中文摘要：为了控制玉米豆类营养强化面粉中霉菌的生长，将发酵玉米、去皮豌豆及大豆种子65摄氏度干燥8h。磨碎的三种浓度的玉米木豆和玉米大豆粉与对照样品，在28 +/- 2 摄氏度和83 +/- 2%湿度的模拟热带条件下，用四种材料的包装袋：低密度聚乙烯、高密度聚乙烯、塑料（聚丙烯）及铝容器储存24周。定期评估产品的水活度(a(w))和真菌数。并表征和鉴定面粉中的优势霉菌菌株。研究表明，面粉中a(w)、真菌数及黄曲霉毒素水平都在承受范围内。该信息可能对制造商、监管部门及有兴趣寻求适合这类面粉的包装材料的研究人员有用。
外文摘要：In an attempt to control mold growth in maize-legume- fortified flours, fermented maize, blanched pigeon pea, and soybean seeds were dried at 65 degrees C for 8 h. The milled, maize-pigeon pea, and maize-soybean flour, in three concentrations and control samples, were stored in four packaging materials: low density polyethylene, high density polyethylene, plastic (polypropylene) and aluminum containers under simulated tropical conditions of 28 +/- 2 degrees C and 83 +/- 2% relative humidity for up to 24 weeks. The stored products were assessed periodically for water activity (a(w)) and fungal counts. Dominant mold isolates from the flours were further characterized and identified. Results demonstrated that the initial a(w) (0.15-0.17) increased to 0.17-0.24 after 24 weeks. Fungal counts ranged from 1.69 to 2.31 log(10) CFU/g initially to 2.6 to 3.79 log(10) CFU/g by the end of storage. The a(w) of maize-pigeon pea flour and maize-soybean flour, regardless of packaging, was not significantly different (p >= 0.05) over time; however, fungal counts were significantly different (p <= 0.05). Seven fungal species were identified from the flours: Cladosporium spp., Alternaria alternata, Paecilomyces variotii, Fusarium spp., Rhizopus spp., Scopulariopsis spp., and Epiccocum nigrum. Cladosporium cladosporioides was the dominant mold species in all the flours, with the highest in the maize-pigeon pea flours after 24 weeks of storage. Subsequent aflatoxin analyses indicated low levels (< 20 ppb) throughout the storage period, regardless of packaging material. This study demonstrates that a(w), fungal counts, and aflatoxin levels of the flours were within tolerable limits. The information from this study may be useful to processors, regulators, or researchers who are interested in identifying suitable packaging materials for these types of flours.
外文关键词：Maize-legume flours；Packaging materials；Storage；Molds；Mycotoxin
作者：Fasoyiro, SB；Gourama, H；Cutter, CN；AF Fasoyiro, Subuola B.；Gourama, Hassan；Cutter, Catherine N.
作者单位：Penn State Univ
期刊名称：EUROPEAN FOOD RESEARCH AND TECHNOLOGY
期刊影响因子：1.433
出版年份：2017
出版刊次：10
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