关于Bochner-Martinelli核的二个定理

证明了几个复变量空间Cn中著名的Bochner-Martinelli核的二个再生定理。设 表示超球面，则有，称为Bochner-Martinelli核的一个再生性质。设，,则为Bochner-Martinelli核的另一再生性质。二个再生定理在研究多复变数哥西型积分中有重要作用。     

聚乙烯醇缩甲醛的缩醛度过大的再生处理

根据在酸性介质中羟醛缩合反应是可逆的原理,对聚乙烯醇缩甲醛的制备过程中出现的凝胶进行再生处理,减少了原料浪费。经处理后的产品能够达到产品质量指标的要求。     

上海的城市更新与历史建筑保护

城市更新涉及物质性的更新和非物质性的更新,包括城市结构和城市空间的更新、建筑的更新、城市环境和道路的更新、思想意识的更新。在政治、历史、经济、意识形态、文化、宗教、伦理、人口等因素的作用下,城市总是处于更新过程中。城市更新的目标是实现城市未来发展的目标愿景,是城市的理想、审美和价值的体现,城市更新必须注重历史文化的保护。上海历史文化风貌区和优秀历史建筑的保护,历史风貌道路的保护也将推动城市更新和国际文化大都市的建设。对于建筑文化遗产的保护有一个缓慢的认识过程,经历了城市大规模的快速建设阶段之后,上海开始理性地思考建筑文化遗产的保护,初步建立了分级保护制度,同时也建立了保护机制。承认历史的变迁,根据建筑的类型和质量,根据上海的实际情况,采取多元的保护方式,形成了基本符合上海历史建筑特点的现实的建筑文化遗产保护机制和方法。坚持使用与保护相结合,在使用中保护。文章还讨论了对建筑保护方面存在问题的思考。     

机械再生设计与创新方法的形象化图形表示法

机械再生设计与创新方法作为机械类专业学生的必备知识,具有重要的实用价值。本文以形象化教学方法为指导,提出了表示该方法讲解过程的图形表示法,有利于学生较快地掌握该方法的实施步骤。     

Efficient propagation with in vitro seed germination of Vanda falcata

Vanda falcata (Thunb.) Beer (Orchidaceae), a famous native orchid of China, Japan, and Korea, is known as one of the most beautiful and charming orchid species in the world (Ohwi, 1965; Lawler, 1984; Arditti, 2008). V. falcata is widely cultivated and delights the world with its compact plant shape, elegant white blooms, and sweet coconut-like scent. However, vegetative propagation by division has limited the development of V. falcata because of its inefficiency (Mitsukuri et al., 2009a, 2009b).     

生物质能源的开发利用与前景

运用绿色化学原理，论述了化石能源的环境影响和开发利用可再生能源的重要性，生物质能是最有潜力的可再生能源，着重论述了生物质能源转换技术及其应用的广阔前景。     

抒情小赋的更生及其历史地位

从社会思想、创作动因、审美意识、文学自身发展规律等 4个方面论述了魏晋南北朝抒情小赋更生的原因、在文学的继承和发展中不可替代的作用及其历史地位     

真涡虫的习性

简要叙述了真涡虫的形态、生态、运动、食性、光反应性、再生、生殖等方面的习性．     

城市更新中就近安置的居民满意度评价——以上海河间路保障房项目为例

多元化安置模式和居民满意度是因地制宜推动城市更新的关键因素.通过对中华人民共和国成立以来上海市城市更新中安置模式的历史梳理,说明就近安置模式是多元安置的有效补充.以上海市河间路保障房项目为例,分析就近安置模式的操作过程和规划设计策略,并以居民满意度的调查方法获取居民对就近安置模式的接受度、评价与优化意见.指出大城市的城...     

The response of liver lipid peroxidative and antioxidant defense systems of protein undernourished rats to liver regeneration

The response of liver lipid peroxidative and antioxidant defense system of protein undernourished rats to liver regeneration induced by partial hepatectomy was examined in rats. Animals were divided into four groups; A,B,C and D of four animals each. Animals in group A were maintained on 16% casein diet while those in groups B, C and D were placed on low-protein diet (5% casein) for fourteen weeks and fed ad libitum. 72 hours before sacrifice, partial hepatectomy was carried out on animals in group D while animals in group C were sham-operated. The results show that protein undernutrition induced an increase in lipid peroxidation but reduced catalase activity, glutathione level and superoxide dismutase activity when compared with well-nourished rats. Liver regeneration however, resulted in significant increases in lipid peroxidation and catalase activity but significant reductions in glutathione level and superoxide dismutase activity in protein undernutrition rats when compared with their sham-operated counterparts. These results suggest that liver regeneration induced by partial hepatectomy exacerbates lipid peroxidation in protein undernutrition rats and that Catalase plays a major role in the mopping up of reactive oxygen species generated following liver regeneration in partially hepatectomised protein undernutrition rats.