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| 1 | Synthesis of carbon dots with a tunable photoluminescence and their applications for the detection of acetone and hydrogen peroxide显示文摘Carbon dots(CDs) with multi-color emissive properties and a high photoluminescent quantum yield(PLQY) have attracted great attention recently due to their potential applications in chemical,environmental,biological and photo-electronic fields.Solvent-dependent effect in photoluminescence provides a facial and effective approach to tune the emission of CDs.In this study,green emissive nitrogen-doped carbon dots(N-CDs) are synthesized from p-hydroquinone and ethylenediamine through a simple hydrothermal method.The as-prepared N-CDs possess a robust excitation-independent green luminescence and a high PLQY of up to 15.9%.Further spectroscopic characterization indicates that the high PLQY is achieved by the balance of nitrogen doping states and the surface passivation extent in CDs.The N-CDs also exhibit solvent-dependent multi-color emissive property and distinct PLQY in different solvents(the maximum can reach up to 25.3%).Furthermore,the as-prepared N-CDs are applied as fluorescence probes to detect acetone and H2O2 in water.This method has exhibited a low detection limit of acetone(less than 0.1 %) and a quick and linear response to the H_2O_2 with the concentration from 0 to 120 μmol/L.This work broadens the knowledge of applying CDs as probes in the bio and chemical sensing fields. | Shitong Cui Yanfen Wu Yao Liu Qingwen Guan Yida Zhang Yilin Zhang Song Luo Meng Xu Juncheng Wang | 2020 | Chinese Chemical Letters2020，31，2： | 1 |
| 2 | PRMT1 promotes the proliferation and metastasis of gastric cancer cells by recruiting MLXIP for the transcriptional activation of theβ-catenin pathway显示文摘Protein arginine methyltransferase 1(PRMT1),a type I PRMT,is overexpressed in gastric cancer(GC)cells.To elucidate the function of PRMT1 in GC,PRMT1 expression in HGC-27 and MKN-45 cells was knocked down by short hairpin RNA(shRNA)or inhibited by PRMT1 inhibitors(AMI-1 or DCLX069),which resulted in inhibition of GC cell proliferation,migration,invasion,and tumorigenesis in vitro and in vivo.MLX-interacting protein(MLXIP)and Kinectin 1(KTN1)were identified as PRMT1-binding proteins.PRMT1 recruited MLXIP to the promoter ofβ-catenin,which inducedβ-catenin transcription and activated theβ-catenin signaling pathway,promoting GC cell migration and metastasis.Furthermore,KTN1 inhibited the K48-linked ubiquitination of PRMT1 by decreasing the interaction between TRIM48 and PRMT1.Collectively,our findings reveal a mechanism by which PRMT1 promotes cell proliferation and metastasis mediated by theβ-catenin signaling pathway. | Feng Wang Shitong Chen Shihan Peng Xujun Zhou Houyi Tang Hanghua Liang Xi Zhong He Yang Xiaoxue Ke MuHan Lü Hongjuan Cui | 2023 | Genes & Diseases2023，10，6： | 0 |
| 3 | In-situ synthesis,microstructure,and properties of NbB_(2)-NbC-Al_(2)O_(3)composite coatings by plasma spraying显示文摘The high melting point and strong chemical bonding of NbB_(2)pose a great challenge to the preparation of high-density nanostructured NbB_(2)composite coating.Herein,we report a novel,simple,and efficient method to fabricate in-situ NbB_(2)–NbC–Al_(2)O_(3)composite coating by plasma spraying Nb_(2)O_(5)–B_(4)C–Al composite powder,aiming at realizing the higher densification and ultra-fine microstructure of NbB_(2)composite coating.The microstructure and properties of in-situ NbB_(2)–NbC–Al_(2)O_(3)composite coating were studied comparatively with ex-situ NbB_(2)–NbC–Al_(2)O_(3)composite coating(plasma spraying NbB_(2)–NbC–Al_(2)O_(3)composite powder).The reaction mechanism of Nb_(2)O_(5)–B_(4)C–Al composite powder in plasma jet was analyzed in detail.The results showed that the in-situ nanostructured NbB_(2)–NbC–Al_(2)O_(3)composite coating presented a lower porosity and superior performance including higher microhardness,toughness and wear resistance compared to the plasma sprayed ex-situ NbB_(2)–NbC–Al_(2)O_(3)coating and other boride composite coatings.Densification of the in-situ NbB_(2)–NbC–Al_(2)O_(3)coating was attributed to the low melting point of Nb_(2)O_(5)–B_(4)C–Al composite powder and the exothermic effect of in-situ reaction.The superior performance was ascribed to the density improvement and the strengthening and toughening effect of the nanosized phases.The in-situ reaction path could be expressed as:Nb_(2)O_(5)+Al®Nb+Al_(2)O_(3),and Nb+B_(4)C®NbB_(2)+NbC. | Xiaolong WANG Yong YANG Shitong JIA Yanwei WANG Yuduo MA Yuhang CUI Xingyu WANG Wenwei SUN Liang WANG | 2022 | Journal of Advanced Ceramics2022，11，8： | 0 |
| 4 | Diffusion process in enzyme-metal hybrid catalysts显示文摘Enzyme-metal hybrid catalysts bridge the gap between enzymatic and heterogeneous catalysis,which is significant for expanding biocatalysis to a broader scope.Previous studies have demonstrated that the enzyme-metal hybrid catalysts exhibited considerably higher catalytic efficiency in cascade reactions,compared with that of the combination of separated enzyme and metal catalysts.However,the precise mechanism of this phenomenon remains unclear.Here,we investigated the diffusion process in enzyme-metal hybrid catalysts using Pd/lipase-Pluronic conjugates and the combination of immobilized lipase(Novozyme 435)and Pd/C as models.With reference to experimental data in previous studies,the Weisz-Prater parameter and efficiency factor of internal diffusion were calculated to evaluate the internal diffusion limitations in these catalysts.Thereafter,a kinetic model was developed and fitted to describe the proximity effect in hybrid catalysts.Results indicated that the enhanced catalytic efficiency of hybrid catalysts may arise from the decreased internal diffusion limitation,size effect of Pd clusters and proximity of the enzyme and metal active sites,which provides a theoretical foundation for the rational design of enzyme-metal hybrid catalysts. | Shitong Cui Jun Ge | 2022 | Frontiers of Chemical Science and Engineering2022，16，6： | 0 |
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