The present work aimed to evaluate the residue generated by the processing industry of acerola juice as a natural source of nutritional compounds and dietary antioxidant fiber. The determination of the dietary fiber, extraction and determination of phenolic compounds and antioxidants associated with dietary fiber in triplicates, expressed as mean values ± standard deviation, were performed. The pulp and refiner residues showed high contents of bioactive compounds and polyphenols, both presented high content of total dietary fiber, associated to the antioxidant activity. Ot is concluded that it is a material of high functional value and with beneficial health properties, being able to add value to products that have it as raw material.

Objetivou-se testar metodologias alternativas para caracterizar o volume sólido das pilhas de madeira bem como descrever o fator de empilhamento (Fe) para uma vegetação transicional de caatinga/cerrado. O estudo foi realizado em uma área experimental Fazenda Aracajú, Cristino Castro, Piauí. Os dados foram coletados em 11 pilhas de madeiras dispostas nas bordas de uma área com 30 por 90 metros. O Fe foi calculado pela razão entre o volume empilhado pelo volume sólido. Para testar a redução da amostragem, utilizou-se 7 tratamentos para comparação com o Fe, sendo: T1: face A e B e um diâmetro (horizontal); T2: face A e B e um diâmetro (vertical); T3: face A e diâmetros cruzados; T4: face B e diâmetros cruzados; T5: face A e um diâmetro; T6: face B e um diâmetro. As análises foram feitas em planilha eletrônica e o teste t pareado (95% de probabilidade de acerto) foi adotado para comparação dos tratamentos. O volume sólido médio foi de 1,57 m3 e o volume empilhado médio foi de 4,03 mst. O Fe foi de 2,55. O tratamento T6 obteve bom resultado, demonstrando a possibilidade da redução de amostragem medindo apenas uma face e um diâmetro nas pilhas.Palavras-chave: volume sólido, volume empilhado, pilhas de madeira.

A kinetic model was developed to represent the radical-scavenging capacity (RSC) for the oxidation of oils. The model was developed using second-order rate constants (k 2 ) to represent the RSC. The RSC of the oils can be compared by the k 2 values indicating their scavenging capacity. Furthermore, the k 2 values can be used to determine the decay kinetic of oils prone to attack by free radicals and to determine the amount of antiradicals that should be added as protective agent to these oils. As a case study, the antiradical capacity of four oils produced from tropical and subtropical fruits (avocado, nance, palm and peach palm) were studied using the DPPH• assay. Practical Application:Recently, the search for fruits with good sources of natural antioxidants, for example with high lipid contents, has stimulated studies that evaluate the antioxidant capacity of the extracted oils. Still, the scientific information on the functional potential of palm oils native to the Amazon is few, especially those that are used as sources of food in this region. Vegetable oils, especially native species from Brazil, may fill this gap, in addition to generating new alternatives of use, which will add value to these fruits, encouraging their consumption.

Given the increase in the production, commercialization andconsumption of fruit pulp in southwest Piauí state (PI), Brazil, research is needed to gain information on the composition of products already on the market. As such, this study aimed to assess the quality of fruit pulp based on standards established by current legislation. The pulps studied were acerola, cajá, cupuaçu, guava and passion fruit, which were thawed and homogenized. The samples were stored with three replications and the following assessed: total soluble solids (TSS), tritratable acidity (TA), pH and total vitamin C. The TSS (°Brix) and TA (% citric acid) values in acerola, cajá, cupuaçu, guava and passion fruit pulps were 5.20º and 1.02%, 3.20º and 0.86%, 13.24º and 2.42%, 4.80° and 0.64% and 6.20º and 2.41%, respectively. The pH values of acerola (3.00) and cupuaçu (3.02) pulps were in line with legislation (Ordinance 58, of August 30, 2016), whereas cajá (2.05), guava (2.72) and passion fruit (2.72) were below the established limit. With respect to vitamin C, acerola (1015.42 mg per 100 g), cajá (49.60 mg per 100 g), guava (29.0 mg per 100 g) and passion fruit (22.25 mg per 100 g) were in accordance with legislation, where as cupuaçu was below the legally stipulated content (11.68 mg per 100 g). All the pulps studied had at least one characteristic that did not meet the minimum legal requirement, which can be resolved by adopting good manufacturing practices that comply with legislation.

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The objective of this work was to identify and evaluate the bioactive compounds, as well as the antioxidant potential, present in mature fruits of cambuizeiro (Myrcia multiflora) from the Chapada do Araripe, Brazil.  In the fruits were evaluated: vitamin C, total anthocyanins, yellow flavonoids, total polyphenols, total antioxidant activity by the FRAP, DPPH and ABTS methods, and the antioxidant superoxide dismutase (SOD) and catalase (CAT) activity.  Cambui had an average vitamin C content of 56.40 mg/100 g, 2869.44 mg/100 g total anthocyanins 2858.50 mg/100 g yellow flavonoids and 1007.64 mg EAG/100 g of total polyphenols.  While the total antioxidant activity according to FRAP method was 123.94 μM ferrous sulphate/g, DPPH was 1805.66 g/g EC50, and ABTS was 32.62 μM trolox/g.  The enzymatic activity of SOD was 846,203 AU/g, while CAT did not read.  These results indicate that the mature fruits of cambuizeiro present high antioxidant potential, corroborating to the idea that their consumption may result in benefits to human health.