海外都市农业对京郊都市农业的启示   总被引：11，自引：0，他引：11  

吴俊丽 《北京农业职业学院学报》2002,16(1):20-23

日本都市农业的主要作用体现为"食"与"绿".德国都市农业的主旨是为市民提供体验农家生活的机会,使久居都市的市民享受田园之乐.台湾地区的都市农业大致与德国的市民农园相同.京郊都市农业经过近20年的发展探索,已形成观光农业、休闲度假农业、体验型农业等类型.海外都市农业为京郊都市农业的发展提供了有益的启示.  相似文献   

新农村建设中农民居住环境问题的研究(Ⅱ)——以大成村为例对新农村村庄整治规划的探索     

胡佰林  赵素霞  尚志忠 《安徽农业科学》2007,35(35):11404-11405

重点介绍了焦作市新农村建设试点村大成村村庄整治规划情况,并就村庄整治规划的实施与管理方面提出了几点建议。  相似文献   

从创建园林城市看贵州城市园林建设的发展方向   总被引：2，自引：0，他引：2  

欧静  杨远庆 《山地农业生物学报》2006,25(1):73-76

从分析遵义市、都匀市、贵阳市创建省级园林城市所取得的成功之处入手，指出贵州城市多为山区城市，自然山水一方面给园林景观创造良好的条件，另一方面也使得人居用地紧张，再加上经济欠发达，如何处理好城市经济发展与园林建设发展，营建和谐的社会环境是大家共同关心的大事。认为贵州城市园林建设的发展方向是：先规划后建设，重视城市绿地规划；增加城市园林建设资金投入；推广立体绿化及屋顶绿化，特别是老城区能有效地增加城区绿地面积；挖掘本土植物进行城市园林造景；利用山地特征规划山地公园；营建精品园林号观，突出地方特色；应用GIS系统进行城市绿地系统规划，注重园林人才培养，提高规划设计人员水平；群众性参与城市园林建设。  相似文献   

两岸高校科技电子资源的共享策略与合作模式   总被引：2，自引：0，他引：2  

赵世华  袁静 《农业图书情报学刊》2004,16(9):31-34

信息技术的发展给两岸高校图书馆带来一种全新的网络环境，也使两岸高校图书馆生存、服务方式、技术手段发生深刻变化。根据两岸高校图书馆发展现状，我们提出了两岸高校科技电子资源的共享策略与合作模式。  相似文献   

农村养老面临的问题与对策     

黄宗华 《信阳农业高等专科学校学报》2007,17(1):26-28

建立农村养老保障体系有利于维护社会稳定,应对老龄化趋势,变革城乡养老二元格局。要弘扬中华民族传统美德,夯实家庭养老的社会基础;增强社区凝聚力,提高老年人自养能力;健全农村养老保险制度。  相似文献   

钢筋混凝土框架结构节点施工技术的探讨     

申钢  王秀花 《内蒙古农业大学学报(自然科学版)》2007,28(4):147-148

在"小震不坏,中震可修,大震不倒"的抗震设计原则下,钢筋混凝土框架结构都应该设计成延性结构,合理的设计梁、柱、节点,防止构件过早发生脆性破坏,控制构件破坏的先后顺序,在一定程度上实现"强柱弱梁"、"强剪弱弯"、"强节点弱构件"的抗震概念设计要求。本文从混凝土强度等级不同时梁柱施工中节点的处理来叙述施工质量对结构延性设计的完善和保证。  相似文献   

棉花生长素应答因子ARF3功能的初步分析     

张锋  崔百明 《勤云标准版测试》2007,(7)

生长素应答因子(auxin response factor,ARF)是转录因子的一个家族,在生长素信号传导途径中起着关键的作用。通过GenBank上登录的序列设计引物,利用RT-PCR技术扩增得到了陆地棉生长素应答因子ARF3的全长序列,并构建到植物表达载体pCAMBIA1301上,借助真空渗透转化技术,在农杆菌GV3101介导下转化模式植物拟南芥,经潮霉素筛选,得到了批量的转基因植株。通过PCR技术,检测到目的基因成功整合到拟南芥基因组中,RT-PCR检测到了目的基因在转基因植株中得到表达。  相似文献   

Construction and characterization of a cDNA library from Homo sapien fibrotic heart valves     

MENG Jin-xiu  LI Yun-xiong  ZHU Ping  LU Cong  ZHENG Shao-yi  YU Xi-yong 《园艺学报》2011,27(10):1868-1872

  相似文献   

Construction of a lentiviral RNA interference vector targeting rat myocardin and its effect on vascular smooth muscle cell differentiation     

JIE Wei  SHEN Zhi-hua  WANG Xiao-yan  KUANG Dong  WANG Guo-ping  AO Qi-lin 《园艺学报》2011,27(4):823-828

AIM: To construct a lentiviral RNA interference(RNAi)vector targeting rat myocardin mRNA and to investigate its effect on the differentiation of vascular smooth muscle cells(VSMCs).METHODS: Three pairs of dsDNA targeting rat myocardin mRNA were designed, synthesized and cloned into lentiviral vector pGCSIL-GFP to generate pGCSIL-GFP-shMyocd lentvirus. A Flag-tagged myocardin-overexpression vector pEGFP-N1-Myocd was constructed with pEGFP-N1/X124G. After these two vectors were cotransfected into 293T cells, the flag protein was assessed by Western blotting to analyze the knockdown effect of pGCSIL-GFP-shMyocd. The expression of myocardin and SM22α was also detected by RT-PCR and Western blotting after the pGCSIL-GFP-shMyocd viruses were transfected into primary cultured rat aortal VSMCs.RESULTS: The rat myocardin lentviral RNAi vector pGCSIL-GFP-shMyocd and myocardin-overexpression vector pEGFP-N1-Myocd were successfully constructed. After these two kinds of vectors were cotransfected into 293T cells,the No.1 interfering vector displayed the highest inhibitory effect on flag expression.After the No.1 lentvirus at the titer of 1×10¹² TU/L was transfected into VSMCs, the myocardin and SM22α expression was significantly attenuated. CONCLUSION: The lentiviral pGCSIL-GFP-shMyocd RNAi vector is successfully constructed, which is useful for further study regarding the molecular mechanism of the phenotypic switching in VSMCs under special pathological conditions such as atherosclerosis. Inhibition of myocardin expression in VSMCs leads to the decrease in the expression of differentiation marker, and implies a crucial role of myocardin in VSMCs differentiation.  相似文献   

Resolving the urban nest predator paradox: The role of alternative foods for nest predators     

Christine M. Stracey 《Biological conservation》2011,(5):1545-1552

Urbanization is a leading cause of species endangerment in the United States; however, certain species thrive in urban habitats. The loss of key predators or the addition of new predators in urban areas could alter the structure of urban communities. A reduction in nest predation is hypothesized to explain the high density of urban birds, yet urban areas typically have increased populations of avian nest predators. The loss of important nest predators in urban habitats, prey switching of urban predators, or successful nest defense against avian nest predators could explain this urban nest predator paradox. To assess these hypotheses I compared nest predation rates of Northern mockingbirds (Mimus polyglottos) in parking lots and residential neighborhoods to populations in pastures and wildlife preserves during 2007–2009 in Florida, USA and placed video cameras on a subset of nests in 2008–2009. Data do not support the hypothesis that urban nest predation rates are consistently lower than non-urban nest predation rates. Of the 56 nest predation events recorded, cats were the dominant urban predator and Cooper’s hawks (Accipiter cooperii) were the dominant non-urban predator. There was no evidence for a loss of important nest predators in urban habitats; however, prey switching by Cooper’s hawks likely occurred. There was also indirect evidence for the importance of nest defense. Furthermore, some of the cats recorded as nest predators in residential neighborhoods were owned cats and all but one cat predation event occurred at night. To reduce nest predation rates, cat owners should keep their cats indoors at night.  相似文献