Effect of Moisture Content and Screw Speed on the Physical Chemical Properties of an Extruded Crab-based Snack

Abstract

Crab processing generates by-products that could be used in new value-added products to decrease processing waste and increase profits. In this product development study, the effects of moisture content and screw speed on physical properties and composition of an extruded crab-based snack product were investigated. Corn meal was fortified with 10% ground crab leg and passed through a twin-screw extruder using moisture contents of 25% and 30% and screw speeds of 200, 250 and 300rpm for a total of six treatments, extruded in duplicate. Screw speed and moisture content had a significant (p 0.05) influence on moisture content, expansion ratio, crunchiness and L-value of the extrudate while protein, fat, ash and mineral were not significantly (p 0.05) affected. As screw speed increased, moisture content and bulk density of the extrudates decreased. The snack product extruded at 25% moisture content and 300rpm had significantly different (p 0.05) physical properties compared to all other treatments. Increases in torque and melting temperature were observed for higher screw speed and lower extruding moisture content.

Keywords

extrusion crab by-product moisture content screw speed extrudates corn meal

References

AOAC (1990). Official Methods of Analysis. 15th edn, Association of Official Analytical Chemists. Arlington VA .

Aquilera J.M. , Rossi F. , Hiche E. and Chichester C.O. (1980). Development and evaluation of an extrusion-textured peanut protein . Journal of Food Science 45: 246-251 .

Badrie N. and Mellowes W.A. (1991). Texture and microstructure of cassava flour extrudate . Journal of Food Science 56: 1319-1322 .

Belbez E.O. (1997). Effect of sulfur-containing compounds on the physical properties and flavor characteristics of extruded potato flakes. Ph.D. Thesis, University of Maine, Orono USA.

Barrett A.H. and Kaletunc G. (1998). Qualitative description of fracturability changes in puffed corn extrudates affected by sorption of low levels of moisture . Cereal Chemistry 75(5): 695-698 .

Bourne M.C. (1978). Texture profile analysis . Food Technology 32(7): 62-66, 72 .

Camire M.E. (1998). Chemical changes during extrusion cooking. In: Shahidi F. , Chi-Jang and Chuyen N. (eds), Processing Induced Chemical Changes in Food. New York: Plenum Press , pp. 109-121.

Chen J. , Serafin F.L. , Pandya R.N. and Dau H. (1991) Effect of extrusion conditions on sensory properties of corn meal extrudates . Journal of Food Science 56(1): 84-89 .

Choudhury G.S. and Gogoi B.K. (1995). Extrusion processing of fish muscle: a review . Journal of Aquatic Food Product Technology 4(4): 37-67 .

10.

Giri S.K. and Bandyopadhyay S. (1999). Effect of extrusion variables on extrudate characteristics of fish muscle-rice flour blend in a single-screw extruder . Journal of Food Processing and Preservation 24: 177-190 .

11.

Gogoi B.K. and Yam K.L. (1994). Relationship between residence time and process variables in co-rotating twin-screw extruder . Journal of Food Engineering 21: 177-196 .

12.

Harper J.M. (1981). Extrusion of Foods. Vol. 1, Boca Raton, FL: CRC Press , pp. 7-163.

13.

Kirby A.R. , Ollett A.L. , Parker R. and Smith A.C. (1984). An experiment study of screw configuration effects in the twin-screw extrusion cooking of maize grit . Journal of Food Engineering 8: 247-272 .

14.

Kokini J.L. , Chang C.N. and Lai L.S. (1992). The role of rheological properties on extrudate expansion. In: Kokini J.L. , Ho C.T. and Karwe M.V. (eds), Food Extrusion Science and Technology. New York: Marcel Dekker, Inc. , pp. 631-652.

15.

Kristensen K.H. , Gray P. and Holm F. (1984). Extruded protein-rich animal by-products with improved texture. In: Zeuthen P. (ed.), Thermal Processing and Quality of Foods. New York: Elsevier Applied Science Publishers , pp. 113-121.

16.

Liu Y. , Hsieh E. , Heymann H. and Huff H.E. (2000). Effect of process conditions on the physical and sensory properties of extruded oat-corn puff . Journal of Food Science 65(7): 1253-1259 .

17.

Madden R.C. (2000). A Brief Users Guide to Systat for Windows: Version 9. Online, Mary Mount College, Tarrytown, NY .

18.

Meuser F. and Wiedmann W. (1989). Extrusion plant design. In: Mercier C. , Linko P. and Harper J.M. (eds), Extrusion Cooking. St Paul, US: AACC , pp. 91-155.

19.

Murphy M.G. , Skonberg D.I. Camire M.E. , Dougherty M.P. , Bayer R.C. and Briggs J.L. (2003). Chemical composition and physical properties of extruded snacks containing crab-processing by-product . Journal of the Science of Food and Agriculture 83: 1163-1167 .

20.

Neter J. , Hunter M. , Nachtseim C. and Wasserman W. (1996). Applied Linear Statistical Models. 4th edn, Chicago, IL: Irwin Publishing .

21.

Onwulata C.I. and Heymann H. (1994). Sensory properties of extruded cornmeal related to the spatial distribution of process conditions . Journal of Sensory Studies 9: 101-112 .

22.

Onwulata C.I. Konstance R.P. , Smith P.W. and Holsinger V.H. (1998). Physical properties of extruded product as affected by cheese whey . Journal of Food Science 63(5): 814-818 .

23.

Riaz M.N. (2000). Introduction to extruders and their principles. In: Extruders in Food Applications. Lancaster, PA: Technomic Publ. Co.

24.

Stanley, D.W. (1986). Chemical and structural determinants of texture of fabricated foods . Food Technology 40(3): 65 .

25.

Suknark K. , McWatters K.H. and Phillips R.D. (1998). Acceptance by American and Asian consumers of extruded fish and peanut snack products . Journal of Food Science 63(4): 721-725 .

26.

Suknark K. , Phillips R.D. and Huang Y.-W. (1999). Tapioca-fish and tapioca-peanut snacks by twin-screw extrusion and deep fat frying . Journal of Food Science 64(2): 303-308

27.

Wang N. , Bhirud P.R. , Sosulski F.W. and Tyler T.T. (1999). Pasta-like product from pea flour by twin-screw extrusion . Journal of Food Science 64(4): 671-678 .

28.

Yeh A.L. and Jaw Y.M. (1999). Effect of feed rate and screw speed on operating characteristics and extrudate properties during single-screw extrusion cooking of rice flour . Cereal Chemistry 76(2): 236-242 .