Microbiological Quality and Nutrient Composition of Dry Tomato

The weight of liver in tuna varies from 1.1 to 2.0% of total body weight. SOluble protein concentrate (SPC) from tuna liver was prepared using papain. SPC contained 10.8% total Nand 4.3% (alpha) - amino N. The results showed that the peptone, beef extract, yeast extract and glucose were well substituted by a single ingredient i.e. SPC at 2.5% level (medium 7) to get identical growth of sulphite reducing Clostridia (SRC), compared to the same in differential reinforced clostridial medium (DRCM) at 37°C. During the study on the quality of seawater and fresh water samples by most probable number (MPN) method, it was found that medium 7 with SPC and DRCM gave similar result.