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Determinação de halogênios em amostras biológicas por espectrometria de absorção molecular de alta resolução com fonte contínua e forno de grafite
(Universidade Federal de Santa Maria, 2014-04-28)
Determinação de elementos-traço em amostras de nitreto de alumínio e nitreto de silício por análise direta de amostras sólidas em espectrometria de absorção atômica com forno de grafite
(Universidade Federal de Santa Maria, 2008-03-28)
A graphite furnace atomic absorption spectrometry method using direct
solid sampling has been developed for the determination of Cr, Cu, Fe, K, Mn, Sb
and Zn in powdered AlN and Si3N4. Owing to the vaporization of AlN ...
Estudo dos constituintes quimicos isolados de plantas medicinais da região do vale do Purus no Acre (Amazônia)
(Universidade Federal de Santa Maria, 2003-12-19)
The present work describes especially the extraction, isolation and identification of the chemical compounds of the tuber of Humirianthera ampla Miers (Icacynaceae) and the barks of the Himatanthus sucuuba Spruce (Apocynaceae). ...
Determinação das constantes de estabilidade dos complexos formados entre os aminoácidos cisteína, cistina, ornitina e lisina com alumínio em solução aquosa
(Universidade Federal de Santa Maria, 2004-07-29)
The complex formation between aluminium and the amino acids ornithine, lysine, cysteine and cystine was evaluated by means of potentiometric titration. The titration was carried out in aqueous solution with constant ionic ...
Reações regioespecíficas de β-alcoxivinil trialometil cetonas com heteroaroilhidrazinas
(Universidade Federal de Santa Maria, 2004-12-20)
This work describe the regiospecific synthesis of three novel series of 1-(2-thenoyl)-, 1-(2-furoyl)- and 1-(isonicotinoyl)-3-alkyl(aryl)[heteroaryl]-5-hydroxy-5-trihalomethyl-4,5-dihydro-1H-pyrazoles, in good yields (50 ...
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 ...
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 ...
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 ...
Determinação de flavonóides e resveratrol em vinho empregando cromatografia de fluxo turbulento-LC-MS
(Universidade Federal de Santa Maria, 2008-03-10)
Wine is known for its favorable biochemical properties such as antioxidant, anticarcinogenic and anti-inflamatory properties. Many of these properties can be assigned to flavonoids and resveratrol. Wine is known to contain ...
Obtenção de novos heterociclos derivados do ácido levulínico
(Universidade Federal de Santa Maria, 2013-09-30)
This study describes the attainment of twenty three (23) bis-heterocycles derived from the Levulinic Acid: Bis-Pyrazoles (6a-k) by the reaction of cyclecondensation between the 3-(5-(trifluoromethyl)-4,5-dihydro-1H-pyraz ...