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Volume 16, Issue 7
Displaying 1-11 of 11 articles from this issue
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(II). On the Distribution and the Seasonal Change of the BenthosRyonosuke KITAMORI1950 Volume 16 Issue 7 Pages 275-280
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSBy using a modified Ekmann type bottom sampler, seasonal sampling of the benthos was made in Tokyo Bay from May, 1947 to July, '49. The benthic animals, especially Polychaeta, studied biogeographically. The analysis of data indicates the facts as shown below.
The dominant species have their regular habitat and they inhabit mostly one by one. The Bay is ronghly divided into fonr areas, according to the composition and the tempera-ture of the bottom mud and the other environmental conditions with reference to the benthos. And these areas are in close connection with crop of benthic fishes.View full abstractDownload PDF (354K) -
Tadayoshi SASAKI1950 Volume 16 Issue 7 Pages 281-294
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (741K) -
Tadayoshi SASAKI1950 Volume 16 Issue 7 Pages 295-298
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (151K) -
Junsaku NONAKA1950 Volume 16 Issue 7 Pages 299-302
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (210K) -
Fumio MATSUMOTO1950 Volume 16 Issue 7 Pages 303-305
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSSynopsis: Lecithine contents in the various tissues and organs of sardine are measured by means of the method of W. Lintzel1) which determined trimethylamine in choline produced by decomposition of lecithine.
The results are given in table. The brain is the organ richest in lecithine, containing 30.7mg in 1 gr. of fresh matter, and the next is the heart, as observed in other animals.
As to the flesh, the ordinary flesh contains slightly less than half of the amount in the dark flesh which ranks the third.
It is the most interesting fact that the adipose tissue contains only trace of lecithine.View full abstractDownload PDF (203K) -
Fumio MATSUMOTO1950 Volume 16 Issue 7 Pages 306-310
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSSynopsis: Some experiments on the lecthine content in the pressed-oil and-cake of sardine prepared by the ordinary boiling-out process have been carriecl out and obtained the following results.
(1) As lecithine content of the pressid-oil is so poor and that of the pressed-cake so plenty, it seems that the lecithine remaines in the tissues very tightly and can not be separated unless extracted by organic solvents. In view of this fact, it is supposed that the pressed-oil originates chiefly from adipose tissue which contains only trace of lecithine.
(2) The lecithine in the pressed-cakes obtained by various drying-methods show different extractivity by solvent, viz. the higher the temperature or the longer the exposing to air, the lower the amount extracted.
(3) When the fish-meal made from pressed-cake is stored, the ether: extractives (crude fats) and the lecithine content in them decrease according to the elapse of time. And then these decrease occur remarkably in the earliar stage, and in lecithin than in crude fat.View full abstractDownload PDF (364K) -
Nutritive Value of Polymerized Sardine Oil. (1)Hideo HIGASHI, Takashi KANEDA1950 Volume 16 Issue 7 Pages 311-315
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSWe studied the nutritive value of polymerized sardine oil, having 6 different viscosity and compared it with hardened oil, by Rat-feeding.
The results obtained were as follows.
(1) As shown in table 3, the nutritive value of polymerized oils differ the grade of polymerization. Polymerized oils IV-V seems more calorific than original sardine oil.
(2) Polymerized oils VII and VIII are so viscous as paste, but those oils are not poisonous under our experimental condition.
We assumed by those results the toxic effects of polymer of unsaturated glycerides are neutralised with the components of yeast. This effective components of yeast are probably vitamin B complex.View full abstractDownload PDF (411K) -
I. The Durable Propety of the Threads of Synthetic FibersShozo DOI, Noriko KINKYO1950 Volume 16 Issue 7 Pages 316-318
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe durability of the threads of synthetic fibers (“Amylan” and “Vinylon”) for bacteria were very remarkable, viz. they kept their original strength in sea water for about 5 months, even without preservatives. Thus the need for renewing nets every few months or each year will soon become a matter of the past. The results obtained are shown in Figs 1-3.View full abstractDownload PDF (165K) -
II. The Effect of Weathering of the ThreadsShozo DOI1950 Volume 16 Issue 7 Pages 319-320
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSCotton-and “Vinylon”-threads were not influenced by about 100 days-weathering.
But the strength of “Amylan” -thread was reduced to 80% of its original strength for about 50 days and to 60% for about 100 days.View full abstractDownload PDF (101K) -
III. The Abrasion Resistance of the Threads.Shozo DOI1950 Volume 16 Issue 7 Pages 321-322
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe “Vinylon” -thread showed the abrasion resistance about two or three times as the cotton-thread.
The “Amylan” -thread exceeds the cotton thread in abraison resistance about 10 times or more and its strength remained almost unreduced after abrasion test.
The results of the experiments are shown in Tables.View full abstractDownload PDF (105K) -
Tomoyoshi YOSHIHARA1950 Volume 16 Issue 7 Pages 323-328
Published: December 25, 1950
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSLast year E. A. Rasor gave a method which enables us to calculate the constants of the Logistic curve. On the other hand M. Masuyama remarked the method on a footnote of his paper and gave the name “Method of Difference Diagram”. I devised the similar method a year before them, but did not published it. In 1946 L. A. Walford gave a new graphic method of describing the growth of animals. His method is to transform the growth curve into a straight line. By the three methods above-mentioned we can fransform the Logistic curve into a straight line. Masuyama and Rasor considered nothing but the case when the slope of line is smaller than unit. If the line passes the origin or did not cross the bisector of coordinates axes in the first quadrant, the growth curve will not represented by the Logistic equation. I found that in these cases we have several types of the Logistic type curve which Wilson and Puffer classified in their paper. In § 2, I will show how to get the Logistic equation by solving the difference cquation and why I can get the transformed line by plotting reciprocals of the growth data. Next, several types of the growth curve corres-ponding to each position of transformed line are presented. In § 3, the method of deter-mining constants of the Logistic type curves by graphic method and hypothetical examples and an application are given.View full abstractDownload PDF (275K)
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