 |
|
 |
|
|
|
 |
|
|
|
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Pineapple Juice, Pineapple Shell Extract and Rice Bran Extract on Browning Prevention in Banana [Musa (AAA Group) ‘Gros Michel’] Slices and Puree) ผู้เขียน: ดร.โชคชัย ธีรกุลเกียรติ, ศาสตราจารย์ ,  สุคนธา สุคนธ์ธารา สื่อสิ่งพิมพ์:pdf AbstractThe effects of pineapple juice (PJ), pineapple shell extract (PSE) and rice bran extract (RBE) on browning in the banana slices and puree compared with citric acid solution (pH 3.8) (PH) and distilled water (DW) were investigated by measuring the color changes of the banana slices and puree. RBE treated banana slices had lower browning value than those treated with PJ, PSE, PH and DW after stored for 3 and 12 hrs (p?0.05). Their browning values after 12 hrs were 12.05, 17.26, 17.56, 19.54 and 20.59, respectively. The L* values of banana slices treated with RBE were higher while its a* values were lower than those treated with PJ, PSE, PH and DW after stored for 12 hrs. The browning value of RBE treated banana puree (22.63) was lower than those treated with PSE (28.68) and PJ (32.26) after stored for 5 hrs (p?0.05).The L* values of banana puree treated with RBE were higher whereas its a* values were lower than those treated with PJ, PSE, PH and DW after stored for 6 hrs. In conclusion, RBE could reduce browning in banana slices and puree more effectively than PJ, PSE, PH and DW. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Optimization of Pectinase Enzyme Liquefaction of Banana ‘Gros Michel’ for Banana Syrup Production) ผู้เขียน:ดร.สุคันธรส ธาดากิตติสาร , นายวิชัย หฤทัยธนาสันติ์, รองศาสตราจารย์ , ดร.เพ็ญขวัญ ชมปรีดา, รองศาสตราจารย์ , ดร.ธงชัย สุวรรณสิชณน์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe pectinase enzyme liquefaction of banana ‘Gros Micheal’ pulp was optimized by response surface methodology (RSM). The effect of pectinase enzyme concentrations (0-0.2%) and incubation times (60-300 min) on juice yield (%), total soluble solids (TSS), recovery soluble solids (RSS), clarity (%T670) and browning index (A420) of juice were studied using central composite design of experiments. Results showed that pectinase enzyme concentration played an important role that significantly (p ? 0.001) influenced most of dependent variables of banana juice. The coefficient of determination (R2) of yield (%), recovery soluble solids (RSS), clarity (%T670) and browning index (A420) were 0.907, 0.924, 0.804 and 0.793, respectively. The optimum condition for enzymatic extraction was 0.15% of pectinase enzyme incubated for 120 min at 50?C. The yield was ? 62%, RSS ?14, %T670 ? 96% and A420 ? 0.1. The physicochemical compositions of syrup were mostly three times higher than juice owing to the concentration that increased from 24 to 74? Brix except for pH, clarity (%T670), CIE L* which were not changed. |
|
|
|
|
|
|
 |
ที่มา:มหาวิทยาลัยเกษตรศาสตร์หัวเรื่อง:การศึกษาสภาวะที่เหมาะสมในการสกัดเอนไซม์เพคติเนสจากผลกล้วยหอมทอง |