Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining
The production of microbial protein from agricultural and agroindustrial wastes is an important way to supply the demand of this essential nutritional principle. Sweet potato (Ipomea batata) tubercles damaged by weevil (Cylas formicarius) are considered a waste due to their unpleasant flavor. This r...
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Universidad de Oriente
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doaj-1db30eb2e0ab4553a1becf269cdfb22b2020-11-24T20:41:26ZspaUniversidad de OrienteTecnología Química2224-61852015-11-01333272282445Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein ObtainingLic. Antonio Montes-de-Oca-Olivares0Dra. C. Rosa C. Bermúdez1Dr. C. Manuel Serrat-Díaz2Centro de Estudios de Biotecnología Industrial (CEBI), Universidad de Oriente, Santiago de Cuba, CubaCentro de Estudios de Biotecnología Industrial (CEBI), Universidad de Oriente, Santiago de Cuba, CubaCentro de Estudios de Biotecnología Industrial (CEBI), Universidad de Oriente, Santiago de Cuba, CubaThe production of microbial protein from agricultural and agroindustrial wastes is an important way to supply the demand of this essential nutritional principle. Sweet potato (Ipomea batata) tubercles damaged by weevil (Cylas formicarius) are considered a waste due to their unpleasant flavor. This research deal in the characterization of sweet potato damaged by weevil, as an alternative substrate<br />for the culture of the fodder yeast Candida utilis. It was found that the damaged tubercle had a similar composition that the healthy one, concerning dry matter, total reducing sugars, nitrogen and minerals; the high content of reducing sugars (30-40 % dry weight) recommends the use of this waste as a substrate for single cell protein production. Several fungal strains were assayed to enzymatic degradation of sweet potato polysaccharides; from these ones, Aspergillus oryzae H/28-1 and Neurospora sp. were the more actives to release reducing sugars to the culture medium, being the last one the more prominent. The<br />yeast Candida utilis showed a satisfactory growth in media formulated in basis to weevil-damaged sweet potato, reaching reducing sugar consumptions over 80 % and biomass yields of 37-58 %; addition of urea as nitrogen source improved both parameters of the growth. The fermentation’s end-product acquired a pleasant flavor, which suggests a better palatability.http://revistas.uo.edu.cu/index.php/tq/article/view/411proteína microbiana, ipomea batata, boniato tetuanado, candida utilis, amilasas fúngicas. |
collection |
DOAJ |
language |
Spanish |
format |
Article |
sources |
DOAJ |
author |
Lic. Antonio Montes-de-Oca-Olivares Dra. C. Rosa C. Bermúdez Dr. C. Manuel Serrat-Díaz |
spellingShingle |
Lic. Antonio Montes-de-Oca-Olivares Dra. C. Rosa C. Bermúdez Dr. C. Manuel Serrat-Díaz Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining Tecnología Química proteína microbiana, ipomea batata, boniato tetuanado, candida utilis, amilasas fúngicas. |
author_facet |
Lic. Antonio Montes-de-Oca-Olivares Dra. C. Rosa C. Bermúdez Dr. C. Manuel Serrat-Díaz |
author_sort |
Lic. Antonio Montes-de-Oca-Olivares |
title |
Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining |
title_short |
Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining |
title_full |
Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining |
title_fullStr |
Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining |
title_full_unstemmed |
Evaluation of the Weevil-damaged Sweet Potato as Substrate for Microbial Protein Obtaining |
title_sort |
evaluation of the weevil-damaged sweet potato as substrate for microbial protein obtaining |
publisher |
Universidad de Oriente |
series |
Tecnología Química |
issn |
2224-6185 |
publishDate |
2015-11-01 |
description |
The production of microbial protein from agricultural and agroindustrial wastes is an important way to supply the demand of this essential nutritional principle. Sweet potato (Ipomea batata) tubercles damaged by weevil (Cylas formicarius) are considered a waste due to their unpleasant flavor. This research deal in the characterization of sweet potato damaged by weevil, as an alternative substrate<br />for the culture of the fodder yeast Candida utilis. It was found that the damaged tubercle had a similar composition that the healthy one, concerning dry matter, total reducing sugars, nitrogen and minerals; the high content of reducing sugars (30-40 % dry weight) recommends the use of this waste as a substrate for single cell protein production. Several fungal strains were assayed to enzymatic degradation of sweet potato polysaccharides; from these ones, Aspergillus oryzae H/28-1 and Neurospora sp. were the more actives to release reducing sugars to the culture medium, being the last one the more prominent. The<br />yeast Candida utilis showed a satisfactory growth in media formulated in basis to weevil-damaged sweet potato, reaching reducing sugar consumptions over 80 % and biomass yields of 37-58 %; addition of urea as nitrogen source improved both parameters of the growth. The fermentation’s end-product acquired a pleasant flavor, which suggests a better palatability. |
topic |
proteína microbiana, ipomea batata, boniato tetuanado, candida utilis, amilasas fúngicas. |
url |
http://revistas.uo.edu.cu/index.php/tq/article/view/411 |
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