PS268 Lecture 6: PS268 Lesson 6 October 30, 2017 Caffeine
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Caffeine (cid:1010). (cid:1005) caffei(cid:374)e: the wo(cid:396)ld(cid:859)s most co(cid:373)(cid:373)o(cid:374) ps(cid:455)(cid:272)hosti(cid:373)ula(cid:374)t. Coffee, tea and chocolate naturally contain xanthines (caffeine, theophylline, and theobromide) Some individuals prefer to consume these products (cid:862)de(cid:272)affei(cid:374)ated(cid:863) a(cid:374)d the(cid:396)e a(cid:396)e a fe(cid:449) procedures described in the textbook by which caffeine can be removed from, for example, the coffee bean. The isolated caffeine is then used to caffeinate beverages which normally do not have caffeine, including colas (like coke(cid:895) a(cid:374)d (cid:862)e(cid:374)e(cid:396)g(cid:455) d(cid:396)i(cid:374)ks(cid:863) The two graphs below illustrate daily coffee and tea consumption. The next graph illustrates the daily consumption of chcolate each day by university students. As you can see, university students, by-and-large a(cid:396)e (cid:374)ot (cid:862)(cid:272)ho(cid:272)aholi(cid:272)s(cid:863) Whe(cid:396)eas (cid:272)offee, tea a(cid:374)d (cid:272)ho(cid:272)olate (cid:374)atu(cid:396)all(cid:455) (cid:272)o(cid:374)tai(cid:374) (cid:272)affei(cid:374)e, (cid:373)a(cid:374)(cid:455) othe(cid:396) (cid:862)(cid:272)affei(cid:374)ated(cid:863) beverages contain caffeine only because caffeine was added during manufacturing. O(cid:373)e (cid:272)olas a(cid:374)d so(cid:373)e (cid:858)e(cid:374)e(cid:396)g(cid:455) d(cid:396)i(cid:374)ks(cid:859) fall u(cid:374)de(cid:396) this (cid:272)atego(cid:396)(cid:455) (cid:894)although so(cid:373)e (cid:858)e(cid:374)e(cid:396)g(cid:455) dri(cid:374)ks(cid:859) ha(cid:448)e as a(cid:374) i(cid:374)g(cid:396)edie(cid:374)t the jola (cid:374)ut, (cid:449)hi(cid:272)h (cid:272)o(cid:374)tai(cid:374)s (cid:272)affei(cid:374)e(cid:895)
