Bulletin of the Institute for Chemical Research, Kyoto University最新文献

{"title":"Spectrophotometric Method for Determination of Iron with Dibenzoylmethane","authors":"T. Shigematsu, M. Tabushi","doi":"10.1246/NIKKASHI1948.81.2_262","DOIUrl":"https://doi.org/10.1246/NIKKASHI1948.81.2_262","url":null,"abstract":"鉄のジペンゾイルメタン塩は, 鉄とジベンゾイルメタンが 1:3 の組成比の赤色結晶で, 酢酸ブチルに溶解して 320mμ および 410mμ 付近に吸収極大を示す。一方ジベンゾイルメタンの酢酸ブチル溶液は 343mμ に大きい吸収極大を有するが, 相当高濃度でなければ 400mμ 以上の波長では吸収を示さない。ジベンゾイルメタンおよびその鉄塩はともに水に溶解しないので, 試薬をアセトン溶液として加え, 加温して反応させたのち酢酸ブチルで抽出して, 410mμ の吸光度を測定して鉄を定量した。酢酸ブチル溶液での鉄塩の分子吸光係数は 17,OOO[l/mol・cm] で, この定量法の感度は高い。","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"29 1","pages":"260-261"},"PeriodicalIF":0.0,"publicationDate":"1961-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88075286","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}

{"title":"Mechanicel Strength of Polycrystalline Materials Propuced from Platinum Containing Glasses","authors":"M. Tashiro, S. Sakka, M. Wada","doi":"10.2109/JCERSJ1950.68.778_223","DOIUrl":"https://doi.org/10.2109/JCERSJ1950.68.778_223","url":null,"abstract":"S tive in preventing formation of either of those structural imperfections associated with trapped electrons or positive holes holes. As to the valency changes of cerium ion itself, a small part of trivalent cerium ions was found to loose their electron upon irradiation by the reaction Ce\" hu—> [Ce\" with positive hole] + e-. Use of Ordinary Plate Glass as a Gamma-Ray Dosimeter Megumi TASHIRO, SUMi0 SAKKA and Naohiro SOGA Yogyo Kyokaishi (Jo urnal of the Ceramic Association, Japan), 68, 191 (1960) The gamma-ray dose rate distribution in a small closed space, 80mm in dia., 110mm in height, was determined by the use of small pieces of ordinary plate glass, 15 x 6 x 1.72mm, as a dosimeter. The technique of the measurement was described. The advantageous features of the glass dosimeter, i. e., its small size, convenient usage, and preciseness in the measurement, were discussed. A brief description of the construction of a small Co-60 irradiator, in which the measurement was made, was appended. Mechanicel Strength of Polycrystalline Materials Propuced from Platinum Containing Glasses Megumi TASHIRO, Sumio SAKKA and Masamichi WADA Yogyo Kyokaishi (Journal of the Ceramic Association, Japan), 68, 223 (1960) Rindone found that a small amount of platinum (0.01%) introduced into a glass of the composition Li20.4SiO2 acts as a nucleating agent on reheating, converting the whole mass into an assembly consisting of extremely small crystals (G. E. Rindone, J. Am. Ceram. Soc., 41, 41 (1958)). This paper presents the results of the investigation of authors which covers the nucleation by platinum for glasses contaning Li 2O, MgO, Al202, and Si02. The bending strength was used for the evaluation of the effect of the nucleating agent. ( 1 ) Optimum amount of platinum. The glasses of the composition, Li20 12.5, K20 2.5, Al202 4, SiO, 81% by weight, added, respectively, with 0, 0.001, 0.01, 0.1% of platinum were formed into the specimens of the size 50 x 5 x 2.5mm. Taking the density increase as a reference the effect of the concentration of platinum on the devitrification of the specimens under a stepwise heat treatment was investigated. It was found out that 0.01% was sufficient for the completion of devitrification. The bending strength of the devitrified specimen increased with increasing platinum content. Taking into consideration of the cost of platinum the authors ( 258 )","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"12 1","pages":"258-258"},"PeriodicalIF":0.0,"publicationDate":"1961-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74593731","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}

{"title":"The Measurement of Particle Size of Ultra Fine Powders by the Air Permeability Method","authors":"M. Arakawa, E. Suito","doi":"10.1246/NIKKASHI1898.63.4_556","DOIUrl":"https://doi.org/10.1246/NIKKASHI1898.63.4_556","url":null,"abstract":"S 1200 A, while the mean value becomes 1020 A. With this value, the stength of the Burgers vector was estimated to be 93-118 A, where 2.76 x 10\" dyne/cm'. and 6001,000 erg/cm. were adopted for G and S respectively. On the other hand, we have also estimated the step height to be 109 A on an average by the shadow-casting method. This is of quite the same order as the strength of Burgers vector above obtained. The Measurement of Particle Size of Ultra Fine Powders by the Air Permeability Method Masafumi ARAKAWA and Eiji SUITO Kogyo Kagaku Zasshi (Journal of the Chemical Society of Japan, Industrial Chemistry Section), 63, 556 (1960) The particle sizes of ultra fine powders ranging from 20 to 400 Mp have been measured by the air permeability of packed columns, As we leave the co-operative contributions of Poiseuille and Knudsen flows, two kinds of surface areas can be calculated by the application of a proper analytical method. The experimental result suggests that the surface area deduced from the Poiseuille flow represents the geometric area of the secondary aggregated particles, while that deduced from the Knudsen flow is to be identified with the true surface area of the primary particles. The values of surface areas of various powders obtained from the Knudsen term agree with those calculated from electron microscopic data. Spiral Growth of Lamellar Single Crystal of Crystal of Colloidal Gold Eiji SUITO and Natsu UYEDA Journal of Electronmicroscopy, 8, 25 (1960) The lamellar single crystal of colloidal gold, prepaed by the reduction of aqueous solution of auric chloride with salicylic acid at room temperature, sometimes shows a couple of growth spirals, which appear at the same time on two lamellar habit surfaces of a cystal. The three dimensional configuration of the crystal with spiral steps has been confirmed by the replica technique of the electron microscopy. A small hole can be observed at the centre of the spiral on most of the crystals having growth spirals. The equation presented by Frank giving the relationship between the Burgers vector and the diameter of such a hole has also been examined with respect to the crystal of colloidal gold. A short discussion has also been made about the moire fringes which appeared on the superimposed growth steps. ( 252 )","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"15 1","pages":"252-252"},"PeriodicalIF":0.0,"publicationDate":"1961-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88255109","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}

{"title":"Critical Conditions for Brittle Fracture of Asphalts in Extension","authors":"R. Gotoh, H. Aida","doi":"10.2472/JSMS1952.9.331","DOIUrl":"https://doi.org/10.2472/JSMS1952.9.331","url":null,"abstract":"","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"2 1","pages":"250-251"},"PeriodicalIF":0.0,"publicationDate":"1961-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87428325","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}

{"title":"Behavior of Cerium Ions in Glasses Exposed to X-rays","authors":"M. Tashiro, N. Soga, S. Sakka","doi":"10.2109/JCERSJ1950.68.775_169","DOIUrl":"https://doi.org/10.2109/JCERSJ1950.68.775_169","url":null,"abstract":"Silicate glasses exposed to high-energy radiation develop three visible absorption bands sircilar to the F- and V-band in alkali halide crystals. The fanction of cerium in suppressing formation of these bands was studied spectrophotometrically in glasses with compositions of 20 R/sub 2/O, 10 BaO, 70 SiO/sub 2/, and 0.03 mole% CeO/sub 2/ (R/sub 2/O: Li/sub 2/O, Na/sub 2/O, K/sub 2/ O). Glass specimens of about 0.1 mm in thickness were irradiated with x rays of 42 kev, 10 ma, and changes of their absorption spectra in the range of 230 to 600 m mu were measured with the Beckman photoelectric spectrophotometer. As the absorption changes were found to be caused not only by color centers but also by other sources such as the valency change of cerium ion, the change due to color centers was separated from the others by heating the irradiated specimen at l5O deg C for 30 min; the decrease in absorption intensity by the heating was taken as the absolute change of the absorption dae to formation of color centers. The experimental results showed that trivalent cerium ions suppress development of the three absorption bands equally. Thus trivalent cerium ions are effective in preventing formation ofmore » either of those structural imperfections associated with trapped electrons of positive holes. As to the valency changes of cerium ion itself, a small part of trivalent cerium ions was found to lose their electron upon irradiation by the reaction Ce/sup 3+/ + h nu -- STACe/sup 3+/ with positive holel + e/sup -/. (auth)« less","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"22 Suppl A 1","pages":"257-258"},"PeriodicalIF":0.0,"publicationDate":"1961-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80265558","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}

{"title":"Inductive effect of polar substituents on carbon-hydrogen stretching vibrations of aliphatic hydrocarbons.","authors":"R. Gotoh, T. Takenaka","doi":"10.1246/nikkashi1948.81.10_1504","DOIUrl":"https://doi.org/10.1246/nikkashi1948.81.10_1504","url":null,"abstract":"脂肪族アルコ_ル,脂肪酸,アルキルプロミドおよび炭化水素のC-H伸縮振動数をフッ化リチウムプリズムで測定した。炭化水素を除く三つの系列では,メチル基の非対称および対称伸動数νは炭素鎖の長さ(メチル基の極性基からの距離)n の増加とともに減少し,n=6～7以上で炭化水素の振動数(炭素数によらず一定)と等しい一定値ν0を示す。この振動数変化は,各系列の最小の分子を除いてν-ν0=Ae-Bnで表わされる。ここでAおよびBは定数である。この実験式は,振動数変化が極性基の誘起効果に起因すると考えて理論的に導びき出され,定数0およびBの物理的意味づけがなされた。Aはメチル基の誘起電荷に起因する電気陰性度の増加およびC-H結合間隔の減少に関係した定数で,各極性基に特有な値をもつ。Bは炭化水素鎖内で隣り合う二つの炭素原子間の誘起電荷の比にのみ関係した定数で,極性基によらず,炭素鎖の形によって変化する。","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1961-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80469388","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}

{"title":"Isolation of (—)S-Allyl-L-cysteine from Garlic","authors":"Tomoji Suzuki, M. Sugii, T. Kakimoto, N. Tsuboi","doi":"10.1248/CPB.9.251","DOIUrl":"https://doi.org/10.1248/CPB.9.251","url":null,"abstract":"S-allyl-L-cysteine","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"3 1","pages":"416-416"},"PeriodicalIF":0.0,"publicationDate":"1961-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74555887","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}

{"title":"Preparation of Crystalline Polyaldehydes","authors":"J. Furukawa, T. Saegusa, H. Fujii","doi":"10.1002/MACP.1961.020440133","DOIUrl":"https://doi.org/10.1002/MACP.1961.020440133","url":null,"abstract":"We found that some organometallic compounds and metal alkoxides polymerized aldehydes including acetaldehyde, propionaldehyde and trichloroacetaldehyde (anhydrous chloral) to give crystalline polyaldehydes. Crystalline polyacetaldehyde was much less soluble in organic solvents than the amorphous one. \u0000 \u0000 \u0000 \u0000Active species of this polymerization was supposed to be metal alkoxides and the mechanism of polymerization was considered in connection with several synthetic organic reactions which involve metal alkoxides and carbonyl compounds. It was assumed that the coordination of aldehyde to the metal alkoxide was essential in propagation reaction which determined the stereospecificity of the polymer produced. \u0000 \u0000 \u0000 \u0000Aldehyde, namlich Acetaldehyd, Propionaldehyd und Trichloracetaldehyd (wasserfreies Chloral), polymerisieren unter dem Einflus einiger metallorganischer Verbindungen und Metallalkoxyde und geben kristalline Polyaldehyde. Kristalline Polyacetaldehyde sind in organischen Losungsmitteln weniger loslich als amorphe. \u0000 \u0000 \u0000 \u0000Es wird angenommen, das Metalloxyde die aktiven Anteile bei dieser Polymerisation sind. Der Polymerisationsmechanismus wurde im Hinblick auf einige organische, synthetische Reaktionen betrachtet, die mit Metallalkoxyden und Carbonylverbindungen verknupft sind. Es wird angenommen, das ein Koordinationskomplex des Aldehyds mit dem Metallalkoxyd bei der Wachstumsreaktion entscheidend ist und die Stereospezifitat des Polymerisats bestimmt.","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"8 1","pages":"325-325"},"PeriodicalIF":0.0,"publicationDate":"1961-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84367247","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}

{"title":"Optical properties of irradiated LiF crystals in the extreme ultraviolet.","authors":"R. Kato","doi":"10.1143/JPSJ.15.2111","DOIUrl":"https://doi.org/10.1143/JPSJ.15.2111","url":null,"abstract":"Optical absorptions of LiF crystals irradiated with gamma rays or Van de Graaff electrons were investigated in the extreme ultraviolet region. A new absorption band at 11.1 ev wss found at the tail of the fundamental absorption band. The oscillator strength of the band is estimated to be about 0.25 on the assumption of one electron center. Behaviors of other sbsorptions observed in the process of light bleaching of F bands, are also described and discussions are given on the nature of the 222 m mu band. (auth)","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1960-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86783704","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}

{"title":"Blätteralkohol (VIII) : Über das Vorkommen des trans-Isomeren in der natürlichen Blätteralkohol-fraktion","authors":"A. Hatanaka, M. Ohno","doi":"10.1080/03758397.1960.10857712","DOIUrl":"https://doi.org/10.1080/03758397.1960.10857712","url":null,"abstract":"S Blätteralkohol (VIII) : Über das Vorkommen des trans-Isomeren in der natürlichen Blätteralkohol-fraktion Akikazu HATANAKA und Minoru OHNO Bull. Agr. Chem. Soc. Japan, 24, 61 (1960) Es wurde aufgeklärt, dass die in Tee-blättern weit verbreitet vorkommende natürliche Blätteralkohol-fraction aus einem Gemisch der cis, trans-Isomere besteht, wobei bisher das cis-Isomere stark überwiegt. Darstellung von n-Hexin-1-olen und n-Hexen-1-olen Akikazu HATANAKA, Masayuki HAMADA und Minoru OHNO Bull. Agr. Chem. Soc. Japan, 24, 115 (1960) Die theoretisch möglichen sieben geometrischen Isomere von n-Hexen-1-olen und vier Stellungsisomere von n-Hexin-1-olen wurden in geometrisch reinen Formen erhalten. Die einigen davon waren zwar schon bekannt, aber in geometrischen Beziehungen sehen sie noch nicht ganz rein aus. Vier Isomere von n-Hexin-1-olen, die Ausgangsmaterialien zur Darstellung der transoder cis-Hexen-1-olen wurden in jeden Fällen von Acetylen aus über Acetylennatrium in flüssigem Ammmoniak synthesitiert. Besonders war diese Darstellungsmethode von 4und 5-Hexin-1-ol in der Ausbeute bedeutend überlegen als die bisherige. 2-, 3und 4-trans-Hexen-1-ol und 5-Hexen-l-ol wurden durch die Halbhydrierung der entsprechenden n-Hexin-1-olen mit Natrium in flüssigem Ammoniak gewonnen, während 2-, 3und 4-cis-Hexen-l-ol durch die Halbhydrierung in Gegenwart von Palladium-Bariumsulfat bei —15° geliefert wurden. Diese Alkohole wurden über 3, 5-Dinitrobenzoat gereinigt. Die Infrarotspektren von diesen Verbindungen ergaben die verschiedenen interessanten Probleme. The Absolute Configuration of trans-Caronic and cisand trans-Umbelluraric Acids H. M. WALBORSKY, Toshio SUGITA, Minoru OHNO and Yuzo INOUYE J. Amer. Chem. Soc., 82, 5255 (1961) Partial asymmetric syntheses of ( —)-, and (±)-trans-caronic acids were achieved by addition of ethyl diazoacetate to (—)-menthyl senecioate and by that of dimethyldiazomethane to (--)-dimenthyl fumarate respectively in 15.9% and 6.3% optical yields. These results provide cogent support for the use of Prelog-Cram model to this asymmetric synthesis. The addition of ethyl diazoacetate to ( —)menthyl a-isopropylacrylate gave (—)-cis-, and (—)-trans-Umbellularic acids. Bas( 255 )","PeriodicalId":9502,"journal":{"name":"Bulletin of the Institute for Chemical Research, Kyoto University","volume":"17 1","pages":"255-255"},"PeriodicalIF":0.0,"publicationDate":"1960-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73963862","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}