巻号一覧
19 巻, 1 号
選択された号の論文の12件中1～12を表示しています
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Structure of the Stomachal Plates of Dolabella scapulaTakashi HIBIYA, Eiji IWAI, Yoshiro HASHIMOTO1953 年 19 巻 1 号 p. 1-4
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (928K) -
Chemical Cons ituents of the Stomachal Plates of Dolabella scapulaYoshiro HASHIMOTO, Takashi HIBIYA1953 年 19 巻 1 号 p. 5-8
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーThe stomachal plates of Dolabella are hard and do not dissolve in water. If dried, they become hard brown mass just like crude gelatin, which swells again to the original shape in water.
The insolubility in drastic reagents, such as cold concentrated mineral acids and hot 50% potassi ?? m hydroxide, shows that the main component of the plates differs apparently from a buminoids, to which belongs conchiolin1) found in the shell of molluscs, They dissolve only in boiling concentrated hydrochloric acid, yielding powerful reducing substance. These characters may show the structural component consists of chitin.抄録全体を表示PDF形式でダウンロード (147K) -
小池 篤1953 年 19 巻 1 号 p. 8-11
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーA trawl net (Fig. 1, 2, 3) being used in a few meters about the sea bottom is studied by the model experiment and the form of net and the water resistance acting on net are observed in case the dragging speed and the span are varied. (Fig. 4, 5, 6, 7).抄録全体を表示PDF形式でダウンロード (195K) -
Atusi KOIKE1953 年 19 巻 1 号 p. 12-14
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーTAUTI's method of estimation of the loss-rate of fish population in a ground is applicd to the monthly catch of mackerel in 25 fishing grounds, and the supposition that any school of mackerel does not visit many grounds in every season is cited and when the supposition is justified with the record of recaptured mackerel in tagged season.抄録全体を表示PDF形式でダウンロード (115K) -
幽門垂エキスの窒素化合物について柏田 研一, 柿本 大壱, 山崎 利盛1953 年 19 巻 1 号 p. 15-18
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーIn the previous paper authors had reported that much amount of extract (moreover 70% in dry matter) and aluminium was contained in pyloric coeca of skipjack, however in this experiment they studied on the distribution of nitrogen compound and the variation of its component occurred by acid hydrolysis, and at the same time they tried to analyse this extract by the fractionally analytical method which was already known as Wasteneys' incomplete protein hydrolysates, (3), and obtained the following result.
1) As dry matter about 58.62% of amino acid was included in this extract, but it increased to 73.79% by acid hydrolysis, and they ascertained to contain much amount of higher molecu ?? ar nitrogen component in pyloric coeca.
2) Main component of this extract was not protein, but peptone, subpeptone and poly peptide.
3) It was very easy to hydrolyse the extract, when they used HCl for reagent, hydrolysation completed within 30 minutes.抄録全体を表示PDF形式でダウンロード (334K) -
サメ肉に於けるアンモニア発生の特異性についての考察(その2)清水 亘, 日引 重幸1953 年 19 巻 1 号 p. 19-22
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーWe have reported in the previous paper1) that the step found on the ammonia-developing curve in the process of putrefaction of shark muscle, was responsible for setting of the muscle during storage. In the present work, we have been led to the conclusion that it was mistake and must be correct as follows:
Urea in the shark muscle may be distributed inside and outside of the muscular cells, and bacteria may act first on exterral urea and next on internal urea secreted from the cells which have been broken by enzyme and bacteria. We expected that the step on the ammonia-developing curve might be due to that the speed of the development of ammonia would be dull at the final point of decomposing of external urea.抄録全体を表示PDF形式でダウンロード (278K) -
橋本 鶴夫1953 年 19 巻 1 号 p. 23-30
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーTo obtain necessary data for designing an electric fish screen more efficient than those tested previously, effect of electric current on fish has been studied along with field tests on the performance of an experimental screen.
1) Effect of electric current of fish:-Electric potential gradient to which fish would react was measured when the current ran in parallel or came at right angles with the body of fish. Critical potential gradient to paralyze a fish was also investigated. The results of the experiments are given in Table 1 and Figure 3.
2) Field test on the performance of an experimental screen:-From a practical point of view a vertical grid type of electric screen was employed to supply an alternating current of 50 or 60 cycles respectively. The screen, as illustrated in Figure 1, consisted of a series of vertical grids of copper wire hung from the feeders spanned across a stream leading to a fish farm. It was arranged in accordance with Tauti's theories (1932) so that distribution of the electric potential in the fields between the consecutive grids or electrodes was intensified just as the fish swam ahead by adjusting distance between the poles or using different voltage of the current.
Two sets of the screen were installed across the water way, dividing it into three sections A, B and C, as illustrated in Figure 4. A net made of wire or thread to be placed at the ends of the section will serve to keep the fish inside. Keep a similar net between the sections until the fish get calm down in the section B, and when counting the fish fled into sections A and C.
Release a certain number of fish in section B, then start the operation to observe effect of the electric current upon behaviors of the fish, taking the net partitions out of the water.
Because of difficulty in counting the number of fish driven back by the screen, the screening efficiency was expressd in a ratio computed as N-Nf-Ne/N where N represents the number of fish, Nf the number of fish fled through the sereen, and Ne the fish electrocuted. Table 2 indicates the results thus obtained with detail of the experimental cenditions.
Since the potential gradient was distributed as shown in Figure 2, the fish, when they swam in group, would turn back just before reaching the first grid or the second. Even when happened to pass through the first, they would soon come back and remain swimming about in a safe area of B where little or no electric potential-gradient existed. However, when a fish swam independently from the group, it often rushed into the fields inside of the grids to be benumbed, or in the worst, electrocuted. Small sized fish or youngs, especially those reared in a hatchery, were found difficult to be screened away by the electric current.抄録全体を表示PDF形式でダウンロード (459K) -
町田 喜弘, 櫻井 寿恵1953 年 19 巻 1 号 p. 31-33
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーAn attempt was made on the chemical analysis of organic adhesive detritus-mainly composed of Diatomeae and Cyanophyceae (Table 1)-on gravels in Kazuno (Yamanashi prefecture) and Chikuma (Nagano prefecture) Rivers in 1951. The relations between the chemical composition, packed volume and dry weight were tabulated (Table 2). It was found that the detritus contains lipides abundantly, i.e. ca9% in organic fraction.抄録全体を表示PDF形式でダウンロード (205K) -
鉄本 総吾, 内山 均, 横山 和吉, 興津 知明1953 年 19 巻 1 号 p. 34-38
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーPreservative effects of chemicals and ultra-violet ray on fish cakes were examined.
Preservatives : Each of the following chemicals was added to the mashed fish meat in the prescribed percentage.
1. Furaskin (5 nitro 2 furfuryl semicarbazone) 0.003%
2. Panazone (Bis 5 nitro furfurylidine acetoneguanyl hydrazone) 0.003%
3. Dehydro acetic acid (D. H. A.) (3 acetyl 6 methyl 2.4. (3H) dione) 0.1%
Ultra-violet ray : Quartz tube (diameter 25mm, length 36mm) is placed at a height of 30cm above “Kamaboko” (a kind of fish cakes) containing no preservatives to project the ultra-violet ray of wave length 2537 Å on the surface of “Kamaboko” for 30 minutes.
Four samples of “Kamaboko”, each containing one of the preservatives or treated by the ultra-violet ray, were kept for days in an incubator at a temperature of 30°C and in a high humidity. The results of organoleptic inspection are given in Table 2 and the increases of total volatile acid, volatile basic nitrogen and number of micro-organisms are given in Figs. 1, 2 and 3 respectively.
Judging from the results, it may be said that furaskin is the most effective among the three preservatives, while panazone has least preservative power for fish cakes. The ultra-violet ray proved to have the antiseptic effect and preservative effect, slightly stronger than those of D. H. A.抄録全体を表示PDF形式でダウンロード (249K) -
Cysteine代謝に及ぼすFormaldehydeの影響山田 金次郎, 有賀 佐代子1953 年 19 巻 1 号 p. 39-44
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーIt has been found that the bacteriostatic action of formaldehyde is reversed by cysteine and that the reversal is attributed to the formation of thiazolidine-4-carboxylic acid (TCA) due to the reaction between the two substances.*
In this paper, some attempts have been made to ascertain whether formaldehyde inhibits the cysteine metabolism of bacteria or not. The results obtained are as follows.
(1) In a synthetic medium TCA, at its concentrations over 7. 5×10-4 M, exerts its inhibitory action on the growth of E. coli as reported by BEERSTECHER10) (Table 1), while in a broth medium little effect of TCA is observed even at its far higher molar concentrations than that of formaldehyde used for the experiments of bacteriostasis* (Table 2). The laatter fact may demonstrate that the bacteriostatic action of formaldehyde is not due to the effect of TCA.
(2) At the concentrations below 11×10-4 M, TCA, plays the role of sulfur source to the growth of E. coli in a synthetic medium free from sulfur compound (Table 3) and its efficacy as sulfur source is nearly as same as sodium sulfate, cysteine and others (Table 4). From the above results, it may be said that formaldehyde dose not inhibit the cysteine metabolism of bacteria owing to the formation of TCA.
(3) It has been further proved that the cells of E. coil dehydrogenate TCA (Table 5) and that a certain enzyme participates in this dehydrogenation (Table 6, Figs. land 2).抄録全体を表示PDF形式でダウンロード (385K) -
III. Seaweeds (Part 2) and OthersYoshiro HASHIMOTO, Tokuji SATO1953 年 19 巻 1 号 p. 45
発行日: 1953/05/25
公開日: 2008/02/29
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IV. Variations in the Vitamin B12 Content of Marine Animals in the SpoilageTakajiro MORI, Yoshiro HASHIMOTO, Yasuhiko MAEDA1953 年 19 巻 1 号 p. 45a
発行日: 1953/05/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (66K)
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