[Objective] This study aimed to improve density and practicality of the ge- netic map of sunflower （Helianthus annuus L.） by adding some SSR markers. [Method] A total of 123 F8 RILs populations derived from a cross ...[Objective] This study aimed to improve density and practicality of the ge- netic map of sunflower （Helianthus annuus L.） by adding some SSR markers. [Method] A total of 123 F8 RILs populations derived from a cross between PAC-2 and RHA-266 were selected as the materials, and a total of 300 pairs of SSR primers were used to screen polymorphic markers between the parents and some of their RILs, and finally 51 pairs of the primers producing polymorphic patterns were selected to construct the genetic map of the RILs populations. [Result] Nineteen pairs of SSR primers did not generate polymorphic patterns or any bands, and 32 SSR pairs showed polymorphism. Thirty-five alleles which distributed in the 15 link- age groups of the maps were detected. The new map covered a total length of 2 914.5 cM, 7.5 cM longer than that of the original map. The average marker interval is 8.1 cM replacing original 9.0 cM. [Conclusion] This study provided reference for genetic map integration and molecular marker assisted selection of sunflower.展开更多
Potassium humate was extracted from brown coal. A novel super absorbent composite, poly （acrylic acid-co-acryla- mide）/potassium humate （PAA-AM/KHA）, was prepared by graft polymerization of acrylic acid, acrylamid...Potassium humate was extracted from brown coal. A novel super absorbent composite, poly （acrylic acid-co-acryla- mide）/potassium humate （PAA-AM/KHA）, was prepared by graft polymerization of acrylic acid, acrylamide and coal based potassium humate using N, N＇-methylenebisacrylamide as a crosslinker and potassium peroxydisulfate as an initiator. The effects of reaction temperature, degree of neutralization of the poly （acrylic acid） and the amounts of crosslinker, initiator and potassium humate were investigated. Salt resistance tests were also carded out. The composite prepared under optimal conditions had a potassium bumate content of 10% and exhibited a water absorption of 770 g/g in distilled water, and 349, 286 and 41 gig in 0.5 mol/L KC1, MgC12 and A1CI3 solutions respectively. The results indicate that the salt resistance of PAA-AM/KHA was superior to that of poly （acrylic acid-co-acrylamide） because of the collaborative effect of functional groups of the coal based potassium humate. The PAA-AM/KHA micro powder was characterized by IR spectroscopy and the micrographic surface was characterized by scanning electron microscopy. Introduction of potassium humate into the poly （acrylic acid-co-acrylamide） structure creates a composite more suitable for use as a water-managing material in the renewal of arid and desert environments. The salt resisting property of the composite is improved, production costs are reduced and the growth stimulant effect is still present.展开更多
Two novel fluorinated acrylate monomers 4a and 4b containing perfluorohexyl group were designed and synthesized starting from 4-allylanisole and perfluorohexyl iodide.The monomers 4a and 4b were then copolymerized wit...Two novel fluorinated acrylate monomers 4a and 4b containing perfluorohexyl group were designed and synthesized starting from 4-allylanisole and perfluorohexyl iodide.The monomers 4a and 4b were then copolymerized with octadecyl acrylate and 2-hydroxyethyl acrylate by emulsion polymerization to give copolymers PFA 1 and PFA 2 respectively.The co-polymers were characterized by FT-IR and their heat stability was measured by TGA.The surface properties of PFA 1 and PFA 2 were studied by applying on cotton fabrics.The treated cotton fabrics showed good water-repellent property,and the contact angles for water reached 142° for PFA 1 and 136° for PFA 2.展开更多
Simultaneous effects of conduction band non-parabolicity and hydrostatic pressure on the binding energies of 1S, 2S, and 2P states along with diamagnetic susceptibility of an on-center hydrogenic impurity confined in ...Simultaneous effects of conduction band non-parabolicity and hydrostatic pressure on the binding energies of 1S, 2S, and 2P states along with diamagnetic susceptibility of an on-center hydrogenic impurity confined in typical GaAs/Alx- Ga1-x As spherical quantum dots are theoretically investigated using the matrix diagonalization method. In this regard, the effect of band non-parabolieity has been performed using the Luttinger-Kohn effective mass equation. The binding energies and the diamagnetic susceptibility of the hydrogenic impurity are computed as a function of the dot radius and different values of the pressure in the presence of conduction band non-parabolicity effect. The results we arrived at are as follows： the incorporation of the band edge non-parabolicity increases the binding energies and decreases the absolute value of the diamagnetic susceptibility for a given pressure and radius; the binding energies increase and the magnitude of the diamagnetic susceptibility reduces with increasing pressure.展开更多
A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, salicylaldehyde and 2-hydroxy-1-naphthaldehyde. Three solid metal complexes of this ligand \[Ln(H2L)(NO3)\] NO3·2H2O (Ln=La, Sm, Ho) ...A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, salicylaldehyde and 2-hydroxy-1-naphthaldehyde. Three solid metal complexes of this ligand \[Ln(H2L)(NO3)\] NO3·2H2O (Ln=La, Sm, Ho) have been prepared and characterized by elemental analyses, IR spectra, UV spectra, TG-DTG and molar conductance. The antibacterial activities of the ligand and its complexes are also studied. The antibacterial experiments indicate that the ligand and its complexes possess antibacterial activity against Escherichia coli, Staphylococcus aureus and Bacillus subtilis and that the complexes have higher activity than those of the ligand.展开更多
In order to prepare water-oil repellent and fire retardant textile finishing agent, 1H ,1H,2H,2H-perfluorooctyl acrylate （FA） and acryloyloxy-1, 3-his （ diethylphosphoramidate ） propan （BisDEAEPN） were copolymer...In order to prepare water-oil repellent and fire retardant textile finishing agent, 1H ,1H,2H,2H-perfluorooctyl acrylate （FA） and acryloyloxy-1, 3-his （ diethylphosphoramidate ） propan （BisDEAEPN） were copolymerized with 2-hydroxyethyl acrylate （ HEA ） and stearyl methacrylate （ SMA ） by emulsion polymerization to form fluorinated phosphorus-eantaining acrylate copolymer （PFPA）. The copolymer was characterized by Fourier transform infrared spectroscopy （FT.IR） and the thermal stability was investigated by thermogravimetric analysis （TGA）. The emulsion was applied on cotton fabric and the surface properties of treated fabric were studied. The treated surface showed good repellent properties as contact angle for water reached 145° and for n-dodecane 110° respectively. The surface also showed some flame retardant property with 22.5 % of limited oxygen index （LOI）.展开更多
The seismic performance of precast reinforced concrete （RC） coupled shear walls is significantly influenced by coupling beams and the beam-to-wall joints during large deformations into plastic ranges. This study inv...The seismic performance of precast reinforced concrete （RC） coupled shear walls is significantly influenced by coupling beams and the beam-to-wall joints during large deformations into plastic ranges. This study investigated the use of engineered cementitious composite （ECC） in the cast-in-place beam-to-wall joints and the upper regions of the composite coupling beams as an innovative method to improve the seismic performance ofprecast RQ coupled shear walls. Two 1/2-scale precast coupled shear walls were tested under reversed cyclic loading and seismic behavior in terms of failure characteristic, mechanical characteristic value, load-displacement hysteresis curves, load-displacement envelope relationship, stiffness degradation, ductility and energy dissipation capacity were evaluated. Research results show that the substitution of concrete with ECC in the critical cast-in-place regions proved to be an effective method to improve the seismic performance of the two-story spatial of precast RC coupled shear walls.展开更多
To obtain an aqueous polymer system with good antibacterial properties, a series of gemini waterborne polyurethanes （GWPU） were designed and synthesized using isophorone diisocyanate, polyoxytetramethylene glycol, p...To obtain an aqueous polymer system with good antibacterial properties, a series of gemini waterborne polyurethanes （GWPU） were designed and synthesized using isophorone diisocyanate, polyoxytetramethylene glycol, poly（ethylene glycol）, L-lysine and a novel L-lysine-derivatized diamine containing gemini quaternary ammonium salt （EG12） without any other organic agent involved in the whole synthetic process. EG12 was first synthesized and characterized with proton nuclear mag- netic resonance spectra and mass spectra. The antibacterial activities of EG12 and GWPU were evaluated by quanti- fying the minimal inhibitory concentration. The results indicated that the gemini quaternary ammonium chain extender EG12 and GWPU showed excellent antibacterial activity against a broad spectrum of gram-positive and gram-negative bacteria. This work provides a new and facile approach to prepare novel antibacterial materials, which could be applied as coatings in various fields to prevent microbial contamination.展开更多
基金Supported by Major Transgenic Project of Ministry of Agriculture of China(No. 2011ZX08011-006)Research Fund for the Youth of Sichuan Academy of Agricultural Sciences(2012QQJJ-027)~~
文摘[Objective] This study aimed to improve density and practicality of the ge- netic map of sunflower （Helianthus annuus L.） by adding some SSR markers. [Method] A total of 123 F8 RILs populations derived from a cross between PAC-2 and RHA-266 were selected as the materials, and a total of 300 pairs of SSR primers were used to screen polymorphic markers between the parents and some of their RILs, and finally 51 pairs of the primers producing polymorphic patterns were selected to construct the genetic map of the RILs populations. [Result] Nineteen pairs of SSR primers did not generate polymorphic patterns or any bands, and 32 SSR pairs showed polymorphism. Thirty-five alleles which distributed in the 15 link- age groups of the maps were detected. The new map covered a total length of 2 914.5 cM, 7.5 cM longer than that of the original map. The average marker interval is 8.1 cM replacing original 9.0 cM. [Conclusion] This study provided reference for genetic map integration and molecular marker assisted selection of sunflower.
基金supports from the fundamental research funds for central universities and the National Nature Science Foundation of China (No2010-2012)
文摘Potassium humate was extracted from brown coal. A novel super absorbent composite, poly （acrylic acid-co-acryla- mide）/potassium humate （PAA-AM/KHA）, was prepared by graft polymerization of acrylic acid, acrylamide and coal based potassium humate using N, N＇-methylenebisacrylamide as a crosslinker and potassium peroxydisulfate as an initiator. The effects of reaction temperature, degree of neutralization of the poly （acrylic acid） and the amounts of crosslinker, initiator and potassium humate were investigated. Salt resistance tests were also carded out. The composite prepared under optimal conditions had a potassium bumate content of 10% and exhibited a water absorption of 770 g/g in distilled water, and 349, 286 and 41 gig in 0.5 mol/L KC1, MgC12 and A1CI3 solutions respectively. The results indicate that the salt resistance of PAA-AM/KHA was superior to that of poly （acrylic acid-co-acrylamide） because of the collaborative effect of functional groups of the coal based potassium humate. The PAA-AM/KHA micro powder was characterized by IR spectroscopy and the micrographic surface was characterized by scanning electron microscopy. Introduction of potassium humate into the poly （acrylic acid-co-acrylamide） structure creates a composite more suitable for use as a water-managing material in the renewal of arid and desert environments. The salt resisting property of the composite is improved, production costs are reduced and the growth stimulant effect is still present.
基金Programfor Changjiang Scholars and Innovative Research Teamin University,China(No.IRT0526)Shanghai Municipal Scientific Committee,China(No.08JC1400400)
文摘Two novel fluorinated acrylate monomers 4a and 4b containing perfluorohexyl group were designed and synthesized starting from 4-allylanisole and perfluorohexyl iodide.The monomers 4a and 4b were then copolymerized with octadecyl acrylate and 2-hydroxyethyl acrylate by emulsion polymerization to give copolymers PFA 1 and PFA 2 respectively.The co-polymers were characterized by FT-IR and their heat stability was measured by TGA.The surface properties of PFA 1 and PFA 2 were studied by applying on cotton fabrics.The treated cotton fabrics showed good water-repellent property,and the contact angles for water reached 142° for PFA 1 and 136° for PFA 2.
文摘Simultaneous effects of conduction band non-parabolicity and hydrostatic pressure on the binding energies of 1S, 2S, and 2P states along with diamagnetic susceptibility of an on-center hydrogenic impurity confined in typical GaAs/Alx- Ga1-x As spherical quantum dots are theoretically investigated using the matrix diagonalization method. In this regard, the effect of band non-parabolieity has been performed using the Luttinger-Kohn effective mass equation. The binding energies and the diamagnetic susceptibility of the hydrogenic impurity are computed as a function of the dot radius and different values of the pressure in the presence of conduction band non-parabolicity effect. The results we arrived at are as follows： the incorporation of the band edge non-parabolicity increases the binding energies and decreases the absolute value of the diamagnetic susceptibility for a given pressure and radius; the binding energies increase and the magnitude of the diamagnetic susceptibility reduces with increasing pressure.
文摘A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, salicylaldehyde and 2-hydroxy-1-naphthaldehyde. Three solid metal complexes of this ligand \[Ln(H2L)(NO3)\] NO3·2H2O (Ln=La, Sm, Ho) have been prepared and characterized by elemental analyses, IR spectra, UV spectra, TG-DTG and molar conductance. The antibacterial activities of the ligand and its complexes are also studied. The antibacterial experiments indicate that the ligand and its complexes possess antibacterial activity against Escherichia coli, Staphylococcus aureus and Bacillus subtilis and that the complexes have higher activity than those of the ligand.
文摘In order to prepare water-oil repellent and fire retardant textile finishing agent, 1H ,1H,2H,2H-perfluorooctyl acrylate （FA） and acryloyloxy-1, 3-his （ diethylphosphoramidate ） propan （BisDEAEPN） were copolymerized with 2-hydroxyethyl acrylate （ HEA ） and stearyl methacrylate （ SMA ） by emulsion polymerization to form fluorinated phosphorus-eantaining acrylate copolymer （PFPA）. The copolymer was characterized by Fourier transform infrared spectroscopy （FT.IR） and the thermal stability was investigated by thermogravimetric analysis （TGA）. The emulsion was applied on cotton fabric and the surface properties of treated fabric were studied. The treated surface showed good repellent properties as contact angle for water reached 145° and for n-dodecane 110° respectively. The surface also showed some flame retardant property with 22.5 % of limited oxygen index （LOI）.
基金supported by the National Key Research and Development Program of China(Grant No.2016YFC0701703)the Fundamental Research Funds for the Central Universities+1 种基金Project Supported by the Research and Innovation Program for Graduate Students in Jiangsu(Grant No.KYLX16_0257)A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(Grant No.CE02-2-47)
文摘The seismic performance of precast reinforced concrete （RC） coupled shear walls is significantly influenced by coupling beams and the beam-to-wall joints during large deformations into plastic ranges. This study investigated the use of engineered cementitious composite （ECC） in the cast-in-place beam-to-wall joints and the upper regions of the composite coupling beams as an innovative method to improve the seismic performance ofprecast RQ coupled shear walls. Two 1/2-scale precast coupled shear walls were tested under reversed cyclic loading and seismic behavior in terms of failure characteristic, mechanical characteristic value, load-displacement hysteresis curves, load-displacement envelope relationship, stiffness degradation, ductility and energy dissipation capacity were evaluated. Research results show that the substitution of concrete with ECC in the critical cast-in-place regions proved to be an effective method to improve the seismic performance of the two-story spatial of precast RC coupled shear walls.
基金This work was supported by the National Natural Science Foundation of China （51173118, 51273124, 51273126 and 51121001） and the National Science Fund for Distinguished Young Scholars of China （51425305）. We thank Prof. Zhang HR （Southwest University for Nationalities, Sichuan） for help with an- tibacterial test.
文摘To obtain an aqueous polymer system with good antibacterial properties, a series of gemini waterborne polyurethanes （GWPU） were designed and synthesized using isophorone diisocyanate, polyoxytetramethylene glycol, poly（ethylene glycol）, L-lysine and a novel L-lysine-derivatized diamine containing gemini quaternary ammonium salt （EG12） without any other organic agent involved in the whole synthetic process. EG12 was first synthesized and characterized with proton nuclear mag- netic resonance spectra and mass spectra. The antibacterial activities of EG12 and GWPU were evaluated by quanti- fying the minimal inhibitory concentration. The results indicated that the gemini quaternary ammonium chain extender EG12 and GWPU showed excellent antibacterial activity against a broad spectrum of gram-positive and gram-negative bacteria. This work provides a new and facile approach to prepare novel antibacterial materials, which could be applied as coatings in various fields to prevent microbial contamination.
