16830758

Source:http://linkedlifedata.com/resource/pubmed/id/16830758

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0016315, umls-concept:C0038817, umls-concept:C0747055, umls-concept:C0871161, umls-concept:C1280500, umls-concept:C1522449, umls-concept:C1549535
pubmed:issue	3
pubmed:dateCreated	2006-7-11
pubmed:abstractText	Three-dimensional excitation emission matrix fluorescence spectroscopy (3DEEM) was used to investigate the effect of sunlight irradiation on the fluorescence properties of dissolved organic matter (DOM) from Lake Hongfeng and Nanming River waters and a commercial fluka humic acid (FHA). The results show that the DOM samples and FHA fluorescence properties changed under sunlight irradiation. Interestingly, the photodegradation characteristics were different between aquatic DOM and FHA. The fluorescence intensity of the apparent peaks A, B and C of lake and river water DOM decreased with sunlight irradiation. The initial 3DEEM of Fluka HA had only one fluorescence peak at lamda ex / lamda em = 275/500 nm, while two fluorescence peaks occurred at lamda ex / lamda em = 245/450 nm and 310/450 nm, respectively, after sunlight irradiation. lamda ex and lamda maxima of DOM decreased during 7 days of sunlight irradiation. Changes in r(A, C) of DOM and FHA with sunlight irradiation time suggest that fluorescence peaks A and C had different fluorescence loss rates, while peak C fluorophores were more susceptible to sunlight irradiation. FHA appeared to be less susceptible to photodegradation, and its r(A, C) remained almost the same before and after sunlight irradiation.
pubmed:language	chi
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/9424805
pubmed:status	PubMed-not-MEDLINE
pubmed:month	Mar
pubmed:issn	1000-0593
pubmed:author	pubmed-author:BaiYing-chenYC, pubmed-author:FuPing-qingPQ, pubmed-author:LiuCong-qiangCQ, pubmed-author:WangJingJ, pubmed-author:WangLi-yingLY, pubmed-author:WuFeng-changFC, pubmed-author:XuChengC
pubmed:issnType	Print
pubmed:volume	26
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	471-4
pubmed:year	2006
pubmed:articleTitle	[Effect of sunlight irradiation on fluorescence properties of dissolved organic matter].
pubmed:affiliation	The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China.
pubmed:publicationType	Journal Article, English Abstract