Juliana Machado Latorres

Estudos mostram que a remoção de parte da fibra presente na farinha de chia (FC) pode aumentar o percentual de proteínas por peso de farinha. Uma forma de realizar tal concentração é a operação de peneiramento. O objetivo do presente estudo foi comparar as propriedades funcionais da farinha de chia parcialmente desengordurada não peneirada (FNP) e da farinha de chia parcialmente desengordurada peneirada (FP35). Com base nos resultados, foi possível concluir que o peneiramento da FCPD, nas condições testadas, aumentou o percentual de proteínas em 37,2 % (de 23,94 % para 32,84 %) e reduziu 28,9 % o teor de fibras (de 30,79 % para 21,89 %). Como consequência após a operação de peneiramento a capacidade de retenção de óleo (CRO) e capacidade emulsificante (CE) da FCPD foram superiores.

The significant increase in the use of plastic packaging during the COVID-19 pandemic has significantly contributed to the generation of petroleum-derived plastic waste, which accumulates in land and marine environments and is responsible for serious environmental problems. Natural polymers incorporating active compounds represent the future of packaging systems. In this study, active and biodegradable films were produced using 6.5 and 7% (w/v) collagen, containing essential oils of cinnamon, litsea cubeba, and thyme at concentration of 0.25 and 0.5% (v/v). Active collagen films showed improved mechanical and barrier properties, with reduced water vapor permeability and solubility, compared to the standard film. FC7L50 (film with 7% collagen and 0.5% litsea cubeba essential oil) showed greater antibacterial activity against Staphylococcus aureus and Escherichia coli . FC65T25 (film with 6.5% collagen and 0.25% thyme essential oil) showed 79.12% ABTS· ⁺ radical inhibition. The maximum total biodegradation time in the soil and beach sand was 20 d for all films produced. The films that showed the greatest potential for active and biodegradable packaging were FC65T25 for antioxidant packaging and FC7L50 for antibacterial packaging. These results suggest that the elaborated films are promising candidates for active food-packaging applications.

Oral disintegration films (ODFs) offer a convenient alternative for administering active compounds with quick absorption, no need for water, customizable formulation, and promising pharmaceutical applications. This study aimed to develop chia mucilage films as a new polymer to carry vitamin C. Chia mucilage was extracted using the method of immersing the seeds in water, separated by vacuum filtration and using a sieve to remove the mucilaginous gel, then centrifuged and finally freeze-dried, with the mucilage obtained being used to produce films using the casting technique. The formulations included a control and a 1% vitamin C variant, with glycerol as a plasticizer. The produced films showed high solubility, pH close to the oral and a disintegration time of 53.17 s for the formulation with 1% vitamin C. The presence of vitamin C in the polymer matrix, as well as the interactions between them, were confirmed by DSC and FTIR spectra. On the first day of storage, after 1 min of reaction at 30 °C, the vitamin C concentration obtained was 477.50 mg/g, while at 40 °C was 411.28 mg/g. After 35 days of storage, the films showed a reduction in vitamin C concentration. Chia mucilage proved to be a promising polymer in the production of ODFs carrying vitamin C.

The beer processing industry generates large amounts of effluents rich in organic and inorganic material, and complex and expensive systems are commonly used for their treatment. Therefore, new alternatives capable of ensuring sustainable industrial growth through cost‐effective solutions are being studied. In this context, biosurfactants stand out due to their ability to degrade and remove contaminants from the environment. Therefore, the objective of this study was to evaluate the potential treatment of effluents from the beer industry using biosurfactants produced from wastewater from the beer industry. The biosurfactants were obtained by submerged cultivation at 30°C for 48 h using the bacterium Corynebacterium aquaticum in a mineral medium added of carbon source. The characterization of the biosurfactants was performed in relation to surface tension, emulsifying activity (EA), pH, and ionic character. The analyses were performed at 0, 24, and 48 h. The efficiency of the effluent treatments was evaluated by characterization in duplicate, before, during and after the treatment, regarding the concentrations of biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total solids (TS). The best biosurfactant results were obtained using C. aquaticum in a medium with 10% (v/v) of brewing industry wastewater (BIW) as a carbon source after 48 h of cultivation, reaching a surface tension of 35.1 ± 0.2 mN/m, EA of 40.9 ± 0.5%, and stability under extreme conditions of temperature (−20°C to 121°C), salt (1% to 10%), and pH (4 to 10). Thus, the biosurfactant was applied for 10 days in an aerated biological treatment system. Best results were observed in biosurfactant concentrations of 0.5 CMD (critical micellar dilution), reaching improvement of up to 55.9% for BOD, 23.8% for COD, and 50.6% for TS. Thus, the biosurfactant produced (10% BIW) shows potential as an accelerator in the brewing industry effluent (BIE) treatment process, without purification and sterilization of the biocompound. Therefore, brewery wastewater proved to be a sustainable and nutritional substrate to obtain biosurfactants.

Bioactive compounds derived from food or plants have become a natural source with the potential for producing functional, nutraceutical, and pharmaceutical foods due to their biological functions and beneficial health effects. However, to perform such physiological processes, these compounds need to be absorbed through the gastrointestinal tract. Among the existing technologies, nanoencapsulation increases physical stability, protection, and the contact surface, facilitating the solubility and bioavailability of such compounds. In this type of encapsulation, lipid nanocarriers are promising carriers due to their lipid structure and containing hydrophilic surfactant, capable of facilitating the intestinal absorption of active compounds. However, in food or drugs, one of the significant challenges for applying bioactive compounds on a nanoscale is the lack of in vivo studies that establish safety limits for cytotoxicity. This review covered recent studies on the encapsulation of natural bioactive compounds in different types of lipid nanocarriers. In addition to methods for obtaining and characterizing nanocarriers, bioactivities with beneficial potential for human health, such as antioxidant, antimicrobial, antihypertensive, antidiabetic, and neuroprotective, are mentioned. The manuscript deals with the bioaccessibility of active compounds, new perspectives, and challenges for applying lipid nanocarriers.

The aim of this study was to prepare active, biodegradable methylcellulose films and evaluate their properties after incorporating cinnamon (Cinnamomum cassia) and litsea cubeba (Litsea cubeba) essential oils. The properties of the methylcellulose films were modified with the addition of essential oils. The surfaces were smooth and homogeneous in all samples. The film with cinnamon oil showed higher antibacterial activity against Staphylococcus aureus and Escherichia coli and the film with litsea cubeba showed higher antioxidant activity against ABTS radical. The biodegradation time of the films in black sand and beach soil was 20 days. The films produced that presented the highest potential to become active packaging were the film with litsea cubabe oil as antioxidant packaging and the film with cinnamon oil as antibacterial packaging.

Several methods are used to recover compounds from these residues. Among them, ultrasound extraction has gained prominence due to its cellular disruption power. This work aimed to verify the action of ultrasound in increasing the yield of protein hydrolysate extraction from Pacific white shrimp (Litopenaeus vannamei) by-products. Proximal composition, hydrolysis degree, total content of carotenoids, and antioxidant activity (DPPH, ABTS, and reducing power) of the obtained hydrolysate was determined. The study found that the use of ultrasound concentrated more carotenoids, containing high antioxidant activity, increased the degree of hydrolysis, and accelerated the hydrolytic reaction rate.