Based on theoretical calculation of electronegativity of groups of flotation reagent and method of infrared adsorption spectroscopy,the collection and adsorption of α-nitroso-β- naphthol in hematite flotation have b...Based on theoretical calculation of electronegativity of groups of flotation reagent and method of infrared adsorption spectroscopy,the collection and adsorption of α-nitroso-β- naphthol in hematite flotation have been studied.The chemical adsorption seems to be predominant owing to formation of pentacyclic nitrosyl chelate compound by atoms of nitrosyl bond in α-nitroso-β-naphthol together with Fe(Ⅲ)on hematite surface.Mean- while,the nonuniform multilayer physical adsorption is also occurred.展开更多
Kinetic and conductivity of new Schiff bases compounds such （（12Z）N-（5Z）-1-bromo-5-（phenylimino）-1H- pyrrol-2（5 H）-ylidene）benzenamine {ArN（CNBrCCHCH）NAr} （Ar = C6H5） incorporating the chelating diamino ...Kinetic and conductivity of new Schiff bases compounds such （（12Z）N-（5Z）-1-bromo-5-（phenylimino）-1H- pyrrol-2（5 H）-ylidene）benzenamine {ArN（CNBrCCHCH）NAr} （Ar = C6H5） incorporating the chelating diamino has been studied in this paper and was found a second order of this reaction. Electronic Properties using hyperchem program study has been improved for this compound such angel and bond distance, and then this compound was defining as electric conductivity and did prove to be useful for conduclively compound.展开更多
We investigated the Fe^(2+)chelating properties and the mechanism of improving Fe^(2+)bioavailability of the Fe^(2+)chelating peptide(GLPGPSGEEGKR,peptide-G-R).Fe^(2+)was chelated with the carboxyl oxygen atom of the ...We investigated the Fe^(2+)chelating properties and the mechanism of improving Fe^(2+)bioavailability of the Fe^(2+)chelating peptide(GLPGPSGEEGKR,peptide-G-R).Fe^(2+)was chelated with the carboxyl oxygen atom of the Glu-Glu residue in the form of monodentate and bidentate chelating mode.After chelation,peptide-G-R was folded and aggregated to form spherical particles with increasing particle size.Peptide-G-R could increase the Fe^(2+)transport/retention/uptake rate and the relative expression levels of divalent metal transporter 1(DMT1)in the Caco-2 cells monolayer model.Peptide-G-R could reverse the inhibition of phytic acid on the Fe^(2+)utilization in the Caco-2 cells monolayer model.Molecular dynamics simulation showed that peptide-G-R interacted with DMT1 in the form of intermolecular hydrogen bonds.The transport mechanism of the peptide-G-R-Fe^(2+)complex included endocytosis(main pathway),paracellular pathway(auxiliary way),and DMT1(potential pathway).Thus,peptide-G-R derived from tilapia skin collagen could be used as a dietary iron supplement.展开更多
文摘Based on theoretical calculation of electronegativity of groups of flotation reagent and method of infrared adsorption spectroscopy,the collection and adsorption of α-nitroso-β- naphthol in hematite flotation have been studied.The chemical adsorption seems to be predominant owing to formation of pentacyclic nitrosyl chelate compound by atoms of nitrosyl bond in α-nitroso-β-naphthol together with Fe(Ⅲ)on hematite surface.Mean- while,the nonuniform multilayer physical adsorption is also occurred.
文摘Kinetic and conductivity of new Schiff bases compounds such （（12Z）N-（5Z）-1-bromo-5-（phenylimino）-1H- pyrrol-2（5 H）-ylidene）benzenamine {ArN（CNBrCCHCH）NAr} （Ar = C6H5） incorporating the chelating diamino has been studied in this paper and was found a second order of this reaction. Electronic Properties using hyperchem program study has been improved for this compound such angel and bond distance, and then this compound was defining as electric conductivity and did prove to be useful for conduclively compound.
基金supported by the National Key R&D Program of China(2018YFD0901102)the Key-Area Research and Development Program of Guangdong Province(2020B020226005)+4 种基金the China Agriculture Research System of MOF and MARA(CARS-46)he National Natural Science Foundation of China(31301454)the Special Scientific Research Funds for Central Non-profit Institutes,Chinese Academy of Fishery Sciences(2020TD69)the Central Public-interest Scientific Institution Basal Research Funds,South China Sea Fisheries Research Institute,CAFS(2021SD06)the Pearl River S&T Nova Program of Guangzhou(201906010081).
文摘We investigated the Fe^(2+)chelating properties and the mechanism of improving Fe^(2+)bioavailability of the Fe^(2+)chelating peptide(GLPGPSGEEGKR,peptide-G-R).Fe^(2+)was chelated with the carboxyl oxygen atom of the Glu-Glu residue in the form of monodentate and bidentate chelating mode.After chelation,peptide-G-R was folded and aggregated to form spherical particles with increasing particle size.Peptide-G-R could increase the Fe^(2+)transport/retention/uptake rate and the relative expression levels of divalent metal transporter 1(DMT1)in the Caco-2 cells monolayer model.Peptide-G-R could reverse the inhibition of phytic acid on the Fe^(2+)utilization in the Caco-2 cells monolayer model.Molecular dynamics simulation showed that peptide-G-R interacted with DMT1 in the form of intermolecular hydrogen bonds.The transport mechanism of the peptide-G-R-Fe^(2+)complex included endocytosis(main pathway),paracellular pathway(auxiliary way),and DMT1(potential pathway).Thus,peptide-G-R derived from tilapia skin collagen could be used as a dietary iron supplement.
