Synergistic Behavior of Polyethyleneimine and Epoxy Monomers Loaded in Mesoporous Silica as a Corrosion-Resistant Self-Healing Epoxy Coating.

Corrosion is a significant problem and is, to a large extent, responsible for the degradation of metallic parts. In this direction, mesoporous silica particles (MSPs) were synthesized by a sol-gel technique and had an average pore diameter of ∼6.82 nm.

Development and Properties of Polymeric Nanocomposite Coatings.

Polymeric-based nanocomposite coatings were synthesized by reinforcing epoxy matrix with titanium nanotubes (TNTs) loaded with dodecylamine (DOC). The performance of the developed nanocomposite coatings was investigated in corrosive environments to evaluate their anti-corrosion properties. The SEM/TEM, TGA, and FTIR analysis confirm the loading of the DOC into the TNTs.

Using B₄C Nanoparticles to Enhance Thermal and Mechanical Response of Aluminum.

In this work, Al-B₄C nanocomposites were produced by microwave sintering and followed by hot extrusion processes. The influence of ceramic reinforcement (B₄C) nanoparticles on the physical, microstructural, mechanical, and thermal characteristics of the extruded Al-B₄C nanocomposites was investigated. It was observed that the density decreased and porosity increased with an increase in B₄C content in aluminum matrix.

Reasons for disclosure of gender to pregnant women during prenatal ultrasonography.

Background: The objective of this study was to determine the proportion of women who want to know fetal gender on antenatal ultrasonography and the reasons behind this.

Methods: A descriptive, cross-sectional study was carried out between March 10, 2012 and September 10, 2012 at two tertiary care hospitals (Dow University Hospital, Ojha Campus, and Lady Dufferin Hospital) in Karachi. In total, 223 pregnant women who attended the antenatal clinic and gave their consent were included in the study.