Dissolved free amino acids

Pocklington R (1970) A new method for the determination of amino acids in sea water and an investigation of the dissolved free amino acids of North Atlantic Ocean waters. PhD Dissertation. Dalhousie University, pp 1-102... 

Mopper [265] has described developments in the reverse phase performance liquid chromatographic determination of amino acids in seawater. He describes the development of a simple, highly sensitive procedure based on the conversion of dissolved free amino acids to highly fluorescent, moderately hydrophobic isoindoles by a derivatisation reaction with excess o-phthalaldehyde and a thiol, directly in seawater. Reacted seawater samples were injected without further treatment into a reverse-phase high-performance liquid chromato-... 

TABLE IV Dissolved Free Amino Acids in Aquatic Ecosystems... 

Fuhrman, J. 1990. Dissolved free amino acid cycling in an estuarine outflow plume. Marine Ecology Progress Series 66 197-203. 

Fuhrman, J., and T. M. Bell. 1985. Biological considerations in the measurement of dissolved free amino acids in seawater and implications for chemical and microbiological studies. 

Fuhrman, J. A., and R. L. Ferguson. 1986. Nanomolar concentrations and rapid turnover of dissolved free amino acids in seawater agreement between chemical and microbiological measurements. Marine Ecology Progress Series 33 237-242. 

Jorgensen, N. O. G., N. Kroer, R. B. Coffin, X.-H. Yang, and C. Lee. 1993. Dissolved free amino acids, combined amino acids, and DNA as sources of carbon and nitrogen to marine bacteria. Marine Ecology Progress Series 98 135—148. 

Keil, R. G., andD. L. Kirchman. 1991. Contribution of dissolved free amino acids and ammonium to the nitrogen requirements of heterotrophic bacterioplankton. Marine Ecology Progress Series 73 1-10. 

Middleboe, M., N. H. Borch, and D. L. Kirchman. 1995b. Bacterial utilization of dissolved free amino acids, dissolved combined amino acids and ammonium in the Delaware Bay estuary Effects of carbon and nitrogen limitation. Marine Ecology Progress Series 128 109-120. 

Riemann, B., N. O. G. Jorgensen, W. Lampert, and J. A. Fuhrman. 1986. Zooplankton induced changes in dissolved free amino acids and in production rates of freshwater bacteria. 

Concentrations, turnover, and uptake of free amino acids probably have been examined more extensively than any other DOM component. For several decades it has been possible to measure turnover of dissolved free amino acids (DFAA) from the uptake of 14C- or3H-labeled amino acids (e.g., Azam and Holm-Hansen, 1973). Equally important was the development... 

Crawford, C. C., J. E. Hobbie, and K. L. Webb. 1974. The utilization of dissolved free amino acids by estuarine microorganisms. Ecology 55 551-563. 

Rosenstock, B., and M. Simon. 2002. Sources and sinks of dissolved free amino acids and protein in a large and deep mesotrophic lake. Limnology and Oceanography 46 644—654. 

DFAA, dissolved free amino acids DCAA, dissolved combined amino acids TDCHO, total dissolved combined carbohydrates DPA, dissolved primary amines. 

Fiebig, D. M. 1992. Fates of dissolved free amino acids in groundwater discharged through streambed sediments. Hydrobiologia 235/236 311-319. 

Beckmann M., Harder T., and Qian, P.Y., Induction of larval attachment and metamorphosis in the serpulid polychaete Hydroides elegans by dissolved free amino acids mode of action in laboratory bioassays, Mar. Ecol. Prog. Ser, 190, 167, 1999. 

Glu 6, a major constituent of dissolved free amino acids (DFAA) in marine sediments [71], has been detected in red algae (Rhodophyta) [72] and as a potential osmolyte in several marine bacteria, for example obligatory aerobic heterotrophs [70] and methanogenic archaebacteria [8], N-methyl-/ -glutamate has been reported solely as a natural product from the cyanobacterium Prochloron didemni [96]. 

Figure 8.5 Experimental fluxes of NELt-1-, NO3U dissolved organic nitrogen (DON), urea, dissolved free amino acids (DFAA), and dissolved combined amino acids (DCAA) across the sediment-water interface in cores collected in Hog Island Bay (USA). (Modified from Tyler et al., 2003.)...

Figure 9.36 Concentrations ( iM) of total dissolved free amino acids (TDAA) versus depth in (a) winter and (b) summer cores from Cape Lookout Bight (USA). (Modified from Burdige and Martens, 1990.)...

Burdige, D.J., and Martens, C.S. (1990) Biogeochemical cycling in an organic-rich coastal marine basin 11. The sedimentary cycling of dissolved, free amino acids. Geochim. Cosmochim. Acta 54, 3033-3052. 

Gardner, W.S., and Hanson, R.B. (1979) Dissolved free amino acids in interstitial waters of Georgia salt marsh soils. Estuaries 2, 113-118. 

Jprgensen, N.O.G. (1984) Microbial activity in the water-sediment interface assimilation and production of dissolved free amino acids. Oceanus 10, 347-365. 

Landen, A., and Hall, P.O.J. (2000) Benthic fluxes and pore water distributions of dissolved free amino acids in the open Skagerrak. Mar. Chem. 71, 53-68. 

Mopper, K., and Lindroth, P. (1982) Diel and depth variations in dissolved free amino acids and ammonium in the Baltic Sea determined by shipboard HPLC analysis. Limnol. Oceanogr. 27, 336-347. 

Clark, M.E., Jackson, G.A., and North, W.J. Dissolved free amino acids in Southern California coastal waters, Limnol. Oceanogr. 17, 749-758 (1972). 

Table 7.1 Summary of selected nitrogen (NOj", NO2, NH +, urea, dissolved free amino acids [DFAA], DON) uptake rates from the major ocean basins, and upwelling, coastal and estuarine systems using tracer techniques. Rates were converted to common units (nmol N L" using data provided in the original publication or using conversion factors specified in the footnotes... 

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