546 research outputs found
Imaging Optical Frequencies with 100 1microHz Precision and 1.1 micro m Resolution
We implement imaging spectroscopy of the optical clock transition of
lattice-trapped degenerate fermionic Sr in the Mott-insulating regime,
combining micron spatial resolution with submillihertz spectral precision. We
use these tools to demonstrate atomic coherence for up to 15 s on the clock
transition and reach a record frequency precision of . We
perform the most rapid evaluation of trapping light shifts and record a 150 mHz
linewidth, the narrowest Rabi line shape observed on a coherent optical
transition. The important emerging capability of combining high-resolution
imaging and spectroscopy will improve the clock precision, and provide a path
towards measuring many-body interactions and testing fundamental physics.Comment: 5 pages, plus 3 page supplemental materia
3-(4-Fluoropiperidin-3-yl)-2-phenylindoles as High Affinity, Selective, and Orally Bioavailable h5-HT 2A
Sorafenib as first- or second-line therapy in patients with metastatic renal cell carcinoma in a community setting
Alteration of amino acid metabolism in neuronal aggregate cultures exposed to hypoglycaemic conditions
Bovine Pericardium Patch Wrapping Intestinal Anastomosis Improves Healing Process and Prevents Leakage in a Pig Model
Failure of intestinal anastomosis is a major complication following abdominal surgery. Biological materials have been introduced as reinforcement of abdominal wall hernia in contaminated setting. An innovative application of biological patch is its use as reinforcement of gastrointestinal anastomosis. The aim of study was to verify whether the bovine pericardium patch improves the healing of anastomosis, when in vivo wrapping the suture line of pig intestinal anastomosis, avoiding leakage in the event of deliberately incomplete suture. Forty-three pigs were randomly divided: Group 1 (control, n = 14): hand-sewn ileo-ileal and colo-colic anastomosis; Group 2 (n = 14): standard anastomosis wrapped by pericardium bovine patch; Group 3 (n = 1) and 4 (n = 14): one suture was deliberately incomplete and also wrapped by patch in the last one. Intraoperative evaluation, histological, biochemical, tensiometric and electrophysiological studies of intestinal specimens were performed at 48 h, 7 and 90 days after. In groups 2 and 4, no leak, stenosis, abscess, peritonitis, mesh displacement or shrinkage were found and adhesion rate decreased compared to control. Biochemical studies showed mitochondrial function improvement in colic wrapped anastomosis. Tensiometric evaluations suggested that the patch preserves the colic contractility similar to the controls. Electrophysiological results demonstrated that the patch also improves the mucosal function restoring almost normal transport properties. Use of pericardium bovine patch as reinforcement of intestinal anastomosis is safe and effective, significantly improving the healing process. Data of prevention of acute peritonitis and leakage in cases of iatrogenic perforation of anastomoses, covered with patch, is unpublished
All in order: Distribution of serially correlated order statistics with applications to hydrological extremes
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