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排序方式: 共有128条查询结果,搜索用时 31 毫秒
41.
诱导多能干细胞(induced pluripotent stem cells,iPSCs)是通过向分化的体细胞转入特定的外源转录因子进行重编程,从而获得具有自我更新能力和多能性的细胞.iPSCs具有形成体内所有细胞类型的潜能,尤其是能以患者自身体细胞制备iPSCs,可用于特定疾病的治疗,规避了异体移植引发的免疫排斥风险以及伦理和法律冲突等问题,在基础研究和临床应用都有广阔的应用前景.目前,在重编程体细胞为iPSCs的过程中,由于细胞来源不同,所采用的基因组合以及转基因方式各不相同,获得的iPSCs具有潜在的致癌性等安全隐患,导致iPSCs的临床应用面临新的生命伦理挑战.  相似文献   
42.
SUMMARY

This paper describes die usual course of discovered marital infidelity and its predictable posttraumatic reaction. It contrasts this phenomenon with situations in which the initial reaction to discovery is suppressed, leading to a delayed traumatic reaction. It concludes with suggestions for the treatment of a delayed traumatic reaction, and suggestions designed to sensitize therapists to the possibility of a suppressed reaction to marital infidelity as a possible underlying issue in individual or couples therapy.  相似文献   
43.
朱亮  卢畅  王爽  曾红 《心理科学进展》2017,(7):1139-1144
成瘾记忆消退致力于消除成瘾者相关线索与药物奖赏效应的联结,以达到消除心理渴求、戒断成瘾行为的目的,但其效果还十分有限。最近,大量的动物和人类实验研究发现:在相关线索下,成瘾者的激活脑区不仅包括中脑边缘皮层-背内侧纹状体,还延伸到感觉运动脑区-背外侧纹状体。这意味着成瘾记忆中存在相关线索与自动化(习惯性)用药行为的联结。所以,与成瘾相关的记忆可能包含两种不同的成分:一是与药物奖赏效应相关的情绪记忆,另一种是与用药动作、技能有关的动作记忆(程序记忆)。由于在成瘾阶段,药物奖赏效应对药物使用和复发的作用已经相对减少,因此,针对成瘾记忆的消退训练,以相关线索与自动化用药行为的联结为标靶,可能可以取得更好的效果,值得做进一步的深入探索。  相似文献   
44.
This paper draws upon a number of official, semi-official and other public texts related to the current views of the Russian Church on social and political issues. Overall, in spite of a variety of opinions and nuances, a certain mainstream becomes apparent, as expressed through this body of texts. The most discussed topics include moral values related to the human body (such as abortion, euthanasia, reproductive technologies and sexuality) and issues such as blasphemy, juvenile courts and new technologies of personal registration for Russian citizens. ‘Traditional morality’ has become the signature discourse of the Russian Orthodox Church which is attempting to construct ‘tradition’ by drawing upon a partly imagined ethos of imperial Russia and the late Soviet Union. Traditional family values are central to the church’s rhetoric. The authors of these texts see a presumed decay of traditional values as the main danger that must be opposed. They usually trace the source of this danger directly to the contemporary West. By contrast, they see Russia as a protective shield against these global influences. Either consciously or involuntarily, they translate their religious language of traditional morality into a political rhetoric of solidarity and patriotism. Such ideological rhetoric has direct political implications and analogies in the agenda of Putin’s regime. This Russian appeal to ‘traditional values’, both religious and political, has recently acquired an extraordinary international relevance.  相似文献   
45.
Is the question ‘will you regret it if you do (not do) this?’ helpful when people face difficult life decisions, such as terminating a pregnancy if a disability is detected or deciding to become a parent? Despite the commonness of the question in daily life, several philosophers have argued lately against its usefulness. We reconstruct four arguments from recent literature on regret, transformative experience and the use of imagination in deliberation. After analysis of these arguments we conclude that the prospect of regret remains a useful deliberative heuristic, provided four conditions are fulfilled. If the prospect of (the absence of) regret is arrived at via reflection on one’s values, in a non-coercive context, when well-informed about factual circumstances, and in a process of self-commitment, the question of what one will regret is a helpful device to get in touch with one’s deepest concerns that give reasons to act in a particular way.  相似文献   
46.
近代生殖免疫学研究认为,正常妊娠维持有赖于母胎免疫耐受的形成,耐受一旦失调,就可能妊娠失败,发生如流产,妊娠期高血压疾病,胎膜早破,分娩发动等。近几年来,国内外学者逐渐认识到CD4+CD25+调节性T细胞在妊娠中的重要作用并进行系列研究。本文就目前CD4+CD25+调节性T细胞在妊娠与分娩中的作用作一综述。  相似文献   
47.
人工流产手术室(以下称人流室)的安全管理隐患直接导致人工流产术意外的发生,本文作者从多方面剖析了人流室安全管理隐患发生的原因,同时针对人流室的安全管理隐患如何有效防范提出了诸多解决措施,最后就目前人流室工作中存在的一些不足进行了必要的思考。  相似文献   
48.
Abstract: In this article I focus on some of Joseph Margolis's contributions to medical ethics. I first discuss some of Margolis's normative and metaphysical views on death and abortion, particularly in his early work Negativities , as well as some of his metaphysical assumptions. Then these views and assumptions are related to his theory of persons and, by implication, his theory of culture, set forth in a number of later works. In the course of the discussion, I call attention to some controversial issues of today, such as embryonic stem cell research and the creation of embryos for the sole purpose of research, and ask for Margolis's views on them, given his earlier contributions and assumptions. Finally, I comment on his relativism and his program for research in aesthetics and ethics.  相似文献   
49.
王亚鹏  董奇 《心理科学》2006,29(6):1512-1514
本文从情绪的效价载荷及其脑功能成像研究、面部表情的识别及其脑功能成像研究以及情绪的诱发及其脑功能成像研究等三方面介绍了情绪加工的脑机制及其研究现状。从现有的研究成果来看,大脑皮层在加工不同效价载荷的情绪时具有很大的重叠性;有关面部表情识别的研究表明,不同的神经环路负责调节对不同面部表情的反应;有关诱发的情绪的研究表明,前扣带回皮层在表征实验诱发的情绪时扮演着一个非常重要的角色。文章最后指出了情绪研究目前面临的一些问题,并指出在我国开展情绪的脑机制研究的重要意义。  相似文献   
50.
It is an undeniable empirical fact that a human fetus is a member of the species homo sapiens from the moment of conception. There is thus an important sense in which it is a human being in itself, and not simply part of a pregnant woman's body, despite what defenders of abortion on demand might want us to think. It is also reasonable to suppose that all human beings, and thus human fetuses, are persons, with all that entails, but this is a metaphysical presupposition as opposed to an empirical fact, and is thus contentious. It is argued, however, that this should be of little comfort to the defenders of abortion, because the mere fact that human fetuses have an inherent tendency to become persons is sufficient reason to confer a moral status upon them, which renders abortion morally problematic at best.  相似文献   
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