Exp 5

Question 1

Two main principal varieties of tea plants

Answer 1

Small leaved china plant
Large leaved assam plant

Question 2

Small leaved china plant scientific name

Answer 2

Camellia sinensis sinensis

Question 3

Large leaved assam plant scientific name

Answer 3

Camellia sinensis assamica

Question 4

Unfermented teas

Answer 4

Green tea

Question 5

Fermented tea

Answer 5

Black tea

Question 6

Partially fermented tea

Answer 6

oolong

Question 7

A member of the class called alkaloids

Answer 7

caffeine

Question 8

In which class does caffeine belong

Answer 8

alkaloids

Question 9

What are examples of caffeine

Answer 9

Cocoa beans
Coffee beans
Kola nuts
Tea leaves

Question 10

Formula of caffeine

Answer 10

C8H10N402

Question 11

What is the IUPAC name of caffeine

Answer 11

1,3,7 trimethylxanthine

Question 12

Caffeine is a stimulant for (3)

Answer 12

CNS
Heart
respiration

Question 13

Caffeine pharmacologic effect

Answer 13

Stimulant
diuretic

Question 14

Caffeine can cause

Answer 14

Insomnia
Headaches
nervousness

Question 15

tea leaves composition

Answer 15

caffeine
ceullulose
small amount of chlorophyll
tannins

Question 16

a water insoluble polymer of glucose

Answer 16

cellulose

Question 17

how is caffeine extracted from water with

Answer 17

with dichloromethane (methylene chloride)

Question 18

anhydrous sodium sulfate or -

Answer 18

calcium chloride

Question 19

how is solid/liquid extraction done

Answer 19

using soxhlet extractor or by brewing a cup of tean

Question 20

in order to get the solid natural product into the liquid solvemt

Answer 20

solid/liquid extraction

Question 21

isolate the desired reaction compounds from the natural product

Answer 21

liquid/liquid extraction

Question 22

liquid/liquid extraction can be

Answer 22

neutral or acid/base

Question 23

Caffein extraction is

Answer 23

acial base liquid/liquid extraction

Question 24

ideal solvent should be

Answer 24

low BP
not react with the solute other solvents
not toxic or highly flammable
not be miscible with water
be inexpensive
readily dissolve caffeine

Question 25

Common liquid/liquid solvent pair for the extraction of caffeine is

Answer 25

water-dichloro methane

Question 26

Caffeine layer is located

Answer 26

below the aqueous layer ## footnote in our experiment it was above liquid w lower density is above

Question 27

______ of the solvent, dichloro methane, would leave a crude version of caffeine

Answer 27

evaporation

Question 28

______ would produce more pure version of caffeine

Answer 28

sublimation

Question 29

method to purity caffeine

Answer 29

sublimation

Question 30

caffeine can also be extracted by using

Answer 30

a vacuum filtration

Question 31

Caffeine is metabolized in and by the??

Answer 31

in the liver by the cytochrome P450

Question 32

what specific cyp?

Answer 32

CYP1A2

Question 33

Disadvantages of caffeine

Answer 33

Anxiety causes physical dependance sleep disturbances

Question 34

Caffeine advantages

Answer 34

exercise performance improving alertness learning capacity

Question 35

E FSA meaning

Answer 35

European Food safety Authority

Question 36

caffeine intake advise

Answer 36

400 mg per day and single doses of 200 mg

Question 37

single doses it _____mg may increase sleep latency and reare sleep duration in some adult individuals, particularly when consumed close to bedtime

Answer 37

100 mg