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Variable valence Mo^(5+)/Mo^(6+)ionic bridge in hollow spherical g-C_(3)N_(4)/Bi_(2)MoO_(6) catalysts for promoting selective visible light-driven CO_(2)photoreduction into CO

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Journal of Energy Chemistry 2023年第5期80卷 361-372,I0009页

作者： Wenjie He Yuechang Wei jing Xiong Zhiling Tang Yingli Wang Xiong Wang Hui Xu xiao Zhang xiaolin Yu Zhen Zhao Jian Liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBejing 102249China Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of ChemistryChinese Academy of SciencesBeijing 100190China

Herein,the catalysts of ultrathin g-C_(3)N_(4)surface-modified hollow spherical Bi2MoO6(g-C_(3)N_(4)/Bi2MoO6,abbreviated as CN/BMO)were fabricated by the co-solvothermal *** variable valence Mo^(5+)/Mo^(6+)ionic bridge in CN/BMO catalysts can boost the rapid transfer of photogenerated electrons from Bi2MoO6to g-C_(3)N_(4).And the synergy effect of g-C_(3)N_(4)and Bi2MoO6components remarkably enhance CO_(2)adsorption ***/BMO-2 catalyst has the best performances for visible light-driven CO_(2)reduction compared with single Bi2MoO6and g-C_(3)N_(4),i.e.,its amount and selectivity of CO product are 139.50μmol g-1and 96.88%for 9 h,*** on the results of characterizations and density functional theory calculation,the photocatalytic mechanism for CO_(2)reduction is *** high-efficient separation efficiency of photogenerated electron-hole pairs,induced by variable valence Mo^(5+)/Mo^(6+)ionic bridge,can boost the rate-limiting steps(COOH*-to-CO*and CO*desorption)of selective visible light-driven CO_(2)conversion into *** inspires the establishment of efficient photocatalysts for CO_(2)conversion.

关键词： g-C_(3)N_(4) Bi_(2)MoO_(6) Mo^(5+)/Mo^(6+)ionic bridge CO_(2)photoconversion CO production

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Elimination of ceftiofur hydrochloride residue in postpartum cows' milk after intramammary infusing at dry-off

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Journal of Integrative Agriculture 2018年第6期17卷 1234-1240页

作者： kang Ji-jun LIU Yi-ming ZHAO Lei-lei XU Fei CHEN xiao-jie YAN Xing LI Xiu-bo Feed Research Institute Chinese Academy of Agricultural Sciences

The purpose of this study was to investigate the residue elimination of ceftiofur hydrochloride in milk of postpartum cows after intramammary infusing at dry-off. An ultra-high performance liquid chromatography-tandem mass spectrometry （UPLC-MS/ MS） method was developed and validated to detect ceftiofur hydrochloride residue in milk. Through preprocessing, ceftiofur hydrochloride was derivatized into a more stable compound dedfuroyl ceftiofur acetamide （DCA） for further analysis. The linear range of DCA was 0.1 to 50 μg kg-1. Average recoveries of DCA were 82.52-105.86％. The intra-day and interday coefficients of variation （CV） were 2.95-9.82 and 6.41-7.43％, respectively. The limit of detection （LOD） and limit of quantitation （LOQ） scores were 0.05 and 0.1 μg kg-1, respectively. These parameters showed this method was reliable and valid. Twelve cows were administrated 10 mL ceftiofur hydrochloride by intramammary infusion （corresponding to 500 mg ceftiofur） to each udder after the last milking before the dry-off period. Milk was collected from each udder of cow at 12, 24, 36, 48, 60 and 72 h after calving and was mixed for each time point and each cow, then subjected to UPLC-MS/MS analysis. The results showed, the DCA concentrations in all milk samples were less than LOQ and the maximum residue limit （MRL） 100 μg kg-1, which suggested the withdrawal time of ceftiofur hydrochloride intramammary infusion used for preventing and curing mastitis in dry cows was 0 day. The study provided guidance for the clinical applications of ceftiofur hydrochloride intramammary infusion （dry cow）.

关键词： ceftiofur hydrochloride intramammary infusing dry cows milk residue

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强直性脊柱炎椎骨去松质骨化截骨术后钛棒有限元分析

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解剖学报 2024年第3期55卷 339-344页

作者：苏宝科王永清康志杰王海燕金凤李筱贺曹振华霍佳萱祝勇李峰内蒙古自治区中医医院(内蒙古医科大学中医附属医院)急诊科呼和浩特010000 内蒙古医科大学研究生院呼和浩特010000 内蒙古医科大学基础医学院人体解剖学教研室呼和浩特010000 内蒙古医科大学附属医院影像科呼和浩特010000 锦州医科大学第三附属院骨科辽宁锦州121000 内蒙古医科大学第二附属医院脊柱外科呼和浩特010000 中国人民解放军总医院脊柱外科北京100000 内蒙古医科大学第一临床医学院呼和浩特010000 北京大学肿瘤医院内蒙古医院(内蒙古医科大学附属肿瘤医院) 内蒙古癌症中心呼和浩特010000

目的通过对去松质骨化(VCD)截骨术后强直性脊柱炎患者胸椎(T)_(11)~骶骨(S)节段钛棒应力变化分析,为术前钛棒选择、改进提供参考。方法将VCD截骨术后强直性脊柱炎患者连续扫描的断层影像原始数据以DICOM格式导入Mimics 21.0软件,分别重... 详细信息

目的通过对去松质骨化(VCD)截骨术后强直性脊柱炎患者胸椎(T)_(11)~骶骨(S)节段钛棒应力变化分析,为术前钛棒选择、改进提供参考。方法将VCD截骨术后强直性脊柱炎患者连续扫描的断层影像原始数据以DICOM格式导入Mimics 21.0软件,分别重建T_(11)~S、螺钉和钛棒,导入到3-Matic建立初步几何模型,进行去噪、铺面、平滑等处理,完善后的模型导入Hypermesh10软件进行网格划分,对材料进行属性赋值后导入ANSYS 19.2中显示有限元模型,设定边界和载荷条件,测量螺钉与钛棒连接处应力值。结果在中立位、前屈、侧向弯曲、轴向旋转工况下,钛棒在上端椎(T_(11))应力最大,顶椎(L_(3))应力最小;在后伸工况下,钛棒在下端椎(L_(5))应力最大。结论在上、下端椎可考虑增粗钛棒直径,增强钛棒硬度,或改为双棒。

关键词：强直性脊柱炎螺钉钛棒矫形后有限元分析人

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Gabor-CNN for object detection based on small samples

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Defence Technology（防务技术） 2020年第6期16卷 1116-1129页

作者： xiao-dong Hu Xin-qing Wang Fan-jie Meng Xia Hua Yu-ji Yan Yu-yang Li jing Huang Xun-lin Jiang Department of Engineering Technology and Application Army Infantry College of PLANanchang 330100China College of Field Engineering Army Engineering University of PLANanjing 210007China

Object detection models based on convolutional neural networks(CNN)have achieved state-of-the-art performance by heavily rely on large-scale training *** are insufficient when used in specific applications,such as the detection of military objects,as in these instances,a large number of samples is hard to *** order to solve this problem,this paper proposes the use of Gabor-CNN for object detection based on a small number of *** of all,a feature extraction convolution kernel library composed of multi-shape Gabor and color Gabor is constructed,and the optimal Gabor convolution kernel group is obtained by means of training and screening,which is convolved with the input image to obtain feature information of objects with strong auxiliary ***,the k-means clustering algorithm is adopted to construct several different sizes of anchor boxes,which improves the quality of the regional *** call this regional proposal process the Gabor-assisted Region Proposal Network(Gabor-assisted RPN).Finally,the Deeply-Utilized Feature Pyramid Network(DU-FPN)method is proposed to strengthen the feature expression of objects in the image.A bottom-up and a topdown feature pyramid is constructed in ResNet-50 and feature information of objects is deeply utilized through the transverse connection and integration of features at various *** results show that the method proposed in this paper achieves better results than the state-of-art contrast models on data sets with small samples in terms of accuracy and recall rate,and thus has a strong application prospect.

关键词： Deep learning Convolutional neural network Small samples Gabor convolution kernel Feature pyramid

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China-Canada Project Teaches Wuyi Women Tailoring

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Women of China 1994年第12期 21-23页

作者： xiao jing

HOT as it was, He Suhua was exceptionally happy at the opening ceremony of the Seventh Dress-making Training Class in Wuyi County, as part of the China Canada Women in Development Project. He, a head of women at Huaifu Village, dressed in clothes made by a woman who had studied in the third dress-making training class, led 11 new trainees to the county

关键词： Project China-Canada Project Teaches Wuyi Women Tailoring

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Growth differentiation factor 15 predicts cardiovascular events in stable coronary artery disease

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Journal of Geriatric Cardiology 2023年第7期20卷 527-537页

作者： Juan WANG Li-Na HAN Dao-Sheng AI Xin-Yu WANG Wan-jing ZHANG xiao-Rong XU Hong-Bin LIU jing ZHANG Pan WANG Xu LI Mu-Lei CHEN Heart Center of Beijing Chao-Yang Hospital Capital Medical UniversityBeijing Key Laboratory of HypertensionBeijingChina Department of Cardiology the Second Medical CenterNational Clinical Research Center for Geriatric DiseasesChinese PLA General HospitalBeijingChina Academy for Advanced Interdisciplinary Studies Peking University National Institute of Biological SciencesZhongguancun Life Science ParkTsinghua UniversityBeijingChina

BACKGROUND Growth differentiation factor 15(GDF-15)has been explored as a potential biomarker for various inflammatory diseases and cardiovascular *** study aimed to assess the predictive role of GDF-15 levels in cardiovascular events and all-cause mortality,considering traditional risk factors and other *** A prospective study was conducted and 3699 patients with stable coronary artery disease(CAD)were enrolled into the *** GDF-15 levels were *** follow-up was 3.1 years during the *** analyzed clinical variables and several *** Cox regression analysis was performed to evaluate prognostic performance of GDF-15 levels in predicting myocardial infarction(MI),heart failure,stroke,cardiovascular death,and non-cardiovascular *** Baseline GDF-15 levels for 3699 patients were grouped by quartile(≤1153,1153-1888,1888-3043,>3043 ng/L).Higher GDF-15 levels were associated with older age,male gender,history of hypertension,and elevated levels of N-terminal pro Btype natriuretic peptide(NT-pro BNP),soluble suppression of tumorigenesis-2(sST2),and creatine(each with P<0.001).Adjusting for established risk factors and biomarkers in Cox proportional hazards models,a 1 standard deviation(SD)increase in GDF-15 was associated with elevated risk of clinical events[hazard ratio(HR)=2.18,95%confidence interval(CI):(1.52-3.11)],including:MI[HR=2.8395%CI:(1.03-7.74)],heart failure[HR=2.7195%CI:(1.18-6.23)],cardiovascular and non-cardiovascular death[HR=2.48,95%CI(1.49-4.11)]during the median follow up of 3.1 *** Higher levels of GDF-15 consistently provides prognostic information for cardiovascular events and all cause death,independent of clinical risk factors and other ***-15 could be considered as a valuable addition to future risk prediction model in secondary prevention for predicting clinical events in patient with stable CAD.

关键词： cardiovascular elevated coronary

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Hollow Carbon Microspheres/MnO_2 Nanosheets Composites:Hydrothermal Synthesis and Electrochemical Behaviors

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Nano-Micro Letters 2015年第1期7卷 59-67页

作者： Hui-li Fan Fen Ran Xuan-xuan Zhang Hai-ming Song xiao-qin Niu Ling-bin Kong Long kang School of Materials Science and Engineering Lanzhou University of Technology State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology

This article reported the electrochemical behaviors of a novel hollow carbon microspheres/manganese dioxide nanosheets(micro-HC/nano-MnO2) composite prepared by an in situ self-limiting deposition method under hydrothermal condition. The results of scanning electron microscopy reveal that MnO2 nanosheets homogeneously grow onto the surface of micro-HC to form a loose-packed microstructure. The quantity of MnO2 required in the electrode layer has thereby been reduced significantly, and higher specific capacitances have been achieved. The micro-HC/nano-MnO2 electrode presents a high capacitance of 239.0 F g-1 at a current density of 5 m A cm-2, which is a strong promise for high-rate electrochemical capacitive energy storage applications.

关键词： Manganese oxide Hollow carbon microspheres Composite electrode Supercapacitor

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Numerical simulation of flow field characteristics and the improvement of pressure oscillation of rotating detonation engine

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Defence Technology（防务技术） 2023年第8期26卷 191-202页

作者： Xin-pei Han Quan Zheng Bao-xing Li Qiang xiao Han Xu Fang Wang Hao-long Meng Wen-kang Feng Chun-sheng Weng National Key Laboratory of Transient Physics Nanjing University of Science and TechnologyNanjing210094China Xi'an Modern Chemistry Research Institute Xi'an710065China

Due to the inherent working mode of rotating detonation engine(RDE),the detonation flow field has the characteristics of pressure oscillation and axial kinetic energy loss,which makes it difficult to design nozzle and improve propulsion ***,in order to improve the characteristics of detonation flow field,the three-dimensional numerical simulation of annular chamber and hollow chamber is carried out with premixed hydrogen/air as fuel in this paper,and then tries to combine the two chambers to weaken the oscillation characteristics of detonation flow field through the interaction of detonation flow field,which is a new method to regulate the detonation flow *** results show that there are four states of velocity vectors at the outlet of annular chamber and hollow chamber,which makes RDE be affected by rolling moment and results in the loss of axial kinetic *** the external flow field of combined chamber,the phenomenon of cyclic reflection of expansion wave and compression wave on the free boundary is observed,which results in Mach disk ***,the pressure monitoring points are set at the external flow *** pressure signal shows that the high-frequency pressure oscillation at the external flow field of the combined chamber has been greatly *** to the annular chamber,the relative standard deviation(RSD) has been reduced from 14.6% to5.6%.The results thus demonstrate that this method is feasible to adjust the pressure oscillation characteristics of the detonation flow field,and is of great significance to promote the potential of RDE and nozzle design.

关键词： Detonation flow field Combined chamber Pressure oscillation Velocity vector

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Boron-doping induced lithophilic transition of graphene for dendrite-free lithium growth

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Journal of Energy Chemistry 2021年第5期30卷 463-469页

作者： Wei Liu Pengbo Zhai Shengjian Qin jing xiao Yi Wei Weiwei Yang Shiqiang Cui Qian Chen Chunqiao Jin Shubin Yang Yongji Gong School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Materials Science and Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043HebeiChina State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Electrochemical Process

Li metal,possessing advantages of high theoretical specific capacity and low electrochemical potential,is regarded as the most promising anode material for next-generation ***,despite decades of intensive research,its practical application is still hindered by safety hazard and low Coulombic efficiency,which is primarily caused by dendritic Li *** address this issue,restraining dendrite growth at the nucleation stage is deemed as the most effective *** utilizing the difference of electronegativity between boron atoms and carbon atoms,carbon atoms around boron atoms in boron-doped graphene(BG)turn into lithiophilic sites,which can enhance the adsorption capacity to Li^(+)at the nucleation ***,an ultralow overpotential of 10 mV at a current density of 0.5 mA/cm^(2) and a high average Coulombic efficiency of 98.54%over more than 140 cycles with an areal capacity of 2 mAh/cm^(2) at a current density of 1 m A/cm^(2) were ***-Li|LiFePO_(4) full cells delivered a long lifespan of480 cycles at 0.5 C and excellent rate *** work provides a novel method for rational design of dendrite-free Li metal batteries by regulating nucleation process.

关键词： Lithium metal anode B-doped graphene Lithophilic transition DFT calculation Uniform Li deposition

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PSME2和STAT3双重抑制通过合成致死效应诱导食管鳞癌细胞死亡

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中国生物化学与分子生物学报 2024年第4期40卷 534-543页

作者：孙魁陈攀刘永萱康永安吴晓爽程月月程浩东刘其伟高社干齐义军河南科技大学临床医学院河南科技大学第一附属医院肿瘤医院省部共建食管癌防治国家重点实验室河南省微生态与食管癌防治重点实验室河南省肿瘤表观遗传重点实验室河南洛阳471003 许昌学院医学院细胞行为学重点实验室河南许昌461000

蛋白酶体激活物复合物亚基2(proteasome activator complex subunit 2,PSME2)表达异常与多种肿瘤发生发展密切相关,但在食管鳞癌(esophageal squamous cell carcinoma,ESCC)中功能及临床意义尚不明确。本研究分析了TCGA-ESCC和GSE53625数据库中ESCC转录物组数据,发现PSME2高表达组ESCC患者预后不良,且ESCC组织中PSME2蛋白表达水平高于癌旁组织。沉默KYSE30细胞和NE6-T细胞中PSME2表达,ESCC细胞的增殖、侵袭、迁移和克隆能力均显著下降,同时伴随着LC3-II/LC3-I蛋白表达明显升高、p62蛋白表达降低和自噬激活。GSEA富集分析表明,PSME2低表达组IL-6/STAT3信号通路激活,沉默KYSE30细胞和NE6-T细胞诱导了IL-6分泌和p-STAT3表达增加。上述PSME2沉默诱导的分子变化,能够被LMT28或WP1066逆转。PSME2沉默联合WP1066,使KYSE30与NE6-T细胞培养上清中LDH含量明显升高,Calcein/PI染色表明,死亡细胞率分别为36.69%和32.55%,显著高于PSME2沉默(6.78%和6.74%)或WP1066单独处理组(18.34%和9.70%)。本研究表明,PSME2促进ESCC恶性进展,PSME2沉默通过IL-6/STAT3信号通路代偿性激活ESCC自噬,联合PSME2沉默和STAT3抑制通过合成致死效应诱导食管鳞癌细胞死亡,表明PSME2是ESCC潜在分子治疗靶点,联合抑制PSME2和STAT3是ESCC治疗的新选择。

关键词：蛋白酶体激活物复合物亚基2 食管鳞癌 STAT3 自噬合成致死

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