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| Bellini,Márcia Zilioli; Oliva-Neto,Pedro de; Moraes,Ângela Maria. |
| In this study, the effects of the origin of xanthan used, in combination with chitosan, to prepare films for the treatment of skin lesions were evaluated. The characteristics of the films obtained with xanthan commercially available for the food industry sector and xanthan originated from a fermentation process conducted in a pilot plant were compared. Results showed that the source did not strongly interfere in many of the properties of the films, such as the mechanical properties, cytotoxicity to L929 cells, absorption of simulated body fluid and culture medium, stability in water and saline solution. Hence, even though the properties of biopolymers of different sources might vary, the films prepared with two distinct types of xanthan gum could be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomaterials; Biopolymers; Films; Membranes; Properties and characterization; Biomedical applications. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200289 |
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| Lima,Isabela Angeli de; Pomin,Suelen Plaza; Cavalcanti,Osvaldo Albuquerque. |
| ABSTRACT Free films of pullulan-polymethacrylate associations were produced by casting process to develop a novel target-specific material. For characterization, tests of water vapor permeability, swelling index, infrared absorption spectroscopy, thermogravimetric analysis, scanning electron microscopy and mechanical analysis were performed. The polysaccharide concentration directly influenced vapor permeability and swelling, increasing the values of the latter up to five times when added in a proportion of 20% (per weight). The individual properties of each polymer were maintained, and chemical interactions were not detected. The films were found to be thermally stable and they had unaltered mechanical properties with the addition of the polysaccharide.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Films; Polymeric material; Modified release/enteric release/oral delivery/controlled release; Glucans; Eudragit; Physicochemical characterization. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000300601 |
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| Lameira,Rafaely das Chagas; Silva,Bárbara Marçon Pereira da; Valentini,Silvia Regina de Toledo; Cia,Patrícia; Bron,Ilana Urbano. |
| ABSTRACT: Despite the fact that cold storage and modified atmosphere techniques have already been studied for fresh cut Star fruit, little has been done considering the whole fruit. Besides that, each cultivar has its peculiarities, so the efficiency of combined postharvest treatments should be studied. The objective of this study was to evaluate the effect of polyvinyl chloride (PVC), 8.5 µm thick and low-density polyethylene (LDPE), 33 µm thick associated with cold storage (10 ± 1 °C and 5 ± 1 °C / 85 ± 5% RH) on the conservation of ‘Malasia’ Star fruit. Storage at 25 oC maintained Star fruit overall quality, regardless of the film type, up to four days. The weight loss was higher in fruit packed with PVC, but this fact was not noticed by the sensory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Averrhoa carambola L.; Films; Postharvest; Ripening.. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000500203 |
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