A blood substitute, of an extracellular haemoglobin having a molecular weight of approximately 3 to approximately 4 million daltons, comp sing chains of polymerised globins, containing free cysteines capable of binding to NO and/or SNO groups, and having a P.sub.50 of approximately 6 to approximately 7 mm Hg, and methods using the blood substitute.

 
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> Composition Comprising Natural Substances Having Healing, Repellent and Biocidal Properties for the Treatment and the Cure of External Wounds

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