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Engineering atomic Rb-N configurations to tune radical pathways for highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

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Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye Li Shuang Pan Yihuang Chen Qiong liu College of Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

青钱柳总皂苷对游离脂肪酸诱导的H4-ⅡE细胞脂肪代谢的影响及作用机制

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中国实验方剂学杂志 2017年第15期23卷 124-129页

作者：许光远孙文郭璇吴丽丽秦灵灵宋紫临田硕刘铜华北京中医药大学北京100078 北京中医药大学中医养生学研究所北京100029 陕西中医药大学第一临床医学院陕西咸阳712046 北京中医药大学研究生院北京100078

目的:研究青钱柳总皂苷(CPS)对游离脂肪酸(FFA)诱导的H4-ⅡE肝细胞脂肪代谢的影响和作用机制。方法:以FFA诱导的H4-ⅡE大鼠肝细胞为模型,培养72 h后,采用Neutral red法检测CPS(0,0.05,0.10,0.20,0.40 g·L^(-1))对细胞活性的影响;根据... 详细信息

目的:研究青钱柳总皂苷(CPS)对游离脂肪酸(FFA)诱导的H4-ⅡE肝细胞脂肪代谢的影响和作用机制。方法:以FFA诱导的H4-ⅡE大鼠肝细胞为模型,培养72 h后,采用Neutral red法检测CPS(0,0.05,0.10,0.20,0.40 g·L^(-1))对细胞活性的影响;根据细胞活性检测结果选择CPS低剂量组(CPS-L,0.10 g·L^(-1))和高剂量组(CPS-H,0.20 g·L^(-1))干预,油红O(Oile red)染色并测定细胞内脂质含量;药物干预2 h后实时荧光定量PCR(Real-time PCR)检测肝细胞相应基因表达,药物干预30 min后,利用蛋白免疫印迹法(Western blot)检测细胞相应蛋白磷酸化水平。结果:与正常组比较,0.10,0.20 g·L^(-1)CPS干预后肝细胞活性明显升高(P<0.05);干预72 h后,Oile red染色显示FFA(20μmol·L^(-1))诱导后呈现大片红染的脂滴,细胞脂质含量显著增加(P<0.01),CPS干预后细胞中红染的脂滴减少,细胞脂质含量较FFA(20μmol·L^(-1))诱导组明显减少(P<0.05,P<0.01);与模型组比较,CPS-L和CPS-H组腺苷酸活化蛋白激酶(AMPK),乙酰Co A羧化酶(ACC)蛋白磷酸化水平明显升高(P<0.05,P<0.01);胆固醇应答元件结合蛋白1c(SREBP1c),脂肪酸合成酶(FAS)mRNA表达水平明显降低(P<0.05,P<0.01)。结论:CPS能够显著降低体外FFA诱导肝细胞脂质沉积,可能是通过上调AMPK,ACC蛋白磷酸化水平,下调SREBP1c,FAS mRNA表达而发挥作用。

关键词：青钱柳总皂苷脂质沉积活化蛋白激酶/乙酰CoA羧化酶胆固醇应答元件结合蛋白1c/脂肪酸合成酶

Sequential interactive image segmentation

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Computational Visual Media 2023年第4期9卷 753-765页

作者： Zheng lin Zhao Zhang zi-Yue Zhu Deng-Ping Fan Xia-Lei liu TKLNDST College of Computer ScienceNankai UniversityTianjinChina Computer Vision Lab ETH ZurichZurichSwitzerland

Interactive image segmentation(IIS)is an important technique for obtaining pixel-level *** many cases,target objects share similar ***,IIS methods neglect this connection and in particular the cues provided by representations of previously segmented objects,previous user interaction,and previous prediction masks,which can all provide suitable priors for the current *** this paper,we formulate a sequential interactive image segmentation(SIIS)task for minimizing user interaction when segmenting sequences of related images,and we provide a practical approach to this task using two pertinent *** first is a novel interaction *** annotating a new sample,our method can automatically propose an initial click proposal based on previous *** dramatically helps to reduce the interaction burden on the *** second is an online optimization strategy,with the goal of providing semantic information when annotating specific targets,optimizing the model with dense supervision from previously labeled *** demonstrate the effectiveness of regarding SIIS as a particular task,and our methods for addressing it.

关键词： interactive segmentation user interaction object segmentation

Gene Expression Patterns in Different Wool Densities of Rex Rabbit Using cDNA Microarray

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Agricultural Sciences in China 2011年第4期10卷 595-601页

作者： CHEN Sai-juan liu Tao liu Ya-juan DONG Bing GU zi-lin College of Animal Science and Technology Agricultural University ofHebei Baoding 071001 P.R. China Ringpu （Baoding） Biological Pharmaceutical Co. Ltd. Baoding 071000 P.R. China Mountain Area Research Institute Agricultural University of Hebei Baoding 071001 P.R.China Division of Scientific Research Agricultural University of Hebei Baoding 071001 P.R.China

This study was carried out to identify gene expression patterns in different wool densities of rex rabbit. The mid-dorsal skin samples from 8 rex rabbits were studied. They were divided into two groups according to different wool densities. Total RNA was isolated and labeled by reverse transcription reaction with Cy5-dCTP and Cy3-dCTP for cDNA probe. The cDNA probe was hybridized with cDNA microarrays containing 14 601 rabbit’s genes. The differently expressed genes were analysed with the Gene Ontology （GO） classification and the pathway analysis. Hierarchical clustering was performed to clarify genes in association with different wool densities. The 2 657 differentially expressed genes were identified. Among them, 1 103 genes were functionally known genes, 687 genes were up-regulated and 419 were down-regulated. GO analysis indicated that these altered genes were associated with metabolism, signal transduction, cell cycle, cell adhesion, cell proliferation, cell division, apoptosis, and other processes. KEGG analysis showed that 95 signal pathways associated with up-regulated genes and 87 signal pathways associated with down-regulated genes had changed significantly （P0.05）. Some important differentially expressed genes in different wool densities of rex rabbit were identified, such as MMP2, TGF-β1, TGF-β2, IGF-1, ITGB1, RPS6KB1, BMP2, ActRIIB, CDK2, and CCNA2. Hierarchical clustering analysis separated the differentially expressed genes into 5 main characteristic groups. Data from cDNA microarray experiments clearly distinguished between group A and group B. Some important genes were identified, which might be useful in further study on wool density markers of rex rabbit.

关键词： rex rabbit wool density gene expression cDNA microarray GO and KEGG analysis

Lipomatous ependymoma with ZFTA:RELA fusion-positive:A case report

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World Journal of Clinical Cases 2025年第1期13卷 48-55页

作者： Xiao-Yu Zhao Juan-Han Yu Yi-Hua Wang Yi-Xin liu Lu Xu lin Fu Ning Yi China Medical University The First Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Department of Pathology The First Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina Anshan Cancer Hospital Anshan 114000Liaoning ProvinceChina

BACKGROUND Ependymoma with lipomatous differentiation is a rare type of *** ZFTA fusion-positive supratentorial ependymoma is a novel tumor type in the 2021 World Health Organization classification of central nervous system *** fusion-positive lipomatous ependymoma has not been reported to *** SUMMARY We reported a case of a 15-year-old Chinese male who had a sudden convulsion lasting approximately six *** resonance imaging showed a round cystic shadow of approximately 1.9 cm×1.5 cm×1.9 cm under the right parieto-occipital *** examination showed characteristic perivascular pseudorosettes and adipose differentiation in the ***-chemical staining showed that the tumor cells were negative for cytokeratin,NeuN,Syn and p53,but positive for GFAP,vimentin and S-100 ***-ficant punctate intracytoplasmic EMA immunoreactivity was *** level of Ki-67 was about 5%.Genetic analysis revealed ZFTA:RELA fusion.A cranio-tomy with total excision of the tumor was *** follow-up time was 36 months,no evidence of disease recurrence was found in magnetic resonance *** Based on these findings,the patient was diagnosed as a ependymoma with ZFTA fusion and lipomatous *** case report provides information on the microscopic morphological features of ependymoma with ZFTA fusion and lipomatous differentiation,which can help pathologists to make a definitive diagnosis of this tumor.

关键词： Ependymoma Lipomatous Molecular classification Supratentorial ZFTA:RELA fusion Case report

Micro segment analysis of supercritical methane thermal-hydraulic performance and pseudo-boiling in a PCHE straight channel

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Petroleum Science 2024年第2期21卷 1275-1289页

作者： Qian Li zi-Jie lin liu Yang Yue Wang Yue Li Wei-Hua Cai Laboratory of Thermo-Fluid Science and Nuclear Engineering Northeast Electric Power UniversityJilin132000JilinChina School of Energy and Power Engineering Northeast Electric Power UniversityJilin132000JilinChina

The printed circuit heat exchanger(PCHE) is receiving wide attention as a new kind of compact heat exchanger and is considered as a promising vaporizer in the LNG process. In this paper, a PCHE straight channel in the length of 500 mm is established, with a semicircular cross section in a diameter of 1.2 *** simulation is employed to investigate the flow and heat transfer performance of supercritical methane in the channel. The pseudo-boiling theory is adopted and the liquid-like, two-phase-like, and vapor-like regimes are divided for supercritical methane to analyze the heat transfer and flow *** results are presented in micro segment to show the local convective heat transfer coefficient and pressure drop. It shows that the convective heat transfer coefficient in segments along the channel has a significant peak feature near the pseudo-critical point and a heat transfer deterioration when the average fluid temperature in the segment is higher than the pseudo-critical point. The reason is explained with the generation of vapor-like film near the channel wall that the peak feature related to a nucleateboiling-like state and heat transfer deterioration related to a film-boiling-like state. The effects of parameters, including mass flow rate, pressure, and wall heat flux on flow and heat transfer were *** calculating of the averaged heat transfer coefficient of the whole channel, the traditional method shows significant deviation and the micro segment weighted average method is adopted. The pressure drop can mainly be affected by the mass flux and pressure and little affected by the wall heat flux. The peak of the convective heat transfer coefficient can only form at high mass flux, low wall heat flux, and near critical pressure, in which condition the nucleate-boiling-like state is easier to appear. Moreover,heat transfer deterioration will always appear, since the supercritical flow will finally develop into a filmboiling-like state. So hea

关键词： Printed circuit heat exchanger Vaporization Supercritical methane Pseudo-boiling Micro segment analysis

Microstructure and mechanical properties of a cast heat-resistant rare-earth magnesium alloy

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China Foundry 2023年第4期20卷 289-298页

作者： Xiao-ping Zhu Jun-qing Yao Hai-long Wu Xin-wang liu Hua liu zi-tian Fan Shu-lin Lü Kai Wang zi-dong Wang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Dekai Intelligent Casting Co. Ltd.Zhuozhou 072750HebeiChina China Iron and Steel Research Institute Group Beijing 100081China Guangdong Hongtu Wuhan Die-casting Co. Ltd.Wuhan 430207China

Microstructure,mechanical properties and phase transformation of a heat-resistant rare-earth(RE)Mg-16.1Gd-3.5Nd-0.38Zn-0.26Zr-0.15Y(wt.%)alloy were *** as-cast alloy is composed of equiaxedα-Mg matrix,net-shaped Mg5RE and Zr-rich *** to aging hardening curves and tensile properties variation,the optimized condition of solution treatment at 520℃for 8 h and subsequent aging at 204℃for 12 h was *** continuous secondary Mg5RE phase predominantly formed at grain boundaries during solidification transforms to residual discontinuousβ-Mg5RE phase and fine cuboid REH2particles after heat *** annealed alloy exhibits good comprehensive tensile property at 350℃,with ultimate tensile strength of 153 MPa and elongation to fracture of 6.9%.Segregation of RE elements and eventually RE-rich precipitation at grain boundaries are responsible for the high strength at elevated temperature.

关键词： heat-resistant magnesium alloy rare earth microstructure phase transformation tensile property strengthening

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning Chang liu Yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

Effect of substrate preset temperature on crystal growth and microstructure formation in laser powder deposition of single-crystal superalloy

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Journal of Materials Science & Technology 2018年第11期34卷 2116-2124页

作者： Zhaoyang liu zi Wang College of Innovation and Entrepreneurship Southern University of Science and Technology Shenzhen Key Laboratory for Additive Manufacturing of High Performance Materials Southern University of Science and Technology State Key Laboratory of Powder Metallurgy Central South University

A successful repair of single-crystal components needs to avoid the stray grain formation and achieves continuous epitaxial growth of columnar dendrites in the repaired zone. In this study, the effect of substrate preset temperature on crystal growth and microstructure formation in laser powder deposition of single-crystal superalloy was studied through an improved mathematical model and corresponding experimental approaches. The results indicated that the variation of substrate preset temperature between-30℃ and ＋210℃ changes the molten pool morphology little, but obviously affects the columnar-to-equiaxed transition conditions. The preheating of substrate facilitates the stray grain formation and enlarges the primary columnar dendrite arm spacing, while the situation for precooling of substrate is opposite. Under the specific processing conditions, the critical condition for continuous epitaxial growth is that the substrate preset temperature Tsub≤ ＋90℃. When the substrate preset temperature Tsubis below ＋90℃, the height ratio of melting depth to total height of the molten pool is larger than that of stray grain, ensuring that stray grains can be completely remelted and the continuous columnar dendrites during the multi-layer laser powder deposition process on（001） surface of single-crystal substrate can be achieved.

关键词： Single-crystal superalloy Crystal growth Laser powder deposition