Revision surgery after previous spinal decompression and fusion for lumbar spinal stenosis.

Unlabelled: Nowadays, vertebral stenosis is the most common indication for surgical treatment in patients over 65 years old in spine surgery. According to the literature, there are conflicting data on the incidence and indications for revision surgery after previous spinal decompression and fusion for lumbar spinal stenosis.

Objective: To evaluate the incidence and indications for revision surgery after previous spinal decompression and fusion for lumbar spinal stenosis.

Influence of exoskeleton use on welding quality during a simulated welding task.

Purpose: The aim of this study is to investigate the effects of wearing exoskeletons during welding on the quality of the weld seam.

Material And Methods: A total of  = 15 young healthy subjects with welding experience took part in the study. The study design defines a 1-hr workflow that abstracts welding and grinding tasks.

Novel Approach for the Synthesis of Chlorophosphazene Cycles with a Defined Size via Controlled Cyclization of Linear Oligodichlorophosphazenes [Cl(PCl=N)-PCl][PCl].

Despite a significant number of investigations in the field of phosphazene chemistry, the formation mechanism of this class of cyclic compounds is still poorly studied. At the same time, a thorough understanding of this process is necessary, both for the direct production of phosphazene rings of a given size and for the controlled cyclization reaction when it is secondary and undesirable. We synthesized a series of short linear phosphazene oligomers with the general formula Cl[PCl2=N]n-PClPCl and studied their tendency to form cyclic structures under the influence of elevated temperatures or in the presence of nitrogen-containing agents, such as hexamethyldisilazane (HMDS) or ammonium chloride.

Empagliflozin-induced ketoacidosis in a patient presenting with new-onset type 2 diabetes mellitus due to indolent pancreatic cancer.

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The DNA-binding protein HTa from is an archaeal histone analog.

Histones are a principal constituent of chromatin in eukaryotes and fundamental to our understanding of eukaryotic gene regulation. In archaea, histones are widespread but not universal: several lineages have lost histone genes. What prompted or facilitated these losses and how archaea without histones organize their chromatin remains largely unknown.