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Resíduos de agrotóxicos em água potável usando SPE e determinação rápida por LC-MS/MS e GC-MS/MS
(Universidade Federal de Santa Maria, 2012-08-31)
The use of pesticides always has been associated with the effective control of pests
or invasive weeds to ensure an increase in the food production. However, the indiscriminate
use of these substances has caused the ...
Influência dos sistemas nanoestruturados na fotoestabilidade e na atividade antioxidante dos compostos fenólicos eugenol, isoeugenol e dehidrodieugenol
(Universidade Federal de Santa Maria, 2012-02-23)
There is a great interest in the study of antioxidants, mainly due to the findings on the effect of radicals in the body. These radicals are needed in many biological processes, but also may be related to processes harmful ...
BTEX: Desenvolvimento de barras de extração sortiva, determinação em efluente hospitalar e degradação por meio de fotocatálise heterogênea com TiO2 suportado em polímeros
(Universidade Federal de Santa Maria, 2012-02-24)
In this work were developed low cost bars of sorptive extraction, using commercial adhesive based on polydimethylsiloxane (PDMS) for the preconcentration and determination of benzene, toluene, ethylbenzene and xylene (BTEX) ...
Desenvolvimento de métodos de preparo de amostras para posterior determinação de As, Cd e Pb em carne e produtos cárneos
(Universidade Federal de Santa Maria, 2012-12-05)
Sample preparation methods, such as microwave-assisted wet digestion, dry ashing, wet digestion in open system and tetramethylammonium hydroxide (TMAH) solubilization were evaluated for subsequent As, Cd and Pb determination ...
Avaliação de métodos de preparo de amostras para a determinação de cloro em temperos
(Universidade Federal de Santa Maria, 2012-05-24)
In this study, sample preparation methods were evaluated for the
determination of chlorine by ion chromatography (IC) in spice samples. The
microwave-induced combustion method (MIC) was tested using certified ...
Análise de dados de RMN, deslocamentos químicos e constantes de acoplamento do sistema de hidrogênios ABX em 3,5-diaril-4,5-diidro-1H-pirazóis
(Universidade Federal de Santa Maria, 2012-09-10)
This dissertation first describes the collection of literature data among the years 2005 to 2011 for the subsequent data analysis of 1H NMR chemical shifts and coupling constants and 2JHH 3JHH with emphasis on the synthesis ...
Síntese regiosseletiva de 4-trifluormetil-2-(metiltio)-3,4-diidropirimidin-4-óis 3,6-dissubstituídos com efeito inibitório enzimático
(Universidade Federal de Santa Maria, 2012-02-27)
This work reports a simple and versatile new strategy for the regiosselective synthesis of N3-substituted 6-alkyl(aryl or heteroaryl)-4-trifluoromethyl-2-(methylthio)-3,4-dihydropyrimidin-4-ols, which enabled to establish ...
Síntese de novos derivados 3-tioindólicos
(Universidade Federal de Santa Maria, 2012-07-23)
Não foi possível inserir o abstract.
Determinação de resíduos de agrotóxicos no leite bovino empregando método QuEChERS modificado e GC-MS/MS
(Universidade Federal de Santa Maria, 2012-03-26)
For providing a balanced composition, among fresh food, the milk is considered one
of the most nutritionally complete, being a product very well accepted in the market
with consumers of all ages. Thus, the analysis of ...
Síntese e análise estrutural de polímeros de coordenação e compostos moleculares derivados de Hg(TeAr)2
(Universidade Federal de Santa Maria, 2012-07-27)
This work presents a study related to the synthesis and structural analysis of
coordination polymers and molecular compounds derived from Hg(TeAr)2. Was used
as starting reagents some Hg(TeAr)2, considered basic building ...