The Amazon region’s rich biodiversity supports a bioindustry model that utilizes various biological assets from different plant species, and where it will add value to existing production chains, starting to supply bio industrialized products and not just primary products. Guarana (Paullinia cupana) is rich in bioactive compounds that interest the food and pharmaceutical industries. Thus, the main objective of this review is to present ways to add value to the guarana production chain by developing bioproducts using the residues generated in its processing. During processing, various residues are generated, as follows: peel (corresponding to 30% of the total mass of the fruit), and pulp (aryl), shell, and spent seeds, which have potential for application according to their characteristics. These residues were used to obtain bioactive compounds (catechins, theobromine, and caffeine) through different types of extraction (conventional, enzymatic, and pressurized liquid), and, subsequently, encapsulation. They were also applied in biodegradable and active packaging. Due to the high hemicellulose concentration, residual guarana seeds’ characteristics could potentially produce xylooligosaccharides (XOS). Therefore, the concept of biorefinery applied within the guarana production chain provides products that can be studied in the future to determine which processes are viable for expanding and valuing the productive chain of this fruit, in addition to strengthening sustainable development in the Amazon.

The Brazil nut production chain, which is reliant on Amazonian environmental conditions, is significantly affected by climate change, particularly extreme droughts, which decrease production and compromise sanitary quality. This study evaluated the influence of severe drought on aflatoxin concentrations and sequence toxigenic fungi in Brazil nuts harvested during the 2023 off-season. Aflatoxins were quantified using high-performance liquid chromatography, while fungal sequencing involved DNA extraction, PCR, and sequencing analysis. Findings indicated that all Brazil nut samples collected during extreme drought contained detectable aflatoxins, with 10% exceeding the legal threshold of 10 µg/kg. Phylogenetic analysis identified four isolates as Penicillium citrinum. Additional morphological and sequencing analyses identified Aspergillus species from the Circumdati and Flavi sections, although one isolate could not be taxonomically classified. These results demonstrate the aflatoxin production by fungi in Brazil nuts in an unprecedented way under drought conditions. Furthermore, the diversity of fungal species during drought underscores the risk of contamination, emphasizing the necessity for monitoring future harvests to improve management and ensure product safety.

O objetivo deste estudo foi avaliar os efeitos da inclusão do farelo de tucumã (FT) em dietas na fase inicial para frangos de corte de crescimento lento sobre o desempenho produtivo, rendimentos de carcaça e cortes, e composição centesimal do peito. Foram utilizados frangos de corte de crescimento lento da linhagem Label Rouge distribuídos com delineamento experimental inteiramente casualizado com quatro tratamentos, quatro repetições e 12 frangos por unidade experimental. Os tratamentos consistiram de uma dieta controle, sem a inclusão de FT nas dietas, e três níveis de inclusão de FT (5, 10 e 15%) nas dietas. Os frangos receberam as dietas experimentais de 1 a 28 dias de idade seguido de uma dieta basal no período de 29 a 56 dias de idade. Os resultados indicaram que a inclusão de 15% de FT nas dietas não afetou (p>0,05) o consumo de ração, porém, influenciou (p?0,05) no ganho de peso e conversão alimentar tanto na fase inicial quanto final de manejo dos frangos, indicando possível influência sobre o aproveitamento dos nutrientes da dieta. Apesar de redução linear no peso de abate e no percentual de nutrientes disponíveis na carcaça, a inclusão crescente de FT nas dietas proporcionou maior rendimento de carcaça (p?0,05) e das vísceras de maior interesse comercial (fígado, moela e coração) (p?0,05).

The rheological behavior of the juice extracted from sugary cassava roots, a type of cassava that stored the largest amount of sugars and the starch as it was, at various temperatures (9-65ºC) and in concentrations of 5ºBrix, 10.5ºBrix, and 18.5ºBrix. The experiments were performed on a Brookfield viscometer in a shear rate range of 0.01-237.6 s-1. The rheological models of Newton, Bingham, and Ostwald-De-Waele were fitted to the experimental results. The Newton model describes well the rheological behavior of the three samples evaluated. The effect of temperature on viscosity was evaluated using an Arrhenius equation; the viscosity value is influenced by the same temperature. The activation energy values ​​for the concentrations of 5ºBrix, 10.5ºBrix and 18.5ºBrix correspond to 3.14 kcal mol-1, 3.53 kcal mol-1 and 3.71 kcal mol-1. This type of cassava can be used in the production of ethanol, fermented beverages and syrups. It is also an important alternative for food production, as the cultivation of cassava can be classified as less aggressive to the environment, in comparison with sugarcane.