Results 11 to 20 of about 486 (134)
Tópicos de Investigación en Ciencias de la Tierra y Materiales, 2022 La clase de los carbonatos está representada en el Catálogo de Referencia del Mueso de Mineralogía de la UAEH por 78 fichas que van de la MCA-01 a la MCA-78.
Carlos Esquivel-Macías +5 more
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Anais da Academia Brasileira de Ciências, 2009 The late Cambrian - late Tremadocian La Silla Formation is a carbonate unit of the eastern Precordillera in Argentina whose facies indicate a shallow platform environment. Until this moment, there were no studies that referred to the diagenetic evolution
Mariana M. Raviolo +2 more
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Revista Bases de la Ciencia, 2023 En este trabajo, se estudió la actividad catalítica del acetato de samario (III) (SmAc3) como iniciador en la copolimerización de ε-caprolactona (CL) con la L-lactida (L-LA) y del o-fenantrolina-tris(glicina)-κ3COO-samario (III) (A3) como iniciador en ...
Jesús Miguel Contreras Ramírez +2 more
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Angewandte Chemie, Volume 136, Issue 39, September 23, 2024.The fluorenone‐bridged di‐NHC precursor H2‐1(PF6)2 reacts with Ag2O in CH3CN to give the [2]catenane [Ag4(1)4](PF6)4, which disintegrates in DMF into two metallarectangles [Ag2(1)2](PF6)2. Substitution of the imidazo[1,5a]pyridinium NHC precursors in H2‐1(PF6)2 for imidazolium groups yields di‐NHC precursors H2‐L(PF6)2 which react with Ag2O to yield ...
Jin‐Ping Chang +5 more
wiley +2 more sources
Estudios Geologicos, 1990 En este trabajo se hace un estudio de los contenidos en Sr, Fe y Mn en los carbonatos del Cretácico inferior del anticlinal de Santillana del Mar, Cantabria. Las rocas carbonáticas estudiadas incluyen calizas, dolomías y dolomías dedolomitizadas.
M. Bustillo, R. Fort
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Revista de Biología Tropical, 2012 Geographic Information Systems (GIS) applications used in marine habitats are powerful tools for management and monitoring of marine reserves and resources.
Jeffrey A. Sibaja-Cordero +3 more
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Estudos mecanísticos da hidrólise de ésteres carbonatos catalisada por imidazol.
Semina: Ciências Exatas e Tecnológicas, 2004 Foram examinados aspectos cinéticos e mecanísticos da hidrólise de carbonatos de p-X-fenil p-nitrofenila (X = MeO, Me, H, CI, CN, N02, série I) e carbonatos de bis-(p-X-fenila) (X = MeO, Me, H, CI, NO, série II), catalisada ...
Paulo Meneghelli +4 more
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Electrospun fibrous sorbents for the removal of uranium and americium from aqueous media
Polymer International, EarlyView.Polymethacrylate‐based electrospun microfibers with tertiary amino functionalities are evaluated as adsorbents for U‐232 and Am‐241 in both simplified and complex (seawater) water matrices, highlighting their ability for efficient actinide removal. Abstract Polymethacrylate‐based electrospun microfibers containing tertiary amino functionalities were ...
Andreas Hadjianastasi +4 more
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Estudio paleontológico de las tobas cuaternarias de Ocio (Álava, Cuenca Miranda-Trebiño)
GeogacetaEste trabajo ilustra y describe la asociación de microfósiles presentes en los tramos limosos de las tobas cuaternarias de Ocio (valle del río Inglares, Álava). La asociación consiste en una especie de carofita (Chara cf.
Xabier Murelaga Bereicua +7 more
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Structured machine learning modeling to support conservation of deep‐sea benthic biodiversity
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Biodiversity monitoring programs need to deliver accurate, timely, and actionable predictions. To establish a predictive monitoring program for deep‐sea benthos of the Santos Basin, Brazil, we developed a two‐stage structured model that allowed comparison of biodiversity predictions obtained from environmental simulations (2M‐Sim).
Gustavo Fonseca +23 more
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