Applying several latest theoretical techniques, the empirical description of the interaction between the high-frequency Langmuir and the low-frequent ion-acoustic waves, derived mathematically by Zakharov’s non-dimensional (ZE) equation. These interactions are described in electromagnetic waves, plasma physics, signal processing through optical fibers, coastal engineering, and fluid dynamics. Three modern computing methods are being used to construct several solutions: the extended exp(

We explore the two quantum-wells correlations in two microcavities linked by a waveguide and leaking its photons to the external environment. Each microcavity contains quantum well (QW) and filled by a linear optical medium. We examine the effects of the physical parameters on the generation and robustness of the Bures-norm entanglement and the trace-norm measurementinduced non-locality correlation. The generations and the robustness of the Bures and tracedistance correlations depend crucially on the cavity-QW and fiber cavity couplings as well as on the optical linear medium density. The optical susceptibility, the spontaneous emission and the microcavity dissipation rates, in addition to the couplings of cavity-QW and the fiber-cavity control the regularity, amplitudes, and frequencies of the Bures and trace-distance correlations.

In this work, we explore the quantum-memory-assisted entropic uncertainty relation (QMA-EUR) and the entanglement concurrence for the long-range Ising (LRI) model in the presence of an arbitrarymagnetic field. The long-range interaction is considered as type of the Calogero–Moser interaction that is inversely proportional to the square of the distance between the spins. It is shown that the measurement’s uncertainty and the entanglement concurrence are extremely sensitive to the effects of the distance between spins, the magnitude, and the direction of the external magnetic field. The evaluation of the QMA-EUR is fully related to the entanglement concurrence in case of the LRI model. At larger distances between the spins, there is inflation in the measuring uncertainty due to the fragile entanglement between them. The evolutions of the entanglement and the uncertainty showonly similar dynamical characteristics in antiferromagnetic and ferromagnetic frames when the magnetic field is perpendicular to the z-axis.

We investigate the link between quantum Fisher information (QFI) and quantum entanglement for a scheme of two atoms that interact with two non-degenerate modes in the absence and presence of intrinsic decoherence effect. The explicit form of the density matrix approach to the dissipative systems is given when the cavity-field is in generalized coherent states. The dynamical behavior of the QFI is compared with the atom–atom concurrence entanglement. We examine the effect of the dipole–dipole interaction and intrinsic decoherence on the dynamical properties of the QFI, concurrence and variance entropy squeezing. It is found that the atom–atom concurrence and the QFI can be controlled by the intrinsic decoherence and the dipole–dipole interaction.

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Fish infected with intestinal helminths or pathogenic bacteria can pose a serious risk of foodborne disease, threatening human and animal health, and require high attention. The current study investigates the diversity and composition of the microbiota in the midgut of rabbit fish Siganus rivulatus naturally infected with helminths. Six species of helminth parasites, including the digeneans Hexangium sigani and Gyliauchen volubilis, the acanthocephalans Sclerocollum rubrimaris and Neorhadinorhynchus macrospinosus, and the nematodes Procammalanus elatensis, and Ascaridoid larvae were recorded in the fish intestine. P. elatensis had the highest prevalence, occurring in 65% of infected fish; 72.2% of infected fish had concurrent infection with two or more helminth species. The total count of aerobic bacteria ranged from 1 to 305 colony-forming units (CFU)/g midgut contents. Four hydrolytic bacteria were recovered from the infected samples: Escherichia coli (ASU 31), Bacillus cereus (ASU 36) MN955553, Bacillus thuringiensis (ASU 34) MN955550, and Novosphingobium aromaticivorans (ASU 35) MN955552, which were identified using 16S rRNA genes. Bacterial richness was significantly correlated with concurrent parasitic infection and high content of extracellular hydrolytic amylases, proteases, cellulases, and lipases. The present results showed that the composition of the microbiota was affected by natural helminth infections in Siganus rivulatus, and the significant interaction between parasitic load and intestinal pathogenic bacteria, which may be primary in fish diseases etiology.

Fish infected with intestinal helminths or pathogenic bacteria can pose a serious risk of foodborne disease, threatening human and animal health, and require high attention. The current study investigates the diversity and composition of the microbiota in the midgut of rabbit fish Siganus rivulatus naturally infected with helminths. Six species of helminth parasites, including the digeneans Hexangium sigani and Gyliauchen volubilis, the acanthocephalans Sclerocollum rubrimaris and Neorhadinorhynchus macrospinosus, and the nematodes Procammalanus elatensis, and Ascaridoid larvae were recorded in the fish intestine. P. elatensis had the highest prevalence, occurring in 65% of infected fish; 72.2% of infected fish had concurrent infection with two or more helminth species. The total count of aerobic bacteria ranged from 1 to 305 colony-forming units (CFU)/g midgut contents. Four hydrolytic bacteria were recovered from the infected samples: Escherichia coli (ASU 31), Bacillus cereus (ASU 36) MN955553, Bacillus thuringiensis (ASU 34) MN955550, and Novosphingobium aromaticivorans (ASU 35) MN955552, which were identified using 16S rRNA genes. Bacterial richness was significantly correlated with concurrent parasitic infection and high content of extracellular hydrolytic amylases, proteases, cellulases, and lipases. The present results showed that the composition of the microbiota was affected by natural helminth infections in Siganus rivulatus, and the significant interaction between parasitic load and intestinal pathogenic bacteria, which may be primary in fish diseases etiology.

Rb-promoted nanocrystalline Co3O4-CeO2 catalysts were prepared by the impregnation of the Co3O4-CeO2, previously prepared using the solution combustion route, with an aqueous solution of Rb2CO3 (Rb/Co ratios 0.0125–0.20) and subsequent calcination at 500 °C. The obtained catalysts and the un-promoted Co3O4 and Co3O4-CeO2 catalysts have been characterized using XRD, FT-IR, SEM, TEM, XPS, H2-TPR and N2 physisorption techniques. The activity of the various catalysts was tested for N2O direct decomposition. All the Rb-promoted catalysts exhibited better performance than the bare Co3O4-CeO2 catalyst, where the highest activity was obtained using the catalyst with Rb/Co ratio of 0.025. The activity performance of the various catalysts was discussed in terms of the electronic properties modification accompanying the Rb-doping. For the optimum catalyst, further experiments were conducted

Rb-promoted nanocrystalline Co3O4-CeO2 catalysts were prepared by the impregnation of the Co3O4-CeO2, previously prepared using the solution combustion route, with an aqueous solution of Rb2CO3 (Rb/Co ratios 0.0125–0.20) and subsequent calcination at 500 °C. The obtained catalysts and the un-promoted Co3O4 and Co3O4-CeO2 catalysts have been characterized using XRD, FT-IR, SEM, TEM, XPS, H2-TPR and N2 physisorption techniques. The activity of the various catalysts was tested for N2O direct decomposition. All the Rb-promoted catalysts exhibited better performance than the bare Co3O4-CeO2 catalyst, where the highest activity was obtained using the catalyst with Rb/Co ratio of 0.025. The activity performance of the various catalysts was discussed in terms of the electronic properties modification accompanying the Rb-doping. For the optimum catalyst, further experiments were conducted

The electronic absorption spectra of 2-hydroxy-l,4-naphthoquinone (HNQ) in one- and two-component solvents are discussed. The visible absorption of this reagent has been shown to arise from a charge-transfer transition of the zwitterionic tautomer stabilized by a hydrogen bond donating solvent. The formation constant of the 1 : 1 hydrogen bonded complex with methanol, ethanol, and n-propanot has been determined at 25 °C from the spectral behaviour in mixed solvents. The tautomerization equilibrium of HNQ in aqueous ethanol is demonstrated and characterized. The dependence of the absorbance maximum of HNQ on the hydrogen bond donor ability of the solvent in the visible spectrum, as measured by the Taft-Kamlet ~ parameter, has been established. Experimentally derived evidence is supplied to justify the recommendation of HNQ as a novel probe for hydrogen bond donor ability in pure solvents and in mixed aqueous solvents.