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Stability of phases in (Ba, Gd)MnO_3 solid solution system

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Journal of Rare Earths 2008年第2期26卷 233-236页

作者： Migaku Kobayashi Hidenori Tamura Hiromi Nakano hirohisa satoh Naoki Kamegashira Department of Chemistry and Biochemistry Numazu National College of Technology 3600 Ooka Numazu Electron Microscope Laboratory Ryukoku University Department of Materials Science Toyohashi University of Technology Tempaku-cho

The existing phases in BaxGd1-xMnO3 solid solution system （0≤x≤ 1） were studied by analyzing the detailed crystal structure of each composition from the results of the Rietveld method using powder X-ray diffraction data. For a small substitution of Ba for Gd （0≤x〈0. 1）, the orthorhombic phase with a perovskite type structure （Pnma space group） was stably formed and this fact was supported by the electron diffraction data. There existed an intermediate phase of Ba0.33Gd0.67MnO3, which was characterized as the tetragonal phase with perovskite structure. The composition range of this phase was narrow and almost line compound. Between the regions of these phases, there existed two-phase region. There was also a two-phase region between the intermediate tetragonal phase and BaMnO3. Measurement of electrical conductivities of these orthorhombic solid solutions and tetragonal phases showed semiconducting behaviors for both phases and the existence of the phase transition at high temperature for the orthorhombic phase, The transition temperature decreased as the Ba content increased.

关键词： rare earth manganite phase behavior X-ray diffractometry crystal structure electrical conductivity

Structural Analysis of a New Phase of BaNdMnO_4

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Journal of Rare Earths 2007年第S1期25卷 1-3页

作者： Hiromi Nakano Norikatsu Kawabata hirohisa satoh Naoki Kamegashira Ryukoku University SetaOtsu520-2194Japan Toyohasi University of Technology 441-8580Japan

Single crystal of BaNdMnO4 with I4/mmm was synthesized by a floating zone method. A new phase of BaNdMnO4 was obtained by annealing the single crystal in a reducing atmosphere at 573 K for 10 d. The structural change was analyzed by four-circle X-ray diffractometry and transmission electron microscopy. The new phase has an orthorhombic unit cell (Fmmm) of a=0.5486(2) nm, b=0.5484(2) nm, and c=1.3059(2) nm.

关键词： rare earth manganite structure transmission electron microscopy X-ray diffractometry

Current practice for pulmonary hypertension

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Chinese Medical Journal 2014年第19期127卷 3491-3495页

作者： Toru satoh Division of Cardiology Second Department of Internal Medicine Kyorin University School of Medicine Tokyo Japan

Objective To investigate the current practice of pulmonary hypertension including current epidemiology, diagnosis and treatment. Data sources The review was based on data obtained from the published articles and guidelines. Study selection Articles with high level of evidence or current best evidence in each issue were selected to be reviewed. Results Overall prevalence of pulmonary hypertension was 0.3% to 6% with left heart disease occupying the most proportion, followed by pulmonary disease, pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension. In diagnosis, a flow diagram of diagnosis of pulmonary hypertension, differential diagnosis of pulmonary hypertension and how to determine the severity of pulmonary hypertension are explained including recent development of magnetic resonance imaging and gene abnormality study on bone morphogenetic protein receptor ll. In treatment, newly- developed pulmonary vasodilators and the way to use them are shown to treat pulmonary hypertension. Conclusion Safer and more effective treatment algorithm and basic researches and clinical trials are warranted to be explored.

关键词： pulmonary hypertension epidemiology diagnosis treatment

Endothelin-1 stimulates contraction and migration of rat pancreatic stellate cells

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World Journal of Gastroenterology 2005年第39期11卷 6144-6151页

作者： Atsushi Masamune Masahiro satoh Kazuhiro Kikuta Noriaki Suzuki Kennichi satoh Tooru Shimosegawa Division of Gastroenterology Tohoku University Graduate School of Medicine SendaiJapan

AIM： To examine the ability of FT-1 to affect the cell functions of PSCs and the underlying molecular mechanisms. METHODS： PSCs were isolated from the pancreas of male Wistar rats after perfusion with collagenase, and cells between passages two and five were used. Expression of ET-1 and FT receptors was assessed by reverse transcription-PCR and immunostaining. Phosphorylation of myosin regulatory light chain （MLC）, extracellular-signal regulated kinase （FRK）, and Akt was examined by Western blotting. Contraction of PSCs was assessed on hydrated collagen lattices. Cell migration was examined using modified Boyden chambers. Ceil proliferation was assessed by measuring the incorporation of 5-bromo-2＇- deoxyuridine. RESULTS： Culture-activated PSCs expressed ETA and ETB receptors, and ET-1. ET-1 induced phosphorylation of NLC and FRK, but not Akt. ET-1 induced contraction and migration, but did not alter proliferation of PSCs. FT-1-induced contraction was inhibited by an ETA receptor antagonist BQ-123 and an ETB receptor antagonist BQ-788, whereas migration was inhibited by BQ-788 but not by BQ-123. A Rho kinase inhibitor Y-27632 abolished both contraction and migration. CONCLUSION： ET-1 induced contraction and migration of PSCs through El receptors and activation of Rho-Rho kinase. ETA and FTB receptors play different roles in the regulation of these cellular functions in response to ET-1.

关键词： Pancreatitis Pancreatic fibrosis Pancreatic stellate cells Endothelin-1 Rho kinase

The New Plating Process on Plastics

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材料热处理学报 2004年第5B期25卷 1119-1121页

作者： Makoto Imamura Jun Okada Kazuya satoh Okuno Chemical Industries Co. Ltd JapanOkuno Chemical Industries Co. Ltd JapanOkuno Chemical Industries Co. Ltd Japan

This process does not use general electroless plating solution containing formaldehyde(carcinogen) and phosphate(the object of waste water regulation). Furthermore, we succeeded in developing a new electroless copper plating solution which is usable semi-permanently by using the special reducing agent. The electroless deposition forms a very thin conductive film on substrate. Therefore, it can prevent some appearance defects (e.g. pits, pin-holes, laminations and inclusions) that occur in the conventional ones. In addition, it is possible to eliminate electroplating of copper from the process by applying the exclusive nickel solution in electroplating. Therefore, the obtained metal parts can be recycled as high quality stainless steel. Given this copper electroplating-free process, 25 u m-thick nickel deposition at the stage of electroplating, at least, enables the metal layers to show properties as versatile as those of the conventional(its total thickness is 25 n m in the comparative conventional process).

关键词：电镀再循环调磷调氮合成树脂

A User-friendly Living Cationic Polymerization: Degenerative Chaintransfer Polymerization of Vinyl Ethers by Simply Using Mixtures of Weak and Superstrong Protonic Acids

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Chinese Journal of Polymer Science 2019年第9期37卷 851-857页

作者： Mineto Uchiyama Masataka Sakaguchi Kotaro satoh Masami Kamigaito Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Furo-cho Chikusa-ku Nagoya University

Mixtures of a weak protonic acid and a trace amount of superstrong protonic acid were used for the simple control of the cationic polymerization of vinyl ethers via a degenerative chain-transfer mechanism, in which the former acid works as a precursor of the chain transfer agent (CTA) or the dormant species and the latter works as a source of the cationic propagating species. The addition of mixtures of phosphoric acid dibutyl ester ((n=BuO)2PO2H) or 1 -octanethiol (n-C8H17SH) and a trace amount of trifluoromethanesulfonic acid (TfOH) to a solution of isobutyl vinyl ether (IBVE) at -78℃ resulted in polymers with controlled molecular weights, which were basically determined by the feed ratio of IBVE to the weak protonic acid, and narrow molecular weight distributions (Mw/Mn≈ 1.1). These results were almost the same as those obtained using their prepared adducts of IBVE as CT As in the presence of a trace amount of TfOH under similar conditions. Methanesulfonic acid (CH3SO3H), whose adduct of IBVE has not been isolated due to instability, was similarly used in conjunction with trace TfOH to result in controlled molecular weights but slightly broader MWDs (Mw/Mn = 1.2-1.8). These results indicate that the sulfoxonium ion is also an effective intermediate in the cationic DT polymerization in addition to the phosphonium and sulfonium intermediates derived from (n=BuO)2PO2H and C8H17SH, respectively. The simple living cationic polymerization was thus achieved by using a combination of a weak protonic acid and a trace amount of TfOH, which are both easily available, low cost, free from metal, and easy to handle, without need for preparation of the initiator.

关键词： Living cationic polymerization Degenerative chain transfer RAFT polymerization Metal free Vinyl ether

MicroRNA in TLR signaling and endotoxin tolerance

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Cellular & Molecular Immunology 2011年第5期8卷 388-403页

作者： Md A Nahid Minoru satoh Edward KL Chan Department of Oral Biology University of FloridaGainesvilleFLUSA Division of Rheumatology and Clinical Immunology Department of Medicineand PathologyImmunologyand Laboratory MedicineUniversity of FloridaGainesvilleFLUSA

Toll-like receptors(TLRs)in innate immune cells are the prime cellular sensors for microbial *** activation leads to the production of proinflammatory mediators and thus TLR signaling must be properly regulated by various mechanisms to maintain ***4-ligand lipopolysaccharide(LPS)-induced tolerance or cross-tolerance is one such mechanism,and it plays an important role in innate *** is established and sustained by the activity of the microRNA miR-146a,which is known to target key elements of the myeloid differentiation factor 88(MyD88)signaling pathway,including IL-1 receptor-associated kinase(IRAK1),IRAK2 and tumor-necrosis factor(TNF)receptor-associated factor 6(TRAF6).In this review,we comprehensively examine the TLR signaling involved in innate immunity,with special focus on LPS-induced *** function of TLR ligand-induced microRNAs,including miR-146a,miR-155 and miR-132,in regulating inflammatory mediators,and their impact on the immune system and human diseases,are *** of these microRNAs may affect TLR pathway activation and help to develop therapeutics against inflammatory diseases.

关键词： innate immunity lipopolysaccharide LPS tolerance microRNA Toll-like receptor

Pharmacological characteristics of Kampo medicine as a mixture of constituents and ingredients

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Journal of Integrative Medicine 2013年第1期11卷 11-16页

作者： Hiroyasu satoh Health Life Science Shitennoji UniversityHabikino Osaka 583-8501 Japan

Herbal medicine in Japan is termed as Kampo medicine, which is derived from traditional Chinese medicine. Shakuyakukanzoto （Shao-Yao-Gan-Cao-Tang） as a kind of Kampo formulations is composed of just two components; Paeoniae Radix and Glycyrrhizae Radix, which produced marked relaxation of intestinal tract. Mokuboito （Mu-Fang-Ji-Tang） inhibited cardiac ionic channel currents, and as a mixture also produced great vasodilatation. Sinomenine （a main ingredient of Mokuboito） as a single compound also caused the vasodilatation, but decreased it along with ageing. Gypsum containing in Mokuboito and Chotosan （Diao-Teng-San） caused more marked effects, as compared with those without Gypsum. On the other hand, Rokumigan （Liu-Wei-Wan）, Hachimijiogan （Ba-Wei-Di-Huang-Wan） and Goshajinkigan （Niu- Che-Shen-Qi-Wan） increase in order the number of contained ingredients. The formulations with more herbs （ingredients） produced much more effective actions on rat aorta, presumably due to compensation of the decline of pharmacological sensitivity with ageing. Thus, there are some important differences between single chemical drugs and mixture drugs with many ingredients. The effects of Kampo medicine （mixture） are never just a sum of each effect induced by a lot of in qredients. For elder persons, furthermore, Kampo medicine exerts more effective actions.

关键词： Kampo medicine multiple compounds medicine, herbal anti-ageing drugs vasodilatation rats

Chemical Composition Control of Non-Metallic Inclusions in High Alloy Steel Production Process

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Journal of Iron and Steel Research International 2011年第S2期18卷 275-282页

作者： Naoya satoh Takahiro MIKI Mitsutaka HINO Department of Metallurgy Graduate School of Engineering Tohoku University now Yasuki Works Hitachi Metal Corporation Department of Metallurgy Graduate School of Engineering Tohoku University Professor Emeritus Tohoku University now Hokkaido Polytechnic College 3-130 Zenibako Otaru Hokkaido 047-0292 Japan

There is a close relation between the characteristics of products and the chemical composition control of inclusions in steelmaking process. Therefore, it is very important for a warranty of product’s characteristics to improve inclusion quality resulting in defective products. In the present work, the control technique of inclusions’ chemical composition is discussed thermodynamically based on the Redlich-Kister type polynomial to metallic solution and regular solution model to molten oxide solution. It is very effective for the precise chemical composition control of oxides to determine the concentration of deoxidizers based on the thermodynamic relation among dissolved deoxidizers and oxygen, because it is known that oxide inclusions are equilibrated with them in molten steel in the steel making process. High alloy steel production process was focused in the present work.

关键词： high alloy steel non-metallic inclusion deoxidation equilibrium redlich-Kister type polynomial regular solution model