Publications by authors named "Ibrahim Lawan"
Toxicant-induced behavioural changes provide important insights into environmental toxicity, particularly in vulnerable tropical marine habitats. However, ecotoxicological knowledge of organisms in these environments is insufficient. We aimed to develop innovative and cost-effective ecotoxicology methods using Parhyale hawaiensis as a tropical model organism.
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- - This study introduces a new composite material made by integrating laser-induced graphene (LIG) onto a polylactic acid (PLA) substrate, resulting in a shape memory polymer composite (SMPC) that can respond to multiple stimuli and detect its own deformation.
- - LIG was successfully transferred onto the PLA substrate using hot compression, showing good adhesion and optimal electrical properties, which enable temperature control through Joule heating when power is applied.
- - The composite’s ability to react to infrared light and self-sense deformation via changes in electrical resistance provides a simple manufacturing method, paving the way for advanced materials that are both responsive and capable of real-time monitoring without the need for additional components.
This study investigated the sustainable toughening of polylactic acid (PLA) by incorporating ultrafine fully vulcanized powdered natural rubber graft-copolymerized with poly-styrene-co-acrylonitrile (UFPNR-SAN). We investigated the effect of the styrene-to-acrylonitrile ratio (ST:AN) used during the grafting process on the final UFPNR-SAN compatibility with PLA. The ST:AN ratio was systematically varied during the grafting reaction to prepare UFPNR-SAN with a range of different surface energies.
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- This study investigated how loading titanium nitride (TiN) nanoparticles into a bio-based benzoxazine/epoxy copolymer affects the performance of the composite, particularly focusing on its shape memory properties under sunlight irradiation.
- Researchers found that varying levels of TiN (from 1 to 7 wt%) improved the light absorbance, thermal stability, and physical properties (visco-elastic and tensile) of the composites, with an optimum performance observed at TiN-5(wt%).
- The composite with the highest TiN loading (TiN-7(wt%)) demonstrated significant enhancements in shape memory performance, achieving a shape fixity ratio of 95% and a recovery time of 38 seconds, showcasing the
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- - This text is a correction notice for a previously published article, identified by the DOI: 10.1039/D3NA01026K.
- - The correction is likely to address errors or inaccuracies found in the original publication.
- - Readers are encouraged to refer to the corrected version for accurate information and findings.
Article Synopsis
- Laser-induced graphene (LIG) is usually made from polyimide, but its flexible nature limits its use in certain applications; polybenzoxazine is being investigated as an alternative substrate despite its brittleness and lower thermal stability.
- The study aims to improve the properties of polybenzoxazine by combining it with polyimide, enhancing factors like toughness, char residue, and thermal stability, and further analyzing the resultant LIG's electrical resistivity and structural features.
- The research yielded LIG with better electrical properties and structure compared to traditional polybenzoxazine, achieving impressive results with optimal laser settings, and validated a quadratic model to describe the production process effectively.
Background: According to the World Health Organization (WHO) data, 600,000 cases of rifampicin-resistant tuberculosis (TB) have been reported worldwide, including 490,000 cases of multidrug-resistant TB. Thus, through the present study, we proposed to evaluate the resistance of Mycobacterium tuberculosis to rifampicin in the regional hospital of Maradi.
Methods: Our study involved 887 sputum samples that were GeneXpert tested from January 2016 to December 2020.
Introduction: The willingness of Africa's population to patronise the COVID-19 vaccines is critical to the efficiency of national immunisation programmes. This study surveys the views of adult African inhabitants toward vaccination and the possibility of participating or not participating in governments' efforts to get citizens vaccinated.
Method: A cross-sectional online survey of adult Africans was undertaken from December 2020 to March 2021.
Background: Outcomes of retreatment for rifampicin-resistant tuberculosis (RR-TB) are rarely reported. We report 'definitive outcomes' after a cascade approach to RR-TB treatment. After a bacteriologically adverse outcome for the 9-months fluoroquinolone-based Short Treatment Regimen (STR), patients were retreated with a bedaquiline-based regimen (BDQ-regimen).
View Article and Find Full Text PDFHigh rifampicin-resistant TB cure rates and prevention of severe ototoxicity after replacing the injectable by linezolid in early stage of hearing loss.
Eur Respir J
January 2021
The short treatment regimen (STR) achieves a >80% cure in rifampicin-resistant tuberculosis (RR-TB) patients. However, ototoxicity induced by the injectable is a concern. This is the first study to evaluate the replacement of injectables by linezolid in patients with audiometry abnormalities at baseline or during the treatment.
View Article and Find Full Text PDFIn an attempt to overcome such threats posed by water pollution, various processes ranging from physical, chemical as well as biological were applied to get rid of wastewater pollutants. The simplicity, high efficiency and cheapness of an adsorption process make it the most widely used among various other processes. Adsorbents with different properties were used in the adsorption process but this paper was focused on reviewing various articles published by numerous researchers on the isolation of microcrystalline cellulose (MCC), a popular carbohydrate polymer from lignocellulosic biomass and utilization of MCC based materials as effective adsorbents for the successful removal of dyes and heavy metals from synthetic wastewater.
View Article and Find Full Text PDFIntroduction: This study aimed to describe the epidemiological, clinical and evolutionary profile of patients treated for tuberculosis at the Regional Hospital of Maradi.
Methods: We conducted a retrospective, descriptive and analytical study of data from the medical records of patients treated for tuberculosis from 1 January 2015 to 31 December 2017.
Results: A total of 595 patients were followed (406 men, 68.
In this review article, a significant number of published articles (over three decades) were consulted in order to provide comprehensive literature information about chlorophenols, their sources into the environment, classification, and toxicity, various wastewater treatment methods for their removal as well as the characteristics of their adsorption by various adsorbents. Organizing the scattered available information on a wide range of potentially effective adsorbents in the removal of chlorophenols is the principal objective of this article. Various adsorbents such as natural materials, waste materials from industries, agricultural by-products and biomass-based activated carbon in the removal of various chlorophenols have been compiled and discussed here.
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