The air yam (Dioscorea bulbifera) is an unconventional vegetable that produces a reserve stem, which has polysaccharides in its composition. These biopolymers, turn, have aroused industrial interest due to many of their properties and applications several areas, such as agro-food, chemical, pharmaceutical, textile, metallurgical, oil, among others. objective this work characterize the polysaccharide present raw pre-purified yams, well verify potential antioxidant capacity. FTIR analysis...

Exocellular (1→6)-β-d-glucan (lasiodiplodan) produced by the fungus Lasiodiplodia theobromae MMPI was derivatized carboxymethylation using different concentrations of a derivatizing agent. Lasiodiplodan in an attempt to increase its solubility and enhance biological activities. Carboxymethylglucans with degrees substitution (DS) 0.32, 0.47, 0.51, 0.58, 0.68 were characterized. FTIR analysis showed band strong intensity at 1600 cm-1 absorption 1421 cm-1, resulting from asymmetric symmetrical...

Abstract Gourmet vinegars are versatile culinary ingredients that have aroused the interest of consumers not only for their unusual taste, but also health benefits. In this work, blueberry and honey wine was first obtained using a bench-scale bioreactor. This had high concentrations phenolic compounds (706.18 mg GAE/mL) appreciable free radical scavenging ability against DPPH (161.42 µmol trolox equivalent/100 mL) ABTS•+ (356.41 mL), as well ferric-ion reducing antioxidant capacity (1419.86...

Aluminum oxide films containing small quantities of silver are produced by plasma electrolytic oxidation aluminum (97%) in different electrolytes aiming the synthesis bactericidal coatings over for food packaging applications. Sodium citrate, citric acid, and sodium silicate, Ag nanoparticles (Ag‐NPs) or + ions (AgNO 3 ) tested as electrolyte. The galvanostatic anodization curves used diagnostic to evaluate production Ag‐alumina a one‐step procedure. Citric acid silicate media provide more...

Syzygium malaccense belongs to the family Myrtaceae and it is popularly recognised as ‘jambo’ in Brazil. It poorly studied regarding bioactive compounds of fruits leaves. This study aimed at optimizing extraction characterization bioactives from S. Extraction was optimized using a 23 full factorial design evaluate effect ethanol concentration, time temperature on polyphenols antioxidants contents. Analyses phenolic content (Folin-Ciocalteau HPLC-DAD), vitro antioxidant capacities (DPPH, ABTS...

β-Glucans are biomacromolecules of industrial interest for its biological and technological properties, including ability to modify the rheology food systems different functionalities. In this study, lasiodiplodan an exocellular polysaccharide (1→6)-β-D-glucan type produced by fungus Lasiodiplodia theobromae MMPI was obtained in a bench-scale bioreactor operated discontinuous mode. Lasiodiplodan derivatized carboxymethylation characterized Fourier Transform Infrared spectroscopy (FT-IR),...

This is the first time that composition, antimicrobial potential and antioxidant ability of essential oil from leaves Baccharis oreophila are reported. Essential was obtained by hydrodistillation analyzed GC/MS. Antimicrobial evaluated diffusion disk broth microdilution methods. ABTS.+ , DPPH. FRAP methods were employed for activity evaluation. yield 0.47 %. Sixty-five compounds identified, representing 88.53 % total oil, which showed to be rich in oxygenated (37.88 %) hydrocarbons...

Current study evaluates ethanol and levan production using Zymomonas mobilis immobilized on alginate chitosan beads assesses the capacity of for reuse in sequential fermentations. Two experiments were carried out: In first experiment 2(5-2) design evaluated following independent variables: sucrose concentration; pH; incubation time; temperature agitation. second experiment, based best conditions observed 2(5-2), immobilization support subsequent fermentations was 12 days. fractionated...

β-Glucans are biomacromolecules well known, among other biological activities, for their immunomodulatory potential. Similarly, extracts of Baccharis dracunculifolia also possess properties and used in folk medicine the treatment inflammation, ulcers, hepatic diseases. Microparticles containing (1→6)-β-d-glucan (lasiodiplodan) B. extract were produced characterized. A 23 factorial design was employed to define conditions production microparticles by atomization. Lasiodiplodan associated with...

Blackberry vinegar was produced in successive acetification cycles and content of total phenolics, anthocyanins antioxidant activity were evaluated along the production. Firstly, blackberry wine obtained bench-scale bioreactor, being verified 0.39 g/g ethanol yield, 1.78 g/L.h volumetric productivity 76% efficiency. After, three conducted efficiently grapia barrel with average acetic acid production 51.6 g/L, 72.2 % yield 0.4 productivity. Appreciable contents polyphenolic compounds, high...

Sulfonated derivatives of lasiodiplodan (LAS-S) with different degrees substitution (1.61, 1.42, 1.02 and 0.15) were obtained characterized by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermal solubility analyses. Antimicrobial, antioxidant cytotoxic potential also assessed. The sulfonation was confirmed FTIR analysis specific bands at 1250 cm–1 (S=O, strong asymmetrical stretching vibration) 810 (C-O-S, symmetrical vibration associated the C-O-SO3...

Two experiments were carried out using loofa sponge and sugarcane bagasse as immobilization support. First a 2(5-2) design of was realized with the following independent variables: sucrose concentration; pH; incubation time agitation. Based on best results observed in this experiment, capacity for reuse supports subsequent fermentations evaluated 12 recycle days. Loofa support it showed 2.58 g.L-1 immobilized cells 19.13 exopolysaccharide levan. Sugarcane highest ethanol production (103.82...

Zymomonas mobilis was immobilized using a cell suspension fixed to 8.6 x 107 CFU mL-1 by spectrophotometry. This biomass suspended in sodium alginate solution (3%) that dropped with hypodermic syringe into 0.2 M calcium chloride solution. Was test two initial pH of fermentation medium (4 and 5) different sucrose concentrations 15, 20, 25, 30 35% at 30˚C, without stirring for 24, 48, 72 96 hours. The levan production 4 high 25% 24 (16.51 g L-1) 48 (15.31 best values obtained 5 during (22.39...

Modified titanium nanotubes (TiO 2 NTs) coatings are grown in simulated body fluid (SBF) from Ti cp and 6 Al 4 V. The addition of 1% v/v SBF to the electrolyte neither modifies film morphology nor structural oxide characteristics for both metal substrates. However, an improvement mechanical properties (hardness elasticity model) wettability is observed. From bioactive assay, a higher amount fluorapatite was detected on top TiO NTs prepared SBF‐based electrolyte.

Queijos frescos como o Minas frescal e a ricota são excelentes meios para proliferação de microbiota indesejável, prejudicando qualidade integridade destes produtos. Nesse contexto, este estudo objetivou avaliar evolução da contaminante em linha processamento queijos ricota, uma indústria laticínios localizada no município São José do Rio Preto-SP. As análises foram realizadas nas seguintes etapas: água, leite pasteurizado, coalho, massa, soro, superfície palmar dos manipuladores tanque...

Photocatalysis over TiO2 substrates is widely used in effluent treatment specially for organic compounds and inactivation of pathogenic microorganisms. In the present work, coatings were synthesized by plasma electrolytic oxidation (PEO) its bacteria inhibitory photoactivity was investigated. The photocatalytic activity investigated Staphylococcus aureus Salmonella bongori results correlated with pore diameter crystallite size. It observed that both morphology microstructure have an...

The objective of this study was to investigate the sulfonation (1→6)-β-D-glucan (lasiodiplodan) as a potentiating mechanism for biological functionalities.Lasiodiplodan sulfonated by chlorosulfonic acid-pyridine method.The modified exopolysaccharide characterized FT-IR and 13 C NMR spectroscopy, X-ray diffraction SEM.Antioxidant activity assessed methods H 2 O OH radical removal reducing power.Antimicrobial potential evaluated broth-microdilution method.Sulfonation resulted in derivative...