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Determinação de resíduos de agrotóxicos em água empregando microextração líquido-líquido dispersiva (DLLME) e cromatografia líquida de alta eficiência com detecção por arranjo de diodos (HPLC-DAD)
(Universidade Federal de Santa Maria, 2017-07-10)
Water is a natural resource of extreme importance, humans, animals and plants depends directly on it to survive. The state of RS stands out in national scenario as a big producer of many crops, which demand huge amounts ...
Estudo da qualidade do leite in natura recebido pela Usina Escola de Laticínios da UFSM
(Universidade Federal de Santa Maria, 2013-02-21)
Milk is one of the most important foods for human society. Its main components are water, lactose, fat, protein and minerals. It is a delicate and highly perishable product, with its physical, chemical and biological easily ...
Novos polímeros de coordenação e complexos moleculares envolvendo seleninatos e selenonatos
(Universidade Federal de Santa Maria, 2012-07-03)
In this work thirteen new compounds were synthesized and characterized using the
two acids, phenylseleninic (1) and 4-bromophenylseleninic (2) as ligands precursors.
Reactions were carried out using ammonium salts of ...
Prospecção fitoquímica e atividade biológica de plantas medicinais da família asteraceae do bioma pampa
(Universidade Federal de Santa Maria, 2012-04-09)
The species selected for this study were: Pluchea sagittalis, Baccharis
pentodonta and Baccharidastrum triplinervium, all belonging to the Asteraceae
family. The extracts and fractions from leaves and roots of three species ...
Estudo do efeito matriz na determinação de agrotóxicos em diferentes tipos de arroz pelo método QuEChERS modificado e LC-MS/MS
(Universidade Federal de Santa Maria, 2012-03-30)
Rice is socially and economically important because it is the main component of the diet of more than half of the world s population. Brazil is one of the main rice producers in the world and Rio Grande do Sul state yields ...
Βeta-bloqueadores em efluente hospitalar: ocorrência, degradação por processos avançados de oxidação e identificação de subprodutos
(Universidade Federal de Santa Maria, 2011-12-15)
β-Blockers are an important group of prescription drugs; as a consequence of the large and continuous use, they are commonly found in the environment.
This study assessed, preliminary, the inherent risk of the β-blockers ...
Síntese e estrutura de compostos poliaza heterocíclicos
(Universidade Federal de Santa Maria, 2012-07-27)
This work describes the synthesis of a number of polyaza heterocycles and
the mechanistic study to obtain these products. Furthermore, the characterization
was performed by spectroscopic method and the structural study by ...
Síntese de 3-acil-4-aril-2-(trifluormetil)-2-hidróxi-3,4,7,8-tetraidro-2h-cromen-5(6h)-onas via reações multicomponentes e derivatizações
(Universidade Federal de Santa Maria, 2012-08-20)
This work describes firstly the synthesis of a new series of 3-acyl-4-aryl-2-(trifluoromethyl)-2-hydroxy-3,4,7,8-tetrahydro-2H-chromen-5(6H)-ones (4) (thirty-four examples) through the methodology of multicomponent reactions ...
Síntese regiosseletiva de cromenos e cromenonas derivados de organocalcogênio via reações de ciclização intramolecular
(Universidade Federal de Santa Maria, 2012-08-30)
In the first part of this work, a series of organochalcogen propargyl aryl ethers (19 examples) was easily prepared by reaction of propargyl aryl ethers and different organochalcogen electrophilic species. In general, the ...
Mecanismo reacional de etanotiol em eletrodo de ouro e seu comportamento em sistemas redox
(Universidade Federal de Santa Maria, 2012-08-10)
Sulphur compounds can interfere with product quality of the wine, since they have a
characteristic undesirable odor. The ethanethiol is considered an interesting compound from
the electrochemical point of view, since it ...