芜湖市2006年生态足迹分析

采用生态足迹模型,对芜湖市2006年的生态足迹进行计算和分析,评价了芜湖市可持续发展的状况。结果表明：芜湖市人均生态足迹为2．203hm^2,人均生态承载力为0．277hm^2,人均生态赤字为1．926hm^2,万元GDP的生态足迹需求为1．051hm^2,远远低于全国平均水平。反映出芜湖市生态系统处于人类的过度开发利用状态。最后提出了减缓芜湖市生态赤字的对策。     

鸡胚成纤维细胞酵母双杂交cDNA文库的构建及鉴定

选取对新城疫病毒(NDV)易感的鸡胚成纤维细胞(CEF),Trizol提取细胞总RNA,用SMART技术合成双链cDNA,然后利用同源重组的方法在酵母细胞内构建CEF的cDNA文库,以寻找与NDV基质(M)蛋白相互作用的宿主细胞蛋白,探讨其相互作用对NDV装配和出芽的影响.结果表明:提取的细胞总RNA的D260nm/D...     

西红花真菌性病害与生防菌鉴定研究进展

西红花Crocus sativus为多年生草本植物,具有活血化瘀、凉血解毒、抗癌、抗氧化等多种药用价值。由于无性繁殖及连作障碍,西红花病害日益严重;以真菌性引起的西红花球茎腐烂病害最为常见,造成西红花产量锐减,严重影响产业发展。解决真菌性病害是提高西红花产量与品质的有效途径之一。围绕西红花土壤真菌性病害、西红花内生真菌、西红花真菌病害生防菌的分离与鉴定研究进展等展开综述,分析西红花研究前景。后续研究可以从3个方向展开,一是基于现代宏基因组测序技术挖掘西红花球茎腐烂致病菌和拮抗菌,二是基于合成生物学和发酵工程技术方法实现西红花药效物质的异源高效生物合成,三是创制西红花脱毒新种质,为生产提供可靠的优质种源。本研究能为西红花真菌性病害防治、生物菌肥的开发利用等研究提供参考。表3参89     

Advanced treatment of swine wastewater by electrodialysis with a tubular ion exchange membrane

To remove the excess nitrogen and phosphorus in swine wastewater, an electrodialysis technique was applied to an advanced treatment method. The laboratory‐scale swine wastewater treatment system constructed for the present study consisted of an activated sludge process, as the main treatment unit, and electrodialysis, as an advanced treatment unit. This system was operated for 200 days and the processing performance was evaluated. By electrodialysis, approximately 99% of NO₃^– and PO₄^3– in the activated sludge‐treated water (AT solution) was removed during operation. Furthermore, electrodialysis decreased the color density of the AT solution at a rate of 58%. The advanced treatment of swine wastewater by electrodialysis proved to be an efficient technique to remove excess nitrogen and phosphorus, and decrease color density.     

Controlled release of estradiol-17β and bisphenol A from a silicone tube for long-term administration in mice

Silicone tubes filled with estradiol‐17β (E2) or the xenestrogen, bisphenol A (BPA) were covered with a polyethylene tube and implanted into mice subcutaneously. The releasing patterns from the tube in vivo were obtained from the volume of estrogen remaining in the tube by measurement with high performance lipid chromatography. E2 in glycerol was released in a few days from a silicone tube, which was not covered with a polyethylene tube (Type A). However, E2 in sesame oil was released very slowly from the silicone tube covered with a polyethylene tube (Type B) and approximately 10% of E2 remained in the tube at 56 days after implantation into the mice. The mean linear regression equation for E2 was Y = 70.967 ? 1.2271X (R² = 0.9268) and the quadratic regression equation was Y = 77.97 ? 2.2773X + 0.0194 × 2 (R² = 0.9864). The remainder rate curves of E2 and BPA were not significantly different throughout the experimental period of 56 days. The Type B tube in the present experiment might be useful for long‐term administration of estrogens.     

连云港市生态承载力研究

采用生态足迹模型对连云港市的生态承载力和生态足迹进行了研究。结果表明，1997～2006年连云港市处于严重的生态赤字状态，人均生态承载力呈减小趋势，生态系统的不稳定性日渐增强。     

Elbow lameness in the young dog caused by a sesamoidal fragment

Intermittent lameness in 8 dogs was attributed to a sesamoidal fragment in the elbow joint. The clinical signs, diagnosis and treatment of the condition are described.     

城市化地区水土保持发展层次分析

城市水土保持是门新兴课题。在充分分析我国城市化地区水土保持现状的基础上,首次提出了城市化地区水土保持工作的三个发展层次,即保护环境、改善环境、美化环境,并探讨了其有效地实现方式。     

小流域治理中的水土保持型观光农业

观光农业是农业与观光业相结合的一种复合型产业,其设计要求经济发展与环境保护相协调、资源利用和资源保护相统一。泰安市背靠泰山,旅游资源得天独厚,小流域治理中的水土保持型观光旅游农业应围绕泰山大旅游做文章。详细介绍了国内外观光农业的发展概况,并以泰安市小流域观光旅游农业的发展为例,介绍了观光农业的几种成功模式。