Pibulsongkram Rajabhat University

Multistability and bifurcation phenomena in a four-partitions piecewise linear map

This paper investigates the global dynamics and bifurcation structures of a two-dimensional piecewise linear map defined by four partitions, involving absolute value terms for both state variables. An analysis of fixed point stability demonstrates that the emergence of period-2 d...

Mechanochemically Prepared Supported Ionic Liquids for Efficient Glycerol Valorization to Glycerol Carbonate

Abstract The valorization of glycerol, a major byproduct of the biodiesel industry, into high value chemicals offers a sustainable pathway to support circular economy objectives within biorefineries. Among various transformation routes, the transesterification of glycerol with di...

Human health risk assessment of PM 2.5 -bound heavy metals during a haze season in a semi‑urban agricultural area of Northern Thailand

This study assessed PM2.5-bound heavy metals (Cd, Pb, Cr, Cu, and Fe) and associated human health risks at a semi-urban-agricultural site in Phitsanulok, lower northern Thailand, during the 2024–2025 haze season. Enrichment factors (EF), geoaccumulation index (Igeo), and US EPA h...