Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Helena, Štěpánková"'
Publikováno v:
Molecules, Vol 29, Iss 3, p 738 (2024)
Dynamic nuclear polarization for nuclear magnetic resonance (NMR) spectroscopy and imaging uses free radicals to strongly enhance the NMR signal of a compound under investigation. At the same time, the radicals shorten significantly its nuclear spin
Externí odkaz:
https://doaj.org/article/c729658634794638a4784c40bb1713aa
Publikováno v:
Minerals, Vol 10, Iss 10, p 852 (2020)
In the last 20 years, laboratory work on geopolymer technology has been confronted with the necessity to determine whether a certain clay material has the properties necessary to form genuine geopolymer when thermally treated and alkalized. The asses
Externí odkaz:
https://doaj.org/article/6712e7fe1bae4242899db4dee0f4088d
Autor:
Vladimir V. Matveev, Mária Šoltésová, Luis M. Varela, Alexandr V. Ievlev, Helena Štěpánková, Erkki Lähderanta
Publikováno v:
Magnetic Resonance in Chemistry. 60:221-225
The closest environment of Al3+ cations was analyzed in detail in solutions of aluminum nitrate in the prototypical protic ionic liquid ethyl ammonium nitrate (EAN) using 1 H and 14 N nuclear magnetic resonance (NMR) spectra. For Al (NO3 )3 -EAN mixt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14f342f507c89e1e543978224a8aeed5
https://doi.org/10.1002/mrc.5220
https://doi.org/10.1002/mrc.5220
Publikováno v:
The Journal of Chemical Physics. 158:124308
Behavior of individual molecules of normal and heavy water in beryl single crystals was studied by $^1$H and $^2$H nuclear magnetic resonance spectroscopy. From temperature dependences of the spectra we deduce that type-I water molecules embedded in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a908e919f608f4005c0eff4c1d94b2ac
https://doi.org/10.1063/5.0131510
https://doi.org/10.1063/5.0131510
Autor:
Ivan V. Pleshakov, V. Chlan, Anastasia Sklyarova, Vladimir V. Matveev, Helena Štěpánková, Vadim Igorevich Popkov
Publikováno v:
Applied Magnetic Resonance. 51:1701-1710
NMR spectra of 57-Fe dispersed europium orthoferrite in powder samples with micro- and nanocrystalline particles were studied for the first time. The material was synthesized by glycine-nitrate combustion, which allowed to obtain the specimens with g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d0f18d37714515b22cbf18d9e141796
https://doi.org/10.1007/s00723-020-01224-y
https://doi.org/10.1007/s00723-020-01224-y
Publikováno v:
Journal of Spectroscopy, Vol 2015 (2015)
Effect of cytosine methylation on DNA duplexes was studied by using a model system of three self-complementary DNA octamers containing central CpG motif surrounded by a couple of AT base pairs, CAACGTTG, CATCGATG, and CTTCGAAG, and their analogues wi
Externí odkaz:
https://doaj.org/article/c31bdb66caca4cb68a74c2f58c3b7a74
Autor:
Vladimir V, Matveev, Alexandr, Ievlev, Mária, Šoltésová, Helena, Štěpánková, Erkki, Lähderanta, Luis M, Varela
Publikováno v:
Magnetic resonance in chemistry : MRCREFERENCES. 60(2)
The closest environment of Al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::adc7aaf9c0a7e070091bef45163d6ced
https://pubmed.ncbi.nlm.nih.gov/34561911
https://pubmed.ncbi.nlm.nih.gov/34561911
Autor:
Martin Nikl, Y. Fomichov, Yu. Zagorodniy, J. Pejchal, V. Chlan, Helena Štěpánková, Valentin V. Laguta
Publikováno v:
Journal of Physics and Chemistry of Solids. 126:93-104
In this study, the distributions of aluminum and gallium atoms over the tetrahedral and octahedral sites in the garnet structure were investigated in mixed Lu3Al5-xGaxO12 crystals by using 27Al and 71Ga magic angle spinning nuclear magnetic resonance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ce6c24f99a576f079a369f2b2e6efd1
https://www.sciencedirect.com/science/article/pii/S0022369718314069
https://www.sciencedirect.com/science/article/pii/S0022369718314069
Publikováno v:
Minerals
Volume 10
Issue 10
Minerals, Vol 10, Iss 852, p 852 (2020)
Volume 10
Issue 10
Minerals, Vol 10, Iss 852, p 852 (2020)
In the last 20 years, laboratory work on geopolymer technology has been confronted with the necessity to determine whether a certain clay material has the properties necessary to form genuine geopolymer when thermally treated and alkalized. The asses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::345744ec620e0fd7a39e4c5a199882b5