Cinnamon is an evergreen tree belonging to the genus Cinnamomun; it is commonly founded in various tropical countries, consisting of more than 250 species of trees and shrubs in the Lauraceae family. This plant has had great medicinal importance in traditional medicine since ancient times. In this research, the chemical composition of the essential oil of Cinnamomum zeylanicum Nees was evaluated. The samples were extracted from the leaves and stem. The main components founded from the leaves were: Benzyl benzoate (74.2%), α-felandrene (6.9%), α-pinene (3.0%), and linalool (2.7%). Cinnamaldehyde (31%), linalool (13.3%), benzyl benzoate (11.3%), and cinnamaldehyde acetate (8.2%) stood out in the essential oil of the stem. The antioxidant activity was determined by the DPPH method, obtaining an inhibition percentage for concentrations of 80 g mL -1 , 59.17 ± 0.11% for the leaves and 61.34 ± 0.11% for the stem.

In this research, nine fruits cultivated in Northern Amazon were studied: Abiu, acerola, araçá, bacupari, biribá, camu-camu, fruta-do-conde, graviola and taperebá, with the objective of carrying out a proximate and nutritional study of the pulps of the Northern Amazon fruits. They were graviola (76.83 ± 0.02 Kcal 100 g-1), bacupari (53.15 ± 0.02 Kcal 100 g-1) and fruta-do-conde (46.66 ± 0.02 Kcal 100 g-1). Among the macronutrients, potassium with high concentration stood out, especially in graviola (541.16 ± 0.24 mg.100 g-1) and biribá (468.21 ± 0.13 mg 100 g-1). Among the micronutrients, iron concentrations was high in araçá pulp (3.04 ± 0.02 mg 100 g-1), and abiu was abundant in zinc (3.71 ± 0.02 mg 100 g-1) and manganese (6.61 ± 0.11 mg 100 g-1). The presence of cobalt at the level of traces in some of the pulps studied stood out. The Pearson correlation coefficient was evaluated, as well as the statistical treatment by multivariate analysis Principal Component Analysis (PCA) to establish the correlation between the variables studied.

The Patauá (Oenocarpus bataua Mart.) also known as Bataua or Patuá, is a palm native from the Amazon, consumed among the local populations as well as the wine obtained from its pulp with high energy value. It is a monocle palm tree reaching between 4-26 meters tall, distributed in the Amazon rainforest both in the wet forest of floodplains. The objective of this work was to study the proximal, mineralogical composition, as well as the total phenolic compounds and antioxidant activity of pulp and seed of Patauá. As for mineral composition, the high concentrations of sodium for the seed (84.21 mg 100 g-1) and pulp (71.21 mg 100 g-1), as well as magnesium values of 48.31 mg 100 g-1 for the seed and 41.23 mg 100 g-1 for the pulp. Among the micronutrients, the high concentration of iron in the pulp is 1.84 mg 100 g-1 for the pulps, and the manganese was 1.10 mg 100 g-1 for the seeds. The total phenolic compounds found in the seeds were relatively higher than for the pulps with values of 356.12 ± 0.12 mg GAEq g-1 and 321.03 ± 0.43 mg GAEq g-1, as well as the more significant antioxidant activity for the seeds than for the pulp. Carotenoids concentration in the seeds found of 2.52 ± 0.04 mg mL-1 and vitamin C concentrations were also quantified in trace concentrations, presenting the fruits of Patauá high biotechnological interest in the food and cosmetic industry.

The barks of fruits are usually discarded as organic waste; a valuable source of nutrients is obtained are used as a starting source in the preparation of functional foods. In this work, the physicochemical properties (pH, titrable acidity and soluble solids), mineral and bromatological analysis of nine Amazonian fruits were studied: abiu, acerola, araçá, bacupari, biribá, camu-camu, fruta-do-conde, araçá and taperebá. The most acidic values stand out for the different fruits, with the exception of the abiu bark (pH = 4.7). As for its nutritional contribution, it was the araçá barks that presented the highest energy value of 276.29 Kcal 100 g-1. Among the macrominerals, the potassium concentration stands out, being the highest concentration for the graviola bark, 521.04 mg 100 g-1 followed by magnesium, where the concentration in the biribá was 64.21 mg 100 g-1. On the other hand, the husks are rich in micronutrients, highlighting the concentration of zinc in the bark of araçá, 12.23 mg 100 g-1 and manganese in the bark of abiu, 6.84 mg 100 g-1. The Pearson correlation coefficient presented a highly significant correlation for Fe-Al (0.96), P-Fe (0.94) and Fe-Zn (0.89). O bligpot of principal components (PCA) explains 56% of the cases, being the minerals Mg, Na, Co, K, S and Ca highly associated for the graviola and bacuparí.