@article{oai:niigata-u.repo.nii.ac.jp:00028367,
 author = {黒坂, 俊 and 知野, 秀次 and 太田, 祐樹 and 齋藤, 洋太郎 and 坂井, 優 and 児島, 清秀},
 issue = {2},
 journal = {新潟大学農学部研究報告, 新潟大学農学部研究報告},
 month = {Mar},
 note = {MA包装したニホンナシ（Pyrus pyrifolia Nakai）‘幸水’、‘新高’および‘新興’果実の共鳴周波数を果実硬度測定装置（Vp-2，生物振動研究所）で経時的に測定した。さらに、共鳴周波数と果実重から弾性指標を算出し、貯蔵中の果実の弾性指標の経時的変化を示した。収穫時の‘幸水’果実の第2共鳴周波数は680Hzであり、‘新高’および‘新興’果実の第3共鳴周波数は852Hzおよび841Hzであった。さらに、収穫時の‘幸水’果実の第2共鳴周波数から算出した弾性指標は約22であり、収穫時の‘新高’および‘新興’果実の第3共鳴周波数から算出した弾性指標は約56および49であった。3品種それぞれの弾性指標は貯蔵期間中に低下したことから、弾性指標がニホンナシ果実の新たな熟度指標となる可能性が示唆された。果実のMA包装は果皮の黒変（‘新高’）、貯蔵病害の発生（‘新興’）ならびに果肉の水浸状化（‘幸水’および‘新興’）を助長した。また、MA包装によって果実の水分消失が抑制されており、弾性指標の低下も同様に抑制されていることから、ニホンナシ果実の弾性指標の低下には水分消失が関与すると示唆された。, We monitored the resonant frequencies of modified atmosphere packaged Japanese pear（Pyrus pyrifolia Nakai）'Kosui', 'Niitaka' and 'Shinko' fruits after harvest with a nondestructive measurement device (Vp-2, Applied Vibro-Acoustics. Inc.) with time. Moreover, we calculated the elasticity indexes from resonant frequencies and fruit weights and, showed the timecourse change in the elasticity index of fruits during storage. The second resonant frequency of 'Kosui' fruits at harvest was 680 Hz and the third resonant frequencies of 'Niitaka' and 'Shinko' fruits at harvest were 852 Hz and 841 Hz, respectively. Moreover, the elasticity index calculated from the second resonant frequency of 'Kosui' fruit at harvest was approximately 22 and the elasticity indexes calculated from the third resonant frequencies of 'Niitaka' and 'Shinko' fruit at harvest were approximately 56 and 49, respectively. From the results that the elasticity indexes of these three cultivars decreased during storage, the possibility was suggested that the elasticity index could be used as a new maturity indicator of Japanese pear fruits. Modified atmosphere packaging of fruits helped the development of skin blackening ('Niitaka'), diseases attributed to storage ('Shinko'), and core breakdown ('Kosui' and 'Shinko'). However, the water loss from fruits was prohibited by modified atmosphere packaging, and the decrease of elasticity index was also prohibited. From these results, it was suggested that decrease of the elasticity index in Japanese pear fruit is related to the water loss.},
 pages = {81--87},
 title = {ニホンナシ‘幸水’、‘新高’および‘新興’におけるMA包装が果実貯蔵に及ぼす影響および貯蔵期間中の弾性指標のモニタリング},
 volume = {62},
 year = {2010}
}