The recovery period of the taste responses of rat chorda tympani after application of toothpaste was examined. The response observations of four kinds of essential taste stimuli, 0.1 M sodium chloride, 0.005 M quinine hydrochloride, 1.0 M sucrose, and 0.05 M tartaric acid, were repeated every 2 or 5 minutes. After five observations of summated responses of the chorda tympani with each taste sti...

BACKGROUND The present study aimed to evaluate the intracanal bacterial reduction promoted by chemomechanical preparation using three different herbal extracts named Ocimum sanctum (OS), Cinnamomum zeylanicum (CZ), Syzygium aromaticum (SA) against Enterococcus faecalis. MATERIAL AND METHODS Root canals from extracted teeth were contaminated with Enterococcus faecalis ATCC 29212 for 7 days and...

This study quantified Escherichia coli (EC) and enterococci (ENT) in beach waters and dominant source materials, correlated these with ambient conditions, and determined selected EC genotypes and ENT phenotypes. Bathing-water ENT criteria were exceeded more frequently than EC criteria, providing conflicting interpretations of water quality. Dominant sources of EC and ENT were bird feces (10(8)/...

expansive soils can be found in many parts of the world particularly in arid and semi-arid regions. these soilspose a significant hazard to civil engineering structures due to its high swelling and shrinkage potential. this paperpresents the results of an experimental program developed to investigate the effect of cyclic drying and wetting on theswelling potential of expansive soils with variou...

The effects of prenatal amitraz exposure on physical and behavioral parameters of rats were studied. Pregnant rats were orally gavaged with amitraz (20 mg/Kg) or with distilled water (1.0 ml/Kg) on Days 1, 4, 7, 10, 13, 16, and 19 of pregnancy. After birth, cross-fostering was performed thus generating the following groups: control pups nursed by control dams (CC); control pups nursed by treate...

BACKGROUND The main goal of endodontic treatment is to achieve cleaning and shaping prior to the filling process. OBJECTIVE This study aimed to evaluate, using atomic absorption spectrometry, the release of Calcium ions after the use of different chelating agents and protocols of agitation. METHOD Ninety human canine teeth were randomly assigned to one of nine groups (n=10), as follows: 1) ...

Rice rats were distributed by littermate into four experimental groups as follows: stannous fluoride (0.4%), iodine-sodium iodide (1.0%), a combination of iodine-sodium iodide and stannous fluoride, and a distilled water control. Each rat was treated by swabbing the molar teeth daily. All rats were fed diet 2000 and double-distilled water ad libitum, and were sacrificed after 9 weeks. Root surf...

A comparative in vitro study was carried out to determine the ovicidal and larvicidal activity of aqueous and ethanolic extracts of Ageratum conyzoides (Asteraceae) leaves on the eggs (unembryonated and embryonated), first and second larval stages of Heligmosomoides bakeri. Four different concentrations (0.625, 1.25, 2.5, and 3.75 mg·mL(-1)) of both aqueous and ethanolic extracts were tested. D...

Compounds Used-N”l-Acetyl-n-ornithine was synthesized as previously described (5, 3).’ L-Ornithine monohydrochloride was obtained from the Mann Research Laboratories. Several of the acetylamino acids used, including acetyl-nn-methionine, were supplied by the California Foundation for Biochemical Research.2 Organisms-The organisms used are E. coli (ATCC 9637) and ornithinerequiring mutant 160-37...

Ultrasonically nebulized distilled water-induced bronchoconstriction (UNDW-IB) is specific to asthma. The mechanisms underlying UNDW-IB are not fully understood, and no reproducible animal model has been reported. The purpose of this study was to develop a guinea-pig model of UNDW-IB. Ultrasonically nebulized distilled water (UNDW) was inhaled 20 min after an aerosolized antigen challenge in pa...