Buscar
Itens para a visualização no momento 31-40 of 42
Síntese de compostos α-organiltio carbonílicos utilizando sais de bunte como fonte de enxofre
(Universidade Federal de Santa Maria, 2020-02-21)
In this work, a series of α-organylthio carbonyl compounds were synthesizes from β-ketoesteres and Bunte salts, using NaOH as a reaction promoter in toluene at 100 ºC. The selectivity for the formation of two products, ...
Estudo de adsorção gás-sólido de hidrocarbonetos policíclicos aromáticos em diferentes adsorventes
(Universidade Federal de Santa Maria, 2020-09-25)
The extraction and the gas-solid adsorption behavior of different polycyclic aromatic hydrocarbons (PAHs) were studied in aqueous solution and in four different asphalt petroleum cement (APC) samples, using high-performance ...
Síntese de 1H-isocalcogênocromenos via NA2SE a partir de derivados de eninos
(Universidade Federal de Santa Maria, 2020-02-21)
In the present work, we developed the synthesis of 1H-isocalcogenochromene via a nucleophilic
addition of Na2Se to enynes. The reaction parameters were studied and the results
indicated that the reaction of enynes (0.25 ...
Síntese e propriedades fotofísicas de bases de schiff e 1,3-benzoxazinas derivadas de 6-amino-4-(trifluormetil)quinolinas
(Universidade Federal de Santa Maria, 2020-09-24)
The present work describes the synthesis, structural study and evaluation of the photophysical properties of new Schiff bases, (E)-2-(((2-(alkyl/aryl/heteroaryl)-4-trifluormethyl)quinolin-6-il)imino)methyl)phenols, as well ...
Desenvolvimento de método colorimétrico utilizando dispositivo portátil para a determinação de cloreto em petróleo
(Universidade Federal de Santa Maria, 2020-09-24)
In this work, a colorimetric method was developed for the determination of chloride in crude oil using a portable device based on digital images obtained with an endoscopic camera and data processing using the PhotoMetrix ...
Síntese e dinâmica rotacional de [2]rotaxanos contendo 1-benzidrilpiperazina no eixo molecular
(Universidade Federal de Santa Maria, 2020-02-03)
This dissertation describes the synthesis of molecular the threads ((E)-1,4-bis(4-benzydrylpiperazin-1-yl)but-2-ene-1,4-dione, 1,4-bis(4-benzydrylpiperazin-1-yl)butan-1,4-dio ne, (E)-1,4-bis(dibutylamine)but-2ene-1,4-dione ...
Aspectos inorgânicos e físico-químicos na determinação espectrofotométrica do radical 1,1-difenil-2-picrilhidrazil.
(Universidade Federal de Santa Maria, 2020-11-06)
The DPPH method has been reported with misconceptions in a large number of studies,
precluding the direct comparison of results. Attention is drawn to a common mistake in the unit
used to express the IC50 value of ascorbic ...
Síntese de 1-alquil-4-aminoalquil-2-trifluormetil-1H-pirróis e 1,2,3- triazóis derivados
(Universidade Federal de Santa Maria, 2020-12-04)
In the present work, it was carried out a study of the reactivity of 5-bromo-1,1,1-trifluoro-
4-methoxypent-3-en-2-one (5-bromo enone) towards primary aliphatic amines, which furnishes
as products two novel series of ...
Efeitos do ultrassom na preparação de emulsões do fluconazol usando líquidos iônicos N-alquil-N-metilimidazolíneos
(Universidade Federal de Santa Maria, 2020-10-27)
Fluconazole is an active drug against a wide spectrum of species of fungi, this compound is used to treat
superficial and systemic fungal infections. However, this medicine has dissolution problems, which causes
limitations ...
Síntese, caracterização e aplicação biológica de complexos derivados de bismuto(III) com ligantes do tipo aroiltioureias
(Universidade Federal de Santa Maria, 2020-03-06)
This work describes the synthesis, structural characterization and biological applications of four new bismuth(III) compounds with aroylthioureas as ligands: 1 - [Bi(La-O,S)3(HLa-S)], 2 - [Bi2(Lb-O,S)4(-Lb-12O,S,2 ...