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Volume 20 (1951 - 195･･･
- Issue 6 Pages 399-
- Issue 5 Pages 311-
- Issue 4 Pages 221-
- Issue 3 Pages 169-
- Issue 2 Pages 79-
- Issue 1 Pages 1-
Predecessor
Volume 20, Issue 6
Displaying 1-14 of 14 articles from this issue
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Hisao ARUGA, Narumi YOSHITAKE, Shigeo ISHIKAWA1952 Volume 20 Issue 6 Pages 399-402
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSThe studies on the quantitative differences of xanthopterin-B and leucopterin-B making use of the normal (+lem) and lemon yellow (lem), yellow skin color of the silkworm have been done by the method of paper partition chromatography. These materials were extracted with 80% methyl alcohol and successively spoted on a filter paper, and developed by butanol acetic in the dark room. The color of fluorescence of substances was examined in ultra-violet light.
Xanthopterin-B is contained abundantly in the epidermis of the larva of lemon yellow, and exuded a little into the blood from the epidermis during the 4th moulting stage and is excreted a great quantity of it in faeces of the matured larva.
Leucopterin-B in the epidermis of normal (+lem) shows the resembled change to xanthopterin-B in that of lemon yellow, and the epidermis of lemon yellow contains smaller quantity of leucopterin-B than that of normal.View full abstractDownload PDF (354K) -
Kinsaku HASEGAWA1952 Volume 20 Issue 6 Pages 403-406
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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Shizuka SASAKI1952 Volume 20 Issue 6 Pages 407-412
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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Takashi KAWAI1952 Volume 20 Issue 6 Pages 413-417
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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Harutaro SATO, Shigemitsu TANAKA1952 Volume 20 Issue 6 Pages 418-422
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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(III) On the Rational Method of Food Giving from the Viewpoint of the Behavior of SilkwormYoshitake TAKEUCHI1952 Volume 20 Issue 6 Pages 423-430
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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(II) On the Pathogenicity of Muscardines and their Growth in the Insect-blood (1)Kiyosi AOKI, Yasuo NAKAZATO, Isao HUDIMOTO1952 Volume 20 Issue 6 Pages 431-438
Published: June 30, 1952
Released on J-STAGE: October 29, 2010
JOURNAL FREE ACCESS1) The pathogenic activity of white, red and yellow muscardine (Beauveria Bassiana VUILL., Isaria fumosorosea WIZE and Isaria farinosa FR. respectively) is most vigorous to the host insects on which they are most abundantly found, namely to domesticated silkworm (Bombyx mori L.), Kyoso-fly-pupa (Sturmia sericariae C.) and pyralid moth (Margaronia pyroalis W.) respectively.
2) White muscardine is more pathogenic to domesticated silkworm than to the wild silkworm (Theophila mandarina MOORE). The pathogenicity of this fungus is also influenced by the races of silkworm.
3) Although white muscardine is invariably pathogenic to domesticated silkworm regardless of the larval stage, the pathogenicity of green muscardine is conspicuously affected by the stage, being vigorous to the silkworm in earlier stage and faint to the one in late stage. The incubation period of green muscardine is longer than the one of white muscardine. The reason why green muscardine occurs simultaneously in the third moult was discussed.
4) The pathogenicity of white, red and yellow muscardines to silkworm, Kyoso-flp-pupa and pylarid moth respectively and the one of green muscardine to the various stages of domesticated silkworm were found to be directly proportional to the germinating rate of spores, the growth rate of germ-tube and the speed of cylindrical-spore-formation of the causal fungi in the insect's blood.View full abstractDownload PDF (799K) -
Narumi YOSHITAKE, Hisao ARUGA, Hyoichiro WATANABE1952 Volume 20 Issue 6 Pages 439-443
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSThe absorption curve of some marking pigments which have been imagined to be melanin was analysed by the spectrophotometric method making use of the normal (+p), Striped (pS), Moricaud (pM), Zebra (Ze), Multilunar (L), black dilute (bd), Ursa-pattern (U), Striped chocolate (pSch), and Striped dominant chocolate (pSI-a) strains. Owing to the absorption of the contaminations, further experiments are thought to be necessary to ascertain conclusively of the presence of melanin and ommochrome in the marking pigments, and of the differences between several mutants. But, from the result of our experiment, it is plausibly said that those pigments belong to melanin and are different from ommochrome, and further that tyrosine, polyphenol and quinone which participate in the quinone tanning and melanin formation have some influences on the absorption curve.View full abstractDownload PDF (572K) -
Toshifumi FUKUDA1952 Volume 20 Issue 6 Pages 444-447
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSStudies were undertaken in order to clarify the influence of carbohydrate on the development of the silkglands. Some of the silkworms [Si No. 108 (kyu)] were reared with the shaded mulberry leaves** (the amount of total sugar in the supplied leaves was 2.444g. per cent dry matter in the 4th instar and 2.579g. in the 5th instar), and others were fed with the leaves coated with glucose (a quantity of glucose corresponding to 10% of the leaves in weight was strewed upon the shaded leaves as uniformly as possible) from the commencement of the feeding period in the 4th or the 5th instar during 72 hours, And then, the rate of retention of the total ingested nitrogen was determined with the whole larval body, as well as with the silkglands (on comparing the date from the larvae which took up and ingested nearly the same amount of total nitrogen). ** It is recognized by many biochemists that the chemical component, especially carbohydrate in the mulberry leaves shaded with marsh reed screens from the sun decreases strikingly.
1. At the 4th and the 5th instar, the rate of the retention of total ingested nitrogen on the larvae was about 70% in the shaded leaves feeding and about 80% the feeding with the leaves coated with glucose.
2. At the 4th instar, the rate of the retention of the total nitrogen on the silkglands was about 2% with the shaded leaves and about 4% with the leaves coated with glucose. And at the 5th instar, the value was about 10% in the shaded case and about 18% with the glucose coating.View full abstractDownload PDF (479K) -
(I) Relation between Chemotropism of Silkworm and Attractants of Mulberry LeavesShuiku SASAKI, Tadao WATANABE, Yoshimasa TASAKA1952 Volume 20 Issue 6 Pages 448-452
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESS1) Forty kinds of leaves were investigated as to the chemotropism of silkworm. On the whole, these leaves exhibited more or less positive, and the leaves of soy-bean, mulberry and tea possessed the strong chemotropism.
2) Several kinds of commercial volatile acids, alcohols, aldehydes and ketones showed scarcely positive in this test.
3) Volatile substances were fractionated from the mulberry leaves. The neutral fraction (b. p. 100-170°C.) was positive, but the acidic and basic fractions were negative.View full abstractDownload PDF (1276K) -
Teikichi HOTTA1952 Volume 20 Issue 6 Pages 453-457
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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Fumio AIDA, Shigeyoshi FUJIWARA1952 Volume 20 Issue 6 Pages 458-465
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESS1) From the comparative observations on the stem color of mulberry trees belonging to 285 races grown in Tokyo district during winter, we have distinguished 17 different colors which may be grouped into 4.
2) Histological studies showed that the color of stem depends upon the color and number of cells in cork, cortex and epidermis layers, the first are suberised and are brownish, the second contain chloroplasts and are greenish, the last are grayish owing to wax and cutin covering the surface
3) The cork and cortex layers together give the ground color of the stem which is classified into 4 groups and the epidermis layer modifies it into 17 sub-groups.
4) When the waxy substance deposits on the whole surface of the stem, it shows even grayish color, while it is not so even when waxy substance depoits on only one part of the stem, e. g. on one side of the stem directing to the north.
5) In early spring when the ascent of sap begins, the color of stem becomes lighter owing to the change of green color of cortex layer.View full abstractDownload PDF (1030K) -
Fujio KATSUMATA1952 Volume 20 Issue 6 Pages 466
Published: June 30, 1952
Released on J-STAGE: July 01, 2010
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1952 Volume 20 Issue 6 Pages e1
Published: 1952
Released on J-STAGE: July 01, 2010
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