การผลิตอาหารเสริมสำหรับทารกโดยกระบวนการเอกซ์ทรูชั่น / วราภรณ์ จำรูญธเนศกุล = Production of supplementary food for infant by extrusion process / Varaporn Chamroontaneskul
The objective of this research is a study of supplementary food for infant from various raw materials by extrusion process. The formulas were obtained by using linear programming method with computer packaged programme called LINDO. All the computerized formulas meet the required nutritional standards set by The Ministry of Public Health – such as protein, essential amino acid, vitamin A, B1, B2, iron and phosphorus. From the linear programming method, there were 7 possible formulas available by the extrusion process. The most acceptable formula by panel test consisted of rice flour 55.02%, egg 18.05%, carrot 3.79%, defatted milk powder 3.14% and soy flour 20.0%. The suitable process conditions for production by extruder were : temperature zone 2 : zone 3 180℃ : 180℃ : screw speed 100 rpm. And the moisture content at 25% by mixed weight. The extrudate was dried at 65℃ to final moisture content about 5% and grounded to powder. The product was analyzed for nutritional values. It was found that the sample met all the required nutritional values except vitamin A which was slightly lower. The product was stored for three consecutive months and samples were drawn for analysis every month. It was found that vitamin B1 gradually decreased. However, the three month shelf-life sample was still accepted by panelists.