Results 171 to 180 of about 944,278 (220)

Effects of fulvic acids on goat sperm

Zygote, 2018
SummaryThe effects of adding fulvic acids (FAs) to semen extenders on the quality parameters of frozen–thawed goat buck spermatozoa remain undetermined. Buck semen samples collected from six mature goat bucks once a week were diluted with Tris–egg yolk-based extenders.
Yu, Xiao, Zhengmu, Wu, Min, Wang
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Binding of cadmium to Laurentide fulvic acid. Justification of the functionalities assigned to the predominant acidic moieties in the fulvic acid molecule

Talanta, 1995
The binding of cadmium to a fulvic acid (FA) extracted from peat was studied as a function of pH (4-8), ionic strength (0.01 and 0.10 M NaNo(3)) and ratio of fulvic acid to metal ion concentrations (FA Cd = 8, 4 , and 2). An overall complex formation function of approximately 10(3.14) was determined to enable comparison with previous studies ...
A S, Mathuthu, J H, Ephraim
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Kinetics of aluminum-fulvic acid complexation in acidic waters

Environmental Science & Technology, 1987
A fluorescence technique has been used to study the complex formation kinetics of aluminum with a single metal-free fulvic acid isolated from an Adirondack Mountain forest soil. In the pH range of 3.0-4.5, two kinetically distinguishable components of the fulvic acid mixture have been identified, which define two types of average aluminum binding sites.
B J, Plankey, H H, Patterson
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Adsorption of fulvic acid on goethite

Geochimica et Cosmochimica Acta, 2000
The adsorption of fulvic acid by goethite was determined experimentally as a function of concentration, pH, and ionic strength. The data were described with the CD-MUSIC model of Hiemstra and Van Riemsdijk (1996), which allows the distribution of charge of the bound fulvate molecule over a surface region. Simultaneously, the concentration, pH, and salt
Filius, J.D., Lumsdon, D.G., Meeussen, J.C.L., Hiemstra, T., van Riemsdijk, W.H.   +4 more
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Physico-Chemical Properties of Fulvic Acids

2003
By mean of extraction and ion exchange fulvic acids with variable vestigial content of metals were separated from bottom sediments. These acids were subject to physico-chemical analysis, which evaluated their electrokinetic potential, size of molecules, absorbance, electrical conductivity of the solution as well as the relation of these factors to the ...
Anna M. Anielak, Majewski, Artur
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Fulvic acid in broiler growing

Животноводство России, 2021
Эксперимент показал, что при выращивании бройлеров эффективно добавлять в питьевую воду фульвокислоту в дозе 2% (концентрация 1 г/л). Это позволило увеличить убойный выход потрошеной тушки, массовую долю грудки и бедра, выход мышц и съедобных частей.
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The dissolution of micas by fulvic acid

Geoderma, 1976
Abstract Three micas commonly occurring in soils, that is, biotite, phlogopite and muscovite, were shaken with 0.2% (W/V) aqueous fulvic acid (FA) solution for 710 h at room temperature. Proportions of major constituent elements extracted (Fe, Al, Mg, K and Si from biotite, Al, Mg, K and Si from phlogopite and Al, K and Si from muscovite) were ...
M Schnitzer, H Kodama
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Chemical Characteristics of Fulvic Acids

Journal AWWA, 1963
In the first article of this series on the nature of organic compounds that cause color in natural waters (BLACK, A. P. & CHRISTMAN, R. F. Characteristics of Colored Surface Waters. Jour. AWWA, 55 :753 [Jun. 1963]), data was presented concerning the physical and chemical properties of colored raw waters. This article discusses experimental evidence
A. P. Black, Russell F. Christman
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Pyrolysis of humic and fulvic acids

Geochimica et Cosmochimica Acta, 1969
Abstract Pyrolysis of humic and fulvic acids isolated from a North Carolina soil yields a variety of aromatic, heterocyclic and straight chain organ compounds. The pyrolysis products identified by gas chromatography and mass spectrometry indicate that humic and fulvic acids have aromatic and polysaccharide structures in their molecules.
R.L. Wershaw, G.E. Bohner
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Europium binding by fulvic acids

Analytica Chimica Acta, 1998
The binding of Eu to fulvic acid (FA) as a function of pH was determined by Schubert's method and by equilibrium dialysis. Data obtained by both methods showed a strong pH dependence, which was reproduced well by the model used to interpret the data (humic ion-binding model VI).
Lead, J. R., Hamilton-Taylor, John, Peters, A., Reiner, S., Tipping, E.   +4 more
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