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Glass ionomer. A glass ionomer cement ( GIC) is a dental restorative material used in dentistry as a filling material and luting cement, [ 1] including for orthodontic bracket attachment. [ 2] Glass-ionomer cements are based on the reaction of silicate glass-powder (calciumaluminofluorosilicate glass [ 3]) and polyacrylic acid, an ionomer.
In a fire, PVC can form hydrogen chloride fumes; the chlorine serves to scavenge free radicals, making PVC-coated wires fire retardant. While hydrogen chloride fumes can also pose a health hazard in their own right, it dissolves in moisture and breaks down onto surfaces, particularly in areas where the air is cool enough to breathe, so would ...
The gradual release of responsibility (GRR) model is a structured method of pedagogy centred on devolving responsibility within the learning process from the teacher to the learner. This approach requires the teacher to initially take on all the responsibility for a task, transitioning in stages to the students assuming full independence in ...
Lien waiver. In the mechanics lien process, a lien waiver is a document from a contractor, subcontractor, materials supplier, equipment lessor or other party to the construction project (the claimant) stating they have received payment and waive any future lien rights to the property (of the owner) for the amount paid.
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Ecology portal. v. t. e. A landfill[ a] is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was simply left in piles or thrown into pits (known in archeology as middens ...
This is a list of acronyms, expressions, euphemisms, jargon, military slang, and sayings in common or formerly common use in the United States Marine Corps.Many of the words or phrases have varying levels of acceptance among different units or communities, and some also have varying levels of appropriateness (usually dependent on how senior the user is in rank [clarification needed]).
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