普及性音乐素质教育中的评估标准及强化措施

由探索“素质”的词义人手论述“音乐素质”的内涵,针对音乐学习与教育中的某些现实问题进行探讨,强调后天的教育和学习对于提高音乐素质的意义和作用;尝试提出适合于普通高校学生实际的音乐素质评估最低标准;提出强化学生音乐素质的若干措施。     

Expression of nerve growth factor-like polypeptides and immunoreactivity related to the two types of neurotrophin receptors in earthworm tissues

Nerve growth factor (NGF) belongs by sequence homology to the neurotrophins, a family of proteins binding the same p75 receptor and closely related members of the Trk family of receptor tyrosine kinases. Fundamental in the vertebrate nervous system, neurotrophin signals have also been suggested as essential for relatively complex nervous systems occurring in invertebrate species that live longer than Caenorhabditis elegans and Drosophila melanogaster. Mammalian neurotrophins have been found to influence invertebrate neuronal growth. However, there are only a few data on the presence of molecules related to neurotrophin signalling components in invertebrates. Our studies provide evidence that analogues of neurotrophins and neurotrophin receptors are expressed in Eisenia foetida earthworms. In particular, NGF-like and Trk-like immunoreactive proteins are both expressed in the nervous system, whereas p75-like positivity identifies tubular structures associated with dorsal pores that are involved in the earthworm response to mechanical irritation or stress. Received 12 November 2001; received after revision 8 January 2002; accepted 8 January 2002     

Recombinant expression of perchloric acid-soluble protein reduces cell proliferation

Perchloric acid-soluble protein (PSP) may play an important role in the regulation of cellular physiological functions because it has been highly conserved throughout evolution; however, this role has not been well elucidated. In previous reports, we suggested that PSP regulates cell proliferation. In this study, we examined the effect of PSP expression on proliferation of the normal rat kidney cell line NRK-52E, the rat hepatocyte cell line RLN-10, and the rat hepatoma cell line dRLh-84. Cells transfected with pcDNA-sense-PSP (pcDNA-S-PSP) over-expressed PSP mRNA and protein, and cell proliferation of the transfected cells was suppressed compared with that of cells transfected with pcDNA-empty (pcDNA-E). Cell viability of pcDNA-S-PSP-transfected cells was similar to that of pcDNA-E-transfected cells. Thus, over-expression of PSP suppresses cell proliferation without any influence on cell viability. These findings are the first to report an inhibitory activity of PSP on cell proliferation. Received 27 April 2001; received after revision 8 June 2001; accepted 8 June 2001     

半(p,r)-预不变凸函数及其规划的最优性条件

首先在半预不变凸函数和(p,r)-预不变凸函数的基础上,定义了一类新的广义凸函数半(p,r)-预不变凸函数,它既是半预不变凸函数又是(p,r)-预不变凸函数的推广形式,从而是熟知的凸函数和不变凸函数的推广形式.接着,讨论了半(p,r)-预不变凸函数的一些有用性质.最后利用半(p,r)-预不变凸(凹)函数讨论了目标函数和约束函数均不可微的多目标规划问题,从而获得两个最优性条件.     

21世纪大学英语网络课程开发和应用研究

文章对21世纪大学英语网络课程做出了全新的设计和开发,并根据几年来应用的情况论述了它的教学实用性。     

正交试验优化基因工程菌(E.Coli/p WSY)产黑色素培养基的组成

用正交试验优化了基因工程菌（Ｅ．ｃｏｌｉ／ｐ ＷＳＹ）产黑色素培养基的组成。配方为：蛋白胨１％、葡萄糖０．２％、硫酸铵０．５％、磷酸氢二钾０．７％、磷酸二氢钾０．３％、氯化钠０．５％，硫酸镁０．０１％，为实现微生物发酵法大规模生产黑色素提供了重要数据。     

广义半内积空间中的Berberian技巧

解决广义半内积空间中的Ｂｅｒｂｅｒｉａｎ技巧，并利用该技巧得到自反、严格凸的Ｂａｎａｃｈ空间中广义ｐ自共轭算子的谱的性质。     

第(p)类Rhoades映象存在不动点的充要条件

本文给出了第(p)类Rhoades映象(P=1,2,…,5)的定义,给出了第(p)类Rhoades映象(P=1,2,3,4)存在不动点的充分必要条件.仅仅第(3)类Rhoades映象就蕴含了13种已知的基本映象。本文主要结果相当成功地解决了Rhoades~[15]所提出的一个著名问题。