Otsuka studies

N. Noguchi, I. Suemune, M. Yamanishi, G. C. Hua, and N. Otsuka, Study of luminescent region in anodized porous silicons by photoluminescence imaging and their microstructures, Jpn. J. Appl. Phys. 31, L490, 1992. 

The isomerization of an allylic amine to an enamine by means of a formal 1,3-hydrogen shift constitutes a relatively small structural change. However, this transformation could be extremely valuable if it could be rendered stereoselective. In important early studies, Otsuka and Tani showed that a chiral cobalt catalyst, prepared in situ from a Co(ii) salt, a chiral phosphine, and diisobutylaluminum hydride (Dibal-H), can bring about the conversion of certain pro-chiral olefins to chiral, isomeric olefins by double bond migra-... 

The effect of dislocations has also been studied by Bloembergen and Rowland 106) in cold-worked copper (Cu and Cu resonances), and also the effect of alloying in Al-Zn alloys (Al resonance) by Rowland 107). Otsuka and Kawamura 108) have studied the NMR of 1" in KI, Na in NaCl-NaBr mixed crystals, and Br in KBr-NaBr mixed crystals and have estimated dislocation densities in these materials. 

The methane decomposition reaction is severely constrained by equilibrium. A few studies have also been undertaken to circumvent the equilibrium constraints.Otsuka and coworkers used the addition of CaNis to Ni/Si02 for cheating equilibrium. The physical mixture of CaNis and Ni/Si02 showed greater than equilibrium methane (decomposition) conversion due to the hydrogen absorption property of CaNis. 

Surprisingly, the vanilloid receptor ligand capsaicin supplied the first experimental evidence for the association between SP and nociception (Gasparovic et al., 1964). Capsaicin depletes small primary afferents of at least SP, if not all of their peptide content, and this was accompanied by hypoalgesia. SP depolarizes the ventral root of an isolated rat spinal cord preparation (Konishi and Otsuka, 1974), and has also been shown to excite and/or depolarize neurons in the dorsal root (Urban et al., 1985). Furthermore, in studies on the larger laminae IV and V neurons, the selective agonist, [Sar9,... 

OwaT, Sugiyama T, Otsuka M, Ohno M (1990) A model study on the mechanism of theautoxidation of bleomycin. Tetrahedron Lett 31 6063-6066... 

Matsuda Y, Akazawa R, Teraoka R, Otsuka M. Pharmaceutical analysis of carbamazepine modifications comparative study of the photostability of caba-mazepine polymorphs by Fourier-transformed reflection-absorption infrared spectroscopy and colorimetric measurements. J Pharm Pharmacol 1994 46 162-167. 

Otsuka et al. (110, 112) studied the polymerization of butadiene in the presence of an aged Co2(CO)8/2 MoC15 catalyst. The product obtained was predominantly an atactic poly(l,2-butadiene), the 1,2-structure being favored by low reaction temperature (e.g., at 40° C, 97% 1,2 at 30° C, > 99% 1,2). Similar experiments with a Ni(CO)4/MoCl5 catalyst yielded a polymer with 85% cis- 1,4-structure. The results of Otsuka et al. have been confirmed by Babitski and co-workers (8), who studied the polymerization of butadiene by a large number of binary catalysts, based on transition metal halide, transition metal carbonyl combinations. These systems are of interest as further examples of alkyl-free coordination polymerization catalysts for dienes (9, 15a, 109). Little is known of the origins of stereospecificity of these reactions. 

Otsuka and co-workers (111) have also studied the polymerization of butadiene by a mixed Co2(CO)8/(C2H5)3 A1 catalyst. In an inert hydrocarbon solvent this catalyst results in a highly selective dimerization of... 

Since the original study of Otsuka, Arima and Iachello (OTS78), much work has been carried out on this subject. In spite of that, until now, the description of well deformed nuclei can not be considered satisfactory. We present here a new mapping technique which is directed toward the treatment of these systems. 

In the following, we discuss mostly the use of our BET for these simple models. We do this because it will help the reader to understand the essence of our BET, and also because these models were studied by Otsuka et. al. [10,11], and by Arima et. al. [12]. (They did this with a stated purpose of justifying the interacting-boson approximation (IBA) [13].) It will be seen below that, in spite of the use of the same models, the conclusions we arrive at differ significantly from those given by these authors. 

Kishi A, Otsuka M, Matsuda Y. 2002. The effect of humidity on dehydration behavior of nitrofurantoin monohydrate studied by humidity controlled simultaneous instrument for X-ray diffractormetry and differential scanning calorimetry (XRD-DSC). Colloid. Surf. B Biointerfaces 25 281-291. 

The proposed mechanism, based on detailed studies [S.-I. Inoue, H. Takaya, K. Tani, S. Otsuka, T. Sato and R. Noyori, J. Am. Chem. Soc., 1990,112, 4897] is schematically represented in Figure 22. Dissociation of one of the BINAP ligands gives the solvated species 1 which coordinates an allylamine molecule affording 11. Complex 11 undergoes (3-elimination to form the transient imi-nium-rhodium hydrido n complex 111. This complex isomerizes to the aza-allyl... 

Hiroaki Suga, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, japan Department of Advanced Interdisciplinary Studies, Graduate School of Engineering, The University of Tokyo, Tokyo, japan The Otsuka Protech Laboratory, Komaba Open Laboratory The University of Tokyo, Tokyo, japan... 

Matsuda, Y. Akazawa, R. Teraoka, R. Otsuka, M. Pharmaceutical evaluation of carbamazepine modifications— comparitive-study for photostability of carbamazepine polymorphs by using fourier-transformed reflection-absorption infrared-spectroscopy and colorimetric measurement. J. Pharm. Pharmacol. 1994, 46, 162-167. 

Hirasawa, N. Danjo, K. Haruna, M. Otsuka, A. Physio-chemical characterization and drug release studies of naproxen solid dispersions using lactose as a carrier. Chem. Pharm. Bull. 1998, 46 (6), 1027-1030. 

El-Shishtawy, R.M.A., Kitajima, Y., Otsuka, S., Kawasaki, S. and Morimoto, M. (1998a). Study on the behavior of production and uptake of photobiohydrogen by photosynthetic bacterium Rhodobacter sphaeroides R V, in Edited by Oskar R. Zaborsky, Plenum Press, London, 117-122. 

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