Hassine Hadj Mabrouk

Learn More
To streamline and strengthen the process of acquisition, representation and exploitation of scenarii of railroad accidents, it is necessary to harmonize and standardize the terminology used by domain experts. The research aims to significantly improve analytical activities and operations of the various safety studies, by tracking the error in system,(More)
This study investigated the role of N, P and Si enrichments on phytoplankton in the Bizerte Lagoon (southwestern Mediterranean Sea, Tunisia) during March, June, August, October and December 2004. Polycarbonate bottles were enriched with different nutrients according to four treatments N:Si:P ratios [+NSi/-P (40:40:1), +P/-NSi (20:20:2,5), +NP/-Si (16:0:1)(More)
In this study, metal contamination experiments were conducted to investigate the effects of copper and cadmium on the growth of the marine toxic dinoflagellate Alexandrium catenella and on the production of dissolved organic matter (Dissolved Organic Carbon: DOC; Fluorescent Dissolved Organic Matter: FDOM). This species was exposed to increasing(More)
Some species of the genus Alexandrium are known as potential producers of saxitoxin, a neurotoxin that causes the paralytic shellfish poisoning (PSP) syndrome. Blooming of these species, especially in shellfish farms can affect the aquaculture production and harm human health. Seasonal dynamics of Alexandrium spp. abundance in relationship to environmental(More)
In a laboratory study, metal contamination experiments were conducted to investigate the effects of two free copper concentrations (10−9 and 10−8 M) on cell growth and on dissolved organic matter exudation by a marine diatom Skeletonema costatum. Throughout incubation, the growth kinetics and exudation of extracellular molecules (i.e. dissolved organic(More)
Several ultrastructural cytochemical methods are used to determine the constituents of the ripe nucleus of Equisetum arvense L. They show that: DNA, associated with an arginine-rich histone, is localized in central region of the nucleus; nucleoplasm is reduced to a thin peripheral coat and contains a probably lysine rich histone; RNA is not detectable; non(More)
The toxicity of benz(a)anthracene and fluoranthene (polycyclic aromatic hydrocarbons, PAHs) was evaluated on seven species of marine algae in culture belonging to pico-, nano-, and microphytoplankton, exposed to increasing concentrations of up to 2 mg L(-1). The short-term (24h) toxicity was assessed using chlorophyll a fluorescence transients, linked to(More)
  • 1