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Volume 43 (1974)
- Issue 6 Pages 445-
- Issue 5 Pages 361-
- Issue 4 Pages 277-
- Issue 3 Pages 195-
- Issue 2 Pages 105-
- Issue 1 Pages 1-
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Volume 43, Issue 5
Displaying 1-11 of 11 articles from this issue
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II. Effects of calcium salt application on mulberry growthHidejiro TAKAGISHI, Takaharu IIZUKA1974 Volume 43 Issue 5 Pages 361-368
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSFollowing the previous paper in which abnormal growth of mulberry plant on serpentineous soils was reported, the effects of calcium salt application on mulberry growth were studied as one of the measures for practical amelioration of these soils.
1. Pot experiments were carried out using two serpentineous soils. Each soil was treated by three types of calcium salts, carbonate, sulfate and phosphate to make the Ca/Mg me ratio on the basis of N-KCl soluble form 2 or 3.
2. Mulberry growth became very good and any abnormal symptoms did not appear by the application of the carbonate, but the injury was more enhanced by the sulfate. The beneficial effects of the phosphate on mulberry growth were recognized, but the symptoms were not lightened.
3. Carbonate application resulted in lowering of the soil acidity and decreasing of nickel uptake by mulberry plants, while the soil was more acidified and nickel uptake was increased by sulfate application.
4. From the above-mentioned results, the authors concluded that the effect of calcium application on mulberry growth was caused by the change of soil acidity, and not by the amelioration of calcium and magnesium composition of the soil.
5. Soil acidity to eliminate the toxic effect of serpentineous soils should be corrected according to nickel content in soil. In the present experiment, the estimated acidities were approximately pH (H2O) 7.5 for Miyake soil with 42ppm of neutral ammonium acetate soluble Ni and 6.5 for Asakura soil with 17ppm.
6. Antagonistic relation in the uptake between Ni and Zn and also Ni and Fe was recognized from the composition of these elements in leaves.View full abstractDownload PDF (2546K) -
Hiroshi DOIRA, Hajime KIHARA, Haruo CHIKUSHI1974 Volume 43 Issue 5 Pages 369-372
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSGenetical analysis of the small egg-2 (sm-2) gene was performed. It was shown that the sm-2 gene was independent from sm (3:41.8) but was linked with ch which had been mapped at 0.0 position on the thirteenth chromosome. The recombination value between ch and sm-2 was calculated as 9.55%. Mating experiments involving sm-2, ch and cf revealed that sm-2 gene was located to the left of ch. Hence the arrangement of gene loci on the thirteenth chromosome is revised as follows; sm-2: 0.0, ch: 9.6, cf: 20.9.View full abstractDownload PDF (493K) -
Hiroshi MORIMOTO1974 Volume 43 Issue 5 Pages 373-378
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSIn order to estimate the moisture regain and its partial distributed state on raw silk skeins or books especially wrapped in plastic films, a sample of raw silk was separatery permeated with various solutions of CoCl2 and NH4SCN, and SCN, and the characteristics of the color of the treated raw silk were studied. The most suitable ratio of CoCl2: NH4SCN for the indicator was 30:1, among various ratio tested (Table 1). The characteristics of color of the raw silk which was treated by this ratio of mixture were investigated under the various degree of relative humidity in the surrounding air. The results obtained were summarized as follows:
1) The above raw silk looked blue at 33.1% RH, light blue at 54.5% RH, blue purple at 76.0% RH, puple at 81.0% RH, light red at 93.8% RH by the human sence of vision under the standard light C.
2) In the results of color derived from data obtained by the spectronic color analyzer, the above raw silk showed the 2.5PB 6.6/4.5 to 5.4RP 7.3/2.4 in the Munsell marks of color, value, chroma, in the case of relative humidity of the air chacged from 33.1% to 93.8% RH at 20°C (Table 4).
3) The relation between the relative humidity (H) of the air and the reflecting percentage (R) of 655nm monochromatio light on the above raw silk at 20°C was shown approximately in an exponential curve and the quation is H=22.61e0.025R (Fig. 3).
4) The correlation between the reflecting percentage (R) of 655nm monochromatic light on the above raw silk and the moisture regain (M) of raw silk was found to be highly significant (r=0.99), and the line of regression of M on R was M=0.34R-2.47, and the estimated value of standard error about this regression line was 0.514 by the analysis of correlation (Fig. 5).View full abstractDownload PDF (643K) -
I. Fine structure of micropylar apparatusToshio KANDA, Hatsutaro MATSUMURA, Yoshiki OHTSUKI1974 Volume 43 Issue 5 Pages 379-383
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSThe surface structure of silkworm egg has been investigated by means of scanning electron microscope and differential interferencecontrast microscope. The matured eggs used in these experiments were taken out of oviduct in the adult moth of two silkworm strains, N124 and C124. With the evidences in the experiment, it was expected to describe the further fine structure of micropylar apparatus and the characteristics between strains.
The radiating gathers adhering were observed on the surface of central area in the petallike pattern of which micropylar apparatus was composed. Such gathers were not found in the outer area and the area was protruded as a knob which may envelop the other part of egg shell. This subtilized surface structure of the central area could indicate that the central area is not covered with outer layer of egg shell.
Small cavities found in the center of micropylar apparatus in N124 were polygone with 3-4 vertical angles, while the cavities in C124 were stellated struacute with 3-6 vertical angles. The significant difference in structure of small cavities between strains may be considered as a strain specificity.View full abstractDownload PDF (5725K) -
Yasuo HIRATA1974 Volume 43 Issue 5 Pages 384-390
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSSince there was a variation in the anylase activity of their larval digestive juice among ae strains the larvae of ae gene constitution were separated into two classes of the high and low amylase activities and its effect upon the several quantitative characters was examined by rearing the larvae of eight commercial inbred strains under three different nutritional conditions, normal leaves, hardened leaves and an artificial diet.
In all the rearing experiments, cocoon weight, cocoon shel weight, cocoon shell percentage, cocoon shell productivity per day in the 5th instar, and survival rate were higher in larvae of the high amylase activity than in thore of the low activity. Especially, these differences were remarkable when the larvae were reared on hardencd leaves or the artificical diet. In the rearing experiments of larvae of F1 hybrids between Japanese and Chinese inbred strains, however, the differences in these quantitative characters were not remarkable on account of the heterosis.
From these results, it may be concluded that the high amylase activity is advantageous for the commercial breeds of ae gene constitution.View full abstractDownload PDF (693K) -
Hideki SHIOZAKI, Yoshio TANAKA, Koichi SETOYAMA1974 Volume 43 Issue 5 Pages 391-393
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
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Kinji INOUE1974 Volume 43 Issue 5 Pages 394-400
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSWhen the larvae of the silkworm were injected with nuclear polyhedra, the granular cells (phagocytic lucocytes) phagocytosed the polyhedra and enclosed them into a phagosome. In an early stage of phagocytosis polyhedra were morphologically intact and acid phosphatase (AcPase) activity was observed in the phagosome. But in the advanced stage of phagocytosis, when the phagosome had been fused with the lysosome, polyhedra were transformed into spheres and AcPase activity was recognized not only on the external surface and internal matrix of polyhedra, but also on the occluded virions. Subsequently, the virions were degraded and there were large number of vacant spaces where virions had been occluded in the phagocytosed polyhedra. Such degraded polyhedra were frequently observed outside of the granular cell.
These results suggested that the phagocytosed polyhedra and their occluded virions were digested by lysosomal enzymes.View full abstractDownload PDF (10763K) -
Sueo URUSHIZAKI1974 Volume 43 Issue 5 Pages 401-404
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSThe author studied on the adsorption of hydrochloric acid and sodium hydroxide on the powdered activated carbon in pure water and on the sericin absorbability to the carbon in its influence on pH, electrolyte (ammonium sulfate) concentration, non-electrolyte (urea) concentration and temperature in M/5-Sørensen borate buffer solution. The results obtained are summarized as follows.
1. It is estimated that acidic and basic organic functional groups may exist on the surface of the carbon and the former may be fairly more than the latter.
2. The sericin which can be adsorbed by the carbon may be about 90% of the whole sericin and the sericin which cannot be by the carbon may be 10% of that.
3. The sericin which can be influenced on pH, electrolyte concentration in solution may be about 40% of the sericin which can be adsorbed and the sericin which cannot be on them may be about 60% of that.
4. It is considered that the adsorption of the 40% sericin may be closely related to the electrostatic interaction between this sericin and the carbon, and the adsorption of the 60% sericin may be to the hydrophobic interaction between that sericin and the carbon.View full abstractDownload PDF (393K) -
II. The infectivity to the several strains of the silkworm and serological characteristics of the virusYoji FURUTA1974 Volume 43 Issue 5 Pages 405-411
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
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Junro NUNOME1974 Volume 43 Issue 5 Pages 412-424
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESSDownload PDF (17024K) -
1974 Volume 43 Issue 5 Pages 425-426
Published: October 28, 1974
Released on J-STAGE: July 01, 2010
JOURNAL FREE ACCESS
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