Results 21 to 30 of about 5,143,384 (251)

Characterization of coal-based fulvic acid and the construction of a fulvic acid molecular model

RSC Advances, 2020
Fulvic acid (FA) is composed of many molecular units with similar characteristic structures. The characterization and molecular model construction of coal-based FA is the key for the scientific basis and applied science of FA.
Guan-qun Gong, Xin Yuan, Ying-jie Zhang, Ya-jun Li, Wei-xin Liu, Ming Wang, Yu-feng Zhao, Liang-wei Xu   +7 more
openaire   +3 more sources

Effects of Methane Fermentation on Spectral Properties of Fulvic Acid Extracted from Peat through Liquid Acid Precipitation

Journal of Chemistry, 2020
The effects of acid precipitation with different liquid acids on spectral properties of fulvic acid extracted from peat was studied to select the most appropriate liquid acid for the acid precipitation step of the alkali solution acid precipitation ...
Li-Tong Ma, Ya-Nan Lu, Ya-Xiong Wang
doaj   +1 more source

Biomineralization of primary carbonate cements: a new biosignature in the fossil record from the Anisian of Southern Italy

Lethaia, EarlyView., 2021
Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido, Matteo Sposato, Giuseppe Palladino, Alessandro Vescogni, Domenico Miriello   +4 more
wiley   +1 more source

Etude sur les acides fulviques extraits d'eaux superficielles françaises - Extraction, caractérisation et réactivité avec le chlore [PDF]

, 1990
Après avoir présenté quelques données bibliographiques sur les substances humiques aquatiques, l'extraction de plusieurs substances humiques issues de onze eaux de surface françaises, est discutée en terme de rendements d'extraction.
Croue, J. P., Doré, M., Legube, B., Xiong, F.   +3 more
core   +1 more source

Biostimulants derived from organic urban wastes and biomasses: An innovative approach

Frontiers in Chemistry, 2023
We used humic and fulvic acids extracted from digestate to formulate nanohybrids with potential applications in agronomy. In order to obtain a synergic co-release of plant-beneficial agents, we functionalized with humic substances two inorganic matrixes:
Alessia Giordana, Mery Malandrino, Alfonso Zambon, Gigliola Lusvardi, Lorenza Operti, Giuseppina Cerrato   +5 more
doaj   +1 more source

Use of biologically active substances in hops

Plant, Soil and Environment, 2018
In four-year experiments, hop was treated with 7 biologically active substances in two terms during vegetation: Lignohumate max (a mixture of humic acids and fulvic acids), Lexin (a mixture of humic acids and fulvic acids enriched with auxins), Lexenzym (
Pavel PROCHÁZKA, Přemysl ŠTRANC, Kateřina PAZDERŮ, Jan VOSTŘEL, Jan ŘEHOŘ   +4 more
doaj   +1 more source

Controls on the composition and lability of dissolved organic matter in Siberia's Kolyma River basin [PDF]

, 2012
High-latitude northern rivers export globally significant quantities of dissolved organic carbon (DOC) to the Arctic Ocean. Climate change, and its associated impacts on hydrology and potential mobilization of ancient organic matter from permafrost, is ...
A. Davydova, Alling, Amon, Aufdenkampe, Balcarczyk, Benner, Bertilsson, Boyer, Bro, Brown, Bélanger, Cauwet, Coble, Coble, Coble, Cory, Cory, Cory, Dittmar, E. Bulygina, Fellman, Fellman, Fellman, Finlay, Frey, Geller, Gibson, Gordeev, Guo, Hansell, Helms, Hernes, Hernes, Holmes, Holmes, Hood, Hornberger, Inamdar, Kieber, Kimble, Lafrenière, Laudon, Letscher, Lindsay, Lobbes, McGlynn, McGuire, McKnight, McKnight, Miller, Mopper, Murphy, N. Zimov, Neff, O'Donnell, Opsahl, Opsahl, Opsahl, Osburn, P. J. Mann, Peterson, R. G. M. Spencer, R. M. Holmes, Raymond, S. Davydov, S. Zimov, Sierra, Spencer, Spencer, Spencer, Spencer, Stedmon, Stedmon, Stedmon, Stedmon, Stone, Striegl, Striegl, Stubbins, Tarnocai, Tranvik, Walker, Weishaar, Wu, Zimov   +84 more
core   +1 more source

Behaviours of natural organic matter in membrane filtration for surface water treatment : a review [PDF]

, 2006
Membrane application in surface water treatment provides many advantages over conventional treatment. However, this effort is hampered by the fouling issue, which restricts its widespread application due to increases in hydraulic resistances, operational
Ismail, A. F., Salim, Razman, Zularisam, A. W.   +2 more
core   +1 more source

Sonochemical Degradation of Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoate (PFOA) in Landfill Groundwater: Environmental Matrix Effects [PDF]

, 2008
Perfluorinated chemicals such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are environmentally persistent and recalcitrant to most conventional chemical and microbial treatment technologies.
Cheng, Jie, Hoffmann, Michael R., Mader, Brian T., Park, Hyunwoong, Vecitis, Chad D.   +4 more
core   +3 more sources

Influence of humus acids on mobility and biological availability of iron, zinc and copper

Agricultural Science and Practice, 2015
Soil organic matter is known as an important condition for the mobility of trace elements in soils, their geo- chemical migration and availability to plants.
A. Fateev, D. Semenov, K. Smirnova, A. Shemet   +3 more
doaj   +1 more source