All issues
Successor
Volume 13 (1967)
- Issue 6 Pages 303-
- Issue 5 Pages 239-
- Issue 4 Pages 183-
- Issue 3 Pages 121-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 13, Issue 4
Displaying 1-13 of 13 articles from this issue
- |<
- <
- 1
- >
- >|
-
Norikatsu Hamamura1967 Volume 13 Issue 4 Pages 183-186
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESS1) An apparatus for the field test of cyanide in industrial wastes was prepared by electric percholator for warmer and air pump for aeration. 2) Twenty ml. of sample is warmed to 65°C., and 10 ml. of 5% H3PO4 is added. After aeration for 15 min., cyanide gas is absorbed in 10 ml. of 1/30 N NaOH. Eighty to hundred per cent of cyanide is recovered by this procedure. 3) Adequate amounts of diphenylcarbazone-Hg (DC-Hg) reagent are added to CN absorbed alkaline solution. After 5 minutes, a little excess of DC-Hg reagent is filtered off, and developed colour intensity is determined. For the field test, artificial pigment is used for standard colour solutions which is made of auramine-p-rosaniline mixture. In the case of quantitative determination in laboratory, 18.46μg/ml. of diphenylcarbazone in 1/30 N NaOH is used for standard colour solution, which corresponds to 2.0 ppm. of CN, and the developed colour is determined spectrophotometrically at 490 mμ.View full abstractDownload PDF (551K) -
Seiichi Okui, Mitsuru Uchiyama, Michinao Mizugaki, Tokuo Yoshida1967 Volume 13 Issue 4 Pages 187-190
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSAttempt was made to offer a standard physico-chemical method of detecting and identifying hemp plant or its extract by comparing the applicabilities of such methods as color reactions, thin-layer chromatography, gas-chromatography etc. Thin-layer of silicagel impregnated with dimethylformamide could efficiently separate three major components, cannabinol (CBN), cannabidiol (CBD), tetrahydrocannabinol (THC), and the gas liquid chromatography with the stationary liquid of SE-30 was satisfactorily employed for detection and determination of each component. Further, using these methods some fifteen samples prepared from hemps gathered in various areas of north eastern Japan were examined in comparison with those from the U.S.A. and Nepal. It was found that the relative amount of the three major components in the extracts of the hemp from Japan was almost consistant, namely THC was predominant. They were, however, different from those of the U.S.A. and nepal as well as from those of various origins already described in some foreign reports.View full abstractDownload PDF (470K) -
Tsutao Kurechi1967 Volume 13 Issue 4 Pages 191-196
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSPhotodegradation of BHA exposed to sunlight was studied. As a result, two types of oxidation products were separated in the form of white crystal. IR, MR, NMR and elementary analyses showed their chemical structures to be 2, 2'-dihydroxy-5, 5'-dimethoxy-3, 3'-di-tert-butyl biphenyl and 2', 3-ditert-butyl-2-hydroxy-4', 5-dimethoxy-biphenyl ether. Both substances are dimers with a molecular weight of 358, the former being a diphenyl compound with a melting point of 224, 5°and the latter being a diphenyl ether compound with a melting point of 78-79°.View full abstractDownload PDF (749K) -
Yasuko Harano, Otomatsu Hoshino, Tyunosin Ukita1967 Volume 13 Issue 4 Pages 197-201
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSChange of BHT added to soybean oil by ultra violet light irradiation was investigated. Soybean oil containing BHT was irradiated by ultra violet light at 50°, and residual BHT and peroxide values of soybean oil were followed. The amount of BHT added rapidly decreased during the induction period of increase of peroxide value. After the induction period, almost all of BHT disappeared. Decomposition products of BHT were extracted with acetnitrile and identified by thin layer chromatography and gas chromatography with 3, 5-di-tert-butyl-4-hydroxy-benzaldehyde (BHT-ald), 3, 5-di-tert-butyl-4-hydroxy-benzyl alcohol (BHT-alc), 3, 5, 3', 5'-tetra-tert-butyl-4, 4'-dihydroxy-1, 2-diphenylethylene (BE), 3, 5, 3', 5'-tetra-tert-butylstilbenequinone (SQ), and 2, 6-di-tert-butyl-benzoquinone (BQ), which were prepared by chemical oxidation of BHT. Among the products of irradiation of BHT, BE, BHT-alc and BQ still retained respectively 64%, 56% and 23% antioxidative activity of the original BHT.View full abstractDownload PDF (616K) -
Taro Komoda, Ryuzo Takeshita1967 Volume 13 Issue 4 Pages 201-203
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSSome nitrofuran derivatives used for food and drug in Japan were separated by thin-layer chromotography on both silica gel and aluminum oxide. Ether-acetone (3 : 2) is used as the solvent system for silica gel plates and aceton for aluminum oxide plates. The spots were detected in ultraviolet light and with a color reagent of sodium hydroxide. The tables of Rf values and the minimum amount of the derivatives detected were given. The method serves as an accurate qualitative determination of the nitrofuran derivatives, either singly or in mixtures.View full abstractDownload PDF (415K) -
Taro Komoda, Ryuzo Takeshita1967 Volume 13 Issue 4 Pages 204-206
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe use of thin-layer chromatography for qualitative analysis of srtificial sweeteners is described. By the ascending thin-layer chromatography using aluminum oxide containning cellulose powder, saccharin, cyclohexane sulfamic acid and dulcin are separated with n-butyl alcohol-pyridine-water or iso-propyl alcohol-aqueous ammonia and detected in ultraviolet light and with bromo thymol blue and p-dimethylaminobenzaldehyde reagents. The former solvent system is an excellent developer for the detection of the artificial sweeteners even in the presence of some food preservatives, such as salicylic acid, benzoic acid, p-hydroxybenzoic acid, sorbic acid, dehydroacetic acid, etc.View full abstractDownload PDF (452K) -
Masaharu Tonomura, Noboru Yamate, Kusuo Tsuji1967 Volume 13 Issue 4 Pages 206-212
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSTo confirm air pollution caused by automotive exhaust gas, it is necessary to know its relation to traffic densities and amount of air pollutions. Measurements of carbon monoxide, sulfur dioxide, nitrogen oxides and dust particles contained in atmosphere were carried out at Kasumigaseki and Itabashi, heavy traffic area in Tokyo, from Jan. to Dec., 1964 to explain the correlation between traffic densities and air pollution in urban atmospheric pollution. Concentrations of carbon monoxide and sulfur dioxide has a high degree coefficient of correlation to traffic densities, especially the concentration of carbon monoxide marks out the pollution caused by automotive exhaust gas in the atmosphere. From the correlation of traffic densities and resulting pollutants, we can presume the degrees of air pollution in future caused by automotive exhaust gas. The correlation between traffic densities and amounts of nitrogen oxides in atmosphere is not so remarkable. The amount of dust particles was partially varied with the other factors, such as meteorological and geographical conditions.View full abstractDownload PDF (805K) -
Yasuhiro Yamane, Motoichi Miyazaki, Hiroshi Iwase, Sanae Muramatsu1967 Volume 13 Issue 4 Pages 212-216
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe metals, Hg, Bi, Zn, Mn, Fe, Co, Ni, Cu, Pb, Sn and Cd, in water were extracted and separated at pH 3.0 and pH 9.0 with dithizone-chloroform solution. Each extracted solution was concentrated on the water bath and then back-extracted with 0.5 ml of 10 N-nitric acid. The separation and identification of metallic ions in the nitric acid solution were performed with thin layer chromatography using two kinds of developing solvents, that is, acetone : 3N-HCl (99 : 1) and n-butanol : benzene : 1N-HNO3 : 1N-HCl (50 : 46 : 2.7 : 1.3). The metals extracted at pH 3.0 were Hg, Bi, Cu, Zn, Sn and at pH 9.0 were Mn, Fe, Co, Ni, Cd, Pb, Zn, Sn. The excess of Fe3+ gave the interference in dithizone-extraction, but did not when NH2OH·HCl was added. The anions, PO3-4, BO3-3, Cl-, C2O2-4, SO2-4 and S2O2-3, did not interfer in dithizone-extraction up to 100ppm. The sensitivity of this method was about 0.5ppm of each metal.View full abstractDownload PDF (604K) -
Saburo Kanno, Syozo Fukui, Syoji Naito, Mikihiro Kaneko, Yoki Ose, Mas ...1967 Volume 13 Issue 4 Pages 217-218
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSIn barium chloranilate method for determining sulfur oxides in air or sulfate ion in water proposed by Bertolacini (Anal. Chem. 29, 281 (1957)), the absorbance is always constant in the range of pH 5.2∼7.9, while at pH 4.0 the absorbance is affected by the little variation of pH. Therefore, the buffer solution of pH 5.2 gives the more reliable results than that of pH 4.0.View full abstractDownload PDF (321K) -
Kazuo Morishita, Kiichiro Takahashi, Saburo Kanno, Syozo Fukui, Syoji ...1967 Volume 13 Issue 4 Pages 219-221
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSIn the measurement of sulfur oxides in air by alkaline filter paper method, the effect of the concentration of the portassium carbonate solution in preparing alkaline filter papers on the values of sulfur oxides was studied. Any difference between the values obtained by the papers treated with 50% and 30% potassium carbonate solution was never found. Furthermore, the correlation between the values of sulfur oxides obtained by conductometric method and alkaline filter paper method was studied, and it was found that there was a good correlation between twomethods. The equation of regression curve was as follows ; Y=0.0334X+0.0083 (Y : the concentration (ppm) of sulfur oxides obtained by conductometric method, x : the values (mg SO3/day/100cm2) of sulfur oxides obtained by alkaline filter paper method, ) This equation was similar to Wilsdson's formula.View full abstractDownload PDF (481K) -
Koku Matsumoto, Masatoshi Inoue, Keiko Komatsu, Michiko Totsuka1967 Volume 13 Issue 4 Pages 222-224
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe present investigation was undertaken to apply a theoretical method to the ventilation of the polluted air in rooms where carbon dioxide in rooms was not completely diffused. R is defined to be equal to C/C^-, where C^- and C are the average carbon dioxide concentration in a room and the carbon dioxide concentration near the ventilating opening, respectively. Assuming that the value of R depends only on time, the following difference equation can be obtained, R (t+h)=ah R (t)+(1-ah) b/(1-a) where a and b are constants (not equal to 0), and R (t+h) and R (t) refer to the value of R at the elapsed time (t+h) and t (hours), respectively. The linear relationship should be expected between R (t+h) and R (t), and really, in the case of room A (net capacity ; 19.66m3) and room B (net capacity ; 688.94m3), the following equations, R (t+h)=1.054 R (t)-0.084 correlation coefficient : 0.977 (h=10 min.), and R (t+h)=0.715 R (t)+0.111 correlation coefficient : 0.985 (h=10 min.) are obtained, respectively. Obtained values of constants a and b are discussed. Furthermore, applying the Fisher's orthogonal polynominal to these systems gives the following quadratic equations. R=0.937-0.38×10-2t-0.8×10-5t2 (room A) R=0.977-1.46×10-2t-9.9×10-5t2 (room B).View full abstractDownload PDF (435K) -
Tsuguo Kobayashi1967 Volume 13 Issue 4 Pages 225-230
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSA few technical methods for care and breeding of mice (dd-strain uniform-strain) were investigated. In an experiment with special reference to mice's body weights, mice of different weight were weighed and some mice were separated from the others. When the mice separated were moreover screened by the same way after two days, the uniform mice whose weights had shown little change were gotten. The condition of breeding and growth of mice was observed for a year. And two calculations of the weight-keep rate (the ratio of number of the mice with uniform weight to total number including the young mice) and the supply rate (the ratio of number of the mice which can be supplied with uniform weight to number of mice [female] in a cage) were contrived. As the capacity to breed mice and number of the mice which can be supplied with uniform weight may be guessed by obtaining these rates, a stable breeding and supply program will be easiy planned. In the present experiment, the weight-keep rate was about 0.7∼0.8 and the supply rate was about 2.0∼2.5 (only female).View full abstractDownload PDF (792K) -
Shunji Ishikura1967 Volume 13 Issue 4 Pages 230-237
Published: August 30, 1967
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDownload PDF (978K)
- |<
- <
- 1
- >
- >|