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Mostrando 25-36 de 119 artigos, teses e dissertações.
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25. Herbage utilisation efficiency of continuously stocked marandu palisade grass subjected to nitrogen fertilisation
Nitrogen fertiliser accelerates plant growth and increases herbage utilisation efficiency in continuously stocked temperate grass swards, indicating greater herbage production and harvest efficiency. There is no similar evidence, however, for tropical pastures. In this study we evaluated the morphogenetic responses, the patterns of defoliation and the effici
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-02
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26. An evaluation of the protective effect of an infusion of chilled glucose solution on thermal injury of the bile ducts caused by radiofrequency ablation of the liver
PURPOSE:To evaluate the protective effects of chilling the bile ducts with cold (5°C) 5% glucose solution (GS) during radiofrequency (RF) administration.METHODS:Twenty male pigs (3 mos. old; 25-30 kg) were subjected to RF delivery with chilling (experimental group, N=10) or without chilling (control group, N=10). Half of the animals in each group were eutha
Acta Cir. Bras.. Publicado em: 2015-01
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27. Leaf Morphological Plasticity of Tree Species from Two Developmental Stages in Araucaria Forest
This study compared the morphological and anatomical variations of the leaves of four shade-tolerant tree species Allophylus edulis (St.-Hil.) Radlk (Sapindaceae), Casearia sylvestris Sw. (Salicaceae), Cupania vernalis Cambess. (Sapindaceae) and Luehea divaricata Mart. (Malvaceae) from a fragment of Araucaria forest in two developmental stages. Morphological
Braz. arch. biol. technol.. Publicado em: 2014-08
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28. Plinia edulis - leaf architecture and scanning electron micrographs
Many species of Myrtaceae, including Plinia edulis (Vell.) Sobral (cambucá), have pharmacological properties and are used as hypoglycemiants and therapeutic agents against stomach problems and throat infections. Samples were collected from Tijuca Forest in Rio de Janeiro, and the morpho-anatomical data were compared with other specimens obtained from Trinda
Rev. bras. farmacogn.. Publicado em: 28/05/2013
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29. Lippia alba morphotypes cidreira and melissa exhibit significant differences in leaf characteristics and essential oil profile
Lippia alba (Mill.) N.E. Br. ex Britton & P. Wilson, Verbenaceae, is widely used in traditional Brazilian medicine for the treatment of abdominal distress. The species exhibits considerable chemical and morphological diversity, and various chemotypes have been characterized. A comparative study of L. alba, has been carried out of the morphoanatomical charact
Rev. bras. farmacogn.. Publicado em: 01/02/2013
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30. Piata palisade grass deferred with two distinct initial heights: luminous environment and tillering dynamics
The study was carried out between March 1st and July 1st, 2011, in order to evaluate the tillering pattern of the deferred Piata palisade grass (Brachiaria brizantha cv. Piata). Three sward heights were evaluated in the beginning of the period of deferment: lower (20 cm), medium (30 cm) and higher (40 cm). The experimental design was of completely randomized
R. Bras. Zootec.. Publicado em: 2013-01
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31. Morphology and anatomy of Justicia acuminatissima leaves
Justicia acuminatissima (Miq.) Bremek., Acanthaceae, is a subshrub found in northern Brazil, where it is widely used by the population of this region as an anti-inflammatory medicine. Despite this popular use, there is no pharmacognostical data to support the correct identification of this species. We therefore performed a morpho-anatomical, histochemical an
Rev. bras. farmacogn.. Publicado em: 16/11/2012
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32. Morphological and physiological adjustments of Brazilwood (Caesalpinia echinata Lam.) to direct solar radiation
This study aimed to characterize the alarm and resistance phases of stress of Caesalpinia echinata under intense irradiance in order to better define its position on forest succession. The alarm phase was identified by rapid reduction in the maximum quantum yield of PSII primary photochemical reactions (ΦP0 = FV/FM) and Performance Index (PIABS) followed by
Braz. J. Plant Physiol.. Publicado em: 2012-09
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33. Characterization of tillers in deferred Piata palisade grass with different initial heights and nitrogen levels
This experiment was conducted to estimate the effects of nitrogen fertilization associated with the initial height of the Piata palisade grass on the number and structural characteristics of individual tillers after the deferment period. An area with Brachiaria brizantha cv. Piata measuring approximately 288 m² was used. Combinations of levels of nitrogen f
Revista Brasileira de Zootecnia. Publicado em: 2012-07
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34. Climatic risk zoning for corn and palisade grass (Brachiaria brizantha cv: Marandu) cultivated in integrated crop-livestock systems in São Paulo state, Brazil
Climatic risk zoning allows the identification of areas of low risk of reduced crop productivity due to climatic events. In Brazil, losses to agriculture due to climate are mainly caused by drought. The objective of this research was to determine areas of low climatic risk for corn and palisade grass cultivated in integrated crop-livestock systems in Sao Pau
Revista Brasileira de Zootecnia. Publicado em: 2012-01
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35. Structural characteristics of tiller age categories of continuously stocked marandu palisade grass swards fertilized with nitrogen
The objective of this experiment was to evaluate the structural characteristics of young, mature and old tillers on continuously stocked marandu palisade grass maintained at 30 cm and fertilized with nitrogen. Treatments corresponded to three nitrogen application rates (150, 300 and 450 kg/ha of N) plus control (no fertilization) and were assigned to experim
Revista Brasileira de Zootecnia. Publicado em: 2012-01
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36. Leaf and calycine colleters in Odontadenia lutea (Apocynaceae - Apocynoideae - Odontadenieae): their structure and histochemistry
The structure and histochemistry of colleters found on the vegetative and floral apices of Odontadenia lutea are described. Colleters occur on vegetative apices starting at the fourth node, with 68 to 80 colleters being found at each node. Each leaf primordium has only one colleter of axillary origin, 3-5 intra-petiolar, and 12-16 inter-petiolar (intra-stipu
Braz. J. Bot.. Publicado em: 2012