检索结果-南通市图书馆

Surface-enhanced Raman scattering on nanodiamond-derived carbon onions

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Nanotechnology and Precision Engineering 2019年第1期2卷 35-39页

作者： Ying Song Zongwei Xu Andreas Rosenkranz mathias Rommel Changkun Shi Fengzhou Fang State Key Laboratory of Precision Measuring Technology & Instruments Centre of MicroNano Manufacturing Technology Tianjin University Department of Chemical Engineering Biotechnology and Materials Universidad de Chile Fraunhofer Institute for Integrated Systems and Device Technology (IISB)

Annealing nanodiamonds(ND) at high temperatures up to 1700 ℃ is a common method to synthesize carbon onions. The transformation from NDs to carbon onions is particularly interesting because of carbon onions' potential in the field of tribology and their application in ultra-charge/discharge devices. In this paper, a novel surface-enhanced Raman scattering technique that involves coating the sample with nanoscopic gold particles is proposed to characterize the NDs after different annealing treatments. Conventional Raman and surfaceenhanced Raman spectra were obtained, and the changes of peak parameters as the function of annealing temperature were evaluated. It was found that the widths of the D and the G peaks decreased with increasing annealing temperature, reflecting an improved order in the sp^2-hybridized carbon during the transformation from NDs to carbon onions. After annealing at 1700 ℃, the sp^2?carbon was highly ordered, indicating desirable electrical conductivity and lubricity. With increasing annealing temperature, the D peak showed a blue shift of almost30 cm^(-1), while the G peak merely shifted by 5 cm^(-1). For annealing temperatures above 1100 ℃, an increase of intensity ratio ID/IGwas observed. Compared to the uncoated area, red shifts of 0.5-2 cm^(-1) and of 5-9 cm^(-1) for the G and D peaks, respectively, were detected for the gold-coated area, which was due to the coupling of the plasmons and the phonons of the samples.

关键词： Nanodiamonds Carbon onions Surface-enhanced Raman scattering LOPC mode

The dynamic Archean to Paleoproterozoic crustal evolution of Brazil:Preface

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2022年第5期13卷 106-109页

作者： Hugo Moreira mathias Schannor Kathryn Cutts Nick M.W.Roberts CNRS-UMR5243 Géosciences MontpellierUniversitéde MontpellierFrance Department of Earth Sciences University of CambridgeUK Department of Earth Sciences Freie Universität BerlinBerlinGermany Faculdade de Geologia Universidade do Estado do Rio de JaneiroBrazil Geological Survey of Finland P.O.Box 96FI-02151 EspooFinland Geochronology and Tracers Facility British Geological SurveyNottinghamUK

Brazil is the largest country in South America and contains the majority of the exposed Archean and Paleoproterozoic crust on the continent. As such, Brazil provides a natural laboratory for studies of the ancient Earth. In this Special Issue, contributions reflect the dynamic and protracted growth and reworking of former continents during a time frame of over a billion years, and depict how changes across the evolution of plate tectonics may have influenced the evolution of the interlinked crust-ocean-atmospheric Earth cycles over this period.

关键词： evolution Paleo Earth

Pharmacological manipulation of transcription factor protein-protein interactions:opportunities and obstacles

在线全文

学校读者我要写书评

暂无评论

Cell Regeneration 2015年第1期4卷 8-19页

作者： Frank Fontaine Jeroen Overman mathias François Division of Genomics of Development and Diseases Institute for Molecular BioscienceThe University of Queensland306 Carmody RoadSt LuciaQLD 4072Australia

Much research on transcription factor biology and their genetic pathways has been undertaken over the last30 years, especially in the field of developmental biology and cancer. Yet, very little is known about the molecularmodalities of highly dynamic interactions between transcription factors, genomic DNA, and protein *** breakthroughs such as RNA-seq (RNA-sequencing), ChIP-seq (chromatin immunoprecipitationsequencing), RIME (rapid immunoprecipitation mass spectrometry of endogenous proteins), and single-moleculeimaging will dramatically accelerate the discovery rate of their molecular mode of action in the next few *** a pharmacological viewpoint, conventional methods used to target transcription factor activity withmolecules mimicking endogenous ligands fail to achieve high specificity and are limited by a lack of identificationof new molecular targets. Protein-protein interactions are likely to represent one of the next major classes oftherapeutic targets. Transcription factors, known to act mostly via protein-protein interaction, may well be atthe forefront of this type of drug development. One hurdle in this field remains the difficulty to collate structuraldata into meaningful information for rational drug design. Another hurdle is the lack of chemical libraries meeting thestructural requirements of protein-protein interaction *** more attempts at modulating transcription factor activity are undertaken, valuable knowledge will be accumulatedon the modality of action required to modulate transcription and how these findings can be applied to developingtranscription factor drugs. Key discoveries will spawn into new therapeutic approaches not only as anticancer targetsbut also for other indications, such as those with an inflammatory component including neurodegenerative disorders,diabetes, and chronic liver and kidney diseases.

关键词： Transcription Screening Proteomics Interactome Pharmacology Specificity Cancer Genomics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

通过脱碳控制全球平均温度

物理化学学报 2021年第5期37卷 186-192页

作者： Frits mathias Dautzenberg 路勇徐彬 Serenix Corporation 5632 Coppervein StreetFort CollinsCO 80528USA 华东师范大学化学与分子工程学院上海市绿色化学与化工过程绿色化重点实验室上海200062 易高卓新节能技术(上海)有限公司上海201109

建立能可靠预测全球平均温度(T_(e))的方法,对于寻求政治和全球合作以及大量财政资源来推动CO_(2)减排至关重要。基于可预见的若干年内CO_(2)排放量不能显著降低这一假设,目前的气候模型似乎都预测T_(e)将会持续上升。然而,将大气中的CO... 详细信息

建立能可靠预测全球平均温度(T_(e))的方法,对于寻求政治和全球合作以及大量财政资源来推动CO_(2)减排至关重要。基于可预见的若干年内CO_(2)排放量不能显著降低这一假设,目前的气候模型似乎都预测T_(e)将会持续上升。然而,将大气中的CO_(2)作为多因素地球气候系统的唯一变量,来关联观察到的温度异常,很可能过于简单化了,因为大气中H_(2)O的存在是至少应该要考虑的。受控于太阳活动的大气H_(2)O含量是T_(e)的首要决定因素,其次才是与人类活动相关的CO_(2)排放,而CO_(2)排放将来可能降低。基于地球平均温度观测值和热力学数据,建立了新的预测模型。应用该模型方程,可以分析过去、当前和未来大气中CO_(2)和H_(2)O含量并可计算出相应的T_(e)。这是一个还未见公开报道的、更精确的模型。本模型预测,依据将较基准情景(business-as-usual,BAU),到2050年T_(e)可能上升至15.5°C;通过合理的绿色技术行动方案,T_(e)可能降至约14.2°C,预测未来30年CO_(2)可减排513千兆吨。绿色技术应用场景包括诸如各种CO_(2)减排行动,碳捕获,矿化以及生物碳生产等,其中至2050年CO_(2)减排的主要贡献将来自于电力、农业和运输行业。另外,也对更激进的Plausible和Drawdown方案进行了分析,预测未来30年CO_(2)可分别减排1051和1747千兆吨,但这些方案可能会减少全球粮食生产。要强调的是,全球变暖的成因和预测应该视为开放的科学问题,因为涉及与全球变暖相关的物理过程的多个问题仍然无解。例如,太阳活动耦合米兰科维奇(Milankovitch)循环扮演的角色就没有完全理解。还有,海洋对CO_(2)的吸收和火山活动等其他因素的影响,可能无法忽略。

关键词：全球平均温度计算方法大气CO_(2)含量大气H2O含量全球变暖 CO_(2)减排

Extending JASAG with data processing techniques for speeding up agricultural simulation applications:A case study with Simugan

在线全文

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2016年第4期3卷 235-243页

作者： mathias Longo Mauricio Arroqui Juan Rodriguez Claudio Machado Cristian Mateos Alejandro Zunino ISISTAN–CONICET.Tandil(B7001BBO) Buenos AiresArgentina Consejo Nacional de Investigaciones Cientı´ficas y Te´cnicas(CONICET) Argentina Facultad de Ciencias Veterinarias–UNICEN.Tandil(B7001BBO) Buenos AiresArgentina Agencia Nacional de Promocio´n Cientı´fica y Tecnolo´gica(ANPCyT) Argentina

Resource-intensive agricultural simulation applications have increased the need for gridification tools–i.e.,software to transform and scale up the applications using Grid infrastructures–.Previous research has proposed JASAG,a generic gridification tool for agricultural applications,through which the performance of a whole-farm simulation application called Simugan improved ***,JASAG still lacks proper support for efficiently exploiting Grid storage resources,causing significant delays for assembling and summarizing the generated *** this application note,two different data processing techniques in the context of JASAG are presented to tackle this *** was again employed to validate the benefits of these *** using data processing techniques show that the execution time of Simugan was accelerated by a factor of up to 34.34.

关键词： Agricultural simulation applications Grid Computing Gridification JASAG Data processing Simugan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

聚丙烯微孔膜表面修饰的葡聚糖固定化研究

高等学校化学学报 2005年第1期26卷 189-191页

作者：杨谦徐志康 mathias Ulbricht 浙江大学材料化工学院高分子科学研究所杭州310027 埃森大学化工研究所德国埃森45117

Aminoethyl methacrylate(AEMA) was grafted onto the polypropylene microporous membrane by photo-induced polymerization to immobilize dextran. XPS spectra confirmed the chemical change of the membrane surface after the graft polymerization of AEMA and the immobilization of dextran. The water contact angle measurement indicated that the hydrophilicity of the membrane surface can be increased reparably by the dextran immobilization.

关键词：聚丙烯微孔膜葡聚糖表面修饰

Microstructural morphology and visual acuity outcome in eyes with epiretinal membrane before,during,and after membrane peeling in intraoperative optical coherence tomography assisted macular surgery

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2023年第5期16卷 748-754页

作者： Melanie Weschta Moritz Pettenkofer Julian EKlaas Nikolaus Feucht Chris PLohmann mathias Maier Department of Ophthalmology Klinikum rechts der IsarTechnische Universität MünchenIsmaninger Str.22Munich 81675Germany Jules Stein Eye Institute University of California Los Angeles100 Stein Plaza DrivewayLos AngelesCalifornia 90095USA Department of Ophthalmology Ludwig-Maximilians-Universität MünchenMathildenstr.8Munich 80336Germany Smile Eyes Augenklinik Munich Airport Terminalstraße Mitte 18Munich 85356Germany

AIM:To measure the difference of intraoperative central macular thickness(CMT)before,during,and after membrane peeling and investigate the influence of intraoperative macular stretching on postoperative best corrected visual acuity(BCVA)outcome and postoperative CMT ***:A total of 59 eyes of 59 patients who underwent vitreoretinal surgery for epiretinal membrane was *** with intraoperative optical coherence tomography(OCT)were *** of intraoperative CMT before,during,and after peeling was ***-and postoperatively obtained BCVA and spectral-domain OCT images were ***:Mean age of the patients was 70±8.13y(range 46-86y).Mean baseline BCVA was 0.49±0.27 log MAR(range 0.1-1.3).Three and six months postoperatively the mean BCVA was 0.36±0.25(P=0.01 vs baseline)and 0.38±0.35(P=0.08 vs baseline)log MAR *** stretch of the macula during surgery was 29%from baseline(range 2%-159%).Intraoperative findings of macular stretching did not correlate with visual acuity outcome within 6mo after surgery(r=-0.06,P=0.72).However,extent of macular stretching during surgery significantly correlated with less reduction of CMT at the fovea centralis(r=-0.43,P<0.01)and 1 mm nasal and temporal from the fovea(r=-0.37,P=0.02 and r=-0.50,P<0.01 respectively)3mo ***:The extent of retinal stretching during membrane peeling may predict the development of postoperative central retinal thickness,though there is no correlation with visual acuity development within the first 6mo postoperatively.

关键词： retinal imaging treatment surgery intraoperative optical coherence tomography epiretinal membrane

Research on Impact of Brand on Buyers' Behavior in Benin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research on Impact of Brand on Buyers' Behavior in Benin

作者： MAHU WETIN HOUENALI mathias TOHO 合肥工业大学

学位级别：硕士

Midwives’ utilization of nonpharmacological pain relief measures for labor pain management: A descriptive cross-sectional study

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Integrative Nursing 2022年第2期4卷 76-82页

作者： Idang Neji OJONG Alberta David NSEMO mathias AGBA Department of Nursing Science Faculty of Allied Medical SciencesCollege of Medical SciencesUniversity of CalabarCross River StateNigeria

Objectives:This study sought to examine midwives’utilization of nonpharmacological pain relief measures in labor pain management and to test the relationship between midwives’knowledge and utilization of nonpharmacological pain relief measures for labor pain management in secondary health facility in Calabar,Cross River State,*** and Methods:A descriptive cross-sectional design was used for the *** study was rooted in Katherine Kolcaba’s Comfort ***,67 participants were recruited for the study using the purposive sampling technique.A self-made structured questionnaire was used to obtain participants’information on knowledge,utilization,and predictors of nonpharmacological pain relief ***:Although 41(61.2%)of the participants had knowledge about nonpharmacological pain relief measures,few did not know some of the cognitive-behavioral and environmental measures in labor pain *** was 35.8%(24/67)for utilization of cognitive-behavioral measures and 55.2%(37/67)for psychological/emotional measures for labor pain management by respondents,***(74.6%)of respondents agreed that predictors such as lack of knowledge,lack of updates and training,work experience,best practice guidelines,and equipment were hindrances to *** was statistically significance in relationship between the level of knowledge and utilization of nonpharmacological pain relief measures(r=0.6,P<0.05).Conclusion:The utilization of nonpharmacological measures for labor pain management is low,thus it is recommended that frequent education,training updates on effective labor pain management,provision of clinical guidelines on labor pain management,and enrichment of midwifery training curriculum are imperative to ensure quality labor pain management and positive health outcome.

关键词： Labor pain management midwives Nigeria nonpharmacological pain relief utilization