کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4493214 | 1623623 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Comparison of antifungal activities of scallop shell, oyster shell and their pyrolyzed products Comparison of antifungal activities of scallop shell, oyster shell and their pyrolyzed products](/preview/png/4493214.png)
Waste shells create several serious problems, however, only parts of them are being utilized now. Therefore, the ideal solution would be to convert the waste shells into a product that is both environmentally beneficial and economically viable. Scallop and oyster shells were exposed to heat treatment at 1050 °C. SEM and XRD analysis results showed that the resultant powder turned completely into CaO after the treatment. The antifungal activities of non-treated and heat-treated scallop and oyster shell powder slurry were investigated. Non- treated oyster shell powder exhibited a significant antifungal activity at 25,000 ppm. Its antifungal activities against Physalospora piricola Nose (P. piricola) and Rhizoctonia solani Kühn (R. solany) were even up to 100%. Moreover, increasing culture time did not alter the antifungal activities. Heat-treated scallop and oyster shell powder exhibited obvious antifungal activity at 500 ppm, at which concentration 100% inhibition of R. solany was observed. The possible antifungal mechanism of the oyster shell and its heat-treated counterpart was studied using R. solani Kuhn as model. The results illustrated that oyster shell is able to affect the membrane permeability of the fungus. The above-mentioned results showed that it is possible for oyster shell to be an agriculture fungicide.
Journal: The Egyptian Journal of Aquatic Research - Volume 39, Issue 2, 2013, Pages 83–90