Abstract
The changes in moisture content, storage mycoflora and aflatoxin B1 (AFB1) in bran from untreated or raw rice (Rr) and parboiled rice (Pbr) stored in small lots in polyethylene bags were studied at 15-day intervals up to 60 days, using five lots of each type of bran. Deterioration was more rapid with reference to all the three parameters, in Rr bran compared to Pbr bran, the former becoming completely overgrown and caked with fungi by the end of 60 days.Aspergillus flavus was the dominant fungus in Pbr bran, whereasA. candidus andTrichoderma viride were abundant in Rr bran. The frequency of incidence as well as concentration of AFB1 increased with storage time in both types of bran, but the rate of increase as well as overall concentration were much higher in Rr bran. Thus raw rice bran is unsuitable for prolonged storage.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Abbreviations
- AFB1 :
-
aflatoxin B1
- MC:
-
moisture content
- Pbr:
-
parboiled rice
- Rr:
-
raw rice
References
Houston DF. Rice bran and polish. In: Houston DF (ed), Rice: Chemistry and Technology. St. Paul: MI: American Association of Cereal Chemists, 1972: 272–300.
Barber S. Rice bran as a potential source of food. Proceedings of the 5th International Congress of Food Science and Technology. Kyoto: Kodansha, 1979: 112–21.
Gajapathy MK, Kalyanasundaram I. Distribution of rice seed mycoflora within the grain, with special reference to storage fungi. Indian Phytopath 1986; 39: 288–92.
Jayaraman P, Kalyanasundaram I. Natural occurrence of toxigenic fungi and mycotoxins in rice bran. Mycopathologia 1990; 110: 81–85.
Coker RD, Jones BD, Nagler MJ and in part Gilman GA, Wallbridge AJ, Panigrahi S. Mycotoxin training manual. London: Tropical Development and Research Institute, 1984.
Johnson LF, Curl EA. Methods for research on the ecology of soil borne plant pathogens. Minneapolis: Burgess, 1972.
Raper KB, Fennell DI. The genusAspergillus. Baltimore: William & Wilkins, 1965.
Raper KB, Thom C, Fennell DI. A manual of thePenicillia. Baltimore: William & Wilkins, 1949.
Seitz LM, Mohr HE. Aflatoxin detection in corn: A simple screening test. Cereal Chem 1974; 51: 487–91.
Nabney J, Nesbitt BF. Spectrophotometric method for determining the aflatoxins. Analyst 1965; 90: 155–60.
Zar, JH. Biostatistical analysis. London: Prentice Hall, 1986.
Christensen CM, Kaufmann HH. Grain storage: The role of fungi in quality loss. Minneapolis: University of Minnesota Press, 1969.
Narahari Rao BS, Gopinath MV, Vasu B, Seetharam VC, Geetha, Sangameswaran SV. Rice bran and rice bran oil: An annotated bibliography. Mysore, India: National Information Centre for Food Science and Technology, CFTRI, 1983: 26–29.
Viraktamath CS, Desikachar HSR. Inactivation of lipase in rice bran in Indian rice mills. J Fd Sci Technol (India) 1971; 8: 70–74.
Chattopadhyay P, Srimani BN. Microbial degradation of rice bran in enhancing the free fatty acids in rice bran oil. J Fd Sci Technol (India) 1972: 9: 37–38.
Mahmoud SAZ, El-Hinnaway SI, Taha SM, Abd-El-Gawad MF. Stable vegetable oil emulsions for determination of lipolytic microorganisms in rice bran. Egyptian J Fd Sci 1974; 2: 155–64.
Kumaravel S, Singaravadivel K, Vasan BS, Anthoni Raj S. Storage of parboiled bran. J Oil Technol Ass (India) 1980; 12: 49.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Jayaraman, P., Kalyanasundaram, I. Changes in moisture content, mycoflora and aflatoxin content of rice bran during storage. Mycopathologia 126, 115–120 (1994). https://doi.org/10.1007/BF01146203
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01146203