Characterisation of vascularisation of scaffolds for tissue engineering

Abstract

Vascularisation of scaffolds is now recognised as a crucial requirement for the success of tissue engineering strategies. This review summarises the state-of-the-art in the techniques available for the in vivo assessment of vascularisation of scaffolds with focus on growth factor delivering scaffolds, microfabrication technologies and in vivo characterisation methods based on the arteriovenous loop model to create three dimensionally vascularised tissue replacements.     

茶多酚对精炼菜籽油的抗氧化作用

以“绿宝牌”茶多酚为主要成分，配制纯天然油脂抗氧化剂，应用于高级精炼菜籽油中，并同复合合成抗氧剂、α─生育酚和充氮气比较，用国标法测定油脂的过氧化值和酸值，结果证明使用量相同的条件下（０．０３％），茶多酚抗氧化剂远优于复合合成抗氧剂，能延长精炼菜籽油的保质期（ＰＯＶ≤１０ｍｅｑ／ｋｇ）三倍以上，而充氮和使用α─生育酚无明显效果。     

Homeplug AV over Coax系统设计

设计了一种基于Homeplug AV技术利用家用同轴电缆实现家庭HFC网的双向接入设备.介绍了整个系统的设计思路,并对Homeplug AV over Coax设备进行了测试,包括衰减、设备组网、网络节点、传输帧的大小对整个系统的吞吐量、延时的影响,得出其性能要比电力线上用好得多,并对Homeplug AV over Coax的应用前景作了分析.     

采用COM技术定制音视频通信系统

基于Windows平台，采用面向对象编程技术，通过调用Microsoft NetMeeting开发包提供的COM组件接口函数，实现了一个多媒体网络音视频通信系统。系统具有开发周期短、集成方式灵活、运行速度快、占用带宽少、兼容性好等诸多优点。     

Effects of α-Tocopherol on Oxidative Stability and Phytosterol Oxidation During Heating in Some Regular and High-Oleic Vegetable Oils

The first part of this study evaluated oxidative stability in high-oleic rapeseed oil, palm olein, refined olive oil, low erucic acid rapeseed oil and sunflower oil. The results showed oxidative stability in the order: palm olein > high-oleic rapeseed oil > refined olive oil > low erucic acid rapeseed oil > sunflower oil, as determined by the Rancimat method. Addition of α-tocopherol at high levels of up to 0.2% increased the oxidative stability of refined olive oil, whereas the opposite effect was generally observed in the other oil samples. In the second part of the study, high-oleic rapeseed oil, palm olein, refined olive oil and refined olive oil containing 0.2% α-tocopherol were heated for 3, 6, 9 and 12 h at 180 °C. The peroxide and p-anisidine values generally increased over time in the samples, including olive oil containing 0.2% α-tocopherol. High-oleic rapeseed oil contained the highest amount of total sterols and total phytosterol oxidation products (POPs), but during heating the total POPs content increased moderately (~10%), in contrast to the threefold increase after 12 h of heating in palm olein and refined olive oil. Very high levels of 6-hydroxy derivatives of brassicastanol, campestanol and sitostanol and of 7-ketobrassicasterol were observed in high-oleic rapeseed oil samples. Addition of 0.2% α-tocopherol during heating significantly decreased POPs formation in refined olive oil (P < 0.05).     

行人与自动驾驶汽车的交互研究

从行人-汽车-环境系统视角出发,探索道路交通系统中行人安全设施、自动驾驶汽车让行行为、驶近方向以及外部人机界面(eHMI)等因素对行人与自动驾驶汽车交互过程的影响。基于洞穴式自动虚拟环境(CAVE)仿真平台,使用Unity 3D软件设计、开发了自动驾驶汽车的驾驶场景,招募38名志愿者参与行人与自动驾驶汽车交互实验,并记录交互过程中行人的决策时间、决策结果和交互体验等数据。利用生存分析对38名行人被试的实验数据进行了统计学分析,结果表明：在有自动驾驶汽车的交通环境中,行人安全设施、自动驾驶汽车的让行行为和eHMI能够显著缩短行人决策时间、提升交互体验、提高交通效率。但行人安全设施对行人决策与行为的影响主要体现在过街间隙出现的早期,汽车让行行为的影响相对滞后,同时光带式eHMI用于传达自动驾驶汽车让行意图的效力和清晰度有限。     

HomePlug AV over Coax系统设计

本文设计了一种利用家庭内部现有的传输介质(同轴电缆)、基于HomePlug AV技术实现家庭HFC网的双向接入的设备.文中介绍了从原理框图设计到整个系统的设计思路,并对Home Plug AV over Coax设备进行了测试,主要测试了衰减、设备组网、网络节点、传输帧的大小对整个系统的吞吐量、延时的影响,得出它的性能要比电力线上好得多.     

AV TFT-LCD显示驱动的影响行为分析

AV TFT-LCD的显示效果和驱动因素密切相关。本文在对AV TFT-LCD的驱动机理论述后,分析研究了VCOM、VGH和VGL、DCLK、HSYNC和VSYNC、DE等各驱动信号对AV图像显示效果的影响行为,并提出了得到最佳显示效果的解决方案,对TFT-LCD的良好应用具有重要的参考意义与实用价值。     

HomePlug AV电力线调制解调器设计与实现

本文介绍了电力线上网的技术.详细说明如何用INTELLON公司的INT6300设计一个200Mbps,符合HomePlug AV标准的电力线调制解调器,以及此电力线调制解调器的功能,特性和用法.     

从配价理论看“N1是AV的N2”结构的歧义生成

从以往研究中可以发现,“N1是AV的N2”结构有些时候会存在歧义现象。以配价理论为基础,论证这类句子歧义的生成大多是由两种原因造成：一种是由于中心动词和与其共现的配价名词之间出现了复杂的语义关系;另一种是由于中心动词和隐省的配价名词之间出现了复杂的语义关系。