Sensory and instrumental texture assessment of roasted pistachio nut/kernel by partial least square (PLS) regression analysis: effect of roasting conditions

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• 作者：Toktam Mohammadi Moghaddam ; Seyed M.A. Razavi…
• 关键词：Hardness ; Pistachio ; Roasting ; Sensory evaluation ; Texture
• 刊名：Journal of Food Science and Technology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：53
• 期：1
• 页码：370-380
• 全文大小：663 KB
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• 作者单位：Toktam Mohammadi Moghaddam (1)
  Seyed M.A. Razavi (1)
  Masoud Taghizadeh (1)
  Ameneh Sazgarnia (2)
  
  1. Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), POBox: 91775-1163, Mashhad, Khorasan Razavi, Iran
  2. Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Khorasan Razavi, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nutrition
  Food Science
  Chemistry
  
• 出版者：Springer India
• ISSN：0975-8402

文摘

Roasting is an important step in the processing of pistachio nuts. The effect of hot air roasting temperature (90, 120 and 150 °C), time (20, 35 and 50 min) and air velocity (0.5, 1.5 and 2.5 m/s) on textural and sensory characteristics of pistachio nuts and kernels were investigated. The results showed that increasing the roasting temperature decreased the fracture force (82–25.54 N), instrumental hardness (82.76–37.59 N), apparent modulus of elasticity (47–21.22 N/s), compressive energy (280.73–101.18 N.s) and increased amount of bitterness (1–2.5) and the hardness score (6–8.40) of pistachio kernels. Higher roasting time improved the flavor of samples. The results of the consumer test showed that the roasted pistachio kernels have good acceptability for flavor (score 5.83–8.40), color (score 7.20–8.40) and hardness (score 6–8.40) acceptance. Moreover, Partial Least Square (PLS) analysis of instrumental and sensory data provided important information for the correlation of objective and subjective properties. The univariate analysis showed that over 93.87 % of the variation in sensory hardness and almost 87 % of the variation in sensory acceptability could be explained by instrumental texture properties. Keyword Hardness Pistachio Roasting Sensory evaluation Texture