A5019716294- Synthesis and Reactions of Organic Compounds
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Fluorine in Organic Chemistry
- Synthesis and Biological Evaluation
- Synthesis and Reactivity of Heterocycles
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Biodiesel Production and Applications
- Synthesis and Characterization of Heterocyclic Compounds
- Synthesis of Organic Compounds
- Pain Mechanisms and Treatments
- Synthesis of heterocyclic compounds
- Spectroscopy and Chemometric Analyses
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthesis and Catalytic Reactions
- Catalysis for Biomass Conversion
- Biofuel production and bioconversion
- Quinazolinone synthesis and applications
- Isotope Analysis in Ecology
- Meat and Animal Product Quality
- Agricultural and Food Sciences
- Sulfur-Based Synthesis Techniques
- Thermochemical Biomass Conversion Processes
Pontifícia Universidade Católica do Rio Grande do Sul
2010-2022
Universidade Federal do Rio Grande do Sul
2021-2022
Universidade Federal de Santa Maria
1999-2009
The use of renewable sources for obtainment chemicals, biofuels, materials and energy has become each time larger due to environmental, political economical problems non-renewable energies utilization. Among several products that can be obtained from lignocellulosic biomass, which is a source, there furfural, chemical many other value added obtained. main route furfural production consists an acid hydrolysis hemicelluloses present in biomass obtain xylose, goes through dehydration reaction...
A series of chalcogeno esters 1a, 6a and 6b have been synthesized in a straightforward manner. Polarized-light optical microscopy (POM) differential scanning calorimetry (DSC) showed that these displayed wide nematic range mesophase. In addition, UV-Vis solution (ca.10-5 mol L-1) was applied order to obtain the HOMO-LUMO gap for further comparison with theoretical results. The calculated values are excellent agreement experimental results, where electronegativity heteroatom (O, S Se) seems...
The present study investigates the antinociceptive effect of pyrazolyl-thiazole derivative 2-(5-trichloromethyl-5-hydroxy-3-phenyl-4,5-dihydro-1 H-pyrazol-1-yl)-4-(4-bromophenyl)-5-methylthiazole (B50) in mice. Male albino Swiss mice (30-40 g) were used acetic acid-induced abdominal writhes and tail-immersion tests. B50 caused dose-dependent antinociception (8, 23 80 µmol/kg, sc) acid writhing assay (number writhes: vehicle: 27.69 ± 6.15; (8 µmol/kg): 16.92 3.84; (23 13.85 (80 9.54 3.08;...
A new series of 4-dimethylsulfoximide-1,1,1-trifluoro-3-buten-2-ones has been prepared by the direct reaction 4-alkoxy-4-alkyl-(aryl)-1,1,1-trifluoro-3-buten-2-ones with S,S-dimethylsulfoximide, in good yields. The 5-trifluoromethylated 3-alkyl- and 3-aryl-1-methyl-1,2-thiazine 1-oxide derivatives intramolecular cyclization reactions have easily isolated.
Pain is the most common complaint in medical field and identification of compounds that can effectively treat painful states without induction side-effects remains a major challenge biomedical research. The aim present study was to investigate antinociceptive effect novel compound, 3-(4-fluorophenyl)-5-trifluoromethyl-1H-1-tosylpyrazole (compound A) several models pain mice compare with those produced by known trifluoromethyl-containing pyrazole compound celecoxib. Compound A or celecoxib...
Growing concern about replacing fossil fuels with renewable energy sources, coupled society’s concerns environmental preservation, are the main reasons why governments have sought strategies for increased production and consumption of sustainable fuels. Radish (Raphanus sativus L.) belongs to group oilseeds Brassicaceae family, being widely cultivated in south central-west regions Brazil, physical chemical characteristics propitious biofuels. In this context, objective present work was...
In this work, a multivariate approach was used to classify diesel/biodiesel fuel blends among 0% 100% of biodiesel content on mixture through discriminant analysis and cluster associated with Fourier transform infrared spectroscopy (FTIR). The statistical techniques in work were partial least squares (PLS-DA), principal component (PCA), soft independent modeling class analogy (SIMCA), hierarchical clustering (HCA), support vector machine (SVM). Multivariate performed the following oil...
ABSTRACT: Much research has been published regarding the relation between major gas hydrate accumulations and global carbon cycle. In this context, determination of sulfate/methane interface (SMI) depth is primary importance in order to understand dynamics methane flux shallow section. This paper identifies SMI sediments based on sulfate concentration profiles cores recovered Rio Grande Cone Gas Hydrate Province, Pelotas Basin, southern Brazil. The shape can be linked local rate as follows:...
Abstract Shale gas/oil currently are two of the most important unconventional energy resources. Their exploitation has caused an revolution in USA, and many countries investing it. Brazil large areas covered with sedimentary basins, but little attention been devoted to study shale containing oil gas. The parameters analyzed studied for geochemical data evaluation are: clay mineral identification, matter analysis, elemental analysis (including total organic carbon, H, N, S), methane...
BIORREMEDIATION OF INDUSTRIAL EFFLUENT USING MICROALGAE.National industrial effluent remediation strategies are largely outdated, which makes these processes costly and at the same time inefficient.Among most worrying compounds heavy metals, have bioaccumulative toxic characteristics to living beings.In addition these, high nutrient loads constitute a huge environmental problem, since devastation promoted by eutrophic niches is capable of disrupting complex food chains.This paper presents...
Carbon dioxide capture, storage, and transport technology based on the formation of gas hydrate is an innovative solution. In this work, experimental investigations CO2 hydrates were carried out with aqueous solutions containing 0.5% by weight three different organic salts synthesized from l-phenylalanine alcohols under isochoric conditions. All compounds obtained good yields (74.2–87.7%), among them, nonyl hydrochloride unprecedented compound. addition, there has not been any study aiming...
Abstract magnified image The synthesis of a novel series the intermediates N 2 ( 3 )‐[1‐alkyl(aryl/heteroaryl)‐3‐oxo‐4,4,4‐trifluoroalk‐1‐en‐1‐yl]‐2‐aminopyridines [F CC(O)CHCR 1 (2NHC 5 H N)] and 2,3‐diaminopyridines (2‐NH ‐3‐NHC N)], where R = H, Me, C 6 , 4‐FC 4 4‐CIC 4‐BrC 4‐CH 4‐OCH 4,4′‐biphenyl, 1‐naphthyl, 2‐thienyl, 2‐furyl, is reported. corresponding 2‐aryl(heteroaryl)‐4‐trifluoromethyl‐3 ‐pyrido[2,3‐ b ][1,4]diazepin‐4‐ols obtained from intramolecular cyclization reaction...
A simple and convenient one-pot procedure for the synthesis of 5- 6-substituted 2-phenyl-3H-pyrimidin-4-ones by condensation 4-alkoxy-1,1,1-trichloroalk-3-en-2-ones with benzamidine hydrochloride is described.