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  • 小泉 昌明
    鉄と鋼
    1988年 74 巻 2 号 215-223
    発行日: 1988/02/01
    公開日: 2009/05/29
    ジャーナル フリー
  • 堀部 富雄, 峰村 茂樹, 高木 通介, 中西 国男, 石野 亨
    鋳物
    1969年 41 巻 12 号 959-967
    発行日: 1969/12/25
    公開日: 2012/10/03
    ジャーナル フリー
      In this investigation, blast temperature of cupola was varied systematically with use of two kinds of coke, differed in apparent specific gravity and ash content, corresponding to each supposed optimum cupola operating conditions. The effects of the blast temperature and coke on operating conditions of cupola and also on the properties of melt were investigated basically. It was summarized from the results obtained that as the blast temperature was raised melting and carburizing rate were increased, silicon and metal loss were decreased, and tapping temperature was raised.
      The higher the blast temperature raised, the more the properties of melt were depended on cupola melting conditions. Simultaneously the effect of coke on the melting condition, however, was decreased. For preheating the blast, externally fired hot blast system using towngas as fuel with heat exchanger was utilized.
      From the stand point of heat balance this externally fired hot blast system had been found sufficiently to be paid economically in cupola operation.
  • 大口 良人, 吉田 治夫, 伊藤 隆惟, 後藤 信男
    繊維工学
    1968年 21 巻 10 号 P701-P704
    発行日: 1968/10/20
    公開日: 2010/09/27
    ジャーナル フリー
  • 大中 逸雄
    鋳物:講演大会講演概要集
    1993年 123 巻 1
    発行日: 1993年
    公開日: 2022/03/01
    会議録・要旨集 フリー
  • 平塚 貞人
    鋳造工学
    1997年 69 巻 8 号 690-698
    発行日: 1997/08/25
    公開日: 2014/12/18
    ジャーナル フリー
  • 石野 亨, 遠藤 芳香, 鎌田 祐次, 橋本 克洋
    鋳物
    1966年 38 巻 11 号 754-762
    発行日: 1966/11/25
    公開日: 2012/10/10
    ジャーナル フリー
      Generally, gas burner and oil burner are thin gray iron castings.
    For machining and boring of burner hole, thin iron castigs should contain high corbon and silicon, and its structure is preferable to be coarsy flake graphite.
    Even in normal combustion, gas and oil burners are exposed to high temperature up to 500°C, and also exposed to atomospheric gas which contains a considerable amount to carbon monoxide, carbon dioxide, and sulphur.
    Under these conditions mentioned above, thin iron castings for gas and oil burner has much defects and problems for corrossion and growth.
    We have surveyed most dependable iron castings for a year to solve these problems to increase corrosion-resistance and to prevent growth.
    For testing sample, commercial thin gray iron castings, meehanite metal, ductile cast iron, malleable cast iron, low alloy cast iron, and aluminized cast iron were used.
    As to the heat-resisting property, these samples were tested in an atmosphere of mixed town gas, and on the other hand, these samples were also tested in air and in the atomosphere which contains much sulphur for the comparision.
    Brief items of testing results were as follows:
      a) As to the heat-resisting property, ductile cast iron is most preferable, however, malleable cast iron shows the same or inferior property to gray cast iron.
      b) Alminized cast iron and those which contains high silicon up to 5% show excellent heat-resisting property.
      c) Micrographic section of samples heated in atomospheric air shows the thinest oxide zone, and those heated in the atomosphere of town gas and high sulphur content show a considerable thick oxide zone.
      d) Oxidation loss heating in the atomospheric air is the most, and easily to be scaled.
  • 第18報 セルロースの膨潤溶解過程の顕微鏡的考察
    越沢 徳美
    繊維学会誌
    1959年 15 巻 2 号 95-101
    発行日: 1959/02/10
    公開日: 2008/11/28
    ジャーナル フリー
    The comparative investigations on the behaviors of cellulose in phosphoric acid, in xanthation, and in acetylation were carried out microscopically. The similarity of swelling state was noticed in phosphoric acid and xanthation. The behavior of cellulose in acetylation, however, differed from those in the former two reagents, The fact may be ascribed to the higher rate of degradation and solubilization of cellulose than the rate of access (i. e. Penetration and esterification) of acetylating reagent. It was noticed that the susceptive “weak points” in outer layer of fiber were the cause of “baloon like swelling” in phosphoric acid or xanthation, and they also caused cracks perpendicular to fiber-axis in acetylation. It was also stated that the swelling test with phosphoric acid is a convenient method to know the inhomogeneity of accessibility in interfiber or intra-fiber and the reaction “Processability” (cf. R. C. Blume et al.; Tappi, 37, 28 (1954)) of dissolving pulp in xanthation and acetylation.
  • サルファイト蒸解,熱アルカリ精製およびハイポクロライト漂白工程における木材繊維の形態的変化
    祖父江 寛, 越沢 徳美, 坪島 和彦
    繊維学会誌
    1957年 13 巻 12 号 842-851
    発行日: 1957/12/10
    公開日: 2008/11/28
    ジャーナル フリー
    With the same samples described in parts V, VI and VII, the morphological transformation of wood cellulose fibers during sulfite cooking, hot alkaline purification and hypochlorite bleaching was investigated by modifying Heide's phosphoric acid method. (K. Heide, Faserforsch. u. Textiltechn., 3, 469 (1952)).
    The swelling and dissolution state of cellulose fiber at each pulping stage in 78, 79 and 80% H3PO4 was observed by phase-contrast microscope. Simultaneously, the determination of haze value of cellulose solution in 79.5% H3PO4 was also carried out as a newly proposed method by us for estimation of cellulose reactivity.
    The results ware as follows:
    1. The swelling and dissolution state of sulfite-cooked cellulose fiber (further delignified with NaClO2)in phosphoric acid was improved with decrease in its average D. P. during the sulfite cooking.
    2. As a result of subsequent chlorination, hot alkaline purification and hypochlorite bleaching, the state of swelling and dissolution of cellulose was further improved. The final hypochlorite bleaching, however, did not contribute too much to its improvement as the former did. Though the influence of DP of the original sulfite cooked pulps upon the state of swelling and dissolution of cellulose in phosphoric acid was gradually decreased with the subsequent pulping processes, its effect was still slightly observed in final bleached pulps.
    3. The determination of the haze value of cellulose solution in 79.5% H3PO4, newly proposed by us, may be a good method for quantitative estimation of reactivity of cellulose.
    The results by this method was very much consistent with that of microscopic observations, and also with the results reported in Part VII on clogging constant (Kw) of viscose prepared from these samples.
  • 和泉 一志, 石井 香織, 安藤 淳平
    日本土壌肥料学雑誌
    1995年 66 巻 1 号 7-12
    発行日: 1995/02/05
    公開日: 2017/06/28
    ジャーナル フリー
    The potassium silicate fertilizer was produced from Chinese Daido coal ash by calcining at 850-950℃ for 10-50 min with potassium carbonate, calcium hydroxide and magnesium hydroxide. The products contained 21×10^<-2>kg kg^<-1> K_2O, 0.7-5.5×10^<-2>kg kg^<-1>MgO, and 17.5-12.0×10^<-2>kg kg^<-1> CaO. The citric solubility of K_2O exceeded 90% while 0.5 mol dm^<-3>HCl solubility of SiO_2 reached 90% when the product calcined at 950℃ for 50 min contained 3×1O^<-2>kg kg^<-1> MgO and 14.5×10^<-2> kg kg^<-1> CaO. Major compounds in the products were K_2O・Fe_2O_3・2SiO_2 (KFS_2) containing about 30×10^<-2>kg kg^<-1> K_2O・Al_2O_3・2 SiO_2 (KAS_2), which may form a compound KAS_2・2 KFS_2. Considerable amounts of compounds K_2O・Al_2O_3 (KA), K_O・CaO・SiO_2 (KCS), and 3CaO・MgO・2SiO_2 (C_3MS_2), and a small amount of insoluble MgO・Fe_2O_3 (MF) were also formed.
  • 第7報 サルファイト蒸解度の木材繊維素の重合度分布変化および硫化反応性におよぼす影響
    祖父江 寛, 越沢 徳美
    繊維学会誌
    1957年 13 巻 2 号 81-86
    発行日: 1957/02/10
    公開日: 2008/11/28
    ジャーナル フリー
    The influence of the variation in average D. P. of unbleached pulps upon the change of the molecular weight distribution of wood cellulose during pulping and ageing process was investigated by using the same samples described in Parts V and VI. From each unbleached pulp with various average D. P., were prepared the bleached pulp with approximately same average D. P. level (ca. 900) and same α-cellulose content (ca. 92%), from which were prepared also their alkali cellulose with approximately same average D. P. level (ca. 400) respectively (cf Parts V. VI). The clogging constant (Kw) of the viscose from each alkali cellulose was determined by normal method (cf. Part V), and also the reactivity of each bleached pulp in emulsion xanthation, i.e. “Resistance to Mercerization”, (cf. Part III), and “Resistance to Xanthation”, (NaOH: 140g/l, CS2 added on the basis of cellulose 40%, 70%, 100%, 140%) were determined by modification of Bartunek's method.
    The results were as follows:
    1, Sulfite cooking, hot caustic purification, hypochlorite bleaching and alkali-ageing, these four stages have all contributed to the uniformity of the molecular weight distribution of wood cellulose. The influence of the variation in average D. P. of unbleached pulp upon the polymolecularity of the bleached pulp and also their alkali cellulose with approximately same average D. P. level respectively, was found comparatively small, however, under more detailed observation, it was found that the content of higher molecule weight portion in each bleached and also aged samples had increased with increase in the average D. P. of original unbleached pulp.
    2, The influence of the variation in average D. P. of unbleached pulp upon the reactivity in emulsion xanthation of each bleached pulp with approximately same average D. P. level, was found so little, that both “Resistance to Mercerization” and “Resistance to Xanthation” were only dependent upon the average D. P. of bleached pulp. These results were quite similar with that previously reported. (cf Part III).
    3, On the other hand, the clogging constants of the viscose prepared from each alkali cellulose with same D. P. level (ca. 400) have increased more or less proportionally with the increase in average D. P. of original unbleached pulp.
    Therefore it is dangerous to estimate directly the suitability of bleached pulp for viscose, only by Bartunek's method. It could be thought more advisable to use, besides emulsion xanthation method, the method of morphlogical investigation upon the behavior of wood cellulose by modification of Heide's method under specialized xanthation condition, e. g. under the addition of insufficient amount of CS2 to the normally prepared alkali cellulose.
  • 永田 重雄, 椙山 太郎
    電気製鋼
    1957年 28 巻 6 号 431-441
    発行日: 1957/11/30
    公開日: 2009/05/25
    ジャーナル フリー
  • 武 達男
    電気学会論文誌D(産業応用部門誌)
    1998年 118 巻 4 号 431-436
    発行日: 1998/04/01
    公開日: 2008/12/19
    ジャーナル フリー
  • 平竹 進, 中西 洋一, 山田 博之, 吉田 浩二
    電気製鋼
    1984年 55 巻 1 号 74-81
    発行日: 1984/01/15
    公開日: 2009/05/25
    ジャーナル フリー
    An industrial scale new melting process, named Plasma Progressive Casting Furnace (PPC-F) was designed and constructed by Daido Steel Co., in Daido's Hoshizaki Plant. This process is suitable for making a titanium primary ingot (VAR electrode) directly from grain sponge and/or various shapes of scraps without requirement for compaction and electrode fabrication. The furnace has six plasma torches circling around the water cooled crucible. Plasma arcs are controlled by magnetic field which also makes molten pool rotate. Materials are fed and melted continuously and solidified ingot is withdrawn progressively.
    This process has a distinctive advantage of efficient utilization of small sized scraps which is difficult to remelt in usual VAR process and a high reduction of the melting cost is accordingly expected.
  • 光井 友三郎
    鋳物
    1962年 34 巻 7 号 520-530
    発行日: 1962/07/25
    公開日: 2013/03/05
    ジャーナル フリー
      Studies on pin holes caused by moulds have been reported by many investigators. But, quantitative evaluation of pin holes, effects of vent holes in the moulds and the experimental relations between the drying depth in the moulds and the casting thicknesses have been remained uncleared up to the present. So, the author has investigated on the pin holes caused by the moulds applying simple plate-like specimens.
      The results obtained were as follows ;
      (1) The numbers of pin holes appearing on some cut surfaces of the specimens were counted to estimate the intensity of pin holes. This seemed to be more reliable than any other method tried before.
      (2) The shapes of the pin holes were related to the drying degree of the mould surface ; pipy shape by green sand mould and conical type by drying mould. These should be investigated and discussed refering to the velocity of the heat absorption on the mould surface and gas pressure.
      (3) The intensity of pin holes was related strongly to the drying degree of mould. The pin hole was not occurred in the casting if the mould was dried perfectly.
      (4) The maximum point of pin hole intensity was appeared at the casting of 36mm thickness in the present investigation.
      (5) Technical trials of setting vent holes in the moulds to improve the pearmiability of the mould seemed to be useless by the results of this investigation.
  • 宮崎 勢四郎
    鋳物
    1963年 35 巻 3 号 137-148
    発行日: 1963/03/25
    公開日: 2012/10/22
    ジャーナル フリー
      Several subjects on the production and the industrial properties of low Mn-Mo steel castings to be used for wear abrasive part were investigated. The results obtained were as follows :
      (1) Melting and refining operations are not so difficult compared to that of carbon steel castings.
      (2) Hardenability is good.
      (3) Machinability is better than that of high carbon steel castings.
      (4) Weldability is not so good as carbon steel castings, but is possible.
      (5) Volume of riser is a little bigger than that of carbon steel castings.
      (6) Defects such as shrinkage and hot tear are rather few.
      (7) Transition temperature of brittleness at low C% range becomes low by homogenigation.
  • 竹内 仁司, 小長 英二, 柏谷 昌昭, 金岡 祐司, 仁科 拓也, 大野 聡, 後藤 精俊, 小林 元壮, 荒田 敦, 真鍋 康二, 川口 憲二, 牧野 泰裕, 河野 宏
    医療
    1991年 45 巻 12 号 1199-1204
    発行日: 1991/12/20
    公開日: 2011/10/19
    ジャーナル フリー
    胆嚢摘出術は15cm前後の正中切開にて行われるのが一般的であるが, 今日手術創を可能な限り小さくし, 患者の肉体的精神的苦痛を軽減しようとする傾向がある. そこで最近経験した右肋弓下小切開胆嚢摘出例3例, および腹腔鏡下胆嚢摘出症例7例を検討した. 小切開胆嚢摘出術における皮膚切開は肥満度に従って長くなったが, 腹腔鏡下胆嚢摘出術では肥満による影響は比較的少なかった. 手術時間は両術式間に有意差を認めなかった. 両術式ともに従来の胆嚢摘出術に比較し術後の疼痛が少なく, 回復美容上共に優れていたが, 特に腹腔鏡下胆嚢摘出術はより優れていた. 合併症は小切開胆嚢摘出術では認められなかったが, 腹腔鏡下胆嚢摘出症例では1例に認められた. 重篤な合併症を防ぐためには術前画像診断による適応を正しく判断するとともに, 摘出困難例には早期に開腹による胆嚢摘出術に切り替えることが最も重要であると考えられた.
  • 平山 武司, 矢後 和夫
    ファルマシア
    2002年 38 巻 10 号 951-955
    発行日: 2002/10/01
    公開日: 2018/08/26
    ジャーナル フリー
  • 尿中尿酸結晶および尿酸結石の溶解度による尿アルカリ化療法の検討
    飯尾 昭三, 西尾 俊治, 岩田 英信, 竹内 正文
    プリン・ピリミジン代謝
    1991年 15 巻 2 号 71-76
    発行日: 1991年
    公開日: 2012/11/27
    ジャーナル フリー
    前立腺肥大症と膀胱結石(尿酸2水化物結石)を合併した64歳の腎性低尿酸血症の1例を報告し,結石再発予防に必要な尿アルカリ化療法にっいて検討した.
    4例の患者から得た無水尿酸結石の
    溶解
    度を測定し,尿中尿酸結晶(尿酸2水化物)および市販の無水尿酸結晶の
    溶解
    度と比較した.無水尿酸結石の
    溶解
    度は無水尿酸結晶よりやや高く,尿中尿酸結晶の
    溶解
    度は無水尿酸結晶の2.1~2.9倍高い値を示した.尿中ではまず最初に2水化物結晶が析出し,それが無水結晶に変化する可能性が示唆されており,尿酸結石の再発予防には尿中尿酸結晶(尿酸2水化物)の
    溶解
    度,結石
    溶解には無水尿酸結石の溶解
    度を目安にして尿のアルカリ化療法を行うことが適正であると考えられた.
  • 駒田 充生, 竹内 誠
    日本土壌肥料学雑誌
    1999年 70 巻 6 号 804-807
    発行日: 1999/12/05
    公開日: 2017/06/28
    ジャーナル フリー
  • 第3報 サルファイトパルプの硫化反応性について 第4報 蒸解,漂白及び老成のアルカリ繊維素重合度分布に及ぼす影響
    祖父江 寛, 越沢 徳美
    繊維学会誌
    1956年 12 巻 7 号 448-458
    発行日: 1956/07/10
    公開日: 2008/11/28
    ジャーナル フリー
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