The gut microbiota structure of the terrestrial isopod Porcellionides pruinosus (Isopoda: Oniscidea)

We used a combination of culture-dependent and independent approaches to study in depth the microbial community associated with the digestive tract of the terrestrial isopod Porcellionides pruinosus (Brandt, 1833). Specimens from different sampling sites in Tunisia harbored distinct microbiota profiles indicating the impact of both host origin and environmental factors on shaping the microbial flora within P. pruinosus. Our results revealed unexpected bacterial diversity especially via metagenomic analysis; a total of 819 operational taxonomic units (OTUs) assigned to two major bacterial phyla; Proteobacteria and Bacteroidetes. We used Nutrient Agar to isolate the cultivable fraction of bacteria associated with the gut of three geographically distant populations of P. pruinosus. The isolated bacteria belong to Actinobacteria, Firmicutes and Proteobacteria. Enrichment cultures on carboxymethylcellulose (CMC) medium gave evidence that the gut of this Oniscidea harbors cellulolytic Firmicutes and Proteobacteria probably involved in the lignocellulose degradation and then in mediating the functional role of terrestrial isopods as litter decomposers and regulators of nutrient cycling in soil ecosystems

Effet des mycorhizes à vésicules et arbuscules sur la croissance et la nutrition de l'arganier (Argania spinosa L.)

La présente étude démontre la possibilité d’inoculer artificiellement des plants d’arganier avec des mycorhizes à vésicules et arbuscules. L’inoculation des plants issus de semis a été effectuée par deux souches de Glomus sp1 et sp2. Après 4 mois de culture sous serre, le taux d’infection des racines a atteint 70%. La symbiose mycorhizienne par la souche sp1 a eu lieu un mois plutôt que celle de la souche sp2. Le gain en biomasse sèche était de 120% pour les parties aériennes et de 70% pour les parties racinaires. L’analyse du profil minéral des plants inoculés a montré une augmentation significative des concentrations de P, K, Ca, Mn et Cu par rapport au témoin. L’importance de ces résultats sur la réhabilitation des zones arides est discutée

Comment on "First Observation of Ground State Dineutron Decay: 16Be"

A recent measurement [Spyrou et al., PRL 108, 102501 (2012)] of the in-flight decay of 16Be into 14Be+n+n has been interpreted as the first case of dineutron emission. Here we point out that the inclusion of the n-n interaction neglected in the description of the direct three-body decay can generate strong enhancements at low n-n relative energy and angle, as observed, without any need to invoke dineutron decay.Comment: Final version, published in Physical Review Letter

The impact of the religious order on the political practice in morocco: the case of the alternation

La cultura del consenso, peculiaridad propia de la cultura política marroquí fruto de la conciliación entre dos tipos de legitimidades diametralmente opuestas (religiosa y laica), va a dar a los diferentes conceptos e instrumentos de la práctica política y del ejercicio del poder una connotación propia y singular en relación con los conocidos conceptos tanto en ciencia política y en derecho constitucional por un lado, como en la práctica política de los países occidentales del otro: separación de poderes, monarquía parlamentaria, constitución, partidos políticos, elecciones, oposición... etc. La alternancia de su lado no escapará a esta norma fundadora de la especificidad de la excepción marroquí.The culture of consensus, a particularity specific to the Moroccan political culture resulting from the conciliation between two diametrically opposed types of legitimacy (religious and secular), will give the different concepts and tools of political practice and the exercise of power a genuine and unique connotation compared to that known both in political science and constitutional law on the one hand, and in the political practice of Western countries on the other: separation of powers, parliamentary monarchy, constitution, political parties, elections, opposition ... etc. Alternation, as well will not escape from this founding rule on which the specificity of the Moroccan exception is based.Universidad Pablo de Olavid

Prolate-Spherical Shape Coexistence at N=28 in 44^{44}S

The structure of $^{44}$S has been studied using delayed $\gamma$ and electron spectroscopy at \textsc{ganil}. The decay rates of the 0$^+_2$ isomeric state to the 2$^+_1$ and 0$^+_1$ states have been measured for the first time, leading to a reduced transition probability B(E2~:~2$^{+}_1$$\rightarrow$0$^{+}_2)$= 8.4(26)~e$^2$fm$^4$ and a monopole strength $\rho^2$(E0~:~0$^{+}_2$$\rightarrow$0$^{+}_1)$ =~8.7(7)$\times$10$^{-3}$. Comparisons to shell model calculations point towards prolate-spherical shape coexistence and a phenomenological two level mixing model is used to extract a weak mixing between the two configurations.Comment: 5 pages, 3 figures, accepted for publication in Physical Review Letter

The beta-decay of 22Al

In an experiment performed at the LISE3 facility of GANIL, we studied the decay of 22Al produced by the fragmentation of a 36Ar primary beam. A beta-decay half-life of 91.1 +- 0.5 ms was measured. The beta-delayed one- and two-proton emission as well as beta-alpha and beta-delayed gamma decays were measured and allowed us to establish a partial decay scheme for this nucleus. New levels were determined in the daughter nucleus 22Mg. The comparison with model calculations strongly favours a spin-parity of 4+ for the ground state of 22Al

Numerical approximation of the generalized regularized long wave equation using Petrov–Galerkin finite element method

The generalized regularized long wave (GRLW) equation has been developed to model a variety of physical phenomena such as ion-acoustic and magnetohydro dynamic waves in plasma,nonlinear transverse waves in shallow water and phonon packets in nonlinear crystals. This paper aims to develop andanalyze a powerful numerical scheme for the nonlinear GRLWequation by Petrov–Galerkin method in which the elementshape functions are cubic and weight functions are quadratic B-splines. The proposed method is implemented to three ref-erence problems involving propagation of the single solitarywave, interaction of two solitary waves and evolution of solitons with the Maxwellian initial condition. The variational for-mulation and semi-discrete Galerkin scheme of the equation are firstly constituted. We estimate rate of convergence of such an approximation. Using Fourier stability analysis of thelinearized scheme we show that the scheme is uncondition-ally stable. To verify practicality and robustness of the new scheme error norms L2, L∞ and three invariants I1, I2,and I3 are calculated. The computed numerical results are compared with other published results and confirmed to be precise and effective