Results 111 to 120 of about 18,323 (221)

Fenología reproductiva de las especies que componen el dosel superior de bosques secundarios y primarios en la Región Huetar Norte, Sarapiquí, Costa Rica [PDF]

, 2007
Proyecto de Graduación (Licenciatura en Ingeniería Forestal). Instituto Tecnológico de Costa Rica, Escuela de Ingeniería Forestal, 2007.Se estudió la fenología reproductiva de las especies que componen el dosel superior de bosques secundarios con edades ...
Alvarado-Rojas, Wendy
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Incidence of Extra-Floral Nectaries and their Effect on the Growth and Survival of Lowland Tropical Rain Forest Trees [PDF]

, 2013
Received the best poster in Organismal Biology award at the NMS Undergraduate Research ForumMutualistic relationships between organisms have long captivated biologists, and extra-floral nectaries (EFNs), or nectar-producing glands, found on many plants ...
Andrew, Muehleisen
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Calibration of tritium enrichment factor in solid-polymer electrolyte device based on correlation between deuterium and tritium

He jishu
BackgroundSolid-polymer electrolyte (SPE) water electrolysis has been widely used to concentrate low-level environmental tritium for measurements. It has the advantages of electrolyte elimination, infinite reduction ratio, high current, safety, and ...
WANG Chenxu, XUE Xiaochong, LIU Jiayu, ZENG Youshi, DENG Ke, ZHANG Qin, ZHU Lixiao, LIU Wei, GE Lixin   +8 more
doaj   +1 more source

The performance and capabilities of terrestial organisms in extreme and unusual gaseous and liquid environments [PDF]

Inhibitor effects of psilotin, MnO2, and D2O on substances existing in nature to determine performance of terrestrial organisms in extreme and unusual gaseous and liquid ...
Siegel, S. M.
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Litter Production in an Area of Amazonian Terra Firme Forest. Part I.Litter - fall, Organic carbon and total Nitrogen Contents of Litter').

, 1968
In 1963 anð, L964 litter was collected in a terra firme forest near Manaus, oven-dried and shipped to Europè. The sampleswere subdivided intofour litterfractions (leaves, wood,'fruits, termite fraction), dried at 105o and weighed.
Klinge, H.
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Metabólitos secundários de Protium heptaphyllum march [PDF]

Química Nova, 2002
Paulo Nogueira Bandeira, Otília Deusdênia Loiola Pessoa, Maria Teresa Salles Trevisan, Telma Leda Gomes Lemos   +3 more
doaj   +1 more source

Experimental study of the isotope effect of the permeability in structural steels for fusion reactors: Eurofer and SS316

Nuclear Materials and Energy
The transport of hydrogen isotopes through the elements that make up a fusion reactor, and their corresponding interaction with these materials, have a direct impact on its operation.
María Urrestizala, Jon Azkurreta, Natalia Alegría, Igor Peñalva, Marta Malo, Carlos Moreno, David Rapisarda   +6 more
doaj   +1 more source

Estrutura fitossociológica de uma área de cerradão em Canarana, Estado do Mato Grosso, Brasil = Phytosociological structure in a cerradão area in Canarana, Mato Grosso State, Brazil

Acta Scientiarum: Biological Sciences, 2009
Diante da intensa fragmentação e da escassez de estudos realizados emcerradão, este trabalho apresenta a estrutura da comunidade arbórea de um trecho desta fitofisionomia no Planalto Central. Foram demarcados todos os indivíduos lenhosos que apresentaram
Sustanis Horn Kunz, Natália Macedo Ivanauskas, Sebastião Venâncio Martins   +2 more
doaj  

Use of Essential Oils and α-Pinene as Insecticides against Sitophilus zeamais and Their Effects on Maize Seed Germination

Agronomy
This study aimed to assess the efficiency of the use of α-pinene and essential oils of Gaultheria procumbens, Juniperus communis, Protium heptaphyllum, and Protium pallidum in treating corn seeds (Zea mays) under storage conditions for the management of ...
Rodrigo de Carvalho Brito, Luiz Evaldo de Moura Pádua, Leticia Rodrigues da Silva, Marcus Eugênio Oliveira Briozo, Paulo Roberto Ramalho Silva, Luzineide Fernandes de Carvalho, Kamilla de Andrade Dutra, Daniela Maria do Amaral Ferraz Navarro, Douglas Rafael e Silva Barbosa, Mariano Oscar Aníbal Ibañez Rojas, Giovana Lopes da Silva, Mariana Oliveira Breda, Gutierres Nelson Silva, Tadeu Barbosa Martins Silva, Erlen Keila Candido e Silva, Solange Maria de França   +15 more
doaj   +1 more source

Importância fitossociológica de um fragmento de floresta ombrófila densa no estado de Roraima, Brasil

Agro@mbiente On-line, 2016
Objetivou-se com o presente trabalho caracterizar a fitossociologia de um fragmento de floresta nativa no município de Caroebe/RR, Brasil. Foram inventariadas todas as árvores com DAP ≥ 15 cm, em 18 parcelas permanentes de 15 x 20 m (300 m²).
Luiz Fernandes Silva Dionisio, Osmar Serra Bonfim Filho, Bruno Roberto de Souza Crivelli, Jefferson Peixoto Gomes, Marcelo Henrique Silva de Oliveira, João Olegário Pereira de Carvalho   +5 more
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