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1,2,3,4-Butanetetracarboxylic acid is an organic compound with the formula HO 2 CCH 2 CH(CO 2 H)CH(CO 2 H)CH 2 CO 2 H. It is one of the simplest stable tetracarboxylic acids. The compound exists as two diastereomers, meso and the (R,R)/(S,S) pair. All are white solids. The compound is produced by oxidation of tetrahydrophthalic anhydride. [1]
General structure of 1,2-, 1,3-, and 1,4-dicarbonyls. In organic chemistry, a dicarbonyl is a molecule containing two carbonyl (C=O) groups.Although this term could refer to any organic compound containing two carbonyl groups, it is used more specifically to describe molecules in which both carbonyls are in close enough proximity that their reactivity is changed, such as 1,2-, 1,3-, and 1,4 ...
Repetition is the simple repeating of a word, within a short space of words (including in a poem), with no particular placement of the words to secure emphasis.It is a multilinguistic written or spoken device, frequently used in English and several other languages, such as Hindi and Chinese, and so rarely termed a figure of speech.
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varied by: 1) provision of general calorie recommendations, 2) provision of specific calorie information, and 3) whether high- or low-calorie items were more easily accessible. Results suggest that a strictly informational approach may be less effective than subtle guidance in enticing fast-food customers towards healthier meals.
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]
The 6-foot-1 quarterback had a meteoric rise to college success, as he was barely a 3-star recruit in the 2022 recruiting class, ranked the No. 1766 player overall and No. 119 quarterback ...
The man accused of killing UnitedHealthcare’s CEO in Manhattan remains in a Pennsylvania state prison and a possible indictment looms in New York as a grand jury considers evidence on charges he ...