A modified PAMPA (parallel artificial membrane permeability assay) is proposed for evaluating the passive cuticular membrane permeability of potassium in several foliar nutrient formulations. The modified PAMPA can measure the passive permeability of ionic nutrients under fully hydrated conditions through an artificial membrane designed to more closely resemble a plant cuticle, rather than the traditional phospholipid animal model. Foliar nutrient formulations, which in some cases contain a complex organic matter component, may be evaluated with the modified PAMPA in order to develop better structure activity relationships that can help guide rational formulation development. In addition, mechanistic insights may also be uncovered with the simplified system.

中文翻译：

---

用平行人工膜通透性测定法测量钾的被动表皮膜通透性及其对叶面营养素配方的影响

提出了一种改良的PAMPA（平行人工膜通透性测定），用于评估几种叶面营养配方中钾的被动表皮膜通透性。改性的PAMPA可以通过完全类似于植物角质层的人造膜而不是传统的磷脂动物模型，在完全水合的条件下测量离子养分的被动渗透性。某些情况下包含复杂有机物质成分的叶面营养配方可以通过修饰的PAMPA进行评估，以开发出更好的结构活性关系，从而有助于指导合理配方的开发。此外，简化的系统还可以发现机械的见解。