Browsing by Author "Obajemihi, O"
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Item Effects of different pasteurizers on the microbial quality of raw milk samples(National University of Food Technologies (NUFT), Ukraine., 2015) Sunmonu, MO; Obajemihi, O; Odewole, MM; Oyedun, AO; Bankole, HFThis study was conducted to determine the efect of different pasteurizing temperatures on the microbial quality of raw milk samples from different breeds. Materials and methods.The raw milk samples were analyzed chemically for pH in the range of 5.670 to 3.240 and microbiologically for Total Viable Counts, Coliform Counts, Fecal Coliform Counts, and Lactobacillus Counts, for all treatment combinations. These samples were pasteurized at pasteurized at 71◦C for 15 seconds, 66◦C for 15 minutes and 61◦C for 30minutes collected from White Fulani breed, New Jersey breed and the breed mixture (White Fulani and New Jersey) using pasteurizer made of aluminium, stainless steel and galvanized steel Results and discussion. Mean results of TVC, CC, FCC, LBC for White Fulani before pasteurizing were in the range of 6.833x105-0.000 Cfu/ml and FC (2.433 x 103Cfu/ml) respectively and that of New Jersey were within 7.800x105 - 0.000 Cfu/ml and FC (0.115 x 103Cfu/ml) respectively, also that of the breed mixture were within 9.400x105 -0.000 Cfu/ml and FC (5.167x105Cfu/ml). The mean counts was decreased for aluminium, stainless steel and galvanized steel pasteurizer at the temperature and microbial range of 61◦C-71◦C and for TVC(7.233-1.400 Cfu/ml), CC(5.633-0.000 Cfu/ml), FCC(3.033-0.000Cfu/ml), LBC (3.000-0.000Cfu/ml), FC (5.033-1.000Cfu/ml) for the White Fulani and was also decreased for the New Jersey at the same materials and temperature combinations for TVC(6.533-1.800 Cfu/ml), CC(4.800-1.233 Cfu/ml), FCC(0.000-0.000 Cfu/ml), LBC (1.800-0.000Cfu/ml), FC (3.833-1.033Cfu/ml). Finally, the microbial counts was also decreased for the breed mixture at the same materials and temperature combination for TVC(5.800-1.200 Cfu/ml), CC(4.300-1.000 Cfu/ml), FCC(0.000-0.000 Cfu/ml), LBC(1.033-0.000 Cfu/ml) and FC(3.300-1.200 Cfu/ml). Conclusion. Raw milk samples should be pasteurized at a temperature of 71oC in a stainless steel for 15 seconds in order to record a low bacterial counts.Item Effects of Storage Environment and Packaging Media on the Disease Incidence and Weight Loss of Stored African Star Apple (Chrysophyllum albidum)(Faculty of Engineering, University of Maiduguri, Nigeria., 2017) Sunmonu, MO; Odewole, MM; Obajemihi, O; Ajala, OEA study was conducted to study the effect of storage environment and packaging media on the disease incidence and weight loss of stored African Star Apple (Chrysophyllum albidum). Three storage environments were identified in this study namely- evaporative cooling basket, refrigerator and ambient storage and freshly harvested ripe African star apples were wrapped in perforated polythene, moist jute material and without packaging and stored under these three storage environment. The apples were observed for deteriorations mediated by microbial infection and insect infestation. Manifestation of infestation which affected the shelf-life of African Star Apple was delayed most in the refrigerator. The level of infestation of the apples stored in evaporative cooling basket was next to the refrigerator in the decreasing order. Weight losses were lower in apples wrapped with moist jute sack (0.48% ± 1.6) stored in refrigerator than those wrapped with perforated polythene (0.79% ± 1.2) and unwrapped (1.45% ±1.4). Similar wrapping effects were obtained in the evaporative cooling basket and ambient. Weight losses were lower in apples stored in refrigerator (0.91%) than in the evaporative cooling basket (2.84 %) and ambient shade (7.41 %).