Species belonging to the Bauhinia genus, usually known as "pata-de-vaca", are popularly used to treat diabetes. Among them is Bauhinia ungulata var. obtusifolia (Ducke) Vaz, whose leaves are used, as a tea, for medicinal purposes in the Amazon region. The microencapsulation of the aqueous extract of its leaves, containing phenolic compounds, using five different wall materials (maltodextrin: DE11-14, and DE4-7; β-cyclodextrin; pectin, and sodium carboxymethylcellulose) is described in this paper. The microstructure, particle size, thermal behavior, yield, and encapsulation efficiency were investigated and compared using different techniques. Using high-performance liquid chromatography, phenolics, and flavonoids were detected and quantified in the microparticles. Microparticles, obtained with yield and phenolics encapsulation efficiency ranging between 60-83 % and 35-57 %, respectively, showed a particle size distribution between 1.15 and 5.54 µm, spherical morphology, and wrinkled surface. Among them, those prepared with sodium carboxymethylcellulose and pectin proved to be thermally the most stable. They had the highest flavonoid content (23.07 and 21.73 mgRUTE/g Extract) and total antioxidant activity by both the DPPH· (376.55 and 367.86 µmolTrolox/g Extract) and ABTS·+ (1085.72 and 1062.32 µmolTrolox/ g Extract) assays. The chromatographic analyses allowed for quantification, in the microparticles, chlorogenic acid (1.67-1.98 mg/g Extract), p-coumaric acid (0.06-0.08 mg/g Extract), rutin (11.1-12.9 mg/g Extract) and isoquercitrin (0.47-0.53 mg/g Extract), compounds considered responsible for the antidiabetic property attributed to the species.

Açai is a fruit common in the northern region of Brazil, and its consumption is primarily focused on culinary uses, resulting in the disposal of its seeds and contributing to environmental pollution. In this context, the objective of this study was to obtain, characterize, and perform a stability study of a toothpaste made from acai seeds as an organic abrasive for oral hygiene use. The depulped acai seeds were subjected to drying, grinding, and sieving to achieve the desired granulometry before being added to the other formulation components. Stability tests were conducted through cen-trifugation, density determination, acidity index, foam formation, FTIR, TG/DTG, rheological properties, and accelerated stability study. The formulation proved stable after the centrifugation test. The obtained density value was 1.36. The acidity value was 0.1720 mg/KOH, and the initial and final foam indices were 66.66%. TG/DTG analysis showed stability around 90°C. The acai tooth-paste exhibited pseudoplastic fluid behavior. The pH ranged from 6.5 to 8.08, and it showed good stability under the study conditions. Thus, the acai seed powder was found to be an acceptable organic abrasive for incorporation into toothpastes, and it demonstrated favorable characteristics for daily use in oral hygiene.