From our theoretical treatment which is an extension of the classical Donnan theory, we have estimated the rational selectivity coefficients of the carboxylic groups of the walls during exchanges of divalent ions against monovalent ones (i.e. calcium and potassium or calcium and sodium ions). These coefficients express the interactions between the different ions, those between the counter-ions ...

Aminooxyacetate, a known inhibitor of transaminase reactions and glycine decarboxylase, promotes rapid depletion of the free pools of serine and aspartate in nitrate grown Lemna minor L. This compound markedly inhibits the methionine sulfoximine-induced accumulation of free ammonium ions and greatly restricts the methionine sulfoximine-induced depletion of amino acids such as glutamate, alanine...

The absorption of selenium (Se) from water by Lemna minor L. and the influence different concentrations forms Se on its biochemical morphological characteristics were studied. Plants exposed to various Se: 1 mg L−1, 2 L−1 5 in sodium selenite selenate solutions a combination (2 L−1) L−1). When was added form selenate, plants accumulated higher amounts compared selenite. Comparisons combined add...

To evaluate the relative toxicity and the occurrence patterns of pesticide mixtures in streams draining agricultural watersheds, a 3-step approach was used. First, a landscape of interest was identified, defined, and isolated. Second, the relative toxicity of mixtures, on the basis of pesticide toxicity index scores, was compared with the relative toxicity of the highest individual pesticide, o...

Flavonoids are a complex group of plant-made phenolic Background: compounds that are considered of high nutraceutical value. Their beneficial impacts on human health relate predominantly to their capacity to serve as antioxidants, thus protecting cells against the damaging impact of reactive oxygen species. Recent studies have also pointed at an essential role for flavonoids as antioxidants in ...

In this study, the epiphytic algae of Lemna minor collected from its natural habitat or grown in aquarium were analyzed for a period of six months from April 2016 to September 2016. While a total of 15 taxa, 1 belonging to Cyanophyta and 14 belonging to Bacillariophyta, were recorded for L. minor grown in aquarium, a total of 36 taxa, 3 belonging to Cyanophyta, 5 belonging to Chlorophyta, 1 bel...

Recent findings indicate that plant-root exudates can stimulate plant-associated microorganisms to enhance the biodegradation of contaminants in constructed wetlands. To understand this process, we studied root-exudation changes two aquatic plants (Lemna minor and Salvinia natans) upon micropollutants exposure (10, 100 1000 ?g/L mixes containing naproxen, diclofenac, carbamazepine, benzotriazol...