In this paper, the naturally occurred polymerization for rabbit metallothionein monomers has been studied in different milieu, while leaves out the aggregation caused by the oxidation of cysteine, since the latter cir...In this paper, the naturally occurred polymerization for rabbit metallothionein monomers has been studied in different milieu, while leaves out the aggregation caused by the oxidation of cysteine, since the latter circumstance was the result of purification lapsus. After the purification of metallothionein monomers, dynamic light scattering technique is used to detect the polymerized states of rabbit liver metallothionein Ⅰ and Ⅱ in different buffers, which is the first systematical detection of polymerized states of MTs in solutions. The effects of different factors contributing to methothionein aggregations have been investigated by computational simulations. The calculation results showed that the metallothionein polymerization would be regulated by many factors including electrostatic interactions, hydrophobic interactions and different ions in buffers. A molecular recognition mechanism of MTs polymerization in solutions is proposed on the bases of experimental results and theoretical calculations.展开更多
Modern carbon science lacks an efficient structure-related classification of materials. We present an approach based on dividing carbon materials by the aggregate state of the precursor. The common features in the str...Modern carbon science lacks an efficient structure-related classification of materials. We present an approach based on dividing carbon materials by the aggregate state of the precursor. The common features in the structure of carbon particles that allow putting them into a group are discussed, with particular attention to the potential energy stored in the carbon structure from different rates of relaxation during the synthesis and prearrangement of structural motifs due to the effect of the precursor structure.展开更多
The long-term storage of phosphate tailings will occupy a large amount of land,pollute soil and groundwater,thus,it is crucial to achieve the harmless disposal of phosphate tailings.In this study,high-performance geop...The long-term storage of phosphate tailings will occupy a large amount of land,pollute soil and groundwater,thus,it is crucial to achieve the harmless disposal of phosphate tailings.In this study,high-performance geopolymers with compressive strength of 38.8 MPa were prepared by using phosphate tailings as the main raw material,fly ash as the active silicon-aluminum material,and water glass as the alkaline activator.The solid content of phosphate tailings and fly ash was 60% and 40%,respectively,and the water-cement ratio was 0.22.The results of XRD,FTIR,SEM-EDS and XPS show that the reactivity of phosphate tailings with alkaline activator is weak,and the silicon-aluminum material can react with alkaline activator to form zeolite and gel,and encapsulate/cover the phosphate tailings to form a dense phosphate tailings-based geopolymer.During the formation of geopolymers,part of the aluminum-oxygen tetrahedron replaced the silicon-oxygen tetrahedron,causing the polycondensation reaction between geopolymers and increasing the strength of geopolymers.The leaching toxicity test results show that the geopolymer has a good solid sealing effect on heavy metal ions.The preparation of geopolymer from phosphate tailings is an important way to alleviate the storage pressure and realize the resource utilization of phosphate tailings.展开更多
文摘In this paper, the naturally occurred polymerization for rabbit metallothionein monomers has been studied in different milieu, while leaves out the aggregation caused by the oxidation of cysteine, since the latter circumstance was the result of purification lapsus. After the purification of metallothionein monomers, dynamic light scattering technique is used to detect the polymerized states of rabbit liver metallothionein Ⅰ and Ⅱ in different buffers, which is the first systematical detection of polymerized states of MTs in solutions. The effects of different factors contributing to methothionein aggregations have been investigated by computational simulations. The calculation results showed that the metallothionein polymerization would be regulated by many factors including electrostatic interactions, hydrophobic interactions and different ions in buffers. A molecular recognition mechanism of MTs polymerization in solutions is proposed on the bases of experimental results and theoretical calculations.
文摘Modern carbon science lacks an efficient structure-related classification of materials. We present an approach based on dividing carbon materials by the aggregate state of the precursor. The common features in the structure of carbon particles that allow putting them into a group are discussed, with particular attention to the potential energy stored in the carbon structure from different rates of relaxation during the synthesis and prearrangement of structural motifs due to the effect of the precursor structure.
基金Project(202202AG050010)supported by the Yunnan Major Scientific and Technological Projects,ChinaProject(202103AA080007)supported by the Key R&D Project of Science and Technology Department of Yunnan Province,ChinaProject(NECP2023-06)supported by the Open Project Fund of National Engineering and Technology Research Center for Development&Utilization of Phosphorous Resources,China。
文摘The long-term storage of phosphate tailings will occupy a large amount of land,pollute soil and groundwater,thus,it is crucial to achieve the harmless disposal of phosphate tailings.In this study,high-performance geopolymers with compressive strength of 38.8 MPa were prepared by using phosphate tailings as the main raw material,fly ash as the active silicon-aluminum material,and water glass as the alkaline activator.The solid content of phosphate tailings and fly ash was 60% and 40%,respectively,and the water-cement ratio was 0.22.The results of XRD,FTIR,SEM-EDS and XPS show that the reactivity of phosphate tailings with alkaline activator is weak,and the silicon-aluminum material can react with alkaline activator to form zeolite and gel,and encapsulate/cover the phosphate tailings to form a dense phosphate tailings-based geopolymer.During the formation of geopolymers,part of the aluminum-oxygen tetrahedron replaced the silicon-oxygen tetrahedron,causing the polycondensation reaction between geopolymers and increasing the strength of geopolymers.The leaching toxicity test results show that the geopolymer has a good solid sealing effect on heavy metal ions.The preparation of geopolymer from phosphate tailings is an important way to alleviate the storage pressure and realize the resource utilization of phosphate tailings.
