Native Specie
Mostrando 25-34 de 34 artigos, teses e dissertações.
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25. Aspectos fisiolÃgicos da germinaÃÃo de sementes de sucupira-preta (Bowdichia virgilioides Kunth) / Physiological aspects of black sucupira seed germination (Bowdichia virgilioides Kunth.)
Bowdichia virgilioides is tree specie with broad dispersion in Brazil, being highly used in refloresting prgrams and recovery of the degraded areas. This specie is suffering a reduction in number in its native habitat, due the desordered commercial exploration. Inaddition to this fact, the seedling formation could be limited based in the germination conditio
Publicado em: 2006
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26. A comunidade de peixes dos reservatórios dos trechos médio e baixo rio Tietê, com ênfase nas espécies Plagioscion squamosissimus e Geophagus surinamensis. / Fish community of the reservoirs located on middle and low Tietê River, with emphasis in the introduced species Plagioscion squamosissimus and Geophagus surinamensis.
From sixties, the fish species introduction has been being a constant event in the reservoir system located on middle and low Tietê River - SP, which resulted the success introduction of Plagiosicon squamosissimus and Cichla cf. ocellaris in all these reservoirs. According to this context, the present work objectified characterize the fish community, with f
Publicado em: 2006
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27. Análise da presença de agentes mutagênicos nas águas do Rio Pitimbú/RN
The Pitimbu River is located at the oriental portion of the State of Rio Grande do Norte, including three importants cities named Macaíba, Parnamirim e Natal. Although its high importance as a water source, which supplys great part of the South Zone of the Natal city, this river receives a large quantity of domestic and industrial waste water without treatm
Publicado em: 2006
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28. Genetic identity among rubber tree (Hevea spp.) clones, from different origins, based on RAPD markers. / Identidade genÃtica de clones de seringueira (Hevea spp), de diferentes procedÃncias, baseada em marcadores RAPD.
The rubber tree (Hevea spp.) is a native specie from amazon region, and represent the largest source of natural rubber in the world. In order to find more favorable conditions for its cultivation and to increase the production of natural rubber, the rubber tree crop has had an expansion to other Brazilâs regions. In these regions the sources of genetic mate
Publicado em: 2006
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29. Blends of agar/galactomannan for Marubakaido apple rootstock shoot proliferation
Galactomannans (GMs) extracted from seeds of a native Brazilian specie designated Cassia fastuosa (cassia) and from Cyamopsis tetragonolobus (guar gum - a commercial GM) were mixed with agar, in the proportion of 3/3 g.L¹ (w/w), and used as a gelling agent in Marubakaido apple rootstock (Malus prunifolia Borkh) micropropagation. The rheological measurements
Polímeros. Publicado em: 2005-06
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30. ESTUDO DOS ASPECTOS REPRODUTIVOS EM Luehea divaricata Martius (AÇOITA-CAVALO) / STUDIES OF REPRODUCTION ASPECTS IN AÇOITA-CAVALO (Luehea divaricata Martius)
The Luehea divaricata Martius (açoita-cavalo) is a tree of Tiliaceae family that is of the interest of industries due to wood the quality and also reflorestation programs. Studies about propagation are justified mainly when working with native plants, that have few research results. Two studies were conducted about specie propagation: one vegetative way and
Publicado em: 2005
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31. DISTRIBUIÇÃO DA VARIABILIDADE GENÉTICA EM POPULAÇÕES NATURAIS DE Baccharis trimera (Less) DC. (CARQUEJA) NO SUL DO BRASIL. / GENETIC VARIABILITY DISTRIBUTION IN NATURAL POPULATIONS OF Baccharis trimera (Less) DC. (CARQUEJA) IN SOUTHERN BRAZIL
Carqueja (Baccharis trimera) is a native plant from South America, occurs in several settings, it is highly employed in popular medicine, and has been explored under a grasping way. This study had the purpose of producing information for the establishment of adequate strategies to the conservation of genetic resources of this specie. Assuming this, one searc
Publicado em: 2004
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32. Analise quantitativa, duração do ciclo do epitelio seminifero e produção espermatica do testiculo do gerbilo da Mongolia (Meriones unguiculatus)
The gerbil (Meriones unguiculatus) is a rodent native of the arid regions of Mongolia and China, is of special interest in biomedical research and has been bred in laboratory since 1960. Studies on the structure and function of the gerbil testis are sporadic and, moreover those on spermatogenesis are rare. This is the first study to perform a more detailed i
Publicado em: 2003
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33. Distribuição do maracanã-verdadeiro Primolius maracana (psittacidae): preferência de hábitat e fatores que influenciam na manutenção de sua populações remanescentes. / Distribution of blue-winged macaw primolius maracanã: habitat preferences and factors affecting the persistence of its remaining populations.
The blue-winged macaw is a vulnerable psittacidae, which has been suffering a rapid reduction of its populations in different parts of its occurrence. Thus, it was carried a detailed revision on the, historical and current, distribution and estatus of the species through using literature and specimens in museums data. We gathered 176 records of blue-winged m
Publicado em: 2003
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34. Growth periodicity and formation of wood of some tree species of semideciduous seasonal forest in the southeast region of the state of São Paulo. / Periodicidade do crescimento e formação da madeira de algumas espécies arbóreas de florestas estacionais semidecíduas da região sudeste do estado de São Paulo.
The dendrocronology and dendroclimatology studies are now being used in the tropical and subtropical Brazilian forest. These studies are important to correlate the growth rate of forest species with climatic conditions and phenological behaviour to determine the age of the trees. This way, this investigation had as main objectives: (i) study the cambial peri
Publicado em: 2002