This paper summarized the diversity and prominent characteristics of naturally colored cocoon resources of Bombyx mori, and introduced the production methods of colored cocoons, the development and utilization of natu...This paper summarized the diversity and prominent characteristics of naturally colored cocoon resources of Bombyx mori, and introduced the production methods of colored cocoons, the development and utilization of naturally colored cocoon resources at home and abroad as well as the variety breeding instances, based on which suggestions were proposed for the development of colored cocoon industry.展开更多
[Objective] This study aimed to develop a new Bombyx mori variety Shuhuang No.1 and investigate its characteristics.[Method] The new variety was developed through cross breeding and pedigree separation.Its characteris...[Objective] This study aimed to develop a new Bombyx mori variety Shuhuang No.1 and investigate its characteristics.[Method] The new variety was developed through cross breeding and pedigree separation.Its characteristics were identified by laboratory tests and rural promotion practices in Sichuan Province.[Result]The cocoon produced by the new variety Shuhuang No.1 was golden-yellow and radiantly beautiful.Shuhuang No.1 was strong and easy to rear,uniform in development.The male and female ones could be distinguished by their larval color and markings.The cocoon yield per 10 000 the 4th instar larvae reached 20.30 kg; the length of a cocoon filament was about 1 115.0 m,and a non-broken filament was 882.95 mm long,accounting for 79.15％ of the total length.The raw silk ratio of fresh cocoon was 18.39％,and the neatness was 91.25 point.The main economic features of Shuhuang No.1 were better than those of the control.[Conclusion] The new variety had been approved by Sichuan Silkworm Evaluation Commission.It can be promoted in parent silkworm rearing areas Sichuan,Chongqing,Yangtze River basin.展开更多
Expression differences of flavonoid synthase I（BmFNS I）gene in the midgut,silk gland and fat body of the male and female Bombyx Mori with sex-identified fluorescent cocoon color were detected by fluorescence quantit...Expression differences of flavonoid synthase I（BmFNS I）gene in the midgut,silk gland and fat body of the male and female Bombyx Mori with sex-identified fluorescent cocoon color were detected by fluorescence quantitative PCR.The result showed that the relative expression level of BmFNS I gene in midgut of Bombyx Mori was the highest,followed by that in fat body,and the expression level in silk gland was the lowest,indicating that BmFNS I gene played an important role in flavonoids anabolism in mulberry leaves,which was the food of silkworm.However,there was no significant difference in BmFNS I gene expression level between midguts of male and female Bombyx Mori species with sex-identified fluorescent cocoon color,suggesting that there was no difference in flavonoids anabolism of mulberry leaves between the male and female Bombyx Mori with sex-identified fluorescent cocoon color,at least no difference in flavonoids anabolism regulated by FSN I gene.展开更多
Fluorescence/phosphorescence hybrid white organic light-emitting devices（WOLEDs） based on double emitting layers（EMLs） with high color stability are fabricated.The simplified EMLs consist of a non-doped blue therm...Fluorescence/phosphorescence hybrid white organic light-emitting devices（WOLEDs） based on double emitting layers（EMLs） with high color stability are fabricated.The simplified EMLs consist of a non-doped blue thermally activated delayed fluorescence（TADF） layer using 9,9-dimethyl-9,10-dihydroacridine-diphenylsulfone（DMAC-DPS） and an ultrathin non-doped yellow phosphorescence layer employing bis[2-（4-tertbutylphenyl）benzothiazolato-N,C2＇]iridium（acetylacetonate）（（tbt）_2Ir（acac））.Two kinds of materials of 4,7-diphenyl-1,10-phenanthroline（Bphen） and 1,3,5-tris（2-Nphenylbenzimidazolyl） benzene（TPBi） are selected as the electron transporting layer（ETL）,and the thickness of yellow EML is adjusted to optimize device performance.The device based on a 0.3-nm-thick yellow EML and Bphen exhibits high color stability with a slight Commission International de l＇Eclairage（CIE） coordinates variation of（0.017,0.009） at a luminance ranging from 52 cd/m^2 to 6998 cd/m^2.The TPBi-based device yields a high efficiency with a maximum external quantum efficiency（EQE）,current efficiency,and power efficiency of 10%,21.1 cd/A,and 21.3 lm/W,respectively.The ultrathin yellow EML suppresses hole trapping and short-radius Dexter energy transfer,so that Forster energy transfer（FRET）from DMAC-DPS to（tbt）_2Ir（acac） is dominant,which is beneficial to keep the color stable.The employment of TPBi with higher triplet excited state effectively alleviates the triplet exciton quenching by ETL to improve device efficiency.展开更多
文摘This paper summarized the diversity and prominent characteristics of naturally colored cocoon resources of Bombyx mori, and introduced the production methods of colored cocoons, the development and utilization of naturally colored cocoon resources at home and abroad as well as the variety breeding instances, based on which suggestions were proposed for the development of colored cocoon industry.
文摘[Objective] This study aimed to develop a new Bombyx mori variety Shuhuang No.1 and investigate its characteristics.[Method] The new variety was developed through cross breeding and pedigree separation.Its characteristics were identified by laboratory tests and rural promotion practices in Sichuan Province.[Result]The cocoon produced by the new variety Shuhuang No.1 was golden-yellow and radiantly beautiful.Shuhuang No.1 was strong and easy to rear,uniform in development.The male and female ones could be distinguished by their larval color and markings.The cocoon yield per 10 000 the 4th instar larvae reached 20.30 kg; the length of a cocoon filament was about 1 115.0 m,and a non-broken filament was 882.95 mm long,accounting for 79.15％ of the total length.The raw silk ratio of fresh cocoon was 18.39％,and the neatness was 91.25 point.The main economic features of Shuhuang No.1 were better than those of the control.[Conclusion] The new variety had been approved by Sichuan Silkworm Evaluation Commission.It can be promoted in parent silkworm rearing areas Sichuan,Chongqing,Yangtze River basin.
基金Supported by the Major State Basic Research Development Program of China(863Program)(2006AA10A118)Natural Science Foundation of the Higher Education Institutions of Jiangsu Province,China(07KJB230102)~~
文摘Expression differences of flavonoid synthase I（BmFNS I）gene in the midgut,silk gland and fat body of the male and female Bombyx Mori with sex-identified fluorescent cocoon color were detected by fluorescence quantitative PCR.The result showed that the relative expression level of BmFNS I gene in midgut of Bombyx Mori was the highest,followed by that in fat body,and the expression level in silk gland was the lowest,indicating that BmFNS I gene played an important role in flavonoids anabolism in mulberry leaves,which was the food of silkworm.However,there was no significant difference in BmFNS I gene expression level between midguts of male and female Bombyx Mori species with sex-identified fluorescent cocoon color,suggesting that there was no difference in flavonoids anabolism of mulberry leaves between the male and female Bombyx Mori with sex-identified fluorescent cocoon color,at least no difference in flavonoids anabolism regulated by FSN I gene.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61675041 and 61605253)the Foundation for Innovation Research Groups of the National Natural Science Foundation of China(Grant No.61421002)the Science&Technology Department Program of Sichuan Province,China(Grant No.2016HH0027)
文摘Fluorescence/phosphorescence hybrid white organic light-emitting devices（WOLEDs） based on double emitting layers（EMLs） with high color stability are fabricated.The simplified EMLs consist of a non-doped blue thermally activated delayed fluorescence（TADF） layer using 9,9-dimethyl-9,10-dihydroacridine-diphenylsulfone（DMAC-DPS） and an ultrathin non-doped yellow phosphorescence layer employing bis[2-（4-tertbutylphenyl）benzothiazolato-N,C2＇]iridium（acetylacetonate）（（tbt）_2Ir（acac））.Two kinds of materials of 4,7-diphenyl-1,10-phenanthroline（Bphen） and 1,3,5-tris（2-Nphenylbenzimidazolyl） benzene（TPBi） are selected as the electron transporting layer（ETL）,and the thickness of yellow EML is adjusted to optimize device performance.The device based on a 0.3-nm-thick yellow EML and Bphen exhibits high color stability with a slight Commission International de l＇Eclairage（CIE） coordinates variation of（0.017,0.009） at a luminance ranging from 52 cd/m^2 to 6998 cd/m^2.The TPBi-based device yields a high efficiency with a maximum external quantum efficiency（EQE）,current efficiency,and power efficiency of 10%,21.1 cd/A,and 21.3 lm/W,respectively.The ultrathin yellow EML suppresses hole trapping and short-radius Dexter energy transfer,so that Forster energy transfer（FRET）from DMAC-DPS to（tbt）_2Ir（acac） is dominant,which is beneficial to keep the color stable.The employment of TPBi with higher triplet excited state effectively alleviates the triplet exciton quenching by ETL to improve device efficiency.
