Abstract:
This study aimed to develop Jaew-film from maltodextrin for the fast dissolving property and xanthan gum for the improvement films mechanical properties. The first part was the selection of the control film-casting solutions (without chili powders and roasted rice). Nine film formulas from 3 Jaew sauce formulas which varying tamarind juice to lime juice ratio as (tamarind juice (1:0), blend (1:1) and lime juice (0:1)) and 3 levels of xanthan gum concentrations (0, 1 and 2% w/w) in the film-casting solutions were studied. The tamarind and blend formulas with 1% xanthan gum were selected based on the films mechanical properties and the high solubility. Next step was the devlepment of Jaew-film product as the drying particles (3 % chili powder and 2 % roasted rice) were applied in film casting process. The thickness of the film was varied at 2 levels (0.4 and 0.8 mm). With particles, the films had higher tensile strength and were able to reconstitute back into sauce easily. The thick films (0.8 mm) showed better mechanical properties than the thin. The film from the blend formula tended to have higher solubility than the that of tamarind formula. From the acceptance test, the 2 formulas of thick Jaew-films were not significant different in liking scores of appearance and texture and also the score for ease of reconstitution (p≥0.05). The reconstituted Jaew sauces were like moderately to high (5-6 from 7 points). Film stability was determined. The tamarind and blend films were stored at 2 temperatures (35 and 45 oC) for 60 days. During storage, films became darker and absorbed more moisture. At the 45 oC condition, films showed significantly higher in tensile strength and lower in elongation, moisture content, aw and solubility (p<0.05). Numbers of total microorganisms did not exceed the standard for both products. The acceptance test showed the decreasing of liking in color during storage but not significant difference between the 2 films. For the reconstituted sauces, liking scores of odor, flavor and overall liking of the tamarind formula tended to be lower and decreased faster than the blend formula. In conclusion, the Jaew-films from tamarind and blend added with 1% xanthan gum and 5% dried particles were developed with acceptable properties.