巻号一覧
22 巻, 5 号
選択された号の論文の11件中1～11を表示しています
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朴 龍俊1956 年 22 巻 5 号 p. 275-278
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーThis study was attempted to investigate the coating effect of the wooden float. Three kinds (following A, B, C) of wooden pieces made of paulowania, Japanese cypress and birch being used commonly as the wooden float were selected, and five pieces were employed to each run as the test pieces.
A. The wooden pieces dried in an oven for 3 hrs at 100°C after being cut into a dimension of 10×10×20mm3.
B. The wooden pieces coated with synthetic resin paint five times for the test pieces-A.
C. The wooden pieces impregnated, for 5 hrs under pressure of 5 atm by a compressor, with low condensation phenol resin which has resin content 20.2%, specific gravity of 1.060 and specific viscosity of 2.49, then coated by the same method as in the case of the test pieces-B.
Table 1 shows the weight of synthetic resin which coated the test pieces-B and-C and of the resin impregnated in the test pieces-C.
The test pieces treated by the above mentioned methods were then allowed to soak in the sea water the temperature of which was regulated at 30°C, and then absorption of water was measured by the increment of weight.
The amount of absorbed water W after being soaked for t hours may be represented by the following emprical expression;
W=WI(1-e-α1t)+WII(1e-α2t)
where WI, WII, α1 and α2 are constant.
The difference of the mode of absorbing process with the treatments can be seen in Fig. 1 and Table 2.
1. The coating effect of the test pieces treated only with synthetic resin paint or both the resin paint and the resin was effective distinctively as compared with the untreated ones.
2. An appreciable effect due to impregnation could not be seen, but this treatment caused shrinkage and warpping of the test pieces.
3. All the untreated test pieces sunk thoroughly within a month after soaking, but the treated ones were floating during three months under this experiment.抄録全体を表示PDF形式でダウンロード (294K) -
落合 明1956 年 22 巻 5 号 p. 279-283
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーThe growth differentiation found among 19 Japanese soles obtained from southern part of Japan is quantitatively viewed with several biological aspects.
At the age of 3 years, the body reaches 100mm or even becomes longer in the fishes belonging to the subfamily Synapturinae, but in those of the other subfamilies of Soleidae (Soleinae and Achirinae) it is usually shorter. In the family Cynoglossidae, the members of the subfamily of Cynoglossinae attain on the whole more than 100mm in the body length, whereas the fishes of the Symphirinae never reach 100mm.
According to extremity body length calculated by the difference diagram, each of the tropical, subtropical and temperate forms is clearly divided into 3 groups. But the tropical form is always more or less longer than the others (Fig. 3). It also seems probable that in the same genus the species originated in the tropical ocean have a longer body than the endemic ones of Japan and China (i.e.: Zebrias zebra-Z. japonicus, Aseraggodes kaianus-A. kobensis, Symphurus strictus-S. orientalis).
There is a tendency in this group that the higher counts anal soft rays the fish has, the larger the body becomes.抄録全体を表示PDF形式でダウンロード (334K) -
小坂 昌也1956 年 22 巻 5 号 p. 284-288
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーThe indiuidual fish of Limanda yokohamae was liberated one by one from a definite position into the experimental pool, whose bottom was provided on one side with the fine sand and the other side with the small gravel, each in half space.
The number of individuals settled on either the sand or the gravel bottom was counted at each time of the liberation. The same was done by the different species, Kareius bicoloratus.
The results showed that, when the population density is low, both the species tend to settle on the side of sand than gravel; however, with the increasing density, the tendency of preference for the sand gradually falls. (Figure 1)
Namely, the probabilities for the settlement on the sand are high at the lower density and decrease as the density becomes higher.
In order to find out the relationship between the habitat preference and the population density, MORISITA'S theory on the environmental density and probability formula derived from its theory were applied for the analysis of the results of this experiment. The frequency distribution of the number of individuals settled on the bottom of the tank were conicident well with the expected values calculated by MORISITA'S formula for both the species (Tables 2 & 3).
The values of the environmental density (expressed as the population density) were 0.10 for the sand and 3.10 for the gravel in the case of L. yokohamae and 0.22 for the sand and 1.95 for the gravel in the case of K. bicoloratus.抄録全体を表示PDF形式でダウンロード (357K) -
熱処理したスルメの膨潤及び弾性的挙動岸本 昭, 三橋 薫, 藤田 博1956 年 22 巻 5 号 p. 289-292
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (295K) -
熱処理したスルメの弾性的挙動岸本 昭, 藤田 博1956 年 22 巻 5 号 p. 293-296
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (230K) -
スルメの種々な媒質中における応力緩和岸本 昭, 藤田 博1956 年 22 巻 5 号 p. 297-300
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (234K) -
かまぽこの破断にたいするRIVLINの方法の応用二宮 和彦1956 年 22 巻 5 号 p. 301-305
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (294K) -
新鮮魚肉の熱伝導率藤田 博, 岸本 昭1956 年 22 巻 5 号 p. 306-310
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (278K) -
寒天ゲルの剛性率三木 康夫, 二宮 和彦1956 年 22 巻 5 号 p. 311-315
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーPDF形式でダウンロード (337K) -
幽門垂エキスよりヒスチジンの分離柿本 大壱, 水間 博1956 年 22 巻 5 号 p. 316-319
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーIn order to prepare the histidine from the extract in pyloric coeca of skipjack, Japanese acid clay was used as adsorvent. adsorbed histidine was eluted from acid clay and precipitated with Hopkins-Cole reagent.
The yield of histidine thus obtained corresponded to 64 per cent by the bioassay value.抄録全体を表示PDF形式でダウンロード (737K) -
幽門垂エキスよりアルギニンの分離柿本 大壱, 吉峰 哲郎1956 年 22 巻 5 号 p. 320-323
発行日: 1956/09/25
公開日: 2008/02/29
ジャーナル フリーIn the isolation of arginine from extractive matter of pyloric coeca, it is necessary to find means for elimination of agmatine. Basic nitrogen compounds containing arginine and agmatine were separated from other matters by the treatment with activated charcoal at pH 8.0 followed by the elution with HCl-acetone. After removed of acetone the residue was treated with picric acid, almost all the agmatine being precipitated. After filtyering off the agmatine picrate, arginine was precipitated as its flavianate, and finally purified as the hydrochloride. The yield of arginine thus obtained corresonded to 76% by the bioassay value.抄録全体を表示PDF形式でダウンロード (877K)
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