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Volume 14 (1968)
- Issue 6 Pages 289-
- Issue 5 Pages 237-
- Issue 4 Pages 177-
- Issue 3 Pages 123-
- Issue 2 Pages 57-
- Issue 1 Pages 1-
Volume 14, Issue 6
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1968 Volume 14 Issue 6 Pages 289-297
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDownload PDF (1086K) -
YUKIO NOMURA, TOSHIO TERASHIMA1968 Volume 14 Issue 6 Pages 298-302
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDetermination method of dehydoroacetic acid has been newly devised. The outline of this method is as follows. On being allowed to stand at a room temperature for two days in 10% sodium hydroxide solution, dehydroacetic acid was hydrolyzed quantitatively into one mole of acetone, one mole of carbon dioxide and two moles of acetic acid. The acetone, recovered by distillation, was determined by the iodine method. The mechanism of alkali hydrolysis and effect of the other food additives on the method were examined.View full abstractDownload PDF (578K) -
YUKIO NOMURA, TOSHIO TERASHIMA1968 Volume 14 Issue 6 Pages 303-307
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSUsing the determination method of dehydroacetic acid, presented in the previous report, recovery tests of dehydroacetic acid were carried out in various kinds of foods such as juice, ferment milk, "Azukian", "Miso", butter and margarine. Recovery was not less than 90% in all cases and accuracy within 3%. The result obtained was satisfactory.View full abstractDownload PDF (576K) -
AKIRA HAMADA, YASUKO TAKEDA, KIKUKO GOUKON1968 Volume 14 Issue 6 Pages 308-311
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSGas-liquid chromatography of 10 kinds of local anesthetics has been carried out on 1 m column packed with Daichrom A (washed Celite 545) coated with 1% silicone QF-1 or with Daichrom F (quartz powder) coated with 0.5% thermol No. 3. Each sample (in free base state) in ethanolic solution was introduced into gas chromatograph equipped with hydrogen flame ionization detector. The column with thermol No. 3 was preferred for the separation of all these drugs including dibucaine which had been difficult to detect with gas-liquid chromatography. Rapid and superior separation of a mixture of these drugs was also performed by thermol No. 3 column using a temperature gradient.View full abstractDownload PDF (503K) -
KENJI SATO, MITSURU OKA, NOBUO ITO1968 Volume 14 Issue 6 Pages 312-315
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSAn applicability of 60Co γ-ray irradiation for sterilization of polystyrene petri dishes was investigated. It was found that the petri dishes which were heavily contaminated by the spores of B. subtilis and B. pumilus could be perfectly sterilized with γ-ray irradiation at 2.5 M rad. Neither significant coloring and crazing of the irradiated dishes nor detrimental effect on their use in bacterial experiment was observed. From the observation of washing tests, it is supposed that the silicone on the surface of plastics is grafted with the plastics by means of the irradiation at 2.5 M rad.View full abstractDownload PDF (544K) -
NOBORU YAMATE1968 Volume 14 Issue 6 Pages 316-323
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe individual hydrocarbons such as methane, propane, 1-butene, 1, 3-butadiene, ethylene, and the mixtures of these hydrocarbons and nitrogen dioxide were irradiated with xenon lamp or solar light under static conditions. Major products resulting from photo-oxidation of them were identified by long-path infrared spectrophotometer. The concentrations of the products were determined by gas chromatography for hydrocarbons, and long-path infrared spectrophotometry for hydrocarbons and ethyl nitrate, and non-dispersive infrared analyzer for carbon monoxide, and colorimetry for formaldehyde, respectively. From these experiments, it was found that the saturated hydrocarbons are relatively stable to the photo-oxidation and yield small amounts of the products such as carbon monoxide, formaldehyde, ethyl nitrate, etc., whereas the unsaturated hydrocarbons which are highly reactive yield large amounts of the products.View full abstractDownload PDF (786K) -
SHOJI TAKITANI, MASAO SUZUKI, MIE YOSHIMURA, SHINOBU SATO, MICHIE SEKI ...1968 Volume 14 Issue 6 Pages 324-326
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSA method for the separation and identification of fourteen metal ions with dithizone extraction and thin-layer chromatography was investigated. From a solution containing various metal ions, dithizonates of Pd2+, Hg2+, Cu2+ and Ag+ were extracted with 0.1% CHCl3 solution of dithizone at pH 0-1, and then those of Bi3+, Cd2+, Co2+, Ni2+, Pb2+ and Zn2+ at pH 7-8, and lastly, those of Tl+, Fe2+, Mn2+ and Sn2+ at pH 9-10. The dithizonates extracted at pH 0-1 and 7-8 were separated on MN-silica gel S-HR layer by using CCl4-CH2Cl2-benzene (1 : 7 : 4) and each spot of the dithizonates was detected and identified directly by its characteristic coloration. The dithizonates extracted at pH 9-10 were reextracted with 20% HNO3, and free metal ions thus extracted were separated on the same kind of layer by using acetone-3N HCl (99 : 1) and detected by appropriate reagents. Each limiting amount for the identification of metal ions by this method was as follows : 0.2 ppm for Cu2+, Ni2+, Co2+, 0.3 ppm for Hg2+, 0.4 ppm for Pd2+, Ag+, Cd2+, 0.8 ppm for Zn2+, 3.0 ppm for Pd2+, 5.0 ppm for Bi3+.View full abstractDownload PDF (410K) -
TAKASHI TATSUNO, TSUYAKO SHIROTORI, MASAHIRO IWAIDA, IWAO KAWASHIRO1968 Volume 14 Issue 6 Pages 327-329
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSTwenty-nine commercial honeys and three collected honeys were tested for the contents of ash, copper and lead, the latter two of which were estimated with square-wave polarography. The mineral contents (ash) of all the honeys tested were within the range of 0-0.23%, and four of the commercial honeys were lower than 0.04% in the contents. Copper and lead contents of the honeys were within the ranges of 0-2.6 ppm and 0.2-6.3 ppm, respectively. It was proved that there was no correlation among the contents of ash, copper and lead in the honeys.View full abstractDownload PDF (404K) -
KOKU MATSUMOTO, MASATOSHI INOUE, TADASHI FUJITA, HIROMI TERADA1968 Volume 14 Issue 6 Pages 330-333
Published: December 30, 1968
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe present investigation was undertaken to apply theoretical methods to the ventilation of polluted air in room where carbondioxide was not homogeneously diffused. In the case of one dimensional diffusion, C is the concentration of carbondioxide at time nδT, and subscripts m, m+1 and m-1 denote space mδX, (m+1) δX and (m-1) δX, respectively, and superscript+denotes time (n+1) δT. Assuming that the concentration of carbondioxide depends on time and space as described in the previous paper, a following equation can be obtained : [numerical formula] where X is a distance from a source of evolution of carbondioxide, and D is a constant (not equal to 0). According to a Implicit difference analogue for the above equation, Taylor's expansion theorem, and Crank-Nicolson's method, a following equation can be obtained : [numerical formula] In the case of two dimensional diffusion, a following equation can be obtained as in the case of one dimensional : [numerical formula] where subscripts j, k ; j, k-1 ; j, k+1 ; j-1, k ; j+1, k denote space x=jh, y=kh ; x=jh, y=(k-1) h ; x=jh, y=(k+1) h ; x=(j-1) h, y=kh ; x=(j+1) h, y=kh, respectively. It was found that Crank-Nicolson's method is available for the theoretical study of natural ventilation of polluted air diffused heterogeneously in room as well as Schmidt's and Dusinberre's methods.View full abstractDownload PDF (439K)
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