929 resultados para Engyodontium album


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UANL

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UANL

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Le but de ce document est d’offrir une analyse détaillée de trois fugues et d’une pièce pour orchestre de chambre, pièces composées entre 2013 et 2014 et qui constituent le sommet d’une démarche compositionnelle visant la gradation de difficulté d’écriture et d’exécution. Leur analyse comprend : une explication détaillée de leur position dans l’album, une explication du ou des concepts qui les sous-tendent en plus d’une analyse des différentes sections de toutes les pièces.

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S. album L. is the source of highly priced and fragrant heartwood which on steam distillation yields on an average 57 per cent oil of high perfumery value. Global demand for sandalwood is about 5000-6000 tons/year and that of oil is 100 tons/year. Heartwood of sandal is estimated to fetch up to Rs. 3.7 million/ton and wood oil Rs.70,000-100,000/ kg in the international market. Sandal heartwood prices have increased from Rs. 365/ton in 1900 to Rs. 6.5 lakhs/ton in 1999-2000 and to Rs. 37 lakhs/ton in 2007. Substantial decline in sandalwood production has occurred from 3176 tons/year during 1960-‘ 65 to 1500 tons/year in 1997-98, and to 500 tons/year in 2007.Depletion of sandal resources is attributed to several factors, both natural and anthropogenic. Low seed setting, poor seed germination, seedling mortality, lack of haustorial connection with host plant roots, recurrent annual fires in natural sandal forests, lopping of trees for fodder, excessive grazing, hacking, encroachments, seedling diseases and spread of sandal spike disease are the major problems facing sandal. While these factors hinder sandal regeneration in forest areas, the situation is accelerated by human activities of chronic overexploitation and illicit felling.Deterioration of natural sandal populations due to illicit felling, encroachments and diseases has an adverse effect on genetic diversity of the species. The loss of genetic diversity has aggravated during recent years due to extensive logging, changing landuse patterns and poor natural regeneration. The consequent genetic erosion is of serious concern affecting tree improvement programme in sandal. Conservation as well as mass propagation are the two strategies to be given due importance. To initiate any conservation programme, precise knowledge of the factors influencing regeneration and survival of the species is essential. Hence, the present study was undertaken with the objective of investigating the autotrophic and parasitic phase of sandal seedlings growth, the effects of shade on morphology, chlorophyll concentration and chlorophyll fluorescence of sandal seedlings, genetic diversity in sandal seed stands using ISSR markers, and the diversity of fungal isolates causing sandal seedling wilt using RAPD markers. All these factors directly influence regeneration and survival of sandal seedlings in natural forests and plantations.

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Loss of natural sandal populations due to illicit felling, forest encroachment and spike disease have an adverse effect on genetic diversity of the species. To initiate any genetic improvement programme in sandal, a precise understanding of the population genetic diversity structure is essential. The concern over the loss of genetic variability in sandal is particularly critical, as there is hardly any information regarding the diversity status of the natural populations. Identifying fast growing, disease resistant, oil rich sandal trees through breeding and their mass multiplication for afforestation are the best method for ensuring sustainable supply of superior sandalwood. The healthy sandal trees existing in heavily spike diseased area can be used as a promising starting point for any such breeding programme (Venkatesh, 1978). So far, no genetic information is available regarding the resistant nature of spike disease evaded trees left in heavily infected patches. The high rate of depletion of the superior trees in South Indian sandal reserves due to illegal felling and spike disease has necessitated an urgent need for conservation of the surviving trees.Widespread occurrence of spike disease in Marayoor forest reserve was reported in 1981 (Ghosh and Balasundaran, 1995). Because of the high density of trees and varying intensity of spike disease, Marayoor sandal population was found to be ideal for experimental studies in sandal (Ghosh et al., 1985). Fifteen trees of reserve 51 of Marayoor range had been selected as candidate plus trees for growth and spike disease evasion . These trees have been selected for mass multiplication through tissue culture technique.

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Este libro, presenta la perspectiva nacionalista chilena. Su autor el historiador Benjamín Vicuña Mackenna (1831-1886) narra la guerra desde la perspectiva de las "proezas de los más ilustres marinos y soldados chilenos muertos por la patria". Las ilustraciones del libro estuvieron a cargo de Luis Fernando Rojas (1857-1942), quien con su estética patriótica y neoclásica logró transmitir el ambiente de exaltación militar y nacionalista vivido en Chile tras la victoria.

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Este álbum fue publicado para las celebraciones del primer centenario de la independencia de Colombia en 1910, por orden de la llamada Junta Nacional del Primer Centenario de la Independencia. Contiene 60 litografías basadas en acuarelas y dibujos del artista Ramón Torres, impresas en Leipzig, Alemania.

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Complementa la visita guiada al edificio del Ayuntamiento de Palma y forma parte de la actividad del Departamento de Dinámica Educativa del Ayuntamiento de Palma de Mallorca