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6篇 您的检索式:作者名="Jan Valenta"
    题名 作者 年代 出处 被引量
1Fatty acid modification of Wnt1 and Wnt3a at serine is prerequisite for lipidation at cysteine and is essential for Wnt signalling显示文摘Lenka Doubravska Michaela Krausova Dietmar Gradl Martina Vojtechova Lucie Tumova Jan Lukas Tomas Valenta Vendula Pospichalova Bohumil Fafilek Jiri Plachy Ondrej Sebesta Vladimir Korinek 2011Cellular Signalling2011,,5:1
2Fatty acid modification of Wnt1 and Wnt3a at serine is prerequisite for lipidation at cysteine and is essential for Wnt signalling显示文摘Lenka Doubravska Michaela Krausova Dietmar Gradl Martina Vojtechova Lucie Tumova Jan Lukas Tomas Valenta Vendula Pospichalova Bohumil Fafilek Jiri Plachy Ondrej Sebesta Vladimir Korinek 2011Cellular Signalling2011,,5:1
3Effectiveness of transoral laser microsurgery for precancerous lesions and early glottic cancer guided by analysis of voice quality显示文摘Abdulrahman Ali Bahannan Ale? Slaví?ek Libor ?erny Jan Vok?al Zdenek Valenta Radka Lohynska Martin Chovanec Jan Betka 2014Head Neck2014,,:1
4EUROPEAN REGULATION OF INSOLVENCY STATUS IN THE HYBRID PROCEEDING显示文摘Tomas Moravec Jan Pastorcak Petr Valenta 2015US-China Law Review2015,12,5:0
5Bright trions in direct-bandgap silicon nanocrystals revealed by low-temperature single-nanocrystal spectroscopy显示文摘Strain-engineered silicon nanocrystals(SiNCs)have recently been shown to possess direct bandgap.Here,we report the observation of a rich structure in the single-nanocrystal photoluminescence spectra of strain-engineered direct-bandgap SiNCs in the temperature range of 9–300 K.The relationship between individual types of spectra is discussed,and the numerical modeling of spectral diffusion of the experimentally acquired spectra reveals a common origin for most types.The intrinsic spectral shape is shown to be a structure that contains three peaks,approximately 150 meV apart,each of which possesses a Si phonon substructure.Narrow spectral lines,reaching ≤ meV at 20 K,are detected.The observed temperature dependence of the spectral structure can be assigned to the radiative recombination of positively charged trions,in contrast to several previous reports linking a very similar shape to phonons in the surface capping layers.Our result serves as strong additional support for the direct-bandgap nature of the investigated SiNCs.Katerina Kusova Ivan Pelant Jan Valenta 2015Light(Science & Applications)2015,4,1:0
6Thermally stimulated exciton emission in Si nanocrystals显示文摘Increasing temperature is known to quench the excitonic emission of bulk silicon,which is due to thermally induced dissociation of excitons.Here,we demonstrate that the effect of temperature on the excitonic emission is reversed for quantumconfined silicon nanocrystals.Using laser-induced heating of silicon nanocrystals embedded in SiO2,we achieved a more than threefold(4300%)increase in the radiative(photon)emission rate.We theoretically modeled the observed enhancement in terms of the thermally stimulated effect,taking into account the massive phonon production under intense illumination.These results elucidate one more important advantage of silicon nanostructures,illustrating that their optical properties can be influenced by temperature.They also provide an important insight into the mechanisms of energy conversion and dissipation in ensembles of silicon nanocrystals in solid matrices.In practice,the radiative rate enhancement under strong continuous wave optical pumping is relevant for the possible application of silicon nanocrystals for spectral conversion layers in concentrator photovoltaics.Elinore MLD de Jong Huub Rutjes Jan Valenta M Tuan Trinh Alexander N Poddubny Irina N Yassievich Antonio Capretti Tom Gregorkiewicz 2017Light(Science & Applications)2017,6,1:0
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