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531.
低碳经济与“两型社会”的相关性及指标研究 总被引:2,自引:0,他引:2
能源和环境是本世纪紧密关联的两个最重要问题,因此发展低碳经济,建设“两型社会”是中国寻求自身进一步发展的必经之路。首先在分析低碳经济与“两型社会”理念内涵的基础上,揭示了两者的关系,它们虽然是两个独立的概念,但也存在紧密联系;其次在“两型社会”建设中融入低碳经济发展的“脱钩”指标,它和其他指标一起评价“两型社会”的建设成果,是判断“两型社会”是否成功的重要标志。本文选择的低碳经济发展的“脱钩”指标主要包括能源消耗与经济增长的“脱钩”指标以及二氧化碳排放与经济增长的“脱钩”指标。这些低碳发展评价指标不仅能够反映经济增长与资源环境变化的响应关系,还能进一步评价“两型社会”建设成果,具有深远的理论和实践意义。 相似文献
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概述了环境影响评价制度的涵义,分析了传统公众参与环境影响评价制度的缺失,并提出解决机制缺失的对策,尤其强调工业生态学理念的重要性。环境评价与环境公共政策的有机结合对于环境影响评价制度的完善有着较强的理论可操作性与实践意义. 相似文献
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Bisphenol A (BPA) is a chemical with high production volume and wide applications in many industries. Although BPA is known
as an endocrine disruptor, its toxic mechanisms have not been fully characterized. Due to its structural similarity to thyroid hormones
thyroxine (T4) and triiodothyronine (T3), one possible mechanism of BPA toxicity is disruption of hormone transport by competitive
binding with the transport proteins. In this study, the binding interactions of BPA, T4, and T3 with three thyroid hormone transport
proteins, human serum albumin (HSA), transthyretin (TTR), and thyroxine-binding globulin (TBG) were investigated by fluorescence
measurement. Using two site-specific fluorescence probes dansylamide and dansyl-L-proline, the binding constants of BPA with HSA
at drug site I and site II were determined as 2.90 104 and 3.14 104 L/mol, respectively. By monitoring the intrinsic fluorescence
of tryptophan, a binding constant of 4.70 103 L/mol was obtained. Similarly, by employing 8-anilino-1-naphthalenesulfonic acid as
fluorescence probe, the binding a nity of BPA with TTR and TBG was measured to be 3.10 105 and 5.90 105 L/mol, respectively.
In general, BPA showed lower binding a nity with the proteins than T3 did, and even lower a nity than T4. Using these binding
constants, the amount of BPA which would bind to the transport proteins in human plasma was estimated. These results suggest that
the concentrations of BPA commonly found in human plasma are probably not high enough to interfere with T4 transport. 相似文献
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Sulfamethoxazole (SMX) is one of the most common detected antibiotics in the environment. In order to study whether SMX can
a ect behavior and growth and whether these e ects could be transferred to the progeny, Caenorhabditis elegans was exposed at
environmentally relevant concentrations for 24, 48, 72 and 96 hr, respectively. After exposure, the exposed parent generation (P0)
was measured for behavior and growth indicators, which were presented as percentage of controls (POC). Then their corresponding
unexposed progeny (F1) was separated and measured for the same indicators. The lowest POC for P0 after 96 hr-exposure at 100
mg/L were 37.8%, 12.7%, 45.8% and 70.1% for body bending frequency (BBF), reversal movement (RM), Omega turns (OT) and
body length (BL), respectively. And F1 su ered defects with the lowest POC as 55.8%, 24.1%, 48.5% and 60.7% for BBF, RM, OT
and BL, respectively. Defects in both P0 and F1 showed a time- and concentration-dependent fashion and behavior indicators showed
better sensitivity than growth indicator. The observed e ects on F1 demonstrated the transferable properties of SMX. Defects of SMX
at environmental concentrations suggested that it is necessary to perform further systematical studies on its ecological risk in actual
conditions. 相似文献
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面对日益严重的环境问题和急迫的国际形势,我们必须改变利用资源和对待环境的传统方式,加强环境管理,不断增强可持续发展能力,以实现经济、社会与人口、资源、环境的持续协调发展。 相似文献
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