CoFe水滑石的合成及其催化活性研究

以Co（NO3）2·6（H2O）和Fe（NO3）3·9（H2O）为原料,选取NaOH和Na2CO3为沉淀剂,采用低过饱和共沉淀法合成了CoFe系列的碳酸根型水滑石,用XRD、IR和TG-DTA等分析手段对样品进行测试和表征.经焙烧后,发现其复合氧化物对乙醇催化脱水、脱氢反应有一定的活性.     

三峡库区移民迁建学校课外体育锻炼调查研究

对三峡库区移民迁建学校课外体育锻炼的开展情况,课外锻炼开展的内容、形式及存在的问题进行调查,提出了三峡库区移民迁建学校有效开展课外体育锻炼的措施.     

不同基因型玉米自交系在低磷胁迫下的生理生化特性比较初探

以珍珠岩作基质固体培养六种不同基因型玉米自交系材料，设置025mol／L KH2PO4全磷（对照）、10μmol／L KH2PO4（低磷）、1μmol／L KH2PO4（极低磷）三种处理，于四叶一心时测定叶绿素含量、SOD活性、POD活性以及MDA含量的变化．各自交系在低磷和极低磷胁迫时，叶绿素含量都升高．缺磷时不同自交系的根和叶的SOD及POD的变化趋势不一致：自交系04099和04417叶片和根系的SOD和POD活性与对照相比均增加；04065叶片和根系的SOD活性比对照升高，但是POD活性比对照降低；04419在两个缺磷水平处理下叶片和根系的SOD活性较对照下降，叶片的POD活性较对照上升，但根系的下降；04242经两个缺磷水平处理后叶片和根系的SOD活性下降，叶片POD活性在低磷处理下上升，极低磷时下降，根系POD活性降低；04088SOD活性变化与04242相同，但是低磷和极低磷下的叶片POD活性比对照增加，根系POD活性在低磷条件下降低，极低磷下上升，玉米的膜脂过氧化程度在缺磷处理时发生改变，低磷和极低磷处理时所有自交系的叶片和根系MDA含量也发生不了同程度的变化，综合分析，初步判断自交系04099和04065是耐低磷胁迫能力较高的材料，有进一步研究的价值。     

Physiological and ultralstructural changes of Chlorella sp. induced by UV-B radiation

In order to investigate the mechanisms of enhanced UV-B radiation on algae, the effects of UV-B radiation on the physiological and ultrastructural changes of Chlorella sp. were examined. The results showed that UV-B radiation could inhibit the growth and photosynthesis of microalgae. UV-B radiation at lower doses increased the photosynthetic pigment (chlorophyll a (Chla) and carotenoid (Car)) contents, while at higher doses of UV-B radiation Chla and Car contents were decreased. The ultrastructure of Chlorella sp. without exposure to UV-B showed that the thylakoid lamellae were clear and regular, the stroma of its chloroplast was apparent and clear. The globules with photosynthetic pigments and the cristae of mitochondria were clearly seen. After exposure to UV-B radiation at dose of 2.88 kJm2, the thylakoid lamellae of Chlorella sp. were lost and dissolved, the globules which contained photosynthetic pigments in chloroplast were bleached; some mitochondria cristae were dissolved; slight plasmolysis was found in some Chlorella sp. cells. After exposure to 5.76 kJm2 UV-B radiation, the thylakoid was in disarray and disintegration, plasmolysis was found in most cells, and the cell wall was broken and began to fall out. Many blank areas were observed in cells, mitochondria were seriously deformed and most of the mitochondria cristae were dissolved. Also, globules containing photosynthetic pigments in chloroplast were bleached and some empty globules were found in chloroplast. Therefore, UV-B radiation could damage cell structure of Chlorella sp., and this damage increased with the dose of UV-B radiation they exposed to.     

谷氨酸能神经传递系统研究进展

谷氨酸广布于大脑皮质等处,以(-酮戊二酸、谷氨酰胺或鸟氨酸等为前体进行合成,通过快突触传递或慢突触传递与突触后膜上的三种类型的受体相结合,参与学习记忆、突触可塑性、细胞凋亡、自主运动神经活动及神经毒性作用等生理和病理功能.     

不同培养基对红树林真菌HTF3菌株抗肿瘤活性物质合成的影响

对红树林真菌HTF3菌株在PD、GPY、YES、GPM及SYE5种不同培养基中的生长情况、抗肿瘤活性及代谢产物的形成进行了研究，旨在了解培养基对该菌株生长及抗肿瘤活性物质合成的影响．结果显示：在不同的培养基中．HTF3菌株的生长速率不同．抗肿瘤活性及抗瘤谱也有明显差异；采用HPLC对不同培养基发酵液乙酸乙酯抽提物进行分析，发现不同抽提物的色谱峰数、色谱峰的保留时间及紫外吸收值均有较大的不同，实验结果表明：不同培养基对HTF3菌株抗肿瘤活性物质的合成有显著影响．     

新四、六级考试下大学英语听力教学改革

文章就改革大学英语四、六级考试,加大听力部分的题量和比例的问题,提出了改革英语听力教学,创新课堂教学模式;加强课外"泛听"等举措.     

普通高校学生课外体育活动现状的研究

通过文献资料法、问卷调查法、访问调查法等研究方法,对洛阳市部分普通高校学生课外体育活动现状进行了分析研究,并对发现的问题提出了建议:加强学校有关部门对课外体育工作重要性的认识、进一步完善课外体育锻炼的组织形式、采取有效的措施、引导大学生进行体育锻炼.     

生物钙化作用

研究发现Ca2+的主要作用分为三种:第一种是生物调控作用;第二种是结构作用;第三种是生物钙化作用.本文论述了生物钙化作用的模式及无机化学基础.     

当前农村宗族活动探析

由于根深蒂固的宗法观念、“亲族聚居”的居处方式，社区文化建设落后等原因，我国农村的宗族活动已成为一个较为普遍的现象，要正确治理农村宗族活动必须加强农村经济建设，法制建设，精神文明建设和推进以村民自治为主的基层民主建设。