background & aim: erosion has been defined as the irreversible loss of dental hard tissue by a chemical process not involving bacteria. dental erosion is an important cause of tooth tissue loss in both children and adults. acids of intrinsic and extrinsic origin (gastric juice and acidic foodstaffs, beverages) are thought to be the main etiologic factors for dental erosion. the reported inciden...

Bacteria are part of the natural microbial ecosystem of wine and play an important role in winemaking by reducing wine acidity and contributing to aroma and flavour. Conversely, they can cause numerous unwelcome wine spoilage problems, which reduce wine quality and value. Lactic acid bacteria, especially Oenococcus oeni, contribute positively to wine sensory characters, but other species, such ...

A flow injection manifold is proposed for the sequential determination of titratable (total) acidity based on a pseudotitration and of tartaric acid based on the formation of a coloured vanadate complex. The method involves in-line dialysis prior to injection to avoid interference from the sample background absorption in the spectrophotometric detection. The changes in the colour of both reacti...

Twenty four hour intragastric acidity and nocturnal acid output have been measured over five separate 24 hour periods in each of 12 patients with duodenal ulcer receiving either placebo, cimetidine 400 mg bd, cimetidine 300 mg nocte, ranitidine 150 mg bd, or ranitidine 300 mg nocte. In these doses ranitidine was significantly more effective at decreasing intragastric acidity and nocturnal acid ...

Ulcer formation after pylorus ligation was assessed in control, testosterone treated and castrated male rats after cimetidine treatment. The stomach was studied for incidence of ulcers and its contents analysed for pH, volume, total acidity, free acidity, pepsin and mucin activity. Testosterone and cimetidine when used alone protected from ulceration while when used in combination the degree of...

BY R. A. MILLER, B.A., M.D., M.R.C.P.* (From the Royal Infirmary, Edinburgh) Systematic observations on the gastric acidity throughout the first month of life have been undertaken, as no records of its behaviour during that period have been noted in the literature. In order to investigate the acidity, the fasting juice of fifty healthy, mature breast-fed infants was withdrawn from the stomach s...

The cactus prickly pears rich in micronutrients, has recently generated a great deal of consumer interest, therefore, this paper was designed to study its physical and chemical compositions such as: moisture, sugar content, total fibres, protein, ash, pH, acidity, minerals contents and total phenolics contents of nine prickly pear juices. Polyphenols are antioxidants who contribute to the nutri...

Overall climatic effects on citrus fruit quality have been well-documented and are discussed by W. Reuther in his section on "Climate and Fruit Quality". These can be briefly summarized as higher sugar levels and lower acidity in humid areas with warm nights. Conversely, sugar levels tend to be lower and acidity higher in arid areas with cool nights. Such generalizations often vary when shorter...

Gas-phase acidities of 15 aliphatic carboxylic acids, X CH -,COOH, have been calculated using the MNDO method. Among the substituted groups exist the electron donor alkyl groups and electron acceptor halogens. The average error in acidity is within the experimental uncertainty of the data. Systematic errors have been found for the substituents which form internal hydrogen bondings. A reaso...

The present study was undertaken to elucidate the effect of pantoprazole and aprepitant on experimental esophagitis in albino rats. Groups of rats, fasted overnight, received normal saline (3 mL/kg, sham control) or toxic control (3 mL/kg) or pantoprazole (30 mg/kg) or aprepitant (10 mg/kg), or their combinations and were subjected to pylorus and forestomach ligation. Animals were sacrificed af...