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微塑料对生物除磷工艺的影响及微生物学机制探究

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水处理技术 2024年第8期50卷 75-80页

作者：王宏涛姜楠李洋雷恒黄河水利职业技术学院河南开封475004 河南省跨流域区域引调水运行与生态安全工程研究中心河南开封475004 河南省水文水资源中心河南郑州450003

微塑料(MPs)是生活废水内常被检出的新污染物,然而关于MPs如何影响强化生物除磷工艺及相关机制的研究较少。因此,本工作构建了序批式EBPR工艺,通过控制进水聚苯乙烯微塑料浓度,考察了MPs对EBPR的影响并揭示相关机制。结果表明,MPs对EBP... 详细信息

微塑料(MPs)是生活废水内常被检出的新污染物,然而关于MPs如何影响强化生物除磷工艺及相关机制的研究较少。因此,本工作构建了序批式EBPR工艺,通过控制进水聚苯乙烯微塑料浓度,考察了MPs对EBPR的影响并揭示相关机制。结果表明,MPs对EBPR具有剂量效应,低于0.3 mg/LMPs对EBPR性能及污泥特征影响不明显,而超过3.0 mg/LMPs降低了EBPR对污染物和营养盐的去除,并降低污泥浓度,提高胞外聚合物含量。在10.0 mg/L MPs组别内,COD、NH_(4)^(+)-N和总磷(TP)去除率分别下降至84.6%~89.5%、84.9%~89.6%和74.6%~77.8%,污泥浓度下降至4.08~4.16 g/L,但EPS含量增加至123.6~126.5 mg/g。机制分析表明MPs抑制了厌氧阶段TP的释放及好氧阶段TP的吸收。高浓度MPs降低了与污染物和营养盐去除相关关键酶的活性。MPs降低了微生物Proteobacteria和Chloroflexi门级别的相对丰度。研究结果为EBPR工艺处理含MPs废水提供一定的数据支撑。

关键词： EBPR 微塑料污泥特征关键酶活性微生物

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Charge transfer complex enabled photoreduction of ether phosphonium salts for the selective oxyalkylation of enamides

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Chinese Chemical Letters 2024年第2期35卷 411-414页

作者： Sen Qiao Kunquan Chen Qiang Liu Zhixiang wang Xiangyu Chen School of Chemical Sciences University of the Chinese Academy of SciencesBeijing 100049China Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou 256606China

A charge transfer complex(CTC)-enabled photoreduction of ether phosphonium salts for the generation of oxyalkyl radicals was *** photoreduction provides a convenient method to achieve selective oxyalkylation of enamid... 详细信息

关键词： Enamides Phosphonium salts Ethers Charge transfer complex Visible light

Seizure as the main presenting manifestation of three patients with acute glufosinate-ammonium poisoning

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第4期25卷 354-358页

作者： Ping wang Congying SONG Xuan LU Yuanqiang LU Department of Emergency Medicine the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 3100030 China Zhejiang Key Laboratory for Diagnosis and Treatment of Physic chemical and Aging related Injuries Hangzhou 310003China Department of Geriatric Medicine the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China

Glufosinate-ammonium herbicides are the most widely used broad-spectrum,non-selective herbicides in the ***-ammonium is a structural analogue of glutamate(Glu)which can irreversibly inhibit the activity of glutamine synthetase(GS)and Glu decarboxylase in plants,thereby blocking the synthesis of glutamine(Gln)from Glu and ammonia(Hoerlein,1994).This causes the plants to die because of the nitrogen metabolism disorder and subsequent intracellular accumulation of *** humans,the characteristic features of glufosinate-ammonium herbicide poisoning include gastrointestinal symptoms and neurotoxicity(Watanabe and Sano,1998).

关键词： ammonium ammonia thereby

Trifluoromethyl enable high-performance single-emitter white organic light-emitting devices based on quinazoline acceptor

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Chinese Chemical Letters 2024年第4期35卷 442-446页

作者： Xiangan Song Shaogang Shen Mengyao Lu Ying wang Yong Zhang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Photochemical Conversion and Optoelectronic Materials and TIPC-CityU Joint Laboratory of Functional Materials and DeviceChinese Academy of SciencesTechnical Institute of Physics and ChemistryBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Single-emitter white organic light-emitting diode(WOLED) based on small organic molecule exhibits great potential in simplifying fabrication process of WOLEDs. However, the design and synthesis of molecule for highly efficient single-emitter WOLED still remains a challenge. Herein, two asymmetric donor-acceptor-acceptor'(D-A-A') type molecule(PTZ-PQ-F and PTZ-PQ-CF3) are developed by employing trifluoromethyl(CF_(3)) or fluorine atom as secondary acceptor, which can exhibit white lighting with dual emission bands consisting of blue traditional fluorescence from quasi-axial(ax) conformer and orange thermally activated delayed fluorescence(TADF) from quasi-equatorial(eq) conformer. The introduction of CF_(3) into PTZ-PQ-CF3 greatly enhanced the photoluminescence quantum yield(PLQY) by suppressing the nonradiative deactivation. Owing to electron-inductive-effect of CF3, the “eq” conformer of PTZ-PQCF3 exhibits a much smaller ΔESTof 0.01 e V to realize more efficient reverse intersystem crossing(RISC)process, and then enhance the exciton utilization(nearly 100%) of the whole dual emission system. Consequently, single-emitter WOLEDs based on PTZ-PQ-CF3 show nearly standard white emission with EQE of 13.0% and CIE of(0.35, 0.36) in m CP host and show warm white emission with high EQE of 25.5%and CIE of(0.40, 0.47) in 35 Dcz PPy host, which are the best performance among reported single-emitter WOLEDs.

关键词： Single-emitter white organic light-emitting diode Conformational isomerism Thermally activated delayed fluorescence Trifluoromethyl Exciton utilization

The impact of broad glutamine metabolism inhibition on the tumor microenvironment

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Genes & Diseases 2024年第3期11卷 2-4页

作者： Tianhe Li Yun-Ta Chuang Tian-Li wang Departments of Pathology Oncologyand Gynecology and ObstetricsThe Sidney Kimmel Comprehensive Cancer CenterJohns Hopkins University School of MedicineBaltimoreMD 21231USA

Glutamine is an importantα-amino acid that provides carbon and nitrogen sources for the biosynthesis of nucleotides,proteins,and *** also generates metabolites that fuel the tricarboxylic acid cycle and maintain intracellular redox *** cells have a heightened metabolic dependence on glutamine to support incessant tumor growth and mitigate tumor microenvironmental stresses including hypoxia,nutrient depletion.

关键词： metabolism tumor microenvironment

水力渗透型煤矿采空区三维音频大地电磁快速解译

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矿业安全与环保 2024年第1期51卷 70-77页

作者：王楠王子健秦其明孙千惠李树超北京信息科技大学网络文化与数字传播北京市重点实验室北京100192 北京信息科技大学计算机学院北京100192 北京大学遥感与地理信息系统研究所北京100871 中国昆仑工程有限公司北京100037 中国科学院空天信息创新研究院北京100190

煤矿采空区或回采阶段工作面常面临水力渗透威胁,如何快速有效且低成本地预判水力渗透成为难题。提出并系统论述了一种面向水力渗透型采空区的音频大地电磁三维反演及快速解译方案。通过设计采空区理论地电模型,探讨采空区电阻率三维反... 详细信息

煤矿采空区或回采阶段工作面常面临水力渗透威胁,如何快速有效且低成本地预判水力渗透成为难题。提出并系统论述了一种面向水力渗透型采空区的音频大地电磁三维反演及快速解译方案。通过设计采空区理论地电模型,探讨采空区电阻率三维反演可行性。实测数据反演解释结果揭示:采空区巷道顶板区域存在明显低阻分布,部分工作面存在顶板裂隙导水造成的富水低阻区域,局部垮落带与上覆含水层明显连通。为可疑透水位置定位、水位和涌水量监测,以及后续开采规划制订提供了参考。从理论和实证角度,为音频大地电磁法的采空区富水状态分析和动态监控应用提供了新思路,相关方法能够有效提高水力渗透型采空区的解译效果。

关键词：煤矿采空区水力渗透天然源音频大地电磁法三维反演

Implantable probe with integrated reference electrode for in situ neural signal and calcium ion monitoring

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Bio-Design and Manufacturing 2024年第4期7卷 591-595页

作者： Junyu Xiao Mengfei Xu Longchun wang Bin Yang Jingquan Liu National Key Laboratory of Advanced Micro and nano Manufacture Technology Shanghai Jiao Tong UniversityShanghai 200240China Department of Micro/nano Electronics Shanghai Jiao Tong UniversityShanghai 200240China

Monitoring the electrophysiology activity of neurons and blood calcium signals can enable a better understanding of disease-related neural system ***,currently,in situ calcium ion monitoring tools are scarce and exhibit low integration and limited *** this letter,we propose an implantable probe with an integrated in situ Ag/AgCl reference electrode(ISA/ARE)that can monitor action potential(AP)and Ca^(2+) concentrations.

关键词： neural electrode enable

Impact of mica on geotechnical behavior of weathered granitic soil using macro and micro investigations

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2250-2266页

作者： Xianwei Zhang Xinyu Liu Haodong Gao Gang wang Ran An Zhu Liang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China School of Civil and Hydraulic Engineering Huazhong University of Science and TechnologyWuhan430074China College of Urban Construction Wuhan University of Science and TechnologyWuhan430065China University of Chinese Academy of Sciences Beijing100049China guangzhou Urban Planning&Design Survey Research Institute Guangzhou510000China guangdong Enterprise Key Laboratory for Urban Sensing Monitoring and Early WarningGuangzhou510000China

The micaceous weathered granitic soil(WGS)is frequently encountered in civil engineering worldwide,unfortunately little information is available regarding how mica affects the physico-mechanical behaviors of *** study prepares reconstituted WGS with different mica contents by removing natural mica in theWGS,and then mixes it with commercial mica *** geotechnical behavior as well as the microstructures of the mixtures are *** addition of mica enables the physical indices of WGS to be specific combinations of coarser gradation and high permeability but high Atterberg ***,high mica content in WGS was found to be associated with undesirable mechanical properties,including increased compressibility,disintegration,and swelling potential,as well as poor compactability and low effective frictional *** analysis indicates that the influence of mica on the responses of mixtures originates from the intrinsic nature of mica as well as the particle packing being formed *** exists in the mixture as stacks of plates that form a spongy structure with high compressibility and swelling *** among the plates give the soil high water retention and high Atterberg *** pores are also generated by soil particles with bridging packing,which enhances the permeability and water-soil interactions upon *** study provides a microlevel understanding of how mica dominates the behavior of WGS and provides new insights into the effective stabilization and improvement of micaceous soils.

关键词： Weathered granitic soil(WGS) Mica Microstructure Physical properties Mechanical properties Mechanism

Synthesis and molecular recognition characteristics of a tetrapodal benzene cage

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Chinese Chemical Letters 2024年第8期35卷 240-244页

作者： Caihong Mao Yanfeng He Xiaohan wang Yan Cai Xiaobo Hu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China

In this contribution,we describe the preparation and recognition characteristics of a novel tetrapodal benzene cage(1).The cage can express a wide recognition range without losing selectivity for the object of appropriate size and functional *** key to obtaining the desired structural isomer of 1 is the synthesis and isolation of the o-bis(bromomethyl)benzene precursor(5).Three distinct guests,F^(−)(ex-tremely small size),d-lactate(appropriate size)and l-Asp(branched shape),were selected as examples to demonstrate the recognition characteristics of *** NMR titration studies,they all expressed good binding affinity(K>10^(5) L/mol)in competitive medium(10%DMSO/THF),indicating that 1 has a wide recognition *** highest binding constant was observed for d-lactate,revealing that 1 has good selectivity for d-lactate versus F^(−)and ***,the NMR titration study of F^(−)in DMSO indicates 1 can achieve different binding modes(1:1 and 2:1 guest-host)for small-sized guests,which allows for the further development of binary binding properties and thereafter applications in the field of catalysis.

关键词： Cage molecules Host-guest chemistry Multi-step organic synthesis d-Lactate recognition l-Asp recognition