Production and quality control of shrimp feed containing turmeric extract

Abstract

The purpose of the present study was to produce shrimp feed containing turmeric extractwhich typically contains three major curcuminoid active compoundsi.e., curcumin, desmethoxycurcumin and bisdesmethoxycurcumin. Preformulation indicated that incompatibility of the initial shrimp feed and turmeric extract, evaluated by differential scanning calorimeter (DSC), did not occur. The shrimp feed containing turmeric extract were produced by first preparing turmeric extract concentrated solution and/or turmeric extract concentrated emulsion to be used in the coating and/or extrusion processes. Shrimp feeds containing turmeric extract after processed were characterized. The results indicated that processing methods affect the physical properties and release characteristics of shrimp feeds containing turmeric extract produced. Shrimp feed obtained by coating method showed excellent physical properties compared to extrusion method. This may be because initial shrimp feed core was not destroyed during the process as in extrusion method. However, extruded products resulted in a more desirable sustained release character due to an incorporation of turmeric extract within the feed matrix. The results also showed that types of liquid turmeric extract concentrate had significant influence on the chemical stability, both after processing and 6 months of storage. It can be postulated that the oil phase in turmeric extract concentrated microemulsion aid in protecting turmeric extract against degradation caused by coating or extrusion environment and during storage.