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| Registros recuperados: 69 | |
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| LIXA,CAROLINA; MUJO,AMANDA; ANOBOM,CRISTIANE D.; PINHEIRO,ANDERSON S.. |
| Bacteria are able to synchronize the population behavior in order to regulate gene expression through a cell-to-cell communication mechanism called quorum sensing. This phenomenon involves the production, detection and the response to extracellular signaling molecules named autoinducers, which directly or indirectly regulate gene expression in a cell density-dependent manner. Quorum sensing may control a wide range of biological processes in bacteria, such as bioluminescence, virulence factor production, biofilm formation and antibiotic resistance. The autoinducers are recognized by specific receptors that can either be membrane-bound histidine kinase receptors, which work by activating cognate cytoplasmic response regulators, or cytoplasmic receptors... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Autoinducer; Bacteria; Quorum sensing; Receptor; Structure. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502189 |
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| Abreu,Heber S.; Latorraca,João V.F.; Pereira,Regina P.W.; Monteiro,Maria Beatriz O.; Abreu,Fábio A.; Amparado,Kelysson F.. |
| In spite of the great importance of cellulose the lignin is considered the second most abundant substance of the wood. However, little attention has been given it, mainly to wood properties. The lignin as well as other structural compounds (cellulose and hemicelluloses), has obviously an important role on the wood properties, probably due its composition and existent bonds. In general lignins have β-O-4 (Alkyl Aril Ether) as majoritary bond. This bond in a continued structure form big molecules with spiral conformation as virtual model. Based on this idea, lignins that have high/low β-O-4 content may have differentiated spiraled structures,suggesting different behaviors on the wood properties,which shows that the lignins (Guaicyl:Syringyl (GS)) of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lignin; Molecular conformation; Wood properties; Structure. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000100014 |
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| DISLICH,RICARDO; CERSÓSIMO,LUCIANA; MANTOVANI,WALDIR. |
| Neste trabalho é descrita a variação encontrada na estrutura de fragmentos florestais no Planalto Paulistano, sob diversos aspectos e em diferentes escalas de tamanho. Um censo do componente arbóreo dominante (PAP > ou = 50 cm) em duas áreas (0,5 ha e 0,2 ha) no interior de um fragmento florestal, a Reserva da Cidade Universitária "Armando de Salles Oliveira" (CUASO), Butantã, São Paulo, SP (aproximadamente 23°34'S, 46°43'W) incluiu 227 indivíduos de 50 espécies. Foi encontrada dominância absoluta total (Do) de 20,1 m².ha-1, índice de Shannon (H´) de 3,04 nats.ind-1 e equabilidade de Pielou (J´) de 77,79%. Em cada área, foram encontradas regiões de concentração de espécies pioneiras, secundárias e climácicas. As duas áreas apresentaram diferenças na... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ombrophilous dense forest; Fragments; Structure; Diversity. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000300011 |
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| Andrade,Andréia Patricia; Rauber,Luiz Paulo; Mafra,Álvaro Luiz; Baretta,Dilmar; Rosa,Márcio Gonçalves da; Friederichs,Augusto; Mafra,Maria Sueli Heberle; Casara,Ana Cláudia. |
| ABSTRACT: Successive applications of pig slurry and poultry manure can improve the soil structure, according to the land use conditions and amounts applied. This study evaluated the effect of manure fertilization on the physical properties and organic carbon of a Rhodic Kandiudox. Treatments included land use and management and time of pig slurry and poultry litter application, namely: native forest (NF); yerba mate after 20 years of animal waste application (YM20); pasture after 15 years of application (P15); grassland after 20 years of manuring (PP20); grassland after 3 years of manuring (P3); pasture without application (P0), maize after 20 years of application (M20); and maize after 7 years of application (M7). Soil samples were collected in the 0-5,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal waste; Soil quality; Structure. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500809 |
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| Terezo,Rodrigo F.; Córdova,Franciele O. de; Sampaio,Carlos A. de P.. |
| ABSTRACT In the production of glue-laminated timber (GLT), boards derived from planted forest wood with easy workability are glued on top of one another. The main objective of the present work was to evaluate the performance of paricá timber GLT beams (5 × 10 cm) on GLT. Three procedures were performed: (1) GLT beams (5 × 10 cm) were produced using natural lamellae without chemical preservatives; (2) the individual lamellae (2.5 × 5 cm) were chemically treated, and then glued together; and (3) the beams formed from the glued natural lamellae (5 × 10 cm) were treated chemically. The positions of lamellae on the beams were determined by their modulus of elasticity values (MOE), which were estimated by a non-destructive bending test with a three-point load.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Timber; Beams; Structure. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200158 |
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| Genot, Claude; Eymard, Sylvie; Viau, Michèle. |
| Increase the consumption of long-chain omega 3 polyunsaturated fatty acids (LC ω3 PUFA) is highly recommended for their health benefits. However, these fatty acids are very prone to oxidation, which can impair sensory, nutritional and functional properties of foods. In this paper the various ways that increase LC ω3 PUFA stability during processing and storage of food products are reviewed. To efficiently protect LC ω3 PUFA during processing and storage of foods, a combined strategy, taking into account both the matrix and the process should be undertaken. First the quality of the raw materials should be rigorously controlled by, for example, increasing contents of in situ antioxidants and decreasing length of storage. Then, during processing and storage... |
| Tipo: Text |
Palavras-chave: Oxidation; Lipids; Omega 3 polyunsaturated fatty acids; Antioxidants process; Formulation; Structure. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00480/59157/61786.pdf |
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| Quagio-Grassiotto,Irani; Spadella,Maria Angélica; Carvalho,Márcio de; Oliveira,Claudio. |
| The data obtained in the present study on spermiogenesis and spermatozoal ultrastructure of Pseudopimelodidae and Heptapteridae show that they share some characteristics, but greatly differ from each other. The main differences are the occurrence of type I spermiogenesis in Pseudopimelodidae and type III in Heptapteridae, the presence of nuclear fossa in Pseudopimelodidae and its absence in Heptapteridae, the presence of long midpiece in Pseudopimelodidae and short midpiece in Heptapteridae, the presence of cytoplasmic canal in Pseudopimelodidae and its absence in Heptapteridae, the presence of many large vesicles in the midpiece of Pseudopimelodidae and the presence of very long vesicles placed in the peripheral distal region in Heptapteridae, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catfish; Spermatid; Sperm; Structure; Phylogeny. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000300008 |
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| Adekola, Kehinde Adedeji. |
| Termite hills are described as the structure built by termite using soil in the surrounding or within the earth. The mound has extremely hard walls constructed from bits of soil cemented with saliva and baked by the sun. This research is to determine the compressive strength of termite hill soil stabilized with rice husk. The study investigated the compressive strength of 150 mm x 150 mm x 150 mm cubes made from termite hill soil and rice husk in the different mix ratio of 50:50, 60:40, 70:30, 80:20, 100:0 and was cured for 28 d with crushing the cubes at 7 d interval. The weight, bulk density and dry density of the cubes at different THS/RH mix ratio ages were determined. Test results showed that the compressive strength of the cubes increases with age... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Termite hill soil; Clay; Rice husk; Compressive strength; Cubes; Structure; Farm; Nigeria. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3398 |
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| Nikolic, Natacha; Bourjea, Jerome. |
| Because one of the most common problems in fisheries is the definition of management units, we propose in this paper a bibliometric review focusing on the differentiation of Albacore populations, Thunnus alalunga, among and within oceanic regions (Atlantic, Pacific and Indian Oceans, and Mediterranean Sea). This paper is the first step of a current work on a global review of Albacore tuna using an international aquatic database (ASFA). For the present purpose, 367 publications, mainly composed of articles (64%), but also conference papers, proceedings and reports (24%), and books (12%), were analyzed. We will see that the concept of the stock and its delimitation is controversial because of the divergence of results. Such a conclusion makes us believe in... |
| Tipo: Text |
Palavras-chave: Albacore; Stock; Structure; Distribution; Thunnus alalunga. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00149/25990/24085.pdf |
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| Işik,Mehmet; Gül,Mevlüt. |
| ABSTRACT The purpose of this study was to analyse the socio-economic structure of water buffalo farming in the province of Muş, in Turkey. The stratified sampling method was used to calculate sample size of buffalo farms in the Central, Korkut, and Hasköy districts of Muş province, where buffalo farming is widespread. Data were collected from the 94 farms by surveys in the 2013 production period. A single budget analysis method was used to calculate production cost and profit for water buffaloes. Plant production constituted 37.85% of the gross production value, while animal production accounted for 62.15%. The biggest share in the gross production value derived from water buffalo farming (45.71%). Fixed and variable costs were 51.44% and 48.56% of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Production cost; Profit; Structure. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000700400 |
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| Montiel Oscura, Diego. |
| Fagus grandifolia Ehrh. subsp. mexicana (Martínez) A. E. Murray, especie en estatus en la NOM059-SEMARNAT-2010, crece en poblaciones aisladas en la Sierra Madre Oriental. En el presente estudio se describió el tamaño, densidad, estructura y composición arbórea de tres bosques de F. grandifolia subsp. mexicana de reciente ubicación en los estados de Hidalgo y Nuevo León. También, se estimó la diversidad genética de siete poblaciones a través de electroforesis en geles de almidón. El número total de árboles en Tutotepec I y Tutotepec II en el Estado de Hidalgo, y Agua Fría en el Estado de Nuevo León fue 3,895, 6,758 y 4056, respectivamente. Árboles maduros con diámetro normal mayor a 20 cm dominaron en los tres bosques. El área basal varió entre 11.8 y 63.9... |
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Palavras-chave: Fagus grandifolia; Estructura; Composición arbórea; Structure; Tree composition; Maestría; Forestal. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/481 |
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| Montiel Oscura, Diego. |
| Fagus grandifolia Ehrh. subsp. mexicana (Martínez) A. E. Murray, especie en estatus en la NOM059-SEMARNAT-2010, crece en poblaciones aisladas en la Sierra Madre Oriental. En el presente estudio se describió el tamaño, densidad, estructura y composición arbórea de tres bosques de F. grandifolia subsp. mexicana de reciente ubicación en los estados de Hidalgo y Nuevo León. También, se estimó la diversidad genética de siete poblaciones a través de electroforesis en geles de almidón. El número total de árboles en Tutotepec I y Tutotepec II en el Estado de Hidalgo, y Agua Fría en el Estado de Nuevo León fue 3,895, 6,758 y 4056, respectivamente. Árboles maduros con diámetro normal mayor a 20 cm dominaron en los tres bosques. El área basal varió entre 11.8 y 63.9... |
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Palavras-chave: Fagus grandifolia; Estructura; Composición arbórea; Structure; Tree composition; Maestría; Forestal. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/481 |
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| Araujo Andrade, Luis Alberto; Cruz Pacheco, Eraclio del Jesus. |
| The problem to investigate is the permanent disequilibrium of Mexican commercial balance of cattle heads and meat regarding United States during the period 1993-2007. The objective is shows that the inequality productive structure on cattle heads and meat that exists between Mexico and American Union, through commercial exchange of those products impact the commercial balance. The methodology used was the consult of international trade and productive aspects of cattle to both countries and the use of structuralism economic theory for the information analysis. The results obtained shows that the inequality structure between both nations (United States as centre and Mexico as periphery) on items such as herd size; integration to meat industry; meat... |
| Tipo: Journal Article |
Palavras-chave: Structure; External Disequilibrium; Centre; Periphery; Cattle; Heard; Meat.; Agribusiness. |
| Ano: 2010 |
URL: http://purl.umn.edu/93912 |
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| Registros recuperados: 69 | |
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