1,106 research outputs found
East-West Center Oral History Project : Kenji Sumida
No full textInterviewed by Phyllis Tabusa, July 31, 2007 in Honolulu, Hawaii.For more about the East-West Center, see https://www.eastwestcenter.org/Kenji Sumida served as President of the East-West Center from 1995 to 1997. Appointed by the Board of Governors upon the departure of President Michel Oksenberg, Sumida shepherded EWC through a 50% reduction-in-force when Congress reduced the budget from 10 million. By 1997, Sumida and his management team had reduced fixed costs to within the bounds of the $14 million Congressional allotment for that year. During his tenure Sumida also worked to raise Congress's awareness of Center resources and to re-energize the Center's relationship with its alumni.Click on the PDFs to read more. Includes photograph, interview quotes, and the full interview narrative
Probing hydration dynamics of metal-organic frameworks by broadband THz pulses
No full textPaper SF1F.1We probe porous metal-organic framework materials (MOFs) using broadband terahertz (THz) pulses. Water molecules that are absorbed by the pores of the material display intermolecular dynamics differing from those of free water.Christian Wolpert, Kenji Sumida, François Blanchard, Koichiro Tanak
Carbon Dioxide Capture in Metal–Organic Frameworks
No full textAbstract not availableKenji Sumida, David L. Rogow, Jarad A. Mason, Thomas M. McDonald, Eric D. Bloch, Zoey R. Herm, Tae-Hyun Bae, Jeffrey R. Lon
O
No full textDespite the large number of metal–organic frameworks that have been studied in the context of post-combustion carbon capture, adsorption equilibria of gas mixtures including CO₂, N₂, and H₂O, which are the three biggest components of the flue gas emanating from a coal- or natural gas-fired power plant, have never been reported. Here, we disclose the design and validation of a high-throughput multicomponent adsorption instrument that can measure equilibrium adsorption isotherms for mixtures of gases at conditions that are representative of an actual flue gas from a power plant. This instrument is used to study 15 different metal–organic frameworks, zeolites, mesoporous silicas, and activated carbons representative of the broad range of solid adsorbents that have received attention for CO₂ capture. While the multicomponent results presented in this work provide many interesting fundamental insights, only adsorbents functionalized with alkylamines are shown to have any significant CO₂ capacity in the presence of N₂ and H₂O at equilibrium partial pressures similar to those expected in a carbon capture process. Most significantly, the amine-appended metal organic framework mmen-Mg₂(dobpdc) (mmen = N,N′-dimethylethylenediamine, dobpdc ⁴⁻ = 4,4′-dioxido-3,3′-biphenyldicarboxylate) exhibits a record CO₂ capacity of 4.2 ± 0.2 mmol/g (16 wt %) at 0.1 bar and 40 °C in the presence of a high partial pressure of H₂O.Jarad A. Mason, Thomas M. McDonald, Tae-Hyun Bae, Jonathan E. Bachman, Kenji Sumida, Justin J. Dutton, Steven S. Kaye and Jeffrey R. Lon
HASTE DE LÍRIOS, DE KENJI MIYAZAWA
No full textThe present work is a translation from Japanese to Brazilian Portuguese of the Yomata no Yuri (Stem of Lillies) tale written by the Japanese author Kenji Miyazawa (1893-1933). Miyazawa was an essayist, poet and writer of Japanese children's tales. Even though his work is not so popular in Brazil, in Japan it has achieved much notoriety. He is considered one of the most relevant writers in both prose and poetry. Miyazawa was born in Iwate and graduated in Agricultural Sciences. He was also a professor and dedicated himself fundamentally to the writing career. His work is notably influenced by Nichiren Buddhism, which can be seen in the following work. This translation aims at presenting to the Brazilian public an example of the Kenji’s literature, considering the cultural relevance of his work and the importance for understanding the Japanese way of thinking.O presente trabalho é uma tradução para o português do Brasil do conto Yomata no Yuri (Haste de Lírios) do autor japonês Kenji Miyazawa (1893 – 1933). Miyazawa foi ensaísta, poeta e escritor de contos japoneses infantis. Embora a obra dele não seja tão conhecida no Brasil, no Japão ela alcançou bastante notoriedade, podendo ser considerado um dos escritores mais relevantes tanto na prosa, quanto na poesia. Miyazawa nasceu na prefeitura de Iwate, graduou-se em Ciências da Agricultura, foi professor universitário e dedicou-se fundamentalmente à carreira de escritor. Sua obra apresenta forte influência do Budismo Nichiren, como pode ser visto pela leitura do conto a seguir. Esta tradução visa a apresentar ao público brasileiro um exemplo da literatura de Kenji, tendo em vista a riqueza cultural de seu trabalho, bem como relevância para o entendimento do pensamento japonês
Ex situ NMR relaxometry of metal-organic frameworks for rapid surface-area screening
No full textTaking a relaxed approach: The NMR relaxation behavior of imbibed solvent has been used to estimate the surface area of a variety of microporous metal-organic frameworks and zeolites. This NMR technique is amenable to automation and can expedite the characterization of microporous materials by identifying any nonporous or low-surface-area structures. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Joseph J. Chen, Xueqian Kong, Kenji Sumida, Mary Anne Manumpil, Jeffrey R. Long and Jeffrey A. Reime
Evaluation of cation-exchanged zeolite adsorbents for post-combustion carbon dioxide capture
No full textA series of zeolite adsorbents has been evaluated for potential application in post-combustion CO₂ capture using a new high-throughput gas adsorption instrument capable of measuring 28 samples in parallel. Among the zeolites tested, Ca-A exhibits the highest CO₂ uptake (3.72 mmol g⁻¹ and 5.63 mmol cm⁻³) together with an excellent CO₂ selectivity over N₂ under conditions relevant to capture from the dry flue gas stream of a coal-fired power plant. The large initial isosteric heat of adsorption of −58 kJ mol⁻¹ indicates the presence of strong interactions between CO₂ and the Ca-A framework. Neutron and X-ray powder diffraction studies reveal the precise location of the adsorption sites for CO₂ in Ca-A and Mg-A. A detailed study of CO₂ adsorption kinetics further shows that the performance of Ca-A is not limited by slow CO₂ diffusion within the pores. Significantly, Ca-A exhibited a higher volumetric CO₂ uptake and CO₂/N₂ selectivity than Mg₂(dobdc) (dobdc⁴⁻ = 1,4-dioxido-2,5-benzenedicarboxylate; Mg-MOF-74, CPO-27-Mg), one of the best performing adsorbents. The exceptional performance of Ca-A was maintained in CO₂ breakthrough simulations.Tae-Hyun Bae, Matthew R. Hudson, Jarad A. Mason, Wendy L. Queen, Justin J. Dutton, Kenji Sumida, Ken J. Micklash, Steven S. Kaye, Craig M. Brown and Jeffrey R. Lon
Site-specific metal and ligand substitutions in a microporous Mn(2+)-based metal-organic framework
No full textFirst published online 16 Feb 2016The precise tuning of the structural and chem. features of microporous metal-org. frameworks (MOFs) is a crucial endeavour for developing materials with properties that are suitable for specific applications. In recent times, techniques for prepg. frameworks consisting of mixed-metal or ligand compns. have emerged. However, controlled spatial organization of the components within these structures at the mol. scale is a difficult challenge, particularly when species possessing similar geometries or chem. properties are used. Here, we describe the synthesis of mixed-metal and ligand variants possessing the Mn3L3 (Mn-MOF-1; H2L = bis(4-(4'-carboxyphenyl)-3,5-dimethylpyrazolyl)methane) structure type. In the case of mixed-ligand synthesis using a mixt. of L and its trifluoromethyl-functionalised deriv. (H2L' = bis(4-(4'-carboxyphenyl)-3,5-di(trifluoromethyl)pyrazolyl)methane), a mixed-ligand product in which the L' species predominanantly occupies the pillar sites lining the pores is obtained. Meanwhile, post-synthetic metal exchange of the parent Mn3L3 compd. using Fe2+ or Fe3+ ions results in cation exchange at the carboxylate clusters and metalation at the pillar bispyrazolate sites. The results demonstrate the versatility of the Mn3L3 structure type toward both metal and ligand substitutions, and the potential utility of site-specific functionalisations in achieving even greater precision in the tuning of MOFs. [on SciFinder(R)]Michael Huxley, Campbell J. Coghlan, Alexandre Burgun, Andrew Tarzia, Kenji Sumida, Christopher J. Sumby, and Christian J. Doona
Miyazawa Kenji and a Tale of “Kanji”
No full textMiyazawa Kenji (1896-1933), a poet and author of children’s stories, spent much of his life laboring to improve the material and spiritual lives peasants in the impoverished farming communities of Iwate Prefecture. He received little notice during his lifetime, but since the Second World War the sincerity of his work, reflecting a life of spiritual struggle, has attracted growing attention. In this paper we examine relationship between kanji and Miyazawa Kenji and the meaning of kanji for him referring some works including Otsuberu to Zou (1926, literally Otsuberu and the Elephant) and Kaze no Matasaburō (1934, literally Matasaburō of the Wind)
A Will from Miyazawa Kenji : Journey to the West, the Monkey King, and Dayu
No full textMiyazawa Kenji (1896-1933) is a well-known author of children\u27s literature from and poet. He created many children\u27s literature and poet applying with his inexhaustible imagination. At the same time he often applied his rich culture for Chinese classics including not only the Four Books and Five Classics of Confucianism but also popular novel like Journey to the West to his works. In this paper we examined Miyazawa Kenji\u27s works and discussed meanings of Chinese classics for Miyazawa Kenji
- …
