Institution
Academy of Sciences of the Czech Republic
Government•Prague, Czechia•
About: Academy of Sciences of the Czech Republic is a government organization based out in Prague, Czechia. It is known for research contribution in the topics: Population & Catalysis. The organization has 27866 authors who have published 71021 publications receiving 1821686 citations.
Topics: Population, Catalysis, Thin film, Laser, Ion
Papers published on a yearly basis
Papers
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TL;DR: In this article, a model based on the assumption of plug flow of supercritical solvent through a fixed bed of milled material was developed for both extraction periods and a new model with analytical solution was developed on the basis of these models.
553 citations
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TL;DR: The Advanced Telescope for High Energy Astrophysics (Athena+) mission as discussed by the authors provides the necessary performance (e.g., angular resolution, spectral resolution, survey grasp) to address these questions and revolutionize our understanding of the Hot and Energetic Universe.
Abstract: This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of two key questions in astrophysics: 1) How does ordinary matter assemble into the large scale structures that we see today? 2) How do black holes grow and shape the Universe? Hot gas in clusters, groups and the intergalactic medium dominates the baryonic content of the local Universe. To understand the astrophysical processes responsible for the formation and assembly of these large structures, it is necessary to measure their physical properties and evolution. This requires spatially resolved X-ray spectroscopy with a factor 10 increase in both telescope throughput and spatial resolving power compared to currently planned facilities. Feedback from supermassive black holes is an essential ingredient in this process and in most galaxy evolution models, but it is not well understood. X-ray observations can uniquely reveal the mechanisms launching winds close to black holes and determine the coupling of the energy and matter flows on larger scales. Due to the effects of feedback, a complete understanding of galaxy evolution requires knowledge of the obscured growth of supermassive black holes through cosmic time, out to the redshifts where the first galaxies form. X-ray emission is the most reliable way to reveal accreting black holes, but deep survey speed must improve by a factor ~100 over current facilities to perform a full census into the early Universe. The Advanced Telescope for High Energy Astrophysics (Athena+) mission provides the necessary performance (e.g. angular resolution, spectral resolution, survey grasp) to address these questions and revolutionize our understanding of the Hot and Energetic Universe. These capabilities will also provide a powerful observatory to be used in all areas of astrophysics.
552 citations
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TL;DR: This paper showed that tumor cells without mitochondrial DNA (mtDNA) showed delayed tumor growth, and that tumor formation is associated with acquisition of mtDNA from host cells, leading to partial recovery of mitochondrial function in cells derived from primary tumors grown from cells without mtDNA and a shorter lag in tumor growth.
548 citations
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Bergen University College1, University of Bergen2, Aligarh Muslim University3, Gangneung–Wonju National University4, Korea Institute of Science and Technology Information5, COMSATS Institute of Information Technology6, University of Oslo7, Lawrence Livermore National Laboratory8, Czech Technical University in Prague9, Academy of Sciences of the Czech Republic10, Yale University11, Panjab University, Chandigarh12, CERN13, Hungarian Academy of Sciences14, University of Bologna15, Goethe University Frankfurt16, Variable Energy Cyclotron Centre17, GSI Helmholtz Centre for Heavy Ion Research18, Kurchatov Institute19
TL;DR: In this paper, the ALICE detector was used to measure the correlations between charged trigger and associated particles in p-Pb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5 < P-T, P-assoc < P -T,Ptrig < 4 GeV/c.
548 citations
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TL;DR: The findings support a central function of cytokinin in regulating reproductive meristems and highlight the relevance of sink strength in determining yield in Arabidopsis thaliana.
Abstract: The size and activity of the shoot apical meristem is regulated by transcription factors and low molecular mass signals, including the plant hormone cytokinin. The cytokinin status of the meristem depends on different factors, including metabolic degradation of the hormone, which is catalyzed by cytokinin oxidase/dehydrogenase (CKX) enzymes. Here, we show that CKX3 and CKX5 regulate the activity of the reproductive meristems of Arabidopsis thaliana. CKX3 is expressed in the central WUSCHEL (WUS) domain, while CKX5 shows a broader meristematic expression. ckx3 ckx5 double mutants form larger inflorescence and floral meristems. An increased size of the WUS domain and enhanced primordia formation indicate a dual function for cytokinin in defining the stem cell niche and delaying cellular differentiation. Consistent with this, mutation of a negative regulator gene of cytokinin signaling, ARABIDOPSIS HISTIDINE PHOSPHOTRANSFER PROTEIN 6, which is expressed at the meristem flanks, caused a further delay of differentiation. Terminal cellular differentiation was also retarded in ckx3 ckx5 flowers, which formed more cells and became larger, corroborating the role of cytokinin in regulating flower organ size. Furthermore, higher activity of the ckx3 ckx5 placenta tissue established supernumerary ovules leading to an increased seed set per silique. Together, the results underpin the important role of cytokinin in reproductive development. The increased cytokinin content caused an ~55% increase in seed yield, highlighting the relevance of sink strength as a yield factor.
546 citations
Authors
Showing all 27986 results
Name | H-index | Papers | Citations |
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Michael Grätzel | 248 | 1423 | 303599 |
Richard E. Smalley | 153 | 494 | 111117 |
Mercouri G. Kanatzidis | 152 | 1854 | 113022 |
Jovan Milosevic | 152 | 1433 | 106802 |
Rajesh Kumar | 149 | 4439 | 140830 |
Vaclav Vrba | 141 | 1298 | 95671 |
Milos Lokajicek | 139 | 1511 | 98888 |
Rupert Leitner | 136 | 1201 | 90597 |
Christophe Royon | 134 | 1453 | 90249 |
Tetiana Hryn'ova | 131 | 1059 | 84260 |
G. T. Jones | 131 | 864 | 75491 |
Peter Kodys | 131 | 1262 | 85267 |
Mohammad Khaja Nazeeruddin | 129 | 646 | 85630 |
Alexander Kupco | 129 | 1230 | 86436 |
Ning Zhou | 129 | 996 | 80094 |