The aim of this study was to evaluate the clinical behavior of two conventional glass ionomers used for pit and fissure sealing in terms of retention, marginal adaptation, caries recurrence and cracking. Eighty-three fully erupted first permanent molars were sealed, in a group of children aged 5 to 8 years. A double-blind, single operator, paired design was used. Materials applied were Fuji IX ...

Background/Aim. The aim of this study was to determine the effect of propofol on acid reflux as measured with the Bravo pH monitoring system. Methods. 48-hour pH tracings of 88 children were retrospectively evaluated after placement of the Bravo capsule under propofol. Comparisons between day 1 and day 2, as well as 6-hour corresponding segments from day 1 and day 2, were made. Results. The num...

The aggregation of the â-peptide into amyloid is a key pathological event in Alzheimer’s disease. This process (â-amyloidosis) involves the conversion of soluble random coil, R-helical or â-sheet conformations into insoluble, aggregated â-pleated sheet structures. The pH is a significant extrinsic factor that influences â-amyloidosis, which must be related to the presence of ionizable groups in...

To reply to the criticism of Drs Dobkin and Yeston, we first note that it is based on a previously published report by them and others,' which concluded that pH paper lacks clinical accuracy in guiding prophylaxis for stress gastritis and that reliance on its use would lead to a significant incidence of undertreatment. In two other studies, however, intragastric pH monitored continuously with a...

Daun afrika (Vernonia amygdalina) contains flavonoids, tannins, saponins, and terpenoids that can be used for pharmacology activity: annihilate the parasites causing schistosomiasis, malaria leishmaniasis, antiamoeba, antitumor antimicrobials. The purposes of this research were to screen the phytochemistry african leaf, formulate test stability vanishing cream (VC) base. methods sample col...

The major protein constituent of amyloid deposits in Alzheimer’s disease is the â-peptide, which in solution can fold as a random coil, monomeric R-helix, or oligomeric â-sheet structure, the latter structure being toxic and eventually precipitating as amyloid. In this report, using circular dichroism and nuclear magnetic resonance spectroscopic techniques, we demonstrate that in micelle soluti...

A novel neural surface protein, Bravo, shows a pattern of topological restriction in the embryonic chick retinotectal system. Bravo is present on the developing optic fibers in the retina; however, retinal axons in the tectum do not display Bravo. The appearance of Bravo in vitro is modulated by environmental cues. Axons growing out from retinal explants on retinal basal lamina, their natural s...

A novel neural surface protein, Bravo, shows a pattern of topological restriction in the embryonic chick retinotectal system. Bravo is present on the developing optic fibers in the retina; however, retinal axons in the tectum do not display Bravo. The appearance of Bravo in vitro is modulated by environmental cues. Axons growing out from retinal explants on retinal basal lamina, their natural s...

A general procedure for the synthesis of enantiopure â-substituted, â-amino acids is presented. Alkylation of the sodium enolates derived from chiral N-acyloxazolidinone imides 2 (R ) Me, i-Pr, t-Bu, Ph, Bn) with tert-butyl bromoacetate afforded the 2-substituted succinate derivatives 3 in good yields (82-89%) and with high selectivity (g93:7). Following hydrolysis, Curtius rearrangement of the...