INFLUENCE OF ELEMENT OXYGEN ON THE ABSORPTIVITY AND EMISSIVITY OF 434-L STAINLESS-STEEL SOLAR SELECTIVE ABSORBER FOR SOLAR THERMAL CONVERSION APPLICATION . paauajs [Internet]. 2026 Jan. 15 [cited 2026 Apr. 15];1(1):31-9. Available from: https://paauascience.com.ng/index.php/paausjsdata/article/view/10