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Itens para a visualização no momento 11-20 of 46
Determinação de compostos organosulfurados como marcadores dos processos de envelhecimento em matrizes asfálticas brasileiras
(Universidade Federal de Santa Maria, 2018-03-01)
The involvement of organosulfur species in the aging processes of Brazilian asphalt cements was studied using analytical methodologies such as ultra high performance liquid chromatography with atmospheric pressure ...
Efeitos causados por nanopartículas de La2O3 em Pfaffia glomerata (Spreng.) Pedersen e estudo da distribuição de elementos por LA-ICP-MS
(Universidade Federal de Santa Maria, 2018-03-02)
The effect of La2O3 nanoparticles (NP-La2O3) on plants of the species
Pfaffia glomerata (Spreng.) Pedersen was investigated. Besides, the translocation
and the distribution of the NPs in aerial parts of the plant were ...
Síntese e avaliação biológica dos compostos 3-triazoilcalcogeniltimidina
(Universidade Federal de Santa Maria, 2018-02-26)
This work describes the synthesis and antioxidant and antitumoral activity of 3-triazoylcalcogenylthymidine (7a-o). A variety of nucleoside analogues were prepared using a Huisgen 1,3-dipolar cycloaddition, between the ...
Análise multivariada aplicada no estudo de dentifrícios comercializados no Brasil
(Universidade Federal de Santa Maria, 2018-03-02)
In this work we investigate the similarity between the chemical compositions described on the
packaging of Brazilian dentifrice samples and the concentrations of fluoride and pH in
dentifrices marketed in South Brazil. ...
Investigação de metabólitos secundários de Tabernaemontana catharinensis A. DC. – (Apocynaceae) e suas potenciais atividades antimicrobianas
(Universidade Federal de Santa Maria, 2018-07-17)
The phytochemical investigation of hexane and methanolic crude extracts and their fractions from the
bark of the stem of Tabernaemontana catharinensis (Apocynaceae, commonly known as cobrina) led
to the isolation of nine ...
Desenvolvimento de método para determinação de paraquate, diquate, clormequate e mepiquate em cevada e trigo utilizando HILIC-UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2018-07-20)
Quaternary ammonium compounds (QUATs) constitute an important class of agrochemicals that include paraquat, diquat, chlormequat and mepiquat. Among these, paraquat is one of the most well-known herbicides in the world, ...
Geradores triboelétricos de baixo custo para a captação de energia a partir de pavimentos urbanos
(Universidade Federal de Santa Maria, 2018-12-07)
The conversion of mechanical energy into electrical energy from triboelectric phenomena has being actively searched due to growing demand for energy worldwide and proof of concept and applications are being made by using ...
Arquiteturas metalo-supramoleculares em derivados de aroilbistioureias
(Universidade Federal de Santa Maria, 2018-08-03)
This work presents the synthesis and characterization of twenty-six compounds divided into two main
groups. The first one approaches compounds containing the oxidorhenium(V) {ReO}3+ moeity and the
ligands benzoyl(N,N-d ...
Síntese e avaliação fotofísica de compostos fulereno[60]-glicoconjugados
(Universidade Federal de Santa Maria, 2018-09-19)
In the midst of a variety of alternative therapies in the treatment of several diseases, the photodynamic therapy appears as a versatile protocol. This therapy uses the absorptive properties of photoactive molecules, called ...
Síntese, caracterização estrutural e estudo fotofísico de cromóforos diflúor-organoboro derivados de azaheterociclos
(Universidade Federal de Santa Maria, 2018-07-11)
The present work presents the synthesis and spectroscopic study of new oxadiazaborinine derivatives from 2-amino substituted azaheterocycles systems, subdivided into four different classes of azaheterocycles, these are ...