Gherbawy Y A
Botany Dept. Faculty of Science, South Valley University, Quena, Egypt.
Int J Food Microbiol. 1998 Mar 3;40(1-2):127-31. doi: 10.1016/s0168-1605(98)00013-0.
Fungi occurring in Egyptian fruits in the City of Qena were studied. Results from the examination of 25 replicated samples of plums, pears and apples are reported. Examinations were carried out by direct plating after surface disinfection in a 0.5% (w/v) calcium hypochlorite solution on Czapek's-Dox agar. The dominant fungus found in the three types of fruit was Aspergillus niger, which was present in 88% of plum samples, 80% of pear samples and all of the apple samples. The lowest dose of gamma irradiation (1 MCi for 10 min) enhanced the three isolates of A. niger investigated to produce more biomass and polygalactronase, pectinmethylglacturonase, cellulase and protease. The higher doses (1 MCi for 20 and 30 min) were inhibitory to the growth of A. niger.
对埃及基纳市水果中出现的真菌进行了研究。报告了对25份李子、梨和苹果重复样本的检测结果。检测是在0.5%（w/v）次氯酸钙溶液中对水果表面进行消毒后，直接接种于查氏琼脂平板上进行的。在这三种水果中发现的主要真菌是黑曲霉，在88%的李子样本、80%的梨样本以及所有苹果样本中均有出现。最低剂量的γ射线辐照（1毫居里，照射10分钟）能促进所研究的三株黑曲霉产生更多的生物量以及多聚半乳糖醛酸酶、果胶甲基半乳糖醛酸酶、纤维素酶和蛋白酶。较高剂量（1毫居里，照射20分钟和30分钟）则对黑曲霉的生长有抑制作用。
