The research project of winter jujube logistics preservation technology passed the evaluation of achievements

An irradiation research technology jointly completed by Northwest A&F University and Yangling Nusheng Irradiation Technology Co.
, Ltd.
can effectively extend the freshness period of winter dates and solve the problem
of short storage period of winter dates.
Recently, the technical research project passed the evaluation
of the results organized by the Shaanxi Forestry Society.
The expert group, led by researcher Gao Haiyan of the Institute of Food Science, Zhejiang Academy of Agricultural Sciences, believes that the project has innovation in the storage and preservation technology of electron accelerator X-ray treatment of winter jujube, which solves the problem of short and perishable storage period of winter jujube after harvest, and the overall technology has reached the international advanced level and has great
market potential.

As a reliable and efficient cold sterilization technology, irradiation has been widely used in food storage and processing
while ensuring food hygiene and safety, while causing less damage to its sensory and nutritional quality.
The rays that can be used for irradiation mainly include electron beams and X-rays generated by electron accelerators
.
Electron beam irradiation devices are safe, easy to operate, irradiate quickly, have a high degree of automation, low investment costs, and the application of this technology in the field of food preservation is expanding
with the improvement of accelerator equipment 。 Associate Professor Kou Liping, a member of the fruit and vegetable storage and processing team of Northwest A&F University, led the research group to jointly carry out the "Research on Winter Jujube Logistics Preservation Technology Based on Electron Accelerator X-ray Treatment" jointly carried out with Yangling Nusheng Irradiation Technology Co.
, Ltd.
, systematically analyzed the effects of high-energy electron beam treatment, X-ray treatment, simulated automobile vibration, etc.
on the storage quality of winter jujube, and formed the technical regulations
for the storage and preservation of winter jujube treated by electron accelerator X-ray.

The results showed that after X-ray treatment with an absorbed dose of 0.
3 thousand grays, winter dates could be stored at low temperature for 60 days, and the good fruit rate was 95%, which was 20% higher than that of the refrigerated control.
The shelf life of winter dates has been extended from 7-9 days to 10-12 days
.
The school-enterprise cooperation research also further revealed that electron accelerator X-ray treatment provides a theoretical basis
for the preservation of winter jujube by inhibiting the activity of key enzymes in anthocyanin synthesis, reducing the degradation of pectin and cellulose, delaying the redness of the low-temperature storage process of winter jujube and softening at room temperature.

Winter jujube is rich in vitamin C and is widely planted in Shandong, Hebei, Shaanxi, Henan and other places in China, with an existing planting area of about 2 million mu and an annual output of more than 5 million tons
.
Experts said that this irradiation technology will better help the development of the
winter date industry.

China Food News(December 27, 2022, Version 06)

(Responsible editor: Gao Jiaodi)