Eksempler på oxygen

• Numerous substances are found in nature and in the body that function as protective agents against oxygen-free radicals.

• In each case, inversion of configuration was demonstrated using thio-substituted non-bridging phosphate oxygens.

• This effect allows oxygen to be released from the molecule at venous oxygen pressure.

• The results support a link between aerobic resistance and defective oxygen scavenging.

• Reproducibility of replicate analyses of standards was generally better than 0.1 for both carbon- and oxygen-isotope ratios.

• We note that since (2.20), the equation for oxygen tension, is quasi-steady, small jumps in the oxygen tension may appear between consecutive timesteps.

• However, we have observed that some exposure to atmospheric molecular oxygen may have limited, if any, effect on viability of certain methanogens.

• Thus, it appears that at least a few species of methanogens can tolerate atmospheric oxygen for relatively extended periods of time.