Results 11 to 20 of about 493,503 (195)

Humic Substances as a Versatile Intermediary [PDF]

open access: yesLife, 2023
Humic substances are organic ubiquitous components arising in the process of chemical and microbiological oxidation, generally called humification, the second largest process of the carbon cycle. The beneficial properties of these various substances can be observed in many fields of life and health, whether it is the impact on the human organism, as ...
Ivona Kozárová   +2 more
exaly   +5 more sources

Pharmacological Effects of Humic Substances and Their Signaling Mechanisms [PDF]

open access: yesMolecules
This comprehensive review presents the results of an in-depth analytical literature search on the biological activity of humic substances and their possible pharmacological mechanisms of action.
Maria V. Zykova   +10 more
doaj   +2 more sources

Al(III) and Fe(III) binding by humic substances in freshwaters, and implications for trace metal speciation. [PDF]

open access: yes, 2002
Published experimental data for Al(III) and Fe(III) binding by fulvic and humic acids can be explained approximately by the Humic Ion-Binding Model VI. The model is based on conventional equilibrium reactions involving protons, metal aquo ions and their ...
Tipping, Edward   +3 more
core   +4 more sources

The effect of pH, dissolved humic substances, and ionic composition on the transfer of iron and phosphate to particulate size fractions in epilimnetic lake water. [PDF]

open access: yes, 1994
Transformations of dissolved iron and phosphate to particulate material (>0.2 \mu m) were investigated by adding ^55 FeCl_3, and ^32 PO_4^3- to pH adjusted epilimnetic lake water samples of contrasting ionic strengths and dissolved humic substances ...
Peter J. Shaw, Shaw, Peter J.
core   +5 more sources

Extraction yield of humic substances from organic materials

open access: yesDyna, 2022
At present there is a great advance in the use of organic substances as fertilizers; humic substances are one of them with various forms of extraction.
Irina Pedroso-Rodriguez   +5 more
doaj   +1 more source

Sonocatalytic Degradation of Humic Substances From Aquatic Environments Using MgO Nanoparticles [PDF]

open access: yesAvicenna Journal of Environmental Health Engineering, 2017
Humic substances are considered as one of the major natural organic contaminants in water resources. Presence of such substances in the drinking water supply resources results in poor water quality and jeopardizes the consumer’s health.
Reza Darvishi Cheshmeh Soltani   +5 more
doaj   +1 more source

Laboratory measurements and modeling of metal-humic interactions under estuarine conditions. [PDF]

open access: yes, 2002
Equilibrium dialysis was used to measure Co- and Cu-binding by an isolated peat humic acid (PHA) in controlled laboratory experiments under simulated estuarine conditions: ionic strengths of 0.005-0.7 M in NaCl and mixed Na-Mg-Ca chloride solutions, with
Hamilton-Taylor, J.   +3 more
core   +4 more sources

Assessing the potential of biochar aged by humic substances to enhance plant growth and soil biological activity

open access: yesChemical and Biological Technologies in Agriculture, 2021
Background Soil carbon-rich organic amendments (biochar, humic substances) may improve the quality and fertility of arable soil. Their co-application can additively enhance the beneficial effect on soil.
Tereza Hammerschmiedt   +13 more
doaj   +1 more source

Evaluation of Humic Fertilizers on Kentucky Bluegrass Subjected to Simulated Traffic

open access: yesAgronomy, 2021
Sports field traffic tolerance is critical for offering athletes a safe playing surface and adequate turfgrass performance. Humic substances act as bio-stimulants that could enhance turfgrass traffic tolerance by increasing turfgrass efficiency, which ...
Alex J. Lindsey   +2 more
doaj   +1 more source

The Effect of Supramolecular Humic Acids on the Diffusivity of Metal Ions in Agarose Hydrogel

open access: yesMolecules, 2022
Humic acids are known as natural substances of a supramolecular nature. Their self-assembly ability can affect the migration of heavy metals and other pollutants in nature.
Martina Klučáková
doaj   +1 more source

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