Buscar
Itens para a visualização no momento 811-820 of 905
Produção biotecnólogica de ácido succínico a partir de casca de arroz
(Universidade Federal de Santa Maria, 2013-12-16)
Rice husk is a subproduct of the food industry, rich in carbohydrates, which can be partially
fractionated and converted into fermentable sugars. In this work, it was investigated the best
conditions for the conversion ...
Agregação e força de interação cátion-ânion de líquidos iônicos dicatiônicos derivados do imidazol com os ânions ascorbato e ibuprofenato
(Universidade Federal de Santa Maria, 2021-01-29)
Imidazolium-based ionic liquids (ILs) demonstrate some advantages over the monocationic analogues, as higher fusion temperature, higher thermal stability and less toxicity. Dicationic ILs also form tridimensional aggregates ...
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 ...
Espectrometria de absorção atômica com tubo aquecido na chama e amostragem direta de sólidos para determinação de manganês e níquel em coque de petróleo
(Universidade Federal de Santa Maria, 2009-07-28)
A solid sampling flame furnace atomic absorption spectrometry (SS-FF-AAS)
system was developed in this work for Mn and Ni determination in petroleum coke.
The proposed solid sampling system was made in quartz, with two ...
Physical-chemical study of effects of functional groups on adsorption of naphthalene and its derivatives onto high-density polyethylene microplastics
(Universidade Federal de Santa Maria, 2023-03-15)
Microplastics (MP) have received great attention due to the mass-produced
residues discharged into the environment. MP are ideal for adhering to organic pollutants
that can be easily dispersed, thus posing risks to human ...
Antiandrogênios em efluente hospitalar: extração com barras poliméricas, quantificação, identificação de metabólitos e subprodutos, proposição de rotas de degradação por processos avançados de oxidação
(Universidade Federal de Santa Maria, 2013-04-12)
In this work, methods were developed for the determination of antiandrogens in hospital
effluent using the analytical technique HPLC-DAD. Microextraction techniques of
Spironolactone, Flutamide, Cyproterone and Tamoxifen ...
Síntese, cristalografia e propriedades de ligantes triazenos mono e biscatenados e derivados complexos de Cu(II), Ni(II) e Pd(II)
(Universidade Federal de Santa Maria, 2013-04-30)
Triazenes are a class of compounds characterized by the presence of a diazoamino functional group (N=N N) showing remarkable ability to support the stereochemical requisites of a wide variety of metal transition complexes. ...
Síntese de derivados do estigmasterol e do ácido ursólico e avaliação de suas atividades biológicas
(Universidade Federal de Santa Maria, 2014-02-28)
The present work describes the synthesis of twenty-two new derivatives (4-25) from stigmasterol (1) and seven new derivatives (26-32) from ursolic acid (2) via esterification and coupling reactions with different amino ...
Síntese de 1,1,1-tricloro-4-metoxi-3-alquen-2-onas com cadeias graxas e suas derivatizações para isoxazóis e alcoxicarbonil-1H-pirazóis graxos
(Universidade Federal de Santa Maria, 2013-03-05)
This project presents the acylation methods of acetals applied for chemoseletive synthesis of greases 1,1,1-trichloro-4-methyl-3-alquen-2-ones derived from alkyl methyl ketones and dialkyl ketones, including those with ...
Emprego de oxigênio e peróxido de hidrogênio como auxiliares na decomposição de amostras biológicas por via úmida assistida por radiação micro-ondas
(Universidade Federal de Santa Maria, 2012-07-02)
In the present work it was investigated the possibility of using diluted HNO3 solutions for digestion of biological samples (milk powder and bovine liver) by microwave-assisted wet digestion. The possibility of use O2 and ...