Bruise and Respiration Characteristics of Citrus Unshiu as Related to Material Handling and In-transit Injury
1967 Volume 29 Issue 2 Pages 104-108,103
Details
1967 Volume 29 Issue 2 Pages 104-108,103
The effects of mechanical forces on the epidermis bruise and respiration of Citrus Unshiu during the handling and transport were studied, and the following results were obtained:
1. Epidermis bruise of Citrus Unshiu on each process of sorting machinery was investigated by using T. T. C solution. The bruise curve riled in accordance with the passing of processing, especially at the parts of 1-2, 6-7, and 8-9 as shown in Fig. 1. (cf. Fig. 4).
2. The effect of various sort of load on the epidermis bruise of Citrus Unshiu was compared.
(1) The bruise due to the rolling of Citrus Unshiu accompanied with compressing load increased with the compressing load and diminished inversely with the degree of warming fruit. (cf. Fig. 5-(2)).
(2) The bruise increased with the height of falling from 15 to 115cm, and diminished inversely with the degrees of curing (diminishing water content of epidermis from 2 to 6 percent). (cf. Fig. 5-(1) (3)).
(3) The bruise increased with the vibratory acceleration of G. (cf. Fig. 6).
3. The effect of mechanical stimulation on the respiration of Citrus Unshiu (co2 content of respiration) was investigated by using Infrared Gas Awalyzey (Type EIA-1).
(1) Max value of co2 is reached so sooner as the Citrus Unshiuis dropped on the harder recei ving receptacle made of concrete, wood, corruga ted cardboard, and Citrus Unshiu in the order. (cf. Fig. 7).
(2) The stimulation due to the combination of vibratory acceleration (0.2 to 0.8G) and vibrating period (5 to 20min) resulted in a little change on the respiration. (of. Fig. 8-(1)).
(3) The kind of mechanical stimulation effected much on the respiration of Citrus Unshiu.
The one reached to inner flesh resulted in remarkable increase of co2, while the one acting on an outer epidermis only resulted a little. (cf. Fig. 8-(2)).
(4) The degree of respiration due to the rolling of Citrus Unshiu accompanied with compressing load, showed a remarkable increase with the repeat of rolling and compressing load. (cf. Fig. 8-(3), (4)).
