A Comparative and Experimental Study of Bacilli Producing Red Pigment

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Page 3 - Lucian, in one of his dialogues (2d century AD), makes Pythagoras give, as reason for forbidding his disciples to eat beans, the fact that white cooked beans, if placed in the moonlight, change into blood. Since the forbidding of beans as food is common to various sects of ancient times, eg to the Egyptian priests and to the Zoroastrians , from which latter Pythagoras doubtless obtained the notion, the recognition of this pigmentation appears to be of extreme antiquity. In the year 332 BC the socalled...
Page 43 - ... their conclusions, that the essential conditions of pigment production include : a free supply of oxygen ; a temperature of about 20 C. ; and a medium slightly alkaline to litmus. Mary Hefferan further concludes that, " There is probably little or no correlation between luxuriance or vigor of growth and the power of pigment formation. Hence pigment production does not appear to be essential to the life processes of an organism.
Page 53 - On certain bacteria from the air of New York City. (Ann. NY Acad.
Page 4 - ... often regarded as a miracle in the Middle Ages , was due to a similar cause. The composition of the sacramental bread, rich in starch and poor in acid, was well adapted to the rapid growth of Schizomycetes ; but the popular explanation of the phenomenon was that the host had been stabbed by unbelieving Jews.
Page 21 - The members of this group develop on agar a pigment in mass, which shows a large percentage of pure red, with varying quantities of orange and sometimes a small amount of blue, which gives a violet tinge, or of black. They are characterized by the fact that the amount of orange diminishes as the cultures age; at the same time there is an addition of black, i, e., the cultures grow darker. This group includes the "carmine", "blood red", and "violet red
Page 42 - ... character of the pigment is markedly constant among red chromogenic bacteria. By constancy is here understood the appearance of pigment of definite color upon nutritive media of known composition and under defined environmental conditions. 2) A collection of about forty red cultures selected at random...
Page 3 - BC the so-called blood miracle was of service to Alexander the Great in the conquest of Tyre. The bread of his besieging army was discovered to be reddened when broken; but the priests quieted the terrified soldiery by interpreting the omen to mean that as the "blood" was ins1de the bread, a bloody fate would fall upon those inside, not outside, the city.

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