946 resultados para valet 1948


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Descreve a viagem de observação feita ao Planalto Central por integrantes da Comissão Especial da Mudança da Capital da República em novembro de 1948, com o objetivo de conhecer as zonas fixadas e examinadas pela Comissão de Estudos para Localização da Nova Capital, presidida pelo general Djalma Polli Coelho.

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Parte 1 - Atos do Poder Legislativo

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2 cartas (mecanografiadas) ; 210x270 mm. Ubicación: Caja 1 - Carpeta 18

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1 carta (mecanografiada) ; 225x160mm. Ubicación: Caja 1 - Carpeta 45

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10 cartas (mecanografiadas) ; entre 210x150mm y 222x280mm. Ubicación: Caja 1 - Carpeta 76

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11 cartas (mecanografiadas y manuscritas) ; entre 150x215mm y 220x260mm

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The present work appertains to a series of investigations in the field of trophodynamics of water bodies conducted by the department of hydrobiology ”Mosrybvtuza” under the leadership of Prof. Director N.S. Gaevska. Usually with quantitative collections of benthos ostracoda are hardly taken account of. But with the employment of special methods it is possible to be convinced that they are encountered in massive numbers. The role of ostracods in the nutrition of fish is recognised as important by many authors. On the question of the feeding of ostracods, in the literature there are only the fragmentary indications about the occurrence in the gut of ostracods of algae (diatoms, desmids) and detritus. The study of the feeding of ostracods was conducted both by the method of dissecting the guts of ostracods taken from natural waters, and by the method of feeding ostracods under laboratory conditions with a variety of food objects. Moreover, with a view to revision of obtained quantitative data, for determination of food requirements of ostracods the respiration method was applied.

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In the extremely severe winter of 1946-47 the surface of the Pfaffikersee (near Zurich) lay under an unbroken seal of ice for a full three months. The number of wild ducks resting in this location was estimated to be about 400. Six samples of excrements of ducks were microscopically analysed and fragments of algae were identified. These analyses allow the expert to specify with definite certainty the feeding areas under investigation of the studied birds.

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The efficiency of utilisation of the sun's radiation by natural communities has not been properly demonstrated with what so far has been obtained of reliable values, and it represents a great interest in many respects. A systematic study of the biotic balance of lakes was done in the course of a succession of summers starting in 1932, extensive material was obtained, which permitted to compute a value fear the utilisation of the sun's radiation by plankton in lakes, and to compare this with corresponding values for marine plankton and terrestrial vegetation.

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There is at the moment no direct method of determining the organic matter content of natural waters. In 1940/41 8 different water bodies in central Russia were studied and their organic matter identified. The author concludes that there is currently no easy method to determine organic matter in water. A number methods need to be applied.

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11 cartas + 1 fragmento (mecanografiadas) ; entre 215x135mm y 210x295mm.

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16 cartas + 1 tarjeta postal (manuscritas y mecanografiadas) ; entre 210x300mm y 150x105mm