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Minor alterations of the chemical structure of the more familiar drugs often produce compounds with unusual and, in some cases, paradoxical effects. Since the late 19th century the morphine radical has been modified repeatedly by different workers. Some of the more familiar products of this...
In the closed system of administering anesthesia, the patient is required to breathe into the machine and to inhale, unless modifications of the gaseous mixture are brought about, what he has previously exhaled. During respiration, the air is changed in three ways that might prompt one to modify...
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