Browsing by Author "Lateef, A."

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    Application and Benefits of Dietary Nanoparticles in Aquaculture: A Review
    (Nano Plus: Science and Technology of Nanomaterials, 2021-10-12) Omosanya, Toyeeb Adetunji; Yekeen, T.A.; Fawole, O.O.; Azeez, M.A; Lateef, A.
    Fish nutrition is the single most important input in aquaculture production. It influences fish growth, quality, health, with subsequent increase in production and waste generation. Nanotechnology is an emerging concept with diverse applications including fish nutrition. It involves the use of nanoparticles within the scale of 1 – 100 nm. The physiological role of nanoparticles depends on their structural and functional characteristics. In aquaculture, nanotechnology techniques have been found efficient in water treatment, while nano-delivery system has been perceived as a safer and more efficient alternative procedure to fish vaccination, nutrient delivery, and effective in fish disease diagnosis and treatment. Fortification of fish diets with nutrient and non-nutrient bioactive components enhance the total nutrient profile balance of a diet and supplement nutrients recovery during feed processing. Administration of dietary nanoparticles provides an increase in surface area available for interaction with biological support. Incorporation of nanoparticles into the fish diet has been found to improve fish production and when employed as encapsulating materials, they serve as carriers for essential oils, flavour, antioxidants, vitamins, minerals and phytochemicals thereby facilitating their bioavailability to fish. The NPs of importance to fish nutrition include those produced from chitosan, copper (Cu), selenium (Se), iron (Fe), gold (Au), zinc oxide (ZnO) and silver (Ag). Various applications of nanoparticles in fish nutrition with their probable potential adverse effects are explored in this study with a view to devising fish management strategy that will maximize the full benefit of nanoparticles with little to no risk of toxicity.
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    Corrosion inhibition performance of silver nanoparticles embedded-gloss paint on carbon steel and aluminium substrates in 2.0 M H2SO4 solution
    (Nano Plus: Sci. Tech. Nanomat. 4 (2022) 57–66, 2022-06-30) Asafa, T.B.; Olawore, A. S.; Odusote, J. K.; Enone, G. A.; Lateef, A.; Adeleke, A. A.
    Corrosion control of metals in aggressive environments has attracted a lot of attention due to its associated economic losses. However, most corrosion control techniques have not satisfactorily minimized these losses. This study examined the inhibition effects of silver nanoparticles (AgNPs) incorporated in gloss paint on corrosion of carbon steel and aluminium in 2.0 M H2SO4 solution. The AgNPs were biosynthesized via green chemistry and characterized using Fourier Transform Infrared, UV-Vis spectrometer, and Transmission Electron Micro-scope. Samples of carbon steel and aluminium were uniformly coated with a thin layer of gloss paint mixed with AgNPs solution at five different concentrations of 0, 5, 10, 15, and 20 μg/ml. The inhibition efficiency of the AgNPs modified paint was conducted via gravimetric, gasometric, and potentiodynamic polariza-tion analyses. Results of the gravimetric analysis revealed an increased weight loss with an increased period of exposure and decreased concentration of AgNPs in the paint. The corrosion rates for the mild steel and aluminium samples were 0.051 and 0.005 mmpy with inhibition efficiencies of 42% and 69%, respective-ly, when immersed in 20 μg/ml AgNPs-incorporated coating and exposed for 120 hours. Potentiodynamic polarization analysis revealed that the presence of AgNPs in the paint (as inhibitor) retarded the anodic dissolution by the formation of protective films on the mild steel and aluminium sample surfaces. The evolu-tion of hydrogen gas from 20 μg/ml AgNPs-incorporated coating was signifi-cantly reduced by 81% and 14% for mild steel and aluminium, respectively, when compared with the control samples at 200 mins of exposure. These results revealed that incorporation of AgNPs into the gloss paint matrix minimizes the degradation due to corrosion of the mild steel and aluminium samples.