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Síntese e análise estrutural de complexos de urânio(VI) com hidrazonas, semicarbazonas e ligantes relacionados
(Universidade Federal de Santa Maria, 2006-10-02)
Uranyl complexes with ligands with oxygen and nitrogen donors have been extensively reviewed and they have aroused interest on account of their high stability, usefulness in selective chemical separations and their formation ...
Estudo fitoquímico e atividade biológica de Pavonia distinguenda A.ST.- HILL. et naudin e Dorstenia brasiliensis LAM
(Universidade Federal de Santa Maria, 2007-03-01)
From the aerial parts of Pavonia distinguenda the glycosilated flavonoids, tirosilide and astragalina glycolilated flavonoids were isolated, among free b-sitosterol, lupeol, taraxerol, germanicol and from the roots of ...
Desenvolvimento de metodologia para análise de especiação de cromo em fertilizantes orgânicos
(Universidade Federal de Santa Maria, 2022-10-28)
In this work, a methodology was developed for the analysis of chromium speciation in organic fertilizer by liquid chromatography coupled to inductively coupled plasma mass spectrometry (LC-ICP-MS). For the evaluation of ...
Estudo de métodos empregando HPLC-DAD e LC-MS/MS para a determinação de resíduos de herbicidas em água e solo do cultivo de arroz irrigado
(Universidade Federal de Santa Maria, 2007-12-20)
The irrigated agriculture of Rio Grande do Sul (RS) it is responsible for about 50% of the Brazilian production of rice, and the success of the production depends, generally, of the application of chemical substances. Many ...
Estudo de métodos empregando extração em fase sólida e análise por HPLC-DAD e GC-ECD para a determinação de resíduos de pesticidas em águas e da degradação a campo
(Universidade Federal de Santa Maria, 2007-02-26)
The culture of irrigated rice generates a great impact to the environment, both in the amount and the quality of waters. In this study, a methodology was developed and validated for the determination, in waters, of residues ...
Desenvolvimento e validação de método para determinação multiresíduo de agrotóxicos em urina empregando método QuEChERS e LC-MS/MS
(Universidade Federal de Santa Maria, 2022-09-16)
Pesticides have been widely used in food crops to control pests, weeds, fungi, etc. The
indiscriminate use of these organic compounds has contributed to the increase in
cases of intoxication in humans, which can lead to ...
Síntese de 3H-pirido[2,3-b][1,4]diazepinos trifluormetil substituídos e diazepinonas análogas
(Universidade Federal de Santa Maria, 2006-12-19)
The present research describes new synthetic methodologies for the synthesis of new series of 2-aryl(heteroaryl)-4-trifluoro-4,5-dihydro-3Hpyrido[2,3-b][1,4]diazepin-4-ols and 2-aryl(heteroaryl)-3H-pyrido[2,3-b][1,4]diaz ...
Síntese estereosseletiva de α-fenilseleno-β-amino ésteres pela reação do tipo-Mannich e efeito promotor de tiofenol na reação de Pictet-Spengler.
(Universidade Federal de Santa Maria, 2006-06-21)
In the present work, it was developed a new methodology for the stereoselective synthesis of α-phenylseleno-β-amino esters by the Mannich-type reaction. These reactions
involve chlorotitanium α-phenylseleno esters enolates ...
Desenvolvimento de métodos alternativos para a extração e determinação de compostos sulfurados e nitrogenados em óleo diesel
(Universidade Federal de Santa Maria, 2022-08-26)
This work aimed to developed methods to contribute to the understanding of the
structure of sulfur and nitrogen compounds, as well as the fraction of basic nitrogen
present in diesel oil. Sample preparation methods were ...
Síntese e caracterização estrutural de pirazolinil-tolil-sulfonas trialometil substituídas de interesse antimicrobiano
(Universidade Federal de Santa Maria, 2006-02-02)
The present research describes the use of b-alcoxyvynil
trihalomethyl ketones [CX3C(O)CR2CR1R, where X= Cl, F; R= OMe, OEt; R1: H, Me, Ph, 4-MePh, 4-MeOPh, 4-BrPh, 4-ClPh, 4-FPh; R2= H, Ph] in the regiospecific synthesis ...