Technogenic stress and its effect on deciduous trees (an example from parks in Yaroslavl)

A comparative analysis of several morphological, physiological, and biochemical characteristics of leaves has been performed in birch (Betula pendula Roth), linden (Tilia cordata Mill.), and poplar (Populus nigra L.) trees growing in industrial areas of Yaroslavl with different levels of anthropogenic pollution. The results show that high concentrations of pollutants in the atmosphere suppress the growth of leaves, and the number and severity of necrotic lesions in them increase. Water content in leaves becomes lower, whereas ash content increases. The contents of photosynthetic pigments change as well: the leaves contain smaller amounts of chlorophylls a and b, whereas the accumulation of carotenoids increases. Judging from changes in the test parameters, P. nigra is more resistant to pollution than B. pendula and T. nordata.     

百喜草茎叶发酵前后甲醇溶提物对离体条件下AM真菌的生长效应

发酵前后百喜草（Paspalum notatum Fl     

Influence of furfural concentration on growth and ethanol yield of Saccharomyces kluyveri

Furfural is an important inhibitor in ethanol fermentation process using lignocellulosic hydrolysates as raw materials. In order to find out the furfural concentration range in which furfural inhibits the fermentation process, we used one strain Saccharomyces kluyveri selected from soil and cultured in several different furfural content media under low glucose concentration condition. Experiment results showed that microorganism growth was stimulated and dry cell weight increased when furfural concentration in the medium was 0.25 mg/ml. Furfural had negative effect on cell growth when its concentration was above 1.00 mg/ml. At the same time, the strain growed better and had a higher glucose consumption rate in 5% original glucose concentration condition than in 3% original glucose concentration condition. The results showed that appropriate exaltation of original glucose concentration in stalk hydrolysates will increase the strain resistance to furfural.     

Water Discoloration in Alexandria, Egypt, April 1993. I. Occurrence of Prorocentrum Triestinum Schiffer (Red Tide) Bloom and Associated Physical and Chemical Conditions

A yellow-brown coloration of water developed in the Eastern Harbour of Alexandria (Egypt) during April 1993. the dinoflagellate Prorocentrum triestinum, the causative organism, culminated in a population peak of 71-10⁶ cells 1^-1, chlorophyll a nearly 361 μgl^-1. the bloom occurred with a thermohaline stratified water column and low surface nutrient levels. Water temperature was considered a crucial environmental factor controlling the occurrence of P. triestinum and nitrate was significantly correlated with its counts. the high relative growth constant (3.4 d^-1), calculated just prior to the massive occurrence of the species, explains the rapid development of the bloom. A comparison with the earlier phytoplankton studies in the harbour is made.     

环境规制对中国工业绿色增长指数的影响

为衡量工业增长对资源的消耗和环境的污染,本文构建了"工业绿色增长指数",并运用基于松弛测度的方向距离函数(SBMDDF)对2007-2011年中国30省(区、市)进行测算,根据得分将其分成高绿化度地区、中绿化度地区和低绿化度地区;采用面板数据模型测算了行政型、市场型和公众参与型这三种类型的环境规制对工业绿色增长指数的影响,同时考察技术创新、工业结构对工业绿色增长的作用程度。研究发现:东部地区的工业绿色增长指数高于中西部地区;行政型和市场型环境规制对工业绿色增长的作用显著,市场型环境规制在高、中绿化度地区起主要作用,而低绿化度地区以行政型环境规制为主;公众参与型环境规制对工业绿色增长的作用有限;技术创新和工业结构也是影响工业绿色增长的重要因素。为促进工业绿色发展,中西部地区要树立绿色、低碳的理念对东部地区所转移的产业进行选择;高绿化度地区需在提高排污费标准的同时,逐步采用排污权交易等方式加大对环境污染总量的控制力度;低绿化度地区可在实行低标准排污费政策的同时,逐步实现从行政型向市场型环境规制的转变;逐步发挥并扩大公众参与型环境规制的作用;注重与节能减排相关的技术吸收和应用推广,降低高载能行业的比重。     

Double dividend of carbon intensity: environmental-quality improvement and sustainable economic growth

This paper established an equilibrium model including representative household, government, and eight industries, and two different environmental policy tools such as carbon intensity and carbon cap were added into the model. The paper points out that the carbon intensity policy imposed on major high-emission industries achieved double dividend of environmental-quality improvement and sustainable economic growth under the condition of proper constraint target. This result supports the environmental Porter hypothesis. This paper finds out that the double dividend is due to the fact that environmental governance policy leads to the rising price of resources and demand of labors, resulting in an effective redistribution of production factors among industries and sustainable economic growth. Furthermore, this paper estimates the marginal effect of economic structure on carbon emission and carbon intensity and provides targeted suggestions.