Teaching for adaptive expertise in biomedical engineering ethics

This paper considers an approach to teaching ethics in bioengineering based on the How People Learn (HPL) framework. Curricula based on this framework have been effective in mathematics and science instruction from the kindergarten to the college levels. This framework is well suited to teaching bioengineering ethics because it helps learners develop “adaptive expertise”. Adaptive expertise refers to the ability to use knowledge and experience in a domain to learn in unanticipated situations. It differs from routine expertise, which requires using knowledge appropriately to solve routine problems. Adaptive expertise is an important educational objective for bioengineers because the regulations and knowledge base in the discipline are likely to change significantly over the course of their careers. This study compares the performance of undergraduate bioengineering students who learned about ethics for stem cell research using the HPL method of instruction to the performance of students who learned following a standard lecture sequence. Both groups learned the factual material equally well, but the HPL group was more prepared to act adaptively when presented with a novel situation.     

脂肪干细胞复合脂肪颗粒促血管化的实验研究

本研究探讨脂肪干细胞复合脂肪颗粒对裸鼠皮下血管化的影响。将12只裸鼠身上标记三个点,将三组试剂分别注射,分析结果如下：肉眼观察：取材时,裸鼠背部注射部皮下有一团状组织块,脂肪组织形状不规则,大小不一。微血管密度：A组明显高于B组、C组,且差异有统计学意义（P〈0．01）;B组明显高于c组,且差异有统计学意义（P〈0．01）。存活率比较：A组明显高于B组、C组,且差异有统计学意义（P〈0．01）;B组明显高于C组,且差异有统计学意义（P〈0．01）。脂肪颗粒作为生物支架可加速脂肪干细胞的促血管化作用,从而促进移植物的存活与生长。     

Evolutionary Pluralism: A New System of Systems Philosophy

When Darwin wrote his ‘On the origin of species…” (1859) he focused on evolution as a property of living organisms in interaction with abiotic and biotic elements in the world. This viewpoint is still dominant amongst biologists. For particle physicists and cosmologists evolution refers to a larger scale, ranging from quarks and atoms to galaxies, stars and planets (i.e. Pagels 1985, Hawking 1988). To close the gap between such different viewpoints, a wide range of perspectives on an interdisciplinary understanding of system development has been published (i.e. Teilhard de Chardin 1966, von Bertalanffy 1968, Varela 1979, Prigogine and Stengers 1984, Laszlo 1996). As an integrative concept, the construction of nature from a hierarchy of system layers forms a central tenet in general system research and the stepwise construction of this layered hierarchy can be regarded as an interdisciplinary evolution theory. Surprisingly, the literature offers no unequivocal rules to recognise a multilayer hierarchy in nature. This presents an obstacle for interdisciplinary approaches to evolution.

Searching a solution to part of the above hierarchy problem, the present paper is dedicated to the analysis of a special kind of layering in natural systems, which is based on transitions between ‘building block’ systems. To identify these building blocks, and the transitions from building block x at level A, to building block y at level B, the focus of this study is further limited to ‘hypercydic dynamics’ and ‘containment’. On the basis of these criteria, a hierarchy is created which shows no possibilities for ‘bypasses’. It connects hadrons to atoms, atoms to cells, and cells to neural networks. Implications of this hierarchy for system studies and evolution are discussed.     

Dissociating word stem completion and cued recall as a function of divided attention at retrieval

The aim of this study was to investigate the widely held, but largely untested, view that implicit memory (repetition priming) reflects an automatic form of retrieval. Specifically, in Experiment 1 we explored whether a secondary task (syllable monitoring), performed during retrieval, would disrupt performance on explicit (cued recall) and implicit (stem completion) memory tasks equally. Surprisingly, despite substantial memory and secondary costs to cued recall when performed with a syllable-monitoring task, the same manipulation had no effect on stem completion priming or on secondary task performance. In Experiment 2 we demonstrated that even when using a particularly demanding version of the stem completion task that incurred secondary task costs, the corresponding disruption to implicit memory performance was minimal. Collectively, the results are consistent with the view that implicit memory retrieval requires little or no processing capacity and is not seemingly susceptible to the effects of dividing attention at retrieval.     

神经营养素3在小儿哮喘中表达的临床意义

神经营养素3（NT-3）参与了神经系统的发育和功能发挥.最近研究发现它在呼吸系统疾病,尤其是哮喘的发病中也发挥重要作用.本课题采用酶联免疫吸附实验（ELISA）检测哮喘各组和正常对照组血清中NT-3的表达水平;用NT-3体外刺激正常人外周血单核细胞（PBMC）,采用ELISA法检测培养上清中IL-6和TNFα的表达水平.结果显示,与对照组相比,在哮喘组血清中NT-3的表达水平明显增高;并且它在哮喘发作期和缓解期中的表达量也要高于正常组;另外,NT-3可以显著促进PBMC分泌IL-6和TNFα.以上结果提示,可以将NT-3在小儿哮喘患者血清中的表达水平作为诊断病变过程的标记物,并且NT-3在维持气道高反应性方面也起到一定作用.     

骨髓捐献人中途拒捐的民事责任探析——基于信赖保护的视角

基于捐献行为的公益性、单务性和人身性,各国法律赋予捐献人任意撤销权,但是出于对捐献人允诺的信赖而改变自身处境的接受人利益也应该得到保护.从信赖保护的视角出发,在血型高分辨检测之前,捐献人一旦签订了捐献协议,即负有保护接受人信赖利益的义务,捐献人虽然有权中途拒捐,但应当承担信赖赔偿责任.     

De l’interdiction de la recherche sur l’embryon et les cellules souches au régime d’autorisation sous condition : brèves remarques sur la protection de la vie humaine dans la loi no 2013-715 du 6 août 2013

The publication in the Official Journal of Law No. 2013-715 of August 6th 2013 which authorizes under conditions embryos and embryonic stem cells research is a milestone in the legal and ethical field in France. Indeed, the new Article L. 2151-5 of the Public Health Code replaces the prohibition regime of embryos and embryonic stem cells research by an authorization regime, which raises the question of the value and the protection of embryonic life in French law.     

脂肪源性干细胞（ADSCs）在美容整形外科应用的基本概念

近来,干细胞作为一种利用最大自疗能力的治疗方法在医学领域得到了迅速发展。很多文献报道,利用脂肪源性干细胞（ADSCs）进行自体脂肪细胞移植在提高脂肪移植的成活率和持续性方面,取得了良好的效果,并越来越受欢迎。目前,干细胞的功能尚没有完全阐明,后续关于干细胞的研究使其内容随时发生变化的可能性是存在的。但是干细胞和 ADSCs 的基本概念需要每一位整形美容外科医生掌握。本文将主要介绍当前干细胞和脂肪源性干细胞的一些基本概念。     

软骨细胞和骨髓间充质干细胞相关基因转染的研究进展

由于关节软骨主要是由软骨细胞和周围的外基质组成的无血管组织,损伤后自我修复能力比较弱,利用基因转染技术治疗软骨损伤性疾病是基因工程研究的重点,而软骨细胞和骨髓间充质干细胞（BMSCs）是基因转染技术中最主要和最常用的种子细胞,与之相关的基因转染的研究也是目前研究的热点。本文拟就与软骨细胞和BMSCs相关的基因转染方面（包括病毒载体、单基因转染和多基因转染）取得的成果和最新研究进展作一综述。     

干细胞治疗的系统观

当前干细胞治疗面临着不少的技术难关和争议,需要运用现代系统论观点,从患者的整体上确定治疗目标,摸索出各种疾病所需的最佳干细胞类型和输注数量、最佳治疗时机、最佳输注途径,以发挥最佳效果。