735 research outputs found
Characterization of a cDNA clone for the nonspecific cross-reacting antigen (NCA) and a comparison of NCA and carcinoembryonic antigen
Comparison of different lattice definitions of the topological charge
We present a comparison of different definitions of the topological charge on
the lattice, using a small-volume ensemble with 2 flavours of dynamical twisted
mass fermions. The investigated definitions are: index of the overlap Dirac
operator, spectral projectors, spectral flow of the Hermitian Wilson-Dirac
operator and field theoretic with different kinds of smoothing of gauge fields
(HYP and APE smearings, gradient flow, cooling). We also show some results on
the topological susceptibility.Comment: 7 pages, 2 figures, presented at the 32nd International Symposium on
Lattice Field Theory (Lattice 2014), 23-28 June 2014, Columbia University,
New York, NY, US
Evaluation and experimental design in data mining and machine learning: Motivation and summary of EDML 2019
[No abstract available
Intrapancreatic accessory spleen: A rare cause of a pancreatic mass
Summary: Conclusion: The clinical significance of intrapancreatic accessory spleens resides in the mimicry of pancreatic cancer. Radionuclide tests (Octreotide scan and Tc99m sulfur colloid scan) should be undertaken to distinguish these lesions from neuroendocrine tumors, hypervascular metastases and pancreatic carcinoma. If the tests are equivocal, diagnostic laparotomy or laparoscopy is recommended. Background: Despite its relatively common occurrence, intrapancreatic ectopic splenic tissue is rarely deted owing to its asymptomatic nature. Methods: We report a case of a clinically asymptomatic patient in which abdominal computed tomography (CT) scans revealed a mass of 1.5 cm in diameter in the distal pancreas. The tumor markers CA 19-9 and carcinomebryonic antigen (CEA) were slightly elevated, and pancreatic neoplasm was suspected. Results: Left pancreatic resection and splenectomy were performed. The removed specimen disclosed the presence of an accessory spleen within the pancreatic tai
Herpes simplex virus hepatitis 4 years after liver transplantation
If not promptly recognized and treated, herpes simplex virus (HSV) hepatitis is associated with a high mortality. A patient transplanted for primary sclerosing cholangitis required, 4 years later, a colectomy for a steroid-resistant flare of ulcerative colitis. He subsequently developed fever, with genital and oral ulcerations. He was hospitalized for diabetic decompensation with massive elevation of serum aminotransferases. Examination revealed vesicles on the hands. Liver biopsy showed Cowdry type B inclusions. Therapy with acyclovir was immediately initiated and the patient recovered. This case illustrates the diagnostic importance of mucocutaneous lesions in the assessment of complications after liver transplantatio
Role of Hepatic Stellate Cells in the Early Phase of Liver Regeneration in Rat: Formation of Tight Adhesion to Parenchymal Cells
We investigated activation mechanisms of hepatic stellate cells (HSCs) that are known to play pivotal roles in the regeneration process after 70% partial hepatectomy (PHx). Parenchymal liver cells (PLCs) and non-parenchymal cells (NPLCs) were isolated and purified from the regenerating livers at 1, 3, 7, 14 days after PHx. Each liver cell fraction was stained by immunocytochemistry using an anti-desmin antibody as a marker for HSCs, anti-alpha-smooth muscle actin (alpha-SMA) as a marker for activated HSCs, and 5-bromo-2'-deoxyuridine (BrdU) for detection of proliferating cells. Tissue sections from regenerating livers were also analyzed by immunohistochemistry and compared with the results obtained for isolated cell fractions. One and 3 days after PHx, PLC-enriched fraction contained HSCs adhered to PLCs. The HSCs adhered to PLCs were double positive for BrdU and alpha-SMA, and formed clusters suggesting that these HSCs were activated. However, HSC-enriched fraction contained HSCs not adhered PLCs showed positive staining for anti-desmin antibody but negative for anti-alpha-SMA antibody. These results suggest that HSCs are activated by adhering to PLCs during the early phase of hepatic regeneration
Dynamic mode locking in a driven colloidal system: experiments and theory
In this article we examine the dynamics of a colloidal particle driven by a
modulated force over a sinusoidal optical potential energy landscape. Coupling
between the competing frequencies of the modulated drive and that of particle
motion over the periodic landscape leads to synchronisation of particle motion
into discrete modes. This synchronisation manifests as steps in the average
particle velocity, with mode locked steps covering a range of average driving
velocities. The amplitude and frequency dependence of the steps are
considered, and compared to results from analytic theory, Langevin dynamics
simulations, and dynamic density functional theory. Furthermore, the critical
driving velocity is studied, and simulation used to extend the range of
conditions accessible in experiments alone. Finally, state diagrams from
experiment, simulation, and theory are used to show the extent of the
dynamically locked modes in two dimensions, as a function of both the
amplitude and frequency of the modulated drive
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