Characterisation andin vivoevaluation ofAraucaria angustifoliapinhão seed coat nanosuspension as a functional food source

Abstract

Araucaria angustifolia seeds are culturally important from South America; however, the seed coat is generally discarded and have yet to find a beneficial commercial impact. We propose a new formulation...

Bioactivity screening of pinhão (Araucaria Angustifolia (Bertol.) Kuntze) seed extracts: the inhibition of cholinesterases and α-amylases, and cytotoxic and anti-inflammatory activities

“…The fasting blood glucose level and insulin level of the group treated with extract at 400 mg kg −1 were significantly decreased by 47.97% and 46.49%, respectively. Also, Lima et al 41 developed a nanosuspension of A. angustifolia seed coats, in which nanofibrils with antioxidant activity and high levels of phenols and sterols led to a decrease in cholesterol, triglyceride, and glucose levels and weight gain in rats when they were treated with a daily diet containing this nanosuspension.…”

Characterization of Gels and Films Produced from Pinhão Seed Coat Nanocellulose as a Potential Use for Wound Healing Dressings and Screening of Its Compounds towards Antitumour Effects

“…General characterization of pinhão seed coat was performed by the group previously, using the same concentration [ 30 ]. The film produced without PVA became brittle and the shape of the film lacked resistance, this is seen by the macroscopic photographic images of the samples ( Figure 2 c) to exemplify the brittleness of the film after handling it gently.…”

“…The film produced without PVA became brittle and the shape of the film lacked resistance, this is seen by the macroscopic photographic images of the samples ( Figure 2 c) to exemplify the brittleness of the film after handling it gently. When bleaching is previously performed on the husk, one obtains a bleached pulp of cellulose [ 30 ]. With such material, it is possible to make films with up to 5 GPa of elastic modulus, but as the idea of this work is to use the compounds found in the husk, therefore, no pre-treatment was carried out, so the film obtained from MFC’s unbleached husk was brittle.…”

Yerba Mate Extract in Microfibrillated Cellulose and Corn Starch Films as a Potential Wound Healing Bandage

“…This surface modification generates a greater contact area and binding with the microfibrils, leading to an increase in the resistance of the material [28]. These cellulose fibers are of nanometric size (0.1 and 100 nm) on which the stones from the mechanical defibrillation apparatus induce abrasive forces, obtaining a nanosuspension formulation with a gel-like characteristic [29]. Technical parameters are 1500 rpm rotation: 30 steps and 0.1 mm distance between stone disks.…”

“…Films with defibrillated cellulose from kraft pulp are known to be very resistant [10,29], and this can be improved if crosslinked with other materials-such as chitosan [49]-at the expense of becoming less flexible and more brittle. The mechanical defibrillation used in this work, also reported by other works to obtain nanofibrils [29,39], strongly affected the results of the tensile tests performed by DMA (Figure 2a). In the case of yerba mate, the film slightly increased its resistance, and blending during defibrillation resulted in it becoming more resistant compared with blending afterwards.…”