Tools for studying dry-cured ham processing by using computed tomography.

An accurate knowledge and optimization of dry-cured ham elaboration processes could help to reduce operating costs and maximize product quality. The development of nondestructive tools to characterize chemical parameters such as salt and water contents and a(w) during processing is of special interest. In this paper, predictive models for salt content (R(2) = 0.960 and RMSECV = 0.393), water content (R(2) = 0.912 and RMSECV = 1.751), and a(w) (R(2) = 0.906 and RMSECV = 0.008), which comprise the whole elaboration process, were developed. These predictive models were used to develop analytical tools such as distribution diagrams, line profiles, and regions of interest (ROIs) from the acquired computed tomography (CT) scans. These CT analytical tools provided quantitative information on salt, water, and a(w) in terms of content but also distribution throughout the process. The information obtained was applied to two industrial case studies. The main drawback of the predictive models and CT analytical tools is the disturbance that fat produces in water content and a(w) predictions.

[1]  Søren G. H. Erbou,et al.  Salt distribution in dry-cured ham measured by computed tomography and image analysis. , 2005, Meat science.

[2]  J. Arnau,et al.  Processing of dry-cured ham in a reduced-oxygen atmosphere: effects on physicochemical and microbiological parameters and mite growth. , 2010, Meat science.

[3]  P. Gou,et al.  Salting, drying and sensory quality of dry-cured hams subjected to different pre-salting treatments: skin trimming and pressing. , 2012, Meat science.

[4]  P. Gou,et al.  Water transfer analysis in pork meat supported by NMR imaging. , 2004, Meat science.

[5]  C. Vestergaard,et al.  Quantification of salt concentrations in cured pork by computed tomography. , 2004, Meat science.

[6]  P. Fito,et al.  Post-salting studies in Spanish cured ham manufacturing. Time reduction by using brine thawing-salting. , 2005, Meat science.

[7]  O. Sørheim,et al.  Computed tomography for quantitative determination of sodium chloride in ground pork and dry-cured hams. , 2007, Journal of food science.

[8]  L. Leistner,et al.  The Significance of Water Activity for Micro-organisms in Meats , 1975 .

[9]  Assessment of water diffusivity in gelatine gel from moisture profiles. I––Non-destructive measurement of 1D moisture profiles during drying from 2D nuclear magnetic resonance images , 2005 .

[10]  F. Toldrá,et al.  Accelerated processing of dry-cured ham. Part I. Viability of the use of brine thawing/salting operation. , 2006, Meat science.

[11]  X. Serra,et al.  Effect of pH(24), NaCl content and proteolysis index on the relationship between water content and texture parameters in biceps femoris and semimembranosus muscles in dry-cured ham. , 2006, Meat science.

[12]  T. Antequera,et al.  Use of simultaneous brine thawing/salting in dry-cured Iberian ham production , 2011 .

[13]  J. Comaposada,et al.  Technologies to shorten the drying period of dry-cured meat products. , 2007, Meat science.

[14]  Jean-Marie Bonny,et al.  Assessment of water diffusivity in gelatine gel from moisture profiles. II. Data processing adapted to material shrinkage , 2005 .

[15]  Pere Gou,et al.  Non-destructive analysis of aw, salt and water in dry-cured hams during drying process by means of computed tomography. , 2010 .

[16]  P. Gou,et al.  Prediction of salt and water content in dry-cured hams by computed tomography. , 2010 .

[17]  Bjørg Egelandsdal,et al.  Use of computed tomography to study raw ham properties and predict salt content and distribution during dry-cured ham production. , 2012, Meat science.

[18]  P. Gou,et al.  Physical and chemical changes in different zones of normal and PSE dry cured ham during processing , 1995 .

[19]  P. Gou,et al.  The influence of meat pH on mechanical and sensory textural properties of dry-cured ham. , 1999, Meat science.

[20]  F. Toldrá,et al.  Study of salting and post-salting stages of fresh and thawed Iberian hams. , 2008, Meat science.

[21]  L. Leistner,et al.  Microbiology of meat and meat products in high- and intermediate-moisture ranges. , 1978 .

[22]  O. Sørheim,et al.  Salt distribution in cured hams studied by computer-X-ray tomography. , 1989 .

[23]  A. Kohler,et al.  Determination of sodium chloride in pork meat by computed tomography at different voltages. , 2008, Journal of food science.

[24]  J. Arnau,et al.  Effect of the inoculation of a starter culture and vacuum packaging (during resting stage) on the appearance and some microbiological and physicochemical parameters of dry-cured ham. , 2008, Meat science.