Wood Decomposition
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Artropodes associados as carcaças de pequenos roedores expostas em area de formação vegetal secundaria no municipio de Campinas, SP / Arthropods associated with small rodent carcasses exposed in a secondary wood area in the municipality of Campinas, SP
Although studies of the post-mortem fate of human corpses are of forensic interest, and in natural environments large animals become available to insect colonization soon after death, the fate of the vast number of small carcasses in some habitats, as well as the parameters that lead this process, are not objective of important investigations. Due to this si
Publicado em: 2006
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14. Dinâmica da Serapilheira em umTrecho de Floresta Atlântica Secundária em Área Urbana do Rio de Janeiro / Litterfall dynamic in a secondary atlantic rain forest section in urban area of Rio de Janeiro
Many studies on litter production and decompositon have been conducted throughout the Atlantic Rain Forest ecosystem with different use history and currently protected by conservation units. The present study was carried out in a section of secondary Atlantic Rain Forest known as the Camorim Forest, in the city of Rio de Janeiro. During the 1940s and 50s, th
Publicado em: 2006
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15. SOIL RECUPERATION IN FOREST SETTLEMENTS IN MINING AREAS IN THE TREMEMBE MUNICIPALITY - SP / RECUPERAÃÃO DO SOLO EM POVOAMENTOS FLORESTAIS EM ÃREA DE EXPLORAÃÃO DE AREIA NO MUNICÃPIO DE TREMEMBÃ-SP
The recuperation of degraded areas due to mining activity namely sand mining is carried out by the forest recomposition with native species. In the present work the availability of nutrients along with amount of living matter cover accumulated in a native ciliary wood and in five fragments of forest recomposition of areas previously used for sand mining in t
Publicado em: 2006
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16. Impact of Nitrogen and Phosphorus on [14C]Lignocellulose Decomposition by Stream Wood Microflora †
Nutritional and physical factors affecting the decomposition of [14C]lignocellulose prepared from Douglas fir (Pseudotsuga menziesii) were examined by incubating the labeled substrate with homogenized surface wood scrapings obtained from a Douglas fir log in a Pacific Northwest stream. Incubations were conducted in distilled water, in stream water collected
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17. Bacterial Activity Associated with the Decomposition of Woody Substrates in a Stream Sediment †
Ground bark and heartwood from Alnus rubra and Pseudotsuga menziesii were added to a muddy sediment from a small Oregon stream and incubated in situ. Carbon dioxide and methane production rates were increased by all amendments, the biggest increase being shown with A. rubra wood. Except for sediment amended with A. rubra wood, nitrogen fixation rates from al
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18. Requirement for a Growth Substrate During Lignin Decomposition by Two Wood-Rotting Fungi
Decomposition of 14C-labeled lignin to 14CO2 by the lignin-decomposing fungi Phanerochaete chrysosporium and Coriolus versicolor required a growth substrate such as cellulose or glucose. Growth with lignin as sole carbon addition to an otherwise complete medium was negligible.
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19. Poplar Lignin Decomposition by Gram-Negative Aerobic Bacteria
Eleven gram-negative aerobic bacteria (Pseudomonadaceae and Neisseriaceae) out of 122 soil isolates were selected for their ability to assimilate poplar dioxane lignin without a cosubstrate. Dioxane lignin and milled wood lignin degradation rates ranged between 20 and 40% of initial content after 7 days in mineral medium, as determined by a loss of absorbanc
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20. Microbial Decomposition of Wood in Streams: Distribution of Microflora and Factors Affecting [14C]Lignocellulose Mineralization †
The distribution and lignocellulolytic activity of the microbial community was determined on a large log of Douglas fir (Pseudotsuga menziesii) in a Pacific Northwest stream. Scanning electron microscopy, plate counts, and degradation of [14C]lignocelluloses prepared from Douglas fir and incubated with samples of wood taken from the surface and within the lo
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21. Nitrogen Dynamics in Stream Wood Samples Incubated with [14C]Lignocellulose and Potassium [15N]Nitrate †
Surface wood samples obtained from a Douglas fir log (Pseudotsuga menziesii) in a Pacific Northwest stream were incubated in vitro with [14C]lignocellulose in a defined mineral salts medium supplemented with 10 mg of N liter−1 of 15N-labeled NO3− (50 atom% 15N). Evolution of 14CO2, distribution and isotopic dilution of 15N, filtrate N concentrations, and
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22. Composting Process Control Based on Interaction Between Microbial Heat Output and Temperature †
Rational composting process control involves the interrelated factors of heat output, temperature, ventilation, and water removal. The heat is released microbially at the expense of organic material; temperature is an effect and, because it is a determinant of microbial activity, it is also a cause of heat output; ventilation supplies oxygen and removes heat
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23. Stimulation of Mn peroxidase activity: a possible role for oxalate in lignin biodegradation.
Oxalate is produced by numerous wood-degrading fungi. Our studies here show that the white-rot fungus Phanerochaete chrysosporium produces extracellular oxalate under conditions that induce synthesis of the ligninolytic system. Little or no oxalate was detected in cultures grown under high nutrient nitrogen or carbon. This extracellular oxalate was identifie
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24. Characterization of Palo Podrido, a Natural Process of Delignification in Wood †
Chemical and morphological changes of incipient to advanced stages of palo podrido, an extensively delignified wood, and other types of white rot decay found in the temperate forests of southern Chile were investigated. Palo podrido is a general term for white rot decay that is either selective or nonselective for the removal of lignin, whereas palo blanco d