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Insight into the sorption and desorption pattern of pyrrolizidine alkaloids and their N-oxides in acidic tea(Camellia sinensis)plantation soils

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Journal of Environmental Sciences 2025年第2期148卷 350-363页

作者： Yuting lu Haolei Han Yuexing Yi Yunfeng Chai ChenWang Xiangchun Zhang Xiangde Yang Hongping Chen Tea Research Institute Chinese Academy of Agricultural SciencesHangzhou 310008China Graduate School of Chinese Academy of Agricultural Sciences Beijing 100081China School of Chemical Engineering and Materials Zhejiang University of TechnologyHangzhou 310008China Key Laboratory of Tea Quality and Safety&Risk Assessment Ministry of AgricultureHangzhou 310008China Key Laboratory of Tea Quality and Safety Control Ministry of Agriculture and Rural AffairsHangzhou 310000China

Pyrrolizidine alkaloids(PAs)and their N-oxides(PANOs)are phytotoxins produced by various plant species and have been emerged as environmental *** sorption/desorption behaviors of PAs/PANOs in soil are crucial due to the horizontal transfer of these natural products from PA-producing plants to soil and subsequently absorbed by plant *** study firstly investigated the sorption/desorption behaviors of PAs/PANOs in tea plantation soils with distinct *** amounts for seneciphylline(Sp)and seneciphylline-N-oxide(SpNO)in three acidic soils ranged from 2.9 to 5.9μg/g and 1.7 to 2.8μg/g,*** percentages for Sp and SpNO were from 22.2%to 30.5%and 36.1%to 43.9%.In the mixed PAs/PANOs systems,stronger sorption of PAs over PANOs was occurred in tested ***,the Freundlich models more precisely described the sorption/desorption *** exchange capacity,sand content and total nitrogen were identified as major influencing factors by linear regression ***,the soils exhibiting higher sorption capacities for compounds with greater *** were more likely to migrate within soils and be absorbed by tea *** contributes to the understanding of environmental fate of PAs/PANOs in tea plantations and provides basic data and clues for the development of PAs/PANOs reduction technology.

关键词： Pyrrolizidine alkaloids Sorption-desorption behavior Tea plantation system Acidic soil Linear regression model

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ON LEGENDRE ANDLYZZELLIPSOIDS

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Acta Mathematica Scientia 2025年第1期45卷 180-188页

作者： Xinbao lu Ge XIONGG Jiangyan TAO School of Mathematical Sciences Key Laboratory of Intelligent Computing and Applications(Ministry of Education)Tongji UniversityShanghai200092China

We study the Legendre ellipsoid and the LYZ ***,we give a direct proof of the Cramer-Rao inequality for convex ***,we prove that origin-centered ellipsoids are the only convex bodies with identical Löwner and Legendre... 详细信息

关键词： Legendre ellipsoid LYZ ellipsoid Lowner ellipsoid

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The effect of fine grits and fine debris concentrations on the MLVSS/MLSS ratio of an activated sludge system

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Journal of Environmental Sciences 2025年第1期147卷 607-616页

作者： Zhao Jiang Zhiheng Xia Shuai Liu QiWei Haitao Fan lu Qi Guohua Liu Hongchen Wang Low-carbon Water Environment Technology Research Center School of Environment&Natural ResourcesRenmin University of ChinaBeijing 100872China

This study embarks on an explorative investigation into the effects of typical concentrations and varying particle sizes of fine grits(FG,the involatile portion of suspended solids)and fine debris(FD,the volatile yet unbiodegradable fraction of suspended solids)within the influent on themixed liquor volatile suspended solids(MLVSS)/mixed liquor suspended solids(MLSS)ratio of an activated sludge *** meticulous experimentation,it was discerned that the addition of FG or FD,the particle size of FG,and the concentration of FD bore no substantial impact on the pollutant removal efficiency(denoted by the removal rate of COD and ammonia nitrogen)under constant operational ***,a notable decrease in the MLVSS/MLSS ratio was observed with a typical FG concentration of 20 mg/L,with smaller FG particle sizes exacerbating this ***,variations in FD concentrations influenced both MLSS andMLVSS/MLSS ratios;a higher FD concentration led to an increased MLSS and a reduced MLVSS/MLSS ratio,indicating FD accumulation in the system.A predictive model for MLVSS/MLSS was constructed based on quality balance calculations,offering a tool for foreseeing the MLVSS/MLSS ratio under stable long-term influent conditions of FG and *** model,validated using data from the BXH wastewater treatment plant(WWTP),showcased remarkable accuracy.

关键词： Fine grits and fine debris Activated sludge system MLVSS/MLSS ratio Predictive model

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Controllable synthesis of biomimetic wood stem nanoporous high entropy oxides catalysts for oxygen evolution reaction

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Nano Research 2025年第1期18卷 107-117页

作者： Wei Wang Weiqi Wang Huihui Wang Xing lu Jinwen Zhang Yunzhuo lu School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028China School of Intelligence and Electronic Engineering Dalian Neusoft University of InformationDalian 116023China Guangdong Key Laboratory of Materials and Equipment in Harsh Marine Environment Guangzhou Maritime UniversityGuangzhou 510725China

Bubbles generated during the oxygen evolution reaction(OER)in water splitting readily adhere to the electrode surface,thereby impeding contact between the electrolyte and the active sites,thereby increasing the ***,it is imperative to elucidate the bubble release behavior and engineer electrodes that facilitate faster bubble *** this study,inspired by the wood stem of the Norway spruce,we synthesized a gradient nanoporous high-entropy oxide(GNP-HEO)electrode with a controllable pore *** GNP-HEO,featuring a well-controlled gradient in pore size,is achieved through a straightforward strategy combining selective laser melting with selective phase *** unique gradient nanoporous structure not only facilitates bubble release but also diminishes the bubble shielding effect in OER,thereby enhancing electrocatalytic *** affect interaction of Al,Co,Cr,Fe,and Ni,coupled with the gradient nanoporous structure,yields exceptional OER performance,evidenced by an overpotential of 250 mV at a current density of 50 mA/cm^(2) and a Tafel slope of 38.0 mV/dec in 1 M *** functional theory calculations confirm that the GNPHEO adheres to the adsorbate evolution mechanism reaction pathway and exhibits significant *** work highlights a promising approach for the design and synthesis of high-performance OER electrocatalysts.

关键词： oxygen evolution reaction high-entropy oxides selective phase dis-solution selective laser melting gradient nanoporous

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Computational protein design and structure prediction——the 2024 Nobel prize in chemistry

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Science China Chemistry 2025年第3期 812-814页

作者： Peilong lu Lei Liu School of Life Sciences and Research Center for Industries of the Future Westlake University Tsinghua-Peking Joint Center for Life Sciences Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical BiologyCenter for Synthetic and Systems BiologyDepartment of ChemistryTsinghua University

The 2024 Nobel prize in chemistry recognizes groundbreaking advancements in protein science,highlighting the power of artificial intelligence(AI) to decipher and design the molecular machinery of *** of the prize was awarded to David Baker for the computational design of proteins;the other to demis Hassabis and John Jumper for their AI-driven predictions of protein structures.

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First observation results of Macao Science Satellite-1 on lightning-induced electron precipitation

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Science China Earth Sciences 2025年第1期68卷 1-10页

作者： Yongping WANG Yixin SUN Qiugang ZONG Gaopeng lu Xudong GU Ze-Jun HU Bin LI Key Laboratory for Polar Science Ministry of Natural ResourcesPolar Research Institute of ChinaShanghai 200136China Institute of Space Physics and Applied Technology Peking UniversityBeijing 100871China State Key Laboratory of lunar and Planetary Science Macao University of Science and TechnologyMacao 999078China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China School of Electronic Information Wuhan UniversityWuhan 430072China

The Medium-energy Electron Spectrometers(MES)is a space-borne instrument onboard Macao Science Satellite-1(MSS-1)dedicated to monitoring the typical charged particle radiation characteristics in the satellite orbit and the process of their occurrence and development,including short bursts of lightning-induced electron precipitation(LEP).This paper presents the first results of the LEP measurements by the MSS-1.47 LEP events are identified with the routine operation for 3 months since satellite launch,all within the range of 1.5definitively geo-located for these LEP *** LEP events occur withindetectors,MSS-1can present in-situ observations of large regions of enhanced background precipitation and reveal their fine spatiotemporal characteristics and spectral *** collaborative VLF ground-based measurements at the Great Wall Station,Antarctica also have a good correspondence with LEP measurements of *** observations also imply that lightning activity has a modulation effect on the energetic electron energy-spatial structure.

关键词： Lightning-induced electron precipitation Inner radiation belts Energetic electrons Macao Science Satellite-1

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Causal Associations between Particulate Matter 2.5(PM_(2.5)),PM_(2.5)Absorbance,and Inflammatory Bowel Disease Risk:Evidence from a Two-Sample Mendelian Randomization Study

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Biomedical and Environmental Sciences 2025年第2期38卷 167-177页

作者： Xu Zhang Zhimeng Wu lu Zhang Binglong Xin Xiangrui Wang Xinlan lu Guifang lu Mudan Ren Shuixiang He Yarui Li department of Gastroenterology the First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061ShaanxiChina Shannxi clinical research center of digestive disease(cancer division) Xi’an 710061ShaanxiChina Health Science Center Xi’an Jiaotong UniversityXi’an 710061ShaanxiChina department of Urology Ren Ji HospitalShanghai Jiao Tong University School of MedicineShanghai 200001China State Key Laboratory of Systems Medicine for Cancer Shanghai Cancer InstituteShanghai 200001China Shanxi Institute of Science and Technology Jincheng 048011ShanxiChina

Objective Several epidemiological observational studies have related particulate matter(PM)exposure to Inflammatory bowel disease(IBD),but many confounding factors make it difficult to draw causal links from observational *** objective of this study was to explore the causal association between PM_(2.5)exposure,its absorbance,and *** We assessed the association of PM_(2.5)and PM_(2.5)absorbance with the two primary forms of IBD(Crohn’s disease[CD]and ulcerative colitis[UC])using Mendelian randomization(MR)to explore the causal *** conducted two-sample MR analyses with aggregated data from the UK Biobank genome-wide association ***-nucleotide polymorphisms linked with PM_(2.5)concentrations or their absorbance were used as instrumental variables(IVs).We used inverse variance weighting(IVW)as the primary analytical approach and four other standard methods as supplementary analyses for quality *** The results of MR demonstrated that PM_(2.5)had an adverse influence on UC risk(odds ratio[OR]=1.010;95%confidence interval[CI]=1.001–1.019,P=0.020).Meanwhile,the results of IVW showed that PM_(2.5)absorbance was also causally associated with UC(OR=1.012;95%CI=1.004–1.019,P=0.002).We observed no causal relationship between PM_(2.5),PM_(2.5)absorbance,and *** results of sensitivity analysis indicated the absence of heterogeneity or pleiotropy,ensuring the reliability of MR *** Based on two-sample MR analyses,there are potential positive causal relationships between PM_(2.5),PM_(2.5)absorbance,and UC.

关键词： Particulate matter 2.5 Inflammatory bowel disease Mendelian randomization

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Ultrasonic humidifier aerosols:Observed high heavy metal enrichment and a new emission control method

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Journal of Environmental Sciences 2025年第2期148卷 298-305页

作者： Tao Zhang Xiaohui lu Ruoyu Zhang Xinghua Jiang Shanye Yang Xiewen Ma Qianqian Gao Xiaofei Wang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Ultrasonic humidifiers are commonly used in households to maintain indoor humidity and generate a large number of droplets or spray ***,there have been various health concerns associated with humidifier use,largely due to aerosols generated during ***,we investigated the size distribution,chemical composition,and charged fraction of aerosol particles emitted from commercial ultrasonic *** metals in water used for humidifiers were found to be highly enriched in the ultrasonic humidifier aerosols(UHA),with the enrichment factors ranging from 102 to *** enrichment may pose health concerns for the building occupants,as UHA concentrations of up to 106 particles/cm^(3) or 3 mg/m^(3) were ***,approximately 90%of UHA were observed to be electrically charged,for the first time according to our *** on this discovery,we proposed and tested a newmethod to remove UHA by using a simple electrical *** designed electrical field in this work can efficiently remove 81.4%of ***,applying this electrical field could be an effective method to significantly reduce the health risks by UHA.

关键词： Ultrasonic humidifier aerosols Water-to-Air transfer Heavy metal Enrichment factor Electrical field

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How do Notch Shape and Boundary Conditions Affect the Hydro-Mechanical Behavior of Fractured Geomaterials?Findings via the Darcy-Brinkman-Biot Approach

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Journal of Earth Science 2025年第1期36卷 351-356页

作者： Yi-Xiang Wang Xiao-Pei Guo Ling Xu Shi-Feng lu department of Civil Engineering School of Human Settlements and Civil EngineeringXi'an Jiaotong UniversityXi'an 710049China China Construction Eighth Engineering Division Co. Ltd.Southwest BranchChengdu 610041China

0 INTRODUCTION Natural geomaterials,including soils and rocks,are invariably exposed to intricate stress conditions,in addition to water pressure,in various engineering contexts such as foundation treatment,mining,and *** geomaterials frequently contain numerous fractures,which significantly influence hydrological dynamics as water permeates through them,leading to processes like expansion and bifurcation(Shu et al.,2023;Tran and Jha,2021;Lei et al.,2017;Wang et al.,2015).

关键词： bifurcation invar mining

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Effect of electroacupuncture on pain after periodontal flap surgery:a randomized controlled trial

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Journal of Traditional Chinese Medicine 2025年第1期45卷 184-191页

作者： Emre Bulut Didem ?zkal Emino?lu Yasemin ?ay?r department of Periodontology Faculty of DentistryAtatürk University department of Family Medicine Faculty of MedicineAtatürk University

OBJECTIVE: To examine the effect of electroacupuncture(EA) application on postoperative pain levels and the amount of analgesic use in patients who underwent periodontal flap surgery. METHODS: In this prospective, randomized and controlled study, patients planned for periodontal surgery were divided into two groups [EA group(n = 22): patients who received electroacupuncture and control group(n = 22): patients who did not receive electroacupuncture]. Electroacupuncture was applied bilaterally to the Hegu(LI4), Daying(ST5), and Jiache(ST5) points of the patients in the EA group immediately before and after the flap surgery for 30 min at a frequency of 50 Hz to each point at a current that the patient could tolerate. The patients in the control group underwent flap surgery without applying electroacupuncture. Patients were asked to record their pain levels on the visual analog scale and the number of analgesic tablets they took during the 7 postoperative days on the given form. RESULTS: The total mean score of pain felt in the EA group(16.60 ± 2.78) was found to be significantly lower than that in the control group(31.37 ± 2.78)(P = 0.001). No significant difference was found between the groups regarding the amount of analgesics taken(4.77 ± 4.72, 5.82 ± 3.11)(P = 0.111). CONCluSIONS: Our study shows that electroacupuncture application is beneficial in reducing pain after periodontal flap surgery. Overall, more research is needed to fully understand the effects of electroacupuncture on postoperative pain.

关键词： analgesics electroacupuncture pain, postoperative periodontitis randomized controlled trial

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