The growth mechanism of spectinomycin dihydrochloride crystal in pure water and acetone-water mixture at different temperatures has been studied by induction period measurement. The induction period was measured visua...The growth mechanism of spectinomycin dihydrochloride crystal in pure water and acetone-water mixture at different temperatures has been studied by induction period measurement. The induction period was measured visually. The solid-liquid interfacial tension was determined on the basis of classical homogenous nucleation theory and the surface entropy factor was calculated. It was shown that the interfacial tension and surface entropy factor increased with the increase of acetone concentration and the decrease of temperature. It was demonstrated that the growth mechanism of spectinomycin dihydrochloride crystal was controlled by birth and spread growth in pure water or in acetone-water mixture at high temperatures and turned from birth and spread growth to spiral growth with the increase of acetone concentration in acetone-water mixture at low temperatures.展开更多
The research concerns Roman medical galactology, galaktologia iatrike （γαλακτσλσγια ιατρικη）, i.e. the ancient knowledge of milk and its by-products in medical procedures as described by Celsus in...The research concerns Roman medical galactology, galaktologia iatrike （γαλακτσλσγια ιατρικη）, i.e. the ancient knowledge of milk and its by-products in medical procedures as described by Celsus in his treatise entitled De medicina. The authors elaborate on the sources of Celsus＇ medical theory of milk, comment on the place of the Roman author＇s theory against the doctrinal background of other medical writers of the period, demonstrate pharmacological characteristics attributed to milk and milk-obtained products by Celsus, specify main cures in which milk and its by-products were made use of as either simple or compound medicines, give examples of the latter, delineate the progress of the theory on milk＇s medicinal use, and finally comment on the role of milk and milk-obtained products in the diet of the Mediterranean.展开更多
文摘The growth mechanism of spectinomycin dihydrochloride crystal in pure water and acetone-water mixture at different temperatures has been studied by induction period measurement. The induction period was measured visually. The solid-liquid interfacial tension was determined on the basis of classical homogenous nucleation theory and the surface entropy factor was calculated. It was shown that the interfacial tension and surface entropy factor increased with the increase of acetone concentration and the decrease of temperature. It was demonstrated that the growth mechanism of spectinomycin dihydrochloride crystal was controlled by birth and spread growth in pure water or in acetone-water mixture at high temperatures and turned from birth and spread growth to spiral growth with the increase of acetone concentration in acetone-water mixture at low temperatures.
文摘The research concerns Roman medical galactology, galaktologia iatrike （γαλακτσλσγια ιατρικη）, i.e. the ancient knowledge of milk and its by-products in medical procedures as described by Celsus in his treatise entitled De medicina. The authors elaborate on the sources of Celsus＇ medical theory of milk, comment on the place of the Roman author＇s theory against the doctrinal background of other medical writers of the period, demonstrate pharmacological characteristics attributed to milk and milk-obtained products by Celsus, specify main cures in which milk and its by-products were made use of as either simple or compound medicines, give examples of the latter, delineate the progress of the theory on milk＇s medicinal use, and finally comment on the role of milk and milk-obtained products in the diet of the Mediterranean.
