Effect of Delayed Icing on the Microbiological Quality of Hilsa Toli

Effect of delayed icing on the microbial quality and shelf-life of Hilsa toll was studied . Fish iced in rigor condition had a shelf-life of 11 days irrespective of the state of rigor . Fish procured from the landing centre had a shelf-life of only 8 days . It showed the presence of coagulase positive staphylococci, faecal streptococci and E. coli. Total bacterial count was low in all the samples and it increased after spoilage

Effect of Carbon Black on the Mechanical and Dielectric Properties of Rubber Ferrite Composites Containing Barium Ferrite

Fine particles of barium ferrite (BaFe12O19) were synthesized by the conventional ceramic technique. These materials were then characterized by the X-ray diffraction method and incorporated in the natural rubber matrix according to a specific receipe for various loadings of ferrite. The rubber ferrite composites (RFC) thus obtained have several applications, and have the advantage of molding into complex shapes. For applications such as microwave absorbers, these composites should have an appropriate dielectric strength with the required mechanical and magnetic properties. The N330 (HAF) carbon black has been added to these RFCs for various loadings to modify the dielectric and mechanical properties. In this article we report the effect of carbon black on the mechanical and dielectric properties of these RFCs. Both the mechanical and dielectric properties can be enhanced by the addition of an appropriate amount of carbon black