Irma Isnafia Arief

Physicochemical Properties, Fatty Acid Profiles, and Sensory Characteristics of Fermented Beef Sausage by Probiotics Lactobacillus plantarum IIA-2C12 or Lactobacillus acidophilus IIA-2B4

Probiotics may be used to enhance the functionality and nutritional values of fermented sausages. This study aims to evaluate the physicochemical and sensory properties of beef sausages fermented by lactic acid bacteria of Lactobacillus plantarum IIA-2C12 and L. acidophilus IIA-2B4. These strains were isolated from beef cattle and have shown to display probiotic features. While the nutrient contents were not affected by the probiotics, the pH, texture, and color varied among the sausages. Further analysis on fatty acids showed different profiles of saturated (C14:0, C17:0, and C20:0) and unsaturated (C14:1, C18:1n9c, C18:2n6c, and C22:6n3) fatty acids in sausages with probiotics. Gas chromatography-mass spectrometry further revealed some flavor development compounds including acid, alcohols, aldehydes, aromatic, ketones, sulfur, hydrocarbons and terpenes, varied among the sausages. Hedonic test showed no difference in the preference toward aroma, texture, and color for untrained panelists.

Kemampuan Yogurt Sinbiotik Berbasis Probiotik Lokal dalam Mencegah Diare dan Meningkatkan Imunitas Tikus Putih (Rattus norvegicus)

Tujuan penelitian ini adalah mengamati kemampuan yogurt sinbiotik yang mengandung probiotik lokal (Lactobacillus acidophilus 2B4) sebagai antidiare pada tikus yang terinfeksi Enteropathogenic Escherichia coli (EPEC), dan untuk mendeteksi dampak terhadap karakteristik imunomodulator (jumlah sel limfosit, kadar malonaldehid/MDA hati, dan aktivitas antioksidan superoksida dismutase/SOD hati). Infeksi EPEC (10 7 cfu/ml/hari) yang dilakukan secara oral ke tikus selama tujuh hari berturut-turut secara nyata menyebabkan diare ringan tanpa penurunan berat badan. Pemberian secara oral yogurt sinbiotik yang mengandung 10 9 cfu bakteri asam laktat/ml/hari selama 21 hari secara nyata meningkatkan respons imun tikus, yang ditunjukkan dengan meningkatnya sel limfosit di hari ke-14, penurunan MDA hati pada hari ke 14 dan 21, dan meningkatnya aktivitas SOD hati pada hari ke-14.