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An impact of sintering temperature and doping level on structural and spectral properties of Eu-doped strontium aluminium oxide

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journal of Rare Earths 2011年第12期29卷 1105-1110页

作者： R.j.Wiglusz T.Grzyb A.Watras P.j.Deren S.lis W.Strek Institute for Low Temperature and Structure Research Polish Academy of Sciences Department of Rare Earths Adam Mickiewicz University

In the present work, a sol-gel method was employed to prepare nanosized SrAl2O4 powders doped with Eu3＋ions. The raw nano- materials were thermally treated at 900 to 1100℃ for 3 h. The XRD analysis demonstrated that the powders were single-phase nanopowders with high crystallite dispersion. Our studies were focused on relating the luminescence properties of the Eu^3＋ dopant to the NC （nanocrystallites） size. This was achieved by varying the calcinations temperature between 900 and 1100 ℃. The average NC size varied accordingly between -36 and -75 nm. We found that size effect manifested mainly in the expansion of the cell volume and broadening of XRD peaks as indicated by Rietveld analysis. Moreover the emission and excitation spectra, although typical for Eu^3＋ ions, demonstrated some degree of variability with calcinations temperature and doping concentration. To explain these differences a detailed analysis of luminescence spectra by the judd-Ofelt theory was performed.

关键词： photoluminescence SrAl2O4 spinel powders Eu^3+ doping nanocrystallites sol-gel method rietveld analysis judd-Ofelt theory rare earths

Endovascular treatment in anterior circulation stroke beyond 6.5 hours after onset or time last seen well:results from the MR CLEAN Registry

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Stroke & Vascular Neurology 2021年第4期6卷 572-580,I0037-I0048页

作者： Luuk Dekker Esmee Venema F Anne V Pirson Charles B L M Majoie Bart j Emmer Ivo G H jansen Maxim j H L Mulder Robin Lemmens Robert-jan B Goldhoorn Marieke j H Wermer j.lis boiten Geert j LycklamaàNijeholt Yvo B W E M Roos Adriaan C G M van Es Hester F Lingsma Diederik W j Dippel Wim H van Zwam Robert j van Oostenbrugge Ido R van den Wijngaard on behalf of the MR CLEAN Registry investigators Neurology Leiden University Medical CentreLeidenThe Netherlands Neurology Erasmus MCRotterdamThe Netherlands Public Health Erasmus MCRotterdamThe Netherlands Neurology Maastricht University Medical Centre+MaastrichtThe Netherlands Radiology and Nuclear Medicine Amsterdam University Medical CentreLocation AMCAmsterdamThe Netherlands Neurology University Hospitals LeuvenLeuvenBelgium Neurosciences Experimental Neurology and Leuven Brain InstituteUniversity of LeuvenLeuvenBelgium VIB Center for Brain&Disease ResearchLaboratory of NeurobiologyLeuvenBelgium Neurology Haaglanden Medical CentreDen HaagThe Netherlands Radiology Haaglanden Medical CentreDen HaagThe Netherlands Neurology Amsterdam University Medical CentreLocation AMCAmsterdamThe Netherlands Radiology Leiden University Medical CentreLeidenThe Netherlands Radiology Maastricht University Medical Centre+MaastrichtThe Netherlands

Background Randomised controlled trials with perfusion selection have shown benefit of endovascular treatment(EVT)for ischaemic stroke between 6 and 24 hours after symptom onset or time last seen ***,outcomes after EVT in these late window patients without perfusion imaging are largely *** assessed their characteristics and outcomes in routine clinical *** The Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands Registry,a prospective,multicentre study in the Netherlands,included patients with an anterior circulation occlusion who underwent EVT between 2014 and *** perfusion was no standard imaging *** used adjusted ordinal logistic regression analysis to compare patients treated within versus beyond 6.5 hours after propensity score matching on age,prestroke modified Rankin Scale(mRS),National Institutes of Health Stroke Scale,Alberta Stroke Programme Early CT Score(ASPECTS),collateral status,location of occlusion and treatment with intravenous *** included 3-month mRS score,functional independence(defined as mRS 0-2),and *** Of 3264 patients who underwent EVT,106(3.2%)were treated beyond 6.5 hours(median 8.5,IQR 6.9-10.6),of whom 93(87.7%)had unknown time of stroke *** perfusion was not performed in 87/106(80.2%)late window *** window patients were younger(mean 67 vs 70 years,pjusted common OR for 1 point improvement in mRS 1.04,95%CI 0.56 to 1.93).Conclusions Without the use of CT perfusion selection criteria,EVT in the 6.5-24-hour time window was not associated with poorer outcome in selected patients with favourable clinical and CT/C

关键词： treatment beyond Registry

POLYGENETIC MINERALIZATION OF THE EARLY PROTEROZOIC TONGKUANGYU METAPORPHYRY COPPER DEPOSIT IN THE ZHONGTIAO MOUNTAINS OF CHINA

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Geotectonica et Metallogenia 1996年第Z1期20卷 110-111页

作者： ChenW.M. ZhangC.X. Luj.R. DangZ.F. lis.P. CaiW.B. NingY.andCaoY.j. Inst. of Min.Dep.Chin.Acad.of Geol.Sci.26 BaiwanzhuangBeijing100037China Shanxi Institute of Geology Taiyuan Shanxi China

The Tongkuangyu porphyry copper deposit in the Zhongtiao Mountains, China, is tectonically located on the southern margin of the North China platform and on the northern margin of the Late Archean Zhongtiaoshan intracontinental rift basin. The deposit occurs in a copper-bearing formation of tuffaceous variegated sandshale-K-rich bimodal volcanic rocks of the Tongkuangyu Formation of the Late Archean jiangxian Group, and the orebodies are localized in a transition portion between tuffaceous variegated sandshale and bimodal volcanic rocks. The host rocks consist mainly of metagranodiorite-porphyry, meta-quartz monzonite-

关键词： volcanic quartz margin portion localized

美国黑石河有机污染物输送入海的一维水质模式研究

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海洋与湖沼 1991年第1期22卷 44-49页

作者：郑金树 j.G.Quinn C.G.Carey j.T.E1lis 国家海洋局第三海洋研究所厦门361005 美国罗得岛大学海洋研究生院

沿着黑石河沿岸城镇和废物处理场设九个取样站,于1985年夏秋取样三次。在分析和统计的基础上提出黑石河有机污染物一维水质模式,指出黑石河有机污染物的来源、输送和归宿。

关键词：墨石河有机污染物入海水质模式

Electrospun PLLA Membranes for Caffeine Delivery: Diffusional Approach

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journal of Biomedical Science and Engineering 2017年第12期10卷 563-574页

作者： Ana Paula S. Immich josé Antonio Tornero Francesc Cano Casas Manuel j. lis Arias Institut d’Investigació Tèxtil i Cooperació Industrial de Terrassa Universitat Politècnica de Catalunya Terrassa Spain Chemical Engineering Department Universitat Politècnica de Catalunya Terrassa Spain

One of the great advantages of electrospun fibers is the large tridimensional area produced, capable of storing any type of material. The aim of our investigation is to study the electrospinning technique to produce polymer membranes for drug delivery applications, given their large surface area and ability to transport a bioactive compound. A mathematical modeling of the delivery system kinetics was also studied to find the mechanism that controls the releasing process. Results showed that electrospinning could provide regular and smooth membranes suitable for drug delivery processes. The mathematical modeling also proved that thicker PLLA membranes exhibited a Fickian diffusion behavior during the drug transport, presenting better control in drug delivery processes.

关键词： Diffusion Polymer Nano Escale Kinetics

用燃烧合成的粉末无压烧结致密的β—和...

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国外建材译丛 1992年第2期4卷 27-32页

作者：徐建荣 lis,j

Production and Evaluation of Antimicrobial Microcapsules with Essential Oils Using Complex Coacervation

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journal of Biomedical Science and Engineering 2019年第8期12卷 377-390页

作者： A. López M. j. lis F. Maesta Bezerra M. Vilaseca B. Vallés R. Prieto M. Simó INTEXTER-UPC Barcelona Spain Department of Textile Engineering Federal Technological University of Paraná Apucarana Brasil

Nowadays, the needs and requirements to avoid infections during surgical operations, require to be more imaginative than ever. The one-use textiles substrates that are used in hospitals can be, also, a way to transport the antibacterial effect around the own building. This is the main objective of this work;to use clothes and textiles surfaces as antibacterial systems using natural components. Microencapsulation has shown in several occasions the effectivity to protect and vehiculize active principles that can be used for medical treatments. In this case, essential oils have been used as antimicrobial agent, that when combined with shell polymers based on Chitosan of different molecular weight distribution and Arabic gum, allows them to act against Gram (+) and Gram (−) bacteria. The study of the efficiency of all the samples made gave a high value due to its character similar to hydrogels, while the determination of solids was higher when it was a question of samples made with a low molecular weight. The essential oil used has a very volatile character formed by more than 40 components and with the help of FT-IR and TGA it has been possible to corroborate that all its components were encapsulated. The impregnation of the different samples to the tissue was successful and allowed the antibacterial study to be carried out, which was carried out in duplicate on each sample and demonstrated that they have bacterial activity.

关键词： Microcapsules Antimicrobial Biofunctional Textiles

New views of local and genome-wide transcription regulation in vivo

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New views of local and genome-wide transcription regulation ...

Influence of glycosylation and oligomerization of vaccinia virus complement control protein on level and pattern of functional activity and immunogenicity

21st IUBMB and 12th FAOBMB International Congress of Biochemistry and Molecular Biology

作者： Martin Buckiey Leighton j.Core john T.lis Irene M.Min Robert j.Munroe Steven Petesch john Schimentl joshua j.Waterfall Katle Zobeck Department of Molecular Biology and Genetics Biotechnology BuildingCornell UniversityIthacaNY 14853USA Center for Vertebrate Genomics Cornell UniversityCollege of Veterinary MedicineIthacaNY 14853USA

＜正＞We are using both gene-focused and genome-wide analyses to assess the mechanisms of gene activation in Drosophila and mouse systems,1) Our gene-focused studies in Drosophila examine by both optical and biochemical approaches the mechanisms of activation of heat shock genes and the accompanying dramatic changes in chromatin structure in *** Drosophila

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Protein & Cell 2010年第12期1卷 1084-1092页

作者： Girish j.Kotwal Department of Pharmaceutical Sciences Sullivan University College of PharmacyLouisvilleKYUSA

Vaccinia virus complement control protein(VCP)is one of the proteins encoded by vaccinia virus to modulate the host inflammatory *** modulates the inflammatory response and protects viral habitat by inhibiting the classical and the alternative pathways of complement *** extended structure of VCP,mobility between its sequential domains,charge distribution and type of residues at the binding regions are factors that have been identified to influence its ability to bind to complement *** report that a lister strain of vaccinia virus encodes a VCP homolog(lis VCP)that is functional,glycosylated,has two amino acids less than the well-characterized VCP from vaccinia virus WR strain(WR VCP),and the human smallpox inhibitor of complement enzymes(SPICE)from variola *** glycosylated VCP of lister is immunogenic in contrast to the weak immunogenicity of the nonglycosylated *** VCP is the only orthopoxviral VCP homolog found to be glycosylated,and we speculate that glycosylation influences its pattern of complement *** also correlate dimerization of VCP observed only in mammalian and baculovirus expression systems to higher levels of activity than monomers,observed in the yeast expression system.

关键词： vaccinia virus complement glycosylation oligomerization structure-function immunogenicity