Metabolic activity and quality changes of fresh-cut kohlrabi (Brassica oleracea L. gongylodes group) stored under controlled atmosphere
Escalona Victor H, Aguayo Encarrna, Artes-Hernandez Francisco and Artes Francisco
Program and Abstract. 9th Controlled Atmosphere Research Conference (CA2005). Michigan State University, East Lansing, Michigan, USA. July 5-10, 2005. page17
2005
บทคัดย่อ
The metabolic activity and the effect of different controlled atmosphere (CA) conditions on the quality of fresh-cut kohlrabi were studied. Atmospheres with 95% RH: 5 kPa O2 + 5 kPa CO2, 5 kP O2 + 15 kPa CO2 and 21 kPa O2 + 0 kPa CO2 (as control) were applied. Sliced kohlrabi was stored for 14 days at 5°C. The respiration rate, ethylene emission, sugar and organic acids content, and sensorial attributes (appearance, flavor, and acceptability) were evaluated. The respiratory activity of fresh-cut kohlrabi was quite similar during the storage period. Fresh-cut kohlrabi showed a respiration rate of 6 a 10 mg CO2 kg-1 h-1 under air condition. Using CA of 5 kPa O2 + 5 kPa CO2 the respiration were reduced to 2 to 4 mg CO2 kg-1 h-1. A decrement in the ethylene emission throughout storage, especially under low O2 and high CO2 levels was found. Sliced kohlrabi stored under CA of 5 kPa O2 + 5 or 15 kPa CO2 showed only a slight delay the sugar and organic acid consumption compared with air condition. For fresh-cut kohlrabi 5 kPa O2 + 15 kPa CO2 was the most appropriated atmosphere to assure a good commercial quality. Studies on fresh-cut kohlrabi are firstly reported here.