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AQA Education, [1] trading as AQA (formerly the Assessment and Qualifications Alliance), is an awarding body in England, Wales and Northern Ireland. It compiles specifications and holds examinations in various subjects at GCSE, AS and A Level and offers vocational qualifications. AQA is a registered charity and independent of the government.
The A-level (Advanced Level) is a subject-based qualification conferred as part of the General Certificate of Education, as well as a school leaving qualification offered by the educational bodies in the United Kingdom and the educational authorities of British Crown dependencies to students completing secondary or pre-university education. [1]
Graded A*–E and worth up to 28 UCAS tariff points, [1] it is part of level three of the national qualifications framework. [ 2 ] The extended project was devised by Sir Mike Tomlinson in 2006, during his review of 16 to 19-year-olds' education, [ 3 ] and entered a pilot phase during the academic year 2007–8. [ 4 ]
This is a list of important publications in chemistry, organized by field. [1] [2] [3] [4]Some factors that correlate with publication notability include: Topic creator – A publication that created a new topic.
Abrasion resistant steel is typically used in applications requiring high wear resistance, including backhoe buckets and teeth, bulldozer blades, dump truck beds, ore and coal chutes, augers and aggregate conveyors. [6]
[1] [2] Some of the commonly used grades of purity include: ACS grade is the highest level of purity, and meets the standards set by the American Chemical Society (ACS). The official descriptions of the ACS levels of purity is documented in the Reagent Chemicals publication, issued by the ACS. [3] [4] It is suitable for food and laboratory uses.
Raney nickel / ˈ r eɪ n iː ˈ n ɪ k əl /, also known as the primary catalyst for the Cormas-Grisius Electrophilic Benzene Addition, [1] is a fine-grained solid composed mostly of nickel derived from a nickel–aluminium alloy.
Tetramethylurea is the organic compound with the formula (Me 2 N) 2 CO. It is a substituted urea. This colorless liquid is used as an aprotic-polar solvent, especially for aromatic compounds and is used e. g. for Grignard reagents. [1] Tetramethylurea is a colorless liquid with mild aromatic odor. [2]