Plants respond to changes of nutrient availability in the soil by modulating their root system developmental plan. This response is mediated by systemic changes of the nutritional status and/or by local perception of specific signals. The effect of nitrate on Arabidopsis (Arabidopsis thaliana) root development represents a paradigm of these responses, and nitrate transporters are involved both ...

Abstract Bioretention cells alleviate stormwater toxicity by permeation through soil media. Amending bioretention materials may result in increased chemical pollutant removal while maintaining hydraulic properties. Zeolite was tested media for zinc, copper, phosphorus, ammonium, and nitrate from synthetic a column study. Ecolite did not improve metal or phosphorus removal; however, significantl...

Ammonium is a toxic waste product that has been reported to negatively inhibit cell growth and recombinant glycosylation in Chinese hamster ovary (CHO) cells; however, the effect of this toxicity on intracellular gene expression has received only limited investigation. We used a differential display method to identify genes in CHO cells that were affected by ammonium stress. Eight genes whose m...

the aim of this study was to develop a derivative of chitosan as pharmaceutical excipient used in sustained-release matrix tablets of poorly soluble drugs. a water-soluble quaternary ammonium carboxymethylchitosan was synthesized by a two-step reaction with carboxymethylchitosan (cmcts), decylalkyl dimethyl ammonium and epichlorohydrin. the elemental analysis showed that the target product with...

Quaternary ammonium functionalized polyhedral oligomeric silsesquioxane (OctaAmmonium-POSS) units, widely employed as additives in ceramic and polymeric systems, possess many attributes which make them attractive as biocompatible drug carriers: nanoscale size, three-dimensional functionality, efficient cellular uptake, low toxicity, and high solubility.

Lettuce has a predisposition to nitrate accumulation and led many researchers develop research reduce this accumulation. The objective of study was evaluate the effect concentration (NO3-) nitrate/ammonium ratio (NO3-:NH4+) on growth, production these nitrogen compounds in lettuce grown hydroponic system southern Amazon. There were performed two experiments with Iceberg type, floating-hydroponi...