To reduce diesel emissions while permitting the passive regeneration of the diesel particulate filter (DPF) at low temperatures. we developed three after-treatment DPF devices. These devices consisted of a ceramic body that was either bare or loaded with the catalysts CeO 2 (DPF-CeO 2 ) or Ce 0. 5 Mn 0. https://parisnaturalfoodes.shop/product-category/fennel-toothpaste/