Spectrophotometric titrations of acid-base systems using flower extracts containig anthocyanins

期刊论文
摘要:
Considering the attraction of the students'attention by the changes in the colors of vegetable crude...
doi:
10.1590/S0100-40422007000400045
作 者:
Cortes, Mônica Souza...
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Quimica nova

Spatial distribution of iron, copper and lead in mangrove sediments in a degradation gradient in Guanabara Bay (Rio de Janeiro State)

期刊论文
摘要:
Iron, copper andlead distribution was evaluated in sediment cores from a disturbed mangrovearea in G...
doi:
10.1590/S0100-40422007000100015
作 者:
Machado, Wilson;Patc...
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Quimica nova

Practical in organometallic chemistry: preparation of dicarbonylcyclopentadienyliron(II) chloride

期刊论文
摘要:
In this work, wedescribe a new method for obtaining [Fe(CO)2[(h5-C5H5)Cl]employing simple techniques...
doi:
10.1590/S0100-40422007000200045
作 者:
Vasconcellos, Suzan ...
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Quimica nova

Carotenoids: properties, applications and biotransformation in flavor compounds

期刊论文
摘要:
Carotenoids arewidely distributed in nature, providing yellow, orange or red color in a greatnumber ...
doi:
10.1590/S0100-40422007000300022
作 者:
Uenojo, Mariana;Maró...
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Quimica nova

Alkaline battery: a useful device in the teaching of chemistry

期刊论文
摘要:
This paper presents the alkaline battery (MnO2/Zn)as a useful device in the teaching of chemistry. T...
doi:
10.1590/S0100-40422007000400046
作 者:
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Quimica nova

Ecomaterials: development and application of functional porous materials for environmental protection

期刊论文
摘要:
Fundamental aspectsof the conception and applications of ecomaterials, in particular porous material...
doi:
10.1590/S0100-40422007000200039
作 者:
Ferreira, Odair Past...
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Quimica nova

Validation of analytical methodology for simultaneous evaluation of mebendazole and thiabendazole in tablets by high performance liquid chromatography

期刊论文
摘要:
The aim of this work was to develop and validatean analytical methodology for simultaneous determina...
doi:
10.1590/S0100-40422007000500050
作 者:
Sena, Marcelo M.;Pau...
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Quimica nova

Contents of synthetic dyes in foods determined by high performence liquid chromatography

期刊论文
摘要:
Synthetic dyesare much used in processed foods. HPLC was applied to different types of snacks,such a...
doi:
10.1590/S0100-40422007000200005
作 者:
Prado, Marcelo Alexa...
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Quimica nova

Microbiological oxidative dissolution of a complex mineral sample containing pyrite (FeS2), pyrrotite (Fe1-xS) and molybdenite (MoS2)

期刊论文
摘要:
This work aims to study the oxidation of a complexmolybdenite mineral which contains pyrite and pyrr...
doi:
10.1590/S0100-40422007000500008
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Quimica nova

Use of Blue Rayon for the extraction/concentration of polycyclic compounds in the aquatic environment

期刊论文
摘要:
This is a reviewabout the use of Blue rayon in the extraction and concentration of environmentalcont...
doi:
10.1590/S0100-40422006000300022
作 者:
Umbuzeiro, Gisela de...
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Quimica nova
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