电液流光放电等离子强化链格孢菌种子灭菌消毒,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

电液流光放电等离子强化链格孢菌种子灭菌消毒
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-12 , DOI: 10.1021/acsami.1c10771
Sawita Suwannarat ₁ , Chayaporn Thammaniphit ₂ , Siwapon Srisonphan ₂

Affiliation

作为新兴的无化学和环保技术，非热（气体放电）等离子体和（液相）等离子体活化水 (PAW) 为生物、医疗、环境和农业应用提供了卓越的微生物消毒解决方案。在此，我们提出了电液流光放电等离子体 (ESDP)，它结合了流光放电等离子体 (SDP) 和在气液界面产生的 PAW，用于对受链格孢菌( A. brasicicola ) 污染的羽衣甘蓝 ( Brassica oleracea var. alboglabra) 种子进行消毒。）。结果表明，经 ESDP 处理的A. brasicicola接种的种子可减少约 75% 的A. brasicicola（事件百分比）与未处理的种子相比。同样，经等离子体处理的种子的健康幼苗百分比显着提高至~70%，而未处理种子的健康幼苗百分比保持在~15%。进行了显微镜检查，证实 ESDP 会损坏A. brasicicola孢子附着在羽衣甘蓝种子上，处理后导致严重的形态异常。此外，还进行了电场模拟，结果表明，种子表面边界的液-气界面处的强局域电场引发了气-液界面处气体的局部击穿，导致了异常的物理-化学反应超越典型等离子治疗的抗菌功效。此外，光发射光谱和物理化学性质（pH、电导率和氧化还原电位）表明，失活主要与液相和气相中的活性氧-氮物种有关。我们相信，当在食品、农业和医疗行业的液体界面上使用放电等离子体时，这项工作非常有趣。

"点击查看英文标题和摘要"

Electrohydraulic Streamer Discharge Plasma-Enhanced Alternaria brassicicola Disinfection in Seed Sterilization

As emerging chemical-free and eco-friendly technologies, nonthermal (gas discharge) plasma and (liquid phase) plasma-activated water (PAW) offer exceptional microbial disinfection solutions for biological, medical, environmental, and agricultural applications. Herein, we present electrohydraulic streamer discharge plasma (ESDP), which combines streamer discharge plasma (SDP) and PAW generated at a gas–liquid interface, to sterilize Chinese kale (Brassica oleracea var. alboglabra) seeds contaminated with Alternaria brassicicola (A. brassicicola). The results showed that the ESDP treatment of A. brassicicola-inoculated seeds provides a ∼75% reduction of A. brassicicola (incident percentage) compared with nontreated seeds. Likewise, the healthy seedling percentage of the plasma-treated seeds was significantly improved to ∼70%, while that of the nontreated seeds remained at ∼15%. A microscopic examination was performed, and it confirmed that ESDP can damage the A. brassicicola spores attached to Chinese kale seeds and lead to severe morphological abnormalities after treatment. Also, an electric field simulation was performed, and it indicated that the strongly localized electric field at the liquid–gas interface on the seed surface boundary had initiated local breakdown of the gas at the air–liquid interface, resulting in exceptional physical–chemical reactions for antimicrobial efficacy beyond typical plasma treatments. Moreover, the optical emission spectra and physicochemical properties (pH, conductivity, and oxidation–reduction potential) showed that inactivation is mainly associated with the reactive oxygen–nitrogen species in the liquid and gas phases. We believe that this work is of great interest when using electrical discharge plasma on liquid interfaces in food, agricultural, and medical industries.

更新日期：2021-09-22

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南