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Volume 11 (1965)
- Issue 4 Pages 213-
- Issue 3 Pages 153-
- Issue 2 Pages 81-
- Issue 1 Pages 1-
Volume 11, Issue 1
Displaying 1-13 of 13 articles from this issue
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[in Japanese]1965 Volume 11 Issue 1 Pages 1-5
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDownload PDF (603K) -
[in Japanese], [in Japanese]1965 Volume 11 Issue 1 Pages 6-33
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
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Ayako Murai, Takayuki Tani, Shoji Naito, Shozo Fukui, Saburo Kanno1965 Volume 11 Issue 1 Pages 34-39
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe factors for determining NO3--N in the presence of NO2--N were investigated. Two methods, i.e. the total value method reported by Yui and the aniline method, were taken up. The total value method was satisfactory, in which NO3--N was reduced to NO2--N in the presence of NO2--N as described by Lambert-Zitomer and as the result the value of the concentration of total NO2--N (the total value of NO3--N and NO2--N) was obtained, then the concentration of NO3--N was calculated by subtracting the value of the concentration of NO2--N in the sample solution from the value of the concentration of total NO2--N. Under the usual condition the second method, the aniline method, showed the considerable dispersion in the values of NO3--N obtained with the same sample solution. But the aniline method has been improved by the following modification of procedures. 1) On the diazotization of aniline, potasium bromide was added. 2) For the reduction of NO3--N to NO2--N, the condition reported by Lambert-Zitomer was used. 3) On coupling of aniline diazonium salt, α-naphthol was adopted as a coupling agent in the alkaline solution. (Received June 11, 1964)View full abstractDownload PDF (723K) -
Takeo Tamura, Tetsuya Totani, Hirofumi Harada, Yoko Nagano1965 Volume 11 Issue 1 Pages 40-45
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSFor the separation and identification of azo dyes having NO2 groups, thin-layer chromatography, alkali reaction and sodium borohydride reaction were successfully used. A clear separation of six kinds of dyes were achieved by thin-layer chromatography with aluminium oxide as adsorbent and toluene-petroleum ether (7 : 3) saturated with water as developing solvent. The position of maximum absorption of these dyes in alcoholic sodium hydroxide solution shifted to a longer or a shorter wavelength compared with toluene solution. The absorbance of Flaming Red was most stable, whereas that of Permanent Orange decreased after a few minutes. These dyes exhibited complicated changes in the absorption maximum and absorbance with sodium borohydride.View full abstractDownload PDF (587K) -
Gunichi Kurata, Tatsuo Sakai, Tatsuro Miyahara, Yoshio Ito1965 Volume 11 Issue 1 Pages 46-49
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe method for micro quantitative estimation of glucosamine (GA) and N-acetylglucosamine (NAGA) in the mixture was established. On application of the glucosamine estimation method of Levvy, et al., it was ascertained that NAGA could be determined without any obstruction even in the presence of acetylating agent. In this case, the equimolar amount of GA and NAGA gave the equal absorbancy at optimum pH by using the suitable quantities of the buffer and acetic anhydride. Therefore, using the acetylating agent, it is possible to determine the total quantity of GA and NAGA by means of this method. Without the acetylating agent, NAGA can be determined alone by the similar procedure. Thus, the quantity of GA corresponds to the difference of two values.View full abstractDownload PDF (494K) -
Gunichi Kurata, Tatsuo Sakai, Tatsuro Miyahara1965 Volume 11 Issue 1 Pages 50-55
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSChitin was submitted to oxidation with potassium permanganate in dilute solution of sulfuric acid, hydrochloric acid or sodium hydroxide. Both copper value and the amount of methylene blue adsorbed were increased with the amount of permanganate used for oxidation. Copper value, however, was not increased when the oxidation was carried out in dilute sodium hydroxide solution. On the other hand, in the case of oxidation with sodium periodate, the copper value for purified chitin and chitosan were considerably increased. Further, these oxidation products, chitin or its derivatives were treated with hydrochloric acid under reflux. Appreciable difference in the yield of the glucosamine was not observed between purified chitin and its oxidation products, but in the case of chitin derivatives such as regenerated chitin, carboxymethylchitin or glycolchitin, yields of glucosamine were remarkably increased, so they seem to be less stable than purified chitin against hydrochloric acid. From the results of the copper value and methylene blue adsorption, it will be concluded that decolorization with potassium permanganate should be avoided in preparation of purified chitin.View full abstractDownload PDF (693K) -
Gunichi Kurata, Tatsuo Sakai, Tatsuro Miyahara1965 Volume 11 Issue 1 Pages 55-61
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSEnzymatic degradation of chitin and its derivatives was attempted by means of snail digestive fluid and its acetone-dried powder, which was made from snail gastrointestine and liver. N-acetylglucosamine could be detected by paper chromatography in the degradation process of purified chitin, colloidal chitin, regenerated chitin, acetylated chitosan, carboxymethylchitin or glycolchitin. Glucosamine could be also characterized from degradation product of chiosan by the conversion to arabinose and N-acetylglucosamine. To investigate the above degradation process, viscosity reduction of water-soluble chitin derivatives were measured, and production of N-acethylglucosamine or glucosamine was determined by colorimetric method. In case of carboxymethylchitin and glycolchitin, the hexosamine was produced remarkably by the degradation and viscosity reduced distinctly, but in case of chitosan the yield of glucosamine was small.View full abstractDownload PDF (767K) -
Keiichi Sakai1965 Volume 11 Issue 1 Pages 61-64
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSVitamin K1 was separated by thin-layer chromatography with silicagel (gips 5%) using n-hexane-chloroform (20 : 10) as a solvent system. The V. K1 extracted with ethylacetate from the spot of the thin-layer were irradiated with ultra violet ray to be converted into fluoresent substances. Thus 0.5∼5 μg/ml of V. K1 can be estimated quantitatively by measuring the strength of fluorescence.View full abstractDownload PDF (492K) -
Katsuaki Kametani, Goro Urakubo1965 Volume 11 Issue 1 Pages 65-66
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSSimple and rapid method for the determination of I-131 added in water was proposed. The method consists of precipitation of I-131 as silver iodide, redissolution in 50% sodiumiodide and γ-measurement with the Well-type scintillation couuter. Although the recovery was not so satisfactory, this method may be available for the investigation of the distribution of industrial waste into a river.View full abstractDownload PDF (364K) -
Seitaro Iki, Hiroko Jozuka, Masabumi Hosoe1965 Volume 11 Issue 1 Pages 67-70
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSIn order to measure the inner temperature of heated foods, thermojunction method was applied. Theoretical relation between the shape of foods, heating method and heating time were introduced from the results, and it was discussed whether the inner temperature could reach the germicidal temperature or not.View full abstractDownload PDF (488K) -
Masato Asahina, Akio Tanimura, Toru Adachi1965 Volume 11 Issue 1 Pages 70-72
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSStability of ascorbic acid contained in 21 kinds of commercial liquid multi-vitamin preparations, which had been kept for various periods at 25°, 40° and 50°, was estimated. Dates of the estimation were determined on the basis of theoretical consideration. The degree of the degradation of ascorbic acid in 67 days at 40° practically corresponded with that in one year at 25°, as theoretically expected, assuming the activation energy of ascorbic acid to be 21 kcal. It suggests a recommended condition for stability test of ascorbic acid in these preparations. The degradation rate of ascorbic acid was 10∼40% (average 27%) in one year at 25°.View full abstractDownload PDF (427K) -
Senji Suenaga, Haruhiko Saito1965 Volume 11 Issue 1 Pages 73-75
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSResidual arsenic and lead of unwipped apples obtained from their habitat were determined. Their contents are over the allowable limits in many cases. Removal of residual arsenic and lead by dipping and shaking with detergent soution is more effective than with water, but is not perfect.View full abstractDownload PDF (412K) -
Senji Suenaga1965 Volume 11 Issue 1 Pages 76-79
Published: March 30, 1965
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDust controling effect of the air filter cleaner was tested in chemical laboratories and a residence. The coarse dust impactor, the Roken dust counter and the electrostatic dust sampler were used for dust determinations. Air borne dust was decreased to one third∼one tenth of the control tests by the air filter cleaner, if the number air changes of caused by the apparatus was 5∼6/hr. This air filter cleaner was more effective on fine dust particles than on coarse dust particles, and most effective on the total dust concentration in weight.View full abstractDownload PDF (509K)
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