巻号一覧
39 巻, 8 号
選択された号の論文の14件中1～14を表示しています
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小栗 幹郎1973 年 39 巻 8 号 p. 847-850
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーHistochemical observations were made on the interrenal glands of the stingray, Dasyatis akajei, and bull-head shark, Heterodontus japonicus. The interrenal glands of the stingray showed high activity of 3β-hydroxysteroid dehydrogenase, and was abundant in fats and cholesterol. On the contrary, the glands of the bull-head shark showed low activity of the enzyme. The content of fats and cholesterol was also low, compared with that of the sting-ray. These results seem to indicate differences in corticosteroidogenesis between the two species studied, showing poor production of corticosteroids in the interrenal glands of the bull-head shark.抄録全体を表示PDF形式でダウンロード (412K) -
小栗 幹郎1973 年 39 巻 8 号 p. 851-858
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーHistological investigations were made on the ultimobranchial glands of 107 individuals of goldfish collected at different months of the year and the following results were obtained. Histological structure of the glands was variable, showing lobular, follicular or cord-like arrangements of the ultimobranchial cells. No secretory granules were detected in the cells. Nerve cells were observed in or around the glandular tissue. In the immature goldfish collected in August, October and December, the ultimobranchial glands were small in size, being com-posed of cell cords. On the contrary, the matured fish collected in the spawning season showed hyperplasia of the ultimobranchial tissue, definite formation of lobules and hypertrophy of the cells. Thus, in correlation with gonadal maturation, remarkable seasonal changes were detected in the histological structure of the ultimobranchial gland of goldfish.抄録全体を表示PDF形式でダウンロード (918K) -
各地に発生する赤腐病病原菌の栄養生理と病原性について加藤 盛, 渡辺 競, 佐藤 陽一1973 年 39 巻 8 号 p. 859-865
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーComparative studies were carried out on the cultural character and pathogenicity of isolates of the causal fungus of the red wasting disease, obtained from various culture grounds for Porphyra in Japan. The isolates can be separated into two types on the basis of their nutritional behavior and growth type: one type, named “Seinan type”, requires specific factors for their growth and these isolates show conidium type growth in the synthetic liquid medium containing sucrose and xylan as the carbon source; and the other, named “Tohoku type”, does not require any specific growth factors and grows vigorously with a mycelium type in the medium.
“Seinan type” isolates are much stronger in their pathogenicity than the “Tohoku type” isolates. However, whether these two types of isolates are recognized as a “Race” or not, is a subject for future study.
The growth of hyphae in the Nori tissue is more closely correlated with the metabolic activity (peroxidase activity) of frond tissue rather than nutritive conditions or age of the fronds. The growth speed of hyphae into the tissue of low metabolic activity decreases rapidly in the order of several days after inoculation, but in the tissue of high activity, the growth of hyphae continues vigorously over a long period of time.抄録全体を表示PDF形式でダウンロード (1400K) -
魚谷 逸朗1973 年 39 巻 8 号 p. 867-876
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーPostlarval anchovy showed a definite change in the shape of its gas bladder between day and night. Such diurnal changes appeared in the sardine and round herring too. Major points of interests are summarized as follows:
1. Gas bladder of the postlarval anchovy, over 7.1 mm in total length, appeared shrinking throughout the day.
2. A ratio of different sized gas bladders indicate that it takes about one hour for the fish to expand and shrink the bladders. Volume of the bladder is approximately pro-portional to 3.6 times the total length.
3. Changes in the gas bladders may not be always indispensable for controlling depth of the swimming layer. But, these may contribute to regulating its specific gravity and also to holding the balance of the fish.
4. The shape of gas bladders of elongated postlarvae may affect hydrostatic resistance of the body. Thus, the larvae may increase their activity during day when the body becomes slender. At night, the fish may remain still, stop feeding and break up the composition of the school. Such thinning of density may be effective for reducing mass predation on the postlarvae at night.抄録全体を表示PDF形式でダウンロード (613K) -
コイおよびクロダイの孵化後の成育にともなう消化酵素活性川合 真一郎, 池田 静徳1973 年 39 巻 8 号 p. 877-881
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーThe development of protease and amylase activities of carp, Cyprinus carpio, and black sea bream, Acanthopagrus schlegelii, after hatching was studied. The results obtained are as follows.
Though high tryptic activity occurred in carp eggs and increased with growth after hatching, peptic activity was very weak in the eggs and did not increase along with growth. On the other hand, maltase and amylase activities developed along with growth from 7-10 days after hatching.
Even a carnivorous fish like black sea bream clearly showed amylase activity at 11 days after hatching which increased gradually with growth. Development of the peptic activity in black sea bream coincided with that of differentiation of the gastric gland. The tryptic activity appeared at 3 days after hatching and increased gradually with growth.抄録全体を表示PDF形式でダウンロード (237K) -
河端 俊治, 栗原 道彦, 葛西 英一, 吉田 千恵子1973 年 39 巻 8 号 p. 883-889
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーDimethylamine (DMA) is known to be widely distributed in the edible portions of marine fish and shellfish, occurring at especially high levels in the fish species of Gadidae. Much attention has been paid to the possible formation of carcinogenic dimethylnitrosamine (DMNA) in salted Alaska pollack roe products when nitrite is applied as a color fixative. The present paper deals with the conditions relating to the formation of DMNA in the salted products and a possible method for the prevention of the carcinogen formation. The results obtained may be summarized as follows:
1. No DMNA was detected in the salted roe products prepared with nitrite at less than 0.09 mM, while DMNA was detectable when higher concentrations were used. It is to be noted that the addition of an equivalent mole or more of Na-ascorbate to Na-nitrite markedly inhibited the formation of DMNA in the salted products.
2. Nitrite acted as an inhibitor of the formation of DMA, while ascorbate enhanced the formation of the same amine, thereby suggesting that these substances affect the enzyme capable of forming DMA from trimethylaminoxide in the fresh roe.
3. The freshness of raw material did not influence the formation of DMNA in the salted products.
4. Almost no DMNA was detected (minimum detectable level, 1 ppb) in the 23 com-mercial salted Alaska pollack roe products being purchased at the Tokyo Central Wholesale Market in 1972.抄録全体を表示PDF形式でダウンロード (430K) -
かんきつ類テルペンの水産加工への利用について外山 健三, 安斎 公次, 菊池 啓造1973 年 39 巻 8 号 p. 891-898
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーCitrus fruit oils, which contain more than 90% terpenes, have been known to prevent flavor reversion in soybean oil and spoilage in fish sausage. The authors attempted the application of these substances to the protection of fish products from deterioration due to oil oxidation while noting at the same time, the effect of added citrus flavor on fish products.
Six citrus oils differing in the raw citrus source and the method of preparation were tested for their antioxidative effect on fish oil. Though hardly effective when tested under such severe conditions as those of the Active Oxygen Method, they were fairly effective under such milder test conditions as those of the oven test at 37°C and the storage test at room temperature.
Among these citrus oils, lemon terpene was found to be most practical as it is less ex-pensive as well as satisfactorily effective. When it was applied to salted dried saury and Shiokara, a product of half-autolysed skip jack gut with 30% salt, the lemon flavor im-proved the impression of the products, although the antioxidative effect was not as significant as that of BHA.抄録全体を表示PDF形式でダウンロード (568K) -
加藤 登, 内山 均1973 年 39 巻 8 号 p. 899-903
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーThe conditions for automatic analysis of trimethylamine (TMA) were examined by using a Technicon autoanalyzer.
To the trichloroacetic acid (TCA) extract of fish muscle, 10%. formaldehyde and 30% potassium hydroxide solutions are successively added and then the mixture is heated in an oil bath at 60°C. The TMA thus liberated from the reaction mixture is captured in a gas trap, then mixed with a solution of bromthymol blue, and finally determined colorimetrically at 620 mμ.
Within the range of 3-50 μg N/ml, there was a linear relation between optical density and TMA concentration. Results obtained using this method correlate very well with those obtained by the picrate method in which potassium hydroxide was substituted for potassium carbonate.抄録全体を表示PDF形式でダウンロード (421K) -
飯田 優, 田中 豊, 高木 光造1973 年 39 巻 8 号 p. 905-910
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーThe effect of ribonuclease and trypsin treatment on the intracellular haemolytic factor was investigated employing strains of Vibrio parahaemolyticus and related organisms. Nine fractions were derived from dried cells of each of the strains subjected to water extrac-tion plus enzyme treatment. The resultant insoluble fraction of a strain of V. parahaemoly-ticus was separated into three subfractions (A, B and C) of cellular debris by density gradient centrifugation.
The haemolytic activities of these fractions were estimated quantitatively and the results are summarized as follows. (1) Haemolytic activity was not found in any of the soluble fractions. (2) The activity was found in dried cells and also in the water insoluble frac-tions of the Kanagawa phenomenon-positive strains, but not in those prepared from a negative strain. There were activity increments in both the Kanagawa phenomenon-positive strains and the single negative strain which were subjected to trypsin digestion. (4) Among the three fractions, A, B and C, A and B showed higher activities than C.抄録全体を表示PDF形式でダウンロード (390K) -
藤田 雄二1973 年 39 巻 8 号 p. 911-915
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーCollapse of the laver frond by enzymes of bacteria, Vibrio sp. strain V7 and Pseudomonas sp. strain N9 which cause “green spot rotting-like deterioration”, was investigated to elucidate the action of these bacteria on laver.
The crude extracellular enzyme of each strain macerated frond pieces. Degradation of the acidic polysaccharide, porphyran, in intercellular space was recognized in the macerated parts of frond pieces. The activities of crude enzymes which macerate frond pieces had high values at pH 6.2-8.3 at temp. 30-40°C for strain V7 and at pH 5.4-8.0 at temp. 35-40°C for strain N9. The change in the frond pieces due to enzymatic treatment was similar not only to the phenomenon observed in vitro but also to the symptom in situ in the occurrence of plasmoptysis from liberated cells.抄録全体を表示PDF形式でダウンロード (466K) -
鈴木 たね子, 三好 宇史1973 年 39 巻 8 号 p. 917
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (90K) -
市川 龍資1973 年 39 巻 8 号 p. 919
発行日: 1973/08/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (77K) -
1973 年 39 巻 8 号 p. 922a
発行日: 1973年
公開日: 2008/04/22
ジャーナル フリーPDF形式でダウンロード (52K) -
1973 年 39 巻 8 号 p. 922b
発行日: 1973年
公開日: 2008/04/22
ジャーナル フリーPDF形式でダウンロード (52K)
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