EVALUATION OF CORNBRAN ('DUSA'), YAM AND BANANA PEELS AS POSSIBLE SUBSTRATES FOR AMYLASE PRODUCTION BY LOCAL STRAINS OF ASPERGILLUS NIGER CA-3 AND OR-5

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dc.contributor.authorADO, SALEH ALHAJI
dc.date.accessioned2014-02-07T11:01:56Z
dc.date.available2014-02-07T11:01:56Z
dc.date.issued1989
dc.descriptionA THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE DEPARTMENT OF MICROBIOLOGY FACULTY OF SCIENCE AHMADU BELLO UNIVERSITY ZARIA, NIGERIAen_US
dc.description.abstractA total of forty five strains of Aspergillus niger were isolated from various sources and screened for amylase producing ability using Nutrient agar containing soluble starch as the substrate. A. niger CA-3 and OR-5 were selected as the highest amylase producers. The two selected strains were studied further for amylase production in submerged cultures using corn bran ('Dusa'), yam and banana peels as the substrates with soluble starch as the control. When grown on soluble starch, the highest amylase activity for A. niger CA-3 was 24 units/ml while it was 27, 297 and 150 units/ml when grown on corn bran ('Dusa'), yam and banana peels respectively. Similarly, the highest amylase activities in the culture filterates of A. niger OR-5 grown on soluble starch, corn bran ('Dusa'), yam and banana peels were 36, 66, 222 and 144 units/ml respectively. The optimum concentration of yam peel powder for amylase production by A. niger CA-3 was 3.5% (w/v), while the optimum pH and temperature were 7.0 and 30°C respectively. It was concluded that yam peel was the best, and banana peel and corn bran ('Dusa') are also better substrates for amylase production by both strains than soluble starch.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/672
dc.language.isoenen_US
dc.subjectEVALUATIONen_US
dc.subjectCORNBRANen_US
dc.subject('DUSA')en_US
dc.subjectYAMen_US
dc.subjectBANANAen_US
dc.subjectPEELSen_US
dc.subjectPOSSIBLEen_US
dc.subjectSUBSTRATESen_US
dc.subjectAMYLASEen_US
dc.subjectPRODUCTIONen_US
dc.subjectLOCALen_US
dc.subjectSTRAINSen_US
dc.subjectASPERGILLUSen_US
dc.subjectNIGERen_US
dc.subjectCA-3en_US
dc.subject-5en_US
dc.titleEVALUATION OF CORNBRAN ('DUSA'), YAM AND BANANA PEELS AS POSSIBLE SUBSTRATES FOR AMYLASE PRODUCTION BY LOCAL STRAINS OF ASPERGILLUS NIGER CA-3 AND OR-5en_US
dc.typeThesisen_US
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