PS268 Study Guide - Quiz Guide: Camellia Sinensis, Dichloromethane, Instant Coffee
CHAP 11: CAFFEINE
-mild stimulant, falling into same class as amphetamine and cocaine
-belongs to methylxanthine (xanthine) biochemical family
-unique xanthine in chocolate is theobromine, similar to caffeine but less potent
-DSM-5 includes caffeine withdrawal as new disorder
-British Act that taxed tea fuelled America's desire for coffee
-commercial roasting started in 1790 in NYC and spread through NA
-green coffee bean can be stored indefinitely, roasted bean deteriorates within a month
-decaffeinating done by soaking unroasted beans in organic solvent (methylene chloride, cancerous)
-caffeine taking out of coffee is used in soft drinks
-Tims captures 76% of coffee market in Canada
Coffea Arabica: milder flavour, require tropical climate, longer to grow, more expensive/desirable
Robusta: stronger, more bitter, higher caffeine, used in less expensive blends, instant coffee
Tea:
-grows on bushes in mountains of China, Sri Lanka, India, and Indonesia
-leaves dried, rolled, and placed in cool damp place for fermentation/oxidation to occur which turns
leaves copper (nonoxidized tea sold as green tea, oxidized = black tea, 98% of tea consumed in NA)
-oolong tea is partially oxidized and is greenish-brown
-tea contains amino acids and antioxidants-flavonoids (improve health, highest in black tea)
-black tea made of leaves from Camellia sinensis, has highest caffeine content and health benefits
linked to lowering cholesterol, reducing stroke risk, protecting lungs from smoke damage
-orange pekoe is high quality and only made from best part of tea leaf, higher caffeine/antioxidants
-at equal weights, tea has more caffeine than coffee but more tea can be made from less leaves
Document Summary
Mild stimulant, falling into same class as amphetamine and cocaine. Unique xanthine in chocolate is theobromine, similar to caffeine but less potent. British act that taxed tea fuelled america"s desire for coffee. Commercial roasting started in 1790 in nyc and spread through na. Green coffee bean can be stored indefinitely, roasted bean deteriorates within a month. Decaffeinating done by soaking unroasted beans in organic solvent (methylene chloride, cancerous) Caffeine taking out of coffee is used in soft drinks. Tims captures 76% of coffee market in canada. Coffea arabica: milder flavour, require tropical climate, longer to grow, more expensive/desirable. Robusta: stronger, more bitter, higher caffeine, used in less expensive blends, instant coffee. Grows on bushes in mountains of china, sri lanka, india, and indonesia. Leaves dried, rolled, and placed in cool damp place for fermentation/oxidation to occur which turns leaves copper (nonoxidized tea sold as green tea, oxidized = black tea, 98% of tea consumed in na)
