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Chinese Physics B 2025年第2期34卷 189-197页

作者： Lele Fan jie Zheng Fengge zhang Zhi-Qiang You School of Physics Henan Normal UniversityXinxiang 453007China Henan Academy of Sciences Zhengzhou 450046China

Recent observations by pulsar timing array collaborations have detected a stochastic common-spectrum signal, which may originate from scalar-induced gravitational waves generated by primordial curvature perturbations during *** the NANOGrav 15-year data set, we explore this hypothesis by constraining the primordial curvature power spectrum and reheating energy scale. We model the primordial power spectrum with a lognormal form and consider reheating with the equation of state parameter w = 1/6. Our Bayesian analysis reveals a narrow peak in the primordial power spectrum(the width of the spectrum △ < 0.05 at the 95% confidence level) and constrains the reheating temperature to be 0.03 GeV

关键词： gravitational waves pulsars

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

Hydrogen bond-induced conduction loss for enhanced electromagnetic attenuation in deep eutectic gel absorbers

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 738-746页

作者： Yuntong Wang Shengchong hui Zhaoxiaohan Shi Zijing Li Geng Chen Tao zhang Xinyue Xie Limin zhang Hongjing Wu MOE Key Laboratory of Material Physics and Chemistry under Extraordinary School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710072China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China

Gels and conductive polymer composites,including hydrogen bonds(HBs),have emerged as promising materials for electro-magnetic wave(EMW)absorption across various ***,the relationship between conduction loss in EMW-absorbing materials and charge transfer in HB remains to be fully *** this study,we developed a series of deep eutectic gels to fine-tune the quantity of HB by adjusting the molar ratio of choline chloride(ChCl)and ethylene glycol(EG).Owing to the unique properties of deep eutectic gels,the effects of magnetic loss and polarization loss on EMW attenuation can be *** results indicate that the quantity of HB initially increases and then decreases with the introduction of EG,with HB-induced conductive loss following similar *** a ChCl and EG molar ratio of 2.4,the gel labeled G22-CE2.4 exhibited the best EMW absorption performance,characterized by an effective absorption bandwidth of 8.50 GHz and a thickness of 2.54 *** superior performance is attributed to the synergistic ef-fects of excellent conductive loss and impedance matching generated by the optimal number of *** work elucidates the role of HB in dielectric loss for the first time and provides valuable insights into the optimal design of supramolecular polymer absorbers.

关键词： absorbers hydrogen bonds deep eutectic gels dielectric properties conduction loss

Fabrication of Ni-Zn spinel ferrite with superior magnetic performance from electric arc furnace dust and iron scale

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Journal of Iron and Steel Research International 2025年第1期32卷 105-114页

作者： Yang Li Wei-zhe jie Chang Chen Yi Su Wu Zhou Hua zhang Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina The Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan430081HubeiChina

The Ni-ZnFe_(2)O_(4)(NixZn_(1-x)Fe_(2)O_(4),x=0.4-0.7)spinel was synthesized using Zn2+extracted from electric arc furnace dust(EAFD),nickel chloride hexahydrate,and Fe^(3+)extracted from iron scale as raw *** zinc was selectively extracted from EAFD using CaO roasting followed by NH_(4)Cl solution *** ferric ion was leached from iron scale using HCl solution as acid *** experimental results demonstrate a high level of efficiency in the extraction of zinc,with a rate of 97.5%,and the leaching rate of ferric ion is 96.89%.The composition of the leaching solution is primary zinc and iron with low calcium,which is beneficial to the preparation of spinel *** influence of Ni content(x)and calcination temperature on the synthesis and magnetic properties of NixZn_(1-x)Fe_(2)O_(4)compounds was investigated by X-ray diffraction,scanning electron microscopy,and vibrating sample *** results revealed that both Ni content and calcination temperature significantly affect the synthesis and magnetic properties of spinel NixZn_(1-x)Fe_(2)O_(4).Under the conditions of Ni content set at x=0.6,calcination temperature of 1100℃,and a duration of 2 h,a spinel NixZn_(1-x)Fe_(2)O_(4)with high saturation magnetization(Ms=65.7 A m2 kg-1)and low coercivity(Hc=0.056 A m^(-1))was obtained.

关键词： Electric furnace arc dust Iron scale Spinel ferrite Magnetic performance Calcination temperature

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免疫衰老对老年人群疫苗效力影响的研究进展

现代预防医学 2021年第17期48卷 3220-3225页

作者：张慧洁王铭蔚白国辉遵义医科大学遵义医科大学第五附属(珠海)医院遵义医科大学附属口腔医院

目的分析老年群体接种相同疫苗后,疫苗效力不及年轻群体的主要原因。方法通过对中英文文献的查阅,以年龄为限定条件对国内外相关研究进行归纳。结果免疫衰老是造成接种后老年群体低抗体水平的主要原因。老年群体的免疫障碍可能与衰老、... 详细信息

目的分析老年群体接种相同疫苗后,疫苗效力不及年轻群体的主要原因。方法通过对中英文文献的查阅,以年龄为限定条件对国内外相关研究进行归纳。结果免疫衰老是造成接种后老年群体低抗体水平的主要原因。老年群体的免疫障碍可能与衰老、慢性炎症、微环境因素、性别及感染有关。免疫衰老对固有免疫和适应性免疫均造成一定程度负面影响。与年龄相关的免疫障碍限制了接种后老年群体免疫应答的能力。结论针对老龄群体对疫苗的免疫反应较弱的问题,目前通过增大接种剂量、增加抗原量以及优化佐剂的方式改善疫苗。为了进一步优化疫苗提出了黏膜免疫、生物调节剂以及重组病毒疫苗等改善方法。但目前批准用于老年群体的疫苗数量依旧稀少,老年群体疾病的防治仍存在不足。

关键词：免疫衰老疫苗疫苗效力老龄群体

Effect of surface species on the alcohol-acid adsorption from FTS wastewater on graphene:A structure-capacity study

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Journal of Environmental Sciences 2025年第3期149卷 651-662页

作者： Xiao Liu Xiaolong zhang Chunyu Geng Qinglan Hao jie Chang Xin Hu Yongwang Li Botao Teng Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin 300457China State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer MaterialsCollege of ChemistryNankai UniversityTianjin 300071China National Energy Center for Coal to Liquids Synfuels China Co.Ltd.Beijing 101407China Institute of Sustainability of Chemical Energy and EnvironmentAgency for ScienceTechnology and Research627833Singapore Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal UniversityJinhua 321004China

Fischer-Tropsch synthesis(FTS)wastewater retaining low-carbon alcohols and acids are organic pollutants as a limiting factor for FTS *** this work,the structurecapacity relationships between alcohol-acid adsorption and surface species on graphene were reported,shedding light into their intricate *** graphene oxide(GO)and reduced graphene oxide(rGO)were synthesized via improved Hummers method with flake graphite(G).The physicochemical properties of samples were characterized via SEM,XRD,XPS,FT-IR,and *** alcohol-acid adsorption behaviors and adsorption quantities on G,GO,and rGO weremeasured via theoretical and *** was revealed that the presence of COOH,C=O and C–O species on graphene occupy the adsorption sites and increase the interactions of water with graphene,which are unfavorable for alcoholacid *** equilibrium adsorption quantities of alcohols and acids grow in pace with carbon *** monolayer adsorption occurs on graphene was verified viamodel *** has the highest FTS modeling wastewater adsorption quantity(110 mg/g)due to the reduction of oxygen *** novel findings provide a foundation for the alcoholacid wastewater treatment,as well as the design and development of high-performance carbon-based adsorbent materials.

关键词： Alcohol-acid adsorption Fischer-Tropsch synthesis wastewater Graphene Surface species Density functional theory

Spherical Magnetic Fe-Alginate Microgels Fabricated by Droplet-Microfluidics Combining with an External Crosslinking Approach and the Study of Their pH Dependent Fe^(3+) Release Behaviors

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Chinese Journal of Polymer Science 2025年第2期43卷 289-302页

作者： jie Chen Run-Yu Yu ai-Qi Wang Zhe-Yu zhang Arezoo Ardekani Yuan-Du Hu Department of Materials Science and Engineering School of Physics Science and EngineeringBeijing Jiaotong UniversityBeijing100044China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of TechnologyGuangzhou510641China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai200438China Department of Mathematics School of Mechanical EngineeringPurdue University585 Purdue MallWest LafayetteIN47907-2088USA

Due to the rapid development and potential applications of iron(Ⅲ)-alginate(Fe-Alg)microgels in biomedical as well as environmental engineering,this study explores the preparation and characterization of spherical Fe-Alg microgels using droplet microfluidics combined with an external ionic crosslinking *** study focused on the role of Fe^(3+)and examined its effects on the physical/chemical properties of microgels under different ionic conditions and reduced or oxidized *** pH-dependent release behavior of Fe^(3+)from these microgels demonstrates their potential biomedical and environmental ***,the microgels can exhibit magnetism simply by utilizing in situ oxidation,which can be further used for targeted drug delivery and magnetic separation technologies.

关键词： Fe-alginate microgels Droplet microfluidics In situ oxidation Magnetism

农户对粮食生产补贴政策认知与规模变动反应研究?——基于黑龙江省种粮农户的调查

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农业现代化研究 2017年第4期38卷 614-622页

作者：张慧琴吕杰黑龙江八一农垦大学经济管理学院黑龙江大庆163319 沈阳农业大学经济管理学院辽宁沈阳110161

研究农户粮食生产补贴政策认知与种粮行为变动影响有助于政府明确政策实施效果,调整政策措施,缓解粮食生产供给侧结构改革压力。以黑龙江省为例,在调查农户对粮食生产补贴政策的认知与规模变动反应基础上,采用有序多分类Logistic模型对... 详细信息

研究农户粮食生产补贴政策认知与种粮行为变动影响有助于政府明确政策实施效果,调整政策措施,缓解粮食生产供给侧结构改革压力。以黑龙江省为例,在调查农户对粮食生产补贴政策的认知与规模变动反应基础上,采用有序多分类Logistic模型对粮农种粮规模变化进行分析,探讨影响农户种粮行为变动的因素。结果表明,农户对粮食补贴政策的认知度和满意度都很高,达80%以上。农户粮食生产收入增加会促使其扩大粮食种植面积;农户认知的粮食补贴对其粮食生产越起作用,农户越倾向于多种粮;农业生产资料投入量越多且价格越合理,农户扩大种粮的积极性越高。农户在当地找非农工作越难,越倾向于扩大种粮面积;农户家庭从事农业劳动的人数和承包耕地面积的多少对其种粮规模变动不显著。研究表明,粮食直接补贴政策的实施提高了农户种粮积极性,随着种植规模的扩大,粮食补贴起到一定的补偿作用。因此,未来主产区粮食生产补贴政策调整中,政府需要构建粮食价格与补贴的融合机制,要分层次分类别对农户进行重点补贴,要加大对农户生产投入产出的补贴。

关键词：粮食生产补贴农户认知规模变动种粮反应黑龙江省

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绝经激素治疗是否增加宫颈癌风险

中国实用妇科与产科杂志 2016年第1期32卷 65-67页

作者：张慧杰张淑兰中国医科大学附属盛京医院妇产科辽宁沈阳110004

激素补充治疗可以有效缓解绝经后妇女的低雌激素症状。但是女性生殖系统作为雌孕激素靶器官,激素的应用是否增加妇科恶性肿瘤的风险一直是研究者关注的问题。宫颈癌是我国女性生殖系统最常见的恶性肿瘤。文章就绝经激素治疗是否增加宫... 详细信息

激素补充治疗可以有效缓解绝经后妇女的低雌激素症状。但是女性生殖系统作为雌孕激素靶器官,激素的应用是否增加妇科恶性肿瘤的风险一直是研究者关注的问题。宫颈癌是我国女性生殖系统最常见的恶性肿瘤。文章就绝经激素治疗是否增加宫颈癌风险做简要论述。

关键词：宫颈癌激素补充治疗绝经

全局负载均衡下云环境中的大数据动态迁移方法

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计算机科学 2018年第1期45卷 196-199页

作者：章勇张洁卉柳斌华中科技大学网络与计算中心武汉430074

在云环境中,数据负载均衡化速度较慢且易出现数据倾斜,这严重干扰了系统状态。为了减小数据迁移的代价,提出一种在全局负载均衡下云环境中的大数据动态迁移方法。首先构造负载均衡模型,在均衡负载下计算数据迁移成本,并给出最小数据迁... 详细信息

在云环境中,数据负载均衡化速度较慢且易出现数据倾斜,这严重干扰了系统状态。为了减小数据迁移的代价,提出一种在全局负载均衡下云环境中的大数据动态迁移方法。首先构造负载均衡模型,在均衡负载下计算数据迁移成本,并给出最小数据迁移成本模型。计算数据迁移成本并评估虚拟机数据负载资源利用率,从而使数据重载的服务器转移到数据轻载的服务器上,达到云环境中的数据均衡化。仿真实验结果证明,所提方法提高了数据负载的均衡化速度和均衡效率,降低了数据迁移成本,且提高了资源利用率。

关键词：负载均衡资源利用率数据迁移