Results 11 to 20 of about 5,722,673 (193)
A Review on Spectrometer of Pb(II) in Water [PDF]
, 2015 Heavy metals have many characteristics such as susceptible to bio-accumulation, ecological amplification effect, and high toxicity and so on. Heavy metal pollution in water not only destroys the ecological environment, but also threat to human health and life seriously.
Di Zhang, Ming Sun, Ling Zou
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, 2021 The silica@mercapto (HS@M) hybrid adsorbent was successfully synthesized from Takari sand and modified with mercapto. The HS@M was synthesized using the sol-gel method.
J. Naat +6 more
semanticscholar +1 more source
Zn(ii), Cd(ii) and Pb(ii) complexation with pyridinecarboxylate containing ligands [PDF]
Dalton Transactions, 2008 Herein, we report the coordination properties towards Zn(ii), Cd(ii) and Pb(ii) of two hexadentate ligands containing pyridinecarboxylate groups with ethane-1,2-diamine (bcpe) or cyclohexane-1,2-diamine (bcpc) backbones. The X-ray crystal structures of [Zn(bcpe)], [Cd(bcpe)] and [Cd(bcpc)] show hexadentate binding of the ligand to the metal ions, with ...
Ferreirós-Martínez, Raquel +4 more
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Biotemas, 2013 Este estudo teve por objetivo analisar as medidas biométricas externas e do sistema digestório e, também, as condições corpóreas e de plumagem de gaviões-carijó apreendidos pelo CETAS/IBAMA na Paraíba, e descrever a histologia das vísceras do trato ...
Millena de Oliveira Firmino +4 more
doaj +1 more source
Controladores digitais de corrente para máquinas de indução
Eletrônica de Potência, 1996 Esse trabalho apresenta a análise, projeto e implementaçáo prática da malha de corrente para um máquina de induçáo. Três diferentes estratégias de controle são investigadas: o controlador preditivo e os controladores PI síncrono e estacionário.
Alexandre C. Oliveira +2 more
doaj +1 more source
Poly(vinylbenzyl Pyridinium Salts) as Novel Sorbents for Hazardous Metals Ions Removal
Molecules, 2022 Novel efficient complexing resins—poly(vinylbenzyl pyridinium salts) fabricated through poly(vinylbenzyl halogene-co-divinylbenzene) quaternization of N-decyloxy-1-(pyridin-3-yl)ethaneimine and N-decyloxy-1-(pyridin-4-yl)ethaneimine—were tested as ...
Karolina Wieszczycka +4 more
doaj +1 more source
Journal of Environmental Chemical Engineering, 2020 This study reports the potential for the simultaneous removal of Cd(II), Co(II), Cu(II), Pb(II), and Zn(II) ions from aqueous solutions by FAU-type zeolites prepared from coal fly ash.
I. V. Joseph, L. Tosheva, A. M. Doyle
semanticscholar +1 more source
Electrical conductivity in Pb(II)- and Na(I)-Pb(II)-β″-alumina
Journal of Solid State Chemistry, 1990 Abstract Pb(II)- β ″-alumina, Pb 0.83 Mg 0.67 Al 10.33 O 17 , is a divalent isomorph of the well-known fast ion conductor, Na(I)- β ″-alumina, and is distinguished by having the highest ionic conductivity of the known divalent β ″-aluminas. The electrical properties of this compound are extremely sensitive to the presence of water.
G.S. Rohrer, G.C. Farrington
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Effects of Temperature and Salt Stress on Cereus fernambucensis Seed Germination
BiologyThe Brazilian Atlantic Forest is recognized as a biodiversity hotspot with high levels of Cactaceae endemism, attracting significant attention for conservation efforts [...]
João Henrique Constantino Sales Silva +4 more
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Analysis of Phenotypic Variability in Natural Populations of Cereus fernambucensis Lem. (Cactaceae)
BiologyGenetic diversity is essential for species adaptation, evolution, and conservation and is a determining factor in plants of ecological and agronomic interest, such as Cereus fernambucensis (Cactaceae).
João Henrique Constantino Sales Silva +4 more
doaj +1 more source