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.

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.

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.

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.

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In commercial bananas there is an increasing increase for seedlings of high genetic quality and free of pathogens; thus, the use of micropropagation has been increasingly encouraged for the production of seedlings. However, the success of establishing these seedlings in the environment depends on several factors, in which, the substrate has a relevant role. The objective of this study was to evaluate the growth of micropropagated banana seedlings under the influence of different formulations of substrates based on soil, bovine manure and vegetable ash for organic production system. The experiment was carried out on a certified rural property under an organic production system in the municipality of Palmácia (CE). The experimental design used was completely randomized, with four replications. The substrates were used in a ratio of 2:1, always two parts of soil for one of substrate, which was used: soil (ravine soil), organic compost (bovine manure + vegetal remains), bovine manure and vegetable ash (from sugar cane mill). The test was conducted in full sun and without the aid of irrigation, as the experiment coincided with the rainy season in the region. At 68 days after planting (DAP), growth analyzes were carried out: plant height, diameter of the pseudostem, number of leaves, length of roots, fresh and dry mass of aerial part and roots. The best substrates for the growth of micropropagated banana seedlings cv. Prata Catarina were mixtures of soil + organic compost and soil + manure.

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One of the strategies for the recovery of degraded soils is the planting of fast-growing forage species with high biomass production. In this sense, the objective of this research was to evaluate the initial growth of sorghum in degraded soils with organic fertilization and different phosphorus levels. A completely randomized design with a 4 x 3 x 2 factorial arrangement was used, with four soil types, three levels of phosphorus fertilization and two levels of organic fertilization. At 64 days after sowing the characteristics of the initial growth were analyzed: plant height, stem diameter, leaf number and fresh shoot mass. The height was measured by measuring the neck of the plant until the end of the newest fully expanded leaf, measured with the aid of a measuring tape and expressed in centimeters. The diameter of the stem, by means of a digital pachymeter. The application of phosphorus and organic matter in degraded soils is necessary for the initial development of sorghum plants, due to the low availability of this element, caused by the high adsorption of P in the soil colloids. Besides that, the lack of organic matter in the studied soils led to a decrease in the growth of sorghum, therefore, it is concluded that soil management in saline environments is necessary for the application of phosphorus and organic matter for a sustainable and technically viable production.