منابع مشابه
Free-radical chemistry of cigarette smoke and its toxicological implications.
Cigarette smoke contains two very different populations of free radicals, one in the tar and one in the gas phase. The tar phase contains several relatively stable free radicals; we have identified the principal radical as a quinone/hydroquinone (Q/QH2) complex held in the tarry matrix. We suggest that this Q/QH2 polymer is an active redox system that is capable of reducing molecular oxygen to ...
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Knowledge of the mechanism of formation, levels and toxicological profiles of the chemical products in the aerosols (i.e., vapor plus particulate phases) of e-cigarettes is needed in order to better inform basic research as well as the general public, regulators, and industry. To date, studies of e-cigarette emissions have mainly focused on chromatographic techniques for quantifying and compari...
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The introduction (and widespread use) of credit cards increases trading efficiency but, by also increasing the velocity of money, it causes massive inflation, in the absence of monetary intervention. If the monetary authority attempts to restore pre-credit card price levels by reducing the money supply, it will have to sacrifice all the efficiency gains. When there is default on credit cards, t...
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We are given four cards, each containing four nonnegative real numbers, written one below the other, so that the sum of the numbers on each card is 1. We are allowed to put the cards in any order we like, then we write down the first number from the first card, the second number from the second card, the third number from the third card, and the fourth number from the fourth card, and we add th...
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We use the decision by 14 states to remove credit card interest rate caps after the U.S. Supreme Court's 1978 Marquette decision as a natural experiment to explore the impact of credit card availability on black entrepreneurship. Using self-employment as a measure of entrepreneurship, we use Current Population Survey data from 1971-1985 to show that removing state-level rate caps led to increas...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1937
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed014p394.2