Study of on factor that effect the isoflavone extraction from fermented soybean / by Harisun Yaakob, Noor Azwani Zainol, Yuzaini Yusuf, Rozilawati Abdul Rahim, Ramlan Abd. Aziz, 1958-, Mohamad Roji Sarmidi, Regional Symposium on Chemical Engineering (2002 : Kuala Lumpur)