Abstract
AbstractThe effects of ultrahigh speed grinding process duration of 2–4 min and its storage temperature on rheological, textural and physical properties of natural peanut butter produced from peanuts of Virginia and Spanish varieties were investigated. Both types of peanut butter samples exhibited food suspension with multimodal particle size distribution, fitted adequately to the Casson model and demonstrated nonNewtonian shear‐thinning behavior with apparent yield stress. The storage (G′) and loss (G′′) modulus decreased as a function of grinding time and temperature. Grinding time and storage temperature gave significant effects on all the responses (P < 0.05) while peanut variety only has impact on the particle size distribution. Identical trends were observed for the natural peanut butter from both Virginia and Spanish peanut varieties.Practical ApplicationsProcessing and storage temperature are among factors influencing texture of food suspension such as butter and spreads. Our research investigated the effect of grinding time and storage temperature on rheological, textural and physical properties of natural peanut butter in the effort of producing optimum quality in terms of finest texture. The relationship between particle size distribution and textural properties is useful in the development of natural peanut butter with this study focusing on grinding effects as its processing and stability in terms of storage temperature.
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