Results 11 to 20 of about 3,379 (185)

Extractable and Non-Extractable Antioxidants [PDF]

Molecules, 2019
In addition to documented scientific interest on antioxidant phytochemicals (plant secondary metabolites) [...]
Alessandra Durazzo, Massimo Lucarini
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Influência da escória silicatada na acidez do solo e na produtividade de grãos do arroz de terras altas Influence of calcium silicate slag on soil acidity and upland rice grain yield

Ciência e Agrotecnologia, 2004
Apesar dos elevados teores de SiO2 total geralmente encontrados nos solos brasileiros, o teor na solução do solo pode ser baixo, em conseqüência do processo de dessilicificação que ocorre durante a intemperização dos solos.
Morel Pereira Barbosa Filho, Francisco José Pfeilsticker Zimmermann, Osmira Fátima da Silva   +2 more
doaj   +1 more source

Extractants Based on Coordinating Liquid Polar Solvents for Removal of Sulfur Compounds from Diesel Fuels

Applied Sciences, 2018
To remove sulfur-containing compounds (SCC) from the diesel fraction 200–360 °C extraction systems have been created based on coordinating organic solvents—dimethylformamide and dimethylsulfoxide, metal chlorides (CoCl2, CuCl2, CdCl2 ...
Natalia Stanislavovna Kobotaeva, Tatiana Sergeevna Skorokhodova, Oleg Semenovich Andrienko, Elena Ivanovna Marakina, Victor Ivanovich Sachkov   +4 more
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To extract or not to extract? [PDF]

Journal of Dentofacial Anomalies and Orthodontics, 2015
Address for correspondence: sorelolivier@wanadoo.fr Our training in dental surgery or stomato­ logy has taught us everything we need to know about teeth: their life and works. We afford them care and protection and, as od­ ontologists, reorganization. Faced by the failure of long­term results for expansion, C.
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Review on the Comparison of the Chemical Reactivity of Cyanex 272, Cyanex 301 and Cyanex 302 for Their Application to Metal Separation from Acid Media

Metals, 2020
Cyanex extractants, such as Cyanex 272, Cyanex 301, and Cyanex 302 have been commercialized and widely used in the extraction and separation of metal ions in hydrometallurgy.
Viet Nhan Hoa Nguyen, Thi Hong Nguyen, Man Seung Lee   +2 more
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Avaliação da disponibilidade de manganês e ferro em solos pelo uso do método modificado da resina de troca iônica Evaluation of manganese and iron availability in soils by a modified ion exchange resin method

Revista Brasileira de Ciência do Solo, 2004
A avaliação do método modificado da resina de troca de íons para extração de Mn e Fe dos solos foi o objetivo desta pesquisa. Foram utilizadas 44 amostras de solo, cujos teores de Mn variaram de baixos a altos e de Fe de médios a altos.
C. A. Abreu, B. van Raij, M. F. Abreu, A. Paz Gonzalez   +3 more
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Synthesis and properties of calix[4]arene telluropodant ethers as Ag+ selective sensors and Ag+, Hg2+ extractants

Beilstein Journal of Organic Chemistry, 2009
Three novel phenyltelluroalkoxyl functionalized tweezer-like calix[4]arenes 6–8 and two monophenyltelluropropoxyl functionalized calix[4]arenes 10 (cone conformer) and 12 (partial cone conformer) were synthesized and characterized.
Yang Lu, Yuanyuan Li, Song He, Yan Lu, Changying Liu, Xianshun Zeng, Langxing Chen   +6 more
doaj   +1 more source

EXTRACT [PDF]

American Journal of Psychiatry
n ...
De Forest, A. H., Butler,
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Extração simultânea de alumínio, cálcio, magnésio, potássio e sódio do solo com solução de cloreto de amônio Simultaneous extraction of aluminum, calcium, magnesium, potassium, and sodium with ammonium chloride solution

Revista Brasileira de Ciência do Solo, 2004
Atualmente, alguns laboratórios de análise de solo determinam Al, Ca e Mg trocáveis em extratos de KCl 1 mol L-1 e K e Na na solução extratora Mehlich-1, também usada na extração de fósforo.
R. C. Boeira, B. van Raij, A. S. Silva, V. C. B. Maximiliano   +3 more
doaj   +1 more source

Comparison of the effectiveness of three extractants in extracting potassium, calcium and magnesium from tropical peat soils [PDF]

Mires and Peat, 2021
Peat soils are frequently analysed using the same standard methods and extractants as for mineral soils, despite the distinctive nature of organic soils.
Ameera Abdul Reeza, Aminuddin Hussin, Osumanu Haruna Ahmed   +2 more
doaj   +1 more source