PHOTOELECTRODEPOSITION OF COPPER ON BORON-DOPED DIAMOND FILMS

S. YOSHIHARA,K. SHINOZAKI,T. SHIRAKASHI 한국표면공학회 1999 한국표면공학회지 Vol.32 No.3

Effects of Strains of Saccharomyces cerevisiae and Incubation Conditions on the In vitro Degradability of Yeast and Roughage

Ando, S.,Nishiguchi, Y.,Hayasaka, K.,Yoshihara, Y.,Takahashi, J.,Iefuji, H. Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.3

The in vitro degradability of yeast and the effect of yeast on the in vitro degradability of forage may differ in terms of the specific yeast strains or their incubation conditions. Thus in experiment 1, two strains of sake yeast (strainK7 and strainK9) and one strain of bakers' yeast (KY5649) were incubated in an aerobic condition. In experiment 2, aerobically or anaero bically incubated K7 was used for investigating the in vitro degradability of yeast, the effect of yeast on the in vitro degradability of forage, and the degradability of yeast by pepsin and pronase treatment. The in vitrodegradability of bakers' yeast was significantly (p<0.05) higher than those of sake yeasts. The in vitro degradability of anaerobically incubated yeast was significantly (p<0.01) higher than that of aerobically incubated yeast. The degradability of bakers' yeast by pepsin treatment was significantly (p<0.01) higher than that of the sake yeasts. The degradability of bakers' yeast by pronase treatment was slightly higher than that of the two sake yeasts, while the degradability of anaerobically incubated yeast by both enzymes, respectively, was significantly (p<0.01) higher than that of aerobically incubated yeast. The degradability of forages was increased significantly (p<0.05) by the addition of yeasts. The degradability of roughage by sake yeast tended to be higher than that by the bakers' yeast. The degradability of roughage was significantly (p<0.05) higher by anaerobically incubated yeast than by aerobically incubated yeast. Given the above results, it seems that in vitro degradability of yeast and the magnitude of the increment of roughage degradation differ among the yeast strains and their incubation conditions.

Synthesis and characterization of TiO2/MoO3/carbon clusters composite material

H. Matsui,S. Nagano,S. Karuppuchamy,M. Yoshihara 한국물리학회 2009 Current Applied Physics Vol.9 No.3

Nano-sized TiO2/MoO3/carbon clusters composite material has been successfully obtained by the calcinations of a TiO(acac)2/MoO2(acac)2/epoxy resin complex under an oxygen atmosphere. The compositions of the resulting composite materials were determined using inductively coupled plasma (ICP) spectroscopy, elemental analysis and surface characterization by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The ultraviolet–visible (UV–Vis), X-ray photoelectron spectra (XPS) and electron spin resonance (ESR) spectra of the composites were also measured. ESR spectra of the composite materials suggest that they have visible light-responsive catalytic ability with an electron transfer process of carbon clusters → MoO3 → carbon clusters → TiO2. Nano-sized TiO2/MoO3/carbon clusters composite material has been successfully obtained by the calcinations of a TiO(acac)2/MoO2(acac)2/epoxy resin complex under an oxygen atmosphere. The compositions of the resulting composite materials were determined using inductively coupled plasma (ICP) spectroscopy, elemental analysis and surface characterization by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The ultraviolet–visible (UV–Vis), X-ray photoelectron spectra (XPS) and electron spin resonance (ESR) spectra of the composites were also measured. ESR spectra of the composite materials suggest that they have visible light-responsive catalytic ability with an electron transfer process of carbon clusters → MoO3 → carbon clusters → TiO2.

The electronic behaviors of visible light sensitive Nb2O5/Cr2O3/carbon clusters composite materials

H. Matsui,K. Kira,S. Karuppuchamy,M. Yoshihara 한국물리학회 2009 Current Applied Physics Vol.9 No.3

Nano-sized Nb2O5/Cr2O3/carbon clusters composite material has been successfully obtained by the calcination of a Nb(HC2O4)5/CrCl3/starch complex under an argon atmosphere. The compositions of the resulting composite materials were determined using ICP, elemental analysis and surface characterization by XRD and TEM. The UV–VIS and XPS spectra of the composites were also obtained. ESR spectral examinations suggest the possibility of an electron transfer in the process of Nb2O5→carbon clusters→Cr2O3. The reduction reaction of methylene blue with the resulting composite material has also been examined. Nano-sized Nb2O5/Cr2O3/carbon clusters composite material has been successfully obtained by the calcination of a Nb(HC2O4)5/CrCl3/starch complex under an argon atmosphere. The compositions of the resulting composite materials were determined using ICP, elemental analysis and surface characterization by XRD and TEM. The UV–VIS and XPS spectra of the composites were also obtained. ESR spectral examinations suggest the possibility of an electron transfer in the process of Nb2O5→carbon clusters→Cr2O3. The reduction reaction of methylene blue with the resulting composite material has also been examined.

The electronic behaviors of TiO2/MnO2/carbon clusters composite materials obtained by the calcination of a TiO(acac)2/Mn(acac)3/epoxy resin complex

H. Matsui,Y. Saito,S. Karuppuchamy,M. Yoshihara 한국물리학회 2009 Current Applied Physics Vol.9 No.6

The calcination of a TiO(acac)2/Mn(acac)3/epoxy resin complex under an oxygen atmosphere successfully produced nano-sized TiO2/MnO2/carbon clusters composite material. The surface characterizations of the resulting composites indicate that they are composed of nano-sized particles of TiO2, MnO2 and carbon clusters. ESR spectral examination suggests the possibility of an electron transfer in the process of MnO2→carbon clusters→TiO2. The visible light-responsive oxidation–reduction function of the composite materials has also been confirmed. The calcination of a TiO(acac)2/Mn(acac)3/epoxy resin complex under an oxygen atmosphere successfully produced nano-sized TiO2/MnO2/carbon clusters composite material. The surface characterizations of the resulting composites indicate that they are composed of nano-sized particles of TiO2, MnO2 and carbon clusters. ESR spectral examination suggests the possibility of an electron transfer in the process of MnO2→carbon clusters→TiO2. The visible light-responsive oxidation–reduction function of the composite materials has also been confirmed.

Characterization of Display - type Spherical Mirror Analyzer

정재인,A. Kurokawa,S.Ichimura,J.Toth,K.yoshihara 한국진공학회 1995 한국진공학회 학술발표회초록집 Vol.- No.-

Electronic behavior of visible light sensitive ZrO2/Cr2O3/carbon clusters composite materials

H. Miyazaki,H. Matsui,Y. Kita,S. Karuppuchamy,S. Ito,M. Yoshihara 한국물리학회 2009 Current Applied Physics Vol.9 No.1

Nano-sized ZrO2/Cr2O3/carbon clusters composite materials were successfully obtained by the microwave-irradiated calcinations of a Zr(acac)4/Cr(acac)3/epoxy resin complex. The compositions of the resulting composite materials were determined using ICP, elemental analysis and surface characterization by XRD, SEM and TEM. The UV–Vis spectra of the composites were also obtained. ESR spectral examinations of the composites indicate that an electron transfer takes place in the process Cr2O3 → carbon clusters → ZrO2. The composite materials have been found to show visible light-responsive catalytic activities. Nano-sized ZrO2/Cr2O3/carbon clusters composite materials were successfully obtained by the microwave-irradiated calcinations of a Zr(acac)4/Cr(acac)3/epoxy resin complex. The compositions of the resulting composite materials were determined using ICP, elemental analysis and surface characterization by XRD, SEM and TEM. The UV–Vis spectra of the composites were also obtained. ESR spectral examinations of the composites indicate that an electron transfer takes place in the process Cr2O3 → carbon clusters → ZrO2. The composite materials have been found to show visible light-responsive catalytic activities.

Electronic behavior of carbon clusters/hafnium oxide composite material

H. Matsui,T. Kuroda,T. Kawahara,S. Karuppuchamy,R. Kudoh,M. Yoshihara 한국물리학회 2009 Current Applied Physics Vol.9 No.1

An alternating hafnium-O-phenylene hybrid copolymer was calcined under the reduced pressure at 400–700 ℃ to obtain black-colored materials. XRD and TEM analyses showed that the calcined materials were composed of carbon clusters with the diameters of 20 nm and hafnium oxide particles with the diameters of a few nm. ESR spectral examinations revealed that the calcined materials formed a stable cation radical on the carbon clusters and exhibited an oxidation–reduction function. When Au particles were supported on the material, an efficient oxidation–reduction function was found to appear. An alternating hafnium-O-phenylene hybrid copolymer was calcined under the reduced pressure at 400–700 ℃ to obtain black-colored materials. XRD and TEM analyses showed that the calcined materials were composed of carbon clusters with the diameters of 20 nm and hafnium oxide particles with the diameters of a few nm. ESR spectral examinations revealed that the calcined materials formed a stable cation radical on the carbon clusters and exhibited an oxidation–reduction function. When Au particles were supported on the material, an efficient oxidation–reduction function was found to appear.

평면 표시형 구면경분석기의 분광 특성

정재인(J.I. Jeong),A. Kurokawa,S. Ichimura,J. Toth,K. Yoshihara,이영백(Y.P. Lee) 한국진공학회(ASCT) 1996 Applied Science and Convergence Technology Vol.5 No.3

새로운 형태의 2차원 평면 표시형 구변경분석기를 제조하여 그 특성을 평가하였다. 이 분석기는 고체 내에서 여기되어 방출된 전자의 에너지와 각도분포를 측정해서 해석하는데 사용하기 위한 것으로 궁극적으로는 비파괴적으로 단층적인 정보를 얻는 표면전자단층해석법 (Surface Electron Spectroscopic Tomography: SEN)를 개발하는 것을 목표로 하고 있다. 이 실험에 사용된 분석기는 H.Daimon 등이 개발한 것과 유사하나 외부에 미소 전자총을 사용한 점이 다르다. 그러나 미소전자총을 사용할 경우, 전자빔이 분석기에 인가된 전압에 의해 간섭을 받기 때문에 많은 문제점을 초래하게 된다. 본 연구에서는 이와 같은 경우에 발생된 제반 문제점과 이를 해결하기 위한 여러 가지 방안 그리고 조정된 분석기를 이용하여 실리콘 시편에서 얻은 Auger 스팩 트럼의 해석을 주로 기술하였다. A new display-type spherical mirror analyzer has been characterized in terms of the performance and the Auger spectra taken by using it. The final goal with the analyzer is to develop SET (Surface Electron Spectroscopic Tomography) which is capable to provide a 3-dimensional layer-by-Iayer information non destructively. This kind of analyzer was originally designed by H.Daimon. The main feature is to display 2-dimensional electronic structures directly onto a screen. In our case, an external micro-electron beam was employed as an excitation source. However, this invokes various problems because of the interference between the electron beam and the analyzer. The problems have been solved through the optimization of various parameters of the analyzer.

Microbial Transglutaminase Improves the Property of Meat Protein and Sausage Texture Manufactured with Low-quality Pork Loins

Katayama, K.,Chin, K.B.,Yoshihara, S.,Muguruma, M. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.1

Microbial transglutaminase (MTGase) was investigated to determine whether it was an effective binding agent for the processing of low-quality pork loins. MTGase especially promoted the coagulation of myosin heavy chain (MHC). However, the effect of MTGase on MHC from low-quality meat was less than that from the normal meat when the reaction time was not enough. The breaking strength of the heat-induced gel made of myosin B from low-quality meat with MTGase was lower than that of normal meat. Sausage made with low-quality meat with MTGase did not exhibit improved hardness, as compared to that made with normal meat. Results of this study indicated that use of low-quality meat in the manufacture of sausage was feasible to get textural property equal to that of normal meat sausage, when a half or more of the raw material was normal meat and MTGase was used in the sausage.