Effect of high-pressure homogenization on the structure of cassava starch


CHE L., Li D., Wang L., Oezkan N. , Chen X. D. , Mao Z.

INTERNATIONAL JOURNAL OF FOOD PROPERTIES, cilt.10, ss.911-922, 2007 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 10 Konu: 4
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1080/10942910701223315
  • Dergi Adı: INTERNATIONAL JOURNAL OF FOOD PROPERTIES
  • Sayfa Sayısı: ss.911-922

Özet

Cassava starch suspension was homogenized at different pressures (0, 20, 40, 60, 80, and 100 MPa) with a high-pressure homogenizer. To investigate the effect of high-pressure homogenization on the structure of cassava starch, the samples were characterized using microscopy, laser scattering, and X-ray diffraction techniques, with native and heat gelatinized cassava starches as controlled samples. The temperature of starch suspension increased linearly with applied pressure at a rate of 0.187 degrees C/MPa. Microscopy studies showed that cassava starch was partly gelatinized after high-pressure homogenization, and the degree of gelatinization increased with homogenizing pressure. Results of laser scattering measurements suggested a considerable increase in particle size after homogenization at 100 MPa as a result of granule swelling. The Xray diffraction pattern showed that there was no evident change after homogenization suggesting that the crystalline structure of starch granules was resistant to high-pressure homogenization.