FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (23): 366-370.doi: 10.7506/spkx1002-6630-201023081

• Nutrition & Hygiene • Previous Articles     Next Articles

Analysis and Evaluation of Nutritional Components in Cyclina sinensis and Meretrix meretrix

LI Xiao-ying1，DONG Zhi-guo1,2，YAN Bin-lun1，CHENG Han-liang1，MENG Xue-ping1，SHEN He-ding2，LI Jia-le2   

  1. 1. Huaihai Institute of Technology, Provincial Key Laboratory of Marine Biotechnology of Jiangsu, Lianyungang 222005, China；
    2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China
  • Received:2010-03-12 Revised:2010-11-11 Online:2010-12-15 Published:2010-12-29
  • Contact: LI Xiao-ying E-mail:dzg7712@yahoo.com.cn

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Abstract:

The nutritional compositions in Cyclina sinensis and Meretrix meretrix cultured in pond of Haizhou bay in winter were determined. Results indicated that the water content (77.23g/100g mf) and carbohydrate (4.45 g/100g mf) in C. sinensis was similar to that in M. meretrix (76.39 g/100g mf and 4.14 g/100g mf). However, a significant difference in crude ash, protein and fat between two clams was observed (P < 0.05). The content of crude protein was 15.54% in M. meretrix and 11.55% in C. sinensis; contents of crude ash and crude fat in C. sinensis (4.91 g/100g mf and 1.86 g/100g mf) were significantly higher than those in M. meretrix (2.86 g/100g mf and 1.07 g/100g mf). Among six heavy metals including Cd, Cr, Cu, Ni, Pb and Zn, the Zn exhibited the highest content. The content of Zn was 12.77μg/g in C. sinensis and 252.59μg/g in M. meretrix. The contamination assessment results for both clams by single factor index method indicated six heavy metals in both clams were in the permit range of national standard for health aquatic products except for Pb in M. meretrix slightly exceeding the standard limit. There were 18 common amino acids and 10 essential amino acids for human demand. The first limited amino acid was Val and the second limited amino acid was Phe + Tyr in both clams. The content of Glu was the highest among 18 amino acids and its content was up to 116.5 mg/g in C. sinensis and 111.5 mg/g in M. meretrix. The content of delicious amino acids was close in both clams and more than 42%. These investigations suggested that both clams were suitable for diet and delicious additives. The essential amino acid index (IEAA) for C. sinensis was 50.0, which was close to that of M. meretrix (50.3). The ratio of essential amino acids to total amino acids was approximately 45%, which was higher than that of amino acid mode recommended by WHO/FAO (35.38%). Therefore, two clams were ideal as protein source for human.

Key words: Cyclina sinensis, Meretrix meretrix, nutritional composition, evaluation ideal as protein source for human.

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