Physical and structural characteristics of dates

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This chapter presents the geometric characteristics, sorption isotherm, state diagram and instrumental texture profile analysis (TPA) of dates. The surface area and volume of date fruit can be estimated considering its shape as oblate spheroid. The GAB model parameters for date-fruits are compiled and can be used to predict the moisture sorption isotherm within the water activity 0.1 and 0.9. The BET monolayer values of date flesh vary from 8.88 to 12.43 g/100 g dry solids. Parameters of the Chen model for predicting freezing point are compiled for different dates. Similarly, parameters of Gordon-Taylor model are also compiled. The ultimate maximal-freeze-concentration condition of Deglet Nour dates was determined Tm' equal to -38.2 �C and Tg' as -48.0 �C with unfreezable water as 22 g/100 g. Thermal and mechanical analysis can be used to explore different structural characteristics of date flesh; these are matrix mobility, reaction and softening characteristics, melting and instrumental TPA.

Original languageEnglish
Title of host publicationDates: Postharvest Science, Processing Technology and Health Benefits
Publisherwiley
Pages157-169
Number of pages13
ISBN (Electronic)9781118292419
ISBN (Print)9781118292372
DOIs
Publication statusPublished - Sep 20 2013

Fingerprint

dates (fruit)
Freezing
Fruits
Isotherms
Sorption
Water
sorption isotherms
Textures
Hot Temperature
texture
Monolayers
freezing point
Melting
Moisture
melting
water activity
surface area
heat
Phoeniceae
water

Keywords

  • BET-monolayer moisture
  • Freezing point
  • Glass transition
  • Maximal-freeze-concentration conditions
  • Moisture sorption isotherm
  • State diagram
  • Texture profile analysis (TPA)
  • Un-freezable water
  • Water activity

ASJC Scopus subject areas

  • Engineering(all)
  • Agricultural and Biological Sciences(all)

Cite this

Rahman, M. S. (2013). Physical and structural characteristics of dates. In Dates: Postharvest Science, Processing Technology and Health Benefits (pp. 157-169). wiley. https://doi.org/10.1002/9781118292419.ch7

Physical and structural characteristics of dates. / Rahman, Mohammad Shafiur.

Dates: Postharvest Science, Processing Technology and Health Benefits. wiley, 2013. p. 157-169.

Research output: Chapter in Book/Report/Conference proceedingChapter

Rahman, MS 2013, Physical and structural characteristics of dates. in Dates: Postharvest Science, Processing Technology and Health Benefits. wiley, pp. 157-169. https://doi.org/10.1002/9781118292419.ch7
Rahman MS. Physical and structural characteristics of dates. In Dates: Postharvest Science, Processing Technology and Health Benefits. wiley. 2013. p. 157-169 https://doi.org/10.1002/9781118292419.ch7
Rahman, Mohammad Shafiur. / Physical and structural characteristics of dates. Dates: Postharvest Science, Processing Technology and Health Benefits. wiley, 2013. pp. 157-169
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