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Ca_(2)MnO_(4)-layered perovskite modified by NaNO_(3)for chemical-looping oxidative dehydrogenation of ethane to ethylene

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Chinese Journal of Chemical Engineering 2024年第4期68卷 53-64页

作者： Weixiao Ding Kun Zhao Shican Jiang Zhen Huang fang he College of Chemistry and Bioengineering Guilin University of TechnologyGuilin 541006China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China

Chemical-looping oxidative dehydrogenation(CL-ODH)is a process designed for the conversion of alkanes into olefins through cyclic redox reactions,eliminating the need for gaseous O_(2).In this work,we investigated the use of Ca_(2)MnO_(4)-layered perovskites modified with NaNO_(3) dopants,serving as redox catalysts(also known as oxygen carriers),for the CL-ODH of ethane within a temperature range of 700-780℃.Our findings revealed that the incorporation of NaNO_(3) as a modifier significantly-nhanced the selectivity for-thylene generation from Ca_(2)MnO_(4).At 750℃and a gas hourly space velocity of 1300 h^(-1),we achieved an-thane conversion up to 68.17%,accompanied by a corresponding-thylene yield of 57.39%.X-ray photoelectron spectroscopy analysis unveiled that the doping NaNO_(3) onto Ca_(2)MnO_(4) not only played a role in reducing the oxidation state of Mn ions but also increased the lattice oxygen content of the redox ***,formation of NaNO_(3) shell on the surface of Ca_(2)MnO_(4) led to a reduction in the concentration of manganese sites and modulated the oxygen-releasing behavior in a step-wise *** modulation contributed significantly to the enhanced selectivity for ethylene of the NaNO_(3)-doped Ca_(2)MnO_(4) *** findings provide compelling evidence for the potential of Ca_(2)MnO_(4)-layered perovskites as promising redox catalysts in the context of CL-ODH reactions.

关键词： Chemical-looping oxidative dehydrogenation Ethane Ethylene NaNO_(3)-doped Ca_(2)MnO_(4)redox catalyst Layered perovskites

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Study on the flow structure in curved open channels with suspended vegetation using multi relaxation time lattice Boltzmann method

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Journal of Hydrodynamics 2024年第2期36卷 300-315页

作者： he-fang Jing Qiao-ling Zhang Wei-hong Wang Zong-ning Zhang School of Mathematics and Information Science North Minzu UniversityYinchuan750021China School of Civil Engineering North Minzu UniversityYinchuan750021China Department of Basic Courses Zhengzhou University of Science and TechnologyZhengzhou450064China

Suspended vegetation in rivers,lakes,reservoirs and canals can change flow structure,which will in turn affect the sediment transport and cause the variation of water ecological *** order to study the characteristics of bend flow through suspended vegetation,three-dimensional numerical simulations are carried out by using the multi-relaxation-time lattice Boltzmann method(MRT-LBM).The drag force induced by vegetation is added in the velocity correction in the equilibrium distribution and a hybrid format combined bounce and specular reflection scheme is applied in the solid-fluid *** the validation of this model,six cases are designed to conduct the numerical simulations according to the root depth and the arrangement of *** simulated results show that the suspended vegetation can redistribute the flow structure in curved open *** the arrangement of suspended vegetation,the main flow moves to the side without vegetation,and the distribution of velocity tends to be balanced when vegetation is arranged on the entire cross section,the range of circulating current is reduced from the whole cross section to the local position without vegetation,however,the circulating current can still exist in the curve where the suspended vegetation enters less than half of the water *** addition,it can also be concluded that the suspended vegetation can affect the lateral gradient of flow velocity,and the bed shear stress in the curved channel.

关键词： Multi-relaxation-time lattice Boltzmann method(MRT-LBM) suspended vegetation curved open channel circulating current bed shearstress

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Repressing iron overload ameliorates central poststroke pain via the Hdac2-Kv1.2 axis in a rat model of hemorrhagic stroke

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Neural Regeneration Research 2024年第12期19卷 2708-2722页

作者： he fang Mengjie Li Jingchen Yang Shunping Ma Li Zhang Hongqi Yang Qiongyan Tang Jing Cao Weimin Yang Department of Neurology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Department of Molecular Neuropathology Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of Nutrition The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Department of Neurology Henan Provincial People’s HospitalZhengzhouHenan ProvinceChina Department of Human Anatomy School of Basic Medical SciencesZhengzhou UniversityZhengzhouHenan ProvinceChina Neuroscience Research Institute Zhengzhou University Academy of Medical SciencesZhengzhouHenan ProvinceChina

Thalamic hemorrhage can lead to the development of central post-stroke *** in histone acetylation levels,which are regulated by histone deacetylases,affect the excitability of neurons surrounding the hemorrhagic ***,the regulato ry mechanism of histone deacetylases in central post-stroke pain remains unclea ***,we show that iron overload leads to an increase in histone deacetylase 2expression in damaged ventral posterolateral nucleus *** this increase restored histone H3 acetylation in the Kcna2 promoter region of the voltage-dependent potassium(Kv)channel subunit gene in a rat model of central post-stroke pain,thereby increasing Kcna2expression and relieving central ***,in the absence of nerve injury,increasing histone deacetylase 2 expression decreased Kcna2expression,decreased Kv current,increased the excitability of neurons in the ventral posterolateral nucleus area,and led to neuropathic pain ***,treatment with the iron chelator deferiprone effectively reduced iron overload in the ventral posterolateral nucleus after intracerebral hemorrhage,reversed histone deacetylase 2 upregulation and Kv1.2 downregulation,and alleviated mechanical hypersensitivity in central post-stroke pain *** results suggest that histone deacetylase 2 upregulation and Kv1.2 downregulation,mediated by iron overload,are important factors in central post-stroke pain pathogenesis and co uld se rve as new to rgets for central poststroke pain treatment.

关键词： central post-stroke pain hemorrhagic stroke histone deacetylase iron overload voltage-gated potassium ion channel 1.2

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From common biomass materials to high-performance tissue engineering scaffold: Biomimetic preparation, properties characterization, in vitro and in vivo evaluations

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Journal of Bioresources and Bioproducts 2024年第2期9卷 185-196页

作者： Zongpu Xu fang he Jing Yu Zhangze Yang Yu Zhu Rong Liao Ruyin Lyu Mei Yang Liangjun Zhu Mingying Yang Institute of Applied Bioresources College of Animal SciencesZhejiang UniversityHangzhou 310058China Key Laboratory of Silkworm and Bee Resource Utilization and Innovation of Zhejiang Province Zhejiang UniversityHangzhou 310058China Department of Neurosurgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Converting common biomass materials to high-performance biomedical products could not only reduce the environmental pressure associated with the large-scale use of synthetic materials,but also increase the economic *** as a very promising candidate has drawn considerable attention owing to its abundant sources and remarkable ***,pure chitosan materials usually exhibit insufficient mechanical properties and excessive swelling ratio,which seriously affected their in vivo stability and integrity when applied as tissue engineering ***,simultaneously improving the mechanical strength and biological compatibility of pure chitosan(CS)scaffolds becomes very ***,inspired by the fiber-reinforced con-struction of natural extracellular matrix and the porous structure of cancellous bone,we built silk microfibers/chitosan composite scaffolds via ice-templating *** biomimetic strategy achieved 500%of mechanical improvement to pure chitosan,and meanwhile still maintaining high porosity(>87%).In addition,the increased roughness of chitosan pore walls by embedded silk microfibers significantly promoted cell adhesion and *** importantly,after subcutaneous implantation in mice for four weeks,the composite scaffold showed greater struc-tural integrity,as well as better collagenation,angiogenesis,and osteogenesis abilities,suggesting its great potential in biomedicine.

关键词： Chitosan Biomimetic strategy Fiber-reinforced composite Mechanical property Biocompatibility

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Safflower Yellow Inhibits Progression of hepatocellular Carcinoma by Modulating Immunological Tolerance via FAK Pathway

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Chinese Journal of Integrative Medicine 2024年第4期30卷 339-347页

作者： JI Hua-feng YANG Zi-qiang HAN Jun-jun LI he-fang JIN Zhao-qing CheN Wei-qing CheN Fei-hua GONG Mou-chun Department of General Surgery First People's Hospital of Hangzhou Lin'an DistrictHangzhou(311300)China

Objective To explore the anti-tumor effect of safflower yellow(SY)against hepatocellular carcinoma(HCC)and the underlying potential *** An in vitro model was established by mixing Luc-hepa1-6 cells and CD3^(+)CD8^(+)T cells,followed by adding programmed cell death protein 1(PD-1)antibody(Anti-mPD-1)with or without *** apoptosis was detected by flow cytometry and the level of inflammatory cytokines was determined by enzyme-linked immunosorbent *** protein levels of programmed cell death 1 ligand 1(PD-L1),chemokine ligand(CCL5),C-X-C motif chemokine ligand 10(CXCL10)were measured by Western *** in situ animal model was established in mice followed by treatment with anti-mPD-1 with or without *** imaging was monitored with an AniView 100 imaging *** establish the FAK-overexpressed Luc-hepa1-6 cells,cells were transfected with adenovirus containing pcDNA3.1-FAK for 48 *** The fluorescence intensity,apoptotic rate,release of inflammatory cytokines,and CCL5/CXCL10 secretion were dramatically facilitated by anti-mPD-1(Pher enhanced by SY(Phermore,the enhanced effects of SY on inhibiting tumor cell growth,facilitating apoptosis and inflammatory cytokine releasing,suppressing the PD-1/PD-L1 axis,and inducing the CCL5/CXCL10 secretion in Anti-mPD-1 treated mixture of Luc-hepa1-6 cells and CD3+CD8+T cells were abolished by FAK overexpression(Phe progression of HCC by mediating immunological tolerance through inhibiting FAK.

关键词： hepatocellular carcinoma safflower yellow Chinese medicine tumor microenvironment programmed cell death protein 1 focal adhesion kinase

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The evolution and functional divergence of 10 Apolipoprotein D-like genes in Nilaparvata lugens

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Insect Science 2024年第1期31卷 91-105页

作者： Jia-Bao Lu Peng-Peng Ren Qiao Li fang he Zhong-Tian Xu Sai-Nan Wang Jian-Ping Chen Jun-Min Li Chuan-Xi Zhang Citrus Research Institute Southwest University/Chinese Academy of Agricultural SciencesNational Engineering Research Center for CitrusChongqingChina Technology Center of Wuhan Customs District HubeiChina Institute of Insect Science Zhejiang UniversityHangzhouChina

Apolipoprotein D(ApoD),a member of the lipocalin superfamily of proteins,is involved in lipid transport and stress *** only a single copy of the ApoD gene is found in humans and some other vertebrates,there are typically several ApoD-like genes in *** date,there have been relatively few studies that have examined the evolution and functional differentiation of ApoD-like genes in insects,particularly hemi-metabolous *** this study,we identified 10 ApoD-like genes(NlApoD1−10)with distinct spatiotemporal expression patterns in Nilaparvata lugens(BPH),which is an important pest of ***1−10 were found to be distributed on 3 chromosomes in a tandem array of NlApoD1/2,NlApoD3−5,and NlApoD7/8,and show sequence and gene structural divergence in the coding regions,indicating that multiple gene duplication events occurred during *** analysis revealed that NlApoD1−10 can be clustered into 5 clades,with NlApoD3−5 and NlApoD7/8 potentially evolving exclusively in the Delphacidae *** screening using an RNA interference approach revealed that only NlApoD2 was essential for BPH development and survival,whereas NlApoD4/5 are highly expressed in testes,and might play roles in ***,stress response analysis revealed that NlApoD3−5/9,NlApoD3−5,and NlApoD9 were up-regulated after treatment with lipopolysaccharide,H2O2,and ultraviolet-C,respectively,indicating their potential roles in stress resistance.

关键词： Apolipoprotein D BPH evolution functional divergence gene duplication NIApoD

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高中阶段普职比变动规律及未来20年趋势预测:生源的视角

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职业技术教育 2024年第18期45卷 6-15页

作者：贺芳陈伟惠州学院教育科学学院惠州516007 惠州学院惠州516007 广东省社会科学研究基地“惠州学院粤港澳大湾区教育高质量发展研究中心”

通过对高中阶段生源总量与普职比变动规律的把握,预测未来20年的发展趋势,对促进中职教育的可持续发展具有重要意义。研究表明,2011-2021年高中阶段教育数据特征表现为:普通高中的学位量、办学规模基本保持平稳;中等职业教育在事实上被... 详细信息

通过对高中阶段生源总量与普职比变动规律的把握,预测未来20年的发展趋势,对促进中职教育的可持续发展具有重要意义。研究表明,2011-2021年高中阶段教育数据特征表现为:普通高中的学位量、办学规模基本保持平稳;中等职业教育在事实上被当作满足人民群众高中阶段教育需求的调节器;普职比主要是因为学龄人口的波动而被动波动。面向未来,2023-2043年高中生源数量分别对应2008-2028年的出生人口,因学龄人口的减少,中等职业教育生源将在14年之后急剧减少已成定局;普职比将因中等职业教育的被动缩减而在2037-2043年间陷入新的不平衡;目前建立起来的职教高考通道将因普职比的变化而呈现出低选拔性。鉴于此,应适时调整中等职业教育政策的发展重心、理性设定高中教育阶段普职比、适时关注高等教育阶段普职比。

关键词：普职比变动规律趋势预测生源视角

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中等职业教育功能的国际定位与中国路径

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职业技术教育 2024年第4期45卷 12-20页

作者：贺芳陈伟惠州学院教育科学学院惠州516007 广东省社会科学研究基地“惠州学院粤港澳大湾区教育高质量发展研究中心” 惠州516007

根据经合组织数据库和欧盟数据库,国际中等职业教育功能主要定位于升学、就业和终身学习,在近十年间呈现出以下发展趋势:高中阶段职业教育以升学为主而高中后以就业为主、就业功能依然强劲、终身学习功能备受重视。科学技术发展、劳动... 详细信息

根据经合组织数据库和欧盟数据库,国际中等职业教育功能主要定位于升学、就业和终身学习,在近十年间呈现出以下发展趋势:高中阶段职业教育以升学为主而高中后以就业为主、就业功能依然强劲、终身学习功能备受重视。科学技术发展、劳动力市场需求的外力驱动,以及高等教育机会供给的拉动和职业教育与培训体系的内在驱动,是经合组织与欧洲各国中等职业教育功能定位及其变迁的主要原因。我国中等职业教育功能定位的优化,应扎根中国大地、顺应世界潮流,积极强化升学功能,有效推进人才培养模式与内容的多样化,全面彰显服务全民终身学习的功能。

关键词：中等职业教育功能定位升学就业终身学习

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胎母输血综合征并产后绒毛膜癌1例

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中华围产医学杂志 2024年第3期27卷 245-247页

作者：刘宇茵贺芳广州医科大学附属第三医院妇产科广州510150

本文报道1例确诊胎母输血综合征的患者,在足月妊娠、经阴道分娩20 d后因晚期产后出血就诊,确诊为绒毛膜癌,给予化学及手术治疗后达到完全缓解。随访1年,未见疾病进展。绒毛膜癌是胎母输血综合征的危险因素之一,建议对孕期诊断胎母输血... 详细信息

本文报道1例确诊胎母输血综合征的患者,在足月妊娠、经阴道分娩20 d后因晚期产后出血就诊,确诊为绒毛膜癌,给予化学及手术治疗后达到完全缓解。随访1年,未见疾病进展。绒毛膜癌是胎母输血综合征的危险因素之一,建议对孕期诊断胎母输血综合征的患者进行胎盘病理检查,产后密切随访人绒毛膜促性腺激素水平变化,以早期诊断绒毛膜癌,改善患者预后。

关键词：胎母输血综合征绒毛膜癌产后出血绒毛膜促性腺激素

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律他型的学校德育及其影响——一项关于处境不利学生的文化研究

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教育研究与实验 2024年第3期 81-89页

作者：何芳康永久北京师范大学教育学部北京100875

传统的文化缺陷理论将“文化贫困”的标签贴在处境不利的学生身上,以此来解释他们的学业失败。但铁西一中的田野研究显示,一种特殊的律他型的学校实践,可以提供更深层的解释。在那种客观化的道德世界中,存在着各种“位置不当”,规则被... 详细信息

传统的文化缺陷理论将“文化贫困”的标签贴在处境不利的学生身上,以此来解释他们的学业失败。但铁西一中的田野研究显示,一种特殊的律他型的学校实践,可以提供更深层的解释。在那种客观化的道德世界中,存在着各种“位置不当”,规则被放到了“最高善”的地位。学生的成长不是建立在潜移默化的文化惯习的基础之上,而是建立在刻意形成的行为习惯的基础之上。由于不断借助规则、身份、纪律的控制,而不是通过专业知识和人格力量来启迪和感染人,教师深层的教育意向不断消退。正是这样一种文化困顿的律他实践,使教育作为一种文化生产和建构的道德探险无从发生,将师生限制在客观的文化资本和诸种表面现象之中。

关键词：文化困顿习惯教育道德世界客观化律他实践

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