Advanced Search
Now showing items 1-10 of 1248
La fronda: cómo la elite secuestró la democracia
(Catalonia, 2017)
Potencial de almacenamiento y secuestro de carbono del huiro negro (Lessonia berteroana y L. spicata) en Áreas de Manejo y Explotación de Recursos Bentónicos (AMERB) del norte de Chile
(Universidad de Chile, 2022)
Las macroalgas pardas del orden Laminariales, llamadas también “kelps” o “huiros”, son responsables de gran parte del secuestro de dióxido de carbono en los ecosistemas costeros marinos, lo cual es clave en la adaptación y mitigación del cambio...
Brown macroalgae of the order Laminariales, also known as kelp, are responsible for much of the carbon dioxide sequestration in coastal marine ecosystems, which is key to climate change adaptation and mitigation. It is also a key factor in the development of the blue economy. To harness the potential of kelps, the Chilean government plans to implement strategies that allow its sustainable development, such as blue carbon initiatives. The first step is to fill in information gaps regarding the carbon stock and sequestration capacity of the Chilean kelp species. In this work, we studied two allopatric species Lessonia berteroana and L. spicata, that inhabit the same ecological niche and are marketed unprocessed. On the one hand, to estimate carbon storage, the wet biomass, dry biomass and the percentage of carbon contained in samples of holdfasts, stipes and fronds tissue of individuals in four different localities were analyzed, together with the density of the populations. On the other hand, to estimate carbon sequestration, net primary productivity was analyzed. Subsequently, a bibliographic review was carried out to create a model that represents the dynamics of the carbon stock and sequestration system in each species, identifying the existing components, interactions, and missing information. Our results indicate that the carbon stored varies among species, being higher in L. spicata than in L. berteroana, varies among seasons and structures, as the stipes and fronds capture more carbon than the holdfast. This suggests that the most commonly used estimates of carbon storage may probably overestimate the actual carbon stock in natural settings. In addition, long-term carbon sequestration will depend on local physical and biological factors, such as temperature, wind, currents, topography and population density among other. Future studies should focus on reducing the knowledge gap in this area, obtaining more detailed data that allow more accurate projections of the carbon stored in tissues and the carbon buried in sediments or the one that reaches the deep ocean, generating predictive models that allow strategic analysis for action against climate change....
Brown macroalgae of the order Laminariales, also known as kelp, are responsible for much of the carbon dioxide sequestration in coastal marine ecosystems, which is key to climate change adaptation and mitigation. It is also a key factor in the development of the blue economy. To harness the potential of kelps, the Chilean government plans to implement strategies that allow its sustainable development, such as blue carbon initiatives. The first step is to fill in information gaps regarding the carbon stock and sequestration capacity of the Chilean kelp species. In this work, we studied two allopatric species Lessonia berteroana and L. spicata, that inhabit the same ecological niche and are marketed unprocessed. On the one hand, to estimate carbon storage, the wet biomass, dry biomass and the percentage of carbon contained in samples of holdfasts, stipes and fronds tissue of individuals in four different localities were analyzed, together with the density of the populations. On the other hand, to estimate carbon sequestration, net primary productivity was analyzed. Subsequently, a bibliographic review was carried out to create a model that represents the dynamics of the carbon stock and sequestration system in each species, identifying the existing components, interactions, and missing information. Our results indicate that the carbon stored varies among species, being higher in L. spicata than in L. berteroana, varies among seasons and structures, as the stipes and fronds capture more carbon than the holdfast. This suggests that the most commonly used estimates of carbon storage may probably overestimate the actual carbon stock in natural settings. In addition, long-term carbon sequestration will depend on local physical and biological factors, such as temperature, wind, currents, topography and population density among other. Future studies should focus on reducing the knowledge gap in this area, obtaining more detailed data that allow more accurate projections of the carbon stored in tissues and the carbon buried in sediments or the one that reaches the deep ocean, generating predictive models that allow strategic analysis for action against climate change....
Influencia de las prácticas agrícolas en la dinámica de los carbonatos en los suelos
(Universidad de Chile, 2021)
, para dilucidar qué procesos
predominan y su posible efecto en el actual escenario de cambio climático. También se
aborda el secuestro de carbono, las morfologías de los carbonatos y los factores y procesos
de formación de suelos ligados a su génesis...
Soil inorganic carbon or SIC (mainly as CaCO3) is an important global storage of C, with an estimated maximum accumulation of 2.3 x 1015 kg C, being the dominant C species in 54% of soils in the world. Arguing a little variation in its content after thousands of years, little importance has been given to it, however, alterations have been registered in the pool SIC in the period of decades because of agricultural work. Arid and semi-arid regions, which reach more than 35% of the earth's surface, and where most of the carbonate is found in the soil, play a key role in the global C cycle, since conversion to agricultural land will generate processes of accumulation or dissolution of the SIC. This compilation analyzed more than 60 scientific investigations related to carbonates in the soil, seeking to know the influence of agricultural practices, specifically irrigation, fertilization, and tillage, on SIC reserves, to elucidate which processes predominate, and the possible effect in the current climate change scenario. Carbon sequestration, carbonate morphologies, and soil forming factors and processes linked to their genesis are also addressed. The results indicate that the work of fertilization and the use of pH correctors have a direct effect on the dissolution of carbonates, releasing massive amounts of CO₂ into the atmosphere in the medium term. However, the information collected concerning irrigation and tillage is not enough to conclude which is the dominant process, nor to calculate the rates of sequestration or release of C. It is necessary to continue with field research, which will clarify the scope of agriculture in SIC reserves on a global scale....
Soil inorganic carbon or SIC (mainly as CaCO3) is an important global storage of C, with an estimated maximum accumulation of 2.3 x 1015 kg C, being the dominant C species in 54% of soils in the world. Arguing a little variation in its content after thousands of years, little importance has been given to it, however, alterations have been registered in the pool SIC in the period of decades because of agricultural work. Arid and semi-arid regions, which reach more than 35% of the earth's surface, and where most of the carbonate is found in the soil, play a key role in the global C cycle, since conversion to agricultural land will generate processes of accumulation or dissolution of the SIC. This compilation analyzed more than 60 scientific investigations related to carbonates in the soil, seeking to know the influence of agricultural practices, specifically irrigation, fertilization, and tillage, on SIC reserves, to elucidate which processes predominate, and the possible effect in the current climate change scenario. Carbon sequestration, carbonate morphologies, and soil forming factors and processes linked to their genesis are also addressed. The results indicate that the work of fertilization and the use of pH correctors have a direct effect on the dissolution of carbonates, releasing massive amounts of CO₂ into the atmosphere in the medium term. However, the information collected concerning irrigation and tillage is not enough to conclude which is the dominant process, nor to calculate the rates of sequestration or release of C. It is necessary to continue with field research, which will clarify the scope of agriculture in SIC reserves on a global scale....
Devolución de la víctima libre de todo daño en el delito de secuestro
(2013)
UNIVERSIDAD DE CHILE
FACULTAD DE DERECHO
PROGRAMA DE MAGISTER
DEVOLUCION DE LA VICTIMA LIBRE DE TODO DAÑO EN EL DELITO DE
SECUESTRO
Actividad Formativa equivalente a tesis (AFET) para optar al...
de la pena a imponer por la ejecución, como autor o partícipe, del delito de secuestro o sustracción de menores. La norma exige la devolución libre de todo daño de la víctima antes o después de cumplirse cualquiera de las condiciones impuestas por...
de la pena a imponer por la ejecución, como autor o partícipe, del delito de secuestro o sustracción de menores. La norma exige la devolución libre de todo daño de la víctima antes o después de cumplirse cualquiera de las condiciones impuestas por...
Ficciones que se vuelven realidad, ficciones para intervenir la realidad
(Universidad Autónoma de Barcelona, Departamento de Psicología Social, 2018-07)
usos más productivos en el Chile contemporáneo: la noción de “secuestro permanente”, propuesta por el Juez Guzmán en los años noventa para desafiar el orden jurídico que estabilizaba la Ley de Amnistía de 1978....
In this paper, we propose that fiction is not only a false way of referring to the social reality or a ruse for the construction of imaginary worlds. On the contrary, we understand fictions as a human capacity highly productive in the construction and organization of the social world, a capacity widely disseminated in this world. We started giving an overview on some discussions in social sciences on the issue of fictionality. After that, we rescue the notions of "real fiction" and "fictional expectations" to address the productive character of fiction, with special emphasis on its temporary reference. We conclude by studying the social practice of "to act as if the fictional was real" to discuss its implications in one of the most productive uses that has had in contemporary Chile: the notion of "permanent kidnapping" proposed by Judge Guzman to challenge legal order established by 1978 Amnesty Law....
In this paper, we propose that fiction is not only a false way of referring to the social reality or a ruse for the construction of imaginary worlds. On the contrary, we understand fictions as a human capacity highly productive in the construction and organization of the social world, a capacity widely disseminated in this world. We started giving an overview on some discussions in social sciences on the issue of fictionality. After that, we rescue the notions of "real fiction" and "fictional expectations" to address the productive character of fiction, with special emphasis on its temporary reference. We conclude by studying the social practice of "to act as if the fictional was real" to discuss its implications in one of the most productive uses that has had in contemporary Chile: the notion of "permanent kidnapping" proposed by Judge Guzman to challenge legal order established by 1978 Amnesty Law....
Diferencia entre oferta y demanda del servicio ecosistémico de regulación climática global en tres comunas del Gran Santiago
(Universidad de Chile, 2020)
Los servicios ecosistémicos que provee el arbolado urbano tienen un rol fundamental en el bienestar de los habitantes de las ciudades, además de contribuir a la mitigación del cambio climático global a través del almacenamiento y secuestro de...
Importancia de la química de la planta en la interacción entre Battus polydamas archidamas (Papilionidae) y Aristolochia chilensis (Aristolochiaceae)
(Universidad de Chile, 2010)
) la respuesta de adultos de ambos sexos hacia señales químicas y visuales de su planta hospedera; iii) el efecto de dos concentraciones (alta y baja) de AAs en dietas artificiales sobre larvas durante todo su desarrollo y iv) los patrones de secuestro...
The butterflies of the Troidini tribe (Papilionidae) are specialists in plants of the Aristolochiaceae family that contain secondary compounds called aristolochic acids. The larvae of Battus polydamas archidamas (Papilionidae) are almost exclusively found in the field on Aristolochra chilensis (Aristolochiaceae). The following were studied: i) oviposition patterns, larval aggregation patterns and foraging patterns on plant tissues, in the field; ii) the response of adults of both sexes to chemical and visual cues from their host plant; iii) the effect of two concentrations (high and low) of AAs in artificial diets on larvae throughout their development and iv) sequestration patterns in different larval tissues of AAs in artificial diets, throughout larval development. It was observed that: i) females oviposit on young leaves, the first larval dispersal occurs at the end of the third instar, the larvae feed on young leaves until the end of the second instar and then expand their diet to other plant tissues; ii) both adults and larvae recognize volatile chemical stimuli from their host plant; iii) AAs in the diet have a phagostimulating effect, which in the early stages translates into high mortality at low concentrations and iv) sequestration by larvae increases throughout development and depending on the concentration of AAs in the diet ; the osmeterians appear to have more selective processes. The relationship between field and laboratory data is discussed...
The butterflies of the Troidini tribe (Papilionidae) are specialists in plants of the Aristolochiaceae family that contain secondary compounds called aristolochic acids. The larvae of Battus polydamas archidamas (Papilionidae) are almost exclusively found in the field on Aristolochra chilensis (Aristolochiaceae). The following were studied: i) oviposition patterns, larval aggregation patterns and foraging patterns on plant tissues, in the field; ii) the response of adults of both sexes to chemical and visual cues from their host plant; iii) the effect of two concentrations (high and low) of AAs in artificial diets on larvae throughout their development and iv) sequestration patterns in different larval tissues of AAs in artificial diets, throughout larval development. It was observed that: i) females oviposit on young leaves, the first larval dispersal occurs at the end of the third instar, the larvae feed on young leaves until the end of the second instar and then expand their diet to other plant tissues; ii) both adults and larvae recognize volatile chemical stimuli from their host plant; iii) AAs in the diet have a phagostimulating effect, which in the early stages translates into high mortality at low concentrations and iv) sequestration by larvae increases throughout development and depending on the concentration of AAs in the diet ; the osmeterians appear to have more selective processes. The relationship between field and laboratory data is discussed...
El derecho y la abogacía en la literatura de Honoré de Balzac
(Universidad de Chile, 2000)
estilo, particularmente aquel que está relacionado con mi profesión, aquellas historias de contenido jurídico, donde encontramos una demanda de interdicción, un juez probo, policías corruptos, el falso secuestro de un senador impulsado por el ánimo de...