The Use X-ray micro-CT for Characterization of Microstructural Properties of deep-fat fried breaded chicken nuggets

Microstructural properties are critical in food quality assessment, product development and process optimization. The use of X-ray micro-CT for food microstructural evaluation is still relatively new and recent studies have shown that the technique has the potential to elucidate microstructural properties of food with greater details and resolution than some other imaging techniques such as microscopy. It gives images in 3-D for better quantitative assessment; involves minimal sample preparation and allows scanning under native environment. This technique was used to study the microstructural properties of breading coating and chicken core parts of deep-fat fried breaded chicken nuggets to obtain microstructural parameters that are useful in quality assessment and process modeling. The results obtained showed a significant (P<0.05) influence of frying conditions on microstructural properties of the deep-fat fried breaded chicken nuggets. The porosity of the breading coating increased while that of the core remained relatively unchanged with frying time. The number of pores also increased with frying. The chicken nuggets coating and core pores showed a decreased interconnectivity after frying. The shapes of the samples’ pores were between plate and rod-like structure. The pore size distribution for the coating and the core parts showed an increase in pores with diameter <100µm in terms of volume and number count. Some correlations were observed between the sample’s (coating and core) porosity and frying time, fat content and moisture loss.

[1]  N. Otsu.  A threshold selection method from gray level histograms , 1979 .

[2]  José Miguel Aguilera,et al.  Why food microstructure , 2005 .

[3]  M Vogel,et al.  Trabecular bone pattern factor--a new parameter for simple quantification of bone microarchitecture. , 1992, Bone.

[4]  Lucas J. van Vliet,et al.  3D IMAGING AND ANALYSIS OF POROUS CEREAL PRODUCTS USING X-RAY MICROTOMOGRAPHY , 2007 .

[5]  I. Saguy,et al.  Deep-fat fried potato product oil uptake as affected by crust physical properties , 1995 .

[6]  P. Falcone,et al.  A novel approach to the study of bread porous structure: Phase-contrast X-ray microtomography , 2004 .

[7]  Michael Ngadi,et al.  Pore Development and Moisture Transfer in Chicken Meat during Deep-Fat Frying , 2005 .

[8]  Syed S. H. Rizvi,et al.  Use of non-invasive X-ray microtomography for characterizing microstructure of extruded biopolymer foams , 2005 .

[9]  L. Feldkamp,et al.  Practical cone-beam algorithm , 1984 .

[10]  M. Ngadi,et al.  Pore structure characterization of deep-fat-fried chicken meat , 2004 .

[11]  M. Rahman,et al.  TOWARD PREDICTION OF POROSITY IN FOODS DURING DRYING: A BRIEF REVIEW , 2001 .

[12]  Sasov,et al.  Desktop X‐ray microscopy and microtomography , 1998, Journal of microscopy.

[13]  Fat crystals, emulsifiers and liquid crystals. From structure to functionality , 1998 .

[14]  Sakamon Devahastin,et al.  Effect of far-infrared radiation assisted drying on microstructure of banana slices: An illustrative use of X-ray microtomography in microstructural evaluation of a food product , 2008 .

[15]  M. Rahman,et al.  Pores and physico-chemical characteristics of dried tuna produced by different methods of drying , 2002 .

[16]  K. S. Lim,et al.  X-ray micro-computed tomography of cellular food products , 2004 .

[17]  TOR Hildebrand,et al.  Quantification of Bone Microarchitecture with the Structure Model Index. , 1997, Computer methods in biomechanics and biomedical engineering.

[18]  M. Ferrando,et al.  Review: Confocal scanning laser microscopy. A powerful tool in food science Revision: Microscopía láser confocal de barrido. Una potente herramienta en la ciencia de los alimentos , 2000 .

[19]  Karl McDonald,et al.  The formation of pores and their effects in a cooked beef product on the efficiency of vacuum cooling , 2001 .

[20]  W. Horwitz.  Official Methods of Analysis , 1980 .

[21]  M. Kaláb,et al.  Microscopy and other imaging techniques in food structure analysis , 1995 .

[22]  J. Maas,et al.  Nuclear Magnetic Resonance Microimaging of Strawberry Flower Buds and Fruit , 1995 .

[23]  Da‐Wen Sun,et al.  Automatic measurement of pores and porosity in pork ham and their correlations with processing time, water content and texture. , 2006, Meat science.

[24]  L. Ballerini,et al.  Pore formation in cured-smoked pork determined with image analysis-effects of tumbling and RN(-) gene. , 2003, Meat science.