The chemical nature of nitrogen in native soil organic matter

by Knicker, Heike, Fründ, R., Lüdemann, H.-D.
Published 1993

Characterization of nitrogen in plant composts and native humic material by natural-abundance 15N CPMAS and solution NMR spectra

by Knicker, Heike, Fründ, R., Lüdemann, H.-D.
Published 1997

Solid-state spectroscopic analysis of lignins from several Austral hardwoods

by Martínez, Ángel T., Almendros Martín, Gonzalo, González-Vila, Francisco Javier, Fründ, R.
Published 1999

Solid-state spectroscopic analysis of lignins from several Austral hardwoods

by Martínez, Ángel T., Almendros Martín, Gonzalo, González-Vila, Francisco Javier, Fründ, R.
Published 1999

Structural alteration of lignin after solid state fermentation of wheat straw by lignocellulose degrading fungi

by Almendros Martín, Gonzalo, Martínez, Ángel T., Fründ, R., González-Vila, Francisco Javier
Published 1988

Comparison of the solid state CPMAS and solution carbon-13-NMR spectra of humic acids extracted from composted municipal refuse

by Fründ, R., González-Vila, Francisco Javier, Lüdemann, H.-D., Martín Martínez, Francisco
Published 1987

Spectroscopic characteristics of derivatized humic acids from peat in relation to soil properties and plant growth

by Almendros Martín, Gonzalo, Fründ, R., Martín Martínez, Francisco, González-Vila, Francisco Javier
Published 1994

Structural characteristics and geochemical significance of humic acids isolated from three Spanish lignite deposits

by González-Vila, Francisco Javier, Martín Martínez, Francisco, Río Andrade, José Carlos del, Fründ, R.
Published 1992

P-hydroxyphenyl:guaiacyl:syringyl ratio of lignin in some austral hardwoods estimated by CuO-oxidation and solid-state NMR

by Martínez, Ángel T., González Becerra, Aldo E., Prieto, Alicia, González-Vila, Francisco Javier, Fründ, R.
Published 1991

Characterisation of nitrogen in compost by N-15-NMR

by Knicker, Heike, Fründ, R., Almendros Martín, Gonzalo, González-Vila, Francisco Javier, Martín Martínez, Francisco
Published 1991

NMR and ESR investigation of the humification processes in defined vegetable starting materials

by Almendros Martín, Gonzalo, Fründ, R., González-Vila, Francisco Javier, Lüdemann, H.-D., Martín Martínez, Francisco
Published 1987

NMR and ESR investigation of the humification processes in defined vegetable starting materials

by Almendros Martín, Gonzalo, Fründ, R., González-Vila, Francisco Javier, Lüdemann, H.-D., Martín Martínez, Francisco
Published 1987

Solid state NMR studies of fire-induced changes in the structure of humic substances

by Almendros Martín, Gonzalo, González-Vila, Francisco Javier, Martín Martínez, Francisco, Fründ, R., Lüdemann, H.-D.
Published 1992

Analysis of quantitative C 13 and N 15 CPMAS NMR spectra of soil organic matter and composts

by Fründ, R., Haider, K. M., Almendros Martín, Gonzalo, González-Vila, Francisco Javier, Lüdemann, H.-D.
Published 1989

Analysis of 13C and 15N CPMAS NMR-spectra of soil organic matter and composts

by Almendros Martín, Gonzalo, Fründ, R., González-Vila, Francisco Javier, Haider, K. M., Knicker, Heike, Lüdemann, H.-D.
Published 1991-04

CPMAS carbon-13 NMR study of lignin preparations from wheat straw transformed by five lignocellulose-degrading fungi

by Almendros Martín, Gonzalo, Martínez, Ángel T., González Becerra, Aldo E., González-Vila, Francisco Javier, Fründ, R., Lüdemann, H.-D.
Published 1992

Structural differences between humic fractions from different soil types as determined by FT-IR and 13C-NMR studies

by Fründ, R., Lüdemann, H.-D., González-Vila, Francisco Javier, Almendros Martín, Gonzalo, Río Andrade, José Carlos del, Martín Martínez, Francisco
Published 1989

A simple wet chemical extraction procedure to characterize soil organic matter (Som): 3. Results of vegetation, crop litter, and forest litter in comparison to data as revealed wit...

by Beyer, Lothar, Fründ, R., Wachendorf, C., Knicker, Heike, Sorge, C., Köbbermann, C., Schulten, H. R., Lüdemann, H.-D., Blume, Hans P.
Published 1996

Recent advances in the spectroscopic characterization of soil humic substances and their ecological relevance

by Fründ, R., Guggenberger, G., Haider, K. M., Knicker, Heike, Kögel-Knabner, I., Lüdemann, H.-D., Luster, Jörg, Zech, W., Spiteller, M.
Published 1994-01