%0 Conference Proceedings %T Change of cell envelope in Lactobacillus acidophilus and Streptococcus thermophilus with ultrasound and heat stress for Increase of enzyme activity %A Tabatabaei Yazdi, Farideh %A Mortazavi, Sayed Ali %J شانزدهمین کنفرانس سراسری و چهارمین کنفرانس بین المللی زیست شناسی(1389) %D 2010