Effect of ultrasonic treatment on the rheological properties and particle size of gum tragacanth dispersions from different species

Mina Farzi, Mohammad Mahdi Saffari, Zahra Emam-Djomeh, Mohammad Amin Mohammadifar

Research output: Contribution to journalJournal articleResearchpeer-review


Dispersions of different species of gum tragacanth were sonicated at a frequency of 24 kHz with a total nominal output power of 200 W for different time intervals (0, 7, 15, 45 and 90 s). Various species behave differently under sonication, which is related to structural differences in these species. In the case of Astragaslus compactus and A. rahensus dispersions, as the sonication time increased, the viscosity and particle size of the dispersions decreased, just as in gum Arabic solutions. However, A. gossypinus gum behaved differently compared to the other species. At early stages of sonication (up to 15 s), the viscosity of the dispersions increased sharply and reached its maximum value (106.04 mPa s) as the particle size increased slightly to 275.69 mu m. Continuing sonication led to a decrease in the viscosity of the dispersions, though the particle size did not show any changes. This behaviour is thought to be due to the rupture and aggregation of particles.
Original languageEnglish
JournalInternational Journal of Food Science and Technology
Issue number4
Pages (from-to)849-854
Number of pages6
Publication statusPublished - 2011
Externally publishedYes


  • Food Science
  • Industrial and Manufacturing Engineering
  • Aggregation
  • Gum tragacanth
  • Particle size
  • Ultrasonic treatment
  • Viscosity
  • Gum arabic
  • Maximum values
  • Output power
  • Rheological property
  • Structural differences
  • Time interval
  • Ultrasonic treatments
  • Behavioral research
  • Dispersions
  • Rheology
  • Sonication
  • Ultrasonic equipment
  • Ultrasonics
  • Viscometers
  • Agglomeration
  • Acacia senegal
  • gum tragacanth
  • particle size
  • ultrasonic treatment
  • viscosity
  • ULTRASONIC therapy
  • particle aggregation
  • rheological property
  • structural difference
  • viscosity factor
  • Dicotyledones Angiospermae Spermatophyta Plantae (Angiosperms, Dicots, Plants, Spermatophytes, Vascular Plants) - Leguminosae [26260] Astragaslus compactus species Astragaslus rahensus species Astragaslus gossypinus species

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