Baryon and Antibaryon production at RHIC energies in the Dual Parton Model

We compute the mid-rapidity densities of pions, kaons, baryons and antibaryons in $Au$--$Au$ collisions at $\sqrt{s}$ = 130 GeV in the Dual Parton Model supplemented with final state interactions, and we present a comparison with available data.Comment: 4 pages, 2 figures. Talk given at XXXVII Rencontres de Moriond, Les Arcs, France, March 200

Applications and Sexual Version of a Simple Model for Biological Ageing

We use a simple model for biological ageing to study the mortality of the population, obtaining a good agreement with the Gompertz law. We also simulate the same model on a square lattice, considering different strategies of parental care. The results are in agreement with those obtained earlier with the more complicated Penna model for biological ageing. Finally, we present the sexual version of this simple model.Comment: For Int.J.Mod.Phys.C Dec. 2001; 11 pages including 6 fig

Charged Multiplicities at SPS and RHIC and consequences for J/ψJ/\psi suppression

Hadron multiplicities in nucleus--nucleus interactions are calculated in the Dual Parton Model and its dependence on the number of collisions and the number of participants is analyzed. Shadowing corrections are calculated as a function of impact parameter and the multiplicity per participant as a funtion of centrality is found to be in agreement with experiment at SPS and RHIC energies. The obtained results are used to compute the $J/\psi$ suppression in a comover approach.Comment: 4 pages, 4 postscript figures. Talk given at XXXVI Rencontres de Moriond, Les Arcs, France, March 200

J/psi suppression at SPS and RHIC in the comovers approach

The NA50 collaboration data on the $J/\psi$ suppression are compared with the results obtained in a comovers approach based on the Dual Parton Model (DPM). Predictions for the $J/\psi$ suppression versus the charged multiplicity - measured in the rapidity region of the dimuon trigger - are given for SPS and RHIC energies.Comment: 4 pages, contribution to QM200

Site-dependent hydrogenation on graphdiyne

Graphene is one of the most important materials in science today due to its unique and remarkable electronic, thermal and mechanical properties. However in its pristine state, graphene is a gapless semiconductor, what limits its use in transistor electronics. In part due to the revolution created by graphene in materials science, there is a renewed interest in other possible graphene-like two-dimensional structures. Examples of these structures are graphynes and graphdiynes, which are two-dimensional structures, composed of carbon atoms in sp2 and sp-hybridized states. Graphdiynes (benzenoid rings connecting two acetylenic groups) were recently synthesized and some of them are intrinsically nonzero gap systems. These systems can be easily hydrogenated and the relative level of hydrogenation can be used to tune the band gap values. We have investigated, using fully reactive molecular dynamics (ReaxFF), the structural and dynamics aspects of the hydrogenation mechanisms of graphdiyne membranes. Our results showed that the hydrogen bindings have different atom incorporation rates and that the hydrogenation patterns change in time in a very complex way. The formation of correlated domains reported to hydrogenated graphene is no longer observed in graphdiyne cases.Comment: Submitted to Carbo

On the Nonlinear Impulsive Ψ\Psi--Hilfer Fractional Differential Equations

In this paper, we consider the nonlinear $\Psi$-Hilfer impulsive fractional differential equation. Our main objective is to derive the formula for the solution and examine the existence and uniqueness of results. The acquired results are extended to the nonlocal $\Psi$-Hilfer impulsive fractional differential equation. We gave an applications to the outcomes we procured. Further, examples are provided in support of the results we got.Comment: 2

Syntrophic LCFA degradation: generating a high-energy carrier from low-energy metabolism

For many years the interest in anaerobic degradation of lipids and long-chain fatty acids (LCFA) focused on technology and process developments. Attention to the microbiology of LCFA conversion was boosted by results showing that high methane yields could be obtained during anaerobic degradation of LCFA. The principle pathway of LCFA degradation is through -oxidation, producing acetate and hydrogen. For this conversion to be thermodynamically feasible, in methanogenic environments, acetogenic LCFA-degrading bacteria have to cooperate in syntrophy with hydrogen-consuming archaea. DGGE fingerprinting and 16S rRNA gene sequencing showed the importance of Syntrophomonas-like bacteria during batch and continuous degradation of unsaturated and saturated LCFA. The 7 species described thus far with the ability to grow on LCFA (with more than 12 carbon atoms), all belong to the families Syntrophomonadaceae and Syntrophaceae and, among these, only 4 species have the capability of utilizing mono- and/or polyunsaturated LCFA. Syntrophomonas zehnderi is able to degrade a wide range of saturated and unsaturated LCFA (C4 to C18) and could be detected in sludge samples from fed-batch and continuous reactors degrading oleate (monounsaturated C18). Batch bioaugmentation assays showed that addition of S. zenhderi could improve methane recovery from LCFA. The molecular mechanisms of anaerobic-LCFA degradation by S. zehnderi are being further studied by proteomics and whole genome sequencing. Identifying the components involved in the conversion of unsaturated LCFA-conversion is of particular interest. Related to this, the microbiology of oleate to palmitate (saturated C16) conversion by mixed cultures is also being studied using stable isotope probing and metaproteomics

Preliminary results of aerial infrared surveys at Pisgah Crater, California

In-flight tests of airborne infrared scanners, and comparison with field reflectance dat