The gastric glands of Triturus carnifex (Amphibia, Caudata) have been examined by histochemical and immunohistochemical methods with particular regard to hydrochloric acid and pepsinogen secretion. Fundic glands consist of mucous neck cells, endocrine cells and oxynticopeptic cells producing both pepsinogen and hydrochloric acid. The neck cells showed an unexpected distribution pattern which wa...

OBJECTIVES The aim of this in-vitro study was to assess the long-term effects of hydrochloric acid on the surface roughness of three all-ceramic restorative materials CEREC VITABLOC Mark II CAD, IPS Empress CAD and IPS e.max CAD. MATERIALS AND METHODS Six cylindrical specimens (10mm diameter, 3mm height) of each material type were prepared, using the CEREC CAD/CAM machine. The unpolished samp...

The N-chloroacetyl and N-acetyl derivatives of some thirty racemic amino acids have been employed as starting materials for the subsequent enzymatic separation of the compounds into their opt.ical enantiomorphs (l-3).’ The procedure was always conducted in the absence of added buffer salts, the pH being set at 7 to 8 by addition of alkali to the aqueous solutions of the substrates. At the concl...

Extracts from wool dyed with sawwort (Serratula tinctoria L.) obtained with methanol/formic acid and methanol/hydrochloric acid solutions were examined by high-performance liquid chromatography with UV detection coupled with electrospray ionization tandem mass spectrometry. Chromatograms and mass spectra were registered in the negative ion mode under various orifice voltages and collision energ...

ion Ezchunye Resins-De-Acidite (The Permutit Company, New York), washed on a 40 mesh screen with distilled water, was treated several times with aqueous 4 per cent sodium carbonate and repeatedly washed with distilled water, by suspension and decantation, until the supernatant liquid was colorless and had a pH of 8.0 or less. The resin collected on a suction filter contained 70 to 80 per cent w...

The aim of this study was to evaluate by atomic force microscopy (AFM) the early phases and evolution of dental enamel erosion caused by hydrochloric acid exposure, simulating gastroesophageal reflux episodes. Polished bovine enamel slabs (4x4x2 mm) were selected and exposed to 0.1 mL of 0.01 M hydrochloric acid (pH=2) at 37 ?#61472;?#61616;C using five different exposure intervals (n=1): no ac...

I)I)ISONIAN pernicious anemnia is ami expressiomi of the deficiemicy of vitan imi B12 which results from lack of secretion of Castle’s imit.rimisic factor iii the stomach. It has been kuioivn to be associated with atrophy of the gastric mucosa for about 80 yearst and with gastric achlorhydria for 70 years.2 The latter has been so constant. a fimiding that it has almost always been regarded as e...