政府职能在发展绿色生态建筑中的作用

近年来,绿色建筑成为国内乃至国际建筑界、房地产界的一个热点话题,绿色建筑的发展也越来越受到关注,许多国家都开展了绿色建筑的研究和实践,取得了很多的研究成果.尤其在去年经历了一场与"非典"的斗争之后,人类更加深刻地认识到绿色建筑在生活中的重要性,由此也引发了一场关于绿色建筑的革命,将绿色建筑向更深入、更科学的方向推进.     

海洋药物海藻Fe-SOD

超氧化物歧化酶是一种金属酶类,根据所含金属辅基不同,分为Cu、Zn-SOD,Fe-SOD,Mn-SOD和Ni-SOD四类.其中Cu、Zn-SOD主要存在于真核细胞的细胞浆中,如猪血、鸭血、猪肝等动物血液和内脏器官等组织中;Mn-SOD存在于真核细胞的线粒体、细菌中;Fe-SOD只存在于原核细胞中,如海藻中的螺旋藻、铁钉叶等;Ni-SOD是最近发现只存在于某些极少数原核细菌中.     

如何防治鱼类水体"毒水症"

溶氧超标"毒水症" 危害及症状:水体中因施放过多未经发酵的肥料,生肥在塘底分解出很细小的甲烷和硫化氢的小气泡,鱼苗误当食物吞入.其主要症状是:鱼鳃上会粘附许多小气泡,使鱼体上浮或游动失去平衡.鱼的肠道中有白色气泡,或鱼的体表、鳍条、鳃丝上附有较多的气泡,鱼体漂浮水面,沉不下去,严重的可致鱼类成批死亡.     

Spatial Para Allocation of a Small Watershed Protection Forest System

With the interpreted IKONOS4 satellite images collected in 2005,a 1:10 000 forest map,the data collected in ClassⅡforest survey in 2007,and surface runoff data obtained in the permanent runoff monitoring station,six site factors of slope gradient, slope position,soil thickness,soil thickness of A layer,soil type and soil water content were selected to establish a matter element model suitable to 297 forest sub-compartments.Further,the AHP was applied to modify the spatial structure and form the spatial para allocation of the protection forest system. The results showed that:1) the area allocation of different vegetation types was irrational,the area of a mixed coniferous and broad-leafed forest was 124.39 ha,accounting for 14.97%of the forested land,the mixed forest was consisted of two coniferous species accounted for 27.37%of the total forest land,and the pure forest was consisted of one coniferous species accounted for 42.48%.2) After optimization,the area allocation of different vegetation types in the protection forest system ranked as:the mixed coniferous and broad-leafed forest(31.12%)>shrub land(15.5%)>the economic tree crops(12.28%)>the mixed forest consisting of two coniferous species(11.46%)>the pure broad-leafed forest(11.41%)>the pure coniferous forest(9.51%)>grass land(8.70%). Besides,the annual surface runoff could reduce 43 171 mm or 62.15%,annual soil erosion could decrease 465.97 t or 79.66%.3) The following suggestions for spatial para allocation of the small watershed protection forest system were proposed: (1) Reducing pure cypress or pine forest,and increasing alder-cypress,oak-cypress or pine-cypress mixed forest.As for the current cypress and pine pure forests,alder or oak could be introduced to develop a mixed forest.(2) The canopy closure of pure cypress forest and alder-cypress forests should be maintained within 0.60-0.75,and the canopy closure of oak-cypress,pine-cypress or oak-pine forests should be controlled within 0.60-0.80. (3) For improvement of current pure     

多功能水箱

多功能水箱,绿色、环保、安全、方便,提高了水质,促进使用者的身体健康.该水箱代替了水缸、水桶、水壶、暖水瓶,纯净水机,悬挂在壁角上,不占用地面面积.     

中小企业财务管理面临的问题及对策

中小企业是中国国民经济的重要组成部分,在国家经济生活中占有极其重要的地位.中小企业要快速、稳定、健康地发展,必须要清醒地认识到财务管理在企业经营中的重要地位和作用,本文针对当前我国中小企业财务管理方面存在的问题,从几个方面进行了分析,并提出了相应的措施.     

Carbon storage of a subtropical forest ecosystem: a case study of the Jinggang Mountain National Nature Reserve in south-eastern China

The carbon cycle of forest ecosystems plays a key role in regulating CO2 concentrations in the atmosphere. Research on carbon storage estimation of forest ecosystems has become a major research topic. However, carbon budgets of subtropical forest ecosystems have received little attention. Reports of soil carbon storage and topographic heterogeneity of carbon storage are limited. This study focused on the Jinggang Mountain National Nature Reserve as an example of a mid-subtropical forest and evaluated soil and vegetation carbon storage by field sampling combined with GIS, RS and GPS technology. We classified the forest into nine forest types using ALOS high-resolution remote sensing images. The evergreen broad-leaved forest has the largest area, occupying 26.5% of the total area, followed by coniferous and broad-leaved mixed forests and warm temperate coniferous forest, occupying 24.2 and 22.9%, respectively. The vegetation and soil carbon storage of the whole forest ecosystem were 1,692,344 and 5,514,707 t, with a carbon density of 7.4 and 24.2 kg/m^2, respectively, which suggests that the ecosystem has great carbon storage capacity. The topographic heterogeneity of the carbon storage was also analysed. The largest vegetation storage and soil storage is at 700–800 and 1000–1100 m, respectively. The vegetation carbon storage is highest in the southeast, south and southwest.     

毛叶山桐子的快速播种育苗技术

毛叶山桐子(Idesia polycarpa Maxim.var.vestita Diels)大风子科山桐子属,落叶乔木,树干通直,侧枝长,树型美观.叶互生,宽卵形至卵状心形,端尖;边缘有疏锯齿,掌状基出脉5～7,叶片下面密生短柔毛或密毡毛,叶柄与叶等长,顶端有2突起的腺体;花多为单性,黄绿色,有香味,下垂圆锥花序;浆果球形,其果色为红色或黑色.     

绿博会优惠承诺

1.绿博会筹备和举办期间,承担全国绿委在郑州举行的各类会议、活动费用。2.各参展团室外建园,建园面积不少于1500平方米,给予人民币10万元补贴,并提供东风日产帕拉丁越野车(ZN6453WAG3型标     

分享比拥有更重要

前两天,在一家网站的涂鸦馆里看到这样一幅图画:一个小牛形状的面包被切成几片站立在我的面前。作者为它的创意起了一个名字叫"分享",意思是面包要一起食用。图画下面一位网友的跟帖引起了我的注意。