By Sasha Madronich, Siri Flocke (auth.), Dr. Pierre Boule (eds.)

The authors current the cutting-edge of photochemical mechanisms and tactics of environmental relevance. the quantity contains new info e.g. at the sun spectrum and most recent options for the research of short-life reactive species. specific chapters care for organic ingredients in marine medium and photocatalysis in cleansing processes.

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These conclusions have been confirmed by other steady state and flash studies [24-27] and the technique has been applied to other systems including 3- and 4-bromophenol [28-30]. 2 Nanosecond Laser Flash Photolysis Although the conventional technique still has much to commend it, most laboratories now tend to use nanosecond laser flash photolysis because of the lOoo-fold improvement in time resolution that this affords. , a neodymium/YAG laser limits the excitation wavelengths that are available but this is not usually problematic.

Kondratyev KY (1969) Radiation in the atmosphere. Academic Press New York 44. Blumthaler M,Ambach W (1988) Photchem Photobiol48:85 45. Doda DD, Green AES (1980) Appl Opt 19:2140 46. Dickerson RR, Stedman DH, Delany AC (1982) J Geophys Res 87: 45,933 47. Coulson KL, Reynolds DW (1971) J Appl Met 10: 1285 48. McKenzie RL, Kotkamp M, Ireland W (1996) Geophys Res Lett 23: 1757 49. Shetter RE, McDaniel AH, Cantrell CA, Madronich S, Calvert JG (1992) J Geophys Res 97:10,349 50. Doda DD, Green AES (1981) Appl Opt 20:636 51.

31 4 Flash Photolysis Techniques . . . . . 1 Conventional Flash Photolysis . . . . . . . . . . .. 2 Nanosecond Laser Flash Photolysis . . . . . . . . . 3 Picosecond and Femtosecond Laser Flash Photolysis 34 40 44 5 50 Measurement of Fluorescence Kinetics . . . . References 59 1 Introduction Interest in environmental photochemistry has exploded in the last twenty years due to legislative requirements and an increased public awareness with respect to environmental matters generally.

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