RESUMO
Ripe fruits of Barbados cherry Malpighia glabra L. proceeding from the fruit-growing section of Iguatemi Experimental Farm of Universidade Estadual de Maringa (PR), were triturated in a liquefier and hulled in a stainless steel sieve with 25 mesh. The bagasse (seeds and hull) was discarded and the vitamin C content was immediately determined, which was 1.79 g by 100 g of pulp. After that, the integral pulp was packed in glass flasks and submitted to the exhaustion and pasteurization processes and then hermetically closed. After the heat treatment the vitamin C content was 1.54 g by 100 g of pulp. The sealed flasks of Barbados cherry pulp, with and without the aluminum foil protection, were stored for 40 days. The first portion was kept at room temperature, the second in a refrigerator (1 degree C), and the third in a freezer (-18 degrees C). The vitamin C content analysis were realized on the 5th, 10th, 15th, 20th, 30th and 40th day. For the flasks stored without the aluminum foil protection, there was a loss of 22.08%, 7.79% and 1.30% and with aluminum foil the loss was of 10.40%, 3.90% and 1.30% for the storage at room, refrigeration and freezing temperatures, respectively. The results show that freezing method is the best form of vitamin C preservation.
Assuntos
Ácido Ascórbico/análise , Conservação de Alimentos , Frutas , Congelamento , Refrigeração , TemperaturaRESUMO
The acerola Malpighia glabra L., originally from the Antillas and North of South America, known by the people as cereja-das-antilhas or cereja-do-pará distinguish itself by its high content of vitamin C. The ripe and fresh acerola fruits utilized in experiments, were obtained from farmers of Maringá region, Paraná State, Brazil. The fruits were hulled in steel sieve with 25 mesh and the bagasse (seeds and hull) discarded. These physico-chemical analysis were realized in the pulp: vitamin C, moisture, protein, carbohydrate, fiber, lipids and fatty acids composition. We also determined the content of ash and cadmium, calcium, lead, copper, chrome, iron, magnesium, manganese, potassium, sodium and zinc minerals. The average content of vitamin C was 1.79 g/100 g of pulp, it was higher than the one for other fruits, like pineapple, araçá, cashew, guava, kiwi, orange, lemon, and strawberry and lower than the camu-camu sylvestral fruit of Amazônia. The contents of moisture, carbohydrate, fiber, lipids and minerals in the acerola were not significantly different when compared to other fruits.