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A comparison study of existence forms of Fe species in coke for solution loss reaction of carbon

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Journal of Iron and Steel Research International 2018年第7期25卷 692-699页

作者： Qiang Ling Hui-juan zhao Ling-yu Chen Rui-lun Xie zhao Lei zhi-gang zhao Anhui Key Laboratory of Coal Clean Conversion and Utilization School of Chemistry and Chemical Engineering Anhui University of Technology Ma'anshan 243002 Anhui China

Fe species were loaded by two different loading ways （absorption method and addition method） to investigate their effect on thermal properties of coke. The particulate coke reactivity of coke samples indicated that the added sample showed higher catalytic activity than the adsorbed sample at first, owing to the decreased structure and properties of coke and more catalytic active sites caused by the strong interaction between Fe species and coke. The presence of Fe species in the added sample weakened the microstructure of coke, and the Fe species were easier to be reduced than those in the absorbed sample due to its different existence form in coke. With further increased loading of Fe species, the different existence positions of Fe species caused more decrease in surface active sites in the added sample than in the adsorbed sample, leading to lower catalytic activity of added sample when the total iron content exceeded 1%. The catalytic mechanism implied that there may be a catalytic dominant factor change in the reaction between the catalytic effect of iron species and carbon surface active sites in coke; the catalytic effect of iron species is dominant in the reaction at first, but the catalytic effect of carbon surface active sites is dominant in the reaction with the further increased loading amount of Fe species.

关键词： Coke reactivity Catalytic mechanism Coke structure Fe species Existence form

Uncover the mystery of interfacial interactions in immiscible composites by spectroscopic microscopy:A case study with W-Cu

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Journal of Materials Science & Technology 2022年第31期126卷 106-115页

作者： zhi zhao Fawei Tang Chao Hou Xintao Huang Xiaoyan Song Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China

Characterizing immiscible metallic composites with electron microscopy and X-ray spectroscopy is the classic way of obtaining their structural and physical ***,such a combination lacks abil-ity to tell the interfacial interactions at grain *** we demonstrate a novel strategy to un-cover the mystery of interfacial interactions in such systems by spectroscopic *** morpho-logical and spectral data of samples were simultaneously recorded and analyzed,which reveals critical information regarding interfacial electronic *** W-Cu as a model,we experimentally quanti-fied its connectivity and unambiguously identified conditional bonding between W and ***,we chemically reconstructed the specific W-Cu boundary that possessed the strongest interactions and inves-tigated its atomic *** mechanism of W-Cu bonding was proposed and verified by first-principle *** above methodology holds great promise to serve as a universal approach in achieving in-depth understanding of immiscible composites.

关键词： Metal-matrix composites Interface Physical properties Spectroscopic microscopy Interfacial bonding

Grain-boundary segregation and grain growth in nanocrystalline substitutional solid solution alloys

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Journal of Materials Science & Technology 2024年第1期168卷 239-249页

作者： Fawei Tang Chao Hou Hao Lu zhi zhao Xiaoyan Song Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China

A model for describing solute segregation at grain boundaries has been developed for substitutional solid solution alloys,which integrates multiple factors from atomic to microstructural scales.A concept of mo-lar Gibbs free energy of segregation was introduced to evaluate the segregating capability of the solute elements in a closed system,through which the influences of grain boundary structure,grain size,ma-terial composition,and external conditions were *** on the evaluation of various energy forms related to solute segregation and grain growth processes,the nature of the thermal stabilization of nanograin structures by solute segregation was disclosed.A criterion for the destabilization of nanostruc-tures,which is determined by the competition of the change rates between the molar Gibbs free energy of segregation and the total energy of grain boundaries with grain size,has been *** study provided guideline to achieve high-temperature stability of nanograin structures of solid solution alloys even for the weakly segregating nanocrystalline systems.

关键词： Substitutional solid solution Grain boundary segregation Thermal stabilization Solute concentration Grain size

Bibliometric analysis on retinoblastoma literatures in PubMed during 1929 to 2010

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International Journal of Ophthalmology(English edition) 2011年第2期4卷 115-120页

作者： zhi-Guang zhao, Li-Xian Xu Department of Urology Tangdu Hospital the Fourth Military Medical University Xi'an 710038 Shaanxi Province China Department of Gastroenterology Xijing Hospital the Fourth Military Medical University Xi'an 710032 Shaanxi Province China Department of Anatomy and Editorial Office of Chinese Journal of Neuroanatomy the Fourth Military Medical University Xi'an 710032 Shaanxi Province China Outpatient Department of Oncology Institute of Tumor the Fourth Military Medical University Xi'an 710032 Shaanxi Province China Anesthesia School of Stomatology the Fourth Military Medical University Xi'an 710032 Shaanxi Province China

AIM: To determine the growth rule and tendency of retinoblastoma (Rb) literature, and to provide the basis for research of diagnosis, treatment and on Rb. METHODS: Bibliometric analyses were carried out on Rb literatures which contain the descriptors of Rb in their titles or texts from 1929 to 2010 in PubMed database (***. ***/Pubmed). The biomedical journals referring to Rb by using bibliometric indicators were calculated. The principal bibliometric indicators, i.e, Price's and Bradford's laws to the increase or distribution of scientific literature, the participation index of languages and the journals were applied. By means of manual coding, Rb documents were classified according to documents studied and to statistical analysis. RESULTS: During 1929-2010, there were 16162 literatures in the PubMed database including the word Rb. According to the literature type, it includes Review (n=2026), Randomized Controlled Trial (n = 7), Practice guideline (n = 3), meta-analysis (n = 4), letter (n = 215), editorial (n = 98), clinical trial (n = 115) and others (n = 13694). By the statistical analysis, its equation is near power index (y = 3.0477 x(2.6088), R(2) = 0.9666). From 1929 to 2010, Rb literatures in English were primarily dominant (90.71%) and the amount of the literature in Chinese ranked the fourth (1.37%). By searching PubMed, 1420 (8.8%) literatures covered were from 41 of 48 ophthalmological, and 406 (2.5%) literatures from 44 of 86 pediatrics journals that correlated with retinoblastoma (SCI-indexed). The data showed that the literatures of Rb were gradually increasing year by year and were approximate near power index during 1929-2010, and the document publishes published mainly in ophthalmological journals, and in English (90.71%), and showing that the study on Rb is a popular subject in the last half century. CONCLUSION: The literatures of Rb are gradually increasing, mainly English in ophthalmologic journals.

关键词： bibliometric analysis biomedical publications retinoblastoma journal literature

Role of apigenin in high glucose-induced retinal microvascular endothelial cell dysfunction via regulating NOX4/p38 MAPK pathway in vitro

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International Journal of Ophthalmology(English edition) 2023年第4期16卷 514-522页

作者： Li-Li Liu zhi-Yi zhao Department of Ophthalmology Liuzhou Workers’Hospitalthe Fourth Affiliated Hospital of Guangxi Medical UniversityLiuzhou 545005Guangxi Zhuang Autonomous RegionChina

AIM:To investigate the retinoprotective role of Apigenin(Api)against high glucose(HG)-induced human retinal microvascular endothelial cells(HRMECs),and to explore its regulatory ***:HRMECs were stimulated by HG for 48h to establish the in vitro cell *** concentrations of Api(2.5,5,and 10μmol/L)were applied for *** counting kit-8(CCK-8),Transwell,and tube formation assays were performed to examine the effects of Api on the viability,migration,and angiogenesis in HG-induced *** permeability was evaluated by Evans blue *** inflammatory cytokines and oxidative stress-related factors were measured using their commercial *** expression of nicotinamide adenine dinucleotide phosphate(NADPH)oxidase 4(NOX4)and p38 mitogen-activated protein kinase(MAPK)was measured by Western ***:Api prevented HG-induced HRMECs viability,migration,angiogenesis,and vascular permeability in a concentration-dependent ***,Api also concentration-dependently inhibited inflammation and oxidative stress in HRMECs exposed to *** addition,HG caused an elevated expression of NOX4,which was retarded by Api *** stimulation facilitated the activation of p38 MAPK signaling in HRMECs,and Api could weaken this activation partly via downregulating NOX4 ***,overexpression of NOX4 or activation of p38 MAPK signaling greatly weakened the protective role of Api against HG-stimulated ***:Api might exert a beneficial role in HGstimulated HRMECs through regulating NOX4/p38 MAPK pathway.

关键词： apigenin retinal microvascular endothelial cell glucose NOX4 p38 MAPK

Studies on the Synthesis of a Natural Product-Piceatannol and its Analogs

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Chinese Chemical Letters 2002年第6期13卷 521-524页

作者： zhi Song PIAO Lin WANG Ya Bin FENG zhi Zhong zhao Institute of Materia Medica Chinese Academy of Medical Sciences&Peking Union Medical CollageBeijing 100050

Piceatannol, (E)-3, 3, 4, 5-tetrahydroxy stilbene, a natural polyhydroxy stilbene, possesses many biological activities, its synthesis has been reported. We designed another route of its synthesis, which can be controlled more easily. The synthetic product was characterized by elemental analysis, IR, MS and 1H-NMR. Its analogs were synthesized by the similar method.

关键词： Total synthesis piceatannol analogs.

Synthesis of new hyodeoxycholic acid thiosemicarbazone derivatives under solvent-free conditions using microwave

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Chinese Chemical Letters 2011年第4期22卷 405-408页

作者： zhi Chuan Shi zhi Gang zhao Xing Li Liu Yu Chen College of Chemistry and Environmental Protection Engineering Southwest University for NationalitiesChengdu 610041China

An efficient and simple method for synthesis of new hyodeoxycholic acid thiosemicarbazone derivatives under solvent-free conditions using microwave has been *** main advantages are short reaction times,good conversions and the environmentally friendly nature of the *** preliminary results indicate that some of these compounds possess inhibitory effects against ***.

关键词： Thiosemicarbazone Steroids Hyodeoxycholic acid Antimicrobial activity Microwave

A Riemannian Inertial Mann Algorithm for Nonexpansive Mappings on Hadamard Manifolds

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Numerical Mathematics(Theory,Methods and Applications) 2023年第4期16卷 954-967页

作者： Teng-Teng Yao Xiao-Qing Jin zhi zhao Department of Mathematics School of SciencesZhejiang University of Science and TechnologyHangzhou 310023China Department of Mathematics University of MacaoMacao 999078SARChina Department of Mathematics School of SciencesHangzhou Dianzi UniversityHangzhou 310018China

The problem of finding fixed points of nonexpansive mappings on Hadamard manifolds is considered in this *** solve this kind of problem,we propose a modified Riemannian Mann algorithm with inertial *** the assumption of existence of fixed points of the nonexpansive mapping,the global convergence of the proposed algorithm is *** show the efficiency of the proposed algorithm,numerical comparisons with some existing algorithms are reported.

关键词： Nonexpansive mapping Hadamard manifold fixed point inertial Mann algorithm

Nielsen Theory on 3-manifolds Covered by S^2× R

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Acta Mathematica Sinica,English Series 2015年第4期31卷 615-636页

作者： Daciberg GONALVES Peter WONG Xue zhi zhao Dept. de Matemtica-IME-USP Caixa Postal 66.281-CEP 05314-970So Paulo-SP Brasil Department of Mathematics Bates College Department of Mathematics & Institute of Mathematics and Interdisciplinary Science Capital Normal University

Let f ： M→ M be a self-map of a closed manifold M of dimension dim M ≥ 3. The Nielsen number N（f） of f is equal to the minimal number of fixed points of f＇ among all self-maps f＇ in the homotopy class of f. In this paper, we determine N（f） for all self-maps f when M is a closed 3-manifold with S^2× R geometry. The calculation of N（f） relies on the induced homomorphisms of f on the fundamental group and on the second homotopy group of M.

关键词： Lefschetz number Nielsen number 3-manifolds