Applied Science Private University

About: Applied Science Private University is a education organization based out in Amman, Jordan. It is known for research contribution in the topics: Catalysis & Population. The organization has 4124 authors who have published 5299 publications receiving 116167 citations.

Potential of a Novel Protein, OMP26, from Nontypeable Haemophilus influenzae To Enhance Pulmonary Clearance in a Rat Model

Abstract: A major outer membrane protein band of approximately 25 to 27 kDa is commonly observed in strains of Haemophilus influenzae. This study has investigated the potential of a 26-kDa protein (OMP26) from nontypeable H. influenzae (NTHI) as a vaccine candidate. OMP26 was used to immunize rats via intestinal Peyer's patches, followed by an intratracheal boost. Immunization was found to significantly enhance bacterial clearance following pulmonary challenge with both the homologous NTHI strain and a different NTHI strain. Significant levels of anti-OMP26 were found in the serum and bronchoalveolar lavage from immunized rats, and isotypes of immunoglobulin G (IgG) were also measured in serum. Analysis of IgG isotypes present in serum following OMP26-immunization suggest that predominantly a T-helper 1-type response was induced. The OMP26 protein was amino-terminally sequenced and found to have no homology with the P5 of H. influenzae type b P5 or the fimbrin protein of NTHI, both can migrate upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis at similar molecular masses but OMP26 has 100% homology with a segment of the H. influenzae Rd genome. The results of this study suggest that OMP26 may be a suitable vaccine candidate against NTHI infection and warrants continued investigation and characterization.

Optimal Query Processing for Distributed Database Systems

Abstract: A model is developed for determining the optimal policy for processing a given relational model query. The model is based on operating cost (processing cost and communication cost), which is a function of selection of sites for processing query operations, sequence of operations, file size, and data reduction functions. The optimal policy specifies the site selection and sequence of operations that yield minimum operating cost.

Role of the Ce valence in the coexistence of superconductivity and ferromagnetism of CeO 1 − x F x BiS 2 revealed by Ce L 3 -edge x-ray absorption spectroscopy

Abstract: We have performed Ce ${L}_{3}$-edge x-ray absorption spectroscopy (XAS) measurements on ${\mathrm{CeO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}{\mathrm{BiS}}_{2}$, in which the superconductivity of the BiS${}_{2}$ layer and the ferromagnetism of the ${\mathrm{CeO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}$ layer are induced by the F doping, in order to investigate the impact of the F doping on the local electronic and lattice structures. The Ce ${L}_{3}$-edge XAS spectrum of CeOBiS${}_{2}$ exhibits coexistence of $4{f}^{1}$ (Ce${}^{3+}$) and $4{f}^{0}$ (Ce${}^{4+}$) state transitions revealing Ce mixed valency in this system. The spectral weight of the $4{f}^{0}$ state decreases with the F doping and completely disappears for $xg0.4$ where the system shows the superconductivity and the ferromagnetism. The results suggest that suppression of the Ce-S-Bi coupling channel by the F doping appears to drive the system from the valence fluctuation regime to the Kondo-like regime, leading to the coexistence of the superconducting BiS${}_{2}$ layer and the ferromagnetic ${\mathrm{CeO}}_{1\ensuremath{-}x}{\mathrm{F}}_{x}$ layer.

Dispersion due to combined pressure-driven and electro-osmotic flows in a channel surrounded by a permeable porous medium

Abstract: The combined electro-osmotic and pressure-driven flows (PDFs) have pronounced impacts on the solute transport in permeable porous media, particularly mixing and separation processes. However, the relationship between the physical properties of the permeable porous media and the combined electro-osmotic and PDFs still needs further investigation. This study focuses on the transport of a neutral nonreacting solute in a channel with permeable porous walls under the combined effects of electro-osmotic and PDFs. With the aid of perturbation theory and asymptotic analysis, the equivalent one-dimensional equations governing the solute concentrations in the channel and permeable porous medium under the combined velocity are derived. Based on this, an exact analytical expression relating the dispersion coefficient with the physical properties of the permeable porous medium and the combined flow is obtained. The model parameters exerting the most influence on the results are identified through sensitivity analysis. The proposed model is compared and validated with several previously developed models in the literature. The findings of this study can pave the way for the quantitatively design of solute transport through microporous coatings and porous microfluidic membranes.