Strana 1 od 71 výsledky
This paper reports a measurement system for monitoring the gas concentrations of ethylene oxide (EO) within sterilizers. It samples gas from the sterilizer chamber at a constant flow into a microwave cavity spectrometer. The pressure in the cavity of the spectrometer is linearly proportional to that
OBJECTIVE
The aim of this study was to investigate the effect of the cavity thickness and smear layer on apical sealing ability of mineral trioxide aggregate (MTA) as a root-end filling material.
METHODS
Seventy single-rooted maxillary central teeth were used in this study. All teeth were
We prepared lysozyme-imprinted polymers bearing modifiable sites within the imprinted cavity to introduce various functional groups via post-imprinting modifications. For this purpose, ({[2-(2-methacrylamido)-ethyldithio]-ethylcarbamoyl}-methoxy)acetic acid (MDTA), which has a carboxy group to
The chronic inhalation toxicity and carcinogenicity of ethylene oxide (EO) and propylene oxide (PO) were evaluated in a 2-year inhalation bioassay. Five groups of male weanling Fischer 344 rats, 80 per group, were exposed at 0 ppm (shared control; filtered air), 50 ppm EO, 100 ppm EO, 100 ppm PO, or
The present work discusses the grafting by electron beam irradiation of poly(ethylene oxide) (PEO) star-shaped polymers onto porous expanded polytetrafluoroethylene (EXPTFE) surfaces. The resulting materials are intended to combine the good biocompatible properties of PEO with the outstanding
We have applied the micronucleus (MN) assay to exfoliated cells of buccal and nasal cavities to monitor the genotoxic risk in a group of workers exposed to chromic acid and in another group exposed to ethylene oxide (EtO). The first group comprised 16 subjects working in a 'hard' type chrome-plating
A total of 3475 subjects, engaged in such production for 2-20 years, were annually and before starting work examined by clinical and x-ray methods; 2427 of these were regularly exposed to ethylene oxide (the main group). X-Ray examinations included roentgenomorphologic (total fluorogram of the
Poly(ethylene oxide) (PEO) has long been used as an additive in toothpaste, partly because it reduces biofilm formation on teeth. It does not, however, reduce the formation of dental calculus or support the remineralization of dental enamel or dentine. The present article describes the synthesis of
A biodegradable multi-arm polymer β-cyclodextrin-poly (ε-caprolactone) (CD-PCL) with a ``jellyfish-like'' structure was obtained, in which flexible and hydrophobic PCL arms were selectively grafted to the wide side of the hydrophilic torus-shaped β-CD. The amphiphilic "jellyfish-like'' polymer with
Mucoadhesive buccal films (MBFs) provide an innovative way to facilitate the efficient site-specific delivery of active compounds while simultaneously separating the lesions from the environment of the oral cavity. The structural diversity of these complex multicomponent and mostly multiphase
This work presents the use of an ultra-low-cost and flexible paper-based microplasma array to perform maskless patterning of poly(ethylene oxide)-like (PEO-like) thin films with a feature size down to submillimeter scale. In this process, the liquid precursor was directly applied to the paper
For in situ studies into caries prevention, sterilization of tooth samples is essential. However, sterilization may influence the caries process itself. The aim of this study was to assess the effect of sterilising sound human enamel and dentin with ethylene oxide on lesion depth and mineral loss
The poly(ethylene oxide)(PEO)-alkali cation interaction is widely used in many areas. The conformation of the PEO-alkali cation has been studied extensively, but the conformational mechanism is still unclear. Simulations have been used to explain the mechanism, but there is a lack of A series of inclusion complexes of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO) with beta-cyclodextrin (beta-CD) was prepared. Their formation, structure, and dynamics were investigated by solution two-dimensional rotating-frame Overhauser effect
OBJECTIVE
The purpose of this study was to determine if ethylene oxide could sterilize extracted human teeth to be used in research.
METHODS
An occlusal preparation was cut in freshly extracted molars and a small hole was drilled into the pulp chamber. A suspension of Bacillus subtilis (globigii)