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67 DAFTAR PUSTAKA Achermann, Yvonne., Ellie, J, C, G., Tom, C IR - PERPUSTAKAAN UNIVERSITAS AIRLANGGA DAFTAR PUSTAKA Achermann, Yvonne., Ellie, J, C, G., Tom, C., Mark, E, S., 2014.Propionib acterium acnes: from Commensal to Opportunistic BiofilmAssociated Implant Pathogen. Journal ASM.org, Vol. 27, No. 3, p. 419-440. Asshafa, Regia Nada., Tutiek Purwanti., Dewi Melani Hariyadi.2016.Effect of Combination Sodium Alginate-Gelatin 1% : 2% Content in Characteristic and Antimicrobial Activity of Probiotic Microsphere Lactobacillus acidophilus. ICMHS 2016. Azizpour, K. S., Bahrambeygi, S., Mahmoodpour, and A. Azizpour. 2009. History and Basic of Probiotics. Research Journal of Biological Sciences, Vol. 4, No. 4, p. 409-426. Bajpai, S.K and Narendra Kirar. 2016.Swelling and Drug Release Behavior of Calcium Alginate/Poly (Sodium Acrylate) Hydrogel Beads. Designed Monomers and Polymers Vol. 19 No.1 pg. 89-98. Bowe, WP., Logan, AC. 2011. 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