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Análise fitoquímica e estudo das atividades antimicrobiana, antioxidante e de inibição da enzima acetilcolinesterase das espécies Zanthoxylum rhoifolium e Zanthoxylum hyemale
(Universidade Federal de Santa Maria, 2010-10-22)
The present study was designed to evaluate the biological activity from the stem bark of Zanthoxylum rhoifolium and Zanthoxylum hyemale. The neutral methanol extract and
fractions of this extract, the basic fractions that ...
Especiação de enxofre orgânico em cimento asfáltico de petróleo e suas frações
(Universidade Federal de Santa Maria, 2022-07-22)
The asphalt binder is composed mostly of aromatic hydrocarbons. However, the presence of sulfur in the matrices warrant special attention, since it stands out for being the major heteroatom. Sulfur compounds are known for ...
5-Hidróxi-4,5-Diidro-1h-1-(2-hidroxibenzoil)pirazóis: planejamento, síntese e analgesia
(Universidade Federal de Santa Maria, 2007-02-23)
An efficient method to obtain six 4-alkoxy-2-oxo-but-3-enoic acid ethyl esters [EtO2CC(O)C(R2)=C(R1)OR, where R1/R2/R = Me/H/Me (2a), Ph/H/Me (2b), 4-MeC6H4/H/Me (2c), 4-BrC6H4/H/Me (2d), 4-FC6H4/H/Me (2e), H/Me/Et (2f)] ...
Desenvolvimento de método para determinação de resíduos de agrotóxicos em azeite de oliva empregando GC-MS/MS
(Universidade Federal de Santa Maria, 2022-03-16)
In Brazil, olive oil is defined as a product obtained from the fruits of the olive tree Oleaeuropaea L. and it is already configured in the international scenario as the second largest importer of olive oil. Olive oil has ...
Síntese de 1,3-oxazinas e 1,2,3-triazóis derivados de cumarina
(Universidade Federal de Santa Maria, 2019-02-19)
In this work we developed a methodology for the synthesis of 1,3-oxazines
derived from aminocoumarins by the hydroxymethylation/acetalization reaction with
aldehydes catalyzed by H2SO4 in aqueous media. The scope and ...
Sintese e avaliação como fotossensibilizadores de novos triazoil-fulerenos funcionalizados com AZT e com calcogenos derivados de AZT
(Universidade Federal de Santa Maria, 2014-08-07)
Herein we report the synthesis of a new class of AZT-functionalized fullerenes. The synthetic strategic furnished the desired products in few reactional steps, in a convergent manner, in yields ranging from 22 to 43 ...
Síntese estereosseletiva de tioespiro[4.n]alcanonas e reatividade de (E)-1-(3-benzilideno-2-metoxiciclohexenil)-2,2,2- trifluoretanona
(Universidade Federal de Santa Maria, 2022-05-06)
The present thesis initially describes a methodology for obtaining two series of
diastereoisomers of 1-aryl-4-hydroxy-2-thiaspiro[4,5]alkan-6-ones (5a-k and 6a-k), totaling 22
novel compounds by sulfa-Michael addition ...
Determinação multirresíduo de agrotóxicos em banana empregando método QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-04-29)
In recent years, it has been possible to observe that the use of pesticides in various cultures has increased alarmingly and, in most cases, is added to an inappropriate practice of use, as well as impr oper disposal. ...
Oligoésteres e poliésteres obtidos a partir do ácido oleico modificado com forma estrela: síntese e caracterização físico-química
(Universidade Federal de Santa Maria, 2012-07-30)
This works investigated the curing reaction of epoxidized oleic acid starshaped
with different anhydrides, forming product as oligoésteres and polyesters.
Oleic acid modified was obtained by esterification of oleic acid ...
Hidazida 6-hidrazinonicotínica: síntese quimio e regiosseletiva de piridinohidrazonas, ácidos pirazolil-nicotínicos e heterociclos derivados
(Universidade Federal de Santa Maria, 2012-04-20)
The present research firstly describes the study of methods for the hydrolysis of amide bond [C(O)-N] in 2-(5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazol-1-yl)-5-(5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazol-1 ...