文学思维与科学思维的共通性研究

长期以来学术界传统观点认为文学思维和科学思维属于两个截然不同的范畴,科学就是理性逻辑,而文学则等同于感性形象,两者谈不上有任何本质联系。从文学思维与科学思维在某种程度上整合统一的可能性出发,在阐明文学思维和科学思维本质特征的同时揭示它们在思维结构上的共通性——两者都是线性思维与非线性思维的迭加。     

我国中职师资队伍供求矛盾分析及其均衡的实现

分析现状,我国中职师资队伍供求矛盾突出,缘于多方面因素的影响。现实条件下,短期内应从稳定教师队伍,增加教师有效供给解决;长期来看,应注重规划培养、建立教育预警机制、灵活教师资源储备、规范教师人力资源市场建设、以及加强政府对中职师资队伍的宏观管理实现。     

Phytate： impact on environment and human nutrition. A challenge for molecular breeding

Phytic acid (PA) is the primary storage compound of phosphorus in seeds accounting for up to 80% of the total seed phosphorus and contributing as much as 1.5% to the seed dry weight. The negatively charged phosphate in PA strongly binds to metallic cations of Ca, Fe, K, Mg, Mn and Zn making them insoluble and thus unavailable as nutritional factors. Phytate mainly accumulates in protein storage vacuoles as globoids, predominantly located in the aleurone layer (wheat, barley and rice) or in the embryo (maize). During germination, phytate is hydrolysed by endogenous phytase(s) and other phosphatases to release phosphate, inositol and micronutrients to support the emerging seedling. PA and its derivatives are also implicated in RNA export, DNA repair, signalling, endocytosis and cell vesicular trafficking. Our recent studies on purification of phytate globoids, their mineral composition and dephytinization by wheat phytase will be discussed. Biochemical data for purified and characterized phytases isolated from more than 23 plant species are presented, the dephosphorylation pathways of phytic acid by different classes of phytases are compared, and the application of phytase in food and feed is discussed. Project supported by the Danish Agency for Science, Technology and Innovation, Copenhagen, Denmark and HarvestPlus     

Examining the application of Web 2.0 in medical-related organisations

Objectives: This study surveyed Web 2.0 application in three types of selected health or medical‐related organisations such as university medical libraries, hospitals and non‐profit medical‐related organisations. Methods: Thirty organisations participated in an online survey on the perceived purposes, benefits and difficulties in using Web 2.0. A phone interview was further conducted with eight organisations (26.7%) to collect information on the use of Web 2.0. Data were analysed using both quantitative and qualitative approaches. Results: Results showed that knowledge and information sharing and the provision of a better communication platform were rated as the main purposes of using Web 2.0. Time constraints and low staff engagement were the most highly rated difficulties. In addition, most participants found Web 2.0 to be beneficial to their organisations. Conclusions: Medical‐related organisations that adopted Web 2.0 technologies have found them useful, with benefits outweighing the difficulties in the long run. The implications of this study are discussed to help medical‐related organisations make decisions regarding the use of Web 2.0 technologies.     

Lectin-functionalized microchannels for characterizing pluripotent cells and early differentiation

Embryonic stem (ES) cells are capable of proliferating and differentiating to form cells of the three embryonic germ layers, namely, endoderm, mesoderm, and ectoderm. The utilization of human ES cell derivatives requires the ability to direct differentiation to specific lineages in defined, efficient, and scalable systems. Better markers are needed to identify early differentiation. Lectins have been reported as an attractive alternative to the common stem cell markers. They have been used to identify, characterize, and isolate various cell subpopulations on the basis of the presentation of specific carbohydrate groups on the cell surface. This article demonstrates how simple adhesion assays in lectin-coated microfluidic channels can provide key information on the interaction of lectins with ES and definitive endoderm cells and thereby track early differentiation. The microfluidic approach incorporates both binding strength and cell surface receptor density, whereas traditional flow cytometry only incorporates the latter. Both approaches are examined and shown to be complementary with the microfluidic approach providing more biologically relevant information.     

走进与走出:对国外毛泽东研究领域第三次论战的方法论反思

国外毛泽东研究领域第三次论战主要是围绕心理分析方法,即从微观方面勾画毛泽东思想肖像而展开的"争论"。唯物史观只是提供了从总体上把握毛泽东的方法,只是构建了毛泽东的"整体骨架"。用心理分析方法"走进"毛泽东的内心世界,是对唯物史观的有效补充。但同时必须深刻认识到心理分析方法固有的弊端,否则只能是历史唯心主义的解释。在尝试走进毛泽东的内心世界的同时,我们还必须学会走出。     

碰碰车常有,而碰碰船不常有

去游乐场玩过碰碰车吗?我想大多数同学有过这样愉快又刺激的经历,但是,碰碰船可不是轻易就能玩到了吧!不要着急,今天,咱们就来制作一个小型碰碰船,只用一支蜡烛就能让你体验到蒸汽机的伟大力量!