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Significant enhancement in water resistance of Pd/Al2O3 catalyst for benzene oxidation by Na addition

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Chinese Chemical Letters 2019年第7期30卷 1450-1454页

作者： Shunyu Kang Meng Wang Na Zhu Chunying Wang hua deng Hong He Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

A series of Na-doped 1 wt% Pd/Al2O3 catalysts with different Na loadings were prepared by wet impregnation and tested for the catalytic oxidation of benzene. Suitable addition of Na had a remarkable promotion effect on water resistance and enhancement of low temperature activity of Pd/Al2O3 catalysts. The optimal mole ratio between Na and Pd was 1:1. The properties of the prepared catalysts were characterized by X-ray diffraction (XRD), Brunauer Emmett Teller (BET), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), O2-temperature-programmed desorption (O2-TPD), and in situ DRIFTS. Results indicated that the addition of Na not only decreased the content of adsorbed water species but also increased the amount of liable surface oxygen species, which are likely the key factors for the excellent water resistance of the catalyst. Na addition also improved the mobility of the lattice oxygen species, which was favorable for catalytic activity. Moreover, the well-dispersed negatively charged Pd particles and suitable redox properties derived from Na addition also contributed to the improved performance and water resistance of the Na1Pd1/Al2O3 catalyst. In situ DRIFTS results revealed that benzene was oxidized to maleate and acetate species via intermediate o-benzoquinone species, which finally turned into harmless CO2 and H2O.

关键词： Sodium addition Pd/Al2O3 Benzene Water resistance Catalytic oxidation

Different treatments for different mechanisms in vasovagal syncope

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Journal of Geriatric Cardiology 2006年第1期3卷 61-64页

作者： Quan FANG Kangan CHENG hua deng Ning WU Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences Department of Cardiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences

The treatment of vasovagal syncope has been by far unsatisfactory. Beta-blockers may prevent vasovagal syncope, but they exacerbates heart asystole. Cardiac pacing prevents syncope but notpresyncope. The frequent, serious vasovagal syncope attacks of a 63- year-old woman patient were completely prevented by administration of 100 mg metoprolol (b.i.d) for 3 months until the patient experienced a complete heart block. A DDD pacemaker implantation abolished syncope but not the presyncope, which was eventually prevented in a follow-up period of 24 months by adding 75 mg atenalol twice a day. This case suggests a different mechanism involved in vasovagal syncope.

关键词： vasovagal syncope beta-blocker cardiac pacing tilt table test heart block

Morphological changes in Parkinson's disease based on magnetic resonance imaging:A mini-review of subcortical structures segmentation and shape analysis

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World Journal of Psychiatry 2022年第12期12卷 1356-1366页

作者： Jin-huan deng Han-Wen Zhang Xiao-Lei Liu hua-Zhen deng Fan Lin Department of Radiology The First Affiliated Hospital of Shenzhen UniversityHealth Science CenterShenzhen Second People’s HospitalShenzhen 518035Guangdong ProvinceChina

Parkinson's disease(PD)is a neurodegenerative disorder caused by the loss of dopaminergic neurons in the substantia nigra,resulting in clinical symptoms,including bradykinesia,resting tremor,rigidity,and postural *** pathophysiological changes in PD are inextricably linked to the subcortical *** analysis is a method for quantifying the volume or surface morphology of structures using magnetic resonance *** this review,we discuss the recent advances in morphological analysis techniques for studying the subcortical structures in PD in *** approach includes available pipelines for volume and shape analysis,focusing on the morphological features of volume and surface area.

关键词： Parkinson's disease Dopaminergic neurons Magnetic resonance imaging Substantia nigra Morphological

Enhanced performance of solid-state Li–O_2 battery using a novel integrated architecture of gel polymer electrolyte and nanoarray cathode

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Rare Metals 2018年第6期37卷 527-535页

作者： Liang Xiao Er-Wei Li Jing-Yu Yi Wen Meng Bo-hua deng Jin-Ping Liu School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

The present work proposes a novel strategy to fabricate an integrated architecture of gel polymer electrolyte （GPE）-nanoarray cathode for lithium-O2 batteries （LOBs）. As a proof-of-concept experiment, the photo-initiated in situ polymerization of GPE was carried out via incorporating the precursor solution in advance into a self- standing binder-free oxygen electrode of Co3O4 nanosheets array grown on carbon cloth （Co3O4@CC）, forming an integrated GPE-Co3O4@CC architecture. The performance of the solid-state LOBs using the GPE-Co3O4@CC assembly is greatly enhanced compared to the counterparts with a traditional cell structure, in which GPE was sandwiched by a lithium metal and a cathode. The enhanced performance is ascribed to the combination of the in situ polymerization of GPE and the versatile structure of nanoarray electrode, which results in abundant interfacial contacts between GPE and electrode. This work presents an alternative way to develop high-performance solid-state LOBs by combining the advantages of both gel polymer electrolytes and nanoarray electrodes.

关键词： Solid-state Li-O2 battery Gel polymer electrolyte Co3O4 nanosheet Nanoarray electrode Electrolyte-cathode interface

多发性骨髓瘤患者血清sIL-2R表达情况与患者预后的关系

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承德医学院学报 2024年第1期41卷 26-29页

作者：姚欣崔亚君娄东亮邓华开封市人民医院血液内分泌科河南开封475002 郑州人民医院

目的探究多发性骨髓瘤(MM)患者血清sIL-2R表达情况与患者预后的关系。方法选取开封市人民医院2018年3月~2020年7月收治的72例MM患者作为研究对象,根据预后情况将72例MM患者分为存活组、死亡组,分析MM患者死亡的危险因素,绘制受试者工作... 详细信息

目的探究多发性骨髓瘤(MM)患者血清sIL-2R表达情况与患者预后的关系。方法选取开封市人民医院2018年3月~2020年7月收治的72例MM患者作为研究对象,根据预后情况将72例MM患者分为存活组、死亡组,分析MM患者死亡的危险因素,绘制受试者工作特征曲线(ROC)判断发生死亡时血清sIL-2R最佳截断值,根据线下面积评估血清sIL-2R表达水平与患者预后的关系。结果随访3年中,72例MM患者存活45例(62.50%),死亡27例(37.50%)。死亡组MM分期Ⅲ期人数比例高于存活组,β_(2)-微球蛋白水平(β_(2)-MG)、血清钙(Ca)水平、sIL-2R水平及轻链比值(K/λ),高于存活组,差异有统计学意义(P<0.05)。Logistic多因素回归分析结果显示,MM分期、β_(2)-MG、Ca、sIL-2R水平及K/λ值,均为MM患者死亡的危险因素(P<0.05)。ROC曲线显示,MM患者最佳截断值为328.50,曲线下面积为0.903,灵敏度为86.75%,特异度为88.75%,95%CI(1.27~3.01),提示血清sIL-2R水平可用于预测MM患者的预后情况。结论sIL-2R水平对MM患者的预后有着重要的预测价值,MM分期、β_(2)-MG、Ca水平及K/λ值,均为MM的危险因素。

关键词：多发性骨髓瘤血清sIL-2R表达情况预后关系

溃疡性结肠炎免疫关键基因机制分析及中药筛选

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世界中西医结合杂志 2024年第3期19卷 481-494页

作者：赵继亭黄迪国嵩闫华栾庆鑫邓华亮孙轸山东中医药大学山东济南250014 山东中医药大学附属医院山东济南250014

目的基于生物信息学技术,筛选溃疡性结肠炎(Ulcerative colitis,UC)关键免疫靶基因,分析相关机制,筛选有效治疗中药,为UC基础研究及中医药精准辨证治疗提供理论支持。方法应用GEO数据集、ImmPort数据库、SRTING数据库、cytoHubba插件等... 详细信息

目的基于生物信息学技术,筛选溃疡性结肠炎(Ulcerative colitis,UC)关键免疫靶基因,分析相关机制,筛选有效治疗中药,为UC基础研究及中医药精准辨证治疗提供理论支持。方法应用GEO数据集、ImmPort数据库、SRTING数据库、cytoHubba插件等筛选UC关键免疫靶基因。对靶基因进行logistic单因素分析,应用cor函数进行相关性分析,应用CIBERSORT算法进行免疫浸润分析,应用Enrichr数据库进行KEGG、GO富集分析,通过miRWalk、RNA22、RNAInter、TargetScan数据库检索筛选miRNA,并通过Coremine Medical数据库筛选潜在治疗中药。结果筛选出15个靶基因呈表达上调,均为UC独立危险因素。免疫浸润分析显示,CD4^(+)记忆性T细胞、M0巨噬细胞、M1巨噬细胞、中性粒细胞等在组间差异表达,且靶基因与免疫细胞相关性密切。KEGG分析IL-17信号通路、TNF信号通路等是重要通路,GO分析生物过程主要在中性粒细胞、粒细胞趋化作用等方面,细胞成分主要在三级颗粒管、含胶原蛋白的细胞外基质等方面,分子功能主要在趋化因子活性、趋化因子受体结合等方面。筛选出的9个miRNA与靶基因具有潜在调控关系,筛选出的黄芩、人参、郁金等中药具有多靶点治疗UC的潜能。结论UC免疫机制复杂,是多因素、多靶点、多通路协同作用的结果。本研究通过对UC免疫关键基因分析,有利于探究UC发病机制,发掘潜在作用靶点及临床价值,为基础研究及有效治疗方案的完善提供新的视角。

关键词：溃疡性结肠炎免疫相关基因生物信息学免疫浸润信号通路 miRNA 中药

The effect of hydrogen reduction of α-MnO_(2) on formaldehyde oxidation: The roles of oxygen vacancies

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Chinese Chemical Letters 2023年第3期34卷 171-174页

作者： Liping Zhou Chunying Wang Yaobin Li Xiaofeng Liu hua deng Wenpo Shan Hong He College of Resources and Environmental Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant ConversionInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research StationInstitute of Urban EnvironmentChinese Academy of SciencesNingbo 315800China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

A series of α-MnO_(2) catalysts with various Mn valence states were treated by hydrogen reduction for different periods of time. Their catalytic capacity for formaldehyde(HCHO) oxidation was evaluated. The results indicated that hydrogen reduction dramatically improves the catalytic performance of α-MnO_(2) in HCHO oxidation. The α-MnO_(2) sample reduced by hydrogen for 2 h possessed superior activity and could completely oxidize 150 ppm HCHO to CO_(2) and H_(2)O at 70℃. Multiple characterization results illustrated that hydrogen reduction contributed to the production of more oxygen vacancies. The oxygen vacancies on the catalyst surface enhanced the adsorption, activation and mobility of O_(2) molecules, and thereby enhanced HCHO catalytic oxidation. This study provides novel insight into the design of outstanding MnO_x catalysts for HCHO oxidation at low temperature.

关键词： Hydrogen reduction α-MnO_(2) Formaldehyde oxidation Oxygen vacancies

Theoretical studies on the structures and reactivity of stannylenoids *** structures and isomerization of stannylenoid H_2SnLiF

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Chinese Journal of Chemistry 1996年第4期14卷 310-314页

作者： QIU, hua-Yu deng, Cong-HaoInstitute of Theoretical Chemistry, Shandong University, Jinan, Shandong 250100, China Institute of Theoretical Chemistry Shandong University Jinan Shandong 250100 China

The structures of singlet stannylenoid H2SnLiF have been examined by ab initio MO theory. Four equilibrium states and three transition states of isomerization reaction are located. The calculation shows that the p-complex 1 is the most stable and experimentally detectable. The other three species, three-membered ring 2, o-complex 3 and tetrahedron 4, are also local minima on the potential energy surface, but are higher in energy.

关键词： Stannylenoid ab initio p-complex structure isomerization reaction

黄芪多糖脂质体的制备及其在Caco-2细胞模型的转运特性研究

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中国畜牧兽医 2024年第10期51卷 4606-4615页

作者：叶钰滢王鸿鑫刘栩沂韩梓杰邓桦张楠张德显杨鸿佛山大学生命科学与工程学院佛山528231

【目的】研究黄芪多糖脂质体(Astragalus polysaccharide liposomes,APSL)制备及其在Caco-2细胞模型中的转运。【方法】采用薄膜分散法制备APSL,通过透射电镜观察APSL结构,鱼精蛋白法检测APSL的包封率及载药量;建立Caco-2单层细胞模型,... 详细信息

【目的】研究黄芪多糖脂质体(Astragalus polysaccharide liposomes,APSL)制备及其在Caco-2细胞模型中的转运。【方法】采用薄膜分散法制备APSL,通过透射电镜观察APSL结构,鱼精蛋白法检测APSL的包封率及载药量;建立Caco-2单层细胞模型,通过透射电镜观察其结构,测量细胞电阻值及荧光素钠表观渗透系数(apparent permeability coefficient,Papp)来评价Caco-2细胞模型的致密性和完整性;分别进行肠腔侧(apical side,AP)到基底侧(basolateral side,BL)及BL到AP侧两个转运方向的跨膜转运试验,分析药物浓度及P-糖蛋白(P-gp)的抑制剂维拉帕米溶液(Verapamil,Ver)对转运的影响。【结果】APSL包封率为71.74%±4.87%,载药量为2.92%,透射电镜下可见球状双层结构,粒径为(126.6±0.283)nm(n=3),聚合物分散性指数(polymer dispersity index,PDI)为0.190±0.009;透射电镜下观察Caco-2细胞紧密结合,形成微绒毛结构,跨膜电阻值达到650Ω·cm^(2),碱性磷酸酶(alkaline phosphatase,ALP)比值达到3.05,荧光素钠Papp为1.96×10^(-7)cm/s,可满足转运试验的要求。在不同浓度下(75、150、300μg/mL),黄芪多糖(APS)的外排率(efflux ratio,ER)均>1.5,APSL的ER均0.05)。与APS组ER(3.995)相比,APSL组的ER(1.005)降低。【结论】APS在体外Caco-2细胞单层模型上的转运较差,为低渗透性化合物,可能存在P-gp蛋白外排,而APSL能够增加APS的转运吸收,提高药物渗透性。

关键词：黄芪多糖脂质体 Caco-2细胞模型吸收特性

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