Results 51 to 60 of about 5,275 (176)
Revista Facultad de Ingeniería, 2017 Durante el proceso de microfundición de joyería con preengaste de gemas, el molde cerámico compuesto de sílice y yeso se estabiliza a temperaturas cercanas a 650 °C, mientras que la temperatura de vertido de la aleación preciosa ronda los 1000 °C.
Carlina Sofía Londoño-Montes +2 more
doaj +1 more source
TAXON, Volume 74, Issue 2, Page 386-416, April 2025.Abstract The post‐Miocene climatic history of arid environments in South America has been identified as a key driver of dispersal and diversification, particularly among plant groups such as Cactaceae. Despite their iconic status, many cactus genera remain poorly understood, and comprehensive taxonomic and systematic revisions using morphological and ...
Tim Böhnert +6 more
wiley +1 more source
Cartography of disaster areas in andean catchment of central Chile. Determination of risk sectors
Cuadernos de Investigación Geográfica, 2013 The geomorphic processes of the upper basin of the Maipo river (Central Chile) are studied in the hillslopes located between 870 and 3.000 m.a.s.l., using Landsat images, terrain analysis and interviews to local peoples.
V. Quintanilla Pérez
doaj +1 more source
Hydrological Processes, Volume 39, Issue 2, February 2025.The cryosphere represents a key hydrological control on local ecosystems in the semiarid Andes of Chile. This study uses the Cold Regions Hydrological Model to quantify glacio‐hydrological processes in a sub‐catchment of the Elqui River catchment for two relatively dry years (2019–2020 and 2020–2021). Results indicate that sublimation accounted for 66%–
Eduardo Yáñez San Francisco +2 more
wiley +1 more source
Análisis del comportamiento friccional de la mezcla de arena y yeso para su utilización en modelos análogos [PDF]
, 2017 El objetivo general del trabajo es definir la influencia del porcentaje de yeso de las mezclas en el comportamiento del material. Los objetivos específicos del trabajo son hacer experimentos con modelos análogos sobre las muestras de yeso/arena que se ...
Isern Jansat, Mireia
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Mecanismos de hidratación del yeso [PDF]
, 1991 There is an hypothesis that the mechanism o f gypsum hydration and dehydration is performed through two simultaneous phenomena. In this study we try to clear up this phenomenon using chlorides as accelerators or a mixture of ethanol-methanol as ...
Pacheco, G., Portilla, M.
core +2 more sources
Yeso reciclado con residuos de poliestireno expandido y fibra de celulosa para mejorar las propiedades térmicas del yeso [PDF]
, 2021 In this study, different proportions of gypsum composite reinforced with recycled cellulose fibers and expanded polystyrene were produced to study the properties of thermal conductivity, density, and flexural strength to be used as sealing plates to ...
K.A. De Oliveira +5 more
core +2 more sources
Comportamiento mecánico de yeso reforzado con polímeros sintéticos
Informes de la Construccion, 1988 Se presenta un estudio de la resistencia mecánica del yeso, basado en su refuerzo mediante la adición de polímeros sintéticos, en forma de fibras y dispersiones acuosas.
Alfonso García Santos
doaj +1 more source
Journal of Applied Ecology, Volume 61, Issue 12, Page 3040-3052, December 2024.Our study shows that stressful conditions may trigger individual‐level trade‐offs in resource allocation and population‐level compensation among demographic rates. Demographic shifts arising from reintroductions in different environmental conditions may be considered by managers as a potential mechanism of resilience against environmental change ...
Jesús Villellas +2 more
wiley +1 more source
Veta Yeso y Azufre (25.4.3-60) [PDF]
, 2018 Consulta detallada: http://museopetrografico.epn.edu ...
Robalino, Victoria
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