关于低值易耗品摊销等问题的探讨

根据会计学课程教学实践，就高等专科学校会计学教科书中有关低易耗品摊销等问题进行了探讨，提出了一些建设性看法。     

Seed priming with chitosan improves maize germination and seedling growth in relation to physiological changes under low temperature stress

Low temperature stress during germination and early seedling growth is an important constraint of global production of maize. The effects of seed priming with 0.25%, 0.50%, and 0.75% (w/v) chitosan solutions at 15 ℃ on the growth and physiological changes were investigated using two maize (Zea mays L.) inbred lines, HuangC (chilling-tolerant) and Mo17 (chilling-sensitive). While seed priming with chitosan had no significant effect on germination percentage under low temperature stress, it enhanced germination index, reduced the mean germination time (MGT), and increased shoot height, root length, and shoot and root dry weights in both maize lines. The decline of malondialdehyde (MDA) content and relative permeability of the plasma membrane and the increase of the concentrations of soluble sugars and proline, peroxidase (POD) activity, and catalase (CAT) activity were detected both in the chilling-sensitive and chilling-tolerant maize seedlings after priming with the three concentrations of chitosan. HuangC was less sensitive to responding to different concentrations of chitosan. Priming with 0.50% chitosan for about 60～64 h seemed to have the best effects. Thus, it suggests that seed priming with chitosan may improve the speed of germination of maize seed and benefit for seedling growth under low temperature stress.     

模拟低氧组合训练对提高我国女子400m栏速度耐力水平的探析

运用文献资料、数理统计和逻辑归纳比较法,通过比较国内外女子400m栏优秀运动员全程跑的相关数据,分析出速度耐力储备能力较国外运动员差是我国女子400m栏优秀选手以后期待解决的主要问题,根据400m栏能量供应的特点以及目前最具代表性的三种低氧耐力训练方法分析研究,从理论与实践上比较分析出较为科学有效的提高女子400 m栏运动员速度耐力水平的训练方法-模拟低氧组合训练法,模拟低氧组合训练比高原训练及单一低氧训练的更具经济性和实效性,希望能为我国女子400 m栏的速度耐力水平训练提供一些理论参考.     

低碳发展方案编制指南(第三部分)——制定低碳发展规划

本节介绍制定低碳发展计划常用的核心步骤。本指南侧重城市层面;同样的步骤也适用于企业、市、省和国家等层级。中国自"十一五规划"起,对改善国内能源强度定出目标,包括各经济部门的节能目标。2009年12月中国政府公布了其碳强度目标,重点放在单位GDP用能引发的二氧化碳排放量。为实现该强度目标以及"循环经济"等经济性目标,制定低碳发展规划尤其必要。     

A qualitative analysis of context-aware ubiquitous learning environments using Bluetooth beacons

The use of Bluetooth Low Energy (BLE) beacons is becoming widespread for context-aware learning environments. This technology can be used in indoor and outdoor settings such as museums, shops, home and schools in order to identify the location of learners and their contexts. Specifically, in the constructivist view of learning, learners can use such sensing technology for constructing knowledge and experiencing learning at any time, anywhere. However, exploration of such technology has been limited in the constructivist context-aware ubiquitous learning (U-learning) literature. For this purpose, the authors evaluated two android-based U-learning applications: one was an outdoor learning environment in a garden, the other was about locating books in a library. The applications were implemented and tested with school and university students. The qualitative results are presented in this article, and show how such sensing technology is promising for both pedagogical environments.     

空调器热泵制热量的提高

本对房间空调器热泵实际使用状态与额定状态的差异进行了分析，提出了增强热泵制热效果的方案。     

Programmed cell death features in apple suspension cells under low oxygen culture

INTRODUCTION A number of abiotic stresses have been shown to induce programmed cell death (PCD) responses in plant cells. High temperatures (e.g. 55 篊) induce nuclear condensation and DNA fragmentation in cultured carrot, cucumber and Arabidopsis cells (McCabe et al., 1997; McCabe and Leaver, 2000), and also mitochondrial cytochrome c release in cucumber cotyledons (Balk et al., 1999). The PCD pathway also appears to be activated by ozone. Ozone induces an oxidative burst with acc…     

低频脉冲电流治疗慢性胃炎和溃疡病48例

本文报告了用低频脉冲电流治疗慢性胃炎和溃疡病48例。其中治愈38例,显著好转6例,好转2例,无效2例。文中列举了2个典型病例,并讨论了治疗机理。     

低碳的价值论维度及其当代启示

"低碳"是人类对传统经济发展方式及其造成的生态环境后果进行反思的产物,是现代人类经济社会发展的必然选择,关涉人类的根本利益和长远利益。低碳蕴含着丰富的价值论纬度。低碳的价值论解读,对于我们扬弃旧的生态价值观、树立新的生态价值观具有重要启示。我们必须以科学发展观为指导,树立新的生态价值观。新的生态价值观必须坚持以人为本;必须尊重自然法则,科学认识和处理人与自然的关系;必须尊重社会规律,实现自然生态与社会生态的和谐统一。     

轴承钢高拉碳工艺探讨

针对转炉冶炼轴承钢终点高碳、低磷、保温度的工艺要求,优化转炉冶炼工艺,提高转炉终点碳含量,保证终点磷和终点温度控制稳定,实现提高钢水质量,降低生产成本等要求。