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Phosphorus source-sink distributions and fluxes in shallow-water wetland sediments:Insights from multiple habitats,varying water quality,and microbial communities 认领 引用
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作者 Yuwei Zhang Shengqi Zhang +3 位作者 Yangyang Han Cheng Guo Ling Liu Hongjie Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第6期752-767,共16页
Fluctuation in overlying water quality across multiple habitats and the reservoir conditions of different sediment pollutants significantly influence the“source-sink”effect of endogenous nutrients in shallow-water w... Fluctuation in overlying water quality across multiple habitats and the reservoir conditions of different sediment pollutants significantly influence the“source-sink”effect of endogenous nutrients in shallow-water wetlands.This study investigated the sediment nutrient composition in four habitats(i.e.open-water area,ditch,pond,and reed marsh)within Baiyangdian wetland(BYDW),combined with the simulated release experiment to estimate the nutrient exchange flux under the different overlying water qualities.The findings indicate that the nutrient contents of ditch sediments were significantly higher than those in the other habitats.The ditch overlying water exhibited significantly higher concentrations of soluble reactive phosphorus(SRP),total phosphorus(TP),and ammonia nitrogen(NH4+-N),and the maximum contents were 0.009 mg/L,0.0443 mg/L,and 0.4057 mg/L,respectively.Sediment horizon depth significantly influenced the composition of different P fractions.While residual phosphorus(Res-P)and calcium-bound phosphorus(Ca-P)comprised a substantial portion of TP,about 60.53%-79.46%.Sediments in ditch,pond,and reed marsh areas acted as TP sources under the raw water quality condition,and the releasing rate was 4.68,1.80,and 0.18 mg/(m2・day).The overlying water quality,sediment pH,organic matter(OM)content,as well as phosphorus speciation significantly influenced the exchange of phosphorus-containing substances.Both Chloroflexi and Proteobacteria significantly contributed to the degradation of sediment nutrients in open-water and reed areas.Ditch exhibited the highest TP release,with the release amount W(TP)varied from 64.15–72.17 t/yr.The ditch and pond areas exhibited relatively strong“source”potential,highlighting the need for effective management of endogenous pollution. 展开更多
关键词 Multiple habitats Nutrients distribution Source-sink Environmental factors
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Evaluating refractive index and birefringence of nonlinear optical crystals:Classical methods and new developments 认领 引用 被引量：11
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作者 Qi Shi Lingyun Dong Ying Wang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2023年第1期46-63,共18页
Nonlinear optical(NLO)materials play an increasingly important role in laser technology.Birefringence is one of the most important parameters for NLO materials to realize angle phase-matching conditions.In comparison ... Nonlinear optical(NLO)materials play an increasingly important role in laser technology.Birefringence is one of the most important parameters for NLO materials to realize angle phase-matching conditions.In comparison with other desirable optical properties,the availability of birefringence and refractive index dispersion is especially problematic owing to the strict requirements for single crystals.In this review,we described how to obtain the refractive index and birefringence of NLO materials from crystals sub-millimeters to centimeters in size.Espe-cially,recently developed methods including the minimum deflection angle method,auto-collimation method,prism coupling method,oil immersion technique,interference color method,and theoretical calculation(DFT)for rapid assessment of birefringence are summarized,the contents of which are mainly focused on the principles and typical applications,together with the advantages and drawbacks.In addition,representative examples of bire-fringent measurements were presented.The purpose of this work is to provide a useful perspective on the characterization of birefringence for NLO materials.It is hoped that this review can give a clear description of the birefringence measurements and accelerate the discovery of new NLO crystals. 展开更多
关键词 Nonlinear optical crystals Refractive index Birefringence DFT calculation Phase-matching
Visible-Light-Induced Phosphorylation Cyclization to Phosphorylated Indole-Fused Diazepines 认领 引用
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作者 Hou Xinyi Shi Tongtong +3 位作者 Li Zejiang Dong Qinghao Sun Kai Wang Xin 《有机化学》 SCIE CAS CSCD 北大核心 2026年第4期1776-1787,共12页
novel visible-light induced phosphorylation cyclization to indole-fused medium-sized diazepines was established under room temperature.Broad substrate scope,good functional group compatibility,large-scale synthesis an... novel visible-light induced phosphorylation cyclization to indole-fused medium-sized diazepines was established under room temperature.Broad substrate scope,good functional group compatibility,large-scale synthesis and derivatization via nitration,chlorination and cyanation demonstrate the utility of this protocol.P-centered radical involed energy transfer(EnT)process was proposed based on radical inhibition experiments,visible-light irradiation on-off test,apparent quantum efficiency(AQE)calculation,UV-vis absorption spectroscopic studies and cyclic voltammetry experiments. 展开更多
关键词 photocatalysis radical cyclization phosphorylation medium-sized N-heterocycles
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Dual-Mode Self-Calibrated Strategy Based on Synergistic Amplification Effects of in Situ Rolling Circle Amplification and Hydrophobic inner Wall of the Nanopores for Highly Sensitive Detection of microRNA 认领 引用
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作者 Yilin Zhang Jiangxue Dong +7 位作者 Yufan Zhang Saimei Zhang Yajie Fan Yanlei Li Qun Ma Hongyuan Yan Shigang Shen Zhongfeng Gao 《Journal of Analysis and Testing》 EI CSCD 2026年第1期284-294,共11页
MicroRNA(miRNA),a crucial regulatory factor for maintaining homeostasis,is closely linked to the pathogenesis of numerous diseases.However,traditional miRNA detection technologies exhibit limitations,including low sel... MicroRNA(miRNA),a crucial regulatory factor for maintaining homeostasis,is closely linked to the pathogenesis of numerous diseases.However,traditional miRNA detection technologies exhibit limitations,including low selectivity and sensitivity.In this study,a dual-mode self-calibrated nanopore sensing system based on rolling circle amplification(RCA)and hydrophobic modification is proposed for the highly sensitive detection of miRNA-21.Binding of miRNA-21 activates the DNAzyme catalytic activity,which triggers the stepwise release of a fluorescent group.Concurrently,residual sequences on the nanopore surface catalyze the RCA reaction,increasing the density of negative charges and amplifying the current signal,with enhancements reaching up to 384%.Fitting the ratio of electrical and fluorescence signals to the Hill equation enables self-calibrated detection of miRNA-21,thereby effectively eliminating systematic errors.This system achieves a linear detection range for miRNA-21 from 1 pM to 100 nM in fluorescence assays and from 1 fM to 1 nM in electrochemical assays,with detection limits of 0.16 pM and 0.28 fM,respectively.Furthermore,this innovative approach enables sensitive detection of clinical serum samples with elevated miRNA-21 expression levels.The system holds potential applications in the field of biomedicine,particularly in advancing disease diagnosis. 展开更多
关键词 Nanopore Biosensor Rolling circle amplification Self-calibration Electrochemistry
Organophosphate ester contamination in long-term plasticulture soils:Co-occurrence of tri/di-OPEs,influence factors,source Attribution,and environmental risks 认领 引用
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作者 Yangyang Liu Yuting Ren +8 位作者 Huijie Dang Mengfei Liu Ke Hu Ang Zhao Wei Liu Yuxia Yang Chao Wei Jianzhong Xu Mei Wang 《Emerging Contaminants》 CSCD 2025年第2期336-344,共9页
This study focused on the pollution characteristics, influencing factors, and source apportionment of organophosphate triesters (tri-OPEs) and diesters (di-OPEs) in the plastic greenhouses soils with cultivation perio... This study focused on the pollution characteristics, influencing factors, and source apportionment of organophosphate triesters (tri-OPEs) and diesters (di-OPEs) in the plastic greenhouses soils with cultivation periods ranging from 6 to 32 years. The concentrations of Σ13tri-OPEs and Σ5di-OPEs in soil samples ranged from 39.60 to 730.52 ng/g dw and 2.25–6.94 ng/g dw, respectively. Tris (chloroethyl) phosphate was the predominant tri-OPE, while dibutyl phosphate was the most abundant di-OPE. The levels of OPEs pollution increased with the age of mulch film, highlighting the impact of the duration of mulch film usage on OPE accumulation. The type of fertilizer significantly impacted OPE levels. Soil samples treated with compound fertilizers showed the highest concentration of tri-OPEs, reaching up to 205.32 ng/g dry weight. In contrast, the highest concentration of di-OPEs was found in soil samples treated with water-soluble fertilizers, with a peak of 3.89 ng/g dry weight. Total organic carbon, pH, total nitrogen, and total phosphorus had minimal effect on OPEs levels. According to the Positive Matrix Factorization Model, the primary sources of OPEs included the use of pesticides, food packaging materials, and small-scale machinery (48.39 %), water and reclaimed water irrigation (17.68 %), the utilization of agricultural films (17.39 %), and atmospheric deposition and degradation processes (16.54 %). Compared to the moderate risks associated with compounds such as tri-2-ethyl phosphate, 2-ethylhexyl diphenyl phosphate, and tris(1-chloro-2-propyl) phosphate, tris(chloroethyl) phosphate exhibited a higher risk level in soil samples. This study offers insights into the potential risks linked to OPE contamination in agricultural soils. 展开更多
关键词 Tri-OPEs Di-OPEs Plastic greenhouse soil Source apportionment
Crystallization-controlled microstructure of titanium species in TS-1 zeolite for tailored catalytic performance 认领 引用 被引量：1
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作者 Siqi Chen Jingxuan Wang +1 位作者 Tianjun Zhang Risheng Bai 《Inorganic Chemistry Frontiers》 SCIE EI CAS CSCD 2025年第11期3864-3872,共9页
TS-1 zeolite,celebrated for its superior catalytic performance in selective oxidation reactions,presents a significant challenge in optimizing the microstructure of its titanium active sites to maximize the efficiency... TS-1 zeolite,celebrated for its superior catalytic performance in selective oxidation reactions,presents a significant challenge in optimizing the microstructure of its titanium active sites to maximize the efficiency for specific applications.In this study,we successfully manipulated the microstructure of titanium species within TS-1 by kinetically controlling the crystallization process,thereby achieving the formation of poly-hexacoordinated Ti species in the initial amorphous titanosilicate phase and the construction of framework TiO4 species in fully crystallized TS-1 zeolite.Notably,the amorphous titanosilicate catalyst exhibited high efficiency in the oxidative desulfurization of dibenzothiophene,while showing negligible activity in 1-hexene epoxidation.Conversely,the crystalline TS-1 catalyst demonstrated outstanding performance in alkene epoxidation but limited efficacy in oxidative desulfurization.This study outlines a controlled crystallization process that allows precise tuning of zeolite active sites,thereby enhancing their catalytic effectiveness for targeted applications. 展开更多
关键词 catalytic performance optimizing microstructure manipulated microstructure TS zeolite selective oxidation reactionspresents titanium species crystallization controlled microstructure amorphous titanosilicate
Boron-Stereogenic Compounds:Synthetic Developments and Opportunities 认领 引用 被引量：4
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作者 Yonghong Guo Bing Zu +1 位作者 Cadmus Du Chen Chuan He 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第19期2401-2411,共11页
Comprehensive Summary The 21st century has witnessed a continuous evolution in the development of boron-stereogenic chemistry.Since the 1990s,various innovations for the synthesis of tetracoordinate boron-stereogenic ... Comprehensive Summary The 21st century has witnessed a continuous evolution in the development of boron-stereogenic chemistry.Since the 1990s,various innovations for the synthesis of tetracoordinate boron-stereogenic compounds,which exhibited great potential applications,have been demonstrated by synthetic chemists.This paper reviews the significant progress and recent advances towards the assembly of enantioenriched boron-stereogenic compounds,and hopes to shed light on new perspectives and inspire further research in this emerging field. 展开更多
关键词 Chiral organoboron Boron-stereogenic compounds Chiral resolution Asymmetric synthesis Asymmetric catalysis Chirality Heterocycles Chelates
Colossal permittivity with ultra-wide temperature stability in Bi +Ca co-doped BaTiO3 认领 引用 被引量：2
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作者 Tingting Fan Qi Shi +6 位作者 Wenrong Xiao Guangzu Zhang Feng Huang Wenlin Wang Wen Dong Shenglin Jiang Jing Wang 《Journal of Materiomics》 SCIE CSCD 2025年第2期83-91,共9页
The poor temperature stability of the BaTiO3 ceramic has always been the main problem limiting their application.This situation has been improved but sacrifices the intrinsic polarization,which significantly reduce... The poor temperature stability of the BaTiO3 ceramic has always been the main problem limiting their application.This situation has been improved but sacrifices the intrinsic polarization,which significantly reduces the dielectric constant.In this work,the mechanism of multiple polarization was creatively introduced,and the temperature stability and dielectric properties of BaTiO3-based ceramics are simultaneously enhanced.In particular,the Ba0.9925Bi0.005Ti0.995Ca0.005O2.995(BBTC0.5)ceramic sample achieved excellent temperature stability(-14.8%to 8.85%)over an ultra-wide temperature range(-47 to 400℃)and exhibited colossal permittivity(27,125,25℃,1 kHz)and low dielectric loss(0.07,25℃,1 kHz).The dielectric properties,complex impedance spectra combined with XPS results indicate that the defective dipole clusters(Ti3+-VO-Ti3+,BiBa and Ca″Ti-VO)along with surface effects lead to colossal permittivity effect.More importantly,SEM images show the presence of the second phase at grain boundaries,which prevent the carriers within the grains from accumulating at the grain boundaries.As a result,the dielectric loss was reduced and the temperature stability was further extended.This strategy breaks the traditional limitation of singleoncomprehensive enhancement by singlepolarization mechanism,and is of great theoretical and practical significance to promote the research and application of high-performance BaTiO3-based ceramic materials. 展开更多
关键词 Temperature stability Colossal permittivity BaTiO3 Bi Ca co-doped Defect dipole clusters
Na6Sn3P4S16:Sn(Ⅱ)-chelated PS4 groups inspired an ultra-strong SHG response 认领 引用 被引量：3
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作者 Chenyao Zhao Bingbing Zhang +3 位作者 Xinyu Tian Guoqiang Zhou Jingjing Xu Kui Wu 《Inorganic Chemistry Frontiers》 SCIE EI 2023年第19期5726-5733,共8页
The discovery of new infrared nonlinear optical(IR NLO)materials with a large second harmonic generation(SHG)effect and broad optical bandgap is still a challenging task.Based on this,we propose a rational strategy fo... The discovery of new infrared nonlinear optical(IR NLO)materials with a large second harmonic generation(SHG)effect and broad optical bandgap is still a challenging task.Based on this,we propose a rational strategy for the design of new NLO materials:(i)the coupling of stereochemically active lone-pair(SCALP)Sn(Ⅱ)cations and typical PS4units into a structure enhances the SHG response. 展开更多
关键词 ps units infrared nonlinear second harmonic generation broad optical bandgap ultra strong shg response scalp sn cations infrared nonlinear optical materials structural design
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