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Spatial construction of ultrasmall Pt-decorated 3D spinel oxidemodified N-doped graphene nanoarchitectures as high-efficiency methanol oxidation electrocatalysts

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Rare Metals 2024年第1期43卷 186-197页

作者： Qi Zhang Min-Min Yan Wen-fa.Du Chen-Yu Yin Jian Zhang Lu Yang Yun-Qing Kang Hai-Yan He Hua-Jie Huang College of Mechanics and Materials Hohai UniversityNanjing 210098China New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China International Center for Materials Nanoarchitectonics(WPIMANA) National Institute for Materials ScienceTsukuba 305-0044IbarakiJapan

Direct methanol fuel cell technology recently becomes the focus of both academic and engineering circles,which stimulates the exploitation and utilization of advanced electrode catalysts with high activity and long ***,we demonstrate a robust bottom-up approach to the spatial construction of three-dimensional(3D) spinel manganese-cobalt oxide-modified N-doped graphene nanoarchitectures decorated with ultrasmall Pt nanoparticles(Pt/MnCo_(2)O_(4)-ng) via a controllable selfa.sembly *** incorporation of MnCo_(2)O_(4)nanocrystals provides abundant hydroxyl sources to promote the oxidative removal of CO-like byproducts on Pt sites,while the existence of 3D porous N-doped graphene networks fa.ilitates the transportation of both ions and electrons in the hybrid system,thus giving rise to remarkable synergetic coupling effects during the methanol oxidation ***,the optimized Pt/MnCo_(2)O_(4)-ng nano architecture expres ses exceptional electrocatalytic properties with a large electrochemically active surfa.e area of 99.5 m^(2)·g^(-1),a high mass activity of1508.3 mA·mg^(-1),strong toxicity resistance and reliable long-term durability,which have obvious competitive advantages over those of conventional Pt/carbon black,Pt/carbon nano tube,Pt/graphene,and Pt/N-doped graphene catalysts with the same Pt usage.

关键词： Platinum MnCo_(2)O_(4) 3D graphene Electrocatalysts Methanol oxidation

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无创正压通气在重症支气管哮喘合并呼吸衰竭急诊治疗中的效果评价

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中国实用医药 2024年第8期19卷 38-41页

作者：王法辽宁省新民市人民医院 110300

目的观察无创正压通气在重症支气管哮喘合并呼吸衰竭急诊治疗中的效果。方法 62例重症支气管哮喘合并呼吸衰竭患者,遵循双盲随机分组原则分为对照组和实验组,各31例。两组患儿均给予常规治疗,对照组在常规治疗基础上采用有创正压通气治... 详细信息

目的观察无创正压通气在重症支气管哮喘合并呼吸衰竭急诊治疗中的效果。方法 62例重症支气管哮喘合并呼吸衰竭患者,遵循双盲随机分组原则分为对照组和实验组,各31例。两组患儿均给予常规治疗,对照组在常规治疗基础上采用有创正压通气治疗,实验组在常规治疗基础上采用无创正压通气治疗。比较两组患者基本生命指征、炎症指标、血气分析指标、并发症发生情况。结果治疗24 h后,实验组心率(96.65±7.14)次/min低于对照组的(112.32±7.11)次/min,收缩压(125.65±4.67)mm Hg(1 mm Hg=0.133 kPa)、舒张压(85.45±3.54)mm Hg均高于对照组的(120.54±4.69)、(73.16±3.51)mm Hg(Png/L,低于对照组的(15.24±1.47)mg/L、(148.65±24.61)pg/ml、(5.24±0.11)ng/L(P<0.05)。治疗24 h后,实验组动脉血氧分压(80.14±3.03)mm Hg、动脉血氧饱和度(94.56±1.56)%均高于对照组的(73.26±3.06)mm Hg、(87.21±1.52)%,动脉血二氧化碳分压(40.24±3.61)mm Hg低于对照组的(46.18±3.64)mm Hg(P<0.05)。治疗24 h后,实验组第1秒用力呼气容积、第1秒用力呼气容积与用力肺活量的比值、每分钟通气量分别为(1265.54±21.31)ml、(82.56±5.71)%、(7.73±0.62)L,均大于对照组的(1043.26±21.27)ml、(75.61±5.72)%、、(5.25±0.59)L(P<0.05)。实验组并发症发生率9.68%低于对照组的32.26%(P<0.05)。结论重症支气管哮喘合并呼吸衰竭患者急诊治疗中应用无创正压通气可显著提升临床效果。

关键词：无创正压通气重症支气管哮喘呼吸衰竭急诊治疗

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Candidate reference measurement procedure for serum 17-hydroxyprogesterone quantification via isotope dilution liquid chromatography–tandem mass spectrometry

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iLABMED 2024年第2期2卷 98-107页

作者： Ji Zhang Yang Jiang Ting Liu Xiongwei Liu Hui Huang Yanxiang Cheng Jieyan Li Bangning Cheng Chungen Qian Xufu Xiang Jun-fa.Xu Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics Department of Clinical ImmunologyInstitute of Laboratory MedicineSchool of Medical TechnologyGuangdong Medical UniversityDongguanGuangdongChina Shenzhen YHLO Biotech Co. Ltd.ShenzhenGuangdongChina Shenzhen Longgang Central Hospital Clinical Laboratory ShenzhenGuangdongChina The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics and Molecular Imaging Key Laboratory Systems Biology ThemeDepartment of Biomedical EngineeringCollege of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina

Background:Accurate quantification of 17-hydroxyprogesterone(17-OHP)in serum is vital for clinical and research ***,inter-laboratory variability in test results exists owing to the lack of a standardized reference measurement procedure(RMP).Therefore,in this study,we developed a highly accurate,cost-effective,and user-friendly candidate RMP(cRMP)for analyzing 17-OHP in ***:We quantified 17-OHP in serum using a one-step liquid–liquid extraction method with the addition of 17-OHP-^(13)C_(3),followed by liquid chromatography–tandem mass *** ability of these methods to suppress interference was evaluated by chromatographic *** assessed accuracy,specificity,the lower limit of quantitation,linearity,and matrix effects by following the standards specified by the Clinical and Laboratory Standards *** consistency between the developed cRMP and the chemiluminescence method was evaluated through experiments with 120 clinical ***:The developed cRMP required only 8 min for accurate quantification of serum 17-OHP without bias from matrix effects or interference from 19 metabolites added as potential *** method exhibited fa.orable measurement performance,with a quantitation limit of 0.086 ng/mL,linear range of 0.1–400 ng/mL,a total imprecision of≤2.90%,spike recovery of 100.1%–100.6%,and relative deviations from assigned target values(RfB Institution)of−2.91%to 1.10%.The cRMP demonstrated good consistency with the conventional assay(chemiluminescence method),with a correlation coefficient R of ***:A cRMP with high accuracy,cost-effectiveness,and convenient operation was developed for quantifying 17-OHP in *** simplicity and robust performance make it an invaluable addition to the arsenal of analytical tools available for *** method can enhance the accuracy and reliability of 17-OHP measurements across various laboratories.

关键词： 17-hydroxyprogesterone isotope dilution liquid chromatography-tandem mass spectrometry reference measurement procedure serum

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电喷雾萃取电离-串联质谱法测定不同水样中全氟辛酸

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质谱学报 2024年第4期45卷 492-499,I0002页

作者：幸慧玉陈兰芳占发旺方小伟陈焕文江西中医药大学生命样品直接质谱分析研究室江西南昌330004 南昌大学第一附属医院江西南昌330006 江西万拓环境检测有限公司江西上饶334400

全氟辛酸(PFOA)是一种持久性有机污染物,长期环境暴露会对生态系统与人类健康造成极大的风险,因此,发展快速定量监测水中PFOA的方法至关重要。本研究采用电喷雾萃取电离-串联质谱(EESI-MS/MS)法检测自来水、江水、河水中的痕量PFOA。结... 详细信息

全氟辛酸(PFOA)是一种持久性有机污染物,长期环境暴露会对生态系统与人类健康造成极大的风险,因此,发展快速定量监测水中PFOA的方法至关重要。本研究采用电喷雾萃取电离-串联质谱(EESI-MS/MS)法检测自来水、江水、河水中的痕量PFOA。结果表明,在优化的实验条件下,PFOA在1~500 ng/L浓度范围内的线性关系良好,线性相关系数(R^(2))为0.997 6,方法检出限(LOD)为0.57 ng/L,定量限(LOQ)为1.73 ng/L,回收率为92.1%~105.2%,相对标准偏差(RSD,n=6)为1.89%~5.45%。本方法具有灵敏度高、准确性好、分析速度快等优点,在监测环境水体污染物方面具有良好的应用前景。

关键词：电喷雾萃取电离-串联质谱(EESI-MS/MS) 快速检测全氟辛酸(PFOA) 水

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Application of an amphipathic molecule at the NiO_(x)/perovskite interfa.e for improving the efficiency and long-term stability of the inverted perovskite solar cells

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Journal of Energy Chemistry 2023年第3期78卷 454-462,I0013页

作者： Guibin Shen Hongye Dong fa. Yang Xin Ren ng Xin Li Fen Lin Cheng Mu Key Laboratory of Advanced Light Conversion Materials and Biophotonics Department of ChemistryRenmin University of ChinaBeijing 100872China Solar Energy Research Institute of Singapore(SERIS) National University of SingaporeSingapore 117574Singapore State Key Laboratory of Materials Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117574Singapore

The presence of defects and detrimental reactions at NiO_(x)/perovskite interfa.e extremely limit the efficiency performance and long-term stability of the perovskite solar cells(PSCs) based on NiO_(x).Herein,an amphipathic molecule Triton X100(Triton) is modified on the NiO_(x)*** hydrophilic chain of Triton as a Lewis base additive can coordinate with the Ni3+on the NiO_(x)surfa.e which can passivate the interfa.ial defects and hinder the detrimental reactions at the NiO_(x)/perovskite ***,the hydrophobic chain of Triton protrudes from the NiO_(x)surfa.e to prevent moisture from penetrating into the NiO_(x)/perovskite ***,the NiO_(x)/Triton-based devices(MAPbI3as absorbing layer) show superior moisture and thermal stability,retaining 88.4% and 64.3% of the initial power conversion efficiency after storage in air(40%-50% relative humidity(RH)) at 25 ℃ for 1070 h and in N2at 85℃ for 800 h,***,the efficiency increases from 17.59% to 19.89% because of the passivation defect and enhanced hole-extraction ***,the NiO_(x)/Triton-based PSCs with Cs_(0.05)(MA_(0.15)fa.(0.85))_(0.95)Pb(I_(0.85)Br_(0.15))3perovskite as the light-absorbing layer also exhibits better moisture and thermal stability compared to the control devices,indicating the viability of our *** particular note,a champion PCE of 22.35% and 20.46% was achieved for small-area(0.1 cm^(2)) and large-area(1.2 cm^(2)) NiO_(x)/Triton-based devices,respectively.

关键词： Perovskite solar cells NiO_(x) Defect passivation Long-term stability Amphipathic molecule

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超高效液相色谱-串联质谱测定污水中依托咪酯

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中国给水排水 2024年第4期40卷 132-136页

作者：陈顺琴高焕朱发泽陈月猛刘杉丁文波刘玉波贵州医科大学法医学院贵州贵阳550004 贵阳市公安局毒品检验中心贵州贵阳550018 贵州万孚先义检测技术有限公司贵州贵阳550009

基于超高效液相色谱-串联质谱(UPLC-MS/MS)技术首次建立了污水中依托咪酯的分析检测方法,样品经在线固相萃取(On-line SPE)系统,以HLB Direct Connect HP固相萃取小柱(2.1 mm×30 mm,20μm)对目标化合物进行萃取后,采用乙腈-2 mmol/L甲... 详细信息

基于超高效液相色谱-串联质谱(UPLC-MS/MS)技术首次建立了污水中依托咪酯的分析检测方法,样品经在线固相萃取(On-line SPE)系统,以HLB Direct Connect HP固相萃取小柱(2.1 mm×30 mm,20μm)对目标化合物进行萃取后,采用乙腈-2 mmol/L甲酸铵和0.1%甲酸水溶液为流动相进行梯度洗脱,再将目标物反向加载至Kinetex Biphenyl色谱柱(3.0 mm×100 mm,2.6μm),采用电喷雾正离子(ESI+)、多反应监测(MRM)模式分析检测。结果显示,依托咪酯在1~300 ng/L范围内线性关系良好,R2为0.999 7,方法检出限(LOD)为0.3 ng/L,定量限(LOQ)为1.0 ng/L。应用该方法对遵义地区17座污水处理厂进水口处依托咪酯的浓度进行检测,进一步验证了该方法的可靠性。污水样品中依托咪酯的检出率较低,其原因可能是依托咪酯经体内代谢后主要以依托咪酯酸的形式存在,检测结果与实际情况相符。依托咪酯于2023年10月1日起被纳入第二类精神药品列管目录,该方法的建立对依托咪酯的分析提供了技术参考。

关键词：超高效液相色谱-串联质谱(UPLC-MS/MS) 依托咪酯污水

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Porous covalent organic frameworks-improved solid phase microextraction ambient mass spectrometry for ultrasensitive analysis of tetrabromobisphenol-A analogs

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Chinese Chemical Letters 2022年第8期33卷 3849-3852页

作者： Wei Gao Min Li Yun fa.Zongshan Zhao Yaqi Cai Xiangfeng Liang Yongliang Yu Guibin Jiang Research Center for Analytical Sciences Department of ChemistryCollege of SciencesNortheastern UniversityShenyang 110819China CAS Key Laboratory of Biobased Materials Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China College of Environmental Science and Engineering Qingdao UniversityQingdao 266071China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Innovation Academy for Green Manufa.ture Chinese Academy of SciencesBeijing 100190China

Owing to frequent environmental monitoring of tetrabromobisphenol-A(TBBPA)analogs and their potential ecotoxicological effects on organisms,analysis of trace levels of TBBPA analogs with more non-polar and less water-soluble characteristics is of great significance for studying their environmental behaviors and toxic ***,a fa.t and sensitive technique is developed for directly detecting aqueous TBBPA analogs,including TBBPA mono(allyl ether)(TBBPA-MAE),TBBPA mono(2,3-dibromopropyl ether)(TBBPAMDBPE),TBBPA mono(2-hydroxyethyl ether)(TBBPA-MHEE)and TBBPA mono(glycidyl ether)(TBBPAMGE),by combining solid phase microextraction(SPME)based on porous covalent organic frameworks(Porous-COFs)with constant flow desorption ionization-mass spectrometry(CFDI-MS).As chromatographic separation is replaced by constant flow desorption,each sample can be analyzed within 7 *** hierarchical porous structures(microporous,mesoporous and macroporous)of COFs lead to the enhanced mass transfer and the easier accessibility of active sites to TBBPA analogs,so that the extraction efficiency is 2.3-3.6 times higher than pure microporous COFs,and fa. superior to commercial *** detection limit and quantification limit of this method are 0.1-1 and 0.4-3.2 ng/L,*** levels of TBBPA analogs from 5.0 ng/L to 66 ng/L have been successfully detected in river and sea water samples,showing great potential for subsequent studies of their environmental behaviors and toxicological effects.

关键词： Environmental analysis Covalent organic frameworks Solid phase microextraction Ambient mass spectrometry TBBPA analogs

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室内TSP态甲基苯丙胺的来源特征研究

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中国药物依赖性杂志 2024年第3期33卷 215-221页

作者：刘昕范贤谋牛德云杨发震刘美王诠毒品分析及禁毒技术公安部重点实验室昆明650223 昆明市公安局司法鉴定中心昆明650500

目的以甲基苯丙胺为例,探究空气中精神药物的来源特征和污染特征。方法通过室内模拟甲基苯丙胺的燃吸(烫吸)过程和实验室模拟毒品制造的开包、封包、浓缩、稀释等过程,产生总悬浮颗粒物(total suspended particulate,TSP),用截停滤膜采... 详细信息

目的以甲基苯丙胺为例,探究空气中精神药物的来源特征和污染特征。方法通过室内模拟甲基苯丙胺的燃吸(烫吸)过程和实验室模拟毒品制造的开包、封包、浓缩、稀释等过程,产生总悬浮颗粒物(total suspended particulate,TSP),用截停滤膜采集TSP,探究TSP中甲基苯丙胺及其共存标记物的萃取和检测技术,初步阐明TSP中典型精神药物的来源和污染特征。结果实验条件下,模拟燃吸场所TSP态甲基苯丙胺的含量为3.938~33.987μg/m^(3),空闲时间毒品实验室内的甲基苯丙胺含量仅为3.476 ng/m^(3)。空闲时间实验室的TSP中无尼古丁、咖啡因等共存标记物。结论本研究提出了空气中TSP态甲基苯丙胺的滤膜采集+有机相(水相)萃取+GC-MS、UPLC-PDA、UPLC-MS/MS检测技术,咖啡因和尼古丁是麻古燃吸的共存标记物,尼古丁是冰毒烟丝燃吸共存标记物。

关键词：总悬浮颗粒物甲基苯丙胺气相色谱—质谱超高效液相—质谱标记物

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QuEChERS净化-高效液相色谱-串联质谱法测定红枣中5种植物生长调节剂

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安徽农业科学 2024年第14期52卷 165-168,210页

作者：鲁立良陈永发张金磊罗瑞峰刘长勇新疆农垦科学院/农业农村部食品质量检验测试中心(石河子) 新疆石河子832000

[目的]建立1%甲酸-乙腈提取结合QuEChERS净化,高效液相色谱-串联质谱法同时测定红枣中5种植物生长调节剂的方法。[方法]比较不同提取试剂、净化材料等对提取净化效果的影响。在ESI源正/负离子模式下,多反应监测(MRM)模式采集数据,进行... 详细信息

[目的]建立1%甲酸-乙腈提取结合QuEChERS净化,高效液相色谱-串联质谱法同时测定红枣中5种植物生长调节剂的方法。[方法]比较不同提取试剂、净化材料等对提取净化效果的影响。在ESI源正/负离子模式下,多反应监测(MRM)模式采集数据,进行定性和定量分析。[结果]5种植物生长调节剂在1~50 ng/mL质量浓度范围内线性关系良好(R 2>0.999),方法检出限和定量限分别为0.1~0.2和0.3~0.6μg/kg。空白红枣3个不同的添加水平回收率为82.5%~106.1%,相对标准偏差(RSD)为1.0%~8.4%。通过对市售红枣样品检测,能够准确测定红枣中植物生长调节剂水平。[结论]该方法简单、快速、准确可靠,适用于红枣中5种植物生长调节剂的快速测定。

关键词：红枣植物生长调节剂高效液相色谱-串联质谱法 QuEChERS

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Ethyl Lithospermate Reduces Lipopolysaccharide-Induced Inflammation through Inhibiting NF-κB and STAT3 Pathways in RAW 264.7 Cells and Zebrafish

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Chinese Journal of Integrative Medicine 2023年第12期29卷 1111-1120页

作者： ZHOU Chun-hong YAng Hua ZOU Li-fa.g LIU Di-fa.YU Lin-zhong CAO Hui-hui DEng Li-e WAng Zhang-wei LU Zi-bin LIU Jun-shan Third Level Research Laboratory of State Administration of Traditional Chinese Medicine Guangdong Provincial Key Laboratory of Chinese Medicine PharmaceuticsSchool of Traditional Chinese MedicineSouthern Medical UniversityGuangzhou(510515)China Department of Pharmacy Zhujiang HospitalSouthern Medical UniversityGuangzhou(510282)China State Key Laboratory of Innovative Natural Medicine and Traditional Chinese Medicine Injections Jiangxi Qingfeng Pharmaceutical Co.Ltd.GanzhouJiangxi Province(341000)China Affiliated Dongguan People's Hospital Southern Medical UniversityDongguanGuangdong Province(523076)China

Objective:To explore the anti-inflammatory effects of ethyl lithospermate in lipopolysaccharide(LPS)-stimulated RAW 264.7 murine-derived macrophages and zebrafish,and its underlying ***:3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazoliumbromide(MTT)assays were performed to investigate the toxicity of ethyl lithospermate at different concentrations(12.5–100μmol/L)in RAW 264.7 *** cells were stimulated with LPS(100 ng/mL)for 12 h to establish an inflammation model in vitro,the production of proinflammatory cytokines interleukin(IL)-6 and tumor necrosis fa.torα(TNF-α)were assessed by enzyme linked immunosorbent assay(ELISA).Western blot was used to ascertain the protein expressions of signal transducer and activator of transcription 3(STAT3),nuclear fa.tor kappa B(NF-κB)p65,phospho-STAT3(p-STAT3,Tyr705),inhibitor of NF-κB(IκB)α,and phospho-IκBα(p-IκBα,Ser32),and confocal imaging was used to identify the nuclear translocation of NF-κB p65 and p-STAT3(Tyr705).Additionally,the yolk sacs of zebrafish(3 days post fertilization)were injected with 2 nL LPS(0.5 mg/mL)to induce an inflammation model in *** analysis,hematoxylin-eosin(HE)staining,observation of neutrophil migration,and quantitative real-time polymerase chain reaction(qR T-PCR)were used to further study the anti-inflammatory effects of ethyl lithospermate and its probable mechanisms in ***:The non-toxic concentrations of ethyl lithospermate have been found to range from 12.5 to 100μmol/*** lithospermate inhibited the release of IL-6 and TNF-α(Png the survival rate of LPS-stimulated zebrafish(P<0.05 or P<0.01).In addition,ethyl lithospermate also inhibited the mR NA expression levels of of IL

关键词： ethyl lithospermate anti-inflammation nuclear fa.tor kappa B signal transducer and activator of transcription 3 lipopolysaccharide zebrafish

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