Page 119 - Miracles Within the Molecule
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even if sur fa ces fit togeth er per fect ly, it will be impos si ble to secure a
suf fi cient prox im i ty among their mol e cu les.
The secret of glue is that its adhe sive mol e cu les form a bond
between the mol e cu les on two sur fa ces and thus helps bind them
togeth er. Particularly in a liq uid state, glue pro vides the nec es sa ry close -
ness for Van der Waals force to emerge. The force that emer ges when
this close ness is great by itself and the solid i fied glue pre vents nobody
the bro ken frag ments from part ing again.
How You Taste Molecules
The taste you per ceive when you bite an apple is
famil iar. Even if we don't see the apple, you
would know that you're eat ing one, because
there are some 9,000 taste buds on your
tongue—mutu al ly com pat i ble epi the li al
cells divid ed into groups of 50 or 100,
which pos sess a small num ber of nerve
end ings. In that respect the sense of
taste dif fers from the taste of smell,
because in the sense of smell, the
recep tors are at the same time
nerve end ings. 53 The taste-
recep tor cells, on the other
hand, have dif fer ent func -
tions. One region of the
tongue is respon si ble for
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