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	1. Study on the interaction locations between Humic acid and Pyrene
	MA Xingke,PENG Jinghe,ZHU Yaxian,WU Fang,ZHANG Yong
	Environmental Science and Techology 05 February 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:IFluorescence quenching method was employed to determine the binding constant (Koc) of Humic acid (HA) - Pyrene (Py). The effects of pH value, ionic strength and heavy metal (HM) ions on the Koc were investigated and used to discuss the interaction mechanism between HA and Py. A fluorescent probe method was established and firstly applied to study the interaction between HA and Py by investigating the variation of I1/I3 with the chemical conditions of HA solution. Experimental results indicated that I1/I3 values showed an opposite trend compared to that of Koc, but an identical explanation on the interaction between HA and Py was obtained. The effects of HM ions on the interaction between HA and Py were dependent on the binding sites of HA and HM ions which was located at the carboxyl and hydroxyl. 1H NMR was applied to search for the binding site between HA and Py which was located at aliphatic chain of the HA.n this paper.
	TO cite this article:MA Xingke,PENG Jinghe,ZHU Yaxian, et al. Study on the interaction locations between Humic acid and Pyrene[OL].[ 5 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4465128


	2. The exchange of acetaldehyde between the atmosphere and plants and its forming mechanism
	Huang Juan
	Environmental Science and Techology 30 June 2008
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	Abstract:The exchange of acetaldehyde between atmosphere and plant leaves includes three processes: 1) acetaldehyde is emitted from plant leaves; 2) acetaldehyde in the atmosphere deposits to the leaf-surface; and 3) acetaldehyde is absorbed and metabolized by plants. The physiological and environmental factors which controlling these processes were reviewed. Acetaldehyde emission from plants in some unfavorable environment functions as external signal for within-plant communication, serving also a systemic response to local damage. The mechanism of acetaldehyde production was also discussed. With the capability of absorbing acetaldehyde, plants can be used to detoxify the air. Phytoremediation will be one of the most promising approaches for cleaning up the air organic pollutants. While, plants are also important pools of acetaldehyde production, especially under environmental stresses such as flooding and anaerobic condition.
	TO cite this article:Huang Juan . The exchange of acetaldehyde between the atmosphere and plants and its forming mechanism[OL].[30 June 2008] http://en.paper.edu.cn/en_releasepaper/content/22558

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