Fronteras en construcción: Diferenciación social y desterritorialización en el Sur ibérico (siglos IX-VI a.C.)

Durante las tres últimas décadas, numerosos/as arqueólogos/as han discutido extensamente sobre el ritual funerario original de las poblaciones del sur ibérico entre los siglos ix y vi a.c., esto es, cremación o inhumación. Este debate está además conectado con la existencia o no de complejidad social antes de la llegada fenicia, con la aparición de una élite “orientalizada” y con la adopción de nuevos objetos y prácticas por las poblaciones locales. En este artículo hago uso del concepto deleuziano de “desterritorialización” y lo asocio con el de “frontera” desarrollado por anzaldúa para interpretar la sociedad del sur ibérico. Para ello, analizo la evidencia funeraria indígena y cuestiono la división estricta entre cremación e inhumación en la región; así como examino la profundidad y significado de los cambios funerarios en las comunidades locales.

Los hornos de cal en Gran Canaria : historia, evolución y tipología

Programa de doctorado: La Restauración y la Rehabilitación arquitetónica. Investigación, tendencias e innovaciones. La fecha de publicación es la fecha de lectura

Actitudes hacia la variedad caló y sus hablantes : Un estudio sociolingüístico de las opiniones de adolescentes andaluces

Caló is a language/variety spoken by the Spanish Calé (i.e. the Roma). The variety belongs to a group oflanguages referred to as “Para-Romani”, characterized by Romani vocabulary, but largely non-Romani morphology, phonology and syntax, in the case of Caló deriving from Spanish. Much research has been carried out regarding the vocabulary and the grammar of this variety.The conclusions drawn in those studies indicate that Caló is on its way to extinction. However, thereis an expressed interest in reintroducing the variety, in a form called “Romanó-Caló”. Language attitudes play a decisive role for the destiny of endangered languages. In order for arevitalization project to be successful, the attitudes towards the variety being reintroduced have to bepositive. The aim of this study is to measure the attitudes that both Calé and non-Calé have towards Calóand Caló speakers, a type of study never carried out in the past. The methods applied are both direct andindirect. In part one, 231 informants listened to different recordings of voices acting as either a “Spanishspeaking person” or a “Caló speaking person”, a technique referred to as ‘matched guise’. Firstly,the informants were asked to write down their first three impressions of the speakers. Secondly, nineshort questions related to the voices were asked, to which the subjects expressed their answers on attitudescales. They were also asked to match the voices with photos of people. Furthermore, theinformants have answered questions regarding what variety is spoken at home, as well as if he or she hasany knowledge of, or contact with, any language/variety, apart from Spanish. 182 informants continuedwith part two of the questionnaire, which consisted of 20 items – positive and negative statementstowards Caló and Caló speakers. The informants have rated their agreement or disagreement to thesestatements on a Likert scale. Another exercise measured the willingness of the informants to use Calówords for naming various objects. In addition, the subjects were tested on their knowledge of some Calówords, as well as asked whether they thought it was “useful” to know how to speak Caló. Variousstatistical methods have been used in order to establish whether or not the results are statisticallysignificant. The results of the analysis indicate that the attitudes differ towards Caló and Calóspeakers, depending on the informant’s (a) ethnicity (b) contact with Caló as well as with Calóspeakers, and (c) gender. It is those who – in their own opinion – belong to the ethnic group Calé, as wellas those who claim that they have some contact with the variety and its speakers, who show positiveattitudes in both parts of the study. The women also show more positive attitudes than the men. It is alsopossible to note positive attitudes towards the variety and its speakers among the subjects with a highlevel of knowledge of Caló words, as well as among those with the highest willingness to use Caló. These observations suggest that a revitalization project of the variety Caló has a clear chance ofbeing successful.

Propuesta de una cartilla educativa que ilustra la problem?tica de miner?a de carb?n en el r?o Mel?ndez de Cal?

La presente propuesta educativa, propone y dise?a una cartilla que informa y educa a la comunidad educativa acerca de la problem?tica de extracci?n minera de carb?n presente en el rio Mel?ndez. Con esto se pretende evidenciar la situaci?n, con el fin de que se reconozcan los graves da?os que estas pr?cticas ocasionan no solo a nivel ambiental sino tambi?n social. Este trabajo se enmarca en una metodolog?a cualitativa, presentada en dos fases, que finalizando permitieron la creaci?n de una cartilla educativa que responde a todos los objetivos y planteamientos realizados en el presente trabajo.

Sea-level control on the connection between shelf-edge deltas and the Bourcart canyon head (western Mediterranean) during the last glacial/interglacial cycle

A dense grid of high- and very high resolution seismic data, together with piston cores and borehole data providing time constraints, enables us to reconstruct the history of the Bourcart canyon head in the western Mediterranean Sea during the last glacial/interglacial cycle. The canyon fill is composed of confined channel–levee systems fed by a series of successively active shelf fluvial systems, originating from the west and north. Most of the preserved infill corresponds to the interval between Marine Isotope Stage (MIS) 3 and the early deglacial (19 cal ka BP). Its deposition was strongly controlled by a relative sea level that impacted the direct fluvial/canyon connection. During a period of around 100 kyr between MIS 6 and MIS 2, the canyon “prograded” by about 3 km. More precisely, several parasequences can be identified within the canyon fill. They correspond to forced-regressed parasequences (linked to punctuated sea-level falls) topped by a progradational-aggradational parasequence (linked to a hypothetical 19-ka meltwater pulse (MWP)). The bounding surfaces between forced-regressed parasequences are condensed intervals formed during intervals of relative sediment starvation due to flooding episodes. The meandering pattern of the axial incision visible within the canyon head, which can be traced landward up to the Agly paleo-river, is interpreted as the result of hyperpycnal flows initiated in the river mouth in a context of increased rainfall and mountain glacier flushing during the early deglacial.

Efeitos da adição da cal hidratada na estabilização de um solo sedimentar para pavimentação urbana na região de Curitiba

Urban paving is of paramount importance for a city, both socioeconomic and in quality of life. The urban flooring not different so-called road surface are constituted by a set of horizontal layers, overlaid on the ground, which have the main function of supporting the actions induced by the vehicle redistributing the stresses transmitted to the ground. Soils are important materials for the execution of paving, mainly because they are part of the basic structure of the floor and mostly be available in abundance, with a very low cost, however, their properties usually do not meet the requirements necessary to perform the floor. The soil stabilization for the implementation of urban pavement bases and sub-bases is an increasingly important aspect in the current situation, because always there is the concern with the environment, and there is now the clear awareness that every effort should be made to minimize the effects caused by the exploitation of deposits and deposition of material. In this sense this work presents the effects of adding different proportions of lime to stabilize a sedimentary soil sample from the urban area of the city of Curitiba. It selected a sample quantity of soil in the region to study the stabilization insertion of hydrated lime type (CHIII) powder. The two variables in the study are related to the content of lime mixed with the soil at 0% percentages of 3%, 6%, 8% and 16%, and cure times at which these mixtures were subjected to (0, 7, 14, 28 and 56 days). The tested mixtures were prepared from dosages defined by two methods: one checking the chemical behavior of the samples by means of changes in pH values, and the second analyzing the mechanical behavior through the RCS values. It has been found that the chemical stability analyzed by addition of lime, provided an average increase of RCS in most soil samples studied, because of some physical and chemical characteristics thereof. For mixtures with 6%, 8% and 16% of lime after 28 days of curing, the average RCS was 0,57 MPa, 1,06 MPa and 2,37 MPa, respectively, for the normal proctor, and as for intermediate proctor, in the same curing time and on the same percentages RCS results were 0,54 MPa, 1,04 MPa and 2,71 MPa, respectively. In global terms, the soil-lime mixtures studied showed acceptable behavior by law to use as layers of sub-base. However, only the mixture with 16% of lime, at 28 days, is recommended for use on floors bases. Even so, the mixtures studied constitute a good alternative economic and socio-environmental.

Material para construção civil a partir de lodo de estação de tratamento de água, lama de polimento de mármore e resíduo de produção de cal

The rapid population growth is the great motivator for the development of the construction industry and the increased demand for drinking water, resulting in a gradual increase in the generation of solid waste. Thus, this work was carried out in order to recycle industrial and municipal wastes incorporating them into materials for civil construction. The composite produced from water treatment sludge and marble polishing mud, applying lime production waste as a binder, was evaluated for its mechanical performance and its morphological structure. The raw materials were characterized for their chemical composition, mineralogy, morphology, particle size and also the moisture content. With the featured materials nine compositions have been developed varying the content of the water treatment sludge between 25 to 50%, marble polishing mud between 35 to 50% and the lime production waste between 10 to 30%. The composites were subjected to mechanical strength tests, water absorption, chemical and mineralogical composition and morphology. The developed materials presented, on the 3rd day of hydration, maximum strength value of 4.65 MPa, the 7th day 6.36 MPa, on the 14th day 6.74 MPa, the 28th day 5.98 MPa, on the 60th day 8.52 MPa at 90th day 11.75 MPa and 180th day 12.06 MPa. The water absorption values after 28 days of hydration ranged from 16.27% to 26.32% and after 90 days, from 13.57% to 23.56%.

Argamassas de terra e cal - Características e campos de aplicação

As argamassas mistas de cal e terra devem ter resultado da prática profissional quando as condições económicas foram possibilitando a adição de cais aérea às argamassas vernaculares só de terra. Baixas adições de cal aérea a argamassas de terra têm conduzido a drásticas alterações da cor e das resistências mecânicas das argamassas de terra. No entanto, a substituição parcial de massa de cal por terra em argamassas de cal ao traço volumétrico 1:2 (correspondendo a argamassas com traço em massa de 1:8, com substituições de 10% a 50%) resulta em argamassas mais ecológicas e que tecnicamente indiciam ser adequadas para aplicação em rebocos de edifícios antigos e mesmo em construção nova com características compatíveis. Os resultados obtidos foram particularmente interessantes para uma substituição de 10% mas muito há ainda a fazer para um conhecimento aprofundado deste tipo de argamassas mistas de cal e terra, muito utilizadas no passado, com vista à otimização de formulações que possam vir a ser aplicadas correntemente.

Indução de morte celular em células de adenocarcinoma cervical humano (HeLa) pela lectina da esponja Cinachyrella apion (CaL)

Cancer is a term used to represent a set of more than 100 diseases, including malignant tumors from different locations. The malignancies are the second leading cause of death in the population, representing approximately 17% of deaths of known cause. Strategies that induce differentiation have had limited success in the treatment of established cancers. In this work, a lectin purified from the marine sponge Cinachyrella apion (CaL) was evaluated due to its hemolytic, cytotoxic and antiproliferative properties, besides the ability to induce cell death via apoptosis in tumor cells. The antiproliferative activity of CaL was tested against cell lines, with the highest inhibition of tumor growth for HeLa, reducing cell growth at a dose dependent manner, with a concentration of 10 μg/mL. The hemolytic activity and toxicity against peripheral blood cells were tested using the concentration of IC50 for both trials and twice the IC50 for analysis in flow cytometry, indicating that CaL is not toxic to these cells. To assess the mechanism of cell death caused by CaL in HeLa cells, we performed flow cytometry and western blotting. The results showed the lectin probably induces cell death by apoptosis activation by pro-apoptotic protein Bax, promoting mitochondrial membrane permeabilization, cell cycle arrest in S phase, with accumulation of cells of approximately 57% in this phase, and acting as both dependent and/or independent of caspases pathway. These results suggest that CaL has the potential to be used as drug treatment against cancer.

Utilização de resíduos de catalisador (ECAT) e cinzas da casca de arroz (CCA) na elaboração de vidros silicatos soda-cal destinados a embalagem

Dissertação (Mestrado em Tecnologia Nuclear)

The Ponto-Caspian basin as a final trap for southeastern Scandinavian Ice-Sheet meltwater

This paper provides new data on the evolution of the Caspian Sea and Black Sea from the Last Glacial Maximum until ca. 12 cal kyr BP. We present new analyses (clay mineralogy, grain-size, Nd isotopes and pollen) applied to sediments from the river terraces in the lower Volga, from the middle Caspian Sea and from the western part of the Black Sea. The results show that during the last deglaciation, the Ponto-Caspian basin collected meltwater and fine-grained sediment from the southern margin of the Scandinavian Ice Sheet (SIS) via the Dniepr and Volga Rivers. It induced the deposition of characteristic red-brownish/chocolate-coloured illite-rich sediments (Red Layers in the Black Sea and Chocolate Clays in the Caspian Sea) that originated from the Baltic Shield area according to Nd data. This general evolution, common to both seas was nevertheless differentiated over time due to the specificities of their catchment areas and due to the movement of the southern margin of the SIS. Our results indicate that in the eastern part of the East European Plain, the meltwater from the SIS margin supplied the Caspian Sea during the deglaciation until ∼13.8 cal kyr BP, and possibly from the LGM. That led to the Early Khvalynian transgressive stage(s) and Chocolate Clays deposition in the now-emerged northern flat part of the Caspian Sea (river terraces in the modern lower Volga) and in its middle basin. In the western part of the East European Plain, our results confirm the release of meltwater from the SIS margin into the Black Sea that occurred between 17.2 and 15.7 cal kyr BP, as previously proposed. Indeed, recent findings concerning the evolution of the southern margin of the SIS and the Black Sea, show that during the last deglaciation, occurred a westward release of meltwater into the North Atlantic (between ca. 20 and 16.7 cal kyr BP), and a southward one into the Black Sea (between 17.2 and 15.7 cal kyr BP). After the Red Layers/Chocolate Clays deposition in both seas and until 12 cal kyr BP, smectite became the dominant clay mineral. The East European Plain is clearly identified as the source for smectite in the Caspian Sea sediments. In the Black Sea, smectite originated either from the East European Plain or from the Danube River catchment. Previous studies consider smectite as being only of Anatolian origin. However, our results highlight both, the European source for smectite and the impact of this source on the depositional environment of the Black Sea during considered period.

Palaeo-geoecological significance of Pleistocene trees in the Lluta Valley, Atacama Desert

In the Lluta Valley, northern Chile, climate is hyperarid and vegetation is restricted to the valley floors and lowermost footslopes. Fossil tree trunks and leaves of predominantly Escallonia angustifolia, however, are abundant up to ∼15 m above the present valley floor, where they are intercalated with slope deposits, reflecting higher water levels in the past. A total of 17 samples have been radiocarbon dated, yielding ages between 38 and 15k cal a BP. The youngest ages of 15.4k cal a BP are interpreted as reflecting the beginning of river incision and lowering of the valley floor, impeding the further growth of trees at higher parts of the slopes. The most plausible scenario for this observation is intensified river incision after 15.4k cal a BP due to increased stream power and runoff from the Río Lluta headwaters in the Western Cordillera and Altiplano corresponding to the highstand of the Tauca and Central Andean Pluvial Event (CAPE) wet phase.

Estudo da incorporação da cal em composições binárias de solo-cimento para produção de tijolos maciços

The use of binders in the soil for the production of solid bricks is an old construction technique that has been used by several civilizations over time. At the same time, the need for environmental preservation and the tendency of scarcity of natural resources make the construction invest in researching new concepts, methods and materials for building systems for the sustainability of their economic activities. Thus arises the need to obtain building materials with low power consumption, capable of reducing the growing housing shortage of rural and urban population. Currently, research has been conducted on this topic to better understand the cementitious and pozzolanic reactions that occur in the formation of the microstructure of the soil-cement when added to other materials such as, for example, lime, and the relationship between microstructure and formed interfaces with the physical, mechanical and chemical analysis in compounds made from these ternary compositions. In this context, this study aimed to analyze the results of the influence of the incorporation of lime to the soil-cement to form a ternary mixture to produce soil-cement bricks and mortar without structural purposes. From the inclusion of contents of 6 %, 8 %, 10% and 12% lime to the soil, and soil-cement mixes in amounts of 2 %, 3 %, 4 % and 5 % were shaped-bodies of -cylindrical specimens to determine the optimum moisture content and maximum dry apparent specific weight. Then they were cured, and subjected to the tests of compressive strength, absorption and durability modified. Compositions obtained the best results in the tests performed on the bodies-of-proof cylindrical served as a parameter for molding of solid bricks, which underwent the same experimental methodology previously cited. The raw materials used, as well as compositions in which the bricks were molded solid, were characterized by physical and chemical tests, X-ray diffraction and scanning electron microscopy. The results obtained in the study indicate that the compositions studied, that showed the best results in terms of compressive strength, water absorption and durability ternary composition was soil, 10 % cement and 2 % lime

Efecto de la utilización de cal viva como aditivo sobre los parámteros de fermentación y la calidad nutricional en el ensilaje de pasto kikuyo (Pennisetum clandestinum), papa (Solanum tuberosum) y arveja (Pisum Sativum)

Tesis (Zootecnista). -- Universidad de La Salle. Facultad de Ciencias Agropecuarias. Programa de Zootecnia, 2013

Optimización del pelado de maíz con cal a utilizarse como estrategia de descontaminación de fumonisinas

Objetivo: En este estudio, el proceso de pelado de maíz con cal(PPC) fue documentado y sus parámetros optimizados mediante un diseño experimental, con el fin de conseguir un pelado completo del maíz con el mínimo grado de contaminación con fumonisinas. La presencia de fumonisina B1 (FB1) en el maíz fue analizada mediante HPLC-RP-FLD. Metodología: Los experimentos se realizaron a partir de un lote de maíz en grano seco conformado por submuestras provistas por agricultores seleccionados del cantón Nabón de la provincia del Azuay en base a un trabajo de investigación previo realizado por el proyecto VLIR-IUC, “Nutrición, Alimentación y Salud”. El diseño experimental fue divido en tres etapas: la caracterización de proceso, el mismo que se realizó mediante encuestas y observaciones in situ; pruebas de agotamiento de cal para el PPC, las que se realizaron partiendo de los datos recogidos en la primera etapa, y las pruebas de evaluación del PPC en la reducción de fumonisinas B1. Resultados y conclusiones: Se observó que, independiente de la concentración de cal utilizada, la etapa de pelado produjo una reducción de 8.73 veces la concentración de FB1 del maíz crudo (P=0.030), y que el maíz pelado y cocinado presentó una reducción de 9.14 veces (P=0.019). Recomendaciones: Se recomienda continuar con la experimentación para elucidar si la reducción de FB1se debió al proceso mecánico de remoción de la cáscara, o a la transformación química en su forma hidrolizada, por lo que este trabajo podría considerarse como un estudio explorativo preliminar.