巻号一覧
1 巻 (1975)
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1 巻, 6 号
選択された号の論文の18件中1～18を表示しています
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沢田 達郎, 丁子 哲治, 久野 滋1975 年 1 巻 6 号 p. 553-558
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe microbial growth models represented by concentrations of cell mass and substrate like Monod's equation simulate the concentration in steady state, but these models are unable to describe the growth process in transient state. This work has intended to evaluate microbial growth quantitatively on the basis of macromolecular synthesis and metabolic state. For a batch culture of E. coli BB, the contents and synthetic rates of DNA, RNA and protein with relation to the specific growth rate have been formulated with an equation based on biochemical synthesis of these macromolecules. The calculations from these equations agree fairly well with the experimental observations, including the fact that the cellular contents of DNA, RNA and protein per cell vary specific growth rate and are constant with various media, regardless of growth temperature.抄録全体を表示PDF形式でダウンロード (949K) -
川上 幸衛, 楠 浩一郎1975 年 1 巻 6 号 p. 559-564
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe hydrogenation of chlorobenzene on a 5% Pt-carbon catalyst suspended in a stirred reactor was studied in order to clarify the relationship between selectivity and operating conditions for consecutive reaction in a gas-liquid-particle system. The overall reaction rate was affected by the gas-liquid mass transfer resistance of hydrogen. It was found that the reaction order with respect to hydrogen concentration increased from 0.2 to 0.5 for the first-step reaction and was about 0.6 for the second step at 5 to 35°C. The reaction rates were expressed by the experimental equations on the basis of Langmuir-Hinshelwood type equations using a nonlinear least squares method. High selectivity of benzene was achieved at a temperature around 20°C and low initial concentration of chlorobenzene. Further, the selectivity increased as the hydrogen concentration or the stirring speed was reduced. These effects were confirmed by means of the rate equations and the mass transfer resistance evaluated.抄録全体を表示PDF形式でダウンロード (988K) -
桐栄 良三, 松野 隆一, 尾市 守弘, 鍵崎 正己, 塚田 隆治1975 年 1 巻 6 号 p. 565-570
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーBehavior of spouts and bubbles formed just above a single-hole distributor was studied in a two-dimensional fluidized bed. The gas flow around the spout was studied by tracing the expanding boundary of brown NO2 gas and the spout was found to be a source of gas flow to the continuous phase. Experimental results were explained by the potential flow model, considering the spout as the flow source.
The particle motion was also studied and the stream line of particles around the spout was obtained. The particle behavior which was considered to contribute to the rapid transfer phenomena at the bed bottom were made clear.抄録全体を表示PDF形式でダウンロード (3472K) -
桐栄 良三, 松野 隆一, 尾市 守弘, 久保 清和, 柳田 敏洋1975 年 1 巻 6 号 p. 571-576
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーIn a two-dimensional fluidized bed with a perforated plate, several characteristics of initial bubbles formed just above holes and the changes of bubble frequency, volume and diameter with bed height were studied quantitatively. Characteristics of initial bubbles were expressed in empirical formulas. It was found that the two-phase theory could not be applied for the initial bubble of coarse particles of which the minimum fluidization velocity was large. The changes of bubble characteristics with bed height were estimated by two simple models where the results obtained for initial bubbles were employed as the initial values. Calculated results agreed well with experiment.抄録全体を表示PDF形式でダウンロード (1015K) -
幡手 泰雄, 大隈 茂, 加藤 康夫1975 年 1 巻 6 号 p. 577-582
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe behavior of kerosine droplets in water was studied in bubble columns, 6.6 cm and 12.2 cm in diameter, The longitudinal dispersion coefficients of droplets (ED) were correlated with Peclet number (PeD=uGDT/ED) and Froude number (Fγ = uG/√gDT) as the following empirical equation.
PeD=10Fγ/ (1+6.5Fγ0.8)
where uG [cm / sec] is superficial gas velocity, DT [cm] is column diameter and g [cm/sec2] is gravitational acceleration.
The longitudinal concentration distributions of droplets were analyzed by using the ascending dispersion model and the following empirical equations were obtained.
νds = 3.4uG-1.2 / (1+2u) D (1+0.76uT0.75) (1-C) 4.0 (at DT = 6.6 and 12.2cm)
1-C / C* = 4.5νds 2uT-0.32 / (1+6.0νds+4.8νds2) (at DT = 6.6cm)
1-C / C* = 3.2νds2uT-0.16/ (1+6.0νds+3.1νds2) (at DT = 12.2cm)
where νds [cm / sec] is mean slip velocity of droplets, uD [cm / sec] is superficial velocity of kerosine, uT [cm / sec] is superficial velocity of total liquids, C [-] is average concentration of droplets in water and C* [-] is concentration of droplets in feed.抄録全体を表示PDF形式でダウンロード (953K) -
倉前 正志, 田中 達夫1975 年 1 巻 6 号 p. 583-588
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe mechanism of heat transfer was analyzed by separating the heat transfer region in a rotary dryer into two parts : the period of material elevation on flights and the period of free fall from the flights. As a result, the volumetric heat transfer coefficient, Ua, for the rotary dryer was represented as a function of several dimensionless groups. The theoretical relationship thus obtained is discussed with respect to each parameter and compared with past experimental data. In particular, it is pointed out that there might be some questions in a conventional correlation method in which Ua is to be inversely proportional to the diameter of the rotary dryer.抄録全体を表示PDF形式でダウンロード (925K) -
松田 仁樹, 架谷 昌信, 杉山 幸男1975 年 1 巻 6 号 p. 589-593
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe thermal conductivities under the crystal transformation of ammonium chloride and the thermal decomposition of sodium bicarbonate and gypsum (natural and chemical) were measured by applying the principle of D. T. A. method. The thermal conductivities of these materials under the reaction were compared with those in non-reaction state.
It was found that the thermal conductivities under the reaction were smaller than those in non-reaction state. The ratios of the former to the latter were : 2030% for sodium bicarbonate, 2530% (natural) and 3035% (chemical) for the first-step decomposition of gypsum, 3545% (natural) and 3540% (chemical) for the second one of gypsum, and 7885% (in the case of heating) and about 80% (in the case of cooling) for ammonium chloride, respectively, in the range of this experiment.抄録全体を表示PDF形式でダウンロード (852K) -
杉山 幸男, 新井 紀男, 久米 勤, 志賀 昭雄1975 年 1 巻 6 号 p. 594-598
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーDrying of solid particles in an inclined fluidized bed was investigated. Calculated results based on several assumptions showed fairly good agreement with the experimental data obtained by drying brick and silica-sand particles with air.
It was found that the addition of mechanical vibration increased the drying rate and its effect can be evaluated from the increase in air velocity.抄録全体を表示PDF形式でダウンロード (2753K) -
城塚 正, 川瀬 義矩1975 年 1 巻 6 号 p. 599-604
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe effect of non-Newtonian behavior on the formation of drops is discussed. The formation of non-Newtonian fluid drops in Newtonian fluids and Newtonian fluid drops in non-Newtonian fluids was examined experimentally.
The model of drop formation in non-Newtonian fluid systems was studied. The model considers the drop formation to take place in two stages, the expansion stage when the drop inflates at the nozzle tip and the detachment stage when the drop rises, forms a neck and finally gets detached from the nozzle.
A comparison of the model with experimental data shows good agreement, and it is proved that the model can predict the drop volume in non-Newtonian fluid systems without difficulty.抄録全体を表示PDF形式でダウンロード (795K) -
西中 誠幸, 諸岡 成治, 加藤 康夫1975 年 1 巻 6 号 p. 605-610
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe gas bubble holdup, apparent longitudinal dispersion coefficient of solid particles and intermixing velocity of solid particles through the baffle were measured for the fluidization of air-FCC catalyst system in four and eightsteps fluid beds (12 and 19 cm i. d.) equipped with horizontal baffles.
The gas bubble holdup increases with decreasing free area of baffle and with increasing number of baffles. The apparent longitudinal dispersion coefficient of solid particles decreases with decreasing free area of baffle and with increasing number of baffles. Furthermore, the intermixing velocity of solid particles is correlated with the Froude number for each type of baffle.抄録全体を表示PDF形式でダウンロード (872K) -
宮下 尚, 佐伯 和男, 植田 洋匡, 水科 篤郎1975 年 1 巻 6 号 p. 611-615
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーA theoretical and experimental investigation was made of the flow mechanisms and heat and mass transfer coefficient in a liquid film flowing over a horizontal cylinder. The theory is based on a momentum-integral equation. In the experiment the distributions of the wall shear stress and local mass transfer coefficient as well as the overall mass transfer coefficient were measured by an electrochemical method. In the smaller Reynolds number region (Re <550) the predictions and experimental results agree very well. As the Reynolds number increases (Re>550), the effects of liquid-jet flow near the front stagnation point and violent wavy motions near the rear stagnation point increase local values of wall shear stress and mass transfer coefficient and cause deviation from the predictions.
As to the overall transfer coefficient, the analogy between heat and mass transfer is confirmed with the exponent of the Prandtl (or Schmidt) number equal to 1/3. The exponent of the Reynolds number is 1/9 (theoretically) in the smaller Reynolds number region and increases with the Reynolds number, approaching 1/3.抄録全体を表示PDF形式でダウンロード (693K) -
井上 勝利, 中塩 文行1975 年 1 巻 6 号 p. 616-620
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーExtraction rate of hydrochloric acid by drop of N-lauryl (trialkylmethyl) amine was measured under various conditions. The diluents used were n-hexane, cyclohexane and tetralin. According to the experimental results of extraction equilibrium, not only simple alkylammonium salt but also aggregates of salt could exist in the organic solution phase.
The mechanism of extraction rate accompanied by chemical reaction at the surface of a drop, which will possibly become important for the study of the extraction of heavy metal ions, was theoretically analyzed by the model proposed by Handlos and Baron, which takes account of turbulent diffusion in a drop and seems to be fairly applicable to this system. The experimental data were compared with the results of this theoretical analysis.
It was found that the change of extraction rate by total amine concentration in a drop was qualitatively explained by these theoretical results.抄録全体を表示PDF形式でダウンロード (747K) -
田畑 則一, 森 貢1975 年 1 巻 6 号 p. 621-627
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe characteristics of ozone absorption into water were clarified in the case of water-jet-air-suction ejectors. The ozone absorption efficiency η was measured under various conditions. Then the equilibrium absorption efficiency ηeq. and the value KLat0, which was the product of the overall capacity coefficient of mass transfer (KLa) and the contact time (t0), were calculated from the experimental values of η by theoretical analysis based on a practical model. The value KLat0 indicating the case of mass transfer is explained in relation to the characteristics of ejector action.抄録全体を表示PDF形式でダウンロード (3347K) -
〓田 隆, 高野 清南1975 年 1 巻 6 号 p. 628-633
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーIn this paper we propose a numerical method to solve the nonlinear simultaneous equations of many unknowns, i. e. the general equations of equilibrium for gaseous chemical reactions involving electron, ions, liquids, and solids. The method insures convergence of the iterative calculations by the following procedures. First, the components involved in the total system are ranked in proportion to a certain priority, then the equilibrium of the partial system consisting of higher-ranked components is solved. Next, the residual component of the highest rank is added to the partial system and the partial system is solved. In this manner, the total system is solved by adding residual components successively into the partial system. For example, the equilibrium of a typical working gas for a combustion-driven MHD generator is solved by this method. The condensing conditions of potassium compounds, etc., has clarified. The components of the combustion gas that must be considered for the MHD generator are discussed, and it is pointed out that ions of NO2- and CO2- which were not considered in past calculations cannot be neglected because they are dominant at temperatures below about 2, 400°K.抄録全体を表示PDF形式でダウンロード (996K) -
高橋 正博, 竹内 寛, 恩田 格三郎1975 年 1 巻 6 号 p. 634-637
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe diffusivities of carboxylic acid over the complete range of composition for aqueous alcohol solutions were measured by use of a diaphragm cell with a Millipore filter. The solutes studied were acetic, propionic and n-butyric acids and the alcohols used were methanol, ethanol and n-propanol. Experimental results were correlated with an equation based on the absolute rate theory approach within a deviation of±7%.抄録全体を表示PDF形式でダウンロード (581K) -
凝集 2 次粒子の粒度分布山本 英夫, 菅沼 彰, 森 芳郎1975 年 1 巻 6 号 p. 638-643
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーParticle size distribution of airborne dust from the micro-fluidized bed was measured by cascade impactor and by Coulter counter method. Frequency distribution of collected dust at each stage in a cascade impactor was measured by Coulter counter method. Coulter counter method can measure size distribution of primary particles of dust, because an aggregated dust particle disperses into primary particles in liquid. Cascade impactor is very effective for measuring size distribution of aggregated dust particles, because it can collect an aggregated particle as it is. The results of the experiments show the following : Airborne dust from a fluidized bed is mostly aggregated. The degree of agglomeration changes widely according to conditions of generation. The larger the carrier gas velocity in a pipe from a generator to a measurement system the more airborne dust disperses. Where pipe diameter is 1.5 mmφ and carrier gas velocity is 28 m/sec, airborne dust disperses almost completely and the particle size distribution measured by cascade impactor closely corresponds to the result by liquid-phase method.抄録全体を表示PDF形式でダウンロード (815K) -
高橋 武士, 金川 昭1975 年 1 巻 6 号 p. 644-649
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーThe single-fibre collection efficiency of fibrous filters with an external electric field is determined from calculations of the particle trajectory. The calculations are performed for the case in which an electric field is applied parallel to the direction of flow velocity, where the interference effect of neighboring fibres is considered. The influence of various parameters on the collection efficiency is discussed. These are the interception parameter, the fibre volume fraction and the specific dielectric constant of the fibre. Consequently, the following conclusions are obtained.
(1) The collection efficiency due to the simultaneous action of interception and electrical force is smaller than the sum of collection efficiencies due to the individual action alone.
(2) When the specific dielectric constant of the fibre is equal to unity, the collection efficiency is obtained analytically by the concept of solenoidal force field on particles.抄録全体を表示PDF形式でダウンロード (1106K) -
海野 肇, 太田口 和久, 井上 一郎, 城塚 正, 川瀬 義矩, 田中 宏史, 藤井 哲, 宮武 修, 岩田 隆逸, 佐藤 雄一, 中村 ...1975 年 1 巻 6 号 p. 650-662
発行日: 1975/11/10
公開日: 2009/10/21
ジャーナル フリーPDF形式でダウンロード (3979K)
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