Properties of Polyglutamic Acid Produced by Bacillus subtilis ATCC 6633 in Rehydrated Whey Powder Supplemented with Different Carbon Sources

Çağrı Mehmetoğlu, Arzu

dc.contributor.authors	Cagri-Mehmetoglu, A; van de Venter, M;
dc.date.accessioned	2020-03-06T08:32:48Z
dc.date.available	2020-03-06T08:32:48Z
dc.date.issued	2015
dc.identifier.citation	Cagri-Mehmetoglu, A; van de Venter, M; (2015). Properties of Polyglutamic Acid Produced by Bacillus subtilis ATCC 6633 in Rehydrated Whey Powder Supplemented with Different Carbon Sources. POLYMER-KOREA, 39, 808-801
dc.identifier.issn	0379-153X
dc.identifier.uri	https://doi.org/10.7317/pk.2015.39.5.801
dc.identifier.uri	https://hdl.handle.net/20.500.12619/67397
dc.description.abstract	In this study, the use of rehydrated whey powder (RWP) solutions containing different carbon sources (citric acid, ammonium sulfate, or glutamic acid) for gamma-poly(glutamic acid) (gamma-PGA) by Bacillus subtilis ATCC 6633 was explored. After 72 h of fermentation at 30 degrees C, cell growth, gamma-PGA production, molecular weight by SDS-PAGE, rheological properties and NMR analysis of gamma-PGA were determined. The growth of B. subtilis was significantly different during 72 h of fermentation in RWP, medium E, and RWP containing citric acid or glutamic acid. These results showed the dynamic viscosity of the 1% polymer solution was 2.5 Pa-s at 10 1/sec shear rate. The maximum gamma-PGA concentration was 1.57 g/100 mL in RWP containing glutamic acid, citric acid and ammonium sulfate. Therefore, RWP as a waste product with being efficient and more economic fermentation medium to produce gamma-PGA can be ideal for the industrial production.
dc.language	English
dc.publisher	POLYMER SOC KOREA
dc.subject	Polymer Science
dc.title	Properties of Polyglutamic Acid Produced by Bacillus subtilis ATCC 6633 in Rehydrated Whey Powder Supplemented with Different Carbon Sources
dc.type	Article
dc.identifier.volume	39
dc.identifier.startpage	801
dc.identifier.endpage	808
dc.contributor.department	Sakarya Üniversitesi/Mühendislik Fakültesi/Gıda Mühendisliği Bölümü
dc.contributor.saüauthor	Çağrı Mehmetoğlu, Arzu
dc.relation.journal	POLYMER-KOREA
dc.identifier.wos	WOS:000362799400016
dc.identifier.doi	10.7317/pk.2015.39.5.801
dc.contributor.author	Çağrı Mehmetoğlu, Arzu