节能环保型文化创意旅游发展策略研究

随着环保理念的不断深入人心,基于环保意识的文化创意型旅游也在不断发展中,是展现特色文化的重要表现形式,为此,就如何在环保节能意识下创建文化创意型旅游进行探讨分析,以供相关人员参考。     

浅谈厂矿企业绿化设计

从安全生产、用地、环境及使用功能几个方面介绍了厂矿企业绿地的特点,详细分析阐述了厂矿企业绿化设计的步骤,并分别对粉尘烟尘、噪音污染、温度较高等各类特点的厂矿企业绿化设计中植物的选择问题进行了论述,从而规划建设出良好的厂矿企业环境。     

沈阳城市生活垃圾处理现状与资源化利用对策

垃圾是放错了位置的资源。从城市环境生态保护及资源再生利用的角度,论述了目前城市生活垃圾对生态环境造成的污染以及沈阳城市生活垃圾的处理现状,分析了城市生活垃圾各种处理方法的利弊。在做好垃圾分类的基础上,从可再生资源的回收、垃圾堆肥在农业上的应用、垃圾焚烧渣在工业上的运用以及引入蚯蚓技术等方面提出了城市生活垃圾处理与资源化利用的对策。     

基于氨基酸的新型树枝状色谱置换剂的合成及性能

高效置换剂的设计与合成一直是置换色谱发展的重要方向。采用固相合成方法合成了新型树枝状聚电解质置换剂Phe-D和Leu-D，并与置换剂BAEE进行了对比研究。研究结果显示，置换剂的动态亲和性随着lgΔ值增大而降低。在lgΔ<0.845时，BAEE具有最高的动态亲和力;而随着lgΔ进一步升高，Phe-D展现出最强的动态亲和力，这种趋势一直维持至lgΔ值达到3.08。蛋白质的静态置换实验表明，新型置换剂对蛋白质具有更高的置换百分率。这种高置换率主要源于置换剂中伯胺基团数量的增加;同时，Phe-D分子中苯基的引入使模型蛋白的置换百分率提高了70%，展示了苯基对蛋白质置换的促进作用。     

利用膨胀床吸附技术单步纯化分子伴侣—GroEL

Expanded bed adsorption (EBA) is an integrative downstream processing technique for the purification of biological substances directly from unclarified feedstock. In this study, molecular chaperone GroEL, an important protein folding helper both in vivo and in vitro, was purified by the single-step EBA technique from the unclarified homogenate of recombinant E. coli cells. Compared with packed bed adsorption, the EBA technique provided a single-step approach to yield an electrophoretic purity of GroEL. After the homogenate loading and column washing in the expanded bed mode, the GroEL protein was recovered by stepwise salt-gradient elution in packed-bed or expanded-bed modes, respectively. The expanded-bed elution mode was found as efficient as the packed-bed mode in the purification of GroEL from cell disruptate.     

膨胀床应用中的高密度薄壳型琼脂糖凝胶介质、流体力学与固相分布

Two dense pellicular agarose-glass matrices of different sizes and densities, I.e., AG-S and AG-L, have been characterized for their bed expansion behavior, flow hydrodynamics and particle classifications in an expanded bed system. A 26 mm ID column with side ports was used for sampling the liquid-solid suspension during expanded bed operations. Measurements of the collected solid phase at different column positions yielded the particle size and density distribution data. It was found that the composite matrices showed particle size as well as density classifications along the column axis, I.e., both the size and density of each matrix decreased with increasing the axial bed height. Their axial classifications were expressed by a correlation related to both the particle size and density as a function of the dimensionless axial bed height. The correlation was found to fairly describe the solid phase classifications in the expanded bed system. Moreover, it can also be applied to other two commercial solid matrices designed for expanded bed applications.     

麦场火患及防范

去年武威全区共发生麦场火灾17起,占全年火灾总数的20％,烧毁小麦69000公斤,烧毁麦秸83500公斤以及其它豆类等,直接经济损失10万余元,究其原因主要有:1、违反安全操作规定。大部分是因拖拉机排气管不戴防火帽,在麦场上维修机器等不懂安全操作规程所致。2、小孩玩火。农忙季节不少小孩跟随大人们下田上场,由于大人顾不上照     

坚果类对心血管的保护作用

本文阐述了坚果类含有的不同营养成分和非营养活性成分对心血管的保护作用。     

塔与兵

塔,一个古怪的家伙,它孤傲地矗立在操场上,一副难以征服的样。 兵,一群毛孔里都溢着青春的精灵,严肃活泼,整齐地走近了练塔。 塔沉默着,执拗地从窗洞里激