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Thymol (also known as 2-isopropyl-5-methylphenol, IPMP), C 10 H 14 O, is a natural monoterpenoid phenol derivative of p-Cymene, isomeric with carvacrol.It occurs naturally in the oil of thyme, and it is extracted from Thymus vulgaris (common thyme), ajwain, [4] and various other plants as a white crystalline substance of a pleasant aromatic odor and strong antiseptic properties.
Free response tests are a relatively effective test of higher-level reasoning, as the format requires test-takers to provide more of their reasoning in the answer than multiple choice questions. [4] Students, however, report higher levels of anxiety when taking essay questions as compared to short-response or multiple choice exams.
No points were taken away for blank answers. However, the College Board discontinued the policy for all AP Exams in 2011; now, they only award 1 point for each correct answer, with no 1/4 point deductions. The free-response section is scored individually by hundreds of educators each June. Each essay is assigned a score from 0–6, 6 being high.
Fragrance bottles. An aroma compound, also known as an odorant, aroma, fragrance or flavoring, is a chemical compound that has a smell or odor.For an individual chemical or class of chemical compounds to impart a smell or fragrance, it must be sufficiently volatile for transmission via the air to the olfactory system in the upper part of the nose.
In air, terpenoids are converted into various species, such as aldehydes, hydroperoxides, organic nitrates, and epoxides [11] by short-lived free radicals (like the hydroxyl radical) and to a lesser extent by ozone. [12] These new species can dissolve into water droplets and contribute to aerosol and haze formation. [13]
Advanced Placement (AP) International English Language (also known as APIEL) is an AP Examinations course managed by Educational Testing Service (ETS) with the sponsorship of the College Board in New York. [1] It is designed for non-native speakers to prepare for studying in an English-speaking university, particularly in North America.
Mercaptan is a harmless chemical that smells like sulfur or rotten eggs that utility companies add to natural gas to make it easier to detect leaks, according to Healthline, a medical information ...
Thymol blue (thymolsulfonephthalein) is a brownish-green or reddish-brown crystalline powder that is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions.