Alignment of silkworms and fish, observed as seismic anomalous animal behavior (SAAB) prior to the Kobe earthquake, were duplicated in a laboratory by applying a pulsed electric field assuming SAAB as electrophysiolog...Alignment of silkworms and fish, observed as seismic anomalous animal behavior (SAAB) prior to the Kobe earthquake, were duplicated in a laboratory by applying a pulsed electric field assuming SAAB as electrophysiological responses to the stimuli of seismic electric signals (SES). The animals became aligned perpendicularly to the field direction since their skeletal muscle had a higher resistivity perpendicular to the field direction than parallel to it. An electromagnetic model of a fault is proposed in which dipolar charges, ± q are generated due to the change of seismic stress, σ (t) . From a mathematical model,d q /d t=-α (d σ /d t) - q/ερ , where α is the charge generation constant like a piezoelectric coefficient, ε , the dielectric constant and ρ , the resistivity of bedrock granite. A fault having a length 2 a and a displacement or rock rupture time τ , during which the stress is changed, gives pulsed dipolar charge surface densities, +q(t, x) and -q(t, x+2a), or an apparent electric dipole moment of P(t)=2aQ(t)=2aAq(t)=αM 0[ερ/(τ-ερ)](e -t/τ -e -t/ερ ) using the earthquake moment M 0. The fault displacement, D , its initial velocity, D′ and the stress drop, Δ σ give τ=D/D′= (Δ σ/σ 0)(α/β) . The field intensity, F , and seismic current density at a fault zone, J were calculated as F=q/ε and J=F/ρ′ using ρ′ of water as to give J=0.1～1 A/m 2 sufficient to cause SAAB experimentally. The near field ultra low frequency (ULF) waves generated by P(t) give SES reciprocally proportional to the distance R .展开更多
Silkworm pupa is a nourishing food with high nutritional value,but its consumption has been greatly limited given its allergenicity.Enzyme hydrolytic technique is recognized as an effective method to reduce the allerg...Silkworm pupa is a nourishing food with high nutritional value,but its consumption has been greatly limited given its allergenicity.Enzyme hydrolytic technique is recognized as an effective method to reduce the allergenicity of protein.In this study,we aimed to investigate the effect of enzymolysis on the allergenicity of silkworm pupa.Crude silkworm pupa protein was extracted through alkali extraction and acid precipitation,which included 5 proteins with the molecular weights ranging from 34 kDa to 76 kDa,and silkworm pupa were then hydrolyzed by alkaline protease.The allergenicity of silkworm pupa protein and its enzymatic hydrolysates was evaluated by establishing BALB/c mice model,and the mice were immunized via intragastric gavage and intraperitoneal injection,respectively.The results indicated that the intraperitoneal inj ection immunization route induced more by detecting with antibodies,histamine and Th2-related cytokines.Moreover,mice treated with silkworm pupa protein peptide displayed no obvious allergic symptoms,indicating that enzyme hydrolytic technique could significantly reduce the allergenicity of silkworm pupa.展开更多
针对农村蚕桑生产中血液型脓病危害严重的现状,利用抗病种质资源,通过杂交和回交的方法选育出抗血液型脓病的家蚕四元杂交新品种明湖春江。国家和浙江省实验室鉴定结果显示,明湖春江4龄起蚕虫蛹率、出丝率与秋丰×白玉(对照)相仿,...针对农村蚕桑生产中血液型脓病危害严重的现状,利用抗病种质资源,通过杂交和回交的方法选育出抗血液型脓病的家蚕四元杂交新品种明湖春江。国家和浙江省实验室鉴定结果显示,明湖春江4龄起蚕虫蛹率、出丝率与秋丰×白玉(对照)相仿,万蚕产茧量分别比对照提高8.78%、11.25%;解舒丝长达900 m以上,超过对照;洁净高于94分。国家和浙江省农村生产试验的张种产茧量分别比对照提高15.36%、11.06%,健蛹率与对照相仿。抗血液型脓病检测结果表明,家蚕核型多角体病毒(Bombyx mori nucleopolyhedrosis,BmNPV)对明湖春江的LC_(50)值为3.102×10^(8)mL^(-1),对照为2.085×10^(6)mL^(-1)。新品种于2022年5月通过浙江省主要农作物品种审定委员会审定,并于2022年12月通过国家畜禽遗传资源委员会审定。该品种适合在长江流域和黄河流域秋期饲养。展开更多
[Objective] The aim of this research was to study the expression of silkworm attacin gene induced by some different microorganisms.[Method] Three kinds of microorganism,BmNPV,JM109 and Agrobacterium LBA4404,were inges...[Objective] The aim of this research was to study the expression of silkworm attacin gene induced by some different microorganisms.[Method] Three kinds of microorganism,BmNPV,JM109 and Agrobacterium LBA4404,were ingested to silkworm and the expression profile of attacin gene in hemocyte and fat body was detected by semi-quantitative PCR.And subsequently,the PCR products were cloned and sequenced for further analysis.[Result] A specific band,about 800 bp,appeared in fat body of all induced silkworms.As indicated by the results of cloning and sequencing(GenBank accession number:FJ373019),the band was produced because the 2 introns existing in normal expression form were not spliced.Furthermore,when the extended expression sequence was translated into amino acids,the translation stopped earlier by the stop codon TGA at the 5' end of the first intron of the original sequence,leading the loss of attacin C terminus.[Conclusion] There were two splicesomes of attacin gene,which had reference value to study the role of the attacin gene in silkworm immunity.展开更多
[Objective] The study aimed to breed eminent mulbery wild silb with hypersilk.[Method] Eminent mulberry wild silkworm basic materials Ye A and Ye B were bred by distant complex crossing of wild mulberry silkworm with ...[Objective] The study aimed to breed eminent mulbery wild silb with hypersilk.[Method] Eminent mulberry wild silkworm basic materials Ye A and Ye B were bred by distant complex crossing of wild mulberry silkworm with strong stress resistance and hypersilkgeneous silkworm,then hybridized with Japanese silkworm strain,the new silkworm variety "Yesanyuan" with healthiness and hypersilkgene was bred.[Ressult]The results of laboratory identification and rural productive test in Jiangsu Province showed that it has excellent feeding habit,strong stress resistance,high yield,excellent silk quality and excellent fecundity.The new silkworm variety "Yesanyuan" had been approved by Silkworm Variety Evaluation Commission of Jiangsu Province in 2008,it is suitable to rear in Yangtze River catchment for Spring and Autumn,North sericultural area for all-year.[Conclusion] The study is helpful for the development of silkworm industry.展开更多
文摘Alignment of silkworms and fish, observed as seismic anomalous animal behavior (SAAB) prior to the Kobe earthquake, were duplicated in a laboratory by applying a pulsed electric field assuming SAAB as electrophysiological responses to the stimuli of seismic electric signals (SES). The animals became aligned perpendicularly to the field direction since their skeletal muscle had a higher resistivity perpendicular to the field direction than parallel to it. An electromagnetic model of a fault is proposed in which dipolar charges, ± q are generated due to the change of seismic stress, σ (t) . From a mathematical model,d q /d t=-α (d σ /d t) - q/ερ , where α is the charge generation constant like a piezoelectric coefficient, ε , the dielectric constant and ρ , the resistivity of bedrock granite. A fault having a length 2 a and a displacement or rock rupture time τ , during which the stress is changed, gives pulsed dipolar charge surface densities, +q(t, x) and -q(t, x+2a), or an apparent electric dipole moment of P(t)=2aQ(t)=2aAq(t)=αM 0[ερ/(τ-ερ)](e -t/τ -e -t/ερ ) using the earthquake moment M 0. The fault displacement, D , its initial velocity, D′ and the stress drop, Δ σ give τ=D/D′= (Δ σ/σ 0)(α/β) . The field intensity, F , and seismic current density at a fault zone, J were calculated as F=q/ε and J=F/ρ′ using ρ′ of water as to give J=0.1～1 A/m 2 sufficient to cause SAAB experimentally. The near field ultra low frequency (ULF) waves generated by P(t) give SES reciprocally proportional to the distance R .
基金supported by Special Project on the Integration of Industry,Education and Research of Guangdong Provine(2013B090600060)National Key R&D Program of China(2018YFC1604205)National Natural Science Foundation of China(31760431)。
文摘Silkworm pupa is a nourishing food with high nutritional value,but its consumption has been greatly limited given its allergenicity.Enzyme hydrolytic technique is recognized as an effective method to reduce the allergenicity of protein.In this study,we aimed to investigate the effect of enzymolysis on the allergenicity of silkworm pupa.Crude silkworm pupa protein was extracted through alkali extraction and acid precipitation,which included 5 proteins with the molecular weights ranging from 34 kDa to 76 kDa,and silkworm pupa were then hydrolyzed by alkaline protease.The allergenicity of silkworm pupa protein and its enzymatic hydrolysates was evaluated by establishing BALB/c mice model,and the mice were immunized via intragastric gavage and intraperitoneal injection,respectively.The results indicated that the intraperitoneal inj ection immunization route induced more by detecting with antibodies,histamine and Th2-related cytokines.Moreover,mice treated with silkworm pupa protein peptide displayed no obvious allergic symptoms,indicating that enzyme hydrolytic technique could significantly reduce the allergenicity of silkworm pupa.
文摘针对农村蚕桑生产中血液型脓病危害严重的现状,利用抗病种质资源,通过杂交和回交的方法选育出抗血液型脓病的家蚕四元杂交新品种明湖春江。国家和浙江省实验室鉴定结果显示,明湖春江4龄起蚕虫蛹率、出丝率与秋丰×白玉(对照)相仿,万蚕产茧量分别比对照提高8.78%、11.25%;解舒丝长达900 m以上,超过对照;洁净高于94分。国家和浙江省农村生产试验的张种产茧量分别比对照提高15.36%、11.06%,健蛹率与对照相仿。抗血液型脓病检测结果表明,家蚕核型多角体病毒(Bombyx mori nucleopolyhedrosis,BmNPV)对明湖春江的LC_(50)值为3.102×10^(8)mL^(-1),对照为2.085×10^(6)mL^(-1)。新品种于2022年5月通过浙江省主要农作物品种审定委员会审定,并于2022年12月通过国家畜禽遗传资源委员会审定。该品种适合在长江流域和黄河流域秋期饲养。
基金Supported by Educational Commission of Shaanxi Province(08JK211)Special Scientific Research Foundation Project of Ankang University(AYQDZR200711)~~
文摘[Objective] The aim of this research was to study the expression of silkworm attacin gene induced by some different microorganisms.[Method] Three kinds of microorganism,BmNPV,JM109 and Agrobacterium LBA4404,were ingested to silkworm and the expression profile of attacin gene in hemocyte and fat body was detected by semi-quantitative PCR.And subsequently,the PCR products were cloned and sequenced for further analysis.[Result] A specific band,about 800 bp,appeared in fat body of all induced silkworms.As indicated by the results of cloning and sequencing(GenBank accession number:FJ373019),the band was produced because the 2 introns existing in normal expression form were not spliced.Furthermore,when the extended expression sequence was translated into amino acids,the translation stopped earlier by the stop codon TGA at the 5' end of the first intron of the original sequence,leading the loss of attacin C terminus.[Conclusion] There were two splicesomes of attacin gene,which had reference value to study the role of the attacin gene in silkworm immunity.
基金Supported by National Key Technology R&D Program(2006BAD06B03)~~
文摘[Objective] The study aimed to breed eminent mulbery wild silb with hypersilk.[Method] Eminent mulberry wild silkworm basic materials Ye A and Ye B were bred by distant complex crossing of wild mulberry silkworm with strong stress resistance and hypersilkgeneous silkworm,then hybridized with Japanese silkworm strain,the new silkworm variety "Yesanyuan" with healthiness and hypersilkgene was bred.[Ressult]The results of laboratory identification and rural productive test in Jiangsu Province showed that it has excellent feeding habit,strong stress resistance,high yield,excellent silk quality and excellent fecundity.The new silkworm variety "Yesanyuan" had been approved by Silkworm Variety Evaluation Commission of Jiangsu Province in 2008,it is suitable to rear in Yangtze River catchment for Spring and Autumn,North sericultural area for all-year.[Conclusion] The study is helpful for the development of silkworm industry.
