Results 41 to 50 of about 944,278 (220)
Binding of metals to macromolecular organic acids in natural waters [PDF]
, 2008 Trace metal speciation and bioavailability have become keys to current day toxicity and risk assessments. For many metals, macromolecular organic acids constitute the major ligand in fresh water and soil solution.
van Schaik, Joris W. J.
core +1 more source
The Scientific World Journal, 2001 We are studying the chemical quality of dissolved organic nitrogen (DON) in a high-elevation watershed in the Colorado Front Range. Samples were collected over the 2000 snowmelt runoff season at two sites across an alpine/subalpine ecotone to understand ...
Eran W. Hood, Mark W. Williams
doaj +1 more source
Humic substances and rhizobacteria enhance the yield, physiology and quality of strawberries
Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 2022 The strawberry fruit (Fragaria × ananassa Duch.) is appreciated for its aroma, color, texture and nutritional value. In conventional agriculture, the use of fertilizers damages the environment since it causes loss of soil fertility, salinity and its ...
Simeón MARTÍNEZ-DE LA CRUZ +6 more
doaj +1 more source
Polish Polar Research, 2020 Humic substances are polydisperse mixtures of structurally complex matters with different molecular weights. The complexity of molecular composition of humic substances is reflected through their physical and chemical properties and results in diverse ...
Lodygin, Evgeny, Vasilevich, Roman
doaj +1 more source
Рослинництво та ґрунтознавство, 2023 The soil-forming process is closely related to the accumulation and circulation of organic substances, which are a source of nutrients for plants released during the mineralisation of humus, so research on determining the qualitative composition of humus
M. Voitovyk +3 more
doaj +1 more source
Chemical and Biological Technologies in Agriculture, 2021 Background Humic substances can be considered as polyelectrolytes with supramolecular character and complicated behaviour in water environment. The fractions of humic substances dissolved in water are the most active ones and determinative for their ...
Martina Klučáková
doaj +1 more source
Emulsifying Effect of Fulvic Acids from Shilajit
Chemistry Proceedings, 2022 Shilajit, also known in the north of India as salajit, shilajatu, mimie, or mummiyo, is a blackish-brown powder or an exudate from high mountain rocks, especially in the Himalayans mountains between India and Nepal [...]
Denisa-Ioana Gheorghe +3 more
doaj +1 more source
, 1996 Poster presentado en el 18th International Meeting on Organic Geochemistry. Part I.
openaire +1 more source
The persulfate oxidation of fulvic acids [PDF]
Zeitschrift für Pflanzenernährung und Bodenkunde, 1983 AbstractPersulfate oxidation of two fulvic acids from different soils was accomplished. This is a new mild chemical degradative method which differentiates between fulvic acids isolated from soils developed under widely differing environments. A fulvic acid isolated from an Humic Haplorthod gives as major oxidation products phenolic acids, whereas a ...
Martín Martínez, Francisco +1 more
openaire +2 more sources
Geological Journal, EarlyView.Chemical states of Se and Br atoms in the KPg boundary sediments from Stevns Klint were studied using XAFS spectroscopy. The high concentrations of Se4+ could become an index of the degree to which the global environment was soiled with dust and ash derived from impact ejecta or volcanic eruptions.
Kei‐ichiro Murai +5 more
wiley +1 more source