Characterization of TiO₂–Ag nanocomposite particles prepared by spray pyrolysis process using transmission electron microscopy and three-dimensional electron tomography

Kaneko, Kenji,Moon, Won-Jin,Inoke, Koji,Horita, Zenji,Ohara, Satoshi,Adschiri, Tadafumi,Abe, Hiroya,Naito, Makio Elsevier 2005 Materials science & engineering. properties, micro Vol.403 No.1

<P><B>Abstract</B></P><P>TiO<SUB>2</SUB>–Ag nanocomposite particles were prepared by spray pyrolysis of TiO<SUB>2</SUB> (7nm) dispersed AgNO<SUB>3</SUB> solution. The structures and morphologies of powders were carefully characterized by combination of transmission electron microscopy (TEM) and three-dimensional electron tomography (3D-ET). It was clearly demonstrated by 3D-ET that the TiO<SUB>2</SUB>–Ag nanocomposite particle was consisted of well-dispersed Ag nanoparticles within TiO<SUB>2</SUB> matrix. Furthermore, it was shown by high-resolution TEM that the spray pyrolysis was capable of fabricating Ag particles with a few nm in size.</P>

Powder Neutron Diffraction Study of HoCoGa5

Riki Kobayashi,Koji Kaneko,Shuichi Wakimoto,Songxue Chi,Naoyuki Sanada,Ryuta Watanuki,Kazuya Suzuki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3

We have studied successive magnetic transitions of HoCoGa5 at TN1 = 9.6 K and TN2 = 7.5 Kby using powder neutron diffraction. Apparent superlattice peaks were observed at temperaturesbelow TN1. With further decreases temperature, the patterns exhibit a substantial change at temperaturesbelow TN2. The observed magnetic peaks at 8 K (AntiFerromagnetic InCommensurate(AFIC) phase : TN2 < T < TN1) can be represented by the propagation vector qL = (1/2 0 ) with = 0.35(2). In contrast, the magnetic structure becomes commensurate with qC = (1/2 0 1/2) at4 K (AntiFerromagnetic Commensurate (AFC) phase : T < TN2). The temperature dependence ofmagnetic intensity shows an apparent temperature hysteresis at TN2, indicates a first-order transitionat TN2. Analysis of the integrated intensity at 4 K reveals that the Ho moment with a sizeof 8.6(2) µB, oriented parallel to the c-axis in the AFC phase. While the successive transitionsof HoCoGa5 are different from those of TbCoGa5, the magnetic structure in the AFC phase ofHoCoGa5 is the same as the AFTbI of TbCoGa5, and may indicate an additional transition at alower temperature in HoCoGa5.

Numerical Method for Achieving Smoothness of Fracture Plane and Minimizing Overbreak in Tunnel-Blasting

Daisuke FUKUDA,Katsuhiko KANEKO,Koji ISHIYAMA,Masashi NAITOH,Sang Ho CHO 한국암반공학회 2009 한국암반공학회 학술대회 및 세미나 자료집 Vol.2009 No.10

한국과 일본 된장 중의 sodium 과 potassium 함량에 관한 연구

김천호,김자헌태랑,김전상지,각야맹,회전구인자,산전행이 한국식생활문화학회 1993 韓國食生活文化學會誌 Vol.8 No.1

된장은 한국과 일본의 식생활상 중요한 전통식품이나 10∼20%의 비교적 높은 염분함량으로 건강상 또는 여러가지 질병의 원인이 되고 있다고 보고 있다. 그러나 근래에는 Na함량 뿐만이 아니라 K함량과의 比도 중요하다고 보고 있어서 본 연구에서는 한국과 일본 된장들의 Na, K, NaCl함량과 동시에 Na/K比를 측정하고 양국간의 비교도 하였기에 보고한다. 한국의 시판 된장과 가내제품의 Na의 평균함량은 각각 4181.3㎎/100g, 6015.6㎎/100g 이고 일본에 있어서는 5082㎎/100g, 5890.6㎎/100g이다. 한국의 시판 된장과 가내제품의 K의 평균함량은 각각 595.8㎎/100g, 331.3㎎/100g 이고 일본에 있어서는 365.4㎎/100g, 381.3㎎/100g이다. 한국의 시판 된장과 가내제품의 NaCl의 평균함량은 각각 10.62%, 15.28%이고 일본에 있어서는 12.91%, 14.96%이다. 한국의 시판 된장과 가내제품의 Na/K比의 평균치는 각각 7.25, 21.54이고 일본에 있어서는 14.42, 16.14이다. 이상의 결과에서 예상과는 달리 한국의 시판 된장이 가내제품에 비해서 NaCl양이 적고 그외에도 Na양과 Na/K比에서도 다른 제품들에 비하여 낮으므로서 영양상 유리함을 나타냈다. We obtained the following results from determination of the sodium and potassium content contained in Denjang made in Korea and Japan. The mean sodium content of commercial denjang and home made denjang made in Korea and those of Japan are 4181.3㎎/100g, 6015.6㎎/100g and 5082.5㎎/100g, 5890.6㎎/100g, respectively. The mean potassium content of commercial denjang and home made denjang made in Korea and those of Japan are 595.8㎎/100g, 331.3㎎/100g and 365.4㎎/100g, 381.3㎎/100g, respectively. The mean NaCl concentration of commercial denjang and home made denjang made in Korea and those of Japan are 10.62%, 15.28% and 12.91%, 14.96% respectively. The mean Na/K ratios of commercial denjang and home made denjang made in Korea and those of Japan are 7.25, 21.54 and 14.42, 16.14 respectively.

Neutron Scattering Study of Antiferromagnet U₂Pt<SUB>6</SUB>Al<SUB>15</SUB>

Kyugo Ota,Yuji Matsumoto,Yuki Watabe,Koji Kaneko,Chihiro Tabata,Yoshinori Haga 한국물리학회 2023 새물리 Vol.73 No.12

We have performed the neutron scattering study of antiferromagnet U₂Pt<SUB>6</SUB>Al<SUB>15</SUB> with the honeycomb lattice to determine the magnetic structure. U₂Pt<SUB>6</SUB>Al<SUB>15</SUB> exhibits two phase transitions at Tm₁ = 9 K and Tm₂ = 26 K. In phase I at Tm₁ < T < Tm₂, the magnetic reections described by a propagation vector k<SUB>I</SUB> = (1/3, 0, 0) were observed. In phase II at T < Tm₁, magnetic reections of k<SUB>I</SUB> = (1/3, 0, 0) and k<SUB>II</SUB> = (1/2, 0, 0) were observed and the magnetic reection intensity of k<SUB>I</SUB> = (1/3, 0, 0) is weak but finite. The hysteresis in the temperature dependent intensities is observed across the phase transition at Tm1, suggesting that the transition at Tm1 is of first order.

Genome analysis of Rubritalea profundi SAORIC-165T, the first deep-sea verrucomicrobial isolate, from the northwestern Pacific Ocean

송재호,Ilnam Kang,Yochan Joung,Susumu Yoshizawa,Ryo Kaneko,Kenshiro Oshima,Masahira Hattori,Koji Hamasaki,Kazuhiro Kogure,Soochan Kim,Kangseok Lee,Jang-Cheon Cho 한국미생물학회 2019 The journal of microbiology Vol.57 No.5

Although culture-independent studies have shown the presence of Verrucomicrobia in the deep sea, verrucomicrobial strains from deep-sea environments have been rarely cultured and characterized. Recently, Rubritalea profundi SAORIC- 165T, a psychrophilic bacterium of the phylum Verrucomicrobia, was isolated from a depth of 2,000 m in the northwestern Pacific Ocean. In this study, the genome sequence of R. profundi SAORIC-165T, the first deep-sea verrucomicrobial isolate, is reported with description of the genome properties and comparison to surface-borne Rubritalea genomes. The draft genome consisted of four contigs with an entire size of 4,167,407 bp and G+C content of 47.5%. The SAORIC-165T genome was predicted to have 3,844 proteincoding genes and 45 non-coding RNA genes. The genome contained a repertoire of metabolic pathways, including the Embden-Meyerhof-Parnas pathway, pentose phosphate pathway, tricarboxylic acid cycle, assimilatory sulfate reduction, and biosynthesis of nicotinate/nicotinamide, pantothenate/ coenzyme A, folate, and lycopene. The comparative genomic analyses with two surface-derived Rubritalea genomes showed that the SAORIC-165T genome was enriched in genes involved in transposition of mobile elements, signal transduction, and carbohydrate metabolism, some of which might be related to bacterial enhancement of ecological fitness in the deep-sea environment. Amplicon sequencing of 16S rRNA genes from the water column revealed that R. profundi-related phylotypes were relatively abundant at 2,000 m and preferred a particle-associated life style in the deep sea. These findings suggest that R. profundi represents a genetically unique and ecologically relevant verrucomicrobial group well adapted to the deep-sea environment.

Nationwide distribution of Kyo-yasai (heirloom vegetables in Kyoto) and the advantages of traditional farming methods with importance of ‘Syun’: a case of mizuna

Nakamura Takako,Nakao Asuka,Watanabe Minami,Ueda Kinji,Matsuda Toshihiko,Matsumoto Seiji,Yamaguchi Toshiharu,Haikata Masaho,Kaneko Asuka,Shirota Koji,Sasaki Azusa,Okamoto Shigehisa,Nakamura Yasushi 한국식품연구원 2022 Journal of Ethnic Foods Vol.9 No.-

Introduction: This study aimed to review the farming activity and the administrative measure to successfully increase the distribution of heirloom vegetable “mizuna” nationwide by examining the paradigm shift in the use of its young less-branched form for salad. We also discussed that breeding programs of the young form ironically resulted in reduction the flavor and the antimutagenicity of this vegetable. Methods: Through hearing survey, we explored reasons for the successful nationwide distribution of heirloom vegetable, mizuna. Through chemical analysis, the fragrant ingredients in mizuna, their antimutagenicity and the changes in their amount for one year were determined. Results and discussion: The primary factor for commencing the distribution of mizuna includes the new idea of using young less-branched form of mizuna as salad ingredient, which has been recognized by most who were involved in promoting the distribution of mizuna among farmers, distributors, and employees of agricultural extension section at Kyoto Prefecture office. The secondary factor is the fact that the primary factor coincides on a time axis with other two factors: the occurrence of the boom of Kyoto’s heirloom vegetables and the Vegetable Management Stabilization Project found as a measure of Kyoto Prefecture. We determined three fragrant compounds in mizuna, 3-butenyl isothiocyanate, 3-phenylpropionitrile, and phenylethyl isothiocyanate, of which their antimutagenic effects were also identified. Those amounts were highest at the best harvest season called ‘Syun’ in the past because of the cold temperature of Japanese winter in traditional open-field cultivation. Conclusion: It implied that the successful nationwide distribution of mizuna resulted from the administrative measures based on the paradigm shift in the new use of mizuna for salad due to increase in demand of the vegetable in contemporary dishes. The traditional cultivation of mizuna might be suitable if wishing the flavor and antimutagenicity at the best harvest season ‘Syun’.

Risk factors for non-reaching of ileal pouch to the anus in laparoscopic restorative proctocolectomy with handsewn anastomosis for ulcerative colitis

Shigenobu Emoto,Keisuke Hata,Hiroaki Nozawa,Kazushige Kawai,Toshiaki Tanaka,Takeshi Nishikawa,Yasutaka Shuno,Kazuhito Sasaki,Manabu Kaneko,Koji Murono,Yuuki Iida,Hiroaki Ishii,Yuichiro Yokoyama,Hiroyu 대한장연구학회 2022 Intestinal Research Vol.20 No.3

Background/Aims: Restorative proctocolectomy (RPC) with ileal pouch-anal anastomosis and handsewn anastomosis for ulcerative colitis requires pulling down of the ileal pouch into the pelvis, which can be technically challenging. We examined risk factors for the pouch not reaching the anus.Methods: Clinical records of 62 consecutive patients who were scheduled to undergo RPC with handsewn anastomosis at the University of Tokyo Hospital during 1989–2019 were reviewed. Risk factors for non-reaching were analyzed in patients in whom hand sewing was abandoned for stapled anastomosis because of nonreaching. Risk factors for non-reaching in laparoscopic RPC were separately analyzed. Anatomical indicators obtained from presurgical computed tomography (CT) were also evaluated.Results: Thirty-seven of 62 cases underwent laparoscopic procedures. In 6 cases (9.7%), handsewn anastomosis was changed to stapled anastomosis because of non-reaching. Male sex and a laparoscopic approach were independent risk factors of non-reaching. Distance between the terminal of the superior mesenteric artery (SMA) ileal branch and the anus > 11 cm was a risk factor for non-reaching.Conclusions: Laparoscopic RPC with handsewn anastomosis may limit extension and induction of the ileal pouch into the anus. Preoperative CT measurement from the terminal SMA to the anus may be useful for predicting non-reaching.