background and objective: intraoperative consultation by frozen section is a high – risk procedure with important consequences. therefore, it is critical to determine efficiency of frozen section performance periodically. this study was performed to determine the accuracy of frozen section in urmia university of medical sciences. materials & methods:inthis cross sectional study, we compare...

HERA, the only ep collider, operated in the years 1992-2007 at centre-of-mass energies of 300320 GeV in Hamburg, Germany. Deep inelastic neutral (ep → eX) and charged (ep → νX) current scattering at HERA provides the possibility to study the structure of the proton, the dynamics of strong interactions and test quantum chromodynamics (QCD) over a huge kinematic range. Both, neutral and charged c...

background: we aimed to determine the frequency of liver copper storage diseases in iranian children with cryptogenic chronic liver disease (cld). materials and methods: one-hundred and twenty children (52 girls, 70 boys; age range: 3 months-14 years) with cld who attended children's medical center in tehran, iran during the years 1997 through 1999, were enrolled. all viral, metabolic and autoi...

When the Higgs sector of the standard model is replaced by a flavor doublet of color sextet quarks, dynamical electroweak symmetry breaking occurs, with the electroweak scale identified as the sextet chiral scale. Above the electroweak scale QCD is almost scale-invariant, leading to the high-momentum enhancement of both the sextet chiral condensate and instanton interactions. The instanton inte...

We identify the differential cross sections for tt̄ production and the total cross section for Higgs production through gluon fusion as the processes in which the two effective operators describing the leading non-standard interactions of the top quark with the gluon can be disentangled and studied in an independent fashion. Current data on the Higgs production and the dσ/dpT differential cross ...

If dynamical electroweak symmetry breaking is due to a flavor doublet of color sextet quarks, enhanced electroweak scale QCD instanton interactions may produce a large top mass, raise the η6 axion mass, and also explain the excesses in the DIS cross-section at HERA and jet cross-sections at the Tevatron. Presented at the 5th International Workshop on Deep Inelastic Scattering and QCD, Chicago, ...

BACKGROUND The purpose of this study was to compare DNA histograms obtained by standard flow cytometry (FC) and high fidelity image cytometry on sections (ICS) in normal gastrointestinal mucosa and Barrett's adenocarcinoma (BAC). METHODS Archival formalin-fixed paraffin-embedded tissue blocks of 10 normal controls from 10 subjects and 42 BAC tissues from 17 patients were examined. DNA FC was ...

This is a retrospective quality assurance study of all frozen sections done at The Aga Khan University Hospital during a six year period (1986 to 1991). There were 1,031 frozen sections out of a cumulative total of 42,985 surgical specimens (2.39%). Nine hundred and severity-six (94.66%) were concordant. In 92 (8.9%) fresh specimens were brought from other hospitals of Karachi, in 37 cases (3.5...

Staining of semi-thin sections of osmium-fixed epoxy resin (Epon or Araldite)-embedded tissues with haematoxylin and acid dyes as counterstains (eosin or phloxin) was successfully achieved after intense oxidation using hydrogen peroxide as the oxygen donor. Results are closely similar to those obtained with paraffin sections (haematoxylin and eosin): nuclei stain blue, cytoplasm and extracellul...