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Mechanism of ferrite nucleation induced by Y_(2)O_(2)S inclusion in low carbon steel

Journal of Iron and Steel Research International 2023年第6期30卷 1291-1299页

作者： hai-hui zhang hui-hui Xiong Jing Qin Jian-bo zhang Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000JiangxiChina National Rare Earth Functional Material Innovation Center Ganzhou 341000JiangxiChina

To reveal the mechanism of ferrite nucleation induced by Y_(2)O_(2)S inclusion in steel,the work of adhesion,interfacial energy,structure stability and electronic properties of Fe(111)/YY_(2)O_(2)S(001)interfaces with various terminations were first investigated using the first-principles ***,the steels with and without yttrium were prepared,while the rare earth yttrium-based inclusions in low carbon steel were characterized using an electron probe micro-analyzer,and the grain size of steel was analyzed using a scanning electron microscope with electron backscattered *** results show that the bonding strength of Fe/Y_(2)O_(2)S interfaces with S-and Y-terminations is stronger than that of the interface with *** Fe-hcp-S interfaces with S-termination have the highest work of adhesion(4.01 J/m2)and the lowest interface distance(1.323A).The Fe-hcp-S interface exhibits the highest stability,and its interfacial bonding force is mainly attributed to the strong hybridization of Fe-3d and S-2p orbitals in the energy range of-7.5-0 ***,the interfacial energy of Fe-hcp-S is substantially lower than those of the ferrite(s)/Fe(L)interface and the ferrite-austenite interface,suggesting that Y_(2)O_(2)S inclusions in steel can efficiently promote ferrite *** experimental observations demonstrate that the ferrite grain size of steel containing 0.03 wt.% Y is much more refined than that of the steel without yttrium,and the average grain size of steel with and without Y is 102 and 258μm,*** indicates that the results of our calculations match with experimental findings.

关键词： Ferrite nucleation Inclusion Interfacial energy First-principles calculation Refinement

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Effect of electropulsing treatment on solidification behavior of spring steels in a continuous casting mold simulator

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Journal of Iron and Steel Research International 2020年第6期27卷 656-664页

作者： Wan-lin Wang Guo-min Ying Jie Zeng hai-hui zhang School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina National Center for International Research of Clean Metallurgy Central South UniversityChangsha 410083HunanChina

An electropulsing-assisted mold simulator technique was developed to investigate the effects of a pulsed electric voltage on the quality of spring steels during continuous casting by analyzing the mold flux film,shell surface profile,shell micro-structure and inclusion *** results revealed significantly increased crystallization fraction of the mold flux film from 61.2%to 75.3%and finer crystalline phase morphology in the case of electropulsing *** surface of the initially solidified shell could be effectively healed,resulting in smoother shell surface profiles with higher pulsed voltage from 0 to ***,an increase in the pulsed voltage from 0 to 30V resulted in finer dendritic structures during solidification with decreasing secondary dendrite arm spacing from the values of 17.6-32.2 to 9.7-15.0μm in the direction of shell side toward melt *** addition,an area scan analysis of inclusions in the as-cast spring steel samples showed that the number of MnS inclusions in the size range of 2.0-4.0μm gradually decreased from 836 to 114 and the number of Al2O3 inclusions in the same size range decreased from 144 to 39,as the voltage increased from 0 to 30V.

关键词： Electropulsing treatment Mold flux film Shell surface proifle Inclusion distribution Shell microstructure

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Type Ⅰ and type Ⅱ Helicobacter pylori infection status and their impact on gastrin and pepsinogen level in a gastric cancer prevalent area

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World Journal of Gastroenterology 2020年第25期26卷 3673-3685页

作者： Lin Yuan Jun-Bo Zhao Ying-Lei Zhou Ya-Bin Qi Qiong-Ya Guo hai-hui zhang Muhammad Noman Khan Ling Lan Chang-He Jia Yan-Rui zhang Song-Ze Ding Department of Gastroenterology and Hepatology People's Hospital of Zhengzhou UniversityHenan ProvinceChina Henan Provincial People’s Hospital Henan ProvinceChina Henan University School of Medicine Zhengzhou 450003Henan ProvinceChina

BACKGROUND Type I Helicobacter pylori(***)infection causes severe gastric inflammation and is a predisposing factor for gastric ***,its infection status in stepwise gastric disease progression in this gastric cancer prevalent area has not been evaluated;it is also not known its impact on commonly used epidemiological gastric cancer risk markers such as gastrin-17(G-17)and pepsinogens(PGs)during clinical *** To explore the prevalence of type I and type II *** infection status and their impact on G-17 and PG levels in clinical *** Thirty-five hundred and seventy-two hospital admitted patients with upper gastrointestinal symptoms were examined,and 523 patients were enrolled in this *** infection was confirmed by both 13C-urea breath test and serological *** were divided into non-atrophic gastritis(NAG),nonatrophic gastritis with erosion(NAGE),chronic atrophic gastritis(CAG),peptic ulcers(PU)and gastric cancer(GC)*** serological G-17,PG I and PG II values and PG I/PG II ratio were also *** A total *** infection rate of 3572 examined patients was 75.9%,the infection rate of 523 enrolled patients was 76.9%,among which type I *** infection accounted for 72.4%(291/402)and type II was 27.6%;88.4%of GC patients were *** positive,and 84.2%of them were type I infection,only 11.6%of GC patients were *** *** rates of type I *** in NAG,NAGE,CAG,PU and GC groups were 67.9%,62.7%,79.7%,77.6%and 84.2%,*** infection resulted in significantly higher G-17 and PG II values and decreased PG I/PG II *** types of *** induced higher G-17 level,but type I strain infection resulted in an increased PG II level and decreased PG I/PG II ratio in NAG,NAGE and CAG groups over uninfected *** PG I levels showed no difference among all disease groups and in the presence or absence of ***;in stratified analysis,its level w

关键词： Helicobacter pylori Chronic gastric diseases Gastrin-17 Pepsinogen Gastric cancer

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Visible-light-responsive homologous heterostructure of oxynitrides constructed to boost charge separation and water splitting

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Science China Chemistry 2025年第1期68卷 186-191页

作者： hai Zou Yunfeng Bao Xueshang Xin Yu Qi Tengfeng Xie Fuxiang zhang State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences School of Chemistry and Chemical Engineering Liaoning Normal University College of Chemistry Jilin University

Constructing type II heterostructures represents a widely recognized strategy for enhancing charge separation and photocatalytic efficiency,but it remains challenging to fabricate homologous heterostructures based on visible-light-responsive semiconductors,especially for popularly investigated （oxy）nitrides with low thermal ***,we synthesized a homologous heterostructure （denoted as YTON＿H） based on the oxynitrides of YTaO4-xNyand YTa *** heterostructure exhibits type II band structure alignment and intimate interface achieved through a magnesium （Mg） powder-assisted nitridation *** with widely reported heterologous heterostructures,the as-obtained YTON＿H homologous heterostructure could similarly exhibit enhanced charge separation as well as photocatalytic water splitting performance with respect to its counterparts(YTaO4-xNyand YTaON2).Meanwhile,detailed structural characterizations and spectroscopy analysis have been made to confirm the formation of heterostructure and promotion of spatial charge separation.

关键词： charge separation heterostructure oxynitride photocatalysis visible light

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Post-tunable salt gel electrolytes toward flexible supercapacitor switches

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Journal of Energy Chemistry 2025年第1期100卷 114-124页

作者： hui Wang Shuang Chen Xuming Liu Qin zhang Xin Liu Polymeric and Soft Materials Laboratory School of Chemistry and Life Science and Advanced Institute of Materials Science Changchun University of Technology Polymeric and Soft Materials Laboratory School of Chemical Engineering and Advanced Institute of Materials Science Changchun University of Technology

Convertible hydrogel supercapacitors have emerged as promising energy storage devices in switches,diodes, and transistors. However, inherent weaknesses in ionic conductivity, mechanical properties,and water retention of hydrogel electrolytes seriously hinder their development. Inspired by the hardness conversion of sea cucumber skin, a conductivity and mechanics dual-tunable salt gel electrolyte is successfully designed. The salt gel presents a reversible switching of conductors-insulators and a mechanical regulation between softness and hardness via the dissolution-crystallization transition of sodium acetate trihydrate（SAT）. Meanwhile, the salt gels spontaneously grow a layer of “armor” through saturated phase-change salt crystals effectively reducing water evaporation of hydrogel ***, this phase-change soft-rigid conversion strategy will expand the capabilities of gel-based flexible supercapacitors(area capacitance: 258.6 mF cm-2), and the capacitance retention rate could still reach 86.9% after 3000 cycles at high temperatures. Moreover, the salt gel supercapacitor is potentially used in over-heat alarm systems. It is anticipated that the strategy of conductivity and mechanics of dual-tunable salt gel would provide a new perspective on the development of energy storage devices,wearable electronics, and flexible robots.

关键词： Capacitance

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Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

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Tungsten 2025年第1期7卷 1-31页

作者： Qiao Xie Ying-Jie Yu hai-Jun zhang Ya-Ping Deng Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

关键词： Electrocatalytic Energy conversion High-entropy alloys Structural modulation

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Unraveling brain aging through the lens of oral microbiota

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Neural Regeneration Research 2025年第7期20卷 1930-1943页

作者： Qinchao Hu Si Wang Weiqi zhang Jing Qu Guang-hui Liu State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical UniversityBeijingChina CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijingChina University of Chinese Academy of Sciences BeijingChina Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijingChina Aging Biomarker Consortium BeijingChina State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina

The oral cavity is a complex physiological community encompassing a wide range of *** of oral microbiota can lead to various oral infectious diseases,such as periodontitis and tooth decay,and even affect systemic health,including brain aging and neurodegenerative *** studies have highlighted how oral microbes might be involved in brain aging and neurodegeneration,indicating potential avenues for intervention *** this review,we summarize clinical evidence demonstrating a link between oral microbes/oral infectious diseases and brain aging/neurodegenerative diseases,and dissect potential mechanisms by which oral microbes contribute to brain aging and *** also highlight advances in therapeutic development grounded in the realm of oral microbes,with the goal of advancing brain health and promoting healthy aging.

关键词： Alzheimer's disease brain aging multiple sclerosis neurodegeneration neurodegenerative diseases oral microbiota Parkinson's disease periodontitis bacteria Porphyromonas gingivalis

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3种规范中总黄酮定量分析法的比较

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国际药学研究杂志 2017年第6期44卷 656-659页

作者：杨慧海张雪孙倩怡张晶吉林农业大学中药材学院长春130118

目的比较《中华人民共和国药典》2015版(A法)、《保健食品功效成分及卫生指标检验规范》(B法)和《保健食品功能成分检测与评价》(C法)3种规范中总黄酮定量分析结果的差异性,寻找其中的规律性。方法将21个以黄酮含量为质量检测指标的食... 详细信息

目的比较《中华人民共和国药典》2015版(A法)、《保健食品功效成分及卫生指标检验规范》(B法)和《保健食品功能成分检测与评价》(C法)3种规范中总黄酮定量分析结果的差异性,寻找其中的规律性。方法将21个以黄酮含量为质量检测指标的食药同源的药材、成药等样品分别按照3种规范进行总黄酮含量的测定,并对3组测定结果进行分析。结果A法所测定的值最高,C法测得值最低。A法记载测定值是B法的(1.4±0.12)倍和C法的(2.1±0.31)倍。结论 3种规范中的总黄酮定量方法对同一样品的测定结果存在显著差异,明确3种规范测定结果之间的数值关系,可避免影响到食药同源样品的质量评价。

关键词：《中华人民共和国药典》《保健食品功效成分及卫生指标检验规范》《保健食品功能成分检测与评价》总黄酮含量测定

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QTL for grain yield and yield parameters in winter wheat(Triticum aestivum L.)

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湖南农业大学学报（自然科学版） 2007年第S1期33卷 86-91页

作者： LIN hai,GUO hui-jun,zhang Xiu-ying,WANG Rui-xia,XIAO Shi-he(The National Key Facility for Crop Gene Resources and Genetic Improvement,Institute of Crop Science,12 Zhongguancun South Street,Beijing,100081,P.R)

Field trials with a set of 108 doubled haploid lines(DHs) derived from a cross between the Chinese winter wheat ***9613 and H1488 were run at Beijing(China).Phenotypic data were recorded for major agronomic yield traits,*** weight per ear,grain number per ear and thousand grain weight(Tgw) in two field trials at *** on the phenotypic data and a genetic map comprising 168 SSR markers,an analysis of quantitative trait loci(QTL) was carried out for yield and yield parameters using the composite interval mapping(CIM) approach.A total of 14 QTL were detected for these traits across two *** of these QTL located on chromosomes 1A and 2B,respectively,exhibited pleiotropic *** showing pleiotropic effects will be very useful for understanding the homeologous relationships of QTL and designing an appropriate marker-assisted selection programme by multi-trait selection in order to accumulate("pyramide") favorable alleles at different loci.

关键词： Doubled haploids Quantitative trait loci(QTL) Grain yield wheat(Triticum aestivum L.)

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有机硅无卤环保协效阻燃剂对PS阻燃作用的研究

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塑料工业 2018年第9期46卷 121-124页

作者：代海涛张慧娟阿拉善职业技术学院内蒙古阿拉善盟750300

以甲基三氯硅烷、季戊四醇、三聚氰胺氰尿酸盐为原料合成有机硅无卤协效阻燃剂,将其与聚磷酸铵(APP)复配可制备环保型阻燃剂。对协效阻燃剂进行红外光谱(IR)和核磁共振氢谱(1H NMR)分析得知,所制备协效阻燃剂结构与目标产物结构一致。... 详细信息

以甲基三氯硅烷、季戊四醇、三聚氰胺氰尿酸盐为原料合成有机硅无卤协效阻燃剂,将其与聚磷酸铵(APP)复配可制备环保型阻燃剂。对协效阻燃剂进行红外光谱(IR)和核磁共振氢谱(1H NMR)分析得知,所制备协效阻燃剂结构与目标产物结构一致。将复配阻燃剂注塑于聚苯乙烯(PS)塑料表面后的阻燃性能进行测定(垂直燃烧性能、极限氧指数、锥形量热仪测试)发现协效阻燃剂协效阻燃效果显著,可应用于PS塑料的协效阻燃。

关键词：有机硅化合物阻燃剂协效阻燃聚苯乙烯

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