Studies on the In-transit Injury of Farm Egg

Effect of vibration on the later grade reduction of farm egg

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.
1. The effects of vibrational acceleration on the later grade reduction were measured.
(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).
(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).
(3) Decreasing gradient of the line of albumenindex and yolk-index does not show remarkable difference due to g (cf. Fig2-4).
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.
(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).
(2) Albumen and yolk index decreased with vibrating time (cf. Fig3-2).
(3) Air-cell-diameter expanded with vibrating time, remarkably from 10 to 20min. (cf. Fig3-3).
3. The effects of egg-temperature as vibrated on the later grade reduction were measured.
Low temperature of egg as vibrated diminished both the later weight loss and the expansion of air-cell (cf. Fig4).
4. The effects of storage conditions after vibrated on the later grade reduction were measured.
(1) Moisture loss, albumen and yolk index and air-cell-diameter are much influenced by storage temperature and wrapping conditions (cf. Fig5-1.3).
Polyethylene-wrapped products accompanied with low temperature as 4°C are effective for long preservation (Fig5-2).
(2) Eggs preserved by 15°C, unwrapped, reached to the amount of dripping of albumen by 24c.c, in 14 days.
5. The value of CO₂ occurrence from egg by respiration increased with vibrational acceleration excepting 0.8g.
Higher value of CO₂ occurrence lasted as accelerated by larger g (cf. Fig6).
6. The value of g on each of the combined vessel, flats and eggs showed the same as vibrated by acceleration.
Egg is seemed to absorb the effect of vibration of 0.8g. (cf. Fig7).