Institution
Kyushu University
Education•Fukuoka, Japan•
About: Kyushu University is a education organization based out in Fukuoka, Japan. It is known for research contribution in the topics: Population & Catalysis. The organization has 68284 authors who have published 135190 publications receiving 3055928 citations. The organization is also known as: Kyūshū Daigaku.
Topics: Population, Catalysis, Cancer, Hydrogen, Transplantation
Papers published on a yearly basis
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TL;DR: This model, which suggests that atherosclerotic changes may be one of the primary factors in the occurrence of coronary artery spasm, should facilitate studies on the pathogenesis of this condition.
Abstract: Angiographically demonstrable coronary artery spasm could be provoked repeatedly by giving intracoronary or intravenous injections of histamine to miniature swine with experimentally induced atherosclerotic lesions of the coronary artery. The spasm induced in this way subsided either spontaneously or after the administration of nitroglycerin and was prevented by a calcium antagonist or an agent that blocks histamine H1 receptors. This model, which suggests that atherosclerotic changes may be one of the primary factors in the occurrence of coronary artery spasm, should facilitate studies on the pathogenesis of this condition.
356 citations
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TL;DR: The data suggest that p27 proteolysis is necessary for the activation of not only Cdk2 but also Cdc2, and that Skp2 contributes to regulation of G(2)-M progression by mediating the degradation of p27.
356 citations
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TL;DR: It is suggested that, in the coding regions surrounding the splicing points of intervening sequences ofβ-globin genes, there exist rigid secondary structures that show the slowing down of evolutionary rates of both synonymous and amino acid substitutions in the primate line.
Abstract: A method for estimating the evolutionary rates of synonymous and amino acid substitutions from homologous nucleotide sequences is presented. This method is applied to genes of oX174 and G4 genomes, histone genes andβ-globin genes, for which homologous nucleotide sequences are available for comparison to be made. It is shown that the rates of synonymous substitutions are quite uniform among the non-overlapping genes of oX174 and G4 and among histone genes H4, H2B, H3 and H2A. A comparison between oX174 and G4 reveals that, in the overlapping segments of the A-gene, the rate of synonymous substitution is reduced more significantly than the rate of amino acid substitution relative to the corresponding rate in the nonoverlapping segment. It is also suggested that, in the coding regions surrounding the splicing points of intervening sequences ofβ-globin genes, there exist rigid secondary structures. It is in only these regions that theβ-globin genes show the slowing down of evolutionary rates of both synonymous and amino acid substitutions in the primate line.
356 citations
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355 citations
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Columbia University1, Goddard Institute for Space Studies2, University of Crete3, Foundation for Research & Technology – Hellas4, Carnegie Mellon University5, University of São Paulo6, University of California, San Diego7, University of Reading8, Met Office9, European Centre for Medium-Range Weather Forecasts10, Finnish Meteorological Institute11, University of Oslo12, North-West University13, University of Maryland, College Park14, University of Leeds15, Goddard Space Flight Center16, University of L'Aquila17, Universities Space Research Association18, Pacific Northwest National Laboratory19, Meteorological Service of Canada20, National Center for Atmospheric Research21, Swiss Federal Institute for Forest, Snow and Landscape Research22, Paul Scherrer Institute23, Norwegian Meteorological Institute24, University of Colorado Boulder25, Max Planck Society26, University of Michigan27, University of Wyoming28, State University of New York System29, Environment Canada30, Belgian Institute for Space Aeronomy31, Georgia Institute of Technology32, Istanbul Technical University33, Duke University34, Kyushu University35, University of Eastern Finland36, University of Mainz37, Royal Netherlands Meteorological Institute38, China Meteorological Administration39, University of California, Davis40
TL;DR: In this article, the current status of global modeling of the organic aerosol (OA) in the troposphere and analyzes the differences between models as well as between models and observations.
Abstract: . This paper evaluates the current status of global modeling of the organic aerosol (OA) in the troposphere and analyzes the differences between models as well as between models and observations. Thirty-one global chemistry transport models (CTMs) and general circulation models (GCMs) have participated in this intercomparison, in the framework of AeroCom phase II. The simulation of OA varies greatly between models in terms of the magnitude of primary emissions, secondary OA (SOA) formation, the number of OA species used (2 to 62), the complexity of OA parameterizations (gas-particle partitioning, chemical aging, multiphase chemistry, aerosol microphysics), and the OA physical, chemical and optical properties. The diversity of the global OA simulation results has increased since earlier AeroCom experiments, mainly due to the increasing complexity of the SOA parameterization in models, and the implementation of new, highly uncertain, OA sources. Diversity of over one order of magnitude exists in the modeled vertical distribution of OA concentrations that deserves a dedicated future study. Furthermore, although the OA / OC ratio depends on OA sources and atmospheric processing, and is important for model evaluation against OA and OC observations, it is resolved only by a few global models. The median global primary OA (POA) source strength is 56 Tg a−1 (range 34–144 Tg a−1) and the median SOA source strength (natural and anthropogenic) is 19 Tg a−1 (range 13–121 Tg a−1). Among the models that take into account the semi-volatile SOA nature, the median source is calculated to be 51 Tg a−1 (range 16–121 Tg a−1), much larger than the median value of the models that calculate SOA in a more simplistic way (19 Tg a−1; range 13–20 Tg a−1, with one model at 37 Tg a−1). The median atmospheric burden of OA is 1.4 Tg (24 models in the range of 0.6–2.0 Tg and 4 between 2.0 and 3.8 Tg), with a median OA lifetime of 5.4 days (range 3.8–9.6 days). In models that reported both OA and sulfate burdens, the median value of the OA/sulfate burden ratio is calculated to be 0.77; 13 models calculate a ratio lower than 1, and 9 models higher than 1. For 26 models that reported OA deposition fluxes, the median wet removal is 70 Tg a−1 (range 28–209 Tg a−1), which is on average 85% of the total OA deposition. Fine aerosol organic carbon (OC) and OA observations from continuous monitoring networks and individual field campaigns have been used for model evaluation. At urban locations, the model–observation comparison indicates missing knowledge on anthropogenic OA sources, both strength and seasonality. The combined model–measurements analysis suggests the existence of increased OA levels during summer due to biogenic SOA formation over large areas of the USA that can be of the same order of magnitude as the POA, even at urban locations, and contribute to the measured urban seasonal pattern. Global models are able to simulate the high secondary character of OA observed in the atmosphere as a result of SOA formation and POA aging, although the amount of OA present in the atmosphere remains largely underestimated, with a mean normalized bias (MNB) equal to −0.62 (−0.51) based on the comparison against OC (OA) urban data of all models at the surface, −0.15 (+0.51) when compared with remote measurements, and −0.30 for marine locations with OC data. The mean temporal correlations across all stations are low when compared with OC (OA) measurements: 0.47 (0.52) for urban stations, 0.39 (0.37) for remote stations, and 0.25 for marine stations with OC data. The combination of high (negative) MNB and higher correlation at urban stations when compared with the low MNB and lower correlation at remote sites suggests that knowledge about the processes that govern aerosol processing, transport and removal, on top of their sources, is important at the remote stations. There is no clear change in model skill with increasing model complexity with regard to OC or OA mass concentration. However, the complexity is needed in models in order to distinguish between anthropogenic and natural OA as needed for climate mitigation, and to calculate the impact of OA on climate accurately.
355 citations
Authors
Showing all 68546 results
Name | H-index | Papers | Citations |
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Tony Hunter | 175 | 593 | 124726 |
Stanley B. Prusiner | 168 | 745 | 97528 |
Yang Yang | 164 | 2704 | 144071 |
Stephen J. Elledge | 162 | 406 | 112878 |
Takashi Taniguchi | 152 | 2141 | 110658 |
Andrew White | 149 | 1494 | 113874 |
Junji Tojo | 135 | 878 | 84615 |
Claude Leroy | 135 | 1170 | 88604 |
Georges Azuelos | 134 | 1294 | 90690 |
Susumu Oda | 133 | 981 | 80832 |
Lucie Gauthier | 132 | 679 | 64794 |
Hiroshi Sakamoto | 131 | 1250 | 85363 |
Frank Caruso | 131 | 641 | 61748 |
Kiyotomo Kawagoe | 131 | 1406 | 90819 |
Kozo Kaibuchi | 129 | 493 | 60461 |