干细胞工程学研究现状和发展前景

阐述了干细胞研究现状、发展趋势和应用前景 ,对如何推进我国干细胞工程学的发展提出了建议。     

顿顶螺旋藻完整藻胆体与解离藻胆体光谱特性的比较研究

对钝项螺旋藻完整藻胆体与解离藻胆体吸收光谱进行了比较研究.随着藻胆体的逐渐解离,其吸收光谱表现出如下变化特点:在紫外光区,吸收峰始终位于355nm,尖形峰逐渐变成钝形峰;在红光区,都有很强的吸收,吸收峰呈平顶状,其半带宽逐渐变小;紫外光区与红光区相对吸收强度的比值逐渐变小;四级导数吸收光谱的小峰数目越来越少.室温荧光发射光谱表明,藻胆体在低于0.9mol/L的磷酸缓冲液中变得不稳定,并开始逐渐解离,解离的藻胆体与完整的藻胆体相比,其荧光发射峰波长逐渐变短.     

自聚焦克尔类电介质中非傍轴光束调制非稳的研究

Propagation stability of non-paraxial beam in nonlinear Kerr media is investigated with a linear stability method.Both theoretical analysis and numerical simulation show that modulation instability(MI) gain spectrum has three different distribution features determined by the times of incident power P0 and the non-paraxial parameter a. Furthermore,the corresponding criterion is put forward to distinguish the three different distributions.     

现代食品的发展与展望

论文通过对现代食品中出现的各种新型食品概念的辨析 ,简单对现代食品的发展历程和现状的介绍 ,使我们对现代食品有一个清楚的认识 ,并在此基础上对它们发展前景提出了展望。     

论我国非营利性组织公共性的缺失及其对策

非营利性组织作为一种社会公益组织，在向社会提供公共物品时应该遵循其公共利益最大化的原则，这是由非营利性组织“公共性”的本质属性所决定的。文章从非营利性组织及其公共性的涵义入手，分析其“公共性”缺失的原因，并就我国非营利性组织“公共性”缺失的问题提出了相关对策。     

高校图书馆核心竞争力探索与研究

高校图书馆欲在信息服务市场的竞争中应对挑战,必须构建自己的核心竞争力.本文分析了高校图书馆核心竞争力的构成要素及构建模型,对高校图书馆核心竞争力的途径与方法进行了探索与研究,提出了一些浅显的想法.     

语法化札记三则

进一步探讨疑问副词和语气助词“不成”的虚化年代、“没”和“没有”与语气词“么”的关系、近指指代词“这”的来源。     

Study on the serum levels of soluble intercellular adhesion molecule-1 (sICAM-1) in patients withHelicobacter pylori infection

Objective: To evaluate the interaction between serum levels of soluble intercellular adhesion molecule-1 (sICAM-1) andHelicobacter pylori (H. pylori) infection in patients with chronic gastritis and peptic ulcer. Methods: The serum levels of sICAM-1 in 205 patients with chronic gastric diseases were detected by ELISA method and the status ofH. pylori was determined by histologic examination, RUT,¹⁴C-UBT, and serology. The sera obtained from 18 healthy volunteers served as controls. Results: The serum levels of sICAM-1 were significantly higher in patients withH. pylori positive than those of H. pylori negative (889.43±32.52 ng/ml vs. 747.07±30.45 ng/ml,P<0.05). The serum levels of sICAM-1 in patients with mild, moderate and severe infection ofH. pylori were 841.68±72.36 ng/ml, 905.43±37.59 ng/ml and 1012.54±49.34 ng/ml, respectively (P<0.05). The serum levels of sICAM-1, proved to be significantly correlated with the density ofH. pylori colonization in gastric mucosa (r _s=0.316,P<0.001). The serum levels of sICAM-1 in patients with chronic gastritis and peptic ulcer were significantly higher than those in healthy controls (P<0.05). Conclusions: These results indicated thatH. pylori infection up-regulates the expression of sICAM-1.     

篮球战术基础配合定量评价方法研究

篮球战术基础配合的质量直接影响全队战术完成的效果和个人技术的发挥。长期以来对篮球战术基础配合运用效果的评价研究却很少见．且大多是定性分析。因此，力图研究一套定量评价与诊断篮球战术基础配合的方法，拟分析在比赛、训练、教学中篮球战术基础配合的运用效果。以定量化实现训练最佳的控制，为各级篮球教练员及教师服务。     

校园媒体资产管理研究

随着数字化时代的到来,校园网建设突飞猛进,校园媒体资产管理(Media Asset Management,即基于数据库对节目素材的视音频和针对素材的描述信息进行管理)也将逐步纳入校园网总体评估体系之中。该文在剖析现行校园媒体资产管理弊端的同时,提出了校园媒体资产管理变革之构想,并对校园媒体资产管理需解决的有关核心技术问题进行了深入的探讨。