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| Registros recuperados: 65 | |
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| Vega Hernández, Dania Melissa. |
| El método indirecto de conteo de grupos fecales es muy empleado en la estimación de poblaciones de venado. Para realizar su estimación es necesario utilizar un índice fecal, lo que se conoce como tasa de defecación. Sin embargo, existe gran variación entre las tasas a emplear lo que hace cometer errores al estimar la densidad de población en una determinada área, independientemente de la semejanza en hábitat, lo que puede acarrear estimaciones y decisiones equivocadas en el manejo y aprovechamiento de la especie. Considerando lo anterior, se planteó la construcción de modelos para estimar las tasas de defecación de venado cola blanca a partir de los contenidos de fibra detergente neutro (FDN) y fibra detergente ácido (FDA) en heces. De mayo de 2012 a junio... |
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Palavras-chave: Venado; Grupos fecales; Consumo; Fibra; Defecación; Deer; Fecal groups; Food intake; Fiber; Defecation; Ganadería; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2361 |
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| Luna Rodríguez, Lorena. |
| Este trabajo describe la evaluación del crecimiento del hongo ligninolítico Pleurotus ostreatus (cepas IE8 y CP50) sobre rastrojo de cebada suplementada con fuente de nitrógeno exógena (urea o sulfato de amonio) y humedades de 70 y 80 %; inicialmente se evaluó la velocidad de crecimiento radial (Vr) en cajas Petri y rastrojo de cebada. Las Vr más altas fueron 0.568 mm h-1 del testigo A (CP50, 80% de humedad, Medio con agua destilada) y 0.573 mm h-1 del tratamiento 6 (cepa IE8, 80% de humedad, Medio base). (Ver cuadro 5, pag. 23). Al adicionar una fuente de nitrógeno exógena las cepas no mejoran su Vr; sin embargo el 80% de humedad favoreció el Vr de ambas cepas. Con las condiciones antes mencionadas se eligió el hongo Pleurotus ostreatus (cepas... |
| Tipo: Tesis |
Palavras-chave: Hongos ligninolíticos; Enzimas exógenas; Fibra; Maestría; Ganadería; White-rot fungi; Exogenous enzymes; Fiber. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1431 |
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| Bain, Cedric; Davies, Peter; Bles, Guilhem; Marco, Yann; Barnet, Julien. |
| Synthetic fiber ropes are widely used in the maritime industry, with applications from sailboat rigging to offshore platform mooring lines, thanks to their numerous qualities compared to steel cables: light weight, good specific mechanical properties and excellent marine resistance. A key feature of these ropes is their sensitivity to loading history, as this affects subsequent performance. In the present work the influence of the maximum bedding-in load level and the loading path were studied at the different rope component scales (filament, yarn and braided rope), in order to develop an optimal bedding-in procedure for braided ropes. The load levels were: 10%, 30% and 50% of the tensile break load of the sample. From the results obtained, the influence... |
| Tipo: Text |
Palavras-chave: HMPE; Rope; Bedding-in; Stretched; Fiber; Braided. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72668/74838.pdf |
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| Jansen, S.; Sano, Y.; Choat, B.; Rabaey, D.; Lens, F.; Dute, R.R.. |
| The micromorphology of pits in tracheary elements was examined in 35 species representing 29 genera of Rosaceae and related families to evaluate the assumption that angiosperm pits are largely invariant. In most Rosaceae, pit membranes between fibers and tracheids frequently appear to have amorphous thickenings with an irregular distribution. Although these structures are toruslike under the light microscope, observations by electron microscopy illustrate that they represent ‘‘pseudotori’’ or plasmodesmata-associated thickenings. These thickenings frequently extend from the periphery of the pit membrane and form a cap-like, hollow structure. Pseudotori are occasionally found in few Elaeagnaceae and Rhamnaceae and appear to be related to species with... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Fiber; Pit; Pit membrane; Pseudotorus; Rosaceae; Rosales; Torus; Tracheid; 42.58. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/423505 |
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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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| Silva,Rafael Lopes da; Araújo,Eric Portilho de; Rocha,Mariucha Karina Honório Ribeiro; Damasceno,Flavia Mota; Freitas,Jakeline Marcela Azambuja de; Sartori,Maria Márcia Pereira; Meirelles,Paulo Roberto de Lima; Barros,Margarida Maria; Pezzato,Luiz Edivaldo. |
| Abstract: The objective of this work was to evaluate the diet components - crude fiber, neutral detergent fiber, acid detergent fiber, hemicellulose, cellulose, and lignin - as internal indicators in the determination of the apparent digestibility coefficients of dry matter, gross energy, and of the nutrients - crude protein, phosphorus, and amino acids - in Nile tilapia (Oreochromis niloticus). Groups of ten juveniles (80.3±1 g) were randomly distributed in six tanks of 250 L and fed two practical diets, either of a plant-origin diet or of a plant- and animal-origin diet. Both diets were supplemented with 0.1% chromium (III) oxide (Cr2O3). Faeces were collected by the modified Guelph system. The apparent digestibility coefficients were determined by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Cellulose; Fiber; Nutrients.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000600393 |
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| Registros recuperados: 65 | |
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