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贯彻科学发展观,构建和谐社会,关键在于联系实际,落到实处。“两会”期间,本刊记者专访了四位全国人大代表、政协委员,请他们结合工作实际,从不同角度畅谈贯彻科学发展观,构建和谐社会的做法和体会。 相似文献
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在新的历史条件下,如何以科学的发展观,统一社会各界的思想认识,保证退耕还林工程科学、有效地实施,使退耕还林的效益最大化并保持可持续性。 相似文献
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由中国国土经济学研究会发起并主办,本刊承办的“我心中的中华名山”推选活动,经过五个多月的前期准备和选票回收统计,10月25日,专家评审委员会在群众投票的基础上评选出中华十大名山。经有关部门批准,本次活动组委会将于明年年初在人民大会堂举行揭晓仪式。在揭晓仪式之前,本刊记者对活动评审委员会主任、全国人大常委、中国科学院院士孙鸿烈先生进行了专访。 相似文献
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Microcystins(MCs) are cyclic hepatotoxic peptides produced by the bloom-forming cyanobacterium Microcystis and present a public health hazard to humans and livestock. The removal of MCs from contaminated water with powdered activated carbon(PAC) has been employed as a simple and economic treatment strategy. In this study, PAC-Fe(Ⅲ) was prepared and utilized for the fast and efficient removal of MCs from water. PAC-Fe(Ⅲ) exhibited superior microcystin-LR(MC-LR) removal capacity and efficiency compared to the unmodified PAC. The MC-LR removal efficiency of PAC-Fe(Ⅲ) increased with decreasing p H within the pH range of 4.3 to 9.6. PAC-Fe(Ⅲ) could be reused for 3 times by methanol elution while the MC-LR removal efficiency was still over 70 percent. The removal efficiency was positively correlated to the ionic strength of water and negatively correlated to alkalinity. Natural organic matter(NOM) such as humic acid(HA) and salicylic acid(SA) generated low interference with MC-LR adsorption by PAC-Fe(Ⅲ). The complexation reaction between Fe~(3+) in PAC-Fe(Ⅲ) and the functional groups of MCLR was suggested as the key mechanism of MC-LR removal by PAC-Fe(Ⅲ). The results suggest that Femodified PAC is a promising material for the treatment of MC-contaminated waters. 相似文献
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金银器的真伪鉴别主要包括两个方面,一是对其材料质地的鉴别,二是对其制造年代的鉴别。根据现在的科学技术手段,对金银器质地的鉴别已能做出比较精确的制定。对金银器材料质地的鉴别,从经验上亦积累了一些简便易行的方法。 相似文献