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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Sericultural and Entomological Science
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Journal DOI :
Korean Society of Sericultural Science
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Volume & Issues
Volume 34, Issue 2 - Dec 1992
Volume 34, Issue 1 - Jun 1992
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Isolation of Chitinase Inhibitor-producing Microorganisms and Their Inhibitory Effect on Larval-Pupal Ecdysis
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 1~5
Crude fermentation broths of two bacterial isolates, S-11 and S-25, from about 200 soil samples, showed inhibitory activities against the crude chitinase prepared from alimentary canals of the silkworm, Bombyx mori, as well as against reagent chitinase from Streptomyces griseus, in vitro. The chitinase inhibitors also exhibited insecticidal activities by preventing larval-pupal ecdysis when these broths were injected into the silkworm larvae during spinning.
Effect of Sub-soil Drip Irrigation and Fertigation on Mulberry Yield
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 6~12
To study the effects of irrigation on the mulberry, 3 experiments were conducted. In experiment 1, four treatments, conventional (no irregation), drip irrigation, fertigation and fertigation with 20% extra fertilizer were examined. Irrigation hose was hurried at 20cm depth under the surface (Experiment 1). Water potential was controled at 0.1, 0.2, 0.5 and 1.0 bar to understand the optimum irrigation potential under rain-block system with plastic film hose(experiment 2). Five leading mulberry varieties, Cheongilppong, Youngcheonppong, Suseongppong, Kaeryangppong and Shinilppong were examined for irrigation response(experiment 3). Fertigation and fertigation with extra fefilizer increased yield by 22%, repectively compared with conventional. Irrigation increased by 8%, but with no significance statistically compared with the conventional. Irrigation, especially fertigation increased water content, P
O and CaO in leaves, suggested improving leaf quality in fall. Fertigation increased available P
content in the sub-soil. More root distribution showed at the sub-soil in fertigation. Weed did not occured in fertigation due to sub-soil fertilization, whereas the conventional received surface fertilization showed 931kg/10 a weed in fresh weight. No effect showed at the 20% extra fertilizer than the conventional amount Maximun yield showed at the 0.5 bar water potential. Irrigation increased yield by 22-25% with Cheongilppong and Yongcheonppong, and by 9-13% with Suseongppong, Shinilppong and Kaeryangppong.ong.
Relationship between Egg Size and Quantitative Characteristics in Silkworm, Bombyx mori
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 13~19
This study was investigated the relationship between egg size and manifestation of quantitative characteristics such as larval growth, cocoon weight and cocoon shell weight etc. There was a high positive correlation between egg size and body weight of newly hatched larva. Until 2nd instar, larval growth was affected by egg size. The body weight of grown larva from big eggs were heavier on all strains except for strain El6 and the larval duration from big egg were shorter on the Japanese and the Chinese skins. These facts show that the characteristics of larval body weight and larval duration were affected more by the strain than by the egg size. The cocoon characteristics of big eggs were better in comparison than those of regular eggs.
Location and Nucleotide Sequence of the Bombyx mori Nuclear Polyhedrosis Virus Polyhedrin Gene
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 20~25
The location of the polyhedrin gene of Bmbyx mori nuclear polyhedrosis virus(BmNPV) was determined by using a cloned polyhedrin gene from the Autographa californica nuclear polyhedrosis virus(AcNPV) as a hybridization probe. The 7.4 Kb PstⅠ fragment DNA of Bm-NPV was cloned to plasmid pUC19 vector. A fragment containing this gene was mapped and sequenced in its entire polyhedrin reading frame. Nucleotide sequences comparison of the polyhedrin of the BmNPV to that of previously reported by Ⅰatrou(1985) revealed that the sequence varied in 10 base, Comparison of the amino acid sequence of the two structured gene revealed that coding sequence varied 74 valine to isoleucine, 76 aspargine to serine and 155 methionine to valine.
Cross-Infection of Flacherie and Densonucleosis Virus of the Silkworm, Bombyx mori, to Mulberry Pests.
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 26~31
Flacherie virus (FV) and Densonucleosis virus (DNV) of the silkworm, Bombyx mori, which give the most severest damage to the silk production in korea, were fed on the mulberry wild silkworm, Bombyx mori mandarina, the mulberry pyralid, Gryphodes phyloalis, and the American fall webworm, Hypantria cunea, to investigate cross infectivity by serological and histopathological at observation. By the Ouchterlony's double difusion test the mulberry wild silkworm was infected with both FV and DNV type 1 (DNV-1) and the mulberry pyralid with DNV-1, so those were confirmed the cross infection. But the American fall webworm was not recognized the cross infection by the same method. The infection and multiplication of the FV in the mulberry wild silkworm was observed in the cytoplasm of the goblet cell with the appearance of the virus-specific vesicle. In DNV-1 infection to the mulberry wild silkworm and the mulberry pyralid, the nuclei of columnar cell in the midgut of both insects was hypertrophied and the nuclei of midgut cell of the mulberry pyralid positively stained with the feulgen stain. Multiplication of DNV-1 in the midgut cell of the mulberry wild silkworm was replicated in two different patterens as linear arrays and large masses, while that of DNV-1 in the muberry pyralid was multiplied as virus masses in several portion of the nuclei of the midgut cell.
Effects of Methacrylamide Treatment on Silk Fibers III. Polymerization Behavior of Methacrylamide
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 32~40
Many studies have been carried out on the graft finishing in order to improve the quality of silk fiber. Various vinyl monomers, for instance, styrene, methylmethacrylate, 2-hydroxyeth-ylmethacrylate and methacrylamide, have been used practically up to date. Among these monomers, methacrylamide has been applied as the most favourable monomer onto silk fibers in recent years. The polymerization mechanism about styrene- and methylmethacrylate-grafted silk fiber has been studied by many researchers. They proposed that free radicals were formed and vinyl monomers were polymerized in silk fibroin by graft polymerization mechanism, while active sites were varied by the types of monomer and initiator as well as by the reaction condition. In general. there is another Opinion that monomers are polymerized and impregnated in the internal side of the fiber by homopolymerization, which has not been proved experimentally yet More than 10 years have been passed since methacrylamide was applied on the silk fiber, and at the present time most finishings are being achieved by methacrylamide. However, no attention has been paid to the polymerization mechanism of the methacrylamide-treated silk fiber yeL In this paper, the treatments of methacrylamide on silk fibers were studied in aqueous solution using potassium persulfate as an initiator. The polymerization mechanism of the methacrylamide-treated silk fibers was investigated and analyzed on the basis of the results of infrared spectroscopy, amino acid analysis and scanning electron microscopy. From the results of these instrumental analyses, it can be suggested that polymerization mechanism about the methacrylamide-treated silk fibers is not performed by graft polymerization which has been accepted generally in styrene and methylmethacrylate-grafted silk fibers. The different mechanism is supposed to be due to the difference in monomer types, initiator types and treatment conditions.
Physicochemical Characteristics of Silk Fibroin Degummed by Protease in Bacillus licheniformis I. Physicochemical Characteristics of Degummed Silk Fiber
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 41~51
In this thesis, both soap and enzymatic degumming method were adopted and the optimum degumming conditions were obtained. Difference between the two degumming methods in silk fiber state was investigated and analyzed on the basis of the results of physical testings, polarizing microscopy, scanning electron microscopy, viscosity measurement, (
) amino group contents measurement, birefringence measurement, amino acid analysis, thermal analysis, infrared spectroscopy and x-ray diffraction analysis. The results obtained were summarized as follows; Physical test results of the degummed silk fiber showed that the tenacity and the elongation of enzymatic degummed silk fiber were lower than those of soap degummed fiber. But SEM observation and amino acid analysis showed almost the same tendency in the two degumming methods. The viscosity of enzymatic degummed silk fiber was lower than that of soap degummed fiber, but (
) amino group contents was higher in the enzymatic degummed fiber. It can be suggested that the enzymatic degummed silk fibroin was more degraded than the soap degummed fibroin. The birefringence, endothermic temperature of DSC spectrum, IR crystallinity and X-ray lateral order factor of enzymatic degummed silk fiber were higher than those of soap degummed fiber. It seems that the enzymatic degummed silk fiber has the higher crystallinity than that of soap degummed one according to the above results. However, it can be inferred that these differences between soap and enzymatic degummed fiber would be lessened if pretreatment and aftertreatment were included in the enzymatic degumming process.
The Studies of Low Temperature Dyeing on Silk Fibers I. Low Temperature Dyeing of Silk Fiber in the Milling Type Acid Dye
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 52~57
Using the new type auxiliary(K-1), dyeing experiment was done at the various dyeing conditions and the effects of auxiliary on the dyeing properties of acid milling dye for the silk fiber were dicussed. The results obtained were as follows; 1. The exhaust rate of acid milling dye was increased according to the auxiliary concentration at dyebath pH 7, But the increasing tendency of exhaust rate was decreased above auxiliary concentration 3% o. w. f.. 2. It was the same tendency of exhaust rate at dyebath pH 5, but the diffusion was more powerful at dyebath pH 7 than pH 5. 3. The decreasing ratio of exhaust rate according to dye concentration increasing was lower at auxiliary addition than auxiliary non-addition. 4. The exhaust rate curve according to increasing dyeing temperature showed the inflection point at auxiliary non-addition, but it was not observed in auxiliary addition. Consequently, it seems to be avoid that the occurrence of uneven dyeing at auxiliary addition.
1주일 양잠의 기술체계 확립
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 58~58
광식성 누에품종 육성
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 59~66
초저염 인공사료 및 초성력 누에사육기술의 개발
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 67~70
일주일 양잠과 다회육
Journal of Sericultural and Entomological Science, volume 34, issue 2, 1992, Pages 71~74