PSYCHOPHYSICAL MARKERS FOR CRISPNESS AND INFLUENCE OF PHASE BEHAVIOR AND STRUCTURE

ABSTRACT This article focuses on developing a psychophysical model for sensory crispness and understanding the role of structure and phase behavior of the food polymer matrix in terms of affecting crispness. The core hypothesis of the article is that the number peaks during brittle fracture of food foams is the stimulus for crispness. Accurate mechanical methods were developed to count the peaks and then relate them to sensory crispness scores utilizing magnitude estimation. An excellent correlation was obtained with data that was generated in three independent sets of measurements. Finally, models describing the relationship between structure, mechanical signatures and sensory crispness of extruded cellular foods were developed. PRACTICAL APPLICATIONS Texture is one of the most important quality attributes of food products. The fracture properties of the foods have to be clearly understood, because they are one the most important manifestations of texture. Understanding the fracture process in-depth can help increase consumer acceptability by generating structures leading a particular breakdown behavior, because the sensory attributes like crispness are directly related to how the fracture occurs in solid food foams. The psychophysical model developed in this study will serve as a very useful tool for assessing the effects of changes in formulation and processing that result in a wide range of structural features leading to the desired crisp sensation in the final product.

[1]  Shanfu Zheng,et al.  Taylor Averaging on Heterogeneous Foams , 2003 .

[2]  C. Dacremont,et al.  Understanding the texture of low moisture cereal products: mechanical and sensory measurements of crispness , 2000 .

[3]  L. M. Duizer,et al.  Sensory, instrumental and acoustic characteristics of extruded snack food products , 1998 .

[4]  Julian F. V. Vincent,et al.  The quantification of crispness , 1998 .

[5]  M Peleg,et al.  Measures of line jaggedness and their use in foods textural evaluation. , 1997, Critical reviews in food science and nutrition.

[6]  Micha Peleg,et al.  Determination of the apparent fractal dimension of the force-displacement curves of brittle snacks by four different algorithms , 1996 .

[7]  Mark D. Normand,et al.  ON THE APPARENT FRACTAL DIMENSION OF SOUND BURSTS IN ACOUSTIC SIGNATURES OF TWO CRUNCHY FOODS , 1996 .

[8]  M. Peleg,et al.  Stiffness assessment from jagged force-deformation relationships , 1995 .

[9]  Micha Peleg,et al.  Applications of fractal analysis to food structure , 1995 .

[10]  C. Dacremont,et al.  SPECTRAL COMPOSITION OF EATING SOUNDS GENERATED BY CRISPY, CRUNCHY AND CRACKLY FOODS , 1995 .

[11]  M. Peleg,et al.  Effect of Equilibrium Relative Humidity on the Mechanical Signatures of Brittle Food Materials , 1993 .

[12]  J. Kokini,et al.  THE PSYCHOPHYSICS OF POURING, SPREADING AND IN‐MOUTH VISCOSITY , 1992 .

[13]  Micha Peleg,et al.  Extrudate Cell Structure‐Texture Relationships , 1992 .

[14]  J. Kokini,et al.  The study of the glass transition of glutenin using small amplitude oscillatory rheological measurements and differential scanning calorimetry , 1991 .

[15]  E. Ross,et al.  Correlation of extrudate infusibility with bulk properties using image analysis , 1990 .

[16]  J. M. Bouvier,et al.  COMPUTERIZED IMAGE ANALYSIS AND TEXTURE OF EXTRUDED BISCUITS , 1989 .

[17]  Zata M Vickers,et al.  Instrumental Acoustical Measures of Crispness in Foods. , 1985 .

[18]  Zata M Vickers,et al.  The relationships of pitch, loudness and eating technique to judgments of the crispness and crunchiness of food sounds , 1985 .

[19]  Zata M Vickers,et al.  CRISPNESS AND CRUNCHINESS ‐ A DIFFERENCE IN PITCH? , 1984 .

[20]  Zata M Vickers,et al.  CRACKLINESS: RELATIONSHIPS OF AUDITORY JUDGMENTS TO TACTILE JUDGMENTS AND INSTRUMENTAL ACOUSTICAL MEASUREMENTS , 1984 .

[21]  Jozef L. Kokini,et al.  Predicting the Texture of Liquid and Melting Semi‐Solid Foods , 1983 .

[22]  Howard R. Moskowitz,et al.  SENSORY INTENSITY VERSUS HEDONIC FUNCTIONS: CLASSICAL PSYCHOPHYSICAL APPROACHES , 1982 .

[23]  Zata M Vickers,et al.  Relationships of Chewing Sounds to'Judgments of Food Crispness , 1981 .

[24]  Zata M Vickers,et al.  RELATIONSHIPS BETWEEN SENSORY CRISPNESS AND OTHER SENSORY AND INSTRUMENTAL PARAMETERS , 1980 .

[25]  Jozef L. Kokini,et al.  LIQUID TEXTURE PERCEIVED IN THE MOUTH , 1977 .

[26]  Malcolm C. Bourne,et al.  A PSYCHOACOUSTICAL THEORY OF CRISPNESS , 1976 .

[27]  M. Bourne,et al.  CRISPNESS IN FOODS-A REVIEW , 1976 .

[28]  J. Kokini,et al.  Glass transitions in low moisture and frozen foods: effects on shelf life and quality. , 1996 .

[29]  Micha Peleg,et al.  Patterns of textural changes in brittle cellular cereal foods caused by moisture sorption , 1996 .

[30]  M Peleg,et al.  Fractals and foods. , 1993, Critical reviews in food science and nutrition.

[31]  Mark D. Normand,et al.  Characterization of the Jagged Stress‐strain Relationships of Puffed Extrudates using the Fast Fourier Transform and Fractal Analysis , 1992 .

[32]  C. Dacremont,et al.  CONTRIBUTION OF AIR-AND BONE-CONDUCTION TO THE CREATION OF SOUNDS PERCEIVED DURING SENSORY EVALUATION OF FOODS , 1991 .

[33]  J. Erdman,et al.  NUTRITION LABELINGS : COMPARISON OF PROPOSALS FOR REGULATORY REFORM , 1991 .

[34]  P. Lillford,et al.  Structure, mechanics and texture of a food sponge , 1989 .

[35]  E. Munday,et al.  Analysis of food crushing sounds during mastication : frequency-time studies , 1988 .

[36]  S. Seymour,et al.  Crispness and Crunchiness of Selected Low Moisture Foods , 1988 .

[37]  Zata M Vickers,et al.  Sensory, Acoustical, and Force-Deformation Measurements of Potato Chip Crispness , 1987 .

[38]  J. Kokini,et al.  Identification of Key Textural Attributes of Fluid and Semi‐Solid Foods Using Regression Analysis , 1984 .

[39]  Howard R. Moskowitz,et al.  SENSORY RATIO SCALES RELATING HARDNESS AND CRUNCHINESS TO MECHANICAL PROPERTIES OF SPACE CUBES , 1974 .