Effects of 405 nm light‐emitting diode treatment on microbial community on fresh‐cut pakchoi and antimicrobial action against Pseudomonas reinekei and Pseudomonas palleroniana

2021 ◽  
Author(s):  
Yuchen Zhang ◽  
Jing Xie
Keyword(s):  
Microbial Community ◽  
Light Emitting Diode ◽  
Antimicrobial Action ◽  
Light Emitting ◽  
Fresh Cut

Effect of 460 nm light emitting diode illumination on survival of Salmonella spp. on fresh-cut pineapples at different irradiances and temperatures

2017 ◽  
Vol 196 ◽  
pp. 130-138 ◽  
Author(s):  
Vinayak Ghate ◽  
Amit Kumar ◽  
Min-Jeong Kim ◽  
Woo-Suk Bang ◽  
Weibiao Zhou ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Salmonella Spp ◽  
Light Emitting ◽  
Fresh Cut

The effect of red and violet light emitting diode (LED) treatments on the postharvest quality and biodiversity of fresh-cut pakchoi (Brassica rapa L. Chinensis)

2021 ◽  
pp. 108201322110188
Author(s):  
Yuchen Zhang ◽  
Jing Xie
Keyword(s):  
Antioxidant Enzymes ◽  
Shelf Life ◽  
Brassica Rapa ◽  
High Throughput ◽  
High Throughput Sequencing ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Violet Light ◽  
Fresh Cut ◽  
Led Irradiation

The effects of red and violet Light Emitting Diode (LED) irradiation on the quality changes of fresh cut pakchoi ( Brassica rapa L.Chinensis), such as water migration, soluble solids, chlorophyll, ASA, shelf life, antioxidant enzyme activity and changes of biodiversity were evaluated in this study using physicochemical and high-throughput sequencing analys. The results showed that red and violet LED irradiation (15 μ mol/(m2 · s)) (1) are significantly inhibited the changes of sensory evaluation, (2) increased the content of chlorophyll, ASA and antioxidant enzymes, and (3) prolonged the shelf life of pakchoi at 4 °C. Furthermore, through the using of high-throughput sequencing, aerobic plate count and the count of Pseudomonas spp ., it was found that (4) red and violet LED changed the microbial community structure among samples, and inhibited the reproduction of specific spoilage organism (SSO) in fresh cut pakchoi. At the same time, compared with the traditional sterilization method, the results showed that visible light sterilization was also effective. In general, the results showed that LED treatment was an effective way to delay the senescence and maintain the quality of the pakchoi by enhancing the activity of antioxidant enzymes and regulating chlorophyll and ASA metabolism, inhibited the reproduction of SSO.

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

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