Incorporation of Oxygen into Abscisic Acid and Phaseic Acid from Molecular Oxygen

Incorporation of oxygen into abscisic Acid and phaseic Acid from molecular oxygen.

Abscisic acid accumulates in detached, wilted leaves of Xanthium strumarium. When these leaves are subsequently rehydrated, phaseic acid, a catabolite of abscisic acid, accumulates. Analysis by gas chromatography-mass spectrometry of phaseic acid isolated from stressed and subsequently rehydrated leaves placed in an atmosphere containing 20% (18)O(2) and 80% N(2) indicates that one atom of (18)...

Incorporation of tritium from [(4R)-4-3H]mevalonate into abscisic acid.

Biosynthesis of abscisic acid: incorporation of radioactivity from [2-14C]mevalonic acid by intact fruit.

Oxygen and acid-base parameters

A complete pH and blood gas analysis of arterial and mixed venous blood may comprise more than forty different quantities. We have selected sixteen, including patient temperature. The arterial oxygen tension group includes the oxygen tension, fraction of oxygen in inspired air, and fraction of mixed venous blood in the arterial (total physiological veno-arterial shunting). The haemoglobin oxyge...

Selective oxidation of propane to acrylic acid with molecular oxygen

This review covers the recent developments and the present state of selective oxidation of propane to acrylic acid with molecular oxygen. The current commercial manufacturing process of acrylic acid, as well as the possible oxidation pathways of propane are included as background information. Special attention is given to three classes of leading catalysts: vanadium pyrophosphate, heteropoly ac...