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Volume 19, Issue 10
Displaying 1-12 of 12 articles from this issue
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III. Seaweeds (Part 2) and OthersYoshiro HASHIMOTO, Tokuji SATO1954 Volume 19 Issue 10 Pages 987-990
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe vitamin B12 content was determined on about thirty species seaweeds and a fresh-water alga by Euglena method, as listed in Table 1. No relation was observed between the vitamin content and the classes of seaweed, but the thin or finely branched seaweeds contained generally move vitamin B12. Asakusanori (an air-dried product of Porphyra tenera) was very rich and contained from 13.2 to 18.6 γ% B12. The utilization of marine algae as APF feed for domestic animals may be confined to only few species, if possible.
Several zoo- and phytoplanktons were also determined on their vitamin B12 content. (Table 2) Among zooplanktons tested, Daphnia showed relatively high vitamin B12 content and may be a good source of the vitamin for fish fry. The high content of the pure-cultured diatom, Skeletonema is noticeable, as the sea diatoms have been considered as the primary source of sea animal's food. Fresh-water unicellular algae, Mlcrocystis (Cyanophyceae) and Chlorella (Chlorophyceae) contained more vitamin B1 ?? , whereas Scenedesmus contained less. Another eight preparates of airdried Chlorella contained from 4.2 to 8.9, mean 6.1 γ% B12, which may be beneficial in the utilization of it as animal feed.
The bottom mud of fresh-water pond was very rich in vitamin B12, perhaps produced by soil micro-organisms. The unicellular algae and bottom mud may be possibly available for fishes as the good APF source.View full abstractDownload PDF (259K) -
Variations in the Vitamin B12 Content of Marine Animals in the SpoilageTakajiro MORI, Yoshiro HASHIMOTO, Yasuhiko MAEDA1954 Volume 19 Issue 10 Pages 991-996
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe vitamin B12 content was determined by Euglena method on the digested samples with trypsin.
In the spoilage of marine animals, the marked fluctuations of vitamin B12 content were obyer ?? ved, as shown in Table 1 and 2. As the recovery test of vitamin B12 with the putrid fish meat gave the same result as in the case of fresh meat, the variation mist be considered as the increase or decrease of vitamin B12 itself. As a whole, B12 content decreaecd generally when the round fishes were allowed to spoil, whereas the decrease was less or, on the contrary, the considerable increase was observed in some cases, when fishes were spoiled in the state of minced flesh or organs.
As the variation was prevented by the addition of toluene or by the cold storage at -2 ?? -5°C, the bacterial synthesis or decomposition seems to be the main cause of it (Tables 3-5). The vitamin B12 splitting enzyme was not detected on the glycerine and water extracts of mackerel liver and carp meat.View full abstractDownload PDF (362K) -
Tomokichi YOSHIHARA1954 Volume 19 Issue 10 Pages 997-1000
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSBased on the relation between the oxygen take up by fish and oxygen supply by the air pump into the water, a differential equation was deduced, from which the monomolecular law of reaction may be obtained. Putting different number of fish in the water, the oxgen content of water was deter mined, from which the oxygen consumption of fish have been calculated by the above relation.View full abstractDownload PDF (195K) -
JUNSAKU NONAKA1954 Volume 19 Issue 10 Pages 1001-1002
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSOn the oxidation with molecular oxygen followed by the treatment with gaseous ammonia, saturated n-fatty acids with carbon atoms not less than twelve suffer discoloration the more intensly with their increasing chain length, but never such having carbon atoms below ten.View full abstractDownload PDF (127K) -
III The Distribution of Urea and Trimethylamine Oxide in Different Parts of the BodyMichizo SUYAMA, Tadashi TOKUHIRO1954 Volume 19 Issue 10 Pages 1003-1006
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
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Tatsuyoshi MASUDA1954 Volume 19 Issue 10 Pages 1007-1011
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe followings may be mentioned as the results taken by the present investigation.
The differences of the length and the number of the segments of the flagella, due to right and left and due to sexes are denied within a per cent of risk (Tabs. 2-4). The length and number of the segments are in high correlation to body-length (Fig. 1), the correlation coefficients are 0.958 in length and 0.851 in number of the inner flagellum, 0.950 in length and 0.860 in number of the outer one, and 0.888 in number of the non-hair segments. The flagella appear to be avai-lable for age-determination of this lobster from puerulus to that of II-age, but to be useless for adult ones more than II-age, since the lengths and number of non-hair segments of inner and ou-ter flagella of the animal over II-age show no leap in relation to body-length. Finally it may be infered to be that the molt of this lobster per year takes place 10, 5, and 3 times for groups of I-age (20mm. long), II-age (93mm. long), and III-age (148-191mm. long) respectively. This result largely corresponds to those carried out by such workers : NAKAMURA(3), OSHIMA(5), and KUBO(2).View full abstractDownload PDF (341K) -
On the Relation between k and φ0 with a Table and a DiagramTomokichi YOSHIHARA1954 Volume 19 Issue 10 Pages 1012-1014
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSIn order to facilitate the calculation of φ0 from k a table and a diagram were made.View full abstractDownload PDF (121K) -
On the Smoking Conditions Affecting the Quantity of Deprived FormaldehydeKiichi MURATA, Keiichi OHOISHI1954 Volume 19 Issue 10 Pages 1015-1020
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThough there have been published a number of papers concerning the smoked food, no attempt has ever been made in preparing the smoke of favorable quality. Therefore, in this paper, using the filter paper as the smoking material, and with the equipment which is shown in the figure 1, the smoking conditions affecting the formation of formaldehyde are studied. The results obtained are as follows: larger amount of formaldehyde are produced from the moist sample, and when the sample is heated more quickly and more higher temperature.
The same tendency will be seen in the industrial smoking method using saw dust.View full abstractDownload PDF (336K) -
Tamotsu TAMURA1954 Volume 19 Issue 10 Pages 1021-1027
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESS(1) Tagging experiments were carried out in ponds with Mugii cephalus and Carassius auratus as the materials in order to test the twofold effects on the fish; the one was the wound directly inflicted by the tagging operation, and the other was the lengthy effect of the tag which lasted for a long time after the operation.
(2) In Mugil, the former effect was scarce; the mortality cases of the tagged fish in 23 days after their liberation were almost as little as that of untagged ones. The latter effect was, however, remarkable; the growth rate and fatness (Body weight/Body lengthy3) of the tagged fish in about ten months after the operation was much less than those of the untagged ones, and owing to the said ill effect lots of tagged fish died from the cold weather.
In Carassius, the either effect did not occur at all.
(3) The method usually used for estimating the stock of fish by the total catch and the recapturing rate of marked fish was examined with Cyprinus carpio and Carassius auratus. The conclusion was as follows: in marking or tagging experiments we should be careful for the method of fishing, i.e. when the fish caught by angling were marked and liberated in the pond, the rate of reangling of the marked fish was much larger than that of angling of unmarked ones, therefore the total stock of the fish underestimated.View full abstractDownload PDF (376K) -
Fatty Acids Composition of the Pacific Beaked Whale (Berardius bairdii) Oil (Part 3). On the Viscera OilMasamichi SAIKI1954 Volume 19 Issue 10 Pages 1028-1031
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe quantitative analysis of the fatty acids from the oil (table 1) has followed the general procedure described by T. P. Hilditch et al. (1) Solid and liquid fatty acids separated by lead saltalcohol method was converted into neutral methyl esters (table 2, 3), and these methyl esters were fractionated by distillation under reduced pressure. The results obtained are shown in table 4 and table 5. The composition of fatty acids calculated are shown in table 6.
The content of the saturated fatty acids was 10.6% and the unsaturated acids 89.4%. The saturated fatty acids consisted mainly of myristic, palmitic and a little quantity of stearic acids. The unsaturated fatty acids consisted of monoethenoid acids of C20, C18, C16, C22, C14 and a little quantity of C18, C20, C22 acids which were more unsaturated than monoethenoid. This viscera oil showed a considerably different fatty acid composition from that of the head and Jaw oil(3), but the composition resembles to that of the blubber oil(4).View full abstractDownload PDF (195K) -
Field Tests with the Sea Bass, Lateolabrax japonicus and Several Other SpeciesHideaki MIYAMOTO, Eiji SHIOTA1954 Volume 19 Issue 10 Pages 1032-1046
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
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Variation in the Vitamin A Content in Fish Meat by the Anatomical LocalityShuichi HIRAO, Juami YAMADA, Ryô KIKUCHI1954 Volume 19 Issue 10 Pages 1047-1056
Published: February 25, 1954
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSDownload PDF (548K)
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