A. Tsuge, I. Hashimoto, T. Matsuda, Y. Nagano, M. Tashiro
{"title":"O-Benzoylation of 1- and 2-Naphthols with Benzoyl Chloride under Phase Transfer Catalyst","authors":"A. Tsuge, I. Hashimoto, T. Matsuda, Y. Nagano, M. Tashiro","doi":"10.15017/17248","DOIUrl":"https://doi.org/10.15017/17248","url":null,"abstract":"","PeriodicalId":11722,"journal":{"name":"Engineering sciences reports, Kyushu University","volume":"31 1","pages":"367-368"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81576549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Double-diffusive convective flows have been studied extensively in the context of physical oceanography.i-7' The most intensively investigated one of these is the thermohaline convection. The thermohaline convection may play an important role in the,mJ'xing of upper and lower layers of sea water. It has also been suggested that double-diffusive convection has some relevance to geophysical and metallurgical processes.8' No extensive studies on these processes, however, seem to have been initiated yet. Apart from these applications, a phenomenon of double-diffusive convection Per se is of fluid-mechanical interest. In recent years, the so called dissipative structures in diverse flow systems including double-diffusive convection have attracted many investigators.9-iL" Benard convection which occurs when a layer of fluid is heated from below gives rise to one of the typical dissipative structures (Benard cells). It was the study of this type of flow that led to evolution of the concept of chaos.i3-t6' The double-diffusive convective flows give rise to the dis.sipative structures more complicated than those due to a single diffusivecomponent convectlon. The purpose of this paper is to report some laboratory results relevant to the doublediffusive (mainly thermohaline) convection occurring near vertical plane walls of a water tank. Many photographs of the convective flow patterns in the tank will be presented.
{"title":"Near-Wall Double-Diffusive Convection","authors":"H. Honji, 本地 弘之","doi":"10.15017/17254","DOIUrl":"https://doi.org/10.15017/17254","url":null,"abstract":"Double-diffusive convective flows have been studied extensively in the context of physical oceanography.i-7' The most intensively investigated one of these is the thermohaline convection. The thermohaline convection may play an important role in the,mJ'xing of upper and lower layers of sea water. It has also been suggested that double-diffusive convection has some relevance to geophysical and metallurgical processes.8' No extensive studies on these processes, however, seem to have been initiated yet. Apart from these applications, a phenomenon of double-diffusive convection Per se is of fluid-mechanical interest. In recent years, the so called dissipative structures in diverse flow systems including double-diffusive convection have attracted many investigators.9-iL\" Benard convection which occurs when a layer of fluid is heated from below gives rise to one of the typical dissipative structures (Benard cells). It was the study of this type of flow that led to evolution of the concept of chaos.i3-t6' The double-diffusive convective flows give rise to the dis.sipative structures more complicated than those due to a single diffusivecomponent convectlon. The purpose of this paper is to report some laboratory results relevant to the doublediffusive (mainly thermohaline) convection occurring near vertical plane walls of a water tank. Many photographs of the convective flow patterns in the tank will be presented.","PeriodicalId":11722,"journal":{"name":"Engineering sciences reports, Kyushu University","volume":"43 1","pages":"401-408"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73990173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Oxidative esterification of lower alcohols was tested over the single-phase catalysts of the Sb-Mo-O system, which was known as Sb4Mo10O31 (X phase), Sb2Mo10O31 (Y phase) and Sb2MoO6 (Z phase). In the case of ethanol, X phase and Y phase gave stable activity compared to the Sb2O4-MoO3 mixed oxide catalyst, where Y phase gave higher yield of ethyl acetate but X phase gave acetaldehyde mainly. In comparison with oxidative esterification of a series of alcohols of C1-C4, it is concluded that the Sb-Mo-O catalyst is effective only in ethanol oxidation. The reduction experiment of the catalyst suggested that lattice oxygen was used in the stage of ethanol oxidation to acetaldehyde rather than the adsorbed oxygen.
{"title":"Sb-Mo-O系単一相複合酸化物触媒での各種アルコールの酸化的エステル化反応","authors":"王 連馳, 津田 雅之, 江口 浩一, 荒井 弘通, 清山 哲郎","doi":"10.15017/17215","DOIUrl":"https://doi.org/10.15017/17215","url":null,"abstract":"Oxidative esterification of lower alcohols was tested over the single-phase catalysts of the Sb-Mo-O system, which was known as Sb4Mo10O31 (X phase), Sb2Mo10O31 (Y phase) and Sb2MoO6 (Z phase). In the case of ethanol, X phase and Y phase gave stable activity compared to the Sb2O4-MoO3 mixed oxide catalyst, where Y phase gave higher yield of ethyl acetate but X phase gave acetaldehyde mainly. In comparison with oxidative esterification of a series of alcohols of C1-C4, it is concluded that the Sb-Mo-O catalyst is effective only in ethanol oxidation. The reduction experiment of the catalyst suggested that lattice oxygen was used in the stage of ethanol oxidation to acetaldehyde rather than the adsorbed oxygen.","PeriodicalId":11722,"journal":{"name":"Engineering sciences reports, Kyushu University","volume":"8 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"1991-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75702655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Kim, S. Kawagoe, Kazuyasu Matuo, 金 羲東, 川越 茂敏, 松尾 一泰
A simple analytical method for the interaction between weak normal shock waves and turbulent boundary layers on flat surfaces is presented. The flow is assumed to be adiabatic, two-dimensional and to follow the power-law form. An empirical relation for a normal shock wave in transonic flow is taken into account, and momentum and energy integral equations for the turbulent boundary layer are applied. This study is aimed to analyze the post-shock expansion caused by the shock/boundary layer interaction. The results show that the post-shock expansion is largely positioned outside the edge of boundary layer and the extent of it scales with the flow Mach number, and also show the qualitative agreement with experimental results.
{"title":"Analytical Study on Post-Shock Expansion in Transonic Flow","authors":"H. Kim, S. Kawagoe, Kazuyasu Matuo, 金 羲東, 川越 茂敏, 松尾 一泰","doi":"10.15017/17205","DOIUrl":"https://doi.org/10.15017/17205","url":null,"abstract":"A simple analytical method for the interaction between weak normal shock waves and turbulent boundary layers on flat surfaces is presented. The flow is assumed to be adiabatic, two-dimensional and to follow the power-law form. An empirical relation for a normal shock wave in transonic flow is taken into account, and momentum and energy integral equations for the turbulent boundary layer are applied. This study is aimed to analyze the post-shock expansion caused by the shock/boundary layer interaction. The results show that the post-shock expansion is largely positioned outside the edge of boundary layer and the extent of it scales with the flow Mach number, and also show the qualitative agreement with experimental results.","PeriodicalId":11722,"journal":{"name":"Engineering sciences reports, Kyushu University","volume":"122 1","pages":"319-328"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81415135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Mataka*, 又賀 駿太郎, W. Lin, 李 偉華, M. Tashiro, 田代 昌士, Kazufumi Takahashi, 高橋 和文, T. Hatta, 八田 泰三, A. Torii, 鳥井 昭美, シュンタロウ マタカ, リ イカ, マサシ タシロ, カズフミ タカハシ, タイゾウ ハッタ, アケミ トリイ
A series of 4, 7-Di (alkoxy-substituted) phenyl-1,2,5-thiadiazolo[3, 4-c]pyridines were prepared and their absorption and fluorescence spectre were obatined. These compounds showed a large stokes shift of 115-135 nm arid 6-aryl derivatives and 6-alkoxycarbonyl opes are strongly fluorescent in a solid state. and 1, 2, 5-oxadiazolo[3, 4-c]pyridine are strongly fluorescent in a solid state and, as a dyestuff, the for-mer is superior to the latter in the durablity.`) As a part of our studies on fluorescent heterocycles, we now report on the fluorescence of alkoxy-substituted 4, 6, 7-tri- and 4, 7-diaryl-1, 2, 5-thiadiazolo[3, 4-c]pyridines.
{"title":"Absorption and Fluorescence Spectra of 4, 7-Di (alkoxy-substituted) pheny1-1, 2, 5-thiadiazolo (3, 4-c) pyridine","authors":"S. Mataka*, 又賀 駿太郎, W. Lin, 李 偉華, M. Tashiro, 田代 昌士, Kazufumi Takahashi, 高橋 和文, T. Hatta, 八田 泰三, A. Torii, 鳥井 昭美, シュンタロウ マタカ, リ イカ, マサシ タシロ, カズフミ タカハシ, タイゾウ ハッタ, アケミ トリイ","doi":"10.15017/17192","DOIUrl":"https://doi.org/10.15017/17192","url":null,"abstract":"A series of 4, 7-Di (alkoxy-substituted) phenyl-1,2,5-thiadiazolo[3, 4-c]pyridines were prepared and their absorption and fluorescence spectre were obatined. These compounds showed a large stokes shift of 115-135 nm arid 6-aryl derivatives and 6-alkoxycarbonyl opes are strongly fluorescent in a solid state. and 1, 2, 5-oxadiazolo[3, 4-c]pyridine are strongly fluorescent in a solid state and, as a dyestuff, the for-mer is superior to the latter in the durablity.`) As a part of our studies on fluorescent heterocycles, we now report on the fluorescence of alkoxy-substituted 4, 6, 7-tri- and 4, 7-diaryl-1, 2, 5-thiadiazolo[3, 4-c]pyridines.","PeriodicalId":11722,"journal":{"name":"Engineering sciences reports, Kyushu University","volume":"40 1","pages":"183-193"},"PeriodicalIF":0.0,"publicationDate":"1990-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91486254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Motion of a screw dislocation in a bcc lattice has been investigated by computer simulation technique using Finnis-Sinclair potential (Ta). Motion under pure phear stress was compared with that under both shear and normal stress, i. e., conventional tensile condition. It was made clear that existence of normal stress reduced critical shear stress, i. e., Peierls stress for a screw dislocation. The total energy change was calculated during the screw dislocation motion overcoming Peierls potential, and sh6wed double peaks of the total energy exist within one atomic distance motion. This showed that Peierls potential has a camel－hump shape (double peak shape), which is desirable to explain the characteristic temperature dependence of the yield stress observed in bcc metals.
{"title":"Finnis-Sinclair ポテンシャルを用いたBCC結晶中のらせん転位の運動の計算機シュミレーション","authors":"槇井 浩一, 堤 哲男, 青野 泰久, 蔵本 英一","doi":"10.15017/17176","DOIUrl":"https://doi.org/10.15017/17176","url":null,"abstract":"Motion of a screw dislocation in a bcc lattice has been investigated by computer simulation technique using Finnis-Sinclair potential (Ta). Motion under pure phear stress was compared with that under both shear and normal stress, i. e., conventional tensile condition. It was made clear that existence of normal stress reduced critical shear stress, i. e., Peierls stress for a screw dislocation. The total energy change was calculated during the screw dislocation motion overcoming Peierls potential, and sh6wed double peaks of the total energy exist within one atomic distance motion. This showed that Peierls potential has a camel－hump shape (double peak shape), which is desirable to explain the characteristic temperature dependence of the yield stress observed in bcc metals.","PeriodicalId":11722,"journal":{"name":"Engineering sciences reports, Kyushu University","volume":"55 1","pages":"17-21"},"PeriodicalIF":0.0,"publicationDate":"1990-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83795430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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