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A novel metal-free porous covalent organic polymer for efficient room-temperature photocatalytic CO2.reduction via dry-reforming of methane

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Green Energy & Environment 2024年第9期9卷 1407-1418页

作者： Sheng-Yan yin Ziyi Li yingcai Hu Xiao Luo Jishan Li College of Chemistry and Chemical Engineering Hunan University Institute of Basic Medicine and Cancer (IBMC) Chinese Academy of Sciences

At room temperature,the conversion of greenhouse gases into valuable chemicals using metal-free catalysts for dry reforming of methane（DRM） is quite promising and ***,we developed a novel covalent organic porous polymer （TPE-COP） with rapid charge separation of the electron–hole pairs for DRM driven by visible light at room temperature,which can efficiently generate syngas （CO and H2..Both electron donor (tris（4-aminophenyl）amine,TAPA) and acceptor (4,4',4'',4'''-(（1.E,1.E,1.'E,1.''E）-(ethene-1.1.2.2.tetrayltetrakis （benzene-4,1.diyl）)tetrakis （ethene-2.1.diyl）)tetrakis (1.（4-formylbenzyl）quinolin-1.ium),TPE-CHO) were existed in TPE-COP,in which the push–pull effect between them promoted the separation of photogenerated electron–hole,thus greatly improving the photocatalytic *** functional theory （DFT） simulation results show that TPE-COP can form charge-separating species under light irradiation,leading to electrons accumulation in TPE-CHO unit and holes in TAPA,and thus efficiently initiating *** 2. h illumination,the photocatalytic results show that the yields reach 1.2..6 and 30.8μmol g-1.or CO and H2.respectively,which are significantly higher than those of TPE-CHO small *** excellent result is mainly due to the increase of specific surface area,the enhancement of light absorption capacity,and the improvement of photoelectron-generating efficiency after the formation of ***,this work contributes to understanding the advantages of COP materials for photocatalysis and fundamentally pushes metal-free catalysts into the door of DRM field.

关键词： Metal-free Photocatalytic CO 2 reduction Covalent organic polymer Dry-reforming of methane Electron donor and acceptor

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Immunoassay utilizing biochemistry reaction product via surface-enhanced Raman scattering in near field

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中国科学：化学英文版 2005年第3期48卷 240-245页

作者： ZHAO Haiying1. NI Yi1. JIANG Wei1. LUO Peiqing1. HUANG Meizheng1. yin Guangzhong2.& DOU Xiaoming1.1. Institute of Optics Engineering, Shanghai Jiaotong University, Shanghai 2.0030, China 2. Suzhou No. 2.People’s Hospital, Suzhou 2.1}000, China Institute of Optics Engineering Shanghai Jiaotong University Shanghai China Suzhou No. 2.People’s Hospital Suzhou China

We propose here a kind of applications of surface-enhanced Raman scattering (SERS) to immunology. It is a new enzyme immunoassay based on SERS. In the proposed system, antibody immobilized on a solid substrate reacts with antigen, which binds with another antibody labeled with peroxidase. If this immunocomplex is subjected to reaction with o-phenylenediamine and hydrogenperoxide, azoaniline is generated. This azo compound is ad-sorbed on a silver colloid and only the azo compound gives a strong surface-enhanced reso-nance Raman (SERRS) spectrum. A linear relationship was observed between the peak intensity of the N=N stretching band and the concentration of antigen, revealing that one can determine the concentration of antigen by the SERRS measurement of the reaction product. The detection limit of this SERS enzyme immunoassay method was found to be about 1.?1. mol/L.

关键词： surface-enhanced Raman scattering, SERS, near field, immunoassay, metal colloid.

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Effect of Substrate-Water Interaction on the Wetting Behavior in Water-Oil and Substrate-Water-Oil Systems

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Wuhan University Journal of Natural Sciences 2003年第4A期8卷 1097-1102页

作者： Yuan yin-quan 1.2., Zou Xian-wu 1. , Jin Zhun-zhi 1.1. School of Physics and Technology, Wuhan University, Wuhan 430072. Hubei, China 2. Department of Physics, Xiaogan University, Xiaogan 432.1}0, Hubei, China School of Physics and Technology Wuhan University Wuhan Hubei China Department of Physics Xiaogan University Xiaogan Hubei China

The effects of the substrate-water interaction on the wetting behavior in water-oil and surfactant-water-oil systems confined by one substrate which has the preferential interaction to one species of particles have been investigated by using the free energy analysis and discontinuous molecular dynamic simulations. As the preferential interaction between the substrate and water particles varies from small repulsion to large attraction, the partial drying, partial wetting and complete wetting state are observed in sequence. In addition, the wetting behavior of surfactant aqueous solution on the substrate is not only dependent on the interaction, but also limited by the maximum equilibrium concentration of surfactants at the interface.

关键词： wetting behavior wetting transition preferential interaction substrate

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Biochemical consequences of glucocerebrosidase 1.mutations in Parkinson’s disease

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Neural Regeneration Research 2024年第4期19卷 725-727页

作者： Jeong Hyun Yoon Chiao-yin Lee Anthony HV Schapira Department of Clinical and Movement Neurosciences University College London Institute of Neurology Faculty of Medicine Imperial College London Aligning Science Across Parkinson's(ASAP)Collaborative Research Network

Parkinson’s disease(PD,OMIM#1.8600)is a common neurodegenerative disorder with a global prevalence of approximately 8.5 *** is characterized by four cardinal motor symptoms:bradykinesia,rigidity,resting tremor,and subsequently by postural *** usually involves non-motor symptoms such as rapid eye movement sleep disorder,dementia,anosmia,and autonomic *** gene glucocerebrosidase 1.GBA1.,which encodes the lysosomal enzyme glucocerebrosidase(GCase)(IUBMB:EC 3.***.1.45),shows strong linkage with PD;variants of GBA1.are the commonest genetic association with PD(Sidransky et al.,2.09).Several mechanisms may underlie the relationship between GBA1.mutations/variants and the molecular pathology of PD(Figure 1. and B).

关键词： cerebro consequences

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Insight into the Role and Evidence of Oxygen Vacancies in Porous Single-Crystalline Oxide to Enhance Catalytic Activity and Durability

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Research 2024年第2期2023卷 675-683页

作者： Lingting Ye Jiaming Ma Jie Zhang Wen yin Yuanguang Xia Kui Xie Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujan Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China FuzhouFujian 350108China Advanced Energy Science and Technology Guangdong Laboratory 29 Sanxin North RoadHuizhouGuangdong 116023China Spallation Neutron Source Science Center DongguanGuangdong 523803China

Introducing and stabilizing oxygen vacancies in oxide catalysts is considered to be a promising strategy for improving catalytic activity and ***,we quantitatively create oxygen vacancies in the lattice of porous single-crystallineβ-Ga_(2.O_(3)monoliths by reduction treatments and stabilize them through the long-range ordering of crystal lattice to enhance catalytic activity and *** combination analysis of time-of-flight neutron powder diffraction and extended x-ray absorption fine structure discloses that the preferential generation of oxygen vacancy tends to occur at the site of tetrahedral coordination oxygen ions(O_(Ⅲ)sites),which contributes to the formation of unsaturated Ga-O coordination in the monoclinic *** oxygen vacancies are randomly distributed in lattice even though some of them are present in the form of domain defect in the PSC Ga_(2.O_(3)monoliths after the reduction *** number of oxygen vacancies in the reduced monoliths gives 2.32.1.^(1.),2.87×1.^(1.),and 3.45×1.^(1.)mg^(-1.for the Ga_(2.O_(2.952.,Ga_(2.O_(2.895),and Ga_(2.O_(2.880),*** therefore demonstrate the exceptionally high C_(2.H_(4)selectivity of~1.0%at the C_(2.H_(6)conversion of~37%for nonoxidative dehydrogenation of C_(2.H_(6)to C_(2.H_(4).We further demonstrate the excellent durability even at 62.℃for 2.0 h of continuous operation.

关键词： durability coordination Oxygen

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Nickel-Catalyzed Stereoselective Migratory Carboboration of 1.4-Cyclohexadiene

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Chinese Journal of Chemistry 2024年第4期42卷 356-362页

作者： Yaoyu Ren Lujin Wang Chao Ding Yangyang Li Guoyin yin The Institute for Advanced Studies Wuhan UniversityWuhanHubei430072 China

Multi-substituted cyclohexanes play a crucial role as scaffolds in bioactive *** significant progress has been made in synthesizing substituted cyclohexanes,methods for the stereoselective assembly of 1.3-disubstituted cyclohexanes remain *** study presents a novel approach involving nickel catalysis to achieve stereoselective carboboration of 1.*** innovative process allows for the simultaneous introduction of a boron group and an aryl or an alkyl fragment into the 1.4-cyclohexadiene framework under mild conditions,with exclusive regioselectivity and excellent cis *** resulting products feature a double carbon bond and the incorporation of the boron group,offering significant potential for subsequent transformations and downstream applications.

关键词： 1.4-Cyclohexadiene Carboboration Nickel Chain-walking Stereoselectivity Difunctionalization

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Modulated Degradation Rates of Bone Mineral-Like Calcium Phosphate Glass to Support the Proliferation and Osteogenic Differentiation of Bone Marrow-Derived Stem Cells

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Journal of Bionic Engineering 2024年第4期21卷 1960-1974页

作者： Lizhe He Yuye Huang Jiafei Gu Xiaoling Liu Jun yin Xiang Gao Department of Neurosurgery The First Affiliated Hospital of Ningbo UniversityNingbo315010China Center for Medical and Engineering Innovation The First Affiliated Hospital of Ningbo UniversityNingbo315010China The State Key Laboratory of Fluid Power Transmission and Control Systems Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhou310028China Faculty of Science and Engineering University of Nottingham Ningbo ChinaNingbo315100China

With an elemental composition similar to bone mineral,and the ability to release phosphorus and calcium that benefit bone regeneration,Calcium Phosphate Glass(CPG)serves as a promising component of bone tissue engineering ***,the degradation of CPG composites typically results in increased acidity,and its impact on bone-forming activity is less *** this work,we prepared 3D-printed composite scaffolds comprising CPG,Poly-ε-caprolactone(PCL),and various Magnesium Oxide(MgO)*** the MgO content effectively suppressed the degradation of CPG,maintaining a physiological pH of the degradation *** the degradation of CPG/PCL scaffolds resulted in upregulated apoptosis of Rat Bone Marrow-derived Stem Cells(rBMSC),scaffolds containing MgO were free from these negative impacts,and an optimal MgO content of 1.wt%led to the most pronounced osteogenic differentiation of *** work demonstrated that the rapid degradation of CPG impaired the renewability of stem cells through the increased acidity of the surrounding media,and MgO effectively modulated the degradation rate of CPG,thus preventing the negative effects of rapid degradation and supporting the proliferation and osteogenic differentiation of the stem cells.

关键词： Phosphate glass Polymer composites 3D printing Bone tissue engineering Scaffolds

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Pressure effects on the absorption spectra of Na doped in solid Ar

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Science China(Physics,Mechanics & Astronomy) 2004年第5期47卷 550-560页

作者： CUI Tian1. HE Wenjiong1. {2. Hongwei1. MA Yanming1. CHEN Changbo1. ZOU Guangtian1. WEI Mengfu2.& CHEN Changan2.1. National Laboratory of Superhard Materials, Jilin University, Changchun 1.001., China 2. China Academy of Engineering Physics, Box 91.-71. Mianyang 62.0}00, China National Laboratory of Superhard Materials Jilin University Changchun China China Academy of Engineering Physics Mianyang China

In this work, the pressure influence on the absorption spectra of Na in solid Ar for various trapping sites is extensively investigated at T = 1. K and in the pressure range from 0 to 2.4 GPa by using Monte Carlo method with a constant pressure ensemble (NPT). For the trapping sites of nv = 1. 2. the absorption spectral widths increase progressively, the absorption peaks and the centroid spectral shift (CSS) tend to have a red shift with pressure increasing, even though there is no local structural symmetry change around Na atom caused by pressure. Highly symmetrical trapping site structure (nv = 1. determines a highly symmetrical triplet absorption feature at a low pressure. With the increase in pressure, the action from the Ar crystal field on the three energy levels of the 3p excited state of Na atom increases, resulting in the overlap of the three peaks. Low symmetrical trapping site structure (nv = 2. yields a low symmetrical triplet absorption pattern in which a large separation between the single?and the double?peaks exists at a low pressure. With the increase in pressure, the splitting between the singlet and the doublet increases, and the doublet merges as the pressure is larger than 2.4 GPa.

关键词： Monte Carlo, simulation, absorption spectra, doped system, pressure effect.

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LncRNA pol-lnc78 as a ceRNA regulates antibacterial responses via suppression of pol-miR-n1.9-3p-mediated SARM down-regulation in Paralichthys olivaceus

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Zoological Research 2024年第1期45卷 25-35页

作者： Xian-Hui Ning Bing Han Ye Peng Shao-Wu yin College of Marine Science and Engineering Nanjing Normal UniversityNanjingJiangsu 210023China CAS Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdaoShandong 266071China Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province LianyungangJiangsu 222005China

Long non-coding RNAs(lncRNAs)function as key modulators in mammalian immunity,particularly due to their involvement in lncRNA-mediated competitive endogenous RNA(ceRNA)*** their recognized significance in mammals,research on lncRNAs in lower vertebrates remains *** the present study,we characterized the first immune-related lncRNA(pol-lnc78)in the teleost Japanese flounder(Paralichthys olivaceus).Results indicated that pol-lnc78 acted as a ceRNA for pol-miR-n1.9-3p to target the sterile alpha and armadillo motif-containing protein(SARM),the fifth discovered member of the Toll/interleukin 1.IL-1.receptor(TIR)adaptor *** ceRNA network regulated the antibacterial responses of flounder via the Toll-like receptor(TLR)signaling ***,SARM acted as a negative regulator and exacerbated bacterial infection by inhibiting the expression of inflammatory cytokines IL-1.and tumor necrosis factor-α(TNF-α).Pol-miR-n1.9-3p reduced SARM expression by specifically interacting with the 3’untranslated region(UTR),thereby promoting SARM-dependent inflammatory cytokine expression and protecting the host against bacterial ***,pol-lnc78 sponged pol-miR-n1.9-3p to ameliorate the inhibition of SARM *** infection,the negative regulators pol-lnc78 and SARM were significantly down-regulated,while pol-miR-n1.9-3p was significantly up-regulated,thus favoring host antibacterial *** findings provide novel insights into the mechanisms underlying fish immunity and open new horizons to better understand ceRNA crosstalk in lower vertebrates.

关键词： LncRNA SARM miRNA ceRNA Antibacterial response

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Temporal and environmental factors drive community structure and function of methanotrophs in volcanic forest soils

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Journal of Forestry Research 2024年第2期35卷 1-13页

作者： Rusong Chai Hongjie Cao Qingyang Huang Lihong Xie Fan Yang Hongbin yin Heilongjiang Forest Botanical Garden Harbin 150040People’s Republic of China 2 Institute of Natural Resources and Ecology Science Academy of Heilongjiang ProvinceHarbin 150040People’s Republic of China

Methanotrophs,organisms that obtain oxygen by oxidizing methane,are recognized as the only known biological sink for atmospheric CH_4,and forest soil methanotrophs play crucial roles in mitigating global *** succession patterns of methanotrophic communities and functions in Wudalianchi volcano forest soils could provide a basis for the study of evolutionary mechanisms between soil microorganisms,the environment,and carbon cycling of temperate forest ecosystems under climate *** this study,the characteristics and drivers of methanotrophic community structure and function of two volcanic soils at different stages of development are analyzed,including an old volcano and a new volcano,which most recently erupted 300 years and 1.-1.×1.^(5)years ago,respectively,and a non-volcano hills as control,based on space for time substitution and Miseq sequencing and bioinformation *** results showed that CH_(4) fluxes were significantly higher in old-stage volcano forest soils than new-stage forest soils and non-volcano forest *** were significant differences in the community composition and diversity of soil methanotrophs from different volcano forest *** was the dominant genus in all soil ***,the relative abundance of Methylococcus,along with Clonothrix,Methyloglobulus,Methylomagum,Methylomonas and Methylosarcina,were the important genera responsible for the differences in methanotrophic community structure in different volcano forest *** relative abundance of methanotroph belonging toγ-proteobacteria was significantly higher than that belonging toα-proteobacteria(P1.Shannon and Simpson indices of soil methanotrophic community were significantly lower in new-stage volcanos and were significantly affected by bulk density,total porosity,p H,nitrate,dissolved organic carbon and dissolved organic *** were significant differences in community structure between new-stage and old-stage volcano

关键词： Methanotrophs pmo A Soil development stage Volcanoes Forest soils

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