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Maeda, Tetsuhiko,Nakano, Akihiro,Ito, Hiroshi,Motyka, Theodore,Perez-Berrios, Jose M.,Greenway, Scott The Korean Institute of Electrical Engineers 2013 The Journal of International Council on Electrical Vol.3 No.2
A Totalized Hydrogen Energy Utilization System (THEUS) is proposed for load leveling and stabilizing the grid. The THEUS is a novel unitized regenerative fuel cell system that achieves high overall efficiency through optimized heat utilization. In this paper, a metal hydride tank (MHT) is chosen as hydrogen storage. In the MHT, the heating and cooling from adsorption/desorption processes is used to produced heated and chilled water for building ventilation systems. A new horizontal type MHT was developed to enhance the recovery rate of the reaction heat. This tank has a double coil heat exchanger and contained 50kg of AB5 metal hydride. The experimental results were compared with the results which were developed previously at AIST. The new tank results showed an improvement for the heat recovery rate which is the ratio of recovered energy to the entire reaction heat of the metal hydride. The reaction heat recovery was improved due to the decrease of the thermal capacity of the tank.
The Development of the Totalized Hydrogen Energy Utilization System for Commercial Buildings
Maeda, Tetsuhiko,Nakano, Akihiro,Ito, Hiroshi,Tange, Manabu,Kawakami, Yoshiaki,Kato, Atsushi,Masuda, Masao The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.2
We have proposed the Totalized Hydrogen Energy Utilization System(THEUS) for applying to commercial buildings. THEUS consists of fuel cells, water electrolyzers, metal hydride tanks and their auxiliaries. We evaluated the energy saving of the basic THEUS in view of an actual operation using thermal demand data of actual buildings. The THEUS have ability for achieving energy saving, in comparison with an ice storage system for cooling demand. We have developed the hydrogen storage system using metal hydride and unitized reversible cell (URC) combine the functionality of a fuel cell and an electrolyzer in a single device, these are important components of THEUS. The metal hydride tank designed and manufactured to evaluate that we assumed actual operation in the experiments. We developed the numerical simulation code, and simulation results are in good agreement with experimental data. The simulation about two tanks system was done by using this code. The heat utilization can be improved greatly. To achieve URC commercial use, improvement of durability was examined. It confirmed that our URC had durability for several thousand hours.
Evaluation of Preparation Methods for Scanning Electron Microscopic Observation of Plant Protoplasts
MAEDA,Eizo,SATO,Tadahiko,Oh,Chang Kwon,TANIGUCHI,Takeshi,MIYAKE,Hiroshi 東亞大學校附設遺傳工學硏究所 1996 遺傳工學硏究 Vol.- No.3
佐藤忠彦·權 五昌**·三宅 博·谷口 武·前田英三 (名古屋大學農學部·**韓國東亞大學校農科大學) 要 旨:ペチュニアとイネのプロトプラストを用いて, 走査電子顯微鏡の試料調製法の檢討を行つた. アルコ-ル脫水處理中に生じるプロトプラストの形狀變化を??減するための固定條件を調査した. その結果, 固定條件の違いにより, 脫水處理により生じゐプロトプラストの體積の減少にかなりの差が認められ, グルタルアルデヒド固定, グルタルアルデヒド·オスミウム固定, グルタルアルデヒド·タンニン酸·オスミウム固定の順に, 體積の減少が少なくなつた, グルタルアルデヒド單獨固定の場合に, ペチュニア葉由來プロトプラストの葉綠體の綠色は, アルコ-ル脫水により脫色した. グルタルアルデヒド·タンニン酸·オスミウムで固定すゐと, ペチュニアとイネのプロトプラストの良く保存された走査電子顯微鏡像が得られた. Preparation methods for scanning electron microscopy (SEM) were studied with petunia and rice protoplasts. Fixation schedules to sustain protoplast size during alcohol dehydration were examined. When the different fixations were compared, the decrease in protoplast volume was observed to a variable extent during the dehydration process. The extent of volume decrease was reduced in order of glutaraldehyde, glutaraldehyde-osmium tetroxide, and glutaraldehyde-tannic acid-osmium tetroxide schedules. When fixed only with glutaraldehyde, the green color of the chloroplast in petunia leaf protoplasts was lost during alcohol dehydration. Well-defined scanning electron micrographs of petunia and rice protoplasts were obtained using a glutaraldehyde-tannic acid-osmium tetroxide schedule.
Maeda, Chihiro,Kim, Pyosang,Cho, Sung,Park, Jong Kang,Lim, Jong Min,Kim, Dongho,Vura-Weis, Josh,Wasielewski, Michael R.,Shinokubo, Hiroshi,Osuka, Atsuhiro WILEY-VCH Verlag 2010 Chemistry Vol.16 No.17
<P>meso-Triazolyl-appended Zn<SUP>II</SUP>–porphyrins were readily prepared by Cu<SUP>I</SUP>-catalyzed 1,3-dipolar cycloaddition of benzyl azide to meso-ethynylated Zn<SUP>II</SUP>–porphyrin (click chemistry). In noncoordinating CHCl<SUB>3</SUB> solvent, spontaneous assembly occurred to form tetrameric array (3)<SUB>2</SUB> from meso–meso-linked diporphyrins 3, and dodecameric porphyrin squares (4)<SUB>4</SUB> and (5)<SUB>4</SUB> from the L-shaped meso–meso-linked triporphyrins 4 and 5. The structures of these assemblies were examined by <SUP>1</SUP>H NMR spectra, absorption spectra, and their gel permeation chromatography (GPC) retention time. Furthermore, the structures of the dodecameric porphyrin squares (4)<SUB>4</SUB> and (5)<SUB>4</SUB> were probed by small- and wide-angle X-ray scattering (SAXS/WAXS) measurements in solution using a synchrotron source. Excitation-energy migration processes in these assemblies were also investigated in detail by using both steady-state and time-resolved spectroscopic methods, which revealed efficient excited-energy transfer (EET) between the meso–meso-linked Zn<SUP>II</SUP>–porphyrin units that occurred with time constants of 1.5 ps<SUP>−1</SUP> for (3)<SUB>2</SUB> and 8.8 ps<SUP>−1</SUP> for (5)<SUB>4</SUB>.</P> <B>Graphic Abstract</B> <P>Getting it together: In a noncoordinating solvent, spontaneous assembly occurs to form a tetrameric array from meso–meso-linked diporphyrins, and a dodecameric porphyrin square from L-shaped meso–meso-linked triporphyrins (see graphic). Efficient excited-energy transfer (EET) between the meso–meso-linked Zn<SUP>II</SUP>–porphyrin units was revealed. <img src='wiley_img_2010/09476539-2010-16-17-CHEM200903195-content.gif' alt='wiley_img_2010/09476539-2010-16-17-CHEM200903195-content'> </P>
Regeneration of Plantlets from petiole callus of wild viola (Viola patrinii DC.)
Miyake,Hiroshi,Taniguchi,Takeshi,Sato,Tadahiko,Oh,Chang Kwon,Maeda,Eizo 東亞大學校附設遺傳工學硏究所 1996 遺傳工學硏究 Vol.- No.3
Plantlets were regenerated from 5-year subcultured compact callus derived from petiole tissues of wild viola (Viola patrinii DC.) but not from 5-year subcultured friable callus. Regeneration occurred most efficiently on medium that contained two-fold diluted basal salts of Murashige and Skoog's (MS) medium, 5×10-6M 1-naphthaleneacetic acid and ?? M kinetin. The effect of dilution of MS basal salts could also be achieved solely by two-fold dilution of the potassium dihydrogen phosphate in the mixture. The present study revealed that dilution of MS basal salts, in particular of potassium dihydrogen phosphate, was important for the regeneration of wild viola. Moreover, although the callus had been subcultured for 5 years, regeneration of plantlets from callus was still possible. In addition, scanning electron microscopy revealed that details of the process of plant regeneration from subcultured callus varied with the age and source of callus and differed from that reported in rice.