Changes in Lipid Profiles of Dried Clams (Mactra chinensis Philippi and Ruditapes philippinarum) during Accelerated Storage and Prediction of Shelf Life

Abstract

To predict the shelf life through an Arrhenius model and evaluate the changes in lipid profiles, two types of dried clams were stored at 50 and 65 °C and collected periodically for analysis. The predicted shelf life values of the two dried clam samples were 530 ± 14 and 487 ± 24 h (24 °C), and the relative errors between the actual and predicted values were 5.7 and 6.8%, respectively. During accelerated storage, the peroxide value, p-anisidine value, thiobarbituric acid-reactive substances value, total oxidation value, acid value, and free fatty acid content all increased, while the levels of triacylglycerol, phosphatidylcholine, phosphatidylethanolamine, major glycerophospholipid molecular species, and polyunsaturated fatty acid (PUFA) decreased. Moreover, content of phospholipid containing PUFA decreased significantly than that of triacylglycerol containing PUFA. Results indicated that the Arrhenius model was suitable for the shelf life prediction of dried clams and accelerated storage caused loss in quality of dried clams in terms of lipids.

Impact of different drying processes on the lipid deterioration and color characteristics of Penaeus vannamei

“…The AnV was determined as explained by Xie et al 21 with a slight modification. The AnV was calculated using:…”

“…The contents of FFA and TAG in shrimp samples upon various treatments were determined by thin layer chromatography-flame ionization detection. 21 The TAG and FFA contents were expressed as mg g −1 shrimp sample (on a dry weight basis), calculated by the standard curve method with purified TAG and DHA as standards.…”

“…The contents of PC and PE in shrimps upon various treatments were quantitatively determined by using a HPLC-evaporative light scattering detector. 21 The PC and PE contents were expressed as μg g −1 of dry matter, calculated by the standard curve method with PC (16:0/18:1) and PE (16:0/18:1) as standards.…”

Effect of chitosan coatings incorporated with antioxidants of bamboo leaves and potassium sorbate on lipid oxidation and hydrolysis of scallop ( Chlamys farreri) during refrigerated storage

“…The TBARS of the scallop adductor muscle were determined according to Khan et al (2006) with some modifications (Xie et al, 2018) and expressed as mg malondialdehyde (MDA)/kg sample.…”

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