Zobrazeno 1 - 10
of 96
pro vyhledávání: '"J. Virlet"'
Publikováno v:
The Journal of Physical Chemistry B. 108:15494-15502
Structural characterization of calcium silicate hydrate (C-S-H) is of major importance, as it is the main constituent of Portland cement and is responsible for its principal cohesion and durability...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c51049b329135a1ff79f21c807a7e712
https://doi.org/10.1021/jp031174g
https://doi.org/10.1021/jp031174g
Autor:
F. Brunet, § J.-F. Jacquinot, I. Klur, C. Schneider and, J. Virlet, and T. Charpentier, P. Tekely
Publikováno v:
The Journal of Physical Chemistry B. 104:10162-10167
NMR cross-polarization (CP) measurements are usually analyzed assuming that the cross-polarization time TIS of magnetization transfer from the abundant I spins to the rare S spins is shorter than the relaxation time T1ρ in the rotating frame of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b6c767f142ad54ce5c55fc89a830522
https://doi.org/10.1021/jp001342u
https://doi.org/10.1021/jp001342u
Autor:
T. Charpeutier, J. Virlet
Publikováno v:
Solid State Nuclear Magnetic Resonance. 12:227-242
The purpose of this paper is to investigate the interplay between the chemical shielding anisotropy and quadrupole interaction in MQMAS spectra. 59Co in the compounds Na3Co(NO2)6 and trans-Co[(en2)(NO2)2]NO3 provides model systems for such an investi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d76bc9f323b83e03bee702a20e53887
https://doi.org/10.1016/s0926-2040(98)00051-4
https://doi.org/10.1016/s0926-2040(98)00051-4
Publikováno v:
Cement and Concrete Research. 27:1581-1590
Molecular dynamics have been used for a few years to study glass structures. Hydrogen properties were however difficult to simulate. For the study of cement hydrated structures, this technique has not been used. Calcium silicate hydrates (CSH)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::831037ef918d8740d1f64f3f8c2007dc
https://doi.org/10.1016/s0008-8846(97)00161-0
https://doi.org/10.1016/s0008-8846(97)00161-0
Publikováno v:
Advances in Cement Research. 9:99-104
The structural evolution of iron during cement paste degradation is studied. An increased concentration of iron has been observed in the surface layer formed when cement paste comes into contact with an aggressive solution. While C4AF and C3(A, F)SH4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5e9744cc0bbb632910af0246505a9c5
https://doi.org/10.1680/adcr.1997.9.35.99
https://doi.org/10.1680/adcr.1997.9.35.99
Publikováno v:
Journal of Solid State Chemistry. 127:92-97
Molecular dynamics has been used to simulate the structure of calcium silicate hydrates (CSH) having Ca/Si ratios of 0.66 and 0.83. In the absence of labile calcium, silicon nuclear magnetic resonance (NMR) shows that the tetrahedral chains move clos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28ea0aef3ac85610ca0a40aa79edd0b8
https://doi.org/10.1006/jssc.1996.0361
https://doi.org/10.1006/jssc.1996.0361
Publikováno v:
Magnetic Resonance in Chemistry. 34:173-180
Polymerization reactions in dimethyldiethoxylsilane were studied using a new high-resolution 29Si NMR method. This method is a combination of two polarization transfer experiments (DEPT) with a 29Si–29Si two-dimensional INEPT DQF COSY NMR experimen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b15f603b30da960678897b2a79c0d8e9
https://doi.org/10.1002/(sici)1097-458x(199603)34:3<173::aid-omr845>3.0.co
https://doi.org/10.1002/(sici)1097-458x(199603)34:3<173::aid-omr845>3.0.co
Publikováno v:
Magnetic Resonance in Chemistry. 34:100-108
The polarization transfer in the DEPT experiment is analysed as a function of transfer time Δ and variable pulse angle θ for a spin system InIm′Ip′′S. This DEPT experiment applied to 29Si NMR may be tuned for optimum sensitivity and quantitat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7384d340c16c0af108ddbbfe2a8002ce
https://doi.org/10.1002/(sici)1097-458x(199602)34:2<100::aid-omr844>3.0.co
https://doi.org/10.1002/(sici)1097-458x(199602)34:2<100::aid-omr844>3.0.co
Autor:
Bruno Touzo, J. Virlet, Dominique Trumeau, Philip J. Grandinetti, Dominique Massiot, Pierre Florian, J.P. Coutures
Publikováno v:
Solid State Nuclear Magnetic Resonance. 6:73-83
Two-dimensional magic-angle spinning (triple quantum, single quantum) correlation pulse sequences and phase cycles based on the technique of Frydman and Harwood for the reconstruction of the isotropic spectrum of half-integer spin quadrupolar nuclei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e84d1d685f4491e8587ea1874fc3a1d0
https://doi.org/10.1016/0926-2040(95)01210-9
https://doi.org/10.1016/0926-2040(95)01210-9
Publikováno v:
Journal de Chimie Physique. 91:409-418
Une nouvelle experience bidimensionnelle INEPT DQF COSY en RMN HR ( 29 Si) permet d'observer des correlations 29 Si- 29 Si sur des echantillons non enrichis et avec un temps de mesure raisonnable (12h). Les parametres experimentaux sont optimises pou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebc52497a993b17fcfe7e0d7e9a05877
https://doi.org/10.1051/jcp/1994910409
https://doi.org/10.1051/jcp/1994910409