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| 1 | Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis显示文摘Single-atom catalysts are of great interest because they can maximize the atom-utilization efficiency and generate unique catalytic properties;however,much attention has been paid to single-site active components,rarely to catalyst promoters.Promoters can significantly affect the activity and selectivity of a catalyst,even at their low concentrations in catalysts.In this work,we designed and synthesized CuO catalysts with atomically dispersed co-promoters of Sn and Zn.When used as the catalyst in the Rochow reaction for the synthesis of dimethyldichlorosilane,this catalyst exhibited much-enhanced activity,selectivity and stability compared with the conventional CuO catalysts with promoters in the form of nanoparticles.Density functional theory calculations demonstrate that single-atomic Sn substitution in the CuO surface can enrich surface Cu vacancies and promote dispersion of Zn to its atomic levels.Sn and Zn single sites as the co-promoters cooperatively generate electronic interaction with the CuO support,which further facilitates the adsorption of the reactant molecules on the surface,thereby leading to the superior catalytic performance. | Qi Shi Yongjun Ji Wenxin Chen Yongxia Zhu Jing Li Hezhi Liu Zhi Li Shubo Tian Ligen Wang Ziyi Zhong Limin Wang Jianmin Ma Yadong Li Fabing Su | 2020 | National Science Review2020，7，3： | 2 |
| 2 | Synthesis and shape memory behavior study of hyperbranched poly(urethane-tetrazole)显示文摘A novel hyperbranched poly(urethane-tetrazole)(HPUTZ) was synthesized via the 'A2+BB2' ' approach using hexadiisocyanate(HDI) and 3-(bis-(2-hydroxyethyl)) aminopropyltetrazole(HAPTZ).The molecular structure was characterized by FTIR and 1H NMR spectroscopy.The number average molecular weight was measured to be 1.05×104 g/mol with a polydispersity of 1.27 by GPC analysis.The HPUTZ was further cured by the semi-adduct(PEG-IPDI) from polyethylene glycol(PEG) reacting with isophorone diisocyanate(IPDI) to form the crosslinked HAPTZ-PU film in different ratio of HAPTZ to PEG-IPDI.The glass transition temperature of HAPTZ-PU increased from 44.9 to 56.4 ℃ as the HPUTZ content increased from 20% to 33% from the DSC analysis.The DMA results indicated that the HPUTZ-PU with 20% HPUTZ possessed the highest storage modulus and loss tangent.However,the storage modulus increased with the increasing of HPUTZ segment at higher temperature.The shape memory study showed that all the films presented the excellent shape memory function.Over 98% shape recovery could be obtained for the HAPTZ-PU with 20%-33% HAPTZ segment content within 60 s in the tension deformation test and within 40 s at 80 ℃ in the bend deformation test. | QIAO LiGen ASIF Anila SHI WenFang | 2011 | Science China Chemistry2011，54，9： | 1 |
| 3 | Effects of curcumin on glucose metabolism in the brains of rats subjected to chronic unpredictable stress:A18 F-FDG micro-PET study显示文摘 | Zheng Lin Ligen Shi Jing Lu | 2013 | Complementary and Alternative Medicine2013，13，： | 1 |
| 4 | A novel phenotype of B cells associated with enhanced phagocytic capability and chemotactic function after ischemic stroke显示文摘Accumulating evidence has demonstrated the involvement of B cells in neuroinflammation and neuroregeneration.However,the role of B cells in ischemic stroke remains unclear.In this study,we identified a novel phenotype of macrophage-like B cells in brain-infiltrating immune cells expressing a high level of CD45.Macrophage-like B cells chara cterized by co-expression of B-cell and macrophage markers,showed stronger phagocytic and chemotactic functions compared with other B cells and showed upregulated expression of phagocytosis-related genes.Gene Ontology analysis found that the expression of genes associated with phagocytosis,including phagosome-and lysosome-related genes,was upregulated in macrophage-like B cells.The phagocytic activity of macrophage-like B cells was ve rified by immunostaining and three-dimensional reconstruction,in which TREM2-labeled macrophage-like B cells enwrapped and internalized myelin debris after cerebral ischemia.Cell-cell interaction analysis revealed that macrophage-like B cells released multiple chemokines to recruit peripheral immune cells mainly via CCL pathways.Single-cell RNA sequencing showed that the transdiffe rentiation to macrophage-like B cells may be induced by specific upregulation of the transcription factor CEBP fa mily to the myeloid lineage and/or by downregulation of the transcription factor Pax5 to the lymphoid lineage.Furthermore,this distinct B cell phenotype was detected in brain tissues from mice or patients with traumatic brain injury,Alzheimer’s disease,and glioblastoma.Overall,these results provide a new perspective on the phagocytic capability and chemotactic function of B cells in the ischemic brain.These cells may serve as an immunotherapeutic target for regulating the immune response of ischemic stroke. | Rui Wang Huaming Li Chenhan Ling Xiaotao Zhang Jianan Lu Weimin Luan Jianmin Zhang Ligen Shi | 2023 | Neural Regeneration Research2023，18，11： | 1 |
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