Lead-free tin-halide perovskites are of interest for photovoltaic applications, although simulation-based optimisation can obscure the range of absorber thicknesses that yield comparable performance. This study reanalysed an archived SCAPS-1D dataset for an ITO/SnO₂/MASnI₃/Cu₂O/A...
Open access
Research Article10.9734/ajopacs/2026/v14i4359
Direct methanol fuel cells (DMFCs) are promising electrochemical energy conversion systems; however, the sluggish kinetics of methanol oxidation and the high cost of conventional noble-metal catalysts remain significant challenges. Developing low-cost alternative electrode materi...
Open access
Research Article10.9734/ajopacs/2026/v14i4356
Hospital wastewater contains organic and inorganic pollutants as well as potentially hazardous biological and pharmaceutical constituents. This descriptive case study evaluated selected physicochemical indicators and operational practices at the wastewater treatment plant serving...
Open access
Research Article10.9734/ajopacs/2026/v14i4357
Access to safe water remains a significant concern in rural communities of Nigeria, where springs and streams serve as important sources of domestic water. During the rainy season, surface runoff and anthropogenic activities may increase water contamination. However, comparative...
Open access
Research Article10.9734/ajopacs/2026/v14i4358
Phase engineering of two-dimensional Dirac materials via selective chemical functionalization offers a promising route toward controlling electronic and magnetic properties for nanoscale device integration. Using first-principles density functional theory calculations within the...
Open access
Research Article10.9734/ajopacs/2026/v14i4355
Background: Synoptic wind archives often contain exact zero-speed observations. Treating these observations as missing can distort wind-resource estimates, particularly where calms are frequent. Aims: To measure how treating calm (zero-speed) records in synoptic wind archives cha...
Open access
Research Article10.9734/ajopacs/2026/v14i4354
Natural radionuclide levels and radiological hazard indices in soils from selected farmlands around landfills in Rivers State, Nigeria, were assessed using gamma-ray spectroscopy with a NaI (Ti) detector. The assessment considered 40K, 238U and 232Th at the Aluu, IAUE and Igwurut...
Open access
Research Article10.9734/ajopacs/2026/v14i4353
Atomic absorption spectrophotometry (AAS) was used to determine the total concentrations of heavy metals (Pb, Ni, Zn, Fe, Cd, and Cr) in soil samples from Rumuolumini, Aluu, and Igwuruta communities in Rivers State, Nigeria. The study evaluated metal concentrations, contamination...
Open access
Research Article10.9734/ajopacs/2026/v14i4352
The dielectric response of aqueous glycine was examined from 10 MHz to 30 GHz at seven nominal temperatures between 25 and −5 °C over a reported composition series of 0–1.0 mol L⁻¹. Time-domain reflectometry data were interpreted with a single Cole–Davidson relaxation function to...
Open access
Research Article10.9734/ajopacs/2026/v14i4351
Objective : This study aimed to characterise the dietary sources consumed by elite Chadian combat-sport athletes during the pre-competition period and to quantify the crude protein content and total lipid levels of the main cereals and pulses included in their diets. Design : A d...
Open access
Research Article10.9734/ajopacs/2026/v14i4350