ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

A new way to measure respiration.

Jobling, J. J.; Bower, J. H.; Patterson, B. D.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 15 Pages: 17-21 Ref: 3 ref.

1997

บทคัดย่อ

The respiration rate of fresh produce is usually measured using a flow-through system. However, much harvested fresh produce respires in closed or semi-closed systems. A respirometer which would mimic this situation was developed and is described. The produce is sealed inside a vessel whose atmosphere is monitored using O2 and CO2 sensors. The voltage outputs from the sensors are read by a desktop computer which calculates the respiratory rate and respiratory quotient. Data collection stops each time the O2 concentration reaches a preset minimum value. At this point air or some other gas mixture is flushed through the system until the O2 level rises to a preset maximum value. Flushing then stops and measurements begin again. This cycle can be repeated as many times as required. The method has a number of advantages. It is inherently more sensitive than a flow-through system and is less liable to certain systematic errors. The method allows the effect of different gas mixtures or temperature on r

espiration to be conveniently measured. Several respirometers can be monitored by a single PC. The size of the respirometer is easily varied and few specialised skills are required for its construction.