7

Ion exchange chromatography of fulvic acids from lignite

Year:
1987
Language:
english
File:
PDF, 340 KB
english, 1987
29

Fractionation of raw and methylated fulvic acids from lignite by thin-layer chromatography

Year:
1988
Language:
english
File:
PDF, 391 KB
english, 1988
37

‘Bitumen’ from Spanish lignites: nature of their solvent fractions

Year:
1978
Language:
english
File:
PDF, 328 KB
english, 1978
38

Effects of five variables in phosphorus fixation by humic acids from lignite

Year:
1984
Language:
english
File:
PDF, 285 KB
english, 1984