著者

平林 佳

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.60, no.4, pp.165-166, 2018-08-31 (Released:2018-08-31)

参考文献数

11

著者

江上 毅

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.62, no.4, pp.243-247, 2020-12-22 (Released:2020-12-26)

参考文献数

29

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In the last 100 years the field of crystallography made enormous contributions to condensed matter physics and materials science through determining the atomic structure of crystalline and non-crystalline materials including liquids by diffraction measurement. However, in modern times as the attention shifts from the static structure to dynamic structure crystallography should respond to this change. In particular, because liquid is intrinsically dynamic the definition of its structure ought to include dynamics. In this article I discuss how the crystallographic approach can be widened to include dynamics, focusing on liquids and related soft-matter.

著者

宮原 義一

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.38, no.3, pp.249-253, 1996-06-30 (Released:2010-09-30)

参考文献数

4

著者

尾関 智二

出版者

The Crystallographic Society of Japan

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.43, no.6, pp.391-398, 2001-12-31 (Released:2010-09-30)

参考文献数

7

著者

門馬 綱一

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.56, no.3, pp.173-178, 2014-06-30 (Released:2014-07-09)

参考文献数

33

被引用文献数

1

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Features of the three-dimensional (3D) visualization software VESTA and a program for maximum entropy method (MEM) analysis Dysnomia are reviewed. VESTA has a unique feature to simultaneously visualize crystal, volumetric and morphology data. Multiple numbers of crystal structure data can be overlaid and compared in the same 3D space. Two examples of how these features are utilized in the X-ray crystallographic study are presented. In Dysnomia, several new features are implemented for improvement of the results of MEM analysis and better performance of calculation. New features in the latest version of VESTA are also explained, and some thoughts on the future of crystallographic visualization software are discussed.

著者

宮脇 律郎

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.53, no.1, pp.58-63, 2011-02-28 (Released:2011-04-01)

参考文献数

14

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A mineral substance is defined as a naturally occurring solid that has been formed by geological processes, either on earth or in extraterrestrial bodies by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (CNMMC-IMA). A mineral species is defined with the chemical composition and crystallographic properties. So far approximate 4,300 mineral species have been endorsed and approved by the CNMMC-IMA. The crystal structure is the fundamental key of the crystallography in the description of mineral. Owing to the recent developments in the hardware and software for crystal structure analysis, many of new mineral species have been described with data of crystal structures. Minor differences in atomic arrangement such as chemical orderings provide the information on the genesis of mineral.

著者

箕浦 真生

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.57, no.5, pp.269-275, 2015-10-31 (Released:2015-10-31)

参考文献数

16

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In this tutorial course of SHELXL, we will focus on how to treat the twinning by merohedry. Merohedral twinning is not apparent during the measurement or in the diffraction pattern, and therefore, unsolved twinning and fuzzy molecular structures remain in the data folder. We would like to show the avoidable pitfalls that are to be considered for the correct molecular structures using examples of solved merohedral twin crystals and step by step tutorials for organ(ometall)ic chemists.

著者

北所 健悟 西村 昂亮 神谷 重樹 堀口 安彦

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.55, no.3, pp.223-229, 2013-06-30 (Released:2013-07-02)

参考文献数

38

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Clostridium perfringens enterotoxin(CPE)is a cause of food poisoning and is considered a pore-forming toxin which damages target cells by disrupting the selective permeability of the plasma membrane. We determined the crystal structure of the full-length CPE at 2.0 Å. The overall structure of CPE displays an elongated shape, composed of three distinct domains, D1, D2, and D3. In this structure, the pore-forming domain(Val81〜Ile106)of CPE has alternating pattern of polar and hydrophobic residues and forms α-helix. This characteristic sequence is frequently observed in β pore-forming toxin families as typified by α-hemolysin. These results indicate that CPE behaves as β pore-forming toxins.

著者

中井 泉 植草 秀裕

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.61, no.3, pp.187-188, 2019-08-31 (Released:2019-08-31)

著者

高田 昌樹

出版者

The Crystallographic Society of Japan

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.54, no.5, 2012

著者

蓮 精 嘉村 茂邦

出版者

The Crystallographic Society of Japan

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.23, no.3, pp.217-226, 1981-05-30 (Released:2010-09-30)

参考文献数

8

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A gem opal consists of monodisperse colloidal spheres of silica being arranged in orderly arrays. This must have been formed in the geological past from a colloidal suspension of silica and then be desicated. The formation process from the suspension would be a sort of the phase transition from a disordered to an ordered state which is seen in a monodisperse latex. This transition is characterized by a repulsive interaction between the particles, and recently identified as Kirkwood-Alder transition that is considered to be an essence of the liquid-solid transition.The opal structure is the same as that in monodisperse latexes which can be seen under a light microscope. It is interesting that such structures reflect some aspects of the atomic structure in crystals. There are sometimes found, in multicomponent opals, superstructures such as AlB2-and CaZn13-type and these are also found in binary mixtures of monodisperse latexes.Now colloid science is opening a new aspect in the investigation of the structure of alloys and some compounds.

著者

宮原 郁子 五十嵐 教之 田中 信忠 栗栖 源嗣

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.56, no.4, pp.223, 2014-08-31 (Released:2014-09-03)

著者

三宅 静雄 岡 邦雄

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.4, no.1, pp.31-36, 1962-06-25 (Released:2010-09-30)

著者

中村 顕 平林 佳 田之倉 優

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.59, no.4, pp.182-187, 2017-08-31 (Released:2017-08-31)

参考文献数

23

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Microgravity environment has been used to obtain high-quality crystals. Strong magnetic force produced by a superconducting magnet can cancel out the gravity force, enabling construction of quasi-microgravity environment on earth. We developed a protein crystallization system which is composed of a superconducting magnet for the magnetic force-based quasi-microgravity and an inverted periscope for in situ observation of crystal growth. Crystals grown in the system showed improved and homogeneous quality.

著者

高橋 靖彦

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.44, no.Supplement, pp.7-7, 2002-12-11 (Released:2010-09-30)

参考文献数

7

著者

高橋 靖彦

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.45, no.2, pp.110-118, 2003-04-30 (Released:2010-09-30)

参考文献数

42

被引用文献数

1 1

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Crystal structures and electron density distributions of some manganese and cobalt oxide materials have been studied by the maximum entropy method using single-crystal X-ray diffraction data measured at room temperature. The nature of chemical bonding in these oxides is understood from the present structural and electron density analyses. The features of electron density distribution obtained theoretically by FLAPW calculations for these oxides were in good agreement with the present experimental observations.

著者

片岡 邦光

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.54, no.Supplement, pp.s5-s6, 2012-10-25 (Released:2012-12-01)

著者

小川 桂一郎

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.38, no.6, pp.363-377, 1996-12-30 (Released:2010-09-30)

参考文献数

5

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How to create and use CIF, which is required for submission of papers having the results of crystallographic structure analysis, is illustrated.

著者

石沢 伸夫

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.42, no.5, pp.459-461, 2000-10-31 (Released:2010-09-30)

参考文献数

6

著者

岩崎 憲治

出版者

日本結晶学会

雑誌

日本結晶学会誌 (ISSN:03694585)

巻号頁・発行日

vol.57, no.1, pp.66-71, 2015-02-28 (Released:2015-03-05)

参考文献数

24

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Recent advances that improve direct electron detectors have revolutionized structural determination of biological molecules by cryo-electron microscopy. It has brought about the advent of near atomic resolution in single-particle reconstruction even with membrane proteins of 200~400 kDa. In fact, such high-resolution structures have allowed de novo building of atomic models. This rapid progress will change the quality and quantity of the conventional hybrid approach combining cryo-electron microscopy and X-ray crystallography or light microscopy, and computational methods such as molecular dynamics will also take on added significance to create integrated models of huge and complex macromolecules.