For wound healing,wound infection caused by bacteria is one of the important reasons that delay wound healing process.Therefore,it is very meaningful to develop a multifunctional wound dressing with antibacterial capa...For wound healing,wound infection caused by bacteria is one of the important reasons that delay wound healing process.Therefore,it is very meaningful to develop a multifunctional wound dressing with antibacterial capability to accelerate wound healing.Sodium alginate(SA)and carboxymethyl chitosan(CMCS)are the most commonly used compositions in wound dressing,but their poor stability inhibits the further applications.Introducing CMCS and using cerium ions(Ce^(3+))to crosslink CMCS and SA to form SA-CMCS hybrid spheres by electrostatic spray method,can not only improve the stability of SA hydrogels,but also endow the spheres with excelle nt antibacterial properties due to the characteristics of Ce^(3+).The gradual release of Ce^(3+)from the SA-CMCS spheres can effectively inhibit the growth of Staphylococcus aureus(S.aureus)and Escherichia coli(E.coli).Combining the wound healing promotion ability of SA and CMCS,this kind of wound dressing can not only avoid wound infection caused by bacteria effectively,but also accelerate wound healing,thus it is an easily prepared material with potential applications in skin defect repair.展开更多
We develop an efficient visible-light photoreodox-catalyzed hydrodecarboxylation and deuterodecarboxylation of fatty acids for alkanes and deuterium alkanes.The key to the efficient transformation should attribute to ...We develop an efficient visible-light photoreodox-catalyzed hydrodecarboxylation and deuterodecarboxylation of fatty acids for alkanes and deuterium alkanes.The key to the efficient transformation should attribute to the co-catalysis of the suitable methoxy substituted acridine photocatalyst(Mes-1,3,6,8-tetramethoxy-Acr-3″,5″-dimethoxy-Ph)and the hydrogen atom transfer catalyst 4′,4′-dimethyl diphenyldisulfane,possibly via facilitating of quenching the active alkyl radicals to overcome the competitive homocoupling products,olefins via the disproportionation,cracking products via the C—C bondβ-scission.展开更多
基金Project supported by the National Natural Science Foundation of China(52003124,21971117)China Postdoctoral Science Foundation(2020M680862)+10 种基金the Fundamental Research Funds for the Central UniversitiesNankai University(63211029,63186005,63211042)Tianjin Key Lab for Rare Earth Materials and Applications(ZB 19500202)the Open Funds(RERU2019001)of the State Key Laboratory of Rare Earth Resource Utilizationthe National Key R&D Program of China(2017YFA0208000)the 111 Project(B18030)from ChinaBeijing-Tianjin-Hebei Collaborative Innovation Project(19YFSLQY00030)the Outstanding Youth Project of Tianjin Natural Science Foundation(20JCJQJC00130)the Key Project of Tianjin Natural Science Foundation(20JCZDJC00650)the Basic Scientific Research Business Expenses of the Central UniversityOpen Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University(LZUMMM2021009)。
文摘For wound healing,wound infection caused by bacteria is one of the important reasons that delay wound healing process.Therefore,it is very meaningful to develop a multifunctional wound dressing with antibacterial capability to accelerate wound healing.Sodium alginate(SA)and carboxymethyl chitosan(CMCS)are the most commonly used compositions in wound dressing,but their poor stability inhibits the further applications.Introducing CMCS and using cerium ions(Ce^(3+))to crosslink CMCS and SA to form SA-CMCS hybrid spheres by electrostatic spray method,can not only improve the stability of SA hydrogels,but also endow the spheres with excelle nt antibacterial properties due to the characteristics of Ce^(3+).The gradual release of Ce^(3+)from the SA-CMCS spheres can effectively inhibit the growth of Staphylococcus aureus(S.aureus)and Escherichia coli(E.coli).Combining the wound healing promotion ability of SA and CMCS,this kind of wound dressing can not only avoid wound infection caused by bacteria effectively,but also accelerate wound healing,thus it is an easily prepared material with potential applications in skin defect repair.
基金supported by the National Nature Science Foundation of China(No.22171221)。
文摘We develop an efficient visible-light photoreodox-catalyzed hydrodecarboxylation and deuterodecarboxylation of fatty acids for alkanes and deuterium alkanes.The key to the efficient transformation should attribute to the co-catalysis of the suitable methoxy substituted acridine photocatalyst(Mes-1,3,6,8-tetramethoxy-Acr-3″,5″-dimethoxy-Ph)and the hydrogen atom transfer catalyst 4′,4′-dimethyl diphenyldisulfane,possibly via facilitating of quenching the active alkyl radicals to overcome the competitive homocoupling products,olefins via the disproportionation,cracking products via the C—C bondβ-scission.
