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S100A2、IFN-γ和Eotaxin-1在溃疡性结肠炎合并EB病毒感染中的表达及意义

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中华医院感染学杂志 2024年第2期34卷 205-209页

作者：田伟珍王立明郑丽潘文娟王丽丽丽水市人民医院消化内科浙江丽水323000

目的分析钙结合蛋白S100A2(S100A2)、γ-干扰素(IFN-γ)、嗜酸性粒细胞趋化因子-1(Eotaxin-1)在溃疡性结肠炎合并EB病毒感染中的表达及意义。方法选取2020年3月—2023年3月丽水市人民医院收治的116例溃疡性结肠炎患者作为研究对象,根据E... 详细信息

目的分析钙结合蛋白S100A2(S100A2)、γ-干扰素(IFN-γ)、嗜酸性粒细胞趋化因子-1(Eotaxin-1)在溃疡性结肠炎合并EB病毒感染中的表达及意义。方法选取2020年3月—2023年3月丽水市人民医院收治的116例溃疡性结肠炎患者作为研究对象,根据EB病毒感染情况分为未感染组51例,感染组65例,同期于医院门诊体检的47名健康志愿者作为对照组,受试者工作特征(ROC)曲线分析S100A2、IFN-γ、Eotaxin-1检测对溃疡性结肠炎合并EB病毒感染的预测价值。结果与对照组比较,未感染组和感染组S100A2、IFN-γ、Eotaxin-1表达水平升高(P<0.05),且感染组高于未感染组(P<0.05),并随着患者感染加重S100A2、IFN-γ、Eotaxin-1表达水平逐渐升高(P<0.05);ROC曲线显示,联合检测S100A2、IFN-γ、Eotaxin-1预测溃疡性结肠炎合并EB病毒感染的曲线下面积(AUC)为0.878,诊断价值较高。结论溃疡性结肠炎合并EB病毒感染患者S100A2、IFN-γ和Eotaxin-1水平升高,联合检测三指标可用于溃疡性结肠炎合并EB病毒感染的预测。

关键词：溃疡性结肠炎 EB病毒感染钙结合蛋白S100A2 γ-干扰素嗜酸性粒细胞趋化因子-1

Fe-Doped All-Boron Fullerene B40 with Tunable Electronic and Magnetic Properties as Single Molecular Devices

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Chinese Physics Letters 2019年第11期36卷 60-64页

作者： An-Zhi Xie tian-zhen Wen Ji-Ling Li School of Materials Science&Engineering Sun Yat-sen UniversityGuangzhou 510275

Systematic theoretical calculations are performed to investigate the dopant effect of Fe on stability, electronic and magnetic properties of the newly synthesized all-boron fullerene B40. The results reveal that as a typical ferromagnetic element, Fe atoms can either be chemically externally adsorbed on, or internally encapsulated in the cage of B40, with the binding energies ranging from 3.07 to 5.31 eV/atom. By introducing the dopant states from the doped Fe atom, the energy gaps of the Fe-doped B40-based metallofullerenes are decreased. Our spin-polarized calculations indicate that Fe-doped metallofullerenes have attractive magnetic properties: with alternative binary magnetic moments between 4.00μB and 2.00μB, depending on the resident sites of the doped Fe atom. The findings of the tunable electronic properties and binary magnetic moments of the Fe-doped B40-based metallofullerenes imply that this type of metallofullerene may be applied in single molecular devices.

关键词： attractive boron adsorbed

Ag/Mg-Al-O Composite for Low Temperature NO_x Storage

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Chemical Research in Chinese Universities 2011年第5期27卷 734-738页

作者： WANG tian-you LU zhen YANG Sheng-hua SUN Kai State Key Laboratory of Engines School of Mechanical Engeering Tianjin University Tianjin 300072 1~ R. China

Ag/Mg-Al-O composite was prepared by the calcination of Ag-containing Mg-Al hydrotalcite-like compound and metallic Ag supported on periclase phase Mg-Al-O was obtained. The as-prepared Ag/Mg-Al-O composite exhibits good NOx storage capability in a relatively low temperature range of 150―300 °C. The highest NOx storage capability of 7.3 mg/g was achieved at 150 °C, while a lower NOx storage capability of 5.1 mg/g was achieved at 300 °C. Meanwhile, ca. 25% of NOx was observed to decompose to N2 at 300 °C. In situ FTIR results suggest that NOx mainly stored in Ag/Mg-Al-O catalyst in the form of bridging nitrites located on periclase phase Mg-Al-O.

关键词： Ag/Mg-Al-O NOx storage Decomposition Bridging nitrite

Preliminary calibration results for Jason-3 and Sentinel-3 altimeters in the Wanshan Islands

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Journal of Oceanology and Limnology 2021年第2期39卷 458-471页

作者： Wanlin ZHAI Jianhua ZHU Xiaohui FAN Longhao YAN Chuntao CHEN zhen tian National Ocean Technology Center Tianjin 300112China tianjin Guohai Marine Engineering Survey Co.Ltd. Tianjin 300000China

We present preliminary calibration results for Jason-3 and Sentinel-3A altimeters that we set up in the Wanshan Islands in Guandong Province,*** campaigns were carried out in 2018,from March 8 to April 16 and from November 3 to December 11,*** GPS reference stations and tide gauges were established on the islands of Zhiwan,Dangan,and Wailingding during the *** in-situ sea surface height(SSH)of the altimeter footprint was determined using the tide *** tidal and geoid connection between the tide gauge locations and the altimeter footprints were computed with the NAO.99Jb tidal prediction system and the EGM 2008 geoid,*** data of the tide gauges were defi ned using the GPS buoy and GPS reference stations during the *** results show that the waveform of the altimeters was slightly contaminated by the small *** bias associated with Jason-3 and Sentinel-3A amounted to approximately+20.7±49.7 mm and+30.1±39.4 mm,respectively,which agreed well with the results from other in-situ calibration fi *** indicates that the Wanshan area was very suitable as an in-situ calibration/validation fi *** wet zenith delay(WZD)determined from the Microwave Radiometer(MWR)and the GPS measurements diff ered from each other for the Jason-3 and Sentinel-3A by−6.6±7.4 mm and 0±6.8 mm,respectively.

关键词： altimeter calibration tide gauge GPS buoy wet zenith delay

A Novel Self-adaptive Circuit Design Technique Based on Evolvable Hardware

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International Journal of Automation and computing 2020年第5期17卷 744-751页

作者： Jun-Bin Zhang Jin-Yan Cai Ya-Feng Meng tian-zhen Meng Department of Electronic and Optical Engineering Mechanical Engineering CollegeShijiazhuang 050003China

Since traditional fault tolerance methods of electronic systems are based on redundant fault tolerance technique,and their structures are fixed when circuits are designed,the self-adaptive ability is *** order to solve these problems,a novel circuit self-adaptive design technique based on evolvable hardware(EHW)is *** features robustness,self-organization and *** can be adapted to a complex environment through dynamic configuration of the *** this paper,the proposed technique *** consumption of hardware resources and the number of convergence iterations *** effectiveness and superiority of the proposed technique are *** designed circuit has the ability of resistible redundant-state interference(RRSI).The proposed technique has a broad application prospect,and it has great significance.

关键词： Circuit design self-adaptive design redundant fault tolerance technique evolvable hardware(EHW) evolutionary algorithms(EA)

南京某高校学生宿舍空气污染物浓度及室内外差异特征研究

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环境科技 2024年第3期37卷 64-69,75页

作者：张添桢陈培林王勤耕南京大学环境学院污染控制与资源化研究国家重点实验室江苏南京210023 江苏省大气环境与装备技术协同创新中心江苏南京210044

以南京某高校典型大学生宿舍为研究对象,通过对宿舍内外4种主要污染物(CH_(2)O,O_(3),PM_(2.5)和PM_(10))在不同季节和通风情景下的同步监测,评估室内空气质量状况并分析不同污染物时间变化特征和室内外差异及两者影响因素。结果显示,CH... 详细信息

以南京某高校典型大学生宿舍为研究对象,通过对宿舍内外4种主要污染物(CH_(2)O,O_(3),PM_(2.5)和PM_(10))在不同季节和通风情景下的同步监测,评估室内空气质量状况并分析不同污染物时间变化特征和室内外差异及两者影响因素。结果显示,CH_(2)O浓度明显超标,最大小时浓度超标1.6倍。夏季CH_(2)O和O_(3)的浓度明显高于冬季,PM_(10)和PM_(2.5)浓度差异则相反。室内CH_(2)O浓度显著高于室外,O_(3)浓度低于室外,表明CH_(2)O主要由室内产生,O_(3)主要来源室外。室内外颗粒物浓度相差较小,同时受到室内外来源影响。开窗通风可显著降低室内CH_(2)O浓度,但可能导致O_(3)浓度升高,对颗粒物的影响则与室内外来源相对强弱有关。

关键词：室内空气污染甲醛臭氧颗粒物

改良QuEChERS结合GC-MS/MS测定红花注射液中28种农药残留

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甘肃科技 2024年第4期40卷 77-83页

作者：王行智张文陈婷白雪田振兰州市食品药品检验检测研究院甘肃兰州730050

文章构建了一种改良的QuEChERS结合气相色谱三重四级杆质谱(GC-MS/MS)同时测定红花注射液中农药残留检测的方法,可同时检测28种常见农药;样品经过乙酸乙酯提取,采用PSA、C18、MgSO4净化剂组合净化,基质外标法定量,GC-MS/MS分离分析;28... 详细信息

文章构建了一种改良的QuEChERS结合气相色谱三重四级杆质谱(GC-MS/MS)同时测定红花注射液中农药残留检测的方法,可同时检测28种常见农药;样品经过乙酸乙酯提取,采用PSA、C18、MgSO4净化剂组合净化,基质外标法定量,GC-MS/MS分离分析;28种农药在0~500μg/L范围内线性相关系数均大于0.99,检出限为0.2812~6.095μg/kg,定量限为2.423~13.71μg/kg;在0.2 mg/kg、0.5 mg/kg、1.0 mg/kg 3个梯度各元素加标回收率为82.41%~127.2%,RSD值为0.016%~8.9%(n=6)。这种简单、高效、省时、高灵敏度的分析方法可以用于红花注射液中多种农药残留测定。

关键词：气质联用红花注射液农药残留 QuEChERS

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小兴安岭阔叶红松林次生演替不同阶段空间结构特征研究

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西南林业大学学报（自然科学） 2024年第3期44卷 130-137页

作者：田珍王亚飞段文标王郅臻杨文陈立新东北林业大学林学院黑龙江哈尔滨150040

选取小兴安岭凉水自然保护区内阔叶红松林次生演替序列中的天然枫桦次生林、次生阔叶林、次生针阔混交林以及原始阔叶红松林为研究对象,采用空间结构参数(角尺度、大小比数、混交度)的一元和二元分布,分析林木的空间结构特征。结果表明... 详细信息

选取小兴安岭凉水自然保护区内阔叶红松林次生演替序列中的天然枫桦次生林、次生阔叶林、次生针阔混交林以及原始阔叶红松林为研究对象,采用空间结构参数(角尺度、大小比数、混交度)的一元和二元分布,分析林木的空间结构特征。结果表明:一元二元分布中,林分角尺度均呈现相对正态分布,在W=0.5时频率最高,4个阶段的平均角尺度分别为0.577、0.557、0.634、0.589,均以轻度聚集分布为主;并随着演替进行,聚集趋势上升,到原始阔叶红松林后聚集程度又下降;4个演替阶段林木之间呈现混交状态为极强混交,强度和极强度混交的比例依次为69.94%、70.08%、65.56%、63.64%,混交林木的比例随着演替序列呈现先上升后下降的趋势。从不同演替阶段的优势种空间分布来看,前5位优势树种呈集聚分布,树种混交程度都较高,但阳性先锋树种和耐阴树种林木的大小分化差异较大。可见,阔叶红松林4个演替阶段的变化说明演替前期林木的角尺度和混交度较大,后期尤其是原始阔叶红松林中聚集程度降低,随机分布比例上升,有利于群落长久稳定发展。

关键词：红松次生林演替空间结构一元分布二元分布小兴安岭

A Review of Methods Based on Nanofluids and Biomimetic Structures for the Optimization of Heat Transfer in Electronic Devices

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1205-1227页

作者： Lanqi Chen Yuwei Wang Cong Qi Zhibo Tang zhen tian School of Low-Carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou221116China

Nowadays,the utilization rate of electronic products is increasing while showing no obvious sign of reaching a *** solve the associated“internal heat generation problem”,scientists have proposed two methods or *** first approach consists of replacing the heat exchange medium with a ***,the high surface energy of the nanoparticles makes them prone to accumulate along the heat transfer *** second method follows a different *** tries to modify the surface structure of the electronic components in order to reduce the fluid-dynamic drag and improve the rate of heat *** article reviews these effects considering different types of nanofluid and different shapes,sizes,and arrangements of“biomimetic grooves”.The idea to use these two methods in a combined fashion(to improve heat transfer and reduce flow resistance at the same time)is also developed and discussed critically to a certain extent.

关键词： Nanofluids biomimetic structure drag reduction characteristic thermal management