In this study, high voltage atmospheric cold plasma (HVACP) with different working gases (air, Ar, He and N₂) was used to modify the surface of tomato pomace, aiming to facilitate the migration of phenolic compounds during extraction hence increase their extraction efficiency. In addition to rupturing the epidermal cells of tomato pomace, HVACP treatments were found to decrease the water contact angle of tomato peels and accelerate the drying of tomato fruit, indicating that the treated surfaces were more hydrophilic. Tomato pomace treated by He and N₂ plasmas showed increased extraction yields of phenolic compounds by nearly 10%, and all HVACP treatments increased the antioxidant capacity of tomato pomace extracts and slightly changed the concentration profile of their phenolic compounds. The developed HVACP pretreatment technology is a promising method for valorizing tomato processing byproducts with high nutritional values.

Industrial relevance

Tomato pomace is a good source of phenolic compounds, however, the huge amount generated from commercial tomato processing has caused a severe waste problem. Conventional extraction methods for phenolic compounds are generally time-consuming with intensive use of organic solvents that are thus considered not environment-friendly. This new cold plasma pretreatment method can not only help mitigate the environmental burdens associated with agricultural waste management but also convert waste into value-added functional food ingredients and neutraceuticals in a more efficient way.

中文翻译：

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开发冷等离子体预处理以提高番茄渣中酚类物质的提取率

在这项研究中，使用具有不同工作气体（空气，Ar，He和N ₂）的高压大气冷等离子体（HVACP）来修饰番茄渣的表面，旨在促进提取过程中酚类化合物的迁移，从而增加其提取率效率。除了破坏番茄果皮的表皮细胞外，还发现HVACP处理可减少番茄皮的水接触角并加速番茄果实的干燥，这表明处理后的表面更具亲水性。He和N ₂处理的番茄渣血浆显示酚类化合物的提取率提高了近10％，所有HVACP处理均提高了番茄渣提取物的抗氧化能力，并略微改变了其酚类化合物的浓度曲线。先进的HVACP预处理技术是一种具有高营养价值的增值番茄加工副产品的有前途的方法。

行业相关性

番茄渣是酚类化合物的良好来源，但是，商业番茄加工过程中产生的大量番茄酱造成了严重的废物问题。酚类化合物的常规提取方法通常是费时的，因为大量使用有机溶剂，因此被认为对环境不友好。这种新的冷等离子体预处理方法不仅可以帮助减轻与农业废物管理相关的环境负担，而且可以以更有效的方式将废物转化为增值的功能性食品成分和营养保健品。