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Towards the thermodynamic treatment of humic substances in soilsTowards the thermodynamic treatment of humic substances in soils
(Instituto Geológico, Secretaria do Meio Ambiente, São Paulo, 2005)
Pb(II) binding to humic substances: an equilibrium and spectroscopic study
(American Chemical Society, 2013-06-27)
The binding of Pb(II) to humic acids is studied through an approach combining equilibrium and spectroscopic measurements. The methods employed are potentiometric and fluorometric titrations, fluorescence excitation−emission ...
Humic-like substances from urban waste as auxiliaries for photo-Fenton treatment: a fluorescence EEM-PARAFAC study
(Royal Society of Chemistry, 2016-09-13)
In this work, analysis of excitation-emission-matrices (EEM) has been employed to gain further insight into the characterization of humic like substances (HLS) obtained from urban wastes (soluble bio-organic substances, ...
Hypothetical framework integrating the main mechanisms involved in the promoting action of rhizospheric humic substances on plant root- and shoot- growth
(Elsevier Science, 2017-02)
The ability of rhizospheric humic substances to improve plant growth has been well established by many studies carried out using diverse plant species cultivated under many different conditions. These beneficial effects ...
Root ABA and H+-ATPase are key players in the root and shoot growth-promoting action of humic acids
(John Wiley & Sons Inc, 2019-10)
Although the ability of humic (HA) and fulvic acids (FA) to improve plant growth has been demonstrated, knowledge about the mechanisms responsible for the direct effects of HA and FA on the promotion of plant growth is ...
Particulate organic matter, carbohydrate, humic acid contents in soil macro- and microaggregates as affected by cultivation
(Elsevier Science, 2006-12)
Cultivation is known to strongly affect not only soil structure but also organic substances responsible for aggregation. This research was conducted to study the effect of cultivation on the distribution of soil macro- and ...
Effects of pH and electrolyte concentration on the binding between a humic acid and an oxazine dye
(Pergamon-Elsevier Science Ltd, 2006-04)
The binding between an oxazine dye and a humic acid was studied in aqueous solutions in the pH range 4-10 and in the supporting electrolyte (KCl) range 0.001-0.1 M. A rather simple spectrophotometric method was developed ...
Application of a constrained regularization method to extraction of affinity distributions: Proton and metal binding to humic substances
(Academic Press Inc Elsevier Science, 2009-08)
The binding of proton and metal cations to humic substances has been analyzed with a regularized fitting procedure (using the CONTIN software package) to extract conditional affinity distributions, valid at a given ionic ...
The singular molecular conformation of humic acids in solution influences their ability to enhance root hydraulic conductivity and plant growth
(Molecular Diversity Preservation International, 2020-12)
Some studies have reported that the capacity of humic substances to improve plant growth is dependent on their ability to increase root hydraulic conductivity. It was proposed that this effect is directly related to the ...
Determination of the molar mass of the humic substances of the Chubut River (Argentina) by electrospray ionization mass spectrometry
(Elsevier Science, 2013-09)
Here, we studied the number-average molar mass of the humic substances of the Chubut River (Argentina) in order to progress in their characterization. We used electrospray ionization mass spectrometry in positive mode ...