บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Application of postharvest coatings to fresh cassava roots (Manihot esculenta Cranz) for reduction of vascular streaking.

Sargent, S. A.; Correa, T. B. S.; Soares, A. G.;

Harvest and postharvest technologies for fresh fruits and vegetables, Proceedings Guanajuato, Mexico, 20-24 February, 1995. Year: 1995 Pages: 331-336 Ref: 6 ref.

1995

บทคัดย่อ

Application of postharvest coatings to fresh cassava roots (Manihot esculenta Cranz) for reduction of vascular streaking.

ABSTRACT :

 

The efficacy of carnauba wax (100%), 2 USDA microemulsions (M91A (an oxidized polyethylene/petroleum emulsion) and M97B (a carnauba wax/petroleum wax emulsion)) and xanthan gum (1%) was tested as alternatives to paraffin wax (100%) for control of the physiological disorder vascular streaking (VS) of cassava. The roots were obtained on the day of harvest near Rio de Janeiro, Brazil, washed, dried, coated and stored at 5 or 25 deg C, RH 90%, and evaluated periodically for 30 d. On paraffin-treated roots stored at 25 deg , VS and decay were absent for 14 d longer than on untreated roots, roots treated with emulsion waxes and xanthan gum. Carnauba wax delayed the symptoms by 5 d longer than other coatings. Storage at 5 deg maintained roots free from VS for 7 d and decay for 16-30 d, irrespective of coating. In the 2nd test, paraffin wax was compared with 2 carnauba emulsions and a vegetative oil emulsion at storage temp. 25 deg . Carnauba emulsion maintained root quality equivalent to paraffin wax.

No differences between the treatments were found for cooking time, pulp colour and moisture content.