Mechanistic Insight into Heteroatom Removal from Vacuum Gas Oil Blended with PMMA or PET Waste.

This work analyzes vacuum gas oil (VGO) and hydrocracking products of this feed blended with polymethylmethacrylate (PMMA) or polyethylene terephthalate (PET) to clarify the oxygen, nitrogen, and sulfur removal pathways in these complex mixtures. Hydrocracking reactions are conducted in a semi-batch reactor with a Pt-Pd/HY bifunctional catalyst at 400 °C and 80 bar for 300 min with 10 wt % waste plastic using 0.1 catalyst/feed weight ratio.

Bone biopsy: indications, techniques, and complications.

Bone biopsy is the gold standard for diagnosing the type and severity of renal osteodystrophy (ROD) in end-stage renal disease (ESRD) patients. In this article we review the indications, techniques, and complications of this minimally invasive procedure. The importance of careful preparation is emphasized.