Incorporating enzymes into calcium alginate beads is an effective method to immobilise them and preserve, at the same time, their catalytic activity. Sodium was mixed with Aspergillus ficuum tannase in aqueous solution, tannase-loaded were prepared using a simple droplet-based microfluidic system. Extensive experimental analysis carried out characterise samples. Microscopic imaging revealed morphological differences between surfaces of bare matrix beads. Thermal allowed assessing hydration...

The unbridled use of fossil fuels is a serious problem that has become increasingly evident over the years. As such contribute considerably to environmental pollution, there need find new, sustainable sources energy with low emissions greenhouse gases. Climate change poses substantial challenge for scientific community. Thus, renewable through technologies offer maximum efficiency minimal pollution and carbon major goal. Technology related hydrogen as fuel one most promising solutions future...

Cheese whey is a dairy industry by-product responsible for serious environmental problems. Its fermentation would allow reducing its impact and producing, at the same time, high-value products, hence ensuring cleaner production. Batch fermentations of cheese permeate, either as such or 1.5-fold twice-concentrated, by Kluyveromyces lactis CBS2359 were performed in flasks with without agitation to select best conditions produce simultaneously ethanol biomass high β-galactosidase activity. In...

The lipid, fatty acid, protein, and carbohydrate contents in cyanobacterial strains biomass can vary by orders of magnitude. Many publications (thousands peer-reviewed articles) require more work to extract their precise concentration values (i.e., different units, inaccurate data), which makes them not easily exploitable. For this purpose, tables have been compiled from the literature data, including lipids, acids, proteins, carbohydrates composition quantities cyanobacteria. A lot data...

Doxycycline is a broad-spectrum tetracycline occurring in domestic, industrial, and rural effluents, whose main drawback the increasing emergence of resistant bacteria. This antibiotic could be degraded by so-called Fenton process, consisting oxidation organic pollutants oxygen peroxide (H 2 O ) presence Fe 2+ . Experiments were performed according to an experimental Rotational Central Composite Design investigate influence temperature (0–40.0°C), H concentration (100–900 mg/L), (5–120 mg/L)...

For centuries, fossil fuels have been the primary energy source, but their unchecked use has led to significant environmental and economic challenges that now shape global landscape. The combustion of these releases greenhouse gases, which are critical contributors acceleration climate change, resulting in severe consequences for both environment human health. Therefore, this article examines potential hydrogen as a sustainable alternative source capable mitigating impacts. It explores...

Abstract One of the bottlenecks in pharmaceutical industry is drug production scale‐up, which can be performed by microreactor technology. Such an approach was applied to synthesis ( Z )‐5‐(4‐hydroxybenzylidene)thiazolidine‐2,4‐dione, a bioactive aromatic heterocyclic compound belonging class glitazones. n ‐Propanol best solvent and piperidine catalyst for batch reaction, completed only 5.5 h. In microreactor, productivity almost independent solvent. The behaved as plug‐flow reactor operated...

Tannase (tannin acyl hydrolase, E.C. 3.1.1.20) is an enzyme that catalyzes the hydrolysis of ester and depside linkages in hydrolysable tannins such as tannic acid, releasing gallic acid glucose. It has several commercial applications food industry, among which are production, reduction tannin content fruit juices, preparation instantaneous tea. In this study we immobilized Aspergillus ficuum tannase calcium alginate beads then used it to treat boldo (Peumus boldus) Such a technique allowed...

Biofuels are increasingly important renewable resources in the world’s energy matrix that have challenged scientific community as well small and large farmers to develop alternatives fossil fuels order achieve aims of transition. In particular, Brazil’s proven competitiveness agribusiness together with its rich biodiversity put country a key position biofuels market. The semiarid Caatinga northeastern Brazil, an exclusive biome many oilseed species suitable for potential purposes, is...

The freshwater microalga Chlorella vulgaris was cultured batchwise on the seawater-simulating Schlösser medium either in a 1.1-L-working volume helicoidal photobioreactor (HeP) or Erlenmeyer flask (EF) as control and continuously supplying air CO2 source. In these systems, maximum biomass concentration reached 1.65 ± 0.17 g L(-1) 1.25 0.06 , cell productivity 197.6 20.4 mg day(-1) 160.8 12.2 respectively. Compared to Bold's Basal medium, commonly employed cultivate this microorganism...

Tannase from Aspergillus ficuum was immobilized by two different techniques for comparison of kinetic and thermodynamic parameters. either entrapped in calcium alginate beads or covalently-immobilized onto magnetic diatomaceous earth nanoparticles. When on nanoparticles, tannase exhibited lower activation energy (15.1 kJ/mol) than when (31.3 kJ/mol). Surprisingly, the thermal treatment had a positive effect since enzyme became more solvent exposed due to matrix leaching. Accordingly,...

Abstract Microreactor technology can help to reduce the time market new drugs. It was applied produce ( Z )‐5‐benzylidenethiazolidine‐2,4‐dione, a heterocyclic intermediate in synthesis of various Ethanol optimum solvent and piperidine best catalyst batch process. The continuous/microreactor process exhibited much better performance than productivity, which strongly influenced by temperature, reached maximum at 160 °C using methanol as solvent. A kinetic/thermodynamic study indicated that...

Brazil is known for its great potential production of renewable resources such as agro-industrial residues. These residues can be used alternative sources new products. Meanwhile, solid-state fermentation, with advantages energy conservation and pollution reduction, has been identified a process the bioactive compounds, especially enzymes. In present work, 23 factorial design was to evaluate effects pH, temperature moisture on phytase xylanase by Lichtheimia blakesleeana URM 5604 through...

Abstract Enrofloxacin is a synthetic second‐generation fluoroquinolone used as an antimicrobial agent exclusively in veterinary medicine. To simulate the treatment of wastewater contaminated by enrofloxacin, four‐day long fed‐batch runs were carried out according to Fenton process with enrofloxacin solution model, which hydrogen peroxide and ferrous ion added twice day. The residual concentration was practically coincident that detected at end batch tests. Hydrogen almost completely consumed...

Cultivations of Arthrospira platensis were carried out to evaluate the CO2 capture capacity this cyanobacterium under bench-scale conditions. For purpose, influence light intensity on microbial growth and photosynthetic efficiency has been investigated in a helical photobioreactor. Five cultivations performed at different photon flux densities (23 ≤ PPFD 225 µmol photons m−2 s−1) by fed-batch pulse-feeding pure carbon dioxide from cylinder into helicoidal In particular, range (82–190 was...

Abstract To better understand the biological properties of cupuassu seed residue resulting from fruit industrial processing, its antioxidant activity was determined by both 2,2‐diphenyl‐1‐picrylhydrazyl and 2,2′‐azino‐bis(3‐ethylbenzothiazoline‐6‐sulfonic acid) assays. Molecular modeling used to correlate antiradical power eleven known phenolic compounds with their structures. The extract methods very high compared those similar residues. highest occupied lowest unoccupied molecular orbitals...

Abstract Optimal spray drying conditions were selected to microencapsulate red mombin juice and maximize carotenoid retention. Microencapsulation was optimized following a rotatable central composite design where inlet temperature, feed flow rate, maltodextrin concentration chosen as independent variables. The powder prepared under conditions, whose reconstituted nectar the most appreciated by sensory analysis, exhibited high total phenolic content...

O leite fermentado por Kefir é conhecido seu potencial como alimento funcional e produção de moléculas bioativas. Sendo assim, o objetivo deste trabalho foi estudar aatividade antioxidante dos peptídeos extraídos a qualidade microbiológica do ovelha Kefir.O produzido acordo depósito Patente BR 1020130158429. Aatividade realizada pelos métodos ABTS DPPH hidrossolúveis.A microbiota investigada pela contagem bactérias ácido-láticas leveduras.Os extratos peptídicos testados na concentração 6,25...