龙图腾崇拜与中华民族的融合

龙图腾崇拜是中华民族的共同心理,有极其丰富的内容和文化内涵。     

Effect of temperature on batch elastase production by Bacillus sp. EL31410

The production of elastase by Bacillus sp. EL31410 at various temperatures was investigated. In order to study the effect of temperature on elastase fermentation, different cultivation temperatures, ranging from 39 ℃ to 28 ℃, were evaluated in shake flask. The result indicated that 37 ℃ was best for cell growth at earlier stage; while maximum elastase activity was obtained when the cells were cultivated at 30 ℃. This result was verified by batch fermentation in 5-L bio-reactor under 37 ℃ and 30 ℃ temperature, respectively. The specific cell growth rate at 37 ℃ was higher than that at 30 ℃ during earlier stage of cultivation. The maximum value [5.5 U/(h-g DCW)] of elastase formation rate occurred at 24 h at 30 ℃ compared to 4.6 U/(h-g DCW) at 30 h at 37 ℃. Based on these results, two-stage temperature shift strategy and oscillatory temperature cultivation mode were evaluated in the next study. When compared to single temperature of 37 ℃ or 30 ℃, both two-stage temperature shift strategy and os     

教师权利的法律解读

教师的权利是法定的,它包括社会生活权利和职业权利两方面。我国法律对教师权利的确认和保护是全面的。但现实生活中我国教师尤其是处在基础教育第一线的教师却长期处在权利缺失的困境中。教师维权意识不强,维权现状不容乐观。因此教师应了解维权的途径,多渠道地去寻找法律救济。     

浙江省群众性羽毛球运动的发展现状与对策

羽毛球运动在浙江省有着广泛的群众基础,通过对当前浙江省群众性羽毛球运动开展现状进行调查、分析,从协会组织建设、场地设施建设和扩大服务内容与提高质量等方面提出相应的发展对策与建议,为今后更好地开展该项运动提供理论依据和实践指导.     

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulus L.)

Waste hops are good sources of flavonoids. Extraction of flavonoids from waste hops (SC-CO₂ extracted hops) using supercritical fluids technology was investigated. Various temperatures, pressures and concentrations of ethanol (modifier) and the ratio (w/w) of solvent to material were tested in this study. The results of single factor and orthogonal experiments showed that at 50°C, 25 MPa, the ratio of solvent to material (50%), ethanol concentration (80%) resulted in maximum extraction yield flavonoids (7.8 mg/g). HPLC-MS analysis of the extracts indicated that flavonoids obtained were xanthohumol, the principal prenylflavonoid in hops. Project (No. Y304203) supported by the Natural Science Foundation of Zhejiang Province, China     

高素质市场营销专业人才培养的基础与保证

章针对中国市场营销专业人才培养方面存在的问题，从优化教学计划、进行课程结构与教学内容的调整、加强营销实践、建设高素质师资队伍与提高教师的学术水平等方面，论述了高素质市场营销专业人才培养的基础和保证。     

教师教育从传统到现代的哲学跨越

本文讨论了当代教师教育的两个背景——知识经济与互联网络,阐述了理念、时空和实践三个范畴的哲学新内涵,并对教师职业发展前景提出了五点预测。     

析相光度法测定食品中微量铜的研究

在pH为9.0的NH4Cl-NH3.H2O缓冲介质中,研究了Cu(Ⅱ)-苯基荧光酮(PF)-Triton X-100析相体系的最佳显色条件及其吸收光谱的分析特性.结果表明,Cu(Ⅱ)-PF-Triton X-100胶束溶液在95℃下加热1 h,配合物即被Triton X-100相完全富集,其最大吸收峰为546 nm,铜含量在0.5~8μg/5ml,符合比耳定律,表观摩尔吸光系数ε为4.7×104L.mol-1.cm-1;并尝试以氟化钾、酒石酸钾钠、柠檬酸钠为掩蔽剂,应用于食品中铜含量的测定,结果令人满意.     

论高等数学教育教学信息化策略

信息技术和Internet的使用,已对大学教育教学工作提出了信息化的要求,高等数学课程与教学必须与信息时代的特征相融合.树立信息化意识;构建信息化系统;并形成全新的信息化教学与学习模式;应成为高等数学教育改革的发展方向.     

社会需求对传统大学生评价内容的拷问

大学生评价对大学生的成长与发展具有十分重要的引导激励作用,评价内容的确定既要遵循教育自身的追求,更要关注社会的合目的性,要因应社会发展对人才的需求变化.拷问传统大学生评价的内容,我们清晰地发现其具有明显的局限性,主要表现为以单纯的知识评价为主和忽视学生的全面性、创造性和个性发展.在对传统大学生评价批判继承的基础上,我们能够准确找到大学生评价调整的方向,进而为大学生成长选择科学的评价内容,在全面发展中充分尊重其个性发展,用创新的评价思路为学生成长搭建创造平台,培养出满足社会需求的合格人才.