Institution
Kōchi University
Education•Kochi, Japan•
About: Kōchi University is a education organization based out in Kochi, Japan. It is known for research contribution in the topics: Population & Zircon. The organization has 5314 authors who have published 10056 publications receiving 204869 citations. The organization is also known as: Kōchi Daigaku.
Topics: Population, Zircon, Metamorphism, Hydrothermal circulation, Craton
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the reaction of epoxides with nitrogen heterocycles such as indoles, pyrroles, imidazoles, and pyrazoles was studied under both high-pressure and silica gel-catalyzed conditions.
Abstract: The reaction of epoxides with nitrogen heterocycles such as indoles, pyrroles, imidazoles, and pyrazoles was studied under both high-pressure and silica gel-catalyzed conditions. Whereas it has been reported that the treatment of indole with styrene oxide at 10 kbar and 42 °C for 24 h gave 2-(3-indolyl)-2-phenylethanol in 56% yield, the same compound was obtained in 88% yield when the reaction was conducted on silica gel at rt for 1 week. Similarly, efficient reaction of epoxides with pyrroles, imidazoles, and pyrazoles was achieved. In terms of stereochemical features, the epoxide ring opening reaction of (R)-(+)-styrene oxide with indole was found to proceed stereoselectively in an SN2 fashion at the benzyl carbon, in either case.
99 citations
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TL;DR: The Abushan volcanic rocks are composed mainly of andesites and trachy-andesites, and the geochemical features and ages of the volcanic rocks relate them with post-collisional setting as discussed by the authors.
99 citations
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TL;DR: This new approach resulted in a new class of supramolecular polymers consisting of a 1,3,5-trisubstituted benzene derivative, numbers of which were linearly linked by hydrogen bonds and stacked benzene derivatives.
Abstract: A novel, highly selective photocyclic aromatization (SCAT) of π-conjugated polymers from phenylacetylene having two hydroxyl groups to exclusively yield a 1,3,5-trisubstituted benzene derivative was developed, and its success was confirmed by (1)H NMR, GPC, and TOF-MS. The SCAT reaction has many unique characteristics. (1) It is a quantitative reaction: it gave only the corresponding cyclic trimer, i.e., a 1,3,5-trisubstituted benzene derivative, quantitatively (100%). No byproducts were produced under the best conditions. (2) It is an intramolecular reaction: it occurred between three adjacent monomer units in one macromolecule. (3) It is a stereospecific and topochemical or template reaction: the reactivity strongly depended on the configuration and conformation of the starting polymer substrates. (4) It is a photoreaction: high selectivity (100%) was observed only by the use of visible light irradiation, not by heating. (5) It is a solid-state reaction: high selectivity (100%) was observed only in the solid state, not in solution. In addition, (6) the resulting cyclic trimers could form a self-supporting membrane, despite their low molecular weights. This new approach resulted in a new class of supramolecular polymers consisting of a 1,3,5-trisubstituted benzene derivative, numbers of which were linearly linked by hydrogen bonds and stacked benzene derivatives. Since SCAT has such high selectivities and is useful for the preparation of a self-supporting supramolecular polymer membrane, many applications can be expected.
99 citations
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National Institute of Water and Atmospheric Research1, GNS Science2, Pennsylvania State University3, Imperial College London4, New Mexico Institute of Mining and Technology5, Cardiff University6, University of California, Santa Cruz7, Brown University8, Rice University9, Texas A&M University10, Kōchi University11, Universidade do Vale do Rio dos Sinos12, National Institute of Advanced Industrial Science and Technology13, University of Leeds14, Oregon State University15, Hohai University16, University of Lorraine17, Commonwealth Scientific and Industrial Research Organisation18, Ohio State University19, Colorado School of Mines20, Cornell University21, Instituto Português do Mar e da Atmosfera22, Japan Agency for Marine-Earth Science and Technology23, University of Texas at Austin24, University of Bremen25, Kyoto University26, Guilin University of Technology27, Shanghai Ocean University28, University of Montpellier29, University of Hawaii at Manoa30, University of Liverpool31, University of Oxford32, University of Florida33, Banaras Hindu University34, University of Washington35, Chinese Academy of Sciences36, University of Auckland37
TL;DR: Observations suggest that SSEs and associated slow earthquake phenomena are promoted by lithological, mechanical, and frictional heterogeneity within the fault zone, enhanced by geometric complexity associated with subduction of rough crust.
Abstract: Slow slip events (SSEs) accommodate a significant proportion of tectonic plate motion at subduction zones, yet little is known about the faults that actually host them. The shallow depth (<2 km) of well-documented SSEs at the Hikurangi subduction zone offshore New Zealand offers a unique opportunity to link geophysical imaging of the subduction zone with direct access to incoming material that represents the megathrust fault rocks hosting slow slip. Two recent International Ocean Discovery Program Expeditions sampled this incoming material before it is entrained immediately down-dip along the shallow plate interface. Drilling results, tied to regional seismic reflection images, reveal heterogeneous lithologies with highly variable physical properties entering the SSE source region. These observations suggest that SSEs and associated slow earthquake phenomena are promoted by lithological, mechanical, and frictional heterogeneity within the fault zone, enhanced by geometric complexity associated with subduction of rough crust.
98 citations
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TL;DR: The knowledge presently accumulated about the structures of these proteins suggests that there may be three distinct origins a � ‘universal globin’, a ‘compact glob in’ and an ‘IDO-like globIn’.
Abstract: The distribution, physiological function, amino acid sequence and gene structure of myoglobin and myoglobin-like proteins from various taxa are summarized, and their evolution is discussed. Although it has long been thought that all haemoglobins and myoglobins have evolved from a common ancestral gene, the knowledge presently accumulated about the structures of these proteins suggests that there may be three distinct origins a ‘universal globin’, a ‘compact globin’ and an ‘IDO-like globin’.
98 citations
Authors
Showing all 5332 results
Name | H-index | Papers | Citations |
---|---|---|---|
Shizuo Akira | 261 | 1308 | 320561 |
Christopher Gillberg | 131 | 754 | 67561 |
William J. McKenna | 130 | 528 | 67381 |
Kiyoshi Takeda | 129 | 416 | 109817 |
M. Santosh | 103 | 1344 | 49846 |
Motoharu Seiki | 100 | 348 | 35345 |
H. Phillip Koeffler | 92 | 479 | 29428 |
Jonathan F. Ormes | 89 | 306 | 27022 |
George R. Pettit | 89 | 848 | 31759 |
Christos C. Zouboulis | 88 | 689 | 27614 |
Haibo Zhang | 65 | 422 | 16831 |
Alan M. Bond | 64 | 927 | 23656 |
Motoo Shiro | 64 | 720 | 17786 |
Shun-Ichi Murahashi | 62 | 439 | 14117 |
Eric S. Daar | 62 | 236 | 14205 |