Due to the special perianal location,anorectal diseases are prone to form chronic refractory wounds after surgery,with Qi(气)deficiency and blood stasis as the main cause.As a classical theory in TCM medicine,"si...Due to the special perianal location,anorectal diseases are prone to form chronic refractory wounds after surgery,with Qi(气)deficiency and blood stasis as the main cause.As a classical theory in TCM medicine,"simmering pus and forming flesh"attaches great importance to harmonizing Qi and blood in the wound healing period,which gradually achieves significant efficacy in clinical application after anorectal disease surgery.Literatures in recent years on"simmering pus and forming flesh"method being applied to postoperative wound healing in all kinds of anorectal diseases(such as anal fistula,perianal abscess,anal fissure,mixed hemorrhoid,etc.)were reviewed,and advantages and characteristics of its clinical efficacy in anorectal diseases were summarized,so as to provide reference for postoperative wound healing and repair treatment in anorectal diseases.展开更多
The removal of trace plutonium(Pu)from uranium products and organic wastes during spent nuclear fuel reprocessing remains a critical challenge,resulting in excessive plutonium content in uranium products and waste org...The removal of trace plutonium(Pu)from uranium products and organic wastes during spent nuclear fuel reprocessing remains a critical challenge,resulting in excessive plutonium content in uranium products and waste organic liquid.Currently,most organic ligands with selective separation functions are lipophilic,while research on water-soluble,highly selective ligands is relatively scarce,and there are also few reports on the single crystal of these ligands coordinating with plutonium.Herein,a hydrophilic multiamide ligand,N,N,N′,N″,N″-hexaethyl-nitrilotriacetamide(NTAamideC2),was synthesized and evaluated for its Pu(Ⅳ)back-extraction efficiency under harsh conditions.Systematic experiments revealed that NTAamideC2 achieved>99%Pu(Ⅳ)back-extraction rate within 15 min across a wide nitric acid concentration range(0-5 M),even with elevated dibutyl phosphate(DBP≤20000 ppm).Remarkably,the separation factor(SFPu/U)reached 767 at 1.5 M HNO_(3),demonstrating exceptional selectivity over uranium(Ⅵ).Spectrophotometric titration and DFT calculations confirmed the formation of 1:1 and 1:2 Pu(Ⅳ)-NTAamideC2 complexes,with log β values of 7.42±0.01 and 13.23±0.02,respectively.Single-crystal X-ray diffraction analysis of{[Pu_(2)(H_(2)O)_(2)(NTAamideC2)_(4)](H_(2)O)_(2)(NO_(3))(ClO_(4))_(7)}revealed a nine-coordinated PuO_(7)N_(2)geometry,where two NTAamideC2 molecules bind via six O and two N atoms.Compared to conventional agents(AHA/HSC),NTAamideC2 exhibited superior acid tolerance and selectivity,aligning with the CHON principle for sustainable nuclear waste management.This work provides a robust strategy for Pu(Ⅳ)removal in uranium purification cycles and advances fundamental insights into Pu coordination chemistry,offering significant potential for industrial nuclear fuel reprocessing.展开更多
基金Scientific Research Projects of China Medical Association of Minorities (2019KYXM-Z1119-80)General Projects in Natural Sciences of Science and Technology Department of Shaanxi Province (2020JM-588)Research and Development Projects in Science and Technology of Xianyang (2018K02-97)
文摘Due to the special perianal location,anorectal diseases are prone to form chronic refractory wounds after surgery,with Qi(气)deficiency and blood stasis as the main cause.As a classical theory in TCM medicine,"simmering pus and forming flesh"attaches great importance to harmonizing Qi and blood in the wound healing period,which gradually achieves significant efficacy in clinical application after anorectal disease surgery.Literatures in recent years on"simmering pus and forming flesh"method being applied to postoperative wound healing in all kinds of anorectal diseases(such as anal fistula,perianal abscess,anal fissure,mixed hemorrhoid,etc.)were reviewed,and advantages and characteristics of its clinical efficacy in anorectal diseases were summarized,so as to provide reference for postoperative wound healing and repair treatment in anorectal diseases.
基金supported by the China Institute of Atomic Energy。
文摘The removal of trace plutonium(Pu)from uranium products and organic wastes during spent nuclear fuel reprocessing remains a critical challenge,resulting in excessive plutonium content in uranium products and waste organic liquid.Currently,most organic ligands with selective separation functions are lipophilic,while research on water-soluble,highly selective ligands is relatively scarce,and there are also few reports on the single crystal of these ligands coordinating with plutonium.Herein,a hydrophilic multiamide ligand,N,N,N′,N″,N″-hexaethyl-nitrilotriacetamide(NTAamideC2),was synthesized and evaluated for its Pu(Ⅳ)back-extraction efficiency under harsh conditions.Systematic experiments revealed that NTAamideC2 achieved>99%Pu(Ⅳ)back-extraction rate within 15 min across a wide nitric acid concentration range(0-5 M),even with elevated dibutyl phosphate(DBP≤20000 ppm).Remarkably,the separation factor(SFPu/U)reached 767 at 1.5 M HNO_(3),demonstrating exceptional selectivity over uranium(Ⅵ).Spectrophotometric titration and DFT calculations confirmed the formation of 1:1 and 1:2 Pu(Ⅳ)-NTAamideC2 complexes,with log β values of 7.42±0.01 and 13.23±0.02,respectively.Single-crystal X-ray diffraction analysis of{[Pu_(2)(H_(2)O)_(2)(NTAamideC2)_(4)](H_(2)O)_(2)(NO_(3))(ClO_(4))_(7)}revealed a nine-coordinated PuO_(7)N_(2)geometry,where two NTAamideC2 molecules bind via six O and two N atoms.Compared to conventional agents(AHA/HSC),NTAamideC2 exhibited superior acid tolerance and selectivity,aligning with the CHON principle for sustainable nuclear waste management.This work provides a robust strategy for Pu(Ⅳ)removal in uranium purification cycles and advances fundamental insights into Pu coordination chemistry,offering significant potential for industrial nuclear fuel reprocessing.
