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6. A Unique Retractable Guide Block Used in Volar Locking Plate Fixation for Distal Radius Fracture

Author

Kadoma, C and Sasaki, I

Subjects
volar locking plate fixation, ddc: 610, retractable guide block, distal radius fracture, 610 Medical sciences, Medicine
Abstract

Objectives/Interrogation: Volar locking plate fixation is one of the most common surgical treatments in distal radius fracture. Careful attention during placing the plate and fixating the fracture needs to be payed not to injure soft tissues, especially median nerve, radial artery and flexor pollicis[for full text, please go to the a.m. URL], 14th Triennial Congress of the International Federation of Societies for Surgery of the Hand (IFSSH), 11th Triennial Congress of the International Federation of Societies for Hand Therapy (IFSHT), 11th Triennial Congress of the International Federation of Societies for Hand Therapy (IFSHT)

Published
2020
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8. Changes in plasma ghrelin and growth hormone concentrations in mature Holstein cows and three-month-old calves

Author

Miura, H., Tsuchiya, N., Sasaki, I., Kikuchi, M., Kojima, M., Kangawa, K., Hasegawa, Y., and Ohnami, Y.

Subjects
Cows -- Research, Zoology and wildlife conservation
Abstract

We measured changes in plasma ghrelin and GH concentrations in mature Holstein cows and 3-mo-old female Holstein calves fed at scheduled times. Our objective was to determine the characteristics of ghrelin secretion in dairy cattle and its influence on GH. Animals were fed at 0800 and 1600 for 2 wk before and during experiments. Plasma was sampled for 24 h at 2-h intervals in Exp. 1. In mature cows, plasma ghrelin concentrations decreased (P < 0.01) just after 0800 but not at the 1600 feeding. Ghrelin concentrations were lower (P < 0.01) in calves than in mature cows and they did not decrease after feeding in calves. The temporal relationship between ghrelin and GH remained unclear. In Exp. 2, plasma was sampled 2 h before and after both morning and evening feedings at 20-min intervals. Plasma ghrelin concentrations decreased (P < 0.05) 40 min after 0800 feeding and 60 min after 1600 feeding in mature cows. These results indicate that in mature cows, plasma ghrelin concentration decreased after feeding, but this decrease was not evident in 3-mo-old calves. Further studies are required to define the relationship between plasma ghrelin and GH concentrations. Key Words: Calves, Cows, Feeding, Ghrelin, Growth Hormone

Published
2004

23. Technical note: development of a duodenal cannula for sheep

Author

Horigane, A., Araki, T., Hashimoto, A.K., Shinoda, M., Sasaki, I., and Horiguchi,M.

Subjects
Catheterization -- Usage, Gastrointestinal system -- Research, Sheep -- Care and treatment, Zoology and wildlife conservation
Abstract

A T-shaped duodenal cannula of silicone with a gutter-type small inner flange with a polyester surgical mesh connected to the barrel of the cannula as anchor was developed and evaluated. It presented several advantages over the conventional hard ones in terms of application, recovery, and safety.

Published
1992

27. Effects of MoO3 addition on manganese zinc ferrites

Author

Matsuo, Y., Ono, K., Ishikura, M., and Sasaki, I.

Subjects
Ferrites (Magnetic materials) -- Research, Permeability -- Research, Grain boundaries -- Research, Business, Electronics, Electronics and electrical industries
Abstract

We examined the effect of added Mo[O.sub.3] on the initial permeability and other material characteristics in order to develop Mn-Zn ferrites with a high permeability. It was found that although Mo[O.sub.3] addition could expand the diameters of crystalline grains, it could also promote porosity, thereby impeding grain growth. When the amount of Mo[O.sub.3] was increased, the grain diameter expanded, peaked, and then gradually declined under the influence of porosity. However, by prolonging the top-temperature sintering period to curb porosity, it was possible to realize the grain-growth-promotion effect of Mo[O.sub.3]. Thus, we confirmed that high-permeability MnZn ferrites could be obtained using a sintering technique which would enhance ferrite density.

Published
1997

29. Magnetic properties and magnetostriction in grain-oriented (TbxDy(1-x))(Fe(1-y)Mny)1.95 compounds

Author

Kobayashi, T., Sasaki, I., Funayama, T., and Sahashi, M.

Subjects
Rare earth metals -- Magnetic properties, Substitution reactions -- Analysis, Rotational motion -- Analysis, Physics
Abstract

A study of the magnetic properties and magnetostriction of grain-oriented (Tb(x)Dy(1-x))(Fe(1-y)Mn(y))1.95 compounds, prepared by Bridgman method, indicates an enhancement of lambda(100) and lowering of spin reorientation temperature with Mn substitution. Applying suitable stress induces good thermal stability and large magnetostriction in low applied fields when x is 0.5 and y is 0.1. This compound finds use in giant magnetostrictive actuators.

Published
1994

30. Isolation of 76Br from irradiated Cu276Se targets using dry distillation: evaluations and improvement for routine production

Author

Watanabe, Sh., Watanabe, Sa., Ohshima, Y., Sugo, Y., Sasaki, I., Hanaoka, H., Ishioka, N. S., Japan Atomic Energy Agency, Takasaki, Gunma, Japan, and Chiba University Graduate School of Pharmaceutical, Chiba, Japan

Subjects
76Br, Cu2Se targets, PET imaging, ddc:530, 76Br, Kupferselenidtarget, PET Bildgebung
Abstract

Introduction 76Br is of interest for in vivo PET imaging applications. Its relatively long half-life (16.1 h) allows use not only on small molecules but also proteins which have slow excretion as carrier molecules. Irradiation using a low energy proton beam (~ 20 MeV) on an enriched Cu276Se target, followed by dry distillation with thermal chromatography, is one of the best methods to obtain sufficient amounts of 76Br for clinical applications1,2. However, the thermal chromatography is plagued by poor reproducibility and appears unsuitable for automation of its production, leading us to remove the thermal chroma-tography from the dry distillation. In this investigation we employed H2O solution to collect 76Br and optimized the distillation condition using a small amount of 77Br (57.0 h). We also produced large amount of 76Br under the optimized conditions to evaluate the dry distillation method. Material and Methods Target preparation and dry distillation were conducted based on the methods described in previous reports1,2. To produce 77Br, Cu2natSe target was irradiated with 20 MeV proton beams (5 µA) accelerated by AVF cyclotron in the Japan Atomic Energy Agency. The following two systems were used in the dry distillation optimization studies; (1) an initial system was composed of two furnaces, a main and an auxiliary furnace. Temperature of each furnace was set at 1050 °C (main) and 200 °C (auxiliary) respectively; (2) the second system was made of one large furnace composed of heating and cooling area. Temperature of the heating area was varied from 1050 to 1120 °C. In both systems PTFE tubing, leading to a H2O solution (15 mL), was inserted into the apparatus. The irradiated target was heated under streaming Ar gas (30 mL/min.). An enriched Cu276Se target (76Se enrichment: 99.67%) was used for 76Br production. Radioactivity was measured on a high-purity germanium (HPGe) detector coupled to a multichannel analyzer. TLC analyses were conducted on Al2O3 plates (Merck) using 7:1 acetone:H2O as the eluting solvent. Results and Conclusion Low efficiency (33 %) of 77Br recovery was ob-served in the initial system. Distribution of radioactivity inside the apparatus showed that 35 % was trapped in the PTFE tube and the quartz tube. The recovery yield was increased up to 54 % when the auxiliary furnace was turned off, indicating that the temperature gradient inside the quartz tube is suitable to carry 77Br effectively to the H2O trap. We initially used a quartz boat to place the irradiated target in the furnace, but found that using a reusable tungsten backing was better. However, we found that recovery yield was dramatically reduced to 18 %. The studies where the temperature was varied showed that releasing efficiency was increased up to 100 % at the temperature of 1120 °C. Good recovery yield (~ 77 %) was achieved after optimizing the temperature gradient (FIG. 1b). Using the optimized setup, 76Br production runs (n = 6) have been conducted, allowing us to recover up to 39.8 MBq/µAh (EOB) of 76Br. High specific activity (~4400 GBq/µmol) was obtained in the final solution. TLC analysis showed that chemical form obtained was bromide. We concluded that the dry distillation using H2O trap is capable of providing enough high purity 76Br for clinical applications.

Published
2015

32. Coercivity of [Sm.sub.2][Fe.sub.17][N.sub.3] particles prepared by mechanically grinding without exposing in air

Author

Sasaki, I., Fujii, H., Okada, H., and Suzuki, S.

Subjects
Magnets, Permanent -- Composition, Metals -- Finishing, Business, Electronics, Electronics and electrical industries
Abstract

As a first step for clarifying coercivity mechanism in high-performance permanent magnet, the effect of particle size on coercivity in [Sm.sub.2][Fe.sub.17][N.sub.3] was studied by mechanically grinding method without exposing in air. The coercivity increases with increasing the grinding time, reaches a maximum value of 1.23 T at grinding time for 60 min and gradually decreases beyond 90 min grinding. The resultant maximum energy product reaches up to 329 kJ/[m.sup.3] for 60 min grinding. However, the coercivity of 1.23 T is still too small compared with the anisotropy field, suggesting that the surface effect controls the coercive force in this system, rather than the size effect. Index Terms--[Sm.sub.2][Fe.sub.17][N.sub.3], high-pressure nitrogenation process, mechanical grind, zinc, coercivity (coercive force)

Published
1999

38. Isolation of 76Br from irradiated Cu276Se targets using dry distillation: evaluations and improvement for routine production

Author

Japan Atomic Energy Agency, Takasaki, Gunma, Japan, Chiba University Graduate School of Pharmaceutical, Chiba, Japan, Watanabe, Sh., Watanabe, Sa., Ohshima, Y., Sugo, Y., Sasaki, I., Hanaoka, H., Ishioka, N. S., Japan Atomic Energy Agency, Takasaki, Gunma, Japan, Chiba University Graduate School of Pharmaceutical, Chiba, Japan, Watanabe, Sh., Watanabe, Sa., Ohshima, Y., Sugo, Y., Sasaki, I., Hanaoka, H., and Ishioka, N. S.

Abstract

Introduction 76Br is of interest for in vivo PET imaging applications. Its relatively long half-life (16.1 h) allows use not only on small molecules but also proteins which have slow excretion as carrier molecules. Irradiation using a low energy proton beam (~ 20 MeV) on an enriched Cu276Se target, followed by dry distillation with thermal chromatography, is one of the best methods to obtain sufficient amounts of 76Br for clinical applications1,2. However, the thermal chromatography is plagued by poor reproducibility and appears unsuitable for automation of its production, leading us to remove the thermal chroma-tography from the dry distillation. In this investigation we employed H2O solution to collect 76Br and optimized the distillation condition using a small amount of 77Br (57.0 h). We also produced large amount of 76Br under the optimized conditions to evaluate the dry distillation method. Material and Methods Target preparation and dry distillation were conducted based on the methods described in previous reports1,2. To produce 77Br, Cu2natSe target was irradiated with 20 MeV proton beams (5 µA) accelerated by AVF cyclotron in the Japan Atomic Energy Agency. The following two systems were used in the dry distillation optimization studies; (1) an initial system was composed of two furnaces, a main and an auxiliary furnace. Temperature of each furnace was set at 1050 °C (main) and 200 °C (auxiliary) respectively; (2) the second system was made of one large furnace composed of heating and cooling area. Temperature of the heating area was varied from 1050 to 1120 °C. In both systems PTFE tubing, leading to a H2O solution (15 mL), was inserted into the apparatus. The irradiated target was heated under streaming Ar gas (30 mL/min.). An enriched Cu276Se target (76Se enrichment: 99.67%) was used for 76Br production. Radioactivity was measured on a high-purity germanium (HPGe) detector coupled to a multichannel analyzer. TLC analyses were conducted on Al2O3 plates (Me

Published
2015

39. Abstracts of Selected Papers Presented at the 28th Annual Meeting of the Japanese Society of Gastroenterology Kanazawa, Japan, October 1–3,1986

Author

Tozuka, S., Esumi, M., Uchida, T., Shikata, T., Ogata, N., Kamimura, T., Ichida, F., Hamada, C., Matsumoto, Hisashi, Yoneyama, T., Miyamura, T., Mitamura, K., Osuga, T., Yaginuma, K., Morishima, T., Koike, K., Hino, Okio, Fujise, K., Nagamori, S., Kameda, H., Yokosuka, Osamu, Omata, Masao, Murakami, Seishi, Torino, T., Nakamura, T., Nagaya, A., Matsubara, K., Kimura, Akira, Sasagawa, Tsutomu, Higashi, A., Watanabe, Y., Iwashita, A., Yao, T., Imamura, K., Hibi, T., Watanabe, M., Asakura, H., Tsuchiya, M., Hiwatashi, Nobuo, Miura, Masaaki, Sasaki, I., Funayama, Y., Sato, T., Wang, C. Y., Huang, L. H., Wang, T. H., Sung, J. L., Hsu, S. C., How, S. W., Kobayashi, Kenzo, Nakamura, Hironobu, Taguchi, Tetsuo, Jinno, Kenji, Yumoto, Yasuhiro, Tanaka, Yutaka, Mitomi, Toshio, Ryu, Munemasa, Nagashima, Tohru, Majima, Yasuo, Tanikawa, Kyuichi, Fukuda, Yoshihiro, Hiraoka, Masahiro, Onishi, Saburo, Saibara, Toshiji, Imawari, Michio, Ishikawa, Takashi, Shimada, Tatsuji, Nakao, Norio, Kobayashi, Kenichi, Yamasaki, Susumu, Hasegawa, Hiroshi, Takayasu, Kenichi, Muramatsu, Yukio, Kinoshita, Hiroaki, Sakai, Katsuji, Higashi, Shunsaku, Mizumoto, Ryuji, Fujihara, Shiro, Okamoto, Eizo, Ochiai, Atsushi, Tahara, Eiichi, Yokota, Takashi, Takahashi, Toshio, Sunagawa, Masakatsu, Endo, Mitsuo, Imai, Kohzoh, Yachi, Akira, Hiraiwa, Nozomu, Fukuda, Yoshihiro, Chung, Yong-Suk, Satake, Katsusuke, Sugano, Kokichi, Ohkura, Hisanao, Takemori, Yasuhiro, Sawabu, Norio, Fujiyama, Shigetoshi, Morishita, Takafumi, Okuda, Hiroaki, and Obata, Hiroshi

Published
1987
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47. Structure of ATP grasp protein

Author

Matsui, T., primary, Noike, M., additional, Ooya, K., additional, Sasaki, I., additional, Hamano, Y., additional, Maruyama, C., additional, Ishikawa, J., additional, Satoh, Y., additional, Ito, H., additional, Dairi, T., additional, and Morita, H., additional

Published
2014
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48. Structure of ATP grasp protein with AMP

Author

Matsui, T., primary, Noike, M., additional, Ooya, K., additional, Sasaki, I., additional, Hamano, Y., additional, Maruyama, C., additional, Ishikawa, J., additional, Satoh, Y., additional, Ito, H., additional, Dairi, T., additional, and Morita, H., additional

Published
2014
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50. P193 Long-term incidence and characteristics of intestinal failure in Crohn's disease: A Japanese multicentre study

Author

Watanabe, K., primary, Sasaki, I., additional, Fukushima, K., additional, Futami, K., additional, Ikeuchi, H., additional, Sugita, A., additional, Nezu, R., additional, Mizushima, T., additional, Kameoka, S., additional, Kusunoki, M., additional, Yoshioka, K., additional, Funayama, Y., additional, Watanabe, T., additional, Fujii, H., additional, and Watanabe, M., additional

Published
2014
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