تأثير المحاليل الملحية و النواتج الأيضية لبكتريا حامض اللاكتيك على الصفات الكيميائية Scomberides و الضلعة Eipiniphilus coioides لشرائح أسماك الهامور المحفوظة بالتجميد commersonianus

الملخص EN

The study aimed to evaluate the influence of added sodium chloride solutions of (2,4, 6)% NaCl and the metabolic products of Lactic Acid Bifidobacterium bifidum Bacteria sp.

-Bb –12 and Lactobacillus acidophilus–La-05 on the chemical characteristics of Epiniphilus coioides and Scomberiodes commersonianus fillets.

The above named fillets were soaked for one hour were investigated the different NaCl solutions ,and another group were sprayed with Lactic Acid Bacteria metabolites on the rate of 10%(V\W) ml\100gm and left for an hour .

Thereafter , the fillet samples were packed into poly ethylene sacks under vacuum and stored under freezing temp.

( - 18± 2 )°C for 90 days.

The obtained results could be summarized into : Application of lactic acid bacteria metabolites caused a decrease in pH value , similarly the effect of storage period in respect to the Epiniphilus coioides compared to that of the Scomberiodes commersonianus fillets , the concentration of NaCl solution caused the opposite effect on the pH value.

Peroxide number was decreased with application of the NaCl solution , but increased with the increase of storage period .

peroxide number values were 1.31 ,1.42 ,1.51 and 1.61 (meq \kg ) for zero day of storage for the treatment of 0 , 2 ,4 and 6 NaCl % respectively , for the Epiniphilus coioides and Scomberiodes commersonianus fillets .

These numbers were decreased by addition of the Lactic acid bacteria products.

Besides , results shown a lower peroxide number for the and Scomberiodes commersonianus compared to that of Epiniphilus coioides fillets .

peroxide number were 1.61 ,1.24 ,1.23 ( meq \ kg ) for the metabolic products treatment 0%, 10% Bb ,10 %La respectively , on zero day .

Total volatile nitrogen were higher for the treatment of higher concentration of NaCl solution reaching the values of 14.95 ,15.08 ,15.11,15.23 mg N\100gm for the 0,2,4and 6 %NaCl at zero day , respectively ,in the Scomberiodes commersonianus fillets.

But the TVN decreased due to application of metabolic products , whereas , they were increased as storage increased.

TVN values for the metabolic product treatment 0%,10%Bb and 10%La 14.95,14.87,14.90 mg N\100 gm.

respectively, in the zero day in Scomberiodes commersonianus fillets.

TVN values appeared to be lower in Scomberiodes commersonianus fillets compared with Epiniphilus coioides fillets.