Results 301 to 310 of about 5,243,021 (356)

Effect of humic acid source on humic acid adsorption onto titanium dioxide nanoparticles

Science of The Total Environment, 2014
In many studies, different humic acid (HA) sources are used interchangeably to evaluate the effect of organic matter on geochemical processes in the environment. This research looks more specifically at the effect of HA source on HA adsorption onto nano-TiO2 and how HA adsorption affects the fate and transport of nano-TiO2.
Mohamed, Erhayem, Mary, Sohn
openaire   +2 more sources

Chemiluminescence of Humic Acids

Nature, 1967
THE concept that humic acids (HA) are heteropolycondensates of phenolic substances is now widely accepted1,2. All the humic acids have hydroxyl, methoxy, or carbonyl groups connected with the aromatic parts of the nucleus. Our earlier investigations suggested that oxidation of hydroxyl groups attached to the aromatic ring may be accompanied by ...
DANUTA SŁAWIŃSKA, JANUSZ SŁAWIŃSKI
openaire   +1 more source

Arsenic humic acid reactions

UNISWA Research Journal of Agriculture, Science and Technology, 2007
No Abstract. Uniswa Research Journal of Agriculture, Science and Technology Vol. 9 (1) 2006: pp.
Thwala, J, Inam, E, Hall, A, Warwick, P
openaire   +2 more sources

Efficacy of Humic Acids and Chitosan for Enhancing Yield and Sugar Quality of Sugar Beet Under Moderate and Severe Drought

Journal of soil science and plant nutrition, 2022
B. Makhlouf, S. Khalil, H. Saudy
semanticscholar   +1 more source

Humic acid reactions with amino acids

Soil Biology and Biochemistry, 1974
Abstract Reactions between five humic acids extracted from soils with widely differing pedological histories and 17 amino acids commonly occurring in proteins were investigated in aqueous solutions at pH 3.0 and 6.5. The reactions were affected by: (a) nature of the humic acid: (b) pH of the system: and (c) length of contact.
M. Schnitzer, F.J. Sowden, K.C. Ivarson
openaire   +1 more source

Acylation of humic acids

Solid Fuel Chemistry, 2015
A method for the chemical modification of humic acids with benzoyl chloride under the conditions of phase-transfer catalysis was developed. It was demonstrated by potentiometric titration that the reaction of humic acids with benzoyl chloride can occur at both hydroxyl (–OH) and carboxyl (–COOH) groups.
S. L. Khil’ko, R. G. Semenova, I. V. Efimova, O. V. Smirnova, V. S. Berezhnoi, V. I. Rybachenko   +5 more
openaire   +1 more source

Natural Humic‐Acid‐Based Phototheranostic Agent

Advanced Healthcare Materials, 2018
AbstractHumic acids, a major constituent of natural organic carbon resources, are naturally formed through the microbial biodegradation of animal and plant residues. Due to numerous physiologically active groups (phenol, carboxyl, and quinone), the biomedical applications of humic acid have been already investigated across different cultures for ...
Zhao‐Hua Miao, Kai Li, Pei‐Ying Liu, Zhenglin Li, Huanjie Yang, Qingliang Zhao, Manli Chang, Qingzhu Yang, Liang Zhen, Cheng‐Yan Xu   +9 more
openaire   +2 more sources

The biofilm matrix: multitasking in a shared space

Nature Reviews Microbiology, 2022
Hans-Curt Flemming, Eric D Van Hullebusch, Thomas R Neu   +2 more
exaly  

Insight into the interaction mechanism of iron ions with soil humic acids. The effect of the pH and chemical properties of humic acids.

Journal of Environmental Management, 2019
P. Boguta, V. D'Orazio, N. Senesi, Z. Sokołowska, Katarzyna Szewczuk-Karpisz   +4 more
semanticscholar   +1 more source

Humic acids: Structural properties and multiple functionalities for novel technological developments.

Materials Science and Engineering C: Materials for Biological Applications, 2016
Bruna Alice Gomes de Melo, F. Motta, M. H. Santana   +2 more
semanticscholar   +1 more source