A5053613122- Petroleum Processing and Analysis
- Hydrocarbon exploration and reservoir analysis
- Mass Spectrometry Techniques and Applications
- Multicomponent Synthesis of Heterocycles
- Recycling and Waste Management Techniques
- Enhanced Oil Recovery Techniques
- Spectroscopy and Chemometric Analyses
- Bioactive Compounds and Antitumor Agents
- Material Properties and Processing
- Water Quality and Pollution Assessment
- Cultural Heritage Materials Analysis
- biodegradable polymer synthesis and properties
- Synthesis of Organic Compounds
- Conducting polymers and applications
- Synthesis and biological activity
- Forensic Fingerprint Detection Methods
- Plant Surface Properties and Treatments
- Pesticide Residue Analysis and Safety
- Extraction and Separation Processes
- Analytical chemistry methods development
- Environmental Chemistry and Analysis
- Pharmaceutical Quality and Counterfeiting
- Polymer composites and self-healing
Universidade Federal do Espírito Santo
2012-2023
In this work, electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI(±)-FT-ICR MS) was applied in the chemical characterization of polar compounds. These compounds were identified as oxygen-containing compound classes (naphthenic acids, O2 class, and phenols, O1 class), sulfur-containing (mainly sulfides, S1 basic non-basic nitrogen-containing (carbazoles pyridines, N class). For access employed methylation reactions. As increasing distillation cut...
Although the term "naphthenic acids" was originally used to describe acids that contain naphthenic rings, today this is in a more general sense and refers all components acid extractable fraction. In crude oil, exist as complex mixture of compounds with broad polydispersity respect both molecular weight structure. There has been increasing interest oil because corrosion problems cause during refining. Herein, two powerful analytical tools, negative-ion electrospray ionization Fourier...
O potencial da técnica de espectroscopia infravermelho com transformada Fourier e acessório reflexão total atenuada (FTIR-ATR) foi avaliado para o monitoramento degradação poliamida 11 (PA-11) usada em dutos flexíveis. As amostras foram submetidas a envelhecimento reatores pressão controlada atmosfera inerte. Os corpos prova imersos água deionizada (pH 7), nas temperaturas 110, 120 140 ºC por um período até 50 dias. A recomendada PA-11 é viscosimetria, através medidas viscosidade inerente...
The influence of temperature (110 and 120 °C) on the ageing piping made from polyamide 11 (PA‐11) containing 10–12% plasticizer was studied using deionized water (pH ≈ 7.0). A clean analytical methodology has been employed for quality control polymeric materials: energy‐dispersive X‐ray fluorescence spectrometry (ED‐XRF). It provides a fast suitable technique to characterize chemical elements because its multielemental capability, good sensitivity, high precision, short time, nondestructive...
The production of counterfeit drugs is a criminal problem that carries serious risks to public health worldwide. Herein, the chemical fingerprinting blister packaging using Fourier transform infrared spectroscopy (FTIR) authentic and samples Viagra® Cialis® demonstrated. Fifteen commercial (Viagra® Cialis®) thirty two (Viagra Cialis) were analyzed, FTIR data was subjected chemometric treatment via unsupervised pattern recognition methods (principal component analysis, hierarchical cluster...
transporte foram calculados.
This study described the morphology, crystallinity, thermal and mechanical characterization of Polyamide 11 (PA11) porous film prepared by non-solvent induced phase separation (NIPS) method using formic acid (FA) as solvent. In addition, miscibility PA11/FA/H2O system was performed to generate a ternary diagram. The films morphology investigated Scanning Electronic Microscopy (SEM) analysis, crystallinity X-Ray Diffractometer (XRD) Differential Calorimetry (DSC). A cellulosic reinforcement...
Abstract Improved reaction conditions are developed for the three component Mannich of lawsone (I) with aldehydes and amines to give new aminonaphthoquinones.
Dentre os desafios da extração e caracterização de ARN a partir sua matriz complexa, propomos o emprego uma nova metodologia análise para identificação dessas espécies em amostras petróleo. Tal metodologia, baseia-se numa abordagem não convencional utilização ESI(-)FT-ICR MS, através dopagem amostra com ácido fórmico transformação dos sais forma mono ou dicarregada. Por outro lado, aplicação bem-sucedida do FT-ICR MS petroleômica depende métodos processamento dados. No presente estudo foram...
STUDY OF LATENT FINGERPRINTS AND NEW DEVELOPERS BY PAPER SPRAY MASS SPECTROMETRY (PS-MS). In the criminal sphere, it is extremely important to identify perpetrators of crimes based on latent fingerprints (invisible naked eye) revealed at crime scenes and their corresponding objects. The present work aimed evaluate four synthetic analogues curcumin as possible IDL developers, compare results with those carbon black developer, well reach most adequate parameters in use LTQ FT-ICR mass...