Results 41 to 50 of about 7,701 (219)

Co‐Impregnated MgAl Layered Double Hydroxide as an Efficient Catalyst for Glycerol Oligomerization

Applied Organometallic Chemistry, Volume 40, Issue 1, January 2026.
A cobalt(II) acetylacetonate–impregnated MgAl LDH catalyst was developed, showing enhanced basicity and superior activity in glycerol oligomerization, achieving 68% conversion and 27% diglycerol selectivity. The catalyst maintained high performance over three recycling cycles, with structural and surface modifications confirmed by comprehensive ...
Fernando José Soares Barros, Ramón Moreno‐Tost, Juan A. Cecilia, Francisco Murilo Tavares de Luna, Enrique Rodríguez‐Castellón, Rodrigo Silveira Vieira   +5 more
wiley   +1 more source

Clays for Low‐Carbon Cements: Overview, Progress, and Challenges

Global Challenges, Volume 10, Issue 1, January 2026.
This review provides a critical overview of recent developments of activated clays to function as artificial pozzolans. After a thorough description of the clays that yield good pozzolanic performances, selected examples are given on thermal and mechanical activations. Chiefly, general correlations are extracted from reported data despite its scattered
Imane Koufany, Isabel Santacruz, Angeles G. De la Torre, María D. Rodríguez‐Ruiz, Miguel A. G. Aranda   +4 more
wiley   +1 more source

Templated Tube Growth About a Reactive Gas Plume: The Pharaoh's Serpent Reaction, Thermodecomposition of Mercury Thiocyanate in Air

ChemSystemsChem, Volume 8, Issue 1, January 2026.
XX XX ABSTRACT The pharaoh's serpent reaction, the thermodecomposition of mercury thiocyanate in air, is a classic chemical demonstration. We analyse and characterize the reaction products, composed of two different phases, graphitic carbon nitride, C3${\rm C} _3$N4${\rm N} _4$, and metacinnabar, HgS.
Carlos Pimentel, Sergio Testón‐Martínez, Carlos Gutierrez‐Ariza, C. Ignacio Sainz‐Díaz, Julyan H. E. Cartwright   +4 more
wiley   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès, Guillem Gisbert, Helena Albert, Adelina Geyer, Meritxell Aulinas, Raquel Arasanz, Jordi Ibañez‐Insa, Antonio Polo‐Sánchez, Antonio Álvarez‐Valero, Olga Prieto‐Ballesteros, Santiago Giralt   +10 more
wiley   +1 more source

Características de plasticidade de argilas para uso em cerâmica vermelha ou estrutural

Cerâmica, 1999
Nos estudos de caracterização de argilas plásticas para uso em cerâmica vermelha é usual a determinação das características mineralógicas por ATD e de plasticidade através dos índices de Atterberg. Os métodos convencionais utilizados para determinação do
L. F. A. Campos, R. S. de Macedo, P. K. Kiyohara, H. C. Ferreira   +3 more
doaj  

Chemical and isotopic characterization of nitrate retained and leached from soil after manure fertilization-by lysimeter experiments [PDF]

E3S Web of Conferences, 2019
Increase of soil fertilization produces an increase of N exported to the hydrosphere. The amount of nitrate that reaches the aquifers is controlled by processes affecting N-species within the soils.
Otero Neus, Llovet Alba, Carrey Raúl, Ribas Angela, Domene Xavier, Mattana Stefania, Chin-Pampillo Juan, Alcañiz Josep Mᵃ, Soler Albert   +8 more
doaj   +1 more source

Gipsgärten: Selbstorganisierte röhrenförmige Strukturen aus Calciumsulfat mit Relevanz für die Suche nach außerirdischem Leben

Angewandte Chemie, Volume 137, Issue 48, November 24, 2025.
Chemische Gärten sind selbstorganisierte abiotische Strukturen mit „lebensähnlichen” Formen. Hier zeigen wir, dass solche Prozesse auch nach Zugabe konzentrierter Sulfatlösungen zu festen Calciumsalzen ablaufen und sogenannte Gipsgärten ergeben. Die dafür nötigen Bedingungen sind weitgehend kompatibel mit den geochemischen Verhältnissen auf dem frühen ...
Selina Reigl, Elisabeth Wagner, Carlos Pimentel, Werner Kunz, Alexander E. S. Van Driessche, Matthias Kellermeier   +5 more
wiley   +1 more source

Logo Gruppo Nazionale di Mineralogia [PDF]

, 2016
Logo del Gruppo Nazionale di Mineralogia ...
Marco Pasero, Mauro Prencipe, Gabriella Salviulo, MARTUCCI, Annalisa, Paola Comodi   +4 more
core  

Mimetite and polymineralic mimetite-pyromorphite-vanadinite single crystals from the Sowie Mts, Poland

Mineralogia
Millimeter-sized crystals of mimetite and pyromorphite, and polymineralic mimetite-pyromorphite-vanadinite crystals occur in quartz-baryte vein within paragneisses of the Sowie Mts, SW Poland.
Szełęg Eligiusz, Janeczek Janusz, Juroszek Rafał, Danila Marta   +3 more
doaj   +1 more source

Gypsum Gardens: Self‐Assembled Tubular Structures of Calcium Sulfate with Relevance for the Detection of Extraterrestrial Life

Angewandte Chemie International Edition, Volume 64, Issue 48, November 24, 2025.
Chemical gardens are self‐assembled architectures with “life‐like” morphologies that form in the absence of any biological activity. Here we show that such structures can also be obtained by contacting reservoirs of calcium and sulfate ions, under conditions that plausibly emulate those prevailing on early Mars.
Selina Reigl, Elisabeth Wagner, Carlos Pimentel, Werner Kunz, Alexander E. S. Van Driessche, Matthias Kellermeier   +5 more
wiley   +1 more source