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Paper Information

Journal:   JOURNAL OF MARINE SCIENCE AND TECHNOLOGY RESEARCH   SPRING 2009 , Volume 4 , Number 1; Page(s) 37 To 46.
 
Paper: 

BACTERIOLOGICAL AND CHEMICAL TVB-N IN (RUTILUS FRISII KUTUM) CHANGES IN TEMPERATURE 4°C AND -18°C

 
 
Author(s):  HOSSEINI HEDAYAT, SAFAEIAN SH., SADEGHI HOMA*
 
* FACULTY OF MARINE SCIENCE AND TECHNOLOGY, NORTH TEHRAN BRANCH, ISLAMIC AZAD UNIVERSITY
 
Abstract: 

In this research bacteriological and protein changes of (Rutilus frisii kutum) (kamensky) that caught from Caspian Sea and kept in two storage temperatures of (-18oC) and (4oC) were evaluated.
Samples were divided in2 studied groups, at first, 13 speci men of (Rutilus frisii kutum) were collected in coast of Noshahr. In the first group seven fish were stored at (4oC) and tested in: 1st, 3th, 6th, 9th, 12th, 15th, and 18th, days. In the second group we had six fish which stored in (-18oC) and tested in 1st, 3th, 45th, 90th, 135th, 180th days. In fish which stored at (4oC), the indicator of chemical spoilage (Total Volatile Base-Nitrogen) reached to maximum consumption limit 32mg/100gr and aerobic bacteria population in the 15th day passed from maximum limit (1/7×107 cfu/g), fishes whiches stored at (-18oC), 18th day, the indicator of chemical spoilage (TVB-N) reached to maximum consumption limit 30mg/100gr, but microbial population was in acceptable limit. It seems low temperature has direct influence to reduced rate of spoilage and also TVB-N which is the bass for the best indicator for quality control of fish in storage period rather than microbial indicators in cold and freezing Storage condition.

 
Keyword(s): TEMPERATURE, FREEZING, CHEMICAL, BACTERIOLOGICAL, (RUTILUS FRISII KUTUM)
 
References: 
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