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Volume 11 (1942 - 194･･･
- Issue 5-6 Pages 163-
- Issue 4 Pages 129-
- Issue 3 Pages 81-
- Issue 2 Pages 47-
- Issue 1 Pages 1-
Volume 11, Issue 5-6
Displaying 1-8 of 8 articles from this issue
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Tametake NAGANO1943 Volume 11 Issue 5-6 Pages 163-167
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSPersistence of a diurnal rhythm in the migration of the retinal pigments of several crustaceans, in spite of constant conditions of illumination or of darkness is known. The distal pigment and the reflecting pigment in the eyes of three shrimps, Leander paucidens, Paratya compressa, and Spirontocaris alcimede, continue their characteristic movements under constant external conditions. These movements are able to analyse by some experimental methods. The regularly recurring 24-hour cycles in pigment migration in the eye of these shrimps might be due to regular variation in the activity of nervous inhibitory centers causing a variation in the amount of hormone released from the gland of the eye-stalk.View full abstractDownload PDF (321K) -
Toraitiro KINOSITA, Sangorô SIBUYA, Zirô SIMIZU1943 Volume 11 Issue 5-6 Pages 168-170
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe spawning of the scallop was invariably induced when water-temperature of a vessel containing it was raised by 5° from 14°-15°C in two or three hours, and pH value of the medium was changed from 8.1 to 8.2-8.5.View full abstractDownload PDF (914K) -
Takasi INO1943 Volume 11 Issue 5-6 Pages 171-174
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDiurnal periodicity as well as seasonal change was observed, in the neighbourhood of Kominato, Tiba Prefecture, in the feeding intensity of Haliotis gigantea discus REEVE. This gastropod feeds mostly at night and its food-consumption culminates during a period from January to April or May but declines toward summer. The insensity reaches a minimum during the breeding season which lasts from October to November and again resumes an ascent thereafter. Hand in hand with this change, the growth of the animal attains a maxi-mum and a minimum in the corresponding months. These results are also supported by an analysis of the data already published by OKAMUEA and SEND (1920) who, however, maintained a diagonally opposite view ons the feeding and growth of Japanese abalone.View full abstractDownload PDF (278K) -
S. UEDA, M. KATADA1943 Volume 11 Issue 5-6 Pages 175-178
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (530K) -
M. TAUTI1943 Volume 11 Issue 5-6 Pages 179-183
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (357K) -
Yositada TAKENOUTI1943 Volume 11 Issue 5-6 Pages 184-187
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAn apparatus has been constructed which can detect fish-shoals by the fluctuating submarine illuminations when fish-shoals pass over the photometer dipped beneath water. The principle of the apparatus in as follows:
An audible frequency produced by an electric oscillator is led to the first grid of the vacuum-tube, though generally the current of this audible frequency is stopped by means of the negative potential of the third grid. But, when fish-shoals pass over the submarine photo-cell, the photo-current suddenly decreases and the potential of the third grid becomes positive. Therefore, the audible alternating current flows to the sixth grid (the plate) and rings the cone affxed to the case of apparatus. The capacity of the connecting condencer is so chosen as to select only the rapid change of photo-current, in order to distinguish between the slow decrease of submarine illuminations due to clouds and the rapid one due to fish shoals, the latter only being effective to the apparatus.View full abstractDownload PDF (1309K) -
M. TAKAOKA, Y. ABE1943 Volume 11 Issue 5-6 Pages 188-191
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (264K) -
Fundamental Studies on the Mechanism of the FermentationNoboru SUZUKI1943 Volume 11 Issue 5-6 Pages 192-196
Published: March 13, 1943
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe mechanism of acid producing fermentation of seaweeds and the method to determine the produced acids were studied.View full abstractDownload PDF (302K)
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