Nutritional prevention of coronary artery disease. A brief history of dietetics.
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Biomedical subjects
Publications and source records attributed to D Lippi.
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The history of the different interpretations of the so-called Hippocratic oath are examined in the frame of recent studies, putting in light the actual state of researches in the development of medical ethics.
Health care undergoes a deep transformation between XIVth and XVIth century; in the states of Central and Northern Italy very advanced health is practiced and magistratures are established, to face recurring pandemics of Black Death. At the same time, charitable institutions of medioeval tradition lose the role of generic assistance, to assume treatment of infirmi, with an ever-growing specialization. The author examines particularly the situation in Tuscany and in Florence, considering the evolution of health care in the Renaissance.
One of the most ancient descriptions of arterial aneurysm occurs in a paragraph of the Ebers Papyrus: Egyptians considered it a consequence of a vascular lesion and treated it surgically, through an instrument, which had to be previously cauterized on fire.
In the Archaeological Museum in Florence, there is a medical amulet which is made of haematite and shows the reproduction of the womb, with four divinities and inscriptions, which can be considered a peculiar evidence of anatomical knowledge of the past.
The problem of broad bean's syndrome and lathyrism in ancient Greece has been deeply studied, with particular referrement to the hypothetic medica and mystical reasons of the Pythagoric order not to eat broad beans. It is impossible to prove Egyptian influence of Phythagora's precept, but we can, however, consider the hypothesis that they had noticed the potential deadly effect of broad beans' use, too, and wonder if their interduction had the same motivations.
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Growth, acetylene reduction, and respiration rate were studied in batch and continuous cultures of Arthrobacter fluorescents at different oxygen partial pressures. The optimum pO2 values for growth and acetylene reduction were 0.05 and 0.025 atm, respectively, but microorganisms can tolerate higher pO2 values. The growth of cultures provided with combined nitrogen was dependent on oxygen availability, and strict anaerobic conditions did not support growth. Acetylene reduction of a population grown in continuous culture and adapted to low pO2 (0.02 atm) was much more sensitive to oxygenation than that of a population adapted to high pO2 (0.4 atm). Their maximum nitrogenase activity, at their optimal pO2 values, were quite different. The respiratory activity of nitrogen-fixing cultures increased with increasing oxygen tensions until a pO2 of 0.2 atm. At higher pO2 values, the respiration rate began to decrease.
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