In order to improve the corrosion resistance of aluminosilicate refractories by molten aluminum, alkaline fluoride NaF and cryolite Na3AlF6 powders were studied. Both physical and chemical properties are known to influence wetting and corrosion behavior. This paper devoted to determine the influence of alkaline fluoride and cryolite added to andalusite based castable on the reaction with a...

background: it has been claimed that by using different washing methods, the sperms can be separated according to size, motility, density, chromosomal content and surface markings and charge. these methods also reduce sperm chromatin deficiencies and screen the sperms before applying in assisted reproduction techniques. objective: this study compared simple density gradient methods and a combin...

purpose: to evaluate and compare tear secretion and tear film instability following laser in situ keratomileusis (lasik) and laser assisted subepithelial keratectomy (lasek). methods: in a randomized clinical trial, 30 eyes of 15 patients underwent lasik and 30 eyes of 15 patients underwent lasek to correct myopia. tear secretion and tear film instability were tested preoperatively, 2 and 6 wee...

perrault's syndrome (p.s.) is rare. the combination of gonadal dysgenesis and hearing loss was accompanied by 46,xxkaryotype in three sisters with parental consanguineous marriage. genetic investigation revealed normal female karyotype, positive liarr and negative fluorescence ipj-bodies, which was confirmed by molecular study on the basis of fluorescence in situ hybridization (pish), with appl...

background: acute promyelocytic leukemia (apl) is a subclass of acute myeloid leukemia. the chromosomal aberration in 95% of apl cases is t(15; 17) (q22; q21), which prevents cell differentiation. characterization of the underlying molecular lesion is valuable in determining optimal treatment strategy. the goal of this study was to develop a new and powerful flow- fish technique to detect the l...

purpose : to assess and to compare stromal and endothelial changes at the cellular level in patients who had photorefractive keratectomy (prk) and laser in situ keratomileusis (lasik) using in vivo confocal microscopy methods : in this semiexperimental study, 32 eyes of 16 patients (4 males and 12 females) with low to moderate myopia [-1.00 to -4.50 diopters (d)] or low to moderate myopic astig...

atom transfer radical polymerization of styrene (st) and methyl methacrylate (mma) was performed at 90oc in the absence and presence of nanoclay (cloisite 30b). trichloromethyl-terminated poly(vinyl acetate) telomerand cucl/ pmdeta were used as a macroinitiator and catalyst system, respectively. the experimental results showed that the atom transfer radical polymerization of st and mma in the a...

we have analyzed paraffin sections from 55 patients with histologically confirmed hodgkin’s disease (hd) for the presence of epstein-barr virus (ebv) markers using in situ hybridization to detect the ebv-encoded rnas (ebers) and immunohistochemistry to identify latent membrane protein-1 (lmp1) expression. tissue specimens from 55 cases of hodgkin’s disease included 22-mixed cellularity (mc), 27...

In the presence of p-toluenesulfonic acid as catalyst the domino reaction of arylamines, methyl propiolates and aromatic aldehydes in ethanol proceeded smoothly to give polysubstituted 1,2,3,4-tetrahydroquinolines in moderate yields. The reaction is believed to involve the Povarov reaction of in situ generated β-enamino ester with the in situ formed aromatic imine.