A5039840603- Biofuel production and bioconversion
- Enzyme Catalysis and Immobilization
- Microbial Metabolic Engineering and Bioproduction
- Spectroscopy and Chemometric Analyses
- Viral Infectious Diseases and Gene Expression in Insects
- Enzyme Production and Characterization
- Advanced Control Systems Optimization
- Sugarcane Cultivation and Processing
- Process Optimization and Integration
- Analytical Chemistry and Chromatography
- Fluid Dynamics and Mixing
- Natural Products and Biological Research
- Catalysis for Biomass Conversion
- Agricultural and Food Sciences
- Mineral Processing and Grinding
- Fault Detection and Control Systems
- Protein purification and stability
- Electrochemical sensors and biosensors
- Spectroscopy Techniques in Biomedical and Chemical Research
- Microbial Metabolites in Food Biotechnology
- Innovative Microfluidic and Catalytic Techniques Innovation
- Rural Development and Agriculture
- Biochemical and Molecular Research
- Glycosylation and Glycoproteins Research
- Crystallization and Solubility Studies
Universidade Federal de São Carlos
2016-2025
Universidade Federal do Rio de Janeiro
1998
In a carbon-neutral economy, biorefineries may replace oil refineries, providing materials and molecules. One of these products are biosurfactants (BSs), which can be produced from sugarcane bagasse. Two different processes for BS production were proposed evaluated technoeconomic environmental perspective. Global sensitivity uncertainty analyses (GSA UA) assessed the most influential variables uncertainties regarding minimum selling price (MBSSP), together with several metrics. Both...
In this study combined cross-linked aggregates of catalase from bovine liver and glucose-oxidase Aspergillus niger were prepared, the effects precipitant crosslinking agents, as well use serum albumin (BSA) a feeder protein, on enzyme immobilization yield thermal stability both enzymes, evaluated. Combi- (CLEAs) prepared using dimethoxyethane precipitant, 25 mM glutaraldehyde BSA/enzymes mass ratio 5.45 (w/w), exhibited highest activities stabilities at 40 °C, pH 6.0, 250 rpm for 5 h. The...
The development of rapid, accurate, and cost-effective technologies for process monitoring is highly desirable in the biofuels sector. Here, a technique based on combination Fourier transform mid-infrared (FT-MIR) spectroscopy partial least-squares (PLS) regression was evaluated as tool real-time bioethanol production from sucrose by Saccharomyces cerevisiae. Industrial musts composed juice molasses sugar cane sweet sorghum were used fermentations. Considering chemical complexity substrates,...
One of the main challenges second generation (2G) ethanol production is high quantities phenolic compounds and furan derivatives generated in pretreatment lignocellulosic biomass, which inhibit enzymatic hydrolysis fermentation steps. Fast monitoring these inhibitory could provide better control pretreatment, hydrolysis, processes by enabling implementation strategic process actions. We investigated feasibility ultraviolet-visible (UV-Vis) spectroscopy associated with partial least squares...
Abstract The solid–liquid equilibrium of precursors and products the enzymatic synthesis ampicillin (AMP) [6‐aminopencillanic acid (6‐APA) D(−)phenylglycine (PG)] was investigated at different temperatures (283–298 K) pHs (5.5–7.5). Solubility data were obtained using an analytical methodology. Equilibrium dissociation constants experimentally measured several for AMP, 6‐APA, PG, methyl ester. A model based on simplified perturbed hard sphere theory proposed by Khoshkbarchi Vera (Ind Eng...
Abstract BACKGROUND Determination of the volumetric oxygen transfer coefficient ( k L a ) is very important for bioreactor design and process analysis. Among all methods available, gassing‐out technique one simplest most widely used this task. However, method sensitive to probe dynamics (due delay effects), which can lead inaccuracy in determination. This especially pronounced airlift bioreactors, where circulation time affects initial assay (a transient effect). In present work, new...
Fourier transform mid-infrared (FT-MIR) spectroscopy is a fast, accurate, and practical technique for the quantitative analysis of compounds during ethanol fermentation. However, it very temperature sensitive. This study aimed to develop methodology real-time monitoring fed-batch fermentations, taking into account thermal fluctuations in industrial process (in range 30–35 °C). The use FT-MIR combined with partial least squares (PLS) regression was evaluated as tool quantify sucrose, glucose,...