Results 51 to 60 of about 2,736,925 (213)

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, González-Vila, Francisco Javier   +1 more
openaire   +2 more sources

Local Structures of Se and Br in Cretaceous–Paleogene Boundary Sediments and Concentration Effects of Ferrihydrite Originating From Impact Ejecta

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, Akira Yoshiasa, Ginga Kitahara, Makoto Tokuda, Satoko Ishimaru, Toshihiro Moriga   +5 more
wiley   +1 more source

Perspectives of High‐Resolution Mass Spectrometry in Soil Science

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Soil biogeochemical research requires specific, sensitive, and accurate methods to identify and quantify organic molecules in order to trace biochemical processes and assess element cycling in complex, heterogenous systems. High‐resolution mass spectrometry (HRMS) has evolved into a transformative tool for unraveling the complex chemical ...
Bruno Glaser, Tobias Bromm, Klaus Kaiser, Arthur Gross, Carsten Simon, Snežana Maletić, Ines Mulder, Oliver J. Lechtenfeld, Sören Thiele‐Bruhn, Ivy Notterpek, Callum Banfield, Michaela A. Dippold   +11 more
wiley   +1 more source

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

Antimicrobial potential of the combination of fulvic acid and Trichoderma asperellum against rice pathogens

Biological Control
In this study, fluvic acid was prepared from sludge waste. The prepared fulvic acid had almost the same chemical structure as the standard compound expect that it contained a slightly more functional groups, which increased stability and biological ...
Xinyi Hou, Daizong Cui, Jinming Yang, Zhenghao Fang, Min Zhao   +4 more
doaj   +1 more source

Propriedades ácido-base e de complexação de ácidos húmico e fúlvico isolados de vermicomposto Acid/base and complexation properties of humic and fulvic acids isolated from vermicompost

Química Nova, 2007
Proton binding properties of humic and fulvic acids were studied by potentiometric titration. Carboxylic groups were the predominant ionizable sites in comparison to phenolic and amine groups.
Sandro de Miranda Colombo, Luciana Bagdeve de Oliveira dos Santos, Jorge Cesar Masini, Gilberto Abate   +3 more
doaj   +1 more source

Microbial and Non‐Microbial Biostimulants for Soil Health in Managed Agricultural Systems: A Scientometric Analysis of Bioinputs From 2021 to 2025

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Biostimulants and related bioinputs encompass microbial and non‐microbial strategies used to improve plant performance, nutrient‐use efficiency, stress resilience, and soil functioning. Aim For this study, plant biostimulants were operationally defined as substances or microorganisms applied to enhance nutrient‐use efficiency ...
Enoch de Souza Ferreira, Simone Cristina Freitas de Carvalho, Carla Natanieli de Oliveira Batista, Diego José da Costa Bandeira, Priscila Pascali da Costa Bandeira, Felipe Guimaraes Leitão da Silva, Antonio Carlos da Silva, Allysson Régis Praxedes Moreira, Darliane Cristina Soares de Souza, Eulene Francisco da Silva, Carolina Malala Martins Souza, Rafael Oliveira Batista, Leilson Costa Grangeiro, Luiz Fernando de Sousa Antunes   +13 more
wiley   +1 more source

Fulvic acid modification with phenolic precursors towards controllable solubility performance [PDF]

Fulvic acids possess important properties for soil improvement and take part in processes such as complexation, chelation, buffering, transport of vitamins and minerals, as well as pH effects.
Pandey, A., Marzban, N., Ambrosini, S., Antonietti, M. ; https://orcid.org/, Tkachenko, V., Vogl, S., Filonenko, S. ; https://orcid.org/   +6 more
core   +2 more sources

Intercation Between Some Micro-Elements And Humic Substances in Some Forest Soils Northern Iraq

Tikrit Journal for Agricultural Sciences, 2022
Four pedons were selected for different soils in the forest cover, two in each of Mankeesh and Atrush areas in Dohuk governorate, under pine and oak trees, in order to study the distribution of the main groups of humic compounds (humic and fulvic acids ...
Qahtan D. Essa Al-Khafagi
doaj   +1 more source

Mechanism of Combined Improvement of Saline‐Alkali Soil by Artificial Humic Acid and Microbial Inoculant

Land Degradation &Development, EarlyView.
ABSTRACT To address the widespread constraints imposed by saline‐alkaline soils on agricultural production worldwide, the combined reclamation and carbon cycle regulation effects of artificial humic acid (AHA) and a multifunctional microbial inoculant were evaluated through pot experiments. Results demonstrated that co‐application of AHA (4 g·kg−1) and
Ying Zhao, Rui Zhang, Zeyu Zhang, Fan Yang, Zhuqing Liu   +4 more
wiley   +1 more source