Publications by authors named "Amanda Maria Claro"
Bacterial cellulose nanocrystals obtained through enzymatic and acidic routes: A comparative study of their main properties and in vitro biological responses.
Carbohydr Res
May 2024
Article Synopsis
- Cellulose nanocrystals (CNCs) are tiny structures derived from plant fibers, used in various fields like reinforcement materials and biosensors, and this study focuses on CNCs extracted from bacterial nanocellulose (BNC) using two methods: acidic hydrolysis and enzymatic hydrolysis.
- The CNCs produced from acid hydrolysis are needle-shaped and negatively charged, while those from the enzymatic method are spherical and positively charged, showing differences in size and stability characteristics.
- This research is significant as it successfully produces spherical nanoparticles for the first time via enzymatic treatment of BNC, and it also confirms that both types of CNCs are safe for use based on cell line tests.
As the development of nanotechnology progresses, organic electronics have gained momentum in recent years, and the production and rapid development of electronic devices based on organic semiconductors, such as organic light-emitting diodes (OLEDs), organic photovoltaic cells (OPVs), and organic field effect transistors (OFETs), among others, have excelled. Their uses extend to the fabrication of intelligent screens for televisions and portable devices, due to their flexibility and versatility. Lately, great efforts have been reported in the literature to use them in the biomedical field, such as in photodynamic therapy.
View Article and Find Full Text PDFThe reuse of açaí seeds is an organic approach for valorizing biomass, encouraging the public policies of circular economy, which reduces the human impact on the production chain processes. This research proposes an alternative for açaí seed as a filler in castor oil-based polyurethane, obtaining eco-sorbent to evaluate the sorption capacity for another impactful food industry by-product: waste cooking oil (WCO). Eco-sorbents were obtained with castor oil based-polyol and isocyanate (MDI) by mass mixing equal to 1:1 (OH:NCO), reinforced with açaí seed residue (5-20 wt%).
View Article and Find Full Text PDFAntibacterial activities and antiproliferative assays over a tumor cells panel of a silver complex with 4-aminobenzoic acid: Studies in vitro of sustained release using bacterial cellulose membranes as support.
J Inorg Biochem
November 2020
The aims of this work were to evaluate the antibacterial and antiproliferative potential in vitro of the metal complex with 4-aminobenzoic acid (Ag-pABA) and a drug delivery system based on bacterial cellulose (BC-Ag-pABA). The Ag-pABA complex was characterized by elemental analysis, high resolution mass spectrometry and single-crystal X-ray diffraction techniques, which indicated a 1:2 metal/pABA composition plus a nitrate ion coordinated to silver by the oxygen atom, with the coordination formula [Ag (CHNO)(NO)]. The coordination of pABA to the silver ion occurred by the nitrogen atom.
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