Association between health and safety perceptions of COVID-19 vaccine and its uptake in Ghana.

Background: Attitudes towards vaccines have affected COVID-19 vaccination programs in many countries. This study sought to evaluate the effects of general perceptions on the safety and health concerns and the confidence in COVID-19 vaccines on its uptake in Ghana.

Methods: A cross-sectional online survey was conducted between January and March 2021.

Examining the dynamics of the relationship between water pH and other water quality parameters in ground and surface water systems.

This study evaluated the relationship between water pH and the physicochemical properties of water while controlling for the influence of heavy metals and bacteriological factors using a nested logistic regression model. The study further sought to assess how these relationships are compared across confined water systems (ground water) and open water systems (surface water). Samples were collected from 100 groundwater and 132 surface water locations in the Tarkwa mining area.

Financial performance of hospitals: A critical obligation of corporate governance dimensions.

Background: This paper aims to investigate the effects of corporate governance mechanisms on the financial performance of hospitals. The statement, "good corporate governance" has been incorporated in the health care sector over the last decade, as an element to improve financial performance.

Methods: The researchers relied on both primary and secondary data in the study.

Bioactivity of nitric acid and calcium chloride treated carbon-fibers reinforced polyetheretherketone for dental implant.

Carbon fiber reinforced Polyetheretherketone (PEEK) acquires mechanical strength which is close to human bone, but PEEK is inert, which can affect the bone fixation and osseointegration during dental implantation. To improve the bioactivity of PEEK, surface modification with nitric acid (HNO) and calcium chloride (CaCl) were utilized in this work. As the results, the hydrophilicity of the treated samples is significantly improved with the reduced roughness and attached nitro-functional group on its surface.

Ultra Fast Oil-Water Separation for Different Viscous Oil Using Flourine-Free, Reusable, Superhydrophobic Polyurethane Sponge.

To exploit new adsorbents for oil-spill cleanup, a superhydrophobic material was fabricated by hightemperature reduced graphene oxide (HRGO) coated on commercial polyurethane (PU) sponge via facile dip-coating process. Compared with chemical reagent reduced graphene oxide, the graphene showed expanded sheets and vast surface area, which ensured the water contact angle of this synthesized sponge reached 150.0±2.