Zobrazeno 1 - 10 of 11 pro vyhledávání: '"Vera Penkavova"'
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Akademický článek
Breaking of rod-shaped model material during compression
Autor: Lukas Kulaviak, Vera Penkavova, Marek Ruzicka, Miroslav Puncochar, Petr Zamostny, Zdenek Grof, Frantisek Stepanek, Marek Schongut, Jaromir Havlica
Publikováno v: EPJ Web of Conferences, Vol 140, p 07019 (2017)
The breakage of a model anisometric dry granular material caused by uniaxial compression was studied. The bed of uniform rod-like pasta particles (8 mm long, aspect ratio 1:8) was compressed (Gamlen Tablet Press) and their size distribution was measu
Externí odkaz: https://doaj.org/article/d6700cac07744175bd4606d9ba14336f
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3
Design of the reversible biphasic arrangement in the microfluidic chip reactor for asymmetric hydrogenation reactions
Autor: Petr Kluson, Stanislav Hejda, Vera Penkavova, Hana Vychodilova, Magdalena Bendová, Petr Stavarek, Marek Došek
Publikováno v: Chemical Engineering Research and Design. 153:537-546
Design of the reversible biphasic system for a practical use in asymmetric hydrogenation performed in a microfluidic chip reactor is reported. Methylacetoacetate (MAA) was transformed to (R)-methylhydroxybutyrate over optically pure (R)-Ru-BINAP as a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2263ee6151490445e98771aeee9b7c57
https://doi.org/10.1016/j.cherd.2019.11.023
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4
Stereoselective synthesis of optical isomers of ethyl 4-chloro-3-hydroxybutyrate in a microfluidic chip reactor
Autor: Petra Curinova, Vera Penkavova, Stanislav Hejda, Petr Stavarek, Petr Kluson, Hana Vychodilova, Natalie Jaklova
Publikováno v: Journal of Flow Chemistry. 9:221-230
Ethyl (R)-4-chloro-3-hydroxybutyrate ((R)-CHBE) is a versatile fine chemistry intermediate. It is used as a precursor in the synthesis of several pharmacologically valuable products, including L-carnitine. It is usually produced by means of stereosel
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a684210d9fba7c2893f1167c8a4a9f5
https://doi.org/10.1007/s41981-019-00043-y
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5
Compression of anisometric granular materials
Autor: P. Zamostny, Vera Penkavova, Marek Schöngut, Zdeněk Grof, Miroslav Puncochar, Marek C. Ruzicka, Lukáš Kulaviak, Frantisek Stepanek
Publikováno v: Powder Technology. 342:887-898
Granular particles of anisometric shape are common in many technologies and the knowledge of their compression response is needed for their handling, storage, transport and flow. Despite its importance, a little attention has been paid to this proble
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c11c673dd1a8c8bc4551fcad88dd0d36
https://doi.org/10.1016/j.powtec.2018.10.031
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6
Anisometric granular materials: compression and shear properties
Autor: Lukáš Kulaviak, Vera Penkavova, Miroslav Puncochar, Marek C. Ruzicka
Publikováno v: Granular Matter. 23
Random layers of dry coarse anisometric grains of eight different materials were studied experimentally. The static and dynamic parameters of compression and shear tests were evaluated. The relation between compaction and flow properties was determin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd7b6e24ad94de736d6e3dc2a4f9a832
https://doi.org/10.1007/s10035-020-01082-2
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7
Breakage of anisometric rod-shaped particles
Autor: Marek C. Ruzicka, Miroslav Puncochar, Lukáš Kulaviak, P. Zamostny, Vera Penkavova
Publikováno v: Particulate Science and Technology. 36:432-437
In this experimental study, behavior of dry granular layers of monodisperse cylindrical particles (8 × 1 mm) under uniaxial compression in piston die arrangement was investigated. The layer compressibility and particle size distribution (PSD) were m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::033311f4d858787c1b92a6b87491f151
https://doi.org/10.1080/02726351.2017.1347969
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8
Microfluidic chip reactor and the stereoselective hydrogenation of methylacetoacetate over (R) -Ru-BINAP in the [N 8222 ][Tf 2 N]/methanol/water mixed phase
Autor: Magdalena Bendová, Petr Kluson, Hana Vychodilova, Stanislav Hejda, Vera Penkavova, Petr Stavarek
Publikováno v: Chemical Engineering and Processing: Process Intensification. 115:39-45
Homogeneous asymmetric catalysts represented by organometallics of transition elements reveal very high activity and stereoselectivity in asymmetric hydrogenation of β-ketoesters. Recently, it appeared efficient to use ionic liquids of the [NR222][T
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8dd07ceafca9fdc20cbd3f30ac3615b
https://doi.org/10.1016/j.cep.2017.02.002
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9
Molecular structure effects of [NR,222][Tf2N] ionic liquids on their flow properties in the microfluidic chip reactor—a complete validation study
Autor: Magdalena Bendová, Petr Stavarek, Hana Vychodilova, Stanislav Hejda, Vera Penkavova, Petr Kluson, Dalibor Vlcek
Publikováno v: Chemical Engineering and Processing: Process Intensification. 111:57-66
N-alkyl-triethylammonium bis(trifluoromethanesulfonyl)imides ([N R,222 ][Tf 2 N]) ionic liquids (different in the length of their alkyl chain) are well suited for accommodating chiral catalytic organometallics in stereoselective hydrogenation reactio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::58b248ca4003e34b548fc7a2ed936fbd
https://doi.org/10.1016/j.cep.2016.11.004
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