Origin and palaeoenvironmental significance of C25 and C27 n-alk-1-enes in a 25,000-year lake-sedimentary record from equatorial East Africa von van Bree, L.G.J., Rijpstra, W.I.C., Cocquyt, C., Al-Dhabi, N.A., Verschuren, D., Sinninghe Damsté, J.S., de Leeuw, J.W.

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The molecularly-uncharacterized component of nonliving organic matter in natural environments von Hedges, J.I, Eglinton, G, Hatcher, P.G, Kirchman, D.L, Arnosti, C, Derenne, S, Evershed, R.P, Kögel-Knabner, I, de Leeuw, J.W, Littke, R, Michaelis, W, Rullkötter, J

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Risk factors for third degree perineal ruptures during delivery von de Leeuw, J.W, Struijk, P.C, Vierhout, M.E, Wallenburg, H.C.S

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Sterols of four dinoflagellates from the genus Prorocentrum von Volkman, J.K, Rijpstra, W.I.C, de Leeuw, J.W, Mansour, M.P, Jackson, A.E, Blackburn, S.I

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The role of mediolateral episiotomy during operative vaginal delivery von Sultan, A.H., Thakar, R., Ismail, K.M., Kalis, V., Laine, K., Räisänen, S.H., de Leeuw, J.W.

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The association of obstetric anal sphincter injury and mediolateral episiotomy with increasing birth weight and duration of second stage of labour in spontaneous vaginal delivery von van Bavel, J., Ravelli, A.C.J., Roovers, J.P.W.R., Abu-Hanna, A., Mol, B.W., de Leeuw, J.W.

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Risk indicators for obstetrical anal sphincter injury in vaginal birth after caesarean section compared to first vaginal delivery von van Bavel, J., Ravelli, A.C.J., Roovers, J.P.W.R., Abu-Hanna, A., Mol, B.W., de Leeuw, J.W.

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Stable carbon and radiocarbon isotope compositions of particle size fractions to determine origins of sedimentary organic matter in an estuary von Megens, L, van der Plicht, J, de Leeuw, J.W, Smedes, F

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Des-A-lupane in an East African lake sedimentary record as a new proxy for the stable carbon isotopic composition of C3 plants von van Bree, L.G.J., Rijpstra, W.I.C., Al-Dhabi, N.A., Verschuren, D., Sinninghe Damsté, J.S., de Leeuw, J.W.

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Reactivity of organic matter in aquifer sediments: geological and geochemical controls 1 1Associate editor: P. A. Maurice von Hartog, N, van Bergen, P.F, de Leeuw, J.W, Griffioen, J

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Hands up if you do not understand hands on von Manresa, M., Kalis, V., de Tayrac, R., de Leeuw, J.W., Laine, K., Räisänen, S., Ismail, K.M.

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Origin, formation and environmental significance of des-A-arborenes in the sediments of an East African crater lake von van Bree, L.G.J., Islam, M.M., Rijpstra, W.I.C., Verschuren, D., van Duin, A.C.T., Sinninghe Damsté, J.S., de Leeuw, J.W.

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A cadinene biopolymer in fossil and extant dammar resins as a source for cadinanes and bicadinanes in crude oils from South East Asia von Van Aarssen, B.G.K., Cox, H.C., Hoogendoorn, P., De Leeuw, J.W.

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Biotransformation pathways of phytol in recent anoxic sediments von Grossi, V, Hirschler, A, Raphel, D, Rontani, J.-F, De Leeuw, J.W, Bertrand, J.-C

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The occurrence of polycyclic sesqui-, tri-, and oligoterpenoids derived from a resinous polymeric cadinene in crude oils from southeast Asia von van Aarssen, B.G.K., Hessels, J.K.C., Abbink, O.A., de Leeuw, J.W.

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Selective preservation of chitin during the decay of shrimp von Baas, M., Briggs, D.E.G., Van Heemst, J.D.H., Kear, A.J., De Leeuw, J.W.

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Cyclic diaryl ethers in a Late Permian sediment von Sephton, M.A, Looy, C.V, Veefkind, R.J, Visscher, H, Brinkhuis, H, de Leeuw, J.W

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Des-A-lupane in an East African lake sedimentary record as a new proxy for the stable carbon isotopic composition of C3 plants von van Bree, Loes G.J, Rijpstra, W. Irene C, Al-Dhabi, N.A, Verschuren, D, Sinninghe Damste, J.S, de Leeuw, J.W

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Characterization of macromolecular organic matter in sediment traps from the northwestern Mediterranean Sea von Peulvé, S., Leeuw, J.W. de, Sicre, M.-A., Baas, M., Saliot, A.

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Origin and palaeoenvironmental significance of C25 and C27n-alk-1-enes in a 25,000-year lake-sedimentary record from equatorial East Africa von van Bree, L.G.J., Rijpstra, W.I.C., Cocquyt, C., Al-Dhabi, N.A., Verschuren, D., Sinninghe Damsté, J.S., de Leeuw, J.W.

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