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Volume 20 (1979)
- Issue 6 Pages 411-
- Issue 5 Pages 291-
- Issue 4 Pages 223-
- Issue 3 Pages 161-
- Issue 2 Pages 93-
- Issue 1 Pages 1-
Volume 20, Issue 2
Displaying 1-9 of 9 articles from this issue
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Qualitative and Quantitative Analysis of Coal-tar Dyes for Food by Derivative Spectrophotometry. IIHideto SASAKI1979 Volume 20 Issue 2 Pages 93-100
Published: April 05, 1979
Released on J-STAGE: July 27, 2010
JOURNAL FREE ACCESSThe first and second derivative spectra of liquid foods were measured for examining synthetic dyes added in them. For commercial soft drinks, there was a little difference between the found concentration of dyes used and the concentration in the eluate after wool dyeing process by this procedure. By the second derivative spectrophotometry, food colors were directly and satisfactorily detemined even in. turbid lactic drinks, of which turbidity were found no influence on the spectra of dyes. Above all, the dyestuff in these drinks was identified by comparing its derivative spectrum (especially second derivative spectrum) with that of dyestuff standard.
A synthetic dye in liquid foods which was qualitatively determined by this procedure was also confirmed by thin layer chromatography.View full abstractDownload PDF (1197K) -
Kiyoko SAEKI, Hiroshi KUMAGAI1979 Volume 20 Issue 2 Pages 101-105
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESSThe muscles of wild and cultured yellowtail, Seriola quinqueradiata, were divided into five parts, and for each part the amounts of moisture, protein, and ash were analyzed and calorific value was estimated. Following results have been obtained.
In all parts of muscle, the cultured fish were significantly richer in lipid content and higher in calorific value, but slightly poorer in moisture, protein and ash contents, as compared with the wild fish.
It has been found for both wild and cultured fish that the difference between parts of each individual in the content of all nutritive components studied was larger than the difference between the individuals. The difference in the lipid content between the parts was particularly large, and the coefficient of variation is 97% in the wild fish and 49% in the cultured fish.
From these results, it has been concluded that the standard values of the content listed in Japanese standard table of nutritive component of foodstuff utilized at present are right for protein and ash, but not adequate for lipid, moisture and calorific value. It may be recommended that these standard values of moisture, lipid and calorific value are to be revised and be tabulated separately for the wild fish and the cultured fish. With regard to the lipid content, the range of the deviation should be given.
For the wild and cultured yellowtail muscles, the coefficients of correlation of lipid content with moisture, protein, and ash content have all large negative values, while those of moisture content with protein and ash contents and that of protein content with ash content have all large positive values.View full abstractDownload PDF (776K) -
Koichi MURAMATSU, Setsuko MARUYAMA, Setsuji NISHIZAWA1979 Volume 20 Issue 2 Pages 106-114
Published: April 05, 1979
Released on J-STAGE: July 27, 2010
JOURNAL FREE ACCESSIt has been known that, nitrite, one of the precursor of nitrosoamine, is formed by the oral bacteria that reduce nitrate. We have tested the human salivary samples obtained periodically from four healthy adults at about one week interval for the numbers and the populations of aerobic and anaerobic bacteria that could reduce nitrate.
In the samples tested, about 22% of the bacteria isolated were found to reduce nitrate, and 80% of them were anaerobes.
The nitrate-reducing bacteria frequently encountered were Veillonella, Propionibacterium, Corynebacterium, Micrococcus, Neisseria and Lactobacillus.
There was no significant difference in the ability to reduce nitrate among the Veillonella alcalescense Micrococcus sp., Corynebacterium sp., Staphylococcus epidermidis and Staphylococcus aureus, all isolated from the salivary samples. On the other hand, the extent of further reduction of the nitrite was found to differ with these bacterial species, and was also greatly influenced by the cultural conditions.View full abstractDownload PDF (2713K) -
Studies on Residues of Synthetic Antibacterials in Livestock Products. IINorihide NOSE, Yoshinori KIKUCHI, Fumiko YAMADA, Akinobu WATANABE1979 Volume 20 Issue 2 Pages 115-119
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESSGas chromatographic determination of sulfanilamides in egg and animal tissue was studied. The volatile derivatives of sulfanilamides were prepared with a diazomethane only and determined by the gas chromatograph equipped with an electron capture detector.
Sulfadimethoxine and sulfaquinoxaline were detected in commercial egg and chicken tissue by this method. Linear calibration curves for the gas chromatographic determination were obtained in ranges of 0.025 to 0.25μg/ml for sulfamonomethoxine, 0.1 to 1.0μg/ml for sulfadimethoxine and 0.2 to 2.0μg/ml for sulfaquinoxaline, respectively. The separation was found to be good with QF-1 on Gas chrom Q.View full abstractDownload PDF (876K) -
Tohru ADACHI, Akira TANAKA, Tsutomu YAMAHA1979 Volume 20 Issue 2 Pages 120-126
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESSExcretion, distribution and metabolism of sodium octadecyl sulfate, one of higher alcohol sulfate detergents, were investigated after oral administration of the 35S-labeled compound to rats.
It was found that about 93% of the dose was excreted in the urine and about 2% in the feces by 24hr. The radioactivity distributed in organs and tissues was relatively low and specific organ-affinity was not observed.
Butyric acid 4-sulfate- [35S] was identified as the major urinary metabolite by means of Dowex-1 column chromatography, TLC, GLC, GC-MS and inverse isotope dilution method. A small amount of inorganic sulfate- [35S] was also detected in the urine.
These metabolic patterns of octadecyl sulfate were very similar to those of other higher alcohol sulfate detergents, such as decyl, dodecyl and hexadecyl sulfates.View full abstractDownload PDF (1237K) -
Studies on Bacterial Contamination of Liquid (Frozen) Whole Egg. INobuhiro SASHIHARA, Hiroshi MIZUTANI, Sumie TAKAYAMA, Hirotaka KONUMA, ...1979 Volume 20 Issue 2 Pages 127-136
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESSDuring the period from June 1977 through May 1978, a total of 1, 035 samples of liquid whole egg and a total of 840 samples of shell egg were examined bacteriologically. Unpasteurized whole eggs were contaminated more intensively in summer season than in winter season, but pasteurized whole eggs had only small counts of total and coliform bacteria regardless of season. Enterococci, contained at the level of 102/g in the unpasteurized whole eggs, hardly decreased by pasteurization and freezing. The surface of washed shell eggs (total count 3.9×104/egg, and coliform count 2.8×10/egg) were contaminated slightly comparing with unwashed shell eggs (3.6×106/egg, and 1.9×102/egg respectively). In the survey of microbial flora, gram positive cocci and coryneform were predominant on the surface of shell egg, gram negative bacteria such as Enterobacteriaceae, Aeromonas and Pseudomonas were main bacteria in the unpasteurized whole egg, and gram positive bacteria such as Staphylococcus, Micrococcus, Streptococcus and Bacilius were observed as well as gram negative bacteria in the pasteurized whole egg.View full abstractDownload PDF (1563K) -
Hiroyuki KURODA, Takaaki MORI, Chizuru NISHIOKA, Hidenobu OKASAKI, Mas ...1979 Volume 20 Issue 2 Pages 137-142
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESSSeveral methods for the determination of trichothecene mycotoxins in food have been published. Most of them, however, are not always satisfactory. In this paper trichothecenes were converted to their TMS derivatives by the reaction with silylating agent (N-trimethyl imidazol (1): trimethyl chlorosilane (0.2): pyridin (9)) and analyzed by gas chromatography equippod with an electron capture detector.
The minimum limits of quantitation were approximately 0.002ng for nivalenol, deoxynivalenol, fusarenon-X and 0.4ng for neosolaniol, diacetoxyscirpenol, T2-toxin.
This method was applicable to ultra micro analysis of trichothecenes, and by this method, trichothecenes in the range of 0.02-5.2ppm were detected in wheat and barly collected from Kagawa area in 1977.View full abstractDownload PDF (808K) -
Studies on Degradation of Food Additives by Irradiation. VMutsuo ISHIZAKI, Noritaka OYAMADA, Seiichi UENO, Kaoru KATSUMURA, Yuta ...1979 Volume 20 Issue 2 Pages 143-146
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESSIn our previous works, we reported many degradation products and reaction products of butyl hydroxy anisol (BHA) with Sodium nitrite or potassium nitrate by irradiation of UV-ray. These compounds were as follows:
Reaction products: 1, 4-dimethoxy-2-nitrobenzene (I), 1-hydroxy-2-tert-butyl-4-methoxy-6-nitrobenzene (II), 1, 4-dimethoxy-2-tert-butyl-6-nitrobenzene (III), 1, 4-dihydroxy-2-tert-butyl-6-nitrobenzene (IV). Degradation products: 2-tert-butyl-quinone (V), 2-tert-butyl-hydroquinone (VI), 2-tert-butyl-1, 4-dimethoxy-benzene (VII), 2′, 3-di-tert-butyl-2-hydroxy-4′, 5-dimethoxy biphenil ether (VIII), 3, 3′-di-tert-butyl-2, 2′-dihydroxy-5, 5′-dimethoxy biphenyl (IX), 3, 3′-di-tert-butyl-2′-hydroxy-2, 5, 5′-trimethoxy biphenyl (X), 3, 3′-di-tert-butyl-2, 2′, 5, 5′-tetramethoxy biphenyl (XI)
In the present paper, we studied on mutagenicity of these compounds. Compound-VI showed a notable mutagenicity in the rec-assay using wild and recombinationless strains of Bacillus subtilis and sensitivity test using wild and rad mutant strains of Yeast in comparison with original materials.View full abstractDownload PDF (1539K) -
Kiyoko SAEKI, Hiroshi KUMAGAI1979 Volume 20 Issue 2 Pages 147-150
Published: April 05, 1979
Released on J-STAGE: March 01, 2010
JOURNAL FREE ACCESS
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