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Cellular Cd^(2.)fluxes in roots confirm increased Cd availability to rice(Oryza sativa L.)induced by soil acidifications

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Journal of Environmental Sciences 2024年第5期139卷 516-526页

作者： Xiaoyi Sun Meng wang Luyao Qin Lei Yu Jing wang {2. Zheng Wenneng Zhou Shibao {2. State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhou 510006China

Soil acidifications become one of the main causes restricting the sustainable development of agriculture and causing issues of agricultural product *** order to explore the effect of different acidification on soil cadmium(Cd)availability,soil pot culture and hydroponic(soil potting solution extraction)were applied,and non-invasive micro-test technique(NMT)was *** three different soil acidification processes were simulated,including direct acidification by adding sulfuric acid(AP1.,acid rain acidification(AP2.by adding artificial simulated acid rain and excessive fertilization acidification by adding(NH_(4))_(2.SO_(4)(AP3).The results showed that for direct acidification(AP1.,DTPA-Cd concentration in field soils in Liaoning(S1.and Zhejiang(S2.increased by 0.1.7-0.2.0} mg/kg and 0.1.1-0.346 mg/kg,respectively,compared with control *** soil pH decreased by 0.45 units in S1.the Cd content of rice stems,leaves and roots increased by 0.48 to 6.04 mg/kg and 2.58 to 1..84mg/kg,respectively,When the pH value of soil S1.and S2.decreased by 0.2. units,the average velocity of Cd^(2.)at 2.0μm increased by 1..03-33.1. pmol/cm~2.sec and 2.0}33-52.86pmol/cm^(2./sec,respectively,and followed the order of AP3>AP2.*** summary,different acidification measures would improve the effectiveness of Cd,under the same pH reduction condition,fertilization acidification increased Cd availability most significantly.

关键词： Soil acidification Cadmium Non-invasive micro-test technique Bioavailability

Peroxidase-like active Cu-ZIF-8 with rich copper(I)-nitrogen sites for excellent antibacterial performances toward drug-resistant bacteria

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Nano Research 2024年第8期17卷 7427-7435页

作者： Xiaoze wang Hui wang Jingkun Z{2.g Ning {2. Wenjun Ma Donghai Z{2.g Mingshui Yao Xianliang wang Yunfa chen State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China university of the Chinese Academy of Sciences Beijing 100049China Laboratory of Theoretical and Computational Nanoscience CAS Key Laboratory of Nanosystem and Hierarchial FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China

Bacterial pathogens pose a serious threat to human health,and there is an urgent need to develop highly effective antibacterial materials to eliminate the increasingly serious contamination of drug-resistant ***,a Cu-doped ZIF-8 particle with unsaturated copper exhibits high peroxidase-like activity.99.998%antibacterial efficiency against *** can be achieved for 30 min at a low concentration of 50μg·mL^(−1.,as well as complete sterilization against ***(up to 8 log).99.999%antibacterial efficiency against Methicillin-resistant Staphylococcus aureus can be achieved,performing orders of magnitude higher than *** mechanism shows that the unsaturated Cu-Nx sites are enzyme-like active centers,which could promote the consumption of bacteria reducing substances by H_(2.O_(2.,and the generated*OH further aggravates bacterial oxidative stress and membrane *** importantly,the oxidation activity of adsorbed oxygen species on Cu-ZIF-8 is enhanced by charge transfer and structural changes between the ligand and copper center like natural ***-doped ZIF-8 with peroxidase-like activity shows great potential in antibacterial application and the revealed catalytic mechanism is helpful for understanding the high antibacterial activity of nanoparticles with Cu-Nx sites.

关键词： Cu-doped ZIF-8 peroxidase-like reactive oxygen species(ROS) catalytic mechanism antibacterial activity

Engineering FeOOH/Ni(OH)_(2. heterostructures on Ni_(3)S_(2.surface to enhance seawater splitting

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Rare Metals 2024年第5期43卷 1989-1998页

作者： chen Yang Ya-Dong Li Li-Juan Cao Xi-Long {1. {2.-Pu Liang Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China

The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in ***,FeOOH/Ni(OH)_(2.heterostructure supported on Ni_(3)S_(2.-covered nickel foam(Fe–Ni/Ni_(3)S_(2./NF)was fabricated by hydrothermal and etching methods,as well as anodic oxidation *** electronic structure of FeOOH and Ni(OH)_(2.could be modulated after depositing FeOOH nanoparticles on Ni(OH)_(2.nanosheet,which greatly boosted the catalytic *** the catalyst used as an electrode for oxygen evolution reaction(OER),it needed low overpotentials of 2.6 and 368 m V to achieve current densities of 1.0 and 800 m A·cm^(-2.,respectively,in 1.mol·L^(-1.KOH+seawater *** can operate continuously at 1.0 m A·cm^(-2.for 400 h without obvious ***,in situ generated SO_(4)^(2.)from inner Ni_(3)S_(2.during electrolysis process would accumulate on the surface of active sites to form passivation layers to repel Cl^(-),which seemed to be responsible for superior *** study not only synthesizes an OER catalyst for highly selective and stable seawater splitting,but also gives a novel approach for industrial hydrogen production.

关键词： Anodic oxidation Heterostructure Oxygen evolution reaction Seawater splitting

Jetting of a near-wall cavitation bubble induced by another tandem bubble

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Journal of Hydrodynamics 2024年第3期36卷 444-456页

作者： Hui han Jing-zhu {1. Jian-lin Huang Peng-bo Bai Yong-gang {2. Yi-wei {1. Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China Guangdong Aerospace Research Academy Guangzhou511458China School of Future Technology University of Chinese Academy of SciencesBeijing100049China Jianghuai Advance Technology Center Hefei230088China

Double bubbles near a rigid wall surface collapse to produce a significant jet impact,with potential applications in surface cleaning and ultrasonic ***,the dynamic behaviors of near-wall bubbles remain *** this study,we investigate the jetting of a near-wall bubble induced by another tandem *** define two dimensionless standoff distances,γ_(1.,γ_(2.,to represent the distances from the center of the near-wall bubble to the rigid wall and the center of controlling bubble to the center of the near-wall bubble,*** observations reveal three distinct jetting regimes for the near-wall bubble:transferred jetting,double jetting,and directed *** further investigate the jetting mechanism,numerical simulations are conducted using the compressibleInterFoam solver in the open-source framework of OpenFOAM.A detailed analysis shows that the transferred jet flow is caused by the pinch-off resulting from the axial contraction velocity at the lower end of the near-wall bubble being greater than the vertical contraction velocity,leading to a maximum jet velocity of 682.58 m/*** the case of double jetting,intense stretching between the controlling bubble and the wall leads to a pinch-off and a double jetting with a maximum velocity of 1.96.2. m/*** directed jet flow is caused by the downward movement of the high-pressure region generated by the premature collapse of the controlling bubble,with the maximum jet velocity reaching 444.62.m/s.

关键词： Jetting of near-wall bubble controlling bubble impact velocity

Measuring-basis-encrypted six-state quantum key distribution scheme

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Progress in Natural Science:Materials International 2006年第1期16卷 84-89页

作者： chen Pan1. DENG Fuguo1. {1. Pingxiao1.and LONG Guilu1.2.(Key Laboratory for Quantum Information and Measurements and Department of {2., tsinghua university, beijing 1.0084, China 2. Key Laboratory for Atomic and Molecular NanoSciences, tsinghua university, beijing 1.0084, China) [a]Department of physics Tsinghua University Key Laboratory for Quantum Information and Measurements Beijing China [b]tsinghua {1. Key Laboratory for Atomic and Molecular NanoSciences Beijing China

A six-state quantum key distribution scheme with measuring-basis encryption technique, which is based on the six-state protocol and the MBE protocol, is proposed. In this modified six-state quantum key distribution protocol, Alice and Bob use a control key to synchronize the use of their measuring-basis so that they always use the same measuring-basis. This modified six-state quantum key distribution protocol retains the advantage of higher security and at the same time has a higher efficiency.

关键词： quantum key distribution measuring-basis encrypted six-state security.

Degradation of 4-chlorophenol in aqueous solution by γ-radiation and ozone oxidation

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Science China Chemistry 2006年第2期49卷 186-192页

作者： HU Jun1. wang Jianlong1.2.& {1. Rong1.1. Laboratory of Environmental Technology, Institute of Nuclear Energy Technology,{2., beijing 1.0084, China 2. State Key Joint Laboratory of Environmental Simulation and Pollution Control,{2., beijing 1.0084, China Correspondence should be addressed to wang Jianlong 1. Laboratory of Environmental Technology Institute of Nuclear Energy Technology Tsinghua University Beijing 100084 China 2. State Key Joint Laboratory of Environmental Simulation and Pollution Control Tsinghua University Beijing 100084 China

The degradation of 4-chlorophenol (4-CP) by using gamma rays generated by a 60Co source in the presence of O3 was investigated. The radiolysis of 4-CP and the kinetics of 4-CP min-eralization were analyzed based on the determination of total organic carbon (TOC). The influence of initial 4-CP concentration and the free radicals scavengers (such as NaHCO3 and t-butanol) on the 4-CP degradation was also studied. The results showed that when the radiation rate was 336 Gy·min?1. 4-chlorophenol at concentration of 1. mg·L?1.could be completely degraded at the radiation dose of 2.kGy. The degradation of 4-chlorophenol could be described by a first-order reaction model, the rate constant of 4-CP degradation by combined ozonation and radiation was 0.1.16 min?1. which was 2.4 times higher t{1. the sum of radiation (0.02.4 min?1. and ozonation (0.01.7 min?1.. It re-vealed that the combination of radiation and ozonation resulted in synergistic effect, which can re-markably increase the degradation efficiency of 4-CP.

关键词： radiolysis, 4-chlorophenol, priority pollutant, degradation, O3, synergistic effect, kinetics.

Expansion and improvement of ChinaMu by MuT-seq and chromosome-level assembly of the Mu-starter genome

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Journal of Integrative Plant Biology 2024年第4期66卷 645-659页

作者： Lei Liang Yuancong wang Yanbin {1. Yicong {2. Mengfei Li Yibo Wu Zeyang Ma {1. Zhao Rentao Song State Key Laboratory of Maize Bio-breeding Frontiers Science Center for Molecular Design BreedingJoint International Research Laboratory of Crop Molecular BreedingNational Maize Improvement CenterCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100091China Institute of Crop Germplasm and Biotechnology Jiangsu Provincial Key Laboratory of AgrobiologyJiangsu Academy of Agricultural SciencesNanjing 210014China Sanya Institute of China Agricultural university Sanya 572025China Hainan Yazhou Bay Seed Laboratory Sanya 572025China

ChinaMu is the largest sequence-indexed Mutator(Mu)transposon insertional library in maize(Zea mays).In this study,we made significant improvements to the size and quality of the ChinaMu *** developed a new Mu-tag isolation method Mu-Tn5-seq(MuT-seq).Compared to the previous method used by ChinaMu,MuT-seq recovered 1.3 more germinal insertions,while requiring only about 1.14 of the sequencing volume and 1.5 of the experimental *** MuT-seq,we identified 1.3,879 germinal insertions from 3,1.8 Mu-active F1.*** also assembled a high-quality genome for the Mu-active line Mu-starter,which harbors the initial active MuDR element and was used as the pollen donor for the mutation *** the Mu-starter genome,we recovered 33,662.1..6%)additional germinal insertions in 3,2.4(7.4%)genes in the Mu-starter *** Mu-starter genome also improved the assignment of 1.7,689(54.5%)germinal *** newly upgraded ChinaMu dataset currently contains 2.0},889 high-quality germinal *** insertions cover 32.2.4 pan-genes in the Mu-starter and B73Ref5 genomes,including 2.,006(80.4%)core genes shared by the two *** a test model,we investigated Mu insertions in the pentatricopeptide repeat(PPR)superfamily,discovering insertions for 92.(449/487)of PPR genes in ChinaMu,demonstrating the usefulness of ChinaMu as a functional genomics resource for maize.

关键词： ChinaMu Mutator MuT-seq PPR gene Zea mays

Antitumor effects of a novel photosensitizer-mediated photodynamic therapy and its influence on the cell transcriptome

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Oncology Research 2024年第5期32卷 911-923页

作者： JINGJING chen DAN {1. ZEQUN {1. MENGYUAN han HOUQING YIN WENTING ZHOU RIBAI YAN YAN PAN Department of Pharmacology School of PharmacyChangzhi Medical CollegeChangzhiChina2 Department of PharmacologySchool of Basic Medical SciencesHealth Science CenterPeking UniversityBeijingChina3 Beijing Key Laboratory of Tumor Systems BiologyPeking UniversityBeijingChina4 Department of PharmacologyXinjiang Medical UniversityUrumqiChina5 School of Pharmaceutical SciencesPeking UniversityBeijingChina

Photodynamic therapy(PDT)is a promising cancer *** study investigated the antitumor effects and mechanisms of a novel photosensitizer meso-5-[ρ-diethylene triamine pentaacetic acid-aminophenyl]−1.,1.,2.-triphenyl-porphyrin(DTP)mediated PDT(DTP-PDT).Cell viability,reactive oxygen species(ROS),and apoptosis were measured with a Cell Counting Kit-8 assay,DCFH-DA fluorescent probe,and Hoechst staining,*** apoptosis-and autophagy-related proteins were examined using western *** sequencing was used to screen differentially expressed mRNAs(DERs),and bioinformatic analysis was performed to identify the major biological events after *** results show that DTP-PDT inhibited cell growth and induced ROS generation in MCF-7 and SGC7901.*** ROS scavenger N-acetyl-L-cysteine(NAC)and the P38 MAPK inhibitor SB2.3580 alleviated DTP-PDT-induced ***-PDT induced cell apoptosis together with upregulated Bax and downregulated Bcl-2.which could also be inhibited by NAC or *** level of LC3B-Ⅱ,a marker of autophagy,was increased by DTP-PDT.A total of 3496 DERs were obtained after *** Ontology and Kyoto Encyclopedia of Genes and Genomes analyses indicated that DERs included those involved in cytosolic ribosomes,the nuclear lumen,protein binding,cell cycle,protein targeting to the endoplasmic reticulum,and ribosomal DNA *** Ontology and Reactome enrichment analyses indicated that DERs were associated with a variety of cancers and cell cycle ***-protein interaction results demonstrated that cdk1.and rps2.a ranked in the top 1. interacting ***,DTP-PDT could inhibit cell growth and induce cell apoptosis and autophagy,partly through ROS and the P38 MAPK signaling *** associated with the cell cycle,ribosomes,DNA replication,and protein binding may be the key changes in DTP-PDT-mediated cytotoxicity.

关键词： Photodynamic therapy ROS Apoptosis Autophagy Bioinformatic analysis

High Density 3D Carbon Tube Nanoarray Electrode Boosting the Capacitance of Filter Capacitor

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Nano-Micro Letters 2024年第11期16卷 242-254页

作者： Gan chen Fangming {1. Huachun Ma Pei Li Ziyan Zhou Pengxiang {2. Xiaoyan Li Guowen Meng Bingqing Wei Key Laboratory of Materials physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031People’s Republic of China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026People’s Republic of China Department of Mechanical Engineering University of DelawareNewarkDE 19716USA Mechano‑X Institute Applied Mechanics LaboratoryDepartment of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China

Electric double-layer capacitors(EDLCs)with fast frequency response are regarded as small-scale alternatives to the commercial bulky aluminum electrolytic *** carbon-based nanoarray electrodes with precise alignment and smooth ion channels is crucial for enhancing EDLCs’***,controlling the density of macropore-dominated nanoarray electrodes poses challenges in boosting the capacitance of line-filtering ***,a simple technique to finely adjust the vertical-pore diameter and inter-spacing in three-dimensional nanoporous anodic aluminum oxide(3D-AAO)template is achieved,and 3D compactly arranged carbon tube(3D-CACT)nanoarrays are created as electrodes for symmetrical EDLCs using nanoporous 3D-AAO template-assisted chemical vapor deposition of *** 3D-CACT electrodes demonstrate a high surface area of 2.3.0 m^(2. g^(−{2.,a D/G band intensity ratio of 0.94,and a C/O atomic ratio of *** a result,the high-density 3D-CT nanoarray-based sandwich-type EDLCs demonstrate a record high specific areal capacitance of 3.2. mF cm^(-2. at {2.0 Hz and exceptional fast frequency response due to the vertically aligned and highly ordered nanoarray of closely packed CT *** 3D-CT nanoarray electrode-based EDLCs could serve as line filters in integrated circuits,aiding power system miniaturization.

关键词： Compactly arranged Three-dimensional carbon tube nanoarray Dimensional carbon tube nanoarray Fast frequency response Electric double-layer capacitors Layer capacitors AC line-filtering Filtering