{"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}
Pub Date : 1961-07-31DOI: 10.2109/JCERSJ1950.68.778_223
M. Tashiro, S. Sakka, M. Wada
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 )
有效地防止与捕获电子或正空穴相关的结构缺陷的形成。对于铈离子本身的价态变化，发现有小部分三价铈离子在辐照后发生Ce" hu - > [Ce"带正空穴]+ e-的反应而失去电子。TASHIRO, SUMi0 SAKKA and Naohiro SOGA Yogyo Kyokaishi(陶瓷协会学报，日本)，68,191(1960)在一个小的封闭空间，直径80mm的伽马射线剂量率分布。，高110mm，用15 × 6 × 1.72mm的普通平板玻璃小片作为剂量计测定。介绍了测量方法。讨论了玻璃剂量计体积小、使用方便、测量准确等优点。简要介绍了小型Co-60辐照器的结构，并在其中进行了测量。Megumi TASHIRO, Sumio SAKKA和Masamichi WADA Yogyo Kyokaishi (Journal of the Ceramic Association, Japan)， 68, 223 (1960) Rindone发现，在Li20.4SiO2组成的玻璃中加入少量的铂(0.01%)作为再加热的成核剂，将整个质量转化为由极小晶体组成的组装体(G. E. Rindone, J. Am)。陶瓷。Soc。(1958))。本文介绍了作者对含有Li 2O、MgO、Al202和sio2的玻璃的铂成核的研究结果。用抗弯强度来评价成核剂的作用。(1)最佳铂用量。将Li20 12.5、K20 2.5、Al202 4、SiO含量分别为81%(重量比)，铂含量分别为0、0.001、0.01、0.1%的玻璃制成尺寸为50 × 5 × 2.5mm的试样。以密度增加为参照，研究了铂浓度对分步热处理试样脱硝的影响。结果表明，0.01%的浓度足以完成脱硝。反氮化试样的抗弯强度随铂含量的增加而增加。考虑到铂的成本，作者(258)
{"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}
Pub Date : 1961-07-31DOI: 10.1246/NIKKASHI1898.63.4_556
M. Arakawa, E. Suito
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 )
S为1200a，平均值为1020a。有了这个值，汉堡矢量的强度估计为93-118 A，其中2.76 x 10“达因/厘米”。6001 000微克/厘米。分别为G和S。另一方面，我们也通过影子投射法估计了台阶高度平均为109 A。这与上面得到的伯格向量的强度是完全相同的数量级。Masafumi ARAKAWA和Eiji SUITO Kogyo Kagaku Zasshi (Journal of Chemical Society of Japan, Industrial Chemistry Section)， 63, 556(1960)用填充柱的空气渗透性测量了20至400 Mp的超细粉末的粒径，当我们离开Poiseuille和Knudsen流的共同贡献时，应用适当的解析方法可以计算出两种表面积。实验结果表明，由泊泽维尔流推导出的表面积代表二次聚集颗粒的几何面积，而由克努森流推导出的表面积与一次聚集颗粒的真实表面积相一致。从克努森项得到的各种粉末的表面积值与从电子显微镜数据计算得到的值一致。胶体金晶体片层单晶的螺旋生长[j] .电子显微镜学报，8,25(1960)在室温下用水杨酸还原氯化金水溶液制备的胶体金片层单晶，有时会在晶体的两个片层习惯面上同时出现一对生长螺旋。用电子显微镜复制技术证实了螺旋台阶晶体的三维构型。在大多数具有生长螺旋的晶体上，在螺旋的中心可以观察到一个小孔。弗兰克提出的伯格矢量与孔直径之间关系的方程也被用于胶体金晶体的研究。本文还对叠合生长台阶上出现的云纹条纹作了简短的讨论。(252)
{"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}
Pub Date : 1961-07-31DOI: 10.2109/JCERSJ1950.68.775_169
M. Tashiro, N. Soga, S. Sakka
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
暴露在高能辐射下的硅酸盐玻璃会形成三条可见的吸收带，类似于碱卤化物晶体中的F波段和v波段。铈的任务压制这些乐队的形成是在眼镜的作品学习spectrophotometrically 20 R /子2 / O, 10包,70 SiO /子2 /,和0.03 mol % CeO /子2 / (R /子2 / O:李/子2 / O, Na /子2 / O, K /子2 / O)。玻璃标本约0.1毫米的厚度与x射线辐照的42 kev, 10马,变化的吸收光谱范围230 - 600亩与贝克曼光电分光光度计测量。由于发现光的吸收变化不仅是由色心引起的，还有其他来源如铈离子的价变化引起的，因此通过在150℃下加热30 min将色心引起的吸收变化与其他来源分离开来;将加热引起的吸收强度的降低作为吸收强度的绝对变化，以形成色心。实验结果表明，三价铈离子对三种吸收带的抑制作用相同。因此，三价铈离子可以有效地防止与正极空穴捕获电子相关的结构缺陷的形成。对于铈离子本身的价态变化，发现辐照后有一小部分三价铈离子发生了Ce/sup +/ + h nu—STACe/sup +/与正空穴+ e/sup -/的反应而失去电子。(身份验证)«更少
{"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}
Pub Date : 1961-03-01DOI: 10.1002/MACP.1961.020440133
J. Furukawa, T. Saegusa, H. Fujii
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. Active 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. Aldehyde, 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. Es 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.
{"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}
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)
研究了伽玛射线或范德格拉夫电子辐照下LiF晶体在极紫外区的光学吸收。在基本吸收带的尾部发现了11.1 ev wss的新吸收带。在单电子中心假设下，估计该带的振荡强度约为0.25。描述了F波段光漂白过程中观察到的其他吸收行为，并对222m波段的性质进行了讨论。(认证)
{"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}
Pub Date : 1960-09-01DOI: 10.1080/03758397.1960.10857712
A. Hatanaka, M. Ohno
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 )
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