A novel hydroxamic acid,N-hydroxy-9,10-epoxy group-octadecanamide(N-OH-9,10-O-ODA),was synthesised by modifying the structure of oleic acid.The carboxyl group of oleic acid was converted into an N-hydroxy amide group,...A novel hydroxamic acid,N-hydroxy-9,10-epoxy group-octadecanamide(N-OH-9,10-O-ODA),was synthesised by modifying the structure of oleic acid.The carboxyl group of oleic acid was converted into an N-hydroxy amide group,and an epoxy group was introduced into its structure.N-OH-9,10-O-ODA was used as a novel collector in the flotation separation of spodumene from one of its associated gangue minerals,specifically albite.N-OH-9,10-O-ODA exhibits remarkable selectivity,with a stronger affinity for collecting spodumene particles compared to albite particles.Zeta potential measurements and X-ray photoelectron spectroscopic analysis reveal that the adsorption quantity of N-OH-9,10-O-ODA on spodumene surface is comparable to that on albite surface.First-principles calculations demonstrate the diverse adsorption configurations of N-OH-9,10-O-ODA on surfaces of spodumene and albite,leading to its distinct collecting abilities for spodumene and albite particles.展开更多
Bastnaesite((Ce,La,Pr,Nd)CO_(3)F) is a significant light rare earth mineral found in nature,known for its fine-grained properties.Flotation is commonly employed for the recovery of fine-grained bastnaesite particles.C...Bastnaesite((Ce,La,Pr,Nd)CO_(3)F) is a significant light rare earth mineral found in nature,known for its fine-grained properties.Flotation is commonly employed for the recovery of fine-grained bastnaesite particles.Collectors serve as an essential flotation reagent that enhance the surface hydrophobicity of target minerals.A novel collector,N-hydroxy-9-octadecenamide(N-OH-9-ODA),was synthesised in this study.N-OH-9-ODA exhibits superior selectivity compared to the traditional collector oleic acid in the flotation separation of bastnaesite and fluorite.The experimental and co mputational results indicate that N-OH-9-ODA exhibits superior selectivity due to its higher adsorption affinity for bastnaesite surface compared to fluorite surface.The zeta potential and the binding energies of the Ce 3d peaks in the X-ray photoelectron spectrum(XPS) of bastnaesite surface exhibit significant shifts.Conversely,fluorite surface demonstrates minimal alterations in its zeta potential and the binding energies of the Ca 2p peaks in its XPS after its interaction with N-OH-9-ODA.展开更多
目的探讨T细胞免疫球蛋白黏蛋白分子(Tim-3)及半乳糖凝集素-9(Galectin-9)的表达与肿瘤T细胞免疫在鼻咽癌中的临床意义。方法在癌症基因组图谱计划(The Cancer Genome Atlas,TCGA)数据库中查找Tim-3在各种肿瘤组织中的表达情况,选取与...目的探讨T细胞免疫球蛋白黏蛋白分子(Tim-3)及半乳糖凝集素-9(Galectin-9)的表达与肿瘤T细胞免疫在鼻咽癌中的临床意义。方法在癌症基因组图谱计划(The Cancer Genome Atlas,TCGA)数据库中查找Tim-3在各种肿瘤组织中的表达情况,选取与鼻咽癌患者免疫密切相关的基因Tim-3及其配体Galectin-9作为研究基因;收集2018年3月~2022年3月广西壮族自治区民族医院收治的65例鼻咽癌患者的肿瘤组织、同期65例鼻咽部炎性标本组织及对应鼻咽癌患者放疗前后应用免疫细胞病理芯片技术检测的外周血T细胞亚群变化的数据,并做随访观察。结果生物信息学分析TCGA数据库中鼻咽癌的测序数据,结果显示,Tim-3在大部分肿瘤组织中呈高表达,在鼻咽癌组织中较癌旁正常组织表达水平显著上调,Tim-3及其配体Galectin-9在癌组织中的表达呈正相关;免疫组化结果显示,鼻咽癌组织中Tim-3和Galectin-9的表达水平均显著高于鼻咽部炎性组织(P<0.05);鼻咽癌组织中Tim-3和Galectin-9高表达与淋巴结受累(P<0.05)以及更晚的TNM分期(P<0.05)紧密相关;Tim-3和Galectin-9的表达水平与患者年龄、性别及EB病毒感染等因素无关(P>0.05);Tim-3和Galectin-9在鼻咽癌中的表达呈正相关(r=0.313,P=0.011);随访发现,Tim-3和Galectin-9的高表达可能与鼻咽癌的不良预后相关;鼻咽癌患者放疗前3天和放疗后7天的T淋巴细胞亚群检测显示,CD4+、CD4+/CD8+较放疗前显著下降(P<0.05),CD3+与CD8+变化差异无统计学意义(P>0.05);Tim-3和Galectin-9蛋白阳性组患者放疗敏感度明显高于于Tim-3和Galectin-9阴性组(P<0.05)。结论Tim-3/Galectin-9信号通路在鼻咽癌发生、发展和转移中起重要作用,T细胞免疫在鼻咽癌治疗中发挥重要作用。联合检测鼻咽癌组织中Tim-3和Galectin-9及T细胞亚群的变化可能为临床评估肿瘤监测病情及肿瘤免疫治疗提供新参数。展开更多
基金financial support from the National Natural Science Foundation of China(Nos.91962223,52104287,U2067201)Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources and Open Foundation of State Key Laboratory of Mineral Processing,China(No.BGRIMM-KJSKL-2022-14)。
文摘A novel hydroxamic acid,N-hydroxy-9,10-epoxy group-octadecanamide(N-OH-9,10-O-ODA),was synthesised by modifying the structure of oleic acid.The carboxyl group of oleic acid was converted into an N-hydroxy amide group,and an epoxy group was introduced into its structure.N-OH-9,10-O-ODA was used as a novel collector in the flotation separation of spodumene from one of its associated gangue minerals,specifically albite.N-OH-9,10-O-ODA exhibits remarkable selectivity,with a stronger affinity for collecting spodumene particles compared to albite particles.Zeta potential measurements and X-ray photoelectron spectroscopic analysis reveal that the adsorption quantity of N-OH-9,10-O-ODA on spodumene surface is comparable to that on albite surface.First-principles calculations demonstrate the diverse adsorption configurations of N-OH-9,10-O-ODA on surfaces of spodumene and albite,leading to its distinct collecting abilities for spodumene and albite particles.
基金supported by National Natural Science Foundation of China (52104287,91962223)Hubei Key Laboratory for Efficient Utilisation and Agglomeration of Metallurgic Mineral ResourcesOpen Foundation of State Key Laboratory of Mineral Processing (BGRIMM-KJSKL-2022-14)。
文摘Bastnaesite((Ce,La,Pr,Nd)CO_(3)F) is a significant light rare earth mineral found in nature,known for its fine-grained properties.Flotation is commonly employed for the recovery of fine-grained bastnaesite particles.Collectors serve as an essential flotation reagent that enhance the surface hydrophobicity of target minerals.A novel collector,N-hydroxy-9-octadecenamide(N-OH-9-ODA),was synthesised in this study.N-OH-9-ODA exhibits superior selectivity compared to the traditional collector oleic acid in the flotation separation of bastnaesite and fluorite.The experimental and co mputational results indicate that N-OH-9-ODA exhibits superior selectivity due to its higher adsorption affinity for bastnaesite surface compared to fluorite surface.The zeta potential and the binding energies of the Ce 3d peaks in the X-ray photoelectron spectrum(XPS) of bastnaesite surface exhibit significant shifts.Conversely,fluorite surface demonstrates minimal alterations in its zeta potential and the binding energies of the Ca 2p peaks in its XPS after its interaction with N-OH-9-ODA.
文摘目的探讨T细胞免疫球蛋白黏蛋白分子(Tim-3)及半乳糖凝集素-9(Galectin-9)的表达与肿瘤T细胞免疫在鼻咽癌中的临床意义。方法在癌症基因组图谱计划(The Cancer Genome Atlas,TCGA)数据库中查找Tim-3在各种肿瘤组织中的表达情况,选取与鼻咽癌患者免疫密切相关的基因Tim-3及其配体Galectin-9作为研究基因;收集2018年3月~2022年3月广西壮族自治区民族医院收治的65例鼻咽癌患者的肿瘤组织、同期65例鼻咽部炎性标本组织及对应鼻咽癌患者放疗前后应用免疫细胞病理芯片技术检测的外周血T细胞亚群变化的数据,并做随访观察。结果生物信息学分析TCGA数据库中鼻咽癌的测序数据,结果显示,Tim-3在大部分肿瘤组织中呈高表达,在鼻咽癌组织中较癌旁正常组织表达水平显著上调,Tim-3及其配体Galectin-9在癌组织中的表达呈正相关;免疫组化结果显示,鼻咽癌组织中Tim-3和Galectin-9的表达水平均显著高于鼻咽部炎性组织(P<0.05);鼻咽癌组织中Tim-3和Galectin-9高表达与淋巴结受累(P<0.05)以及更晚的TNM分期(P<0.05)紧密相关;Tim-3和Galectin-9的表达水平与患者年龄、性别及EB病毒感染等因素无关(P>0.05);Tim-3和Galectin-9在鼻咽癌中的表达呈正相关(r=0.313,P=0.011);随访发现,Tim-3和Galectin-9的高表达可能与鼻咽癌的不良预后相关;鼻咽癌患者放疗前3天和放疗后7天的T淋巴细胞亚群检测显示,CD4+、CD4+/CD8+较放疗前显著下降(P<0.05),CD3+与CD8+变化差异无统计学意义(P>0.05);Tim-3和Galectin-9蛋白阳性组患者放疗敏感度明显高于于Tim-3和Galectin-9阴性组(P<0.05)。结论Tim-3/Galectin-9信号通路在鼻咽癌发生、发展和转移中起重要作用,T细胞免疫在鼻咽癌治疗中发挥重要作用。联合检测鼻咽癌组织中Tim-3和Galectin-9及T细胞亚群的变化可能为临床评估肿瘤监测病情及肿瘤免疫治疗提供新参数。
