Venezuela, 20 de Noviembre de 2008

Año 2008, Volumen 58 - Número 1
Año 2008, Volumen 58
Número 1


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HOME > EDICIONES > Año 2002, Volumen 52 - Número 3

Trabajos de Investigación
Adaptabilidad de mazorcas de híbridos de maíz super dulce al procesamiento industrial. I congelación

Braunnier Alfonzo, Candelario Camacho, Ligia Ortiz de Bertorelli y Frank De Venanzi
Instituto de Química y Tecnología, Facultad de Agronomía, Universidad Central de Venezuela- Delmonte Andina CA, Turmero. Edo Aragua, Venezuela.

SUMMARY
Super sweet corn adaptability for industrial freezing process

With the purpose of evaluating adaptability to the freezing process of super sweet corn sh2 hybrids Krispy King, Victor and 324, 100 cobs of each type were frozen at -18°C. After 120 days of storage, their chemical, microbiological and sensorial characteristics were compared with a sweet corn su. Industrial quality of the process of freezing and length and number of rows in cobs were also determined. Results revealed yields above 60% in frozen corns. Length and number of rows in cobs were acceptable. Most of the chemical characteristics of super sweet hybrids were not different from the sweet corn assayed at the 5% significance level. Moisture content and soluble solids of hybrid Victor, as well as total sugars of hybrid 324 were statistically different. All sh2 corns had higher pH values. During freezing, soluble solids concentration, sugars and acids decreased whereas pH increased. Frozen cobs exhibited acceptable microbiological rank, with low activities of mesophiles and total coliforms, absence of psychrophiles and fecal coliforms, and an appreciable amount of molds. In conclusion, sh2 hybrids adapted with no problems to the freezing process, they had lower contents of soluble solids and higher contents of total sugars, which almost doubled the amount of su corn; flavor, texture, sweetness and appearance of kernels were also better. Hybrid Victor was preferred by the evaluating panel and had an outstanding performance due to its yield and sensorial characteristics.

Keys words: Corn sh2, freezing, characteristics.






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