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Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 504-514页

作者： Lou Zhang Shuo li Fu Tang Jingkai Zhang Yuetong Kang Hean Zhang lidong li State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Silver nanoparticles(Ag NPs)have attracted attention in the field of biomaterials due to their excellent antibacterial ***,the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water *** this work,Ag NPs(31.2 nm in diameter)were prepared using the extract of straw,an agricultural waste,as the reducing and stabilizing *** analysis revealed that the straw extract contained lignin,the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag *** surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their *** the prepared Ag NPs were added to the precursor solution of acrylamide,free radical polymerization was triggered without the need for extra heating or light irradiation,resulting in the rapid formation of an Ag NP-polyacrylamide composite *** inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag *** prepared hydrogel may have potential applications in the fabrication of biomedical materials,such as antibacterial dressings.

关键词： silver nanoparticles hydrogel straw extraction antibacterial

Rim-Flo二沉池在活性污泥系统中的应用

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中国资源综合利用 2012年第1期30卷 55-57页

作者：杨淑霞 James D.Riddell 李春鞠西门子(天津)水技术工程有限公司天津300191 西门子(中国)有限公司上海分公司上海200082

通过分析出水SS指标对出水COD等生化指标的影响,阐明了出水SS值对全面提升出水排放标准的重要性。西门子的周进周出二沉池工艺以及与其配套的单管吸泥机设备在取得常规中进周出辐流式二沉池2～3倍设计负荷的前提下,能够达到更高的出水... 详细信息

通过分析出水SS指标对出水COD等生化指标的影响,阐明了出水SS值对全面提升出水排放标准的重要性。西门子的周进周出二沉池工艺以及与其配套的单管吸泥机设备在取得常规中进周出辐流式二沉池2～3倍设计负荷的前提下,能够达到更高的出水排放标准。它不仅广泛应用于市政污水处理,也可应用于造纸、印染等工业水领域。

关键词： SS 周进周出工艺单管吸泥机设计负荷

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医保统筹费用的预算与模拟监控初探

中国医院统计 2013年第6期20卷 440-443页

作者：陈立王安民夏敏李春菊贺建张兴玉绵阳市中心医院四川省621000

目的：探索多区域医保统筹费用在医院各专业的预算方式，以便在区域医保统筹费用框架范围内，实施合理的监控。方法根据多个区域医保统筹费的要求，以医院各专业工作量为基础，前瞻性的预算各专业不同区域的医保统筹费用，并模拟跟踪监... 详细信息

目的：探索多区域医保统筹费用在医院各专业的预算方式，以便在区域医保统筹费用框架范围内，实施合理的监控。方法根据多个区域医保统筹费的要求，以医院各专业工作量为基础，前瞻性的预算各专业不同区域的医保统筹费用，并模拟跟踪监控。结果通过模拟监控，预算的工作量与预算的各专业医保统筹费用波动一致，预算的各专业医保统筹费用值与半年实际发生值的统计检验无显著差异。结论本预算和模拟监控方法简单便捷、符合实际，可供同行参考和进一步探讨。

关键词：医保统筹费用预算模拟监控

Increase in the variability of terrestrial carbon uptake in response to enhanced future ENSO modulation

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 32-38页

作者： Younong li li Dan Jing Peng Qidong Yang Fuqiang Yang Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of climate change in middle and low latitudes and thus strongly influences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon flux variability are projected to increase in the future,but their connection still needs further *** investigate the impact of future ENSO modulation on carbon flux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon flux variability in middle and low latitudes,and their relationship,under different scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon flux variability showing an increasing trend in the *** higher the emissions scenario,especially SSP5-8.5 compared to SSP2-4.5,the greater the increase in *** flux variability in the middle and low latitudes under SSP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under SSP5-8.5 it increases by 58.2%.Further analysis suggests that ENSO influences mid-and low-latitude carbon flux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of gross primary productivity towards regional temperature fluctuations,combined with the intensified influence of ENSO on land surface temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

Fabrication of multilayer films from regenerated cellulose and graphene oxide through layer-by-layer assembly

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Progress in Natural Science:Materials International 2012年第4期22卷 341-346页

作者： li Tang Xiang li De Du chunju He College of Materials Science and Engineering Donghua University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

A key challenge in the preparation of nanoplatelet-filled polymer composites is the ability to realize the nanometer-level dispersion and the planar orientation of nanosheets in polymer matrices. In this report, multilayer films were successfully fabricated by layer-by-layer assembly of regenerated cellulose and graphene oxide, in which graphene oxide nanosheets were used as the building blocks. The thickness of 50 layer film is about 20 mm and it exhibits a high degree of smoothness. This may be attributed to the well-defined layered structure with high degree of planar orientation and nanolevel assemblies of graphene oxide nanosheets in the polymer matrices. Typical field emission scanning electron microscope images demonstrate an ordered arrangement of layers. The electrical conductivity of the multilayer films shows a remarkable increase with increasing layer of the films. A significant enhancement of mechanical properties has been achieved, that is, a 110.8% improvement of elastic modulus and a 262.5% increase of hardness respectively.

关键词： Regenerated cellulose Graphene oxide Layer-by-layer assem-bly Multilayer films

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海图集总体设计内容及技术方法研究

海洋测绘 2016年第3期36卷 48-51页

作者：李春菊张玉洁何桂敏李庆伟吴佳鑫海军出版社天津300450 海军驻天津代表室天津300042

为进一步提高海图集的编制水平,更好地为国家经济建设和国防建设服务,首先系统阐述了海图集总体设计的主要内容、技术方法和一般规律,并结合具体图集编制实践对海图集的内容选题、图幅设计、结构设计等内容进行了深入研究和详细分析,为... 详细信息

为进一步提高海图集的编制水平,更好地为国家经济建设和国防建设服务,首先系统阐述了海图集总体设计的主要内容、技术方法和一般规律,并结合具体图集编制实践对海图集的内容选题、图幅设计、结构设计等内容进行了深入研究和详细分析,为海图集设计编制工作提供理论借鉴和参考。

关键词：海图制图海图集内容选题结构设计图幅设计

Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai li Zhen Ma Jin-Hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

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泌阳凹陷双河水下冲积扇的沉积特征

石油学报 1983年第1期 11-16页

作者：朱水安李纯菊陈永正高玉荣河南南阳油田

泌阳凹陷是一个第三系陆相沉积的断陷湖盆,面积仅1000平方公里,含油比较丰富。双河水下冲积扇形成的岩性上倾尖灭油藏,发育于凹陷南部的下第三系核三段。双河水下冲积扇,具有一些特点:1、岩性以分选差的粗碎屑为主,层理以块状层理和递... 详细信息

泌阳凹陷是一个第三系陆相沉积的断陷湖盆,面积仅1000平方公里,含油比较丰富。双河水下冲积扇形成的岩性上倾尖灭油藏,发育于凹陷南部的下第三系核三段。双河水下冲积扇,具有一些特点:1、岩性以分选差的粗碎屑为主,层理以块状层理和递变层理较为常见;2、沉积韵律以多次洪水浊流形成的复合及复合反韵律为主;3、粒度以洪水浊流型为主;4、水下冲积扇的几何形态,平面呈扇状,剖面呈楔状;5、水下冲积扇可分为扇根、扇中、扇端三个亚相带;6、扇体的顶部发育了另一种砂体类型——水下河道浊积岩。油田主要形成于扇中和扇端部位,圈闭类型为多层砂岩上倾尖灭的岩性圈闭。

关键词：水下冲积扇岩性泌阳凹陷层理沉积构造砂岩碎屑岩沉积特征尖灭线扇体浊流流动(力学) 双河

Targeting epigenetic mechanisms in amyloid-β-mediated Alzheimer’s pathophysiology:unveiling therapeutic potential

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Neural Regeneration Research 2025年第1期20卷 54-66页

作者： Jennie Z.li Nagendran Ramalingam Shaomin li Ann Romney Center for Neurologic Diseases Brigham and Women’s Hospital and Harvard Medical SchoolBostonMAUSA

Alzheimer’s disease is a prominent chronic neurodegenerative condition characterized by a gradual decline in memory leading to *** evidence suggests that Alzheimer’s disease is associated with accumulating various amyloid-βoligomers in the brain,influenced by complex genetic and environmental *** memory and cognitive deficits observed during the prodromal and mild cognitive impairment phases of Alzheimer’s disease are believed to primarily result from synaptic *** life,environmental factors can lead to enduring changes in gene expression and the emergence of brain *** changes,known as epigenetic modifications,also play a crucial role in regulating the formation of synapses and their adaptability in response to neuronal *** this context,we highlight recent advances in understanding the roles played by key components of the epigenetic machinery,specifically DNA methylation,histone modification,and microRNAs,in the development of Alzheimer’s disease,synaptic function,and activity-dependent synaptic ***,we explore various strategies,including enriched environments,exposure to non-invasive brain stimulation,and the use of pharmacological agents,aimed at improving synaptic function and enhancing long-term potentiation,a process integral to epigenetic ***,we deliberate on the development of effective epigenetic agents and safe therapeutic approaches for managing Alzheimer’s *** suggest that addressing Alzheimer’s disease may require distinct tailored epigenetic drugs targeting different disease stages or pathways rather than relying on a single drug.

关键词： Alzheimer’s disease DNA methylation enriched environments histone modification microRNAs non-invasive brain stimulation synaptic plasticity