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Magnetic Property of a Single Crystal of Spin-1/2 Triple-chain Magnet Cu3(OH)4SO4
Yutaka Fujii,Yuya Ishikawa,Hikomitsu Kikuchi,Yasuo Narumi,Hiroyuki Nojiri,Shigeo Hara,Hirohiko Sato 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The spin-1/2 triple-chain magnet Cu3(OH)4SO4 (mineral name: antlerite) is a candidate ‘idlespin’system. In order to study the phase transitions in this compound in detail, we have performedspecific-heat measurements under magnetic fields up to 10 T and in the temperature range downto 1.9 K and proton nuclear magnetic resonance (1H-NMR) experiments with single crystals. Wefound at least three successive phase transitions at zero field around 5 K which strongly dependon the value and the direction of the applied field. Another transition around 3 K was also found. 1H-NMR spectra in a low-temperature and low-field ordered phase indicated an antiferromagneticcommensurate spin structure with at least four sublattices, which is discussed in connection withthe idle-spin state. Phase diagrams show a richness of magnetic phases for this compound.
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Yuki Fujii,Yoshihide Kanno,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Keisuke Yonamine,Yujiro Kawakami,Toji Murabayashi,Fumisato Kozakai,Yutaka Noda,Hiroyuki Okada,Kei 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.2
Background/Aims: This study aimed to identify the predictive factors for inaccurate endoscopic ultrasound-guided fine needleaspiration (EUS-FNA) diagnosis of swollen lymph nodes without rapid on-site cytopathological evaluation. Methods: Eighty-three consecutive patients who underwent EUS-FNA for abdominal or mediastinal lymph nodes from January2008 to June 2017 were included from a prospectively maintained EUS-FNA database and retrospectively reviewed. The sensitivity,specificity, and accuracy of EUS-FNA for the detection of neoplastic diseases were calculated. Candidate factors for inaccurate diagnosis(lymph node size and location, needle type, puncture route, number of passes, and causative disease) were evaluated by comparisonbetween accurately diagnosed cases and others. Results: The final diagnosis of the punctured lymph node was classified as neoplastic (65 cases: a metastatic lymph node, malignantlymphoma, or Crow-Fukase syndrome) or non-neoplastic (18 cases: a reactive node or amyloidosis). The sensitivity, specificity, andaccuracy were 83%, 94%, and 86%, respectively. On multivariate analyses, small size of the lymph node was the sole predictive factor forinaccurate EUS-FNA diagnosis with a significant difference (odds ratios, 19.8; 95% confidence intervals, 3.15–124; p=0.0015). Conclusions: The lymph node size of <16 mm was the only independent factor associated with inaccurate EUS-FNA diagnosis ofswollen lymph nodes.
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Yuki Fujii,Kazuyuki Matsumoto,Hironari Kato,Yosuke Saragai,Saimon Takada,Sho Mizukawa,Shinichiro Muro,Daisuke Uchida,Takeshi Tomoda,Shigeru Horiguchi,Noriyuki Tanaka,Hiroyuki Okada 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.5
Background/Aims: This study aimed to examine the diagnostic ability of endoscopic ultrasonography (EUS) for major vascularinvasion in pancreatic cancer and to evaluate the relationship between EUS findings and pathological distance. Methods: In total, 57 consecutive patients who underwent EUS for pancreatic cancer before surgery were retrospectively reviewed. EUSimage findings were divided into four types according to the relationship between the tumor and major vessel (types 1 and 2: invasion,types 3 and 4: non-invasion). We also compared the EUS findings and pathologically measured distances between the tumors andevaluated vessels. Results: The sensitivity, specificity, and accuracy of EUS diagnosis for vascular invasion were 89%, 92%, and 91%, respectively, in theveins and 83%, 94%, and 93%, respectively, in the arteries. The pathologically evaluated distances of cases with type 2 EUS findings weresignificantly shorter than those of cases with type 3 EUS findings in both the major veins (median [interquartile range], 96 [0–742] µmvs. 2,833 [1,076–5,694] µm, p=0.012) and arteries (623 [0–854] µm vs. 3,097 [1,396–6,000] µm, p=0.0061). All cases with a distance of≥1,000 µm between the tumors and main vessels were correctly diagnosed. Conclusions: Tumors at a distance ≥1,000 µm from the main vessels were correctly diagnosed by EUS.
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Inoue, Mariko,Oishi, Yasuhiko,Fujii, Tomoyuki,Kobayashi, Hiroyuki Institute of Forest Science 2008 Journal of Forest Science Vol.24 No.3
Forestry education in vocational high schools is one of the fundamental keys for achieving sustainable forest management. However, support systems for forestry education have not been well developed in Japan. Forest research institutes, which have accumulated relevant information, should have sufficient ability to develop new educational programs in this field. This study examined the possibility of support systems for forestry technical education by a research institute. Educational programs for vocational high schools were developed, and the programs were examined for their practical applications through a workshop for these teachers. We set the following five requirements for the programs: They should 1) incorporate new contents related to sustainable forest management, 2) be based on forestry education textbooks, 3) meet recent demands of the schools and society, 4) allow participants to learn through actual practice and experience, and 5) utilize readily available teaching materials. With these criteria, we developed the following two educational programs: (a) Forest management program to teach advanced techniques, (b) A timber-program to teach about biomass resources. The workshop was held on July $28^{th}$, 2007 with ten teachers attending. The programs were very interesting, who gave them high average evaluation of 4.6 on a scale of 1 to 5. Only a few issues need to be resolved before classroom instruction can begin, such as making wood structure easier to understanding for some teachers, and obtaining base maps of school forests. In conclusion, forest research institutes can effectively support forestry education by providing and implementing programs based on scientific information.
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( Kenji Furukawa ),( Pham Khac Lieu ),( Hiroyuki Tokitoh ),( Ritsuko Hatozaki ),( Takao Fujii ) 한국물환경학회 ( 구 한국수질보전학회 ) 2005 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2005 No.-
Cultivation of extremely slow growing anammox bacteria was succeeded using up-flow column reactor packed with novel polyester non-woven as biomass carrier. Characterization of an anammox community on a polyester nonwoven attachment medium revealed an organism with a 16S rDNA sequence similarity of 92.2% to the archetypal Candidatus B. anammoxidans. The newly discovered strain (KSU-1, AB057453) was dominant (72.8%) among detectable members of a biofilm community. By fluorescence imaging, KSU-1 was shown to form spherical granular clusters wrapped in a thin layer of Zoogloea sp. This type of anammox reactor was successfully scale-up to the working volume to 50 L. Maximum total volumetric nitrogen removal rate of 1.68kg-N/㎥/d was achieved for the 4 months continuous operation. For the application of anammox reaction to the nitrogen removal process, half of influent NH4-N must be converted to NO2-N as a preceding step for anammox reaction. Operational conditions for this partial nitritation treatments using newly designed attach-immobilized reactor with the volumetric loading rate of 0.48 kg-N/㎥/d. were determined to be pH 7.5 to 7.7 at 35℃ experimentally. Anammox bacteria grew inside of the attach-immobilized sludge during the long term treatment of partial nitritation and influent NH4-N was successfully removed to dinitrogen gas only in one reactor. This newly discovered one stage NH4-N removal process was named as Single-Stage Nitrogen Removal Using Anammox and Partial Nitritation (SNAP) process. This SNAP reactor was operated under operational conditions of pH 7.5-7.7, 35℃ and DO 2-3㎎/ℓ, and 60 to 80% of influent NH4-N were removed under NH4-N loading rate of 0.4kgN/㎥/d. Through the DNA analysis of the sludge attached on net type acryl fiber biomass carrier, it was made clear that ammonium oxidizers and anammox bacteria coexisted in the same attach-immobilized sludge on biomass carriers. Favorable cultural condition for the growth of anammox bacteria was created inside attach-immobilized nitrifying sludge. Two kinds of anammox bacteria and two kinds of ammonium oxidizers were detected in the SNAP sludge. Exiting ratios of anammox and ammonium oxidizing bacteria were estimated to be 15% and 8.7%, respectively, based on the obtained clone numbers in the PCR analysis for SNAP sludge. This coexisting condition was confirmed by the confocal scanning electron microscope on the FISH image of SNAP sludge.
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Forestry Education Support by a Forest Research Institute : High Schools
Mariko Inoue,Yasuhiko Oishi,Tomoyuki Fujii,Hiroyuki Kobayashi 강원대학교 산림과학연구소 2008 Journal of Forest Science Vol.24 No.3
Forestry education in vocational high schools is one of the fundamental keys for achieving sustainable forest management. However, support systems for forestry education have not been well developed in Japan. Forest research institutes, which have accumulated relevant information, should have sufficient ability to develop new educational programs in this field. This study examined the possibility of support systems for forestry technical education by a research institute. Educational programs for vocational high schools were developed, and the programs were examined for their practical applications through a workshop for these teachers. We set the following five requirements for the programs: They should 1) incorporate new contents related to sustainable forest management, 2) be based on forestry education textbooks, 3) meet recent demands of the schools and society, 4) allow participants to learn through actual practice and experience, and 5) utilize readily available teaching materials. With these criteria, we developed the following two educational programs: (a) Forest management program to teach advanced techniques, (b) A timber-program to teach about biomass resources. The workshop was held on July 28th, 2007 with ten teachers attending. The programs were very interesting, who gave them high average evaluation of 4.6 on a scale of 1 to 5. Only a few issues need to be resolved before classroom instruction can begin, such as making wood structure easier to understanding for some teachers, and obtaining base maps of school forests. In conclusion, forest research institutes can effectively support forestry education by providing and implementing programs based on scientific information.
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Invasiveness Reduction of Recent Total En Bloc Spondylectomy: Assessment of the Learning Curve
Takayoshi Ishii,Hideki Murakami,Satoru Demura,Satoshi Kato,Katsuhito Yoshioka,Moriyuki Fujii,Takashi Igarashi,Hiroyuki Tsuchiya 대한척추외과학회 2016 Asian Spine Journal Vol.10 No.3
Study Design: Case-control study. Purpose: To evaluate the surgical magnitude and learning curve of “second-generation” total en bloc spondylectomy (TES). Overview of Literature: In June 2010, we developed second-generation TES combined with tumor-induced cryoimmunology, which does not require autograft harvesting. Methods: TES was performed in 63 patients between June 2010 and September 2013. Three groups of patients were evaluated: 20 undergoing surgery in the first year of development of second-generation TES (group I), 20 in the second year (group II), and 23 in the third year (group III). Patient backgrounds showed no remarkable differences. Operating time, intraoperative blood loss, blood transfusion, and postoperative C-reactive protein and creatine phosphokinase were compared among the groups. Results: Mean±standard deviation operating time was 486±130 minutes in group I, 441±85 minutes in group II, and 396±75 minutes in group III. The time was significantly shorter in group III than in group I (p <0.05). Intraoperative blood loss was 901±646 mL in group I, 433±177 mL in group II, and 411±167 mL in group III. Blood loss was significantly lower in groups II and III than in group I (p <0.01). Transfusion was not required in 20 of 23 patients in group III, and mean C-reactive protein levels on postoperative day 3 were significantly lower in this group than in group I (6.12 mg/L vs. 10.07 mg/L; p <0.05). Postoperative creatine phosphokinase levels did not differ among the groups. Conclusions: TES is associated with a significant learning curve. Thus, second-generation TES can no longer be considered highly invasive.
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