Studies on the In-transit Injury of Farm Egg

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  • 鶏卵の輸送損傷に関する研究
  • ケイラン ノ ユソウ ソンショウ ニ カンスル ケンキュウ カシンケイラン ノ ヒンシツ テイカ ニ ツイテ
  • Effect of vibration on the later grade reduction of farm egg
  • 加振鶏卵の品質低下について

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Abstract

The effècts of vibrational acceleration accompanied with the variety of environmental conditions on the later grade reduction of farm eggs were studied and the following results were obtained.<br>1. The effects of vibrational acceleration on the later grade reduction were measured.<br>(1) Weight loss during the storage increased with the value of g (vibrational acceleration) inflicted on an egg in the time of vibrating (cf. Fig2-1).<br>(2) Jarring by 1.0g for 20 minutes produced separation of the shell membrane from the egg membrane with consequent formation of a somewhat moval air cell in 5 days. (cf. Fig2-2).<br>(3) Decreasing gradient of the line of albumenindex and yolk-index does not show remarkable difference due to g (cf. Fig2-4).<br>2. The effects of vibrating time from 10 to 30min, on the later grade reduction of egg were measured, the value of g being fixed 0.4.<br>(1) Moisture loss of egg in the storage increased with vibrating time. Effect of vibration of 0.4g for 30min. equals to 0.6g for 20min. (cf. Fig3-1).<br>(2) Albumen and yolk index decreased with vibrating time (cf. Fig3-2).<br>(3) Air-cell-diameter expanded with vibrating time, remarkably from 10 to 20min. (cf. Fig3-3).<br>3. The effects of egg-temperature as vibrated on the later grade reduction were measured.<br>Low temperature of egg as vibrated diminished both the later weight loss and the expansion of air-cell (cf. Fig4).<br>4. The effects of storage conditions after vibrated on the later grade reduction were measured.<br>(1) Moisture loss, albumen and yolk index and air-cell-diameter are much influenced by storage temperature and wrapping conditions (cf. Fig5-1.3).<br>Polyethylene-wrapped products accompanied with low temperature as 4°C are effective for long preservation (Fig5-2).<br>(2) Eggs preserved by 15°C, unwrapped, reached to the amount of dripping of albumen by 24c.c, in 14 days.<br>5. The value of CO2 occurrence from egg by respiration increased with vibrational acceleration excepting 0.8g.<br>Higher value of CO2 occurrence lasted as accelerated by larger g (cf. Fig6).<br>6. The value of g on each of the combined vessel, flats and eggs showed the same as vibrated by acceleration.<br>Egg is seemed to absorb the effect of vibration of 0.8g. (cf. Fig7).

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