1000 resultados para Síntesi orgànica
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Autor tomado de p. 3.
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El t. III fue publicado en la Imp. del Diccionario Geográfico, a cargo de D. José de Rojas, y T.IV, Imprenta La Ilustración.
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Mode of access: Internet.
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Tesis de la Universidad Central (Madrid), Facultad de Farmacia, leída el 20-09-1866.
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Mode of access: Internet.
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Tesis Universidad Central, 1859.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Tesis Universidad Central, 1859.
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Mode of access: Internet.
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Contiene: t. I - t. II - t. III - t. IV - t. V - t. VIII - t. IX - t. X - t. XI - t. XII - t. XIII - t. XV.
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Mode of access: Internet.
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Knowledge is understanding. According to the philosopher Gaston Bachelard our immediate contact with the reality is only worth as confusing and provisional data. This phenomenological contact requires inventory and classification. For this reason our first reading on any phenomenon is limited to a basic levels of reality. Elements such as dynamics, functioning or detailed characteristics of what is observed can only be accessed at higher levels of reality, explains the physicist Werner Heisenberg. The ideas woven by these two great intellectuals oxygenates the notion that a well-made thinking does not require only observation and description of the nature, but assigns value and meaning to the knowledge. Based on these ideas and on the cognitive horizon brought by the complexity sciences, this research aims to nurture a reflection on our understanding of the world built from a rational perspective of experience, as an organic sequence of research. This arguments, over the study, describes how the experience is able to oxygenate a well-made thinking, as the concept created by Edgar Morin and expanded by Conceição Almeida. I argue that the experience as a path of investigative research allows one to ventures in the shadows of the unknown to access upper layers of reality. The experience is, therefore, an organic strategy for a well-made thinking - A nutritious mud that oxygenates, regulates, repairs and configures the quality of understanding. As a thread to discuss this ideas I've used my professional journey over a year and a half as a Natural Sciences' teacher on the Federal University of Rio Grande do Norte, where I could see how experiences helped on breaking a simplified understanding of the world. I chose to work with the research problems developed by 398 students over these three semesters. The problems were essential to the questioning of the phenomena that once seemed obvious or uninteresting, bringing out operational reasons and dynamics of the observed structures. Experience, in this sense, is the founder of dynamic thinking, as the need to deconstruct the phenomena's first impressions, assigning value and meaning to gestated knowledge.
Lâminas de água salina e doses de adubação orgânica na produção de palma Miúda adensada no semiárido
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Cactus pear is an important forage for livestock in semi-arid region of Brazil, due to its adaptation to climate conditions in this region, high productivity and nutritional value. The yield of this cactus has positively responded to techniques such as planting density, fertilization and cutting managements, however, in Rio Grande do Norte State, only certain areas have favorable climate conditions to the development of this crop. Drip irrigation, with a small amount of water, has proven to be an alternative to the viability of cactus pear cultivation in these areas. The research aimed to evaluate the effects of different levels of saline water and manure organic fertilization on the morphological characteristics and production of fresh and dry matter of the prickly-pear cactus cv. Miúda (Nopalea cochenillifera Salm Dick) in a dense planting system. The experiment was conducted at the Experimental Station of Terras Secas (EMPARN), Pedro Avelino, latitude 5°31'21" South and longitude 36°23'14" West. The soil was classified as Typical Cambisol Haplicum Carbonate and the water used in irrigation, C4S1T3 (5,25 dS.m-1), with planting spacing of 2.0 x 0.25 m (20,000 plants ha-1). A completely randomized design in a split plot was used, where water levels (0, 7.5, 15.0 and 30.0 mm month-1) with 10 days intervals, were the main plots and organic fertilization (0 , 25 and 50 Mg ha-1 yr-1) the subplots, with four replicates. The measured morphological characteristics were number of cladodes, height and volume of the plant; length, width, perimeter, thickness, area and cladodes area index, fresh and dry matter production, dry matter content, water use efficiency (WUE) and damage promoted by cochineal pest (Diaspis echinocacti) and soft rot (Erwinia carotovora). There was no influence (P>0.05) of organic fertilization on most variables, particularly in relation to the production of fresh and dry matter. The water levels had a significant influence (P<0.05) on most variables, promoting higher height and volume of the plants, larger and thicker cladodes, and increase on fresh and dry matter production (13.55 Mg DM ha-1 yr-1). The absence of irrigation caused a significant expansion in plant damage caused by the cochineal pest and when irrigated with different water levels there was an increase in damage and stand loss, caused by soft rot, been more intense at the higher water level.