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| Registros recuperados: 36 | |
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| Mario, G.M.; Njisuh, Z. F.. |
| In this study we investigated how the use of mangrove wood for fish smoking by local people in some localities of the South West (SW) Province of Cameroon may be in conflict with the conservation and sustainability of mangrove ecosystems. With the use of socio-economic surveys, from February to July 2006, we established that the amount of the annual fuel-wood harvest for five study sites was about 102,650 m3 (i.e., an amount equivalent to clearing about 205.3 ha of mangrove forests annually). It is estimated that approximately 62% of this total is used to smoke most of the fish (i.e., about 90.7% of the fish landings) across the five study sites. The quantities of wood seemed to vary proportionately with fish landings across sites, hence indicating a... |
| Tipo: Journal Contribution |
Palavras-chave: Wood; Curing; Fish; Mangroves; Ecosystem management. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5477 |
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| Cruz, M.; Torres, G.; Villamar, F.. |
| Se identifican 12 especies de moluscos bivalvos perforadores de la madera Rhyzophora harrisonii (Mangle) en la costa ecuatoriana, de las cuales 11 especies son primeros registros para el Ecuador, ampliándose de esta manera su distribución anterior. Se describen las principales características taxonómicas de cada género y especie encontrada, agregándose dibujos de las paletas que se usaron en la identificación. Los resultados se presentan en gráficos, figuras, histogramas, tablas y mapas de distribución areal de las especies. en las conclusiones se discuten detalles que se han encontrado en los puertos de Esmeraldas, Manta, Salinas, Posorja y Base Naval Sur (Golfo de Guayaquil interior), completándose esta información con recomendaciones para cada puerto. |
| Tipo: Journal Contribution |
Palavras-chave: Marine molluscs; Fouling organisms; New records; Wood; Wood; Http://aims.fao.org/aos/agrovoc/c_8421. |
| Ano: 1987 |
URL: http://hdl.handle.net/1834/2132 |
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| Cruz, M.. |
| En la Isla Baltra, entre abril a agosto/89 se pusieron once tipos de diferentes maderas expuestas al medio ambiente marino, habiéndose encontrado 7 organismos que degradaron la madera, de los cuales 6 son moluscos bivalvos: Bankia carinata, B. gouldi, Lyrodus medilobata, l. pedicellatus, Teredo bartschi, T. furcifera y un isópodo del género limnoria. De los Bivalvos perforadores, T. furcífera ha sido la especie más abundante y frecuente, seguida de L. pedicellatus. Las especies ovadas que se encontraron fueron: T. furcífera, L. pedicellatus, L. medilobata y T. bartschi, de las cuales T. furcífera se presentó como la más abundante y frecuente. la madera que presentó el mayor número de hembras con huevos fue el laurel. De los 11 tipos de maderas expuestos al... |
| Tipo: Journal Contribution |
Palavras-chave: Marine molluscs; Fouling organisms; Islands; Wood; Islands; Wood; Http://aims.fao.org/aos/agrovoc/c_3962; Http://aims.fao.org/aos/agrovoc/c_8421. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/2193 |
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| da Silva Leonardo, Fernanda Viana; Rocha, Henrique Figueiredo; Hurtado de Mendoza, Zaira Morais dos Santos. |
| Os compostos quinônicos, em sua grande parte, são gerados na fração extrativos das madeiras, em um sistema biológico complexo e variável. Por não fazerem parte da parede celular, eles recebem o nome de compostos secundários. Na literatura tem indicações de uso em diversos segmentos, que vão desde a indústria alimentícia até a indústria farmacêutica. Dentro da área de utilização industrial da madeira, eles são pouco desejáveis, visto que são tratados apenas como substâncias acidentais nas cadeias produtoras de celulose, papel, carvão vegetal e serraria. Apesar de sua pouca quantidade em relação aos outros compostos químicos chamados de fundamentais, essas substâncias vem recebendo atenção especial dos pesquisadores, revelando uma gama diversificada de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais Produtos florestais; Madeira; Tecnologia Forest products; Wood; Technology. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/816 |
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| Zanuncio,Antônio José Vinha; Carvalho,Amélia Guimarães; Carneiro,Angélica de Cassia Oliveira; Valenzuela,Paulina; Gacitúa,William; Leite,Fernando Palha; Colodette,Jorge Luiz. |
| Abstract: The objective of this work was to test a new methodology to assess the resistance of trees to wind damage and determine the characteristics that increase clone resistance to winds. Tree resistance to breakage, basic density, ultrastructure, anatomy, mechanical properties, and wood growth stress have been evaluated in seven Eucalyptus grandis × Eucalyptus urophylla clones, collected from a region with a high incidence of wind damage. The Pearson correlation coefficient between the tree resistance to breakage and the ratio between the area damaged by the winds and the total planted area was -0.839, showing the efficiency of the methodology adopted and that high breaking strength results in a smaller area affected by wind damage. Trees with a high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus grandis × Eucalyptus urophylla; Basic density; Cell wall fraction; Cell wall ultrastructure; Fiber; Wood. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100969 |
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| Rosim,Camila Capodifoglio; Hsing,Tseng Yao; Paula,Rinaldo Cesar de. |
| ABSTRACT The aim of this work was to evaluate nutrient use efficiency in interspecific hybrids of eucalypt, as an aid in the development of forest breeding programs for areas with limited nutrients. To do this, five clones were evaluated at 2.25 years of age from hybrids resulting from crosses of Eucalyptus grandis x E. urophylla (C1, C2, C3, C4 and C5). The experimental design was of randomised blocks, with single-tree plots and 35 replications. For the study, four trees of average performance were cut down (replications) from each treatment (clone); the biomass, and content and efficiency of use of N, P, K, Ca and Mg were determined in the wood, bark, leaves and branches. The data were submitted to analysis of variance and the F-test, and the means... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutritional efficiency; Sustainability; Biomass allocation; Energy forests; Wood. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300540 |
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| FIGUEIREDO,Regina; TADEI,Wanderli P; THATCHER,Bedsy DUTARY. |
| The residual power of deltametrine FW (25 mg 1 .a/m2) was evaluated and compared to that of DDT (2 g i.a./m2) by means of biological tests. The different kinds of material used in constructing houses in Amazonia, such as: masonry, wood, and wattle and daub, were used. Data from logistic regression showed that the drop in mortality, the inclination of the curve in relation to time, was similar for the two insecticides in the first samples. The negative coeficient for the variable, months after application, confirmed a reduction in the activity of both insecticides. Wooden and wattle walls showed positive and negative coeficiencies respectively from the beginning. The wooden walls retained a residual effect but the wattle walls were shown to be the least... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malaria Control; Deltametrine; Masonry; Wood; Wattle and Daub. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671999000300411 |
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| Osterkamp,Isa Carla; Lara,Daniela Müller de; Gonçalves,Thaís Alves Pereira; Kauffmann,Marjorie; Périco,Eduardo; Stülp,Simone; Machado,Neli Teresinha Galarce; Uhl,Dieter; Jasper,André. |
| ABSTRACT Charcoal is widely accepted as evidence of the occurrence of palaeo-wildfire. Although fossil charcoal remains have been used in many studies, investigation into the anatomical changes occurring during charring are few. The present study analyses changes in selected anatomical characters during artificial charring of modern wood of three species of the genus Araucaria (i.e. Araucaria angustifolia, Araucaria bidwillii and Araucaria columnaris). Wood samples of the studied species was charred under controlled conditions at varying temperatures. Measurements of anatomical features of uncharred wood and artificial charcoal were statistically analysed. The anatomical changes were statistically correlated with charring temperatures and most of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomy; Araucariaceae; Araucaria angustifolia; Araucaria bidwillii; Araucaria columnaris; Charcoal; Wood. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200198 |
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| Faria,Douglas Lamounier; Cruz,Thiago Moreira; Mesquita Júnior,Laércio; Duarte,Paulo Junio; Mendes,Lourival Marin; Guimarães Júnior,José Benedito. |
| ABSTRACT The glued laminated timber (glulam) is a composite material obtained from the bonding of wood laminae arranged with parallel fibers put together. The purpose of this paper was to evaluate the influence of the number of laminae on the mechanical behavior of glulam of Toona ciliata produced with vegetable-based polyurethane adhesive. The glulam beams were produced with lamellae in the dimensions of 6.0 x 1.5 x 120.0 cm, with 3 beams being made per treatment, which were structurally composed by 5, 7 and 9 laminae. The polyurethane adhesive based on castor oil was used, applying a grammage of 350 g m-². For the technological characterization of the wood the moisture in the dry base, bulk density, chemical characterization, compressive strength... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Composite; Wood; Bond resistance; Flexural strength. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100236 |
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| Registros recuperados: 36 | |
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