广枣提取液对小鼠免疫功能和运动耐力的影响

观察了广枣提取液对小鼠免疫功能、运动耐力的影响。结果表明：广枣提取液可明显增加小鼠耐缺氧时间，延长小鼠负重游泳时间，降低运动后小鼠血乳酸水平，显著提高其心肌组织中SOD活力；同时明显增加小鼠脾脏／体重、胸腺／体重比值，增强小鼠对巨噬细胞的吞噬能力．提高小鼠的细胞免疫、体液免疫功能。提示广枣提取液具有显著促进小鼠免疫功能及显著提高小鼠运动耐力的功效。     

Is Freire Incoherent? Reconciling Directiveness and Dialogue in Freirean Pedagogy

While some of Paulo Freire's readers understand his pedagogy as a rejection of any and all directive teaching methods, there are many scholars who do recognise Freire's emphasis on teacher directiveness in its appropriate form. In light of this tension between directiveness and dialogue, it seems that students of Freire must inevitably come to a crossroads: is Freire's pedagogy directive or is it not? However, even this question does not get at the more critical dilemma: if Freire's pedagogy is directive, is such directiveness incompatible with Freire's overwhelming emphasis on egalitarian dialogue? This paper establishes three readings of the issue of directiveness in Freire and ultimately provides an exegetical defence of what is termed the compatibilist reading—that directive teaching, properly construed, is compatible with dialogic teaching in Freirean pedagogy. The question this paper seeks to answer is how Freire can have it both ways. In sum, Freire undeniably supports teacher directiveness and philosophically justifies directiveness as compatible with problem‐posing education through his concepts of virtue education, utopia and criticality.