Influence of Low-temperature Processing of the Brackish-water Bivalve,Corbicula japonica, on the Ornithine Content of Its Extract

Abstract

The ornithine content of an extract of the brackish-water bivalve, Corbicula japonica, increased when the bivalve was frozen. It was not influenced by the period of freezing. This phenomenon was not apparent in the scallop, little-neck clam, or hard clam. We applied various low-temperature conditions for processing the bivalve from 4 degrees C to -10 degrees C and measured the ornithine content of each extract. The ornithine content was maximized by processing at - 4 degrees C. The increase in this ornithine content was reduced when the bivalve was stored at 5 degrees C or 15 degrees C after processing at - 4 degrees C, this decrease being reversed when the bivalve was again processed at - 4 degrees C after warming. Low-temperature processing of the brackish-water bivalve therefore increased the ornithine content of the extract.

Randomised controlled trial of the effects of L-ornithine on stress markers and sleep quality in healthy workers

“…Since ancient times, corbicula, a genus of the clam, has been considered to be good for the liver. They were found to contain 159.9 mg L-ornithine per 100 g of the extract [21], which is high compared with other foods [22] but still a relatively small amount.…”

Lactobacillus brevisOPK‐3 isolated from kimchi inhibits adipogenesis and exerts anti‐inflammation in 3T3‐L1 adipocyte

“…Brackish-water bivalves, wine, cheese and kimchi are major dietary sources of L-ornithine for humans. 20,21 Ornithine has been proven to be effective in increasing muscle synthesis and rapid metabolization of body fat by stimulating growth hormone secretion, 22,23 improving insulin release, 24 boosting the immune system, 25 enhancing the wound healing response 26 and reducing blood ammonia concentration associated with several hepatic diseases and brain oedema. 27 Many LAB with ornithine-producing ability have been isolated from Korean traditional fermented foods such as kimchi.…”

Predicting acute copper toxicity to valve closure behavior in the freshwater clam Corbicula fluminea supports the biotic ligand model

“…indicated that a freshwater clam Corbicula fluminea extract (or referred to as clam essence) con-tained more ornithine than that in a chicken or beef essence in that ornithine is attractive as an ingredient of dietary supplements due to in part that ornithine could promote the secretion of the growth hormone and build muscle (Bucci et al, 1990;Davenport et al, 1990;Uchisawa et al, 2004). This evidence makes brackish-water and freshwater C. fluminea commercially important and has a high market value to Taiwan's aquaculture (http://www.fa.gov.tw).…”