Biol1021 – Ivo Tews
Behavior of Biomolecules
Complex bonds, catalysis, electron chains:
The d-group transition metals
1
, History of the earth
• In a single day
Oxygen
Time: now 21%
↵
Slideshare.net 2
, 12 am to 4 am
• Big bang Oxygen consumed through
chemical weathering - through
oxidation of surfaces (e.g. rocks)
O2
Time: <0.2%
↵
3
Slideshare.net
, 4 am to 8 pm
• Single celled organisms, called stromatolittes,
begin to produce oxygen
O2
Time: <2%
0.7Ga
↵
Proterozoic
Archean
4
Hadean Slideshare.net
Behavior of Biomolecules
Complex bonds, catalysis, electron chains:
The d-group transition metals
1
, History of the earth
• In a single day
Oxygen
Time: now 21%
↵
Slideshare.net 2
, 12 am to 4 am
• Big bang Oxygen consumed through
chemical weathering - through
oxidation of surfaces (e.g. rocks)
O2
Time: <0.2%
↵
3
Slideshare.net
, 4 am to 8 pm
• Single celled organisms, called stromatolittes,
begin to produce oxygen
O2
Time: <2%
0.7Ga
↵
Proterozoic
Archean
4
Hadean Slideshare.net