Oxygen preparations

C. W. Scheele and J. Priestley independently discovered oxygen, prepared it by several routes, and studied its properties. 

Oxidation of SjNj with Molecular Oxygen Preparation of SjNjO" (x = 1,2)... 

Dissolve deglycosylated ricin A chain (dgA) in 0.1 M sodium phosphate, 0.15 M NaCl, 10 mM EDTA, pH 7.5, at a concentration of 10 mg/ml. The buffer should be degassed under vacuum and nitrogen bubbled through it to remove oxygen. Prepare half the amount of A-chain solution as the amount of antibody prepared... 

Enol and enolate reactions at oxygen preparation of enol ethers... 

In 1892 Rayleigh1 employed hydrogen and oxygen prepared by electrolysis. As the mean of nineteen experiments with hydrogen and eleven with oxygen, he found the ratio of the densities to be... 

In 1897 Thomsen 1 employed the aluminium method already cited (p. 43), and determined the weight of a normal litre of hydrogen to be 0 089947 0 000012 gram, and the corresponding weight of oxygen, prepared from potassium chlorate, to be 1 42906 0 00004 grams. The ratio of the densities is... 

The solubility of potassium superoxide KOz in liquid ammonia has been measured from —75 to -40 °C. Equilibrium in the system was slow, taking 3.5—4 h. At —40 °C, 0.024 + 0.003 g of 92% pure KOz dissolves in 100 cm3 of ammonia.155 On heating mixtures of K02 with lithium perchlorate, cation exchange occurs between the components, accompanied by liberation of oxygen. At 250—300 °C the mixture melts with evolution of oxygen. At 360—500 °C, perchlorate is also decomposed. These melts are recommended for oxygen preparation.156... 

Oeettrrenee.—Found only in combination with oxygen. Preparation, a. Amorphous boron.—1. By igniting borio anhydride with sodium —... 

A., A penta-indium oxo alkoxide cluster with a central 5-co-ordinate oxygen. Preparation and X-ray crystal structure of (InO Pr)5(p2-0 Pr)4(p3-OPr)4( i-50), J. Chem. Soc. Chem. Commun. 1258 (1988). 

ENOL AND ENOLATE REACTIONS AT OXYGEN PREPARATION OF ENOL ETHERS... 

Severe allergic accidents can occur (tachycardia, severe hypotension) and radiologists and technicians should be aware of first-aid principles (good venous access, perfusion of saline solution, oxygen, preparation of a syringe of diluted adrenaline). The emergency phone number should be visible from anywhere in the CT suite and dialed as soon as possible. Adrenaline can induce severe side effects. For this reason, it would be safer to have only anesthesiologists administer it. 

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