Results 101 to 110 of about 11,607 (259)

A novel model of humin [PDF]

open access: yesAnalusis, 1999
Our poor knowledge of the structure and formation of humic substances stems from the lack of suitable tools which enable the study of the molecular structure of these complex, yellow-brownish materials. Here, several findings using a combination of isotopic, pyrolytic, microscopic and gas chromatographic methods lead to the proposal of a novel model of
openaire   +4 more sources

Flow Rate and Interference Studies for Copper Binding to a Silica-Immobilized Humin Polymer Matrix: Column and Batch Experiments

open access: yesBioinorganic Chemistry and Applications, 2005
Batch and column experiments were performed to determine the Cu(II) binding capacity of silica-immobilized humin biomass. For column studies, 500 bed volumes of a 0.1 mM Cu(II) solution were passed through humin packed columns at the flow rates of 1, 1.5,
Jorge L. Gardea-Torresdey   +3 more
doaj   +1 more source

Soil organic matter as a function of nitrogen fertilization in crop successions Matéria orgânica do solo em função de adubação nitrogenada em sucessões de culturas

open access: yesScientia Agricola, 2005
The interdependence between the C and N cycles is reflected by the levels of soil organic matter (SOM). SOM and organic C levels in water soluble (C-WS) humic acids (C-HA), fulvic acids (C-FA), and humin fractions (C-H) were evaluated through the classic
Renato Yagi   +4 more
doaj   +1 more source

Use of Palm Oil Mill Effluent (Pome) and Peat to Reduce Ammonia Volatilisation from Fertiliser Urea [PDF]

open access: yes, 1997
Ammonia (NH3) volatilization is a major pathway of nitrogen loss which limits the efficiency of urea as a fertilizer when surface-applied to soils. High pH and low cation exchange capacity in soils have been identified as the principal causes ofNH3 ...
Balasundram, Siva Kumar
core  

Transfer Hydrogenation with Waste‐Derived Aqueous Solutions of Formic Acid Catalysed by the SulfoShvo Catalyst

open access: yesChemSusChem, Volume 18, Issue 24, December 13, 2025.
Transfer hydrogenation of carbonyl and olefinic compounds with the buffer‐free combination of waste‐derived, aqueous formic acid solution and the sulfoShvo catalyst at pH = 1 and elevated temperatures in pressure autoclaves. The OxFA process provides aqueous formic acid (FA) solutions of around 53 wt% directly from biomass‐derived byproducts such as ...
Justus Diekamp   +3 more
wiley   +1 more source

Use of high-dimensional spectral data to evaluate organic matter, reflectance relationships in soils [PDF]

open access: yes
Recent breakthroughs in remote sensing technology have led to the development of a spaceborne high spectral resolution imaging sensor, HIRIS, to be launched in the mid-1990s for observation of earth surface features. The effects of organic carbon content
Baumgardner, M. F.   +4 more
core   +1 more source

Laser-induced fluorescence of organic matter from a Brazilian oxisol under sewage sludge applications. [PDF]

open access: yes, 2015
A aplicação do lodo de esgoto é utilizada como alternativa de conservação e manutenção da fertilidade dos solos sem prejudicar o ecossistema. O objetivo do presente trabalho foi avaliar a influência da aplicação de lodo de esgoto sobre a matéria orgânica
BERTON, R.   +6 more
core  

High contribution of hydrocarbon transformation during the removal of polycyclic aromatic hydrocarbons from soils, humin and clay by thermal treatment at 100–200 °C

open access: yesEnvironmental Chemistry Letters, 2020
Polycyclic aromatic hydrocarbons (PAHs) are major pollutants in air, soils and sediments. PAH-polluted soils can be cleaned rapidly by thermal treatment.
Hanzhong Jia   +4 more
semanticscholar   +1 more source

ВПЛИВ КОМПЛЕКСНИХ МІКРОДОБРИВ НА ОСНОВНІ БІОМЕТРИЧНІ ПАРАМЕТРИ ГІБРИДІВ КУКУРУДЗИ [PDF]

open access: yes, 2014
Кукурудза завжди займала провідне місце у зерновому і кормовому балансах України. Вітчизняний науковий досвід показує, що за потенціалом продуктивності зерна та зеленої маси, кормовою й енергетичною цінністю ця культура фактично не має собі рівних і є ...
Гож, О. А.   +2 more
core  

Organic matter fractions and soil fertility under the influence of liming, vermicompost and cattle manure

open access: yesScientia Agricola, 2003
This work evaluates effects of cattle manure vermicompost in association with liming on soil fertility indexes. The experiment was carried out in greenhouse conditions, in pots containing samples of a Typic Hapludox, medium-textured soil.
Yagi Renato   +3 more
doaj  

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