Marine Chemistry, 37 (1992) 291-292 Elsevier Science Publishers B.V., Amsterdam Contents Marine Chemistry, Vol. 37 (1992) Obituary Research Papers Fuel cell hydrogen sensor for marine applications F.J. Sansone (Honolulu, HI, USA) Photo-reduction of Fe(III) by dissolved organic substances and existence of Fe(II) in seawater during spring blooms K. Kuma, S. Nakabayashi, Y. Susuki, I. Kudo and K. Matsunaga (Hakodate, Japan ) Dynamics of dimethyl] sulfide and dimethylsulfoniopropionate oceanic water samples RiP: Keserie OSarpcles Nake: CoA CISA osc scissccccacegceccussanchahsactopana scdsdacestessictadaaactetsaen uarmeevuseaies Z Sunlight-induced compositional alterations in the seawater-soluble fraction of crude oil M.G. Ehrhardt (Kiel, Germany), K.A. Burns (Ferry Reach, Bermuda) and M.C. Bicego (Sao Paulo, Brazil) Spectrophotometric determination of dissolved manganese in natural waters with 1-(2- pyridylazo )-2-naphthol: application to analysis in situ in hydrothermal plumes C.S. Chin, K.S. Johnson and K.H. Coale (Moss Landing, CA, USA) Estuarine distributions of dissolved titanium S.A. Skrabal, W.J. Ullman and G.W. Luther, III (Lewes, DE, USA) Directly observed particulate fluxes of Cd, Ni, and Cu in pelagic oceans: implication of two different settling particles S. Noriki and S. Tsunogai (Hakodate, Japan) Isolation and characterization of sedimentary and synthetic highly branched Cy and C5 monoenes S.J. Hird, R. Evens and S.J. Rowland (Plymouth, UK) Polypeptide models of the arthropodin protein of the barnacle Balanus balanoides H. Yamamoto and A. Nagai (Ueda, Japan ) Guide for Authors Electron spin resonance investigations of Mn compounds and free radicals in particles from the Seine river and its estuary A. Boughriet, B. Ouddane and M. Wartel (V illeneuve d’Ascq, France) Reactive mercury on the Scotian Shelf and in the adjacent northwest Atlantic Ocean J.A. Dalziel (Dartmouth, N.S., Canada) Gran linearization of potentiometric Winkler titration L.G. Anderson, C. Haraldsson and R. Lindegren (G6teborg, Sweden ) The fluorescence of dissolved organic matter in seawater R.F. Chen and J.L. Bada (La Jolla, CA, USA) Improved amino acid quantification in environmental samples: charge-matched recovery standards and reduced analysis time GEL. Cowre and), ). Hessen €Seattic; WA, USA) oc ccscicsscsecsccseasessansasacaisssanesevescecsaccusdacvecsaseassese 223 Determination ofd issolved nucleic acids in seawater by the fluorescence dye, ethidium bromide S:Salcanicnandl A: Wetaieaterih) CR ORVt hsT aint bce ace assess isescseieeacencadeccadvascessyssacoecastaxentonesanetnicetas 239 292 Removal of linear alkylbenzenesulfonates (LAS) in the Tamagawa Estuary H. Takada and N. Ogura (Tokyo, Japan) Dissolved organic carbon in waters of the Polar Frontal Zone of the Atlantic Antarctic in the spring—summer season of 1988-1989 E.V. Dafner (Moscow, Russia) Book Reviews Productivity of the Ocean Biogeochemistry Corrigendum Contents of Volume 37