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| 1 | Bilirubin injury to neurons:contri-bution of oxidative stress and rescue by glycoursodeoxycholic ac-id显示文摘 | Brito M.A S.Lima A.Fernandes A.S.Falcao R.F.Silva D.A.Butterfield D.Brites | | 0，，02： | 1 |
| 2 | Detection and compensation of switch faults in a three level inverter显示文摘 | Edison R.da silva Wellington S.Lima | | 0，，01： | 1 |
| 3 | YbF_3/SiO_2 Fillers as Radiopacifiers in a Dental Adhesive Resin显示文摘The objective of this study was to evaluate the effect of functionalizing a dental adhesive resin with YbF_3/SiO_2 fillers for use as radiopacifiers.Particles of YbF_3/SiO_2 were obtained with the high-energy mechanical milling method and characterized by both physical and chemical methods.After characterization,the particles were sieved and silanized prior to being incorporated into an adhesive resin.The stability of the particle suspension was then evaluated.After light activation,the radiopacity,degree of conversion,flexural strength and elastic modulus were determined.The dental adhesive resins with 10 and 15 wt% of filler provided satisfactory radiopacity,while flexural strength and elastic modulus were not affected.The degree of conversion was statistically lower than that of the control(p<0.05).The method used for incorporating the tested ytterbium fluoride/silicon dioxide particles at concentrations of 10 and 15 wt% was shown to be feasible for the development of a radiopaque dental adhesive system. | Neftali L.V.Carreno Thiago C.S.Oliveira Evandro Piva Fernanda B.Leal Giana S.Lima Marcelo D.Moncks Cristiane W.Raubach Fabricio A.Ogliari | 2012 | Nano-Micro Letters2012，4，3： | 1 |
| 4 | 通过凝固冷却速率调整Zn-1Mg-(0.5Mn,0.5Ca)合金的显微组织和显微硬度显示文摘生物可降解锌基合金,特别是添加合金元素的锌-镁(Zn-Mg)合金,已获得广泛研究以改善其力学性能和腐蚀性能。由于这些性能主要依赖于合金的显微组织,因此任何评价都应该从了解影响其形成的条件开始。本研究旨在探讨凝固冷却速率对Zn-1Mg-(0.5Ca, 0.5Mn)(质量分数,%)合金瞬态凝固过程中显微组织演化的影响。结果表明,两种合金的显微组织均含有3种相:η-Zn枝晶基体、Zn11Mg2金属间化合物和低共熔混合物中的Zn2Mg。MnZn9和两种含Ca相(CaZn11和CaZn13)分别与Mn和Ca的添加有关。与Zn-1Mg(质量分数,%)合金相比,添加Mn和Ca元素可以细化枝晶基体和低共熔混合物。建立冷却速率、枝晶间距或共晶间距之间的关系,从而提出实验生长规律。此外,为了研究添加Ca和Mn的效果,进行硬度测试。维氏显微硬度与二次枝晶间距之间的实验相关性表明,与二元合金相比,显微组织细化和典型的Ca、Mn基金属间化合物是导致硬度增加的主要原因。 | Talita A.VIDA Cássio A.P.SILVA Thiago S.LIMA NoéCHEUNG Crystopher BRITO Amauri GARCIA | 2021 | Transactions of Nonferrous Metals Society of China2021，31，4： | 0 |
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