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Itens para a visualização no momento 31-40 of 278
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) ...
Determinação de resíduos de agrotóxicos em mel empregando método QuEChERS modificado e GC-ECD
(Universidade Federal de Santa Maria, 2011-08-03)
The production of honey has been increasing continuously in the world in function of
the greatest consume of natural products. It is related directly to human health, and stimulated
by its therapeutics and nutritious ...
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 ...
Síntese e atividades antimicrobiana/antioxidante de 5-trifluormetil-5-hidróxi-4,5-diidro-1h-pirazóis 1-(2-naftoxiacetil), 1-fenoxiacetil, 1-tiofenoxiacetil, 1-(n-fenilglicina) substituídos
(Universidade Federal de Santa Maria, 2011-07-01)
This work describes an efficient approach for the regioselective synthesis of
new series of substituted 1-(2-naphthoxyacetyl), 1-phenoxyacetyl, 1-thiophenoxyacetyl,
1-(N-phenylglicine)-5-trifluoromethyl-5-hydroxy-4,5-dih ...
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 ...
Metodologia para a determinação de cátions inorgânicos em formulações minerais e fitoquímicas por eletroforese capilar com detecção condutométrica
(Universidade Federal de Santa Maria, 2010-11-18)
The selective determination of inorganic cations, like alkaline, earth-alkaline, of
transition and the ammonium ion (NH4
+) is considered as a difficult practice, because
generally, these ions show very close apparent ...
Reações de enonas trialometilsubstituídas com aminas e diaminas: Síntese de análogos do etambutol
(Universidade Federal de Santa Maria, 2010-02-24)
A series of 5,5,5-trifluoro-3-methyl-(alkylmethylamino)-pentane-1,4-diols, 5,5,5-trifluoro-3-methyl-(arylmethylamino)-pentane-1,4-diols and N,N-bis[5,5,5-
trifluoro-3-methyl-(alkylmethylamino)]-pentane-1,4-diols were ...
Determinação de As, Bi, Sb, Se, Sn e Te por injeção em fluxo com geração de hidretos acoplada a espectrometria de massa com plasma indutivamente acoplado
(Universidade Federal de Santa Maria, 2010-07-23)
In this work it is proposed the development of flow injection systems for hydride generation coupled to inductively coupled plasma mass spectrometry (FI-HG-ICPMS)
for determination of trace elements (As, Bi, Sb, Se, Sn and ...
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 ...
Sintese, análise estrutural e supramolecular de complexos triazenido de Ag(I), Cd(II) E Zn(II)
(Universidade Federal de Santa Maria, 2011-05-23)
In this work was synthesized and determined the crystal and molecular
structure of two silver triazenide complexes, two cadmium triazenide complexes
and a zinc triazenide complex. The complexes
{Ag[C12H9N2NNNC6H4(NO2)](C5H5N)}2 ...