Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Humic substances formation

PATHWAYS OF HUMIC SUBSTANCE FORMATION 2.4.1. Selective Preservation Pathways of Humification... [Pg.58]

Figure 8.10 Humic substance formation depicted by the early biopolymer degradation and abiotic condensation models. (Modified from Hedges, 1988.)... Figure 8.10 Humic substance formation depicted by the early biopolymer degradation and abiotic condensation models. (Modified from Hedges, 1988.)...
It has been shown by tracer techniques that, when labeled glucose, hemi-cellulose, or cellulose is allow ed to decompose in the soil, the activity is rapidly distributed in all soil organic fractions examined. If the experiments were to be repeated on better defined fractions, the role of carbohydrates in humic-substance formation could be considerably clarified. [Pg.351]

Other possible theories of stream humic substance formation are the browning reactions (the black substances produced by the action of acids on sugars) (Haworth, 1971) and the melanoidin reaction (the dark pigments produced when glucose, alanine or ammonia, and phenolic substances react with one another) (Hoering, 1973 Filip et al., 1974 Ertel and Hedges, 1983). These theories are discussed in detail by Stevenson in Chapter 2 of this book. [Pg.198]

See other pages where Humic substances formation is mentioned: [Pg.126]    [Pg.41]    [Pg.59]    [Pg.59]    [Pg.61]    [Pg.63]    [Pg.65]    [Pg.67]    [Pg.194]    [Pg.168]    [Pg.171]    [Pg.121]    [Pg.99]    [Pg.2109]   
See also in sourсe #XX -- [ Pg.389 ]

See also in sourсe #XX -- [ Pg.9 , Pg.10 , Pg.11 , Pg.12 ]



SEARCH



Enzymes humic substance formation

Humic formation

Humic material/substances formation

Humic substances

Microorganisms humic substance formation

Substance formation

© 2024 chempedia.info