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Vino de Maracuyá Parchita (Passifllora edulis)
Describe paso a paso de la elaboraci-n de uno de los vinos m+s sensuales y ex-ticos. Primer t'tulo de la colecci-n "Fermentados de Frutas Tropicales." De una manera breve y concisa se exponen mZtodos anal'ticos, pero tambiZn mZtodos r+pidos y sencillos para la preparaci-n esta singular bebida.
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Leonardo da Vinci's Paragone
Leonardo da Vinci's arguments for the supremacy of painting over the arts of poetry, music, and sculpture address issues that have been relevant to debates over the nature of representation since the time Plato discussed imitation until today, maintains Claire Farago in this wide-ranging critical analysis of the first important modern contribution to the comparison of the arts. This study systematically examines 46 passages compiled in the mid-sixteenth century from eighteen of Leonardo's notebooks and their relationship to the artist's holograph writings on painting, providing a critical transcription newly made from the Codex Vaticanus Urbinas 1270 and a new English translation with extensive notes that take into account Leonardo's scientific terminology, the highly contrived form of his rhetorical argumentation, and the role played by his original editors.
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Parvoviruses
I. Introduction Parvoviruses belong to the large group of viral agents of which virologists have become aware by chance in many biological materials due to the availabil ity of more sensitive isolation techniques and the extensive use of the electron microscope. In general, many of these viruses lacked the stimulating background of an infectious disease and, therefore, have fallen into oblivion already soon after discovery. In case of parvoviruses, however, interest has been maintained because of the circumstances under which most of them were isolated. A great number of parvoviruses has been recovered from tissues of tumor bearing animals, from cell-free filtrates of tumors, or from stable cell lines of tumor origin. These observations necessarily suggested the newly isolated viral agents of playing an important, yet unknown role in the induction and develop ment of cancer. On the other hand, further parvoviruses were found constantly associated with adenoviruses. It was the experimental analysis of the multiplica tion behaviour which then revealed that the association between parvoviruses and tumors or parvoviruses and adenoviruses originates from the basis of a cer tain genetic defectiveness. For some members of the group this may be overcome by cellular helper effects in rapidly growing tissues, for several others, however, by biochemical events in the simultaneously occurring replication of an adeno virus only. Additional points of view in favour of parvovirus research have arisen from experimental animal studies.
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