Changes in Quality of Garlic during Frozen Storage

마늘의 냉동저장중 품질변화

  • Shin, Dong-Bin (Korea Food Reserach Institute) ;
  • Lee, Young-Chun (Department of Food Science and Technology, Chung-Ang University) ;
  • Kim, Ji-Hyun (Department of Food Science and Technology, Chung-Ang University)
  • Published : 2000.02.28

Abstract

Peeled garlic was stored at $-18^{\circ}C\;and\;-40^{\circ}C$, respectively and changes in main quality factors during storage were determined for $15{\sim}16$ months. The puncture force measured by texturemeter was $2709{\pm}368$ G.S at the beginning of storage and did not change significantly after the 15 months storage. Drip losses of stored garlic were 0.4% and 0.7% at $-18^{\circ}C\;and\;-40^{\circ}C$, respectively. Major flavor compounds of garlic analyzed by GC and GC/MS, such as diallyl disulfide, 1,3-dithiane, diallyl sulfide, 2-butanal, were not changed in their quantity during the frozen storage. The contents of cysteine, valine and tyrosine increased slightly notwithstanding the storage temperature. Sucrose content slightly decreased, but glucose and fructose tended to increase in garlic stored at $-18^{\circ}C$. The content of pyruvic acid, degradation product of alliin, did not change during storage at both storage temperatures. These results indicated that peeled garlic could be stored at $-18^{\circ}C$ for longer than 15 months without quality problems.

Keywords

frozen garlic;quality changes;texture;drip loss;flavor compounds