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Y3Fe5O12Prepared by mechanosynthesis from Different Iron Sources

Advances in materials Physics and Chemistry 2013年第1期3卷 41-46页

作者： Claudia A. Cortés-Escobedo Ana m. Bolarín-miró Félix Sánchez-De Jesús Raúl Valenzuela Elizabeth P. Juárez-Camacho Iván L. Samperio-Gómez Souad Ammar área Académica de Ciencias de la Tierra y materiales UAEH Hidalgo Mexico CIITEC Instituto Politécnico Nacional Mexico City Mexico Departamento de materiales metálicos y Cerámicos IIM UNAM Mexico City Mexico ITODYS UMR CNRS 7086 Université de Paris-Diderot Paris France

Yttrium iron garnet, Y3Fe5O12 (YIG) powders were synthesized by mechanochemical processing (mCP) from different iron sources (FeO, Fe2O3 and Fe3O4) mixed with Y2O3, followed by a heat treatment. The aim of this work is to demonstrate that mCP followed by annealing at very low temperatures (as compared with the classic solid state reaction) can induce the formation of nanostructured YIG. The effect of iron source on final structure was also studied. X-ray diffraction (XRD) and scanning electron microscopy (SEm) were used to characterize the synthesized powders. The precursors mixed in a stoichiometric ratio to obtain YIG were milled at room temperature in a shaker mixer mill with a ball:powder weight ratio of 10:1. A partial synthesis of YIG was achieved after 9 h of milling time by using the three sources of iron;however, a significant fraction of the product was the perovskite YFeO3. The largest yield of YIG was obtained by using FeO. In all cases a single garnet phase could only be completely obtained after an annealing process at 900?C, around 400?C lower than the typical temperatures to prepare the material by solid state reaction. An analysis of the microstrain and lattice parameters associated with peak displacements is discussed.

关键词： mechanochemistry YIG Annealing Iron Garnet

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modelling and Simulating Biological Process of Liver Spheroid Formation

Modelling and Simulating Biological Process of Liver Spheroi...

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第二十四届中国控制会议

作者： Zhang H.J.~1, Zhu Q.m.~(1*), Xu J.~2, A..Pipe~1, W. m. Purcell~2, and Chen J.~3 (1. Faculty of Computing, Engineering and mathematical Sciences, arbour Lane, Bristol, BS161QY, UK )(2. Faculty of Applied Science, University of the West of England, Frenchay Campus Coldharbour Lane, Bristol, BS161QY, UK ) (3. school rmation, Beijing Institute of Technology, No.5 South Zhongguancun Street, Haidian District, Beijing 100081, China)

＜正＞ Liver spheroid formation is a process to culture single cells into three-dimensional spherical structures. There are several factors such as gyrotatory speed of the cell shaker, cell density, volume of medium etc that are key criteria in spheroid formation. Traditional approaches have been adopted to undertake experiments to determine optimal conditions for spheroid studies. If the process of spheroid formation can be fitted to a mathematical model, it will be helpful to improve spheroid culture by computerized simulation. This insight provides a strong indication of the necessity for modelling of the spheroid development behaviour, with systematic descriptions of the whole dynamic process. It is considered that this type of computational biology can offer a significant contribution to experimental design, prediction of culture progression, and so on. This is relevant to furthering our understanding of the dynamics of spheroid culture relevant to scale-up of production to meet demand for spheroids in applied research.

关键词： liver spheroids rotation mediated culture unbounded models bounded models.

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预防性吞咽训练对晚期头颈癌同期放化疗患者吞咽功能的重要保护作用

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中国口腔颌面外科杂志 2014年第6期 542-542页

作者： Ohba S Yokoyama J Kojima m

吞咽困难是头颈癌患者同期放化疗后常见的并发症,约20%;0%的患者需要通过鼻饲解决。该文旨在评估预防性吞咽训练对晚期头颈癌同期放化疗患者吞咽功能的作用。对纳入样本的51例晚期口咽癌患者随机分组,21例接受shaker训练,30例接受传统的... 详细信息

吞咽困难是头颈癌患者同期放化疗后常见的并发症,约20%;0%的患者需要通过鼻饲解决。该文旨在评估预防性吞咽训练对晚期头颈癌同期放化疗患者吞咽功能的作用。对纳入样本的51例晚期口咽癌患者随机分组,21例接受shaker训练,30例接受传统的mendelsohn练习（对照组）。治疗前后,对视频透视检查结果和吞咽运动方式进行分析,获得舌骨、喉的运动评分。结果,舌骨、喉的平均运动时间更短,shaker组食管开放时间更长、更稳定,误吸指数明显降低。鼻饲流食比例shaker组和对照组分别为

关键词：头颈癌同期放化疗吞咽训练吞咽功能保护作用预防性患者

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