Results 61 to 70 of about 844,530 (247)

Molecular size distribution and hydrophilic and hydrophobic properties of humic acids isolated from forest soil

open access: yesSoil and Water Research, 2007
The aim of the present paper was to determine hydrophilic and hydrophobic properties and the degree of polydispersity of humic acids depending on their degree of maturity and the properties of the plant material participating in the process of ...
Bozena Debska   +2 more
doaj   +1 more source

Single–Atom Iron Sites Enable Enhanced Arsenic Removal From Water Through Synergistic Adsorption–Oxidation

open access: yesAdvanced Science, EarlyView.
Single–atom iron anchored on nitrogen–doped porous biochar exhibited ultra–efficient performance, exceptional environmental resilience, and integrated adsorption–oxidation functionality. The multifunctional architecture of the support and the unparalleled reactivity of single–atom iron underpinned the cooperative adsorption and oxidation of As(III ...
Tao Sun   +8 more
wiley   +1 more source

Aumento del contenido de ácidos húmicos en un carbón de bajo rango a través de la oxidación con aire y con peróxido de hidrogeno o ácido nítrico

open access: yesQuímica Nova, 2013
Low-rank coals are an important source of humic acids, which are important in retention processes of water and nutrients in plants. In this study coal samples of Montelibano, Colombia, were oxidized with air at different temperatures and subsequently ...
Ruben Anillo-Correa   +2 more
doaj   +1 more source

Immobilization and mineralization of nitrogen in pasture soil [PDF]

open access: yes, 1972
The results obtained from turf samples indicate that growing plants are mainly responsible for the accumulation of soil organic nitrogenous compounds.
Huntjens, J.L.M.
core  

Sunscreen‐Inspired Nano‐Pesticide for UV‐Shielding and Laccase‐Responsive Delivery of Mancozeb With Enhanced Fungicidal Efficacy and Ecological Safety

open access: yesAdvanced Science, EarlyView.
The sunscreen‐inspired nano‐pesticide, MCB@URFSL, provides UV‐shielding, enhanced rainfastness, and laccase‐responsive delivery for improved fungicidal efficacy and high ecological safety. ABSTRACT Fungicides are a crucial tool for protecting crops and ensuring consistent food supply.
Jin Yan   +10 more
wiley   +1 more source

Heavy metal distribution between fractions of humic substances in heavily polluted soils

open access: yesPlant, Soil and Environment, 2004
Soil organic matter is important in controlling heavy metal behaviour in soils. This study aims to determine the distribution of organically bound Cd, Pb, and Zn between humic and fulvic acids in 20 samples of heavily polluted Fluvisols.
L. Borůvka, O. Drábek
doaj   +1 more source

Impact of humic acids on methane emissions from microplastic contaminated paddy soils

open access: yes, 2023
reservedPolyvinyl chloride (PVC) microplastics (MP) have been shown to increase methane emissions from paddy soils. Redox-active humic acids (HA) were also found to be enriched in microplastic contaminated soils, and these compounds have the potential to
RIZZETTO, NICHOLAS
core  

Nutritional requirements for the production of dithiolopyrrolone antibiotics by Saccharothrix algeriensis NRRL B-24137 [PDF]

open access: yes, 2006
The amino acid and humic acid requirements of Saccharothrix algeriensis NRRL B-24137 for growth and production of the dithiolopyrrolone antibiotics were studied in a semi-synthetic medium (SSM).
Sabaou, Nasserdine   +3 more
core   +1 more source

A Photothermally Amplified Enzyme–Nitric Oxide Co‐Regulatory System Reprograms Pathological ECM–Fibroblast Crosstalk to Alleviate Hypertrophic Scarring

open access: yesAdvanced Science, EarlyView.
An enzyme–nitric oxide (NO) co‐regulatory strategy reprograms pathological extracellular matrix (ECM)–fibroblast crosstalk in hypertrophic scars. Enzymatic degradation of pre‐existing ECM relieves aberrant mechanical cues, while NO‐mediated fibroblast phenotypic modulation restrains excessive collagen synthesis.
Junzhe Fu   +7 more
wiley   +1 more source

Sorption of Neodymium from Nitrate Solutions by Humic Acids-Based Sorbent

open access: yesEurasian Chemico-Technological Journal, 2022
 This work obtained a sorbent based on humic acids (HA) isolated from oxidized brown coals of the Maikuben deposit. The study of humic acids by IR spectroscopy showed the presence of various functional groups (OH-, COOH-) in the sorbent, which can enter
A.G. Ismailova   +6 more
doaj   +1 more source

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