From energy-density functionals to mean field potentials: a systematic derivation

In this paper we present a systematic method to solve the variational problem of the derivation of a self-consistent Kohn-Sham field from an arbitrary local energy functional. We illustrate this formalism with an application in nuclear physics and give the general mean field associated to the widely used Skyrme effective interaction

Fermionic Molecular Dynamics for nuclear dynamics and thermodynamics

A new Fermionic Molecular Dynamics (FMD) model based on a Skyrme functional is proposed in this paper. After introducing the basic formalism, some first applications to nuclear structure and nuclear thermodynamics are presentedComment: 5 pages, Proceedings of the French-Japanese Symposium, September 2008. To be published in Int. J. of Mod. Phys.

Ising analogue to compact-star matter

By constructing an Ising analogue of compact-star matter at sub-saturation density we explored the effect of Coulomb frustration on the nuclear liquid-gas phase transition. Our conclusions is twofold. First, the range of temperatures where inhomogeneous phases form expands with increasing Coulomb-field strength. Second, within the approximation of uniform electron distribution, the limiting point upon which the phase-coexistence region ends does not exhibit any critical behaviour. Possible astrophysics consequences and thermodynamical connections are discussed.Comment: 4 pages, 3 figure

Factors Affecting Efficiency of Biosorption of Fe (III) and Zn (II) by Ulva lactuca and Corallina officinalis and Their Activated Carbons

The removal of heavy metals from industrial waste has become crucial in order to maintain water quality levels that are suitable for environmental and species reproductive health. The biosorption of Zn+2 and Fe+3 ions from aqueous solution was investigated using Ulva lactuca green algal biomass and Corallina officinalis red algal biomass, as well as their activated carbons. The effects of biosorbent dosage, pH, contact time, initial metal concentration, and temperature on biosorption were evaluated. The maximum monolayer capacity of Ulva lactuca and Corallina officinalis dry algal powder and algal activated carbon was reached at pH 5 and 3 for Zn+2 and Fe+3, respectively, while the other factors were similar for both algae, which were: contact time 120 min, adsorbent dose 1 g, temperature 40 C and initial concentrations of metal ion 50 mgL1. The batch experimental data can be modelled using the Langmuir and Freundlich isotherm models. Thermodynamic characteristics revealed that the adsorption process occurs naturally and is endothermic and spontaneous. For the adsorption of Zn+2 and Fe+3 ions, the value of G was found to be negative, confirming the practicality of the spontaneous adsorption process, which could be helpful for remediation in the era of temperature increase

Biodiversity Studies for Sustainable Lagoon: Thermophilic and Tropical Fish Species vs. Endemic Commercial Species at Mellah Lagoon (Mediterranean, Algeria)

Lagoons play an important socio-economic role and represent a precious natural heritage at risk from fishing pressure and chemical and biological pollution. Our research focused on better understanding the discrimination of fish biodiversity, the detection of non-indigenous species, and the valorization of commercial indigenous species at Mellah lagoon (Algeria). Taxonomic characterization and barcoding for all fish species and Inkscape schematic drawings for the most common species are provided. A total of 20 families and 37 species were recorded. The thermophilic species Coris julis, Thalassoma pavo, and Aphanius fasciatus and tropical species such as Gambusia holbrooki and Parablennius pilicornis were identified. Numerous Mediterranean species of socio-economic importance are highlighted, and detailed information is summarized for the lagoon’s sustainability. This short-term evaluation goes hand in hand with long-term programs documenting the interaction between indigenous and non-indigenous species in the lagoon and will allow the development of a provisional relationship model for future studies. Thermophilic and tropical species patterns in the Mellah lagoon are presented. Taken together, we provide useful data that can guide future investigations and may become a potential management tool for achieving the Sustainable Development Goals and protecting species with large socio-economic roles from potential thermal stress impact

Anomalous thermodynamics and phase transitions of neutron-star matter

In this letter we show that the presence of the long-range Coulomb force in dense stellar matter implies that the total charge cannot be associated with a chemical potential, even if it is a conserved quantity. As a further consequence, the analytical properties of the partition sum are modified, changing the order of the phase transitions and affecting the possible occurrence of critical behaviours. The peculiar thermodynamic properties of the system can be understood introducing a model hamiltonian in which each charge is independently neutralized by a uniform background of opposite charge.Comment: 4 pages - GANIL, LP

Etude comparative des huiles essentielles de six variétés des nouvelles obtentions d’agrumes cultivées au Maroc

In this research, the essential oils of six INRA’s citrus varieties, which are mandarines El Marzaka, El Mahdia, El Gharabaouia, El Hamra, El Maamoura and orange Shemsia were compared and analyzed. For this purpose, the oil yield, chemical composition, antioxidant and antimicrobial activity were investigated. The extraction was carried out by hydro-distillation. The highest essential oil yield was obtained for Shemsia (5,63%/ DW). The main components of essential oils were identified by GC-MS and their antioxidant activity was determined by DPPH method. The major component of essential oils is D-Limonene, and the highest antioxidant activity was obtained for Shemsia essential oil (24.02%). Antifungal activity was detected in all varieties and the highest value was identified in El Maamoura, while antibacterial activity was not distinguished. From the obtained results, we note that the essential oils of El Maamoura can be valued as a fungicide in agriculture or in medical field. in addition, El Hamra, can be used in Solar cream industry.Les huiles essentielles de six variétés d’agrumes obtenues de l’INRA du Maroc, et qui sont : les mandarines El Marzaka, El Mahdia, El Gharabaouia, El Hamra, El Maamoura et l’orange Shemsia ont été comparées et analysées. La comparaison a été effectuée en termes de rendement, de composition chimique, d’activité antioxydante et d’activité antimicrobienne de ces huiles essentielles. L’extraction a été effectuée par hydro-distillation. Le rendement en huile essentielle le plus élevé a été obtenu chez la variété Shemsia (5,63%/PS). Les principaux composants des huiles essentielles ont été identifiés par CPG-MS et leur activité antioxydante a été déterminée en testant la capacité de piégeage des radicaux libres par DPPH. Le composant majeur des huiles essentielles est le D-Limonène et la plus haute activité antioxydante a été obtenue pour l'huile essentielle d’El Maamoura (24,02%). L'activité antifongique a été détectée chez toutes les variétés et la valeur la plus élevée a été repérée chez El Maamoura, alors que l'activité antibactérienne n'a été détectée chez aucune variété. À partir des résultats obtenus, nous constatons que l’huile essentielle de la mandarine El Maamoura peut être valorisée sous forme de fongicide dans le domaine d’agriculture ou dans le domaine médical. En plus, la variété El Hamra peut être incorporée dans l’industrie de la fabrication des crèmes solaires