Results 21 to 30 of about 1,436,133 (292)

Manganese and zinc in acidic agricultural soils from Central Spain: Distribution and phytoavailability prediction with chemical extraction tests [PDF]

open access: yes, 2009
The extractability and distribution of manganese (Mn) and zinc (Zn) were evaluated in acidic agricultural soils from Central Spain. Both single (0.1 M hydrochloride [HCl] and 0.05 M ethylenediaminetetraacetate [EDTA]) and sequential extraction procedures
López Valdivia, Luis Manuel   +4 more
core   +2 more sources

Síntese de complexo ferro(II)-nitrogênio: abordagem dos conceitos de reatividade e retro-doação para alunos de graduação em química Synthesis of the iron(II)-nitrogen complex: concepts of reactivity and back-bonding for undergraduate chemistry students

open access: yesQuímica Nova, 2007
There has been a considerable interest in coordination complexes of molecular nitrogen (N2), partly due to a possible relationship between such complexes and the nitrogen activation process in nature.
Fábio L. Pissetti   +3 more
doaj   +1 more source

Kinetic determination of As(III) in solution [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
A new reaction is suggested and a new kinetic method is elaborated for the As(HI) traces determination in solution, on the basis of their catalyzing effect on komplexon III (EDTA) oxidation by KMnO4 in a strong acid solution (H2SO4).
Rančić Sofija M.   +2 more
doaj   +1 more source

Influence of chemical speciation on the separation of metal ions from chelating agents by nanofiltration membranes [PDF]

open access: yes, 2018
The simultaneous separation of various metal ions (nickel, copper, calcium, and iron) from chelating agents (EDTA and citric acid in water streams using Nanofiltration membranes is analyzed.
Balanya Martí, Teresa   +3 more
core   +2 more sources

Phytoremediation based on canola (Brassica napus L.) and Indian mustard (Brassica juncea L.) planted on spiked soil by aliquot amount of Cd, Cu, Pb, and Zn

open access: yesPlant, Soil and Environment, 2007
The use of plants to remove heavy metals from soil (phytoremediation) is expanding due to its cost-effectiveness as compared to conventional methods and it has revealed a great potential. Since contaminants such as Pb or Cd have a limited bioavailability
M. Turan, A. Esringü
doaj   +1 more source

Evaluation of Antioxidative and Antidiabetic Activity of Bark of Holarrhena Pubescens Wall [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2014
Objective: The objectives of the study are to screen out various phytochemicals and to evaluate the antioxidant and antidiabetic potential of the stem bark of Holarrhena pubescens Wall (Holarrhena antidysenterica).
Anup Bhusal   +5 more
doaj   +1 more source

Effects of ultrasonically activated irrigants with or without surfactant on smear layer removal after post space preparation [PDF]

open access: yes, 2012
The aim of this study was to compare the effects of different NaOCl and EDTA formulations with/without ultrasonic use on smear layer removal and root canal surface characteristics after post space preparation. Study design: After post space preparations,
Altundasar, Emre   +4 more
core   +1 more source

The role of Fe- and Mn-oxides during EDTA-enhanced phytoextraction of heavy metals

open access: yesPlant, Soil and Environment, 2007
In several cases ethylenediaminetetraacetic acid (EDTA) proved to be an efficient mobilising amendment during chemically enhanced phytoextraction of heavy metals.
M. Komárek   +4 more
doaj   +1 more source

Phytoextraction of lead by Helianthus annuus: effect of mobilising agent application time

open access: yesPlant, Soil and Environment, 2008
Pot experiments were conducted to determine the best time for application of (ethylenediaminetetraacetic acid) EDTA and sheep manure extract (SME) in phytoremediation of a contaminated soil by Helianthus annuus.
A.A. Safari Sinegani, F. Khalilikhah
doaj   +1 more source

Clerocidin selectively modifies the gyrase-DNA gate to induce irreversible and reversible DNA damage [PDF]

open access: yes, 2008
Clerocidin (CL), a microbial diterpenoid, reacts with DNA via its epoxide group and stimulates DNA cleavage by type II DNA topoisomerases. The molecular basis of CL action is poorly understood.
Binaschi   +34 more
core   +1 more source

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