
Publikováno v:
Journal of Materials Research. 9:468-475
Oxyreduction studies of mixed Ce/Pr oxides have been carried out. Temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), and temperature-programmed oxidation (TPO) were used to study the uptake and release of the oxygen. Lar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7dcbace3be3a699bab9c658e1a82ea3
https://doi.org/10.1557/jmr.1994.0468
https://doi.org/10.1557/jmr.1994.0468
Autor:
M. Shelef, C.A. Kukkonen
Publikováno v:
Progress in Energy and Combustion Science. 20:139-148
The concerns about global warming and the California requirements for zero emission vehicles have rekindled the interest in hydrogen as a fuel for passenger vehicles. In 1980 one of the authors (Kukkonen, 1981, SAE Paper 810349) concluded that hydrog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b192c2f0f62a832a18fc6ad05de336f
https://doi.org/10.1016/0360-1285(94)90008-6
https://doi.org/10.1016/0360-1285(94)90008-6