Percorrer por autor "Yamashita, Fabio"
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- Araucaria angustifolia (Bertol.) Kuntze extract as a source of phenolic compounds in TPS/PBAT active filmsPublication . Silva, Tamires Barlati Vieira; Moreira, Thaysa Fernandes Moya; Oliveira, Anielle; Bilck, Ana Paula; Gonçalves, Odinei Hess; Ferreira, Isabel C.F.R.; Barros, Lillian; Barreiro, M.F.; Yamashita, Fabio; Shirai, Marianne Ayumi; Leimann, Fernanda VitóriaThere is growing interest in the development of biodegradable packaging materials containing natural antioxidant extracts. In this sense, the use of extracts obtained from agro-industrial byproducts has proved to be a sustainable alternative. In this study, Pinhão extract, a byproduct of Pinhão (Araucaria angustifolia (Bertol.) Kuntze) seed consumption, was characterized by HPLC-DAD-ESI/MSn, demonstrating the presence of eight phenolic compounds, (+)-catechin and (−)-epicatechin being the most abundant molecules. TPS/PBAT films containing Pinhão extract were produced by blown extrusion and their properties (tensile properties, thermal characteristics and microstructure) were evaluated in order to determine the effect of the presence of extracts. Results suggested that the interaction between the phenolic compounds of the extract and the polymeric matrix caused the reduction in the crystallinity degree, and an increase in the starch glass transition temperature. The presence of Araucaria angustifolia (Bertol.) Kuntze extract significantly (p < 0.05) affected the color and opacity of the film. Regarding water vapor permeation, no significant difference (p > 0.05) was detected. However, the water solubility and the contact angle with water (polar solvent) and diiodomethane (non-polar solvent) significantly changed due to the extract addition. Moreover, the Pinhão extract conferred significant antioxidant capacity to the TPS/PBAT films as determined by DPPH, suggesting that this material can be applied as an active packaging material.
- TPCS/PBAT blown extruded films added with curcumin as a technological approach for active packaging materialsPublication . Campos, Sabrina Silva; Oliveira, Anielle; Moreira, Thaysa Fernandes Moya; Silva, Tamires Barlati Vieira; Silva, Marcos Vieira da; Pinto, João A.; Bilck, Ana Paula; Gonçalves, Odinei Hess; Fernandes, Isabel P.; Barreiro, M.F.; Yamashita, Fabio; Valderrama, Patrícia; Shirai, Marianne Ayumi; Leimann, Fernanda VitóriaThe development of active packaging is a relevant topic demanding the development of films with diverse properties to preserve specific foodstuff. The objective of this work was to obtain extruded TPCS/PBAT films containing curcumin and evaluate it as an active antimicrobial and antioxidant packaging to protect chia oil from oxidative degradation. Morphology, thermal, mechanical, antimicrobial, and antioxidant evaluation of the films were conducted to determine whether the presence of curcumin affected the film’s properties. Infrared Spectroscopy indicated that curcumin addition affected the crosslinking reaction between citric acid and starch, which explains the changes in hydrophilicity and mechanical strength of the films. The incorporation of curcumin conferred antimicrobial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa and Escherichia coli) bacteria, as well as antioxidant activity. Films were tested as chia oil packaging, being verified that they successfully prevented oil degradation under accelerated stability test (60 °C for 7 days), demonstrating the feasibility of using TPCS/PBAT biodegradable films containing curcumin to obtain active packaging materials.
- Use of water-soluble curcumin in TPS/PBAT packaging material: interference on reactive extrusion and oxidative stability of chia oilPublication . Mücke, Naiara; Silva, Tamires Barlati Vieira; Oliveira, Anielle; Moreira, Thaysa Fernandes Moya; Venancio, Camila da Silva; Marques, Leila Larisa Medeiros; Valderrama, Patrícia; Gonçalves, Odinei Hess; Silva-Buzanello, Rosana; Yamashita, Fabio; Shirai, Marianne Ayumi; Genena, Aziza Kamal; Leimann, Fernanda VitóriaThe reactive extrusion technique is efficient in the incorporation of bioactive compounds for active packaging development. The application of curcumin, a strong antioxidant in its pure, isolated form to obtain active packaging has already been investigated; however, the use of water-soluble curcumin (WSC) in thermoplastic starch/poly(butylene adipate-co-terephthalate) (TPS/PBAT) films has not yet been investigated. It is important to determine how WSC would affect starch esterification reaction during reactive extrusion (REx). The use of WSC at 0.5%wt led to an increase in tensile strength, elongation at break, and Young’s modulus. A reduction in starch esterification was observed; however, an improvement in TPS/PBAT compatibility was detected by infrared spectroscopy, X-ray diffraction, and scanning electron microscopy images. It is worth noting that WSC addition resulted in an increase in the film’s solubility and water vapor permeability, due to the hydrophilic character of the WSC. The films were used to package chia oil, and the oxidative stability data were evaluated by UV-Vis spectroscopy coupled with principal component analysis. The addition of WSC (0.5%wt) in the films led to the improvement of the oil oxidative stability, suggesting that using water-soluble curcumin may be a promising alternative to active packaging in the case of reactive extruded films.