University Frères Mentouri Constantine 1

Valorizing Olive Pomace into a Biochar-Based Slow-Release NPK Fertilizer

The excessive use of conventional NPK fertilizers can reduce nutrient use efficiency due to nutrient losses, emphasizing the need for controlled-release fertilizer systems. This study aimed to prepare and evaluate olive pomace-derived biochar (BC) as a carrier for nitrogen–phosph...

Chemical Composition and Antibacterial Activity of Lavandula spica L essential oil from Algeria

Lavandula spica L, a species within the Lamiaceae family, is a plant native to Algeria, widely recognized and utilized for various purposes. The study aimed to determine the chemical composition of the essential oil and its antibacterial evaluation. Chemical composition of the es...

Diagnosing Structural Fragility in Rentier States by Operationalizing the Constraint Residual (Φ): Comparative Trajectories in Algeria, Saudi Arabia, and Norway, 1980–2021

Macroeconomic indicators fail to capture the slow accumulation of structural rigidities preceding political ruptures in rentier states. Drawing on an analogy with Differential-Algebraic Equation (DAE) systems, where unresolved constraints can accumulate and drive institutional br...