Results 41 to 50 of about 23,723 (227)
Chirality and the origin of atmospheric humic-like substances [PDF]
, 2010 Aerosol water extracts and atmospheric humic-like substances (HULIS) obtained from PM2.5-fraction aerosol samples collected in a rural/continental background environment and in an urban environment in spring and summer, and at a tropical site that was ...
Maenhaut, Willy +4 more
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From mass to structure: An aromaticity index for high-resolution mass data of natural organic matter [PDF]
, 2006 Recent progress in Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS) provided extensive molecular mass data for complex natural organic matter (NOM). Structural information can be deduced solely from the molecular masses for ions with
Benecke +16 more
core +1 more source
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 +3 more
doaj +1 more source
The effects of fulvic acid application on seed and oil yield of safflower cultivars [PDF]
Journal of Central European Agriculture, 2017 This study was carried out as split split plots in a randomized complete block design with three replications at Research Field of Agriculture Faculty, during 2014-2015 in Iran.
Payman MORADI +2 more
doaj +1 more source
SYNTHETIC FULVIC ACIDS FROM TANNIN
Vìsnik Dnìpropetrovsʹkogo unìversitetu. Serìâ Hìmìâ, 2021 Исследование представляет новый, простой и эффективный метод получения синтетических фульвокислот из танина. Синтез основан на реакции окисления танина чистым кислородом в сильно щелочной среде. Комплексное исследование физико-химических и спектроскопических свойств полученного продукта с использованием методов элементного анализа, спектроскопии в УФ ...
Litvin, Valentina A., Abi Njoh, Roger
openaire +1 more source
Agronomy, 2022 Iron deficiency, which severely decreases the plant yield and quality, is one of the major problems of calcareous soils. Foliar applications of humic substances and/or Fe fertilizers are environmentally friendly methods to cope with Fe deficiency.
Metin Turan +7 more
doaj +1 more source
Variations in radiocarbon ages of various organic fractions in core sediments from Erhai Lake, SW China [PDF]
, 2003 Radiocarbon dating was performed for the extracted organic fractions (cellulose-rich and humic acid fractions of plant fragment; fulvic acid, humic acid and humin fractions of humus substance) and shell from core sediments of the Erhai Lake, SW China ...
Xu, S., Zheng, G.
core +1 more source
Effects of of fulvic acid and cow manure on stigma active components and petal Antiradical Activity of saffron (Crocus sativus L.) [PDF]
Zirā̒at va Fanāvarī-i Za̒farān, 2018 components of saffron were evaluated under field conditions. Treatments were four levels cow manure (0, 10, 20 and 30 t.ha-1) and three fulvic acid (0, 5 and 10 kg.ha-1).
Mohammad Hossein Aminifard +1 more
doaj +1 more source
, 1996 Poster presentado en el 18th International Meeting on Organic Geochemistry. Part I.
openaire +1 more source
Eu(III)–Fulvic Acid Complexation: Evidence of Fulvic Acid Concentration Dependent Interactions by Time-Resolved Luminescence Spectroscopy [PDF]
Environmental Science & Technology, 2016 Europium speciation is investigated by time-resolved luminescence spectroscopy (TRLS) in the presence of Suwannee River fulvic acid (SRFA). From complexation isotherms built at different total Eu(III) concentrations, pH values, ionic strength, and SRFA concentrations, it appears that two luminescence behaviors of Eu(III) are occurring.
Kouhail, Yasmine +2 more
openaire +3 more sources