Evaluation of New Organic Phase Extraction Procedures for Studying the Role of Terrestrial Humic Substances in the Speciation of Iron and Plutonium

1990 ◽  
pp. 435-446
Author(s):  
Robert A. Bulman ◽  
Gyula Szabo ◽  
Angela J. Wedgwood
Keyword(s):  
Humic Substances ◽  
Organic Phase ◽  
Phase Extraction ◽  
Extraction Procedures

scholarly journals Role of Lipid-Derived Free Radical in Bleomycin-Induced Lung Injury in Mice: Availability for ESR Spin Trap Method with Organic Phase Extraction

2008 ◽  
Vol 31 (10) ◽  
pp. 1855-1859 ◽  
Author(s):  
Keizo Sato ◽  
Yasumasa Tashiro ◽  
Satsuki Chibana ◽  
Akihisa Yamashita ◽  
Tomohiro Karakawa ◽  
...  
Keyword(s):  
Free Radical ◽  
Lung Injury ◽  
Organic Phase ◽  
Spin Trap ◽  
Phase Extraction

scholarly journals Role of extraction procedures on the concentration of varietal thiol precursors in Grillo white grape must

2021 ◽  
Author(s):  
A. Tirelli ◽  
I. De Noni ◽  
M. Stuknyté ◽  
V. Pica ◽  
D. Fracassetti
Keyword(s):  
Grape Must ◽  
Extraction Procedures

Determination of Diffusion Coefficients of Humic Substances by Fluorescence Correlation Spectroscopy:  Role of Solution Conditions

2000 ◽  
Vol 34 (7) ◽  
pp. 1365-1369 ◽  
Author(s):  
Jamie R. Lead ◽  
Kevin J. Wilkinson ◽  
Konstantin Starchev ◽  
Silvio Canonica ◽  
Jacques Buffle
Keyword(s):  
Humic Substances ◽  
Diffusion Coefficients ◽  
Fluorescence Correlation Spectroscopy ◽  
Correlation Spectroscopy ◽  
Fluorescence Correlation

scholarly journals Phylogenetic and Functional Diversity of Saprolegniales and Fungi Isolated from Temperate Lakes in Northeast Germany

2021 ◽  
Vol 7 (11) ◽  
pp. 968
Author(s):  
Hossein Masigol ◽  
Jason Nicholas Woodhouse ◽  
Pieter van West ◽  
Reza Mostowfizadeh-Ghalamfarsa ◽  
Keilor Rojas-Jimenez ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Enzymatic Activity ◽  
Humic Substances ◽  
Plant Litter ◽  
Freshwater Ecosystems ◽  
Chitinolytic Activity ◽  
Ecological Implications ◽  
Eukaryotic Organisms

The contribution of fungi to the degradation of plant litter and transformation of dissolved organic matter (humic substances, in particular) in freshwater ecosystems has received increasing attention recently. However, the role of Saprolegniales as one of the most common eukaryotic organisms is rarely studied. In this study, we isolated and phylogenetically placed 51 fungal and 62 Saprolegniales strains from 12 German lakes. We studied the cellulo-, lignino-, and chitinolytic activity of the strains using plate assays. Furthermore, we determined the capacity of 10 selected strains to utilize 95 different labile compounds, using Biolog FF MicroPlates™. Finally, the ability of three selected strains to utilize maltose and degrade/produce humic substances was measured. Cladosporium and Penicillium were amongst the most prevalent fungal strains, while Saprolegnia, Achlya, and Leptolegnia were the most frequent Saprolegniales strains. Although the isolated strains assigned to genera were phylogenetically similar, their enzymatic activity and physiological profiling were quite diverse. Our results indicate that Saprolegniales, in contrast to fungi, lack ligninolytic activity and are not involved in the production/transformation of humic substances. We hypothesize that Saprolegniales and fungi might have complementary roles in interacting with dissolved organic matter, which has ecological implications for carbon cycling in freshwater ecosystems.

Solvent extraction studies of the system 64Cu/Htta/topo and the role of the metal complexes involved

1970 ◽  
Vol 23 (12) ◽  
pp. 2413
Author(s):  
EB Jacobs ◽  
WR Walker
Keyword(s):  
Solvent Extraction ◽  
Metal Complexes ◽  
Organic Phase ◽  
Ternary Complex ◽  
Equilibrium Constants ◽  
Synergistic Extraction ◽  
Back Extraction

Solvent extraction studies have been carried out on the system Cu/Htta/topo (Htta = thenoyltrifluoroacetone; topo = tri-n-octylphosphine oxide) with benzene as the organic phase. Using 64Cu as a tracer, equilibrium constants have been evaluated and compared with data obtained from the back-extraction of the labelled ternary complex 64Cu(tta)2(topo). The solubilities of binary and secondary complexes that are involved in synergistic extraction have also been measured.

scholarly journals First Quantification of the Controlling Role of Humic Substances in the Transport of Iron Across the Surface of the Arctic Ocean

2019 ◽  
Vol 53 (22) ◽  
pp. 13136-13145 ◽  
Author(s):  
Luis M. Laglera ◽  
Camila Sukekava ◽  
Hans A. Slagter ◽  
Javier Downes ◽  
Alberto Aparicio-Gonzalez ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Humic Substances ◽  
The Arctic ◽  
The Arctic Ocean

Role of organic matter and humic substances in the binding and mobility of arsenic in a Gangetic aquifer

2011 ◽  
Vol 46 (11) ◽  
pp. 1231-1238 ◽  
Author(s):  
Sandeep Kar ◽  
Jyoti Prakash Maity ◽  
Jiin-Shuh Jean ◽  
Chia-Chuan Liu ◽  
Bibhash Nath ◽  
...  
Keyword(s):  
Organic Matter ◽  
Humic Substances
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