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Síntese de 3-organocalcogenil-2-organo-cromenonas via reações de ciclização intramolecular mediada por selectfluor®
(Universidade Federal de Santa Maria, 2021-09-30)
This paper reports the development of an effective synthetic protocol between 1,3-
organo-propynones 1 and different diorganoyl dicalcogenides 2 mediated by Selectfluor® and
employing acetonitrile as a solvent, at room ...
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 ...
Determinação elementar e avaliação da geração química de vapor para determinação simultânea de As e Hg em suplementos alimentares por MIP OES
(Universidade Federal de Santa Maria, 2021-09-09)
In this work the suitability of microwave induced plasma optical emission spectrometry (MIP OES) for the determination of essential and non-essential elements in dietary supplements was evaluated. In this purpose, thirteen ...
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 ...
Perseguição e fuga em modelos presa-predador
(Universidade Federal de Santa Maria, 2010-03-04)
The main purpose of this dissertation is to propose and analyze the effects of pursuit and evasion on predator-prey spatiotemporal dynamics. We use a Coupled Map Lattices formulation in which a system of difference equations ...
Avaliação sobre a presença de hidrocarbonetos policíclicos aromáticos (HPAs) em formulações farmacêuticas injetáveis
(Universidade Federal de Santa Maria, 2009-09-10)
Polyciclic Aromatic Hydrocarbons (PHAs) are a family of compounds which contain two or more condensed aromatic rings. These substances, including the oxygenate and nitrogenate derivates, are widely spread in the
environment, ...
Análise pedológica em topossequência através da relação entre precipitação e a perda de sedimentos na encosta Itagiba, zona norte de Santa Maria - RS
(Universidade Federal de Santa Maria, 2010-03-26)
The occupancy in risk areas in Brazilian cities occurs mainly due to the processes of social inequality, bad management and absence of public planning. In Santa Maria, Rio Grande do Sul, it is not different, and there is ...
Um modelo de dramatização baseado em agentes cinematográficos autônomos para storytelling interativo
(Universidade Federal de Santa Maria, 2010-06-27)
Interactive storytelling systems are applications that aim to tell stories and allow the users to interact with the system in order to change the future story events. In respect to the visual representation of the stories, ...
Avaliação espaço-temporal das relações entre ecossistemas terrestre e aquático: estudo de caso da Bacia da UHE Passo Real da Região Sul do Brasil
(Universidade Federal de Santa Maria, 2009-12-16)
The UHE Passo Real reservoir, founded in 1973 (158,0 MW capacity), with a flooded area of 221 km2 (CEEE, 2008), presents different types of water and an intense agricultural exploitation in the uptake area. In this study, ...
Elaboração de zoneamento geoambiental para o perímetro urbano de Santa Maria - RS
(Universidade Federal de Santa Maria, 2009-09-29)
Human activities, in their diversity, it impact on the environment, causing profound changes in the natural landscape, which may reflect a framework of environmental degradation and loss of quality of life, especially in ...