1. Dept. of Standardization and Biotechnology; Shakarim State Univ. of Semey; Semey VKO 071412 Kazakhstan
2. Reading School of Pharmacy; Univ. of Reading, Whiteknights; PO Box 224 Reading Berkshire RG6 6AD U.K
3. Dept. of Food and Nutritional Sciences; Univ. of Reading, Whiteknights; Reading Berkshire RG6 6AD U.K