Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Helen C. Rezende"'
Autor:
Bruno E. S. Costa, Luciana M. Coelho, Cleide S. T. Araújo, Helen C. Rezende, Nívia M. M. Coelho
Publikováno v:
Journal of Chemistry, Vol 2016 (2016)
Arsenic is an element of concern given its toxicological significance, even at low concentrations. Food is a potential route of exposure to inorganic arsenic and in this regard arsenic in rice is associated with soil contamination, fertilizer applica
Externí odkaz:
https://doaj.org/article/e74714a936b5492a922d0ee78b17c6ac
Autor:
Helen C. Rezende, Nívia M. M. Coelho
Publikováno v:
Anal. Methods. 6:9705-9711
A simple method using an ultrasound-assisted single extraction procedure for the determination of Cd, Pb and Cr in phosphate fertilizers by graphite furnace atomic absorption spectrometry was developed. Multivariate optimization through a factorial d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a865e3dc6a654c7566af1c819ef7980
https://doi.org/10.1039/c4ay01443j
https://doi.org/10.1039/c4ay01443j
Autor:
Luciana Melo Coelho, Helen C. Rezende, Nívia M. M. Coelho, Cleide Sandra Tavares Araújo, Bruno Elias dos Santos Costa
Publikováno v:
Journal of Chemistry, Vol 2016 (2016)
Arsenic is an element of concern given its toxicological significance, even at low concentrations. Food is a potential route of exposure to inorganic arsenic and in this regard arsenic in rice is associated with soil contamination, fertilizer applica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be4c4483572f99f3b4ef398de42fc126
https://doaj.org/article/e74714a936b5492a922d0ee78b17c6ac
https://doaj.org/article/e74714a936b5492a922d0ee78b17c6ac
Autor:
João M. Madurro, Helen C. Rezende, Nívia M. M. Coelho, Edmar Isaias de Melo, Ana G. Brito-Madurro
Publikováno v:
Journal of Solid State Electrochemistry. 16:945-951
In this work, carbon electrodes modified with aminophenols were developed for the production of pesticides biosensors based on acetylcholinesterase. The polymers were potentiodynamically deposited on a graphite electrode surface by the oxidation of m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c3426239f06213ea397ca582cc87f84
https://doi.org/10.1007/s10008-011-1458-9
https://doi.org/10.1007/s10008-011-1458-9
Publikováno v:
Microchemical Journal. 97:118-121
Cloud point extraction (CPE) is proposed as a preconcentration procedure for the determination of Cd in soft drinks by thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS). The cadmium reacted with pyridyl-azo-naphthol (PAN) to form h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f20f1ad00d1bc157298a96f70dc9e54
https://doi.org/10.1016/j.microc.2010.08.006
https://doi.org/10.1016/j.microc.2010.08.006
Autor:
Ione L. S. Almeida, Helen C. Rezende, César Ricardo Teixeira Tarley, Nívia M. M. Coelho, Cleide Sandra Tavares Araújo, Vanessa N. Alves, Mariana Gava Segatelli, Rosana Maria Nascimento de Assunção
Publikováno v:
Water Science and Technology. 62:2198-2203
Moringa oleifera seeds were investigated as a biosorbent for removing metal ions from aqueous effluents. The morphological characteristics as well as the chemical composition of M. oleifera seeds were evaluated using Fourier Transform Infrared (FT-IR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c075ea2e0ff3bf9e94510d47f03500ec
https://doi.org/10.2166/wst.2010.419
https://doi.org/10.2166/wst.2010.419
Publikováno v:
Microchemical Journal. 96:82-85
In this study a method for the determination of low concentrations of silver in waters using solid-phase extraction with a flow injection analysis system and detection by flame atomic absorption spectrometry (FAAS) was developed. Moringa oleifera see
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ccf974e80d9700a4044964366d03cfe
https://doi.org/10.1016/j.microc.2010.02.002
https://doi.org/10.1016/j.microc.2010.02.002
Autor:
Luciene M. Coelho, Helen C. Rezende, Nívia M. M. Coelho, Danielle F. O. Melo, Luciana Melo Coelho, Priscila Afonso Rodrigues de Sousa
Publikováno v:
Advances in Bioremediation of Wastewater and Polluted Soil
Water pollution is an issue of great concern worldwide, and it can be broadly divided into three main categories, that is, contamination by organic compounds, inorganic compounds (e.g., heavy metals), and microorganisms. In recent years, the number o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b05c3002d6e8caef729f9f49c0f8f19b
http://www.intechopen.com/articles/show/title/bioremediation-of-polluted-waters-using-microorganisms
http://www.intechopen.com/articles/show/title/bioremediation-of-polluted-waters-using-microorganisms
Autor:
Luciana Melo Coelho, Ione L. S. Almeida, Nívia M. M. Coelho, Helen C. Rezende, Thiago L. Marques
Publikováno v:
Sample Preparation, Vol 2, Iss 1 (2015)
Speciation is a promising and essential tool in the evaluation of the contamination of metals in food and environmental samples. In this context, information about the species of these elements is important considering that toxic effects are directly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed13ab010a33d79e3c1a402ceba03e08
http://www.degruyter.com/view/j/sampre.2014.2.issue-1/sampre-2014-0004/sampre-2014-0004.xml?format=INT
http://www.degruyter.com/view/j/sampre.2014.2.issue-1/sampre-2014-0004/sampre-2014-0004.xml?format=INT
Autor:
Helen C. Rezende, Nívia M. M. Coelho
Publikováno v:
Journal of AOAC International. 97(3)
An ultrasound-assisted extraction procedure was developed for determination of inorganic arsenic (As) in phosphate fertilizer by hydride generation atomic absorption spectrometry. The variables that affect the hydride generation step were optimized,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3dbc083bc842fa0e8c1481d65c04708
https://pubmed.ncbi.nlm.nih.gov/25051618
https://pubmed.ncbi.nlm.nih.gov/25051618