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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 de pesticidas e compostos relacionados em água de superfície e efluente industrial empregando extração em fase sólida e cromatografia gasosa acoplada à espectrometria de massas
(Universidade Federal de Santa Maria, 2004-08-20)
To assist the growing nutritious demand, caused by the great population increase, the use of pesticides has been intensified in the agriculture. Such products improve the agricultural productivity and could reduce the food ...
Decomposição de carbamazepina em sistema fechado por combustão iniciada por microondas para posterior determinação de Cd, Cu e Pb
(Universidade Federal de Santa Maria, 2005-03-02)
In this work, a decomposition procedure was proposed based on sample combustion assisted by microwave radiation. Samples of carbamazepine, a medicine used in the treatment of the epilepsy were used. The decomposition of ...
Influência de modificadores orgânicos na determinação de chumbo em amostras de suplementos de cálcio por GF AAS
(Universidade Federal de Santa Maria, 2004-03-04)
The main goal of this study was to evaluate the effect of organic modifiers in the determination of lead in calcium supplement samples by graphite furnace atomic absorption spectrometry (GF AAS). Samples of refined calcium ...
Estudo da influência de modificadores químicos para a determinação de chumbo por GF AAS na presença de sulfatos
(Universidade Federal de Santa Maria, 2005-03-03)
Lead determination by graphite furnace atomic absorption spectrometry may be affected by some interferences. Several authors have reported that lead determination may be affected in the presence of some salts (carbonates ...
Determinação de cádmio e manganês com pré-concentração por FI-FAAS e aplicação em aditivo alimentar à base de fosfatos
(Universidade Federal de Santa Maria, 2005-09-02)
Cadmium is a toxic element even at low concentration and is no essential for human metabolism, while Mn is essential and no toxic at low concentration. For that reason, it is important to have sensitive and accurate methods ...
Síntese de 4-(fur-2-il)- e 4-(tien-2-il)-pirimidinas a partir de β-Alcoxivinil trifluormetil cetonas
(Universidade Federal de Santa Maria, 2005-08-01)
The cyclocondensation of the 1,1,1-trifluoro-4-methoxy-4-(2-heteroaryl)-3-buten-2-ones (heteroaryl = furyl and thienyl) with urea and amidines (acetamidine, benzamidine, guanidine, 1H-pyrazole-1-carboxamidine and ...
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 ...
Caleol: modificações estruturais, estereoquímica absoluta e atividade antimicrobiana dos derivados
(Universidade Federal de Santa Maria, 2011-02-24)
The essential oil of the leaves of Calea clematidea, a plant of Asteraceae
family used in the folk medicine in treatment of flu, stomachic disease and gastric
ulcer, was extracted and of it was isolated the monoterpene ...