Results 81 to 90 of about 51,466 (294)

Los minerales son inocentes; las personas, no (minerales y personas)

Enseñanza de las Ciencias de la Tierra, 2008
Se proponen una serie de temas para hacer pequeños trabajos de aula o de investigación complementarios a la materia Biología y Geología. Son temas que relacionan, por una parte, el uso de los minerales en la vida diaria y, por otra, la extracción de los minerales y la explotación de las personas. Creemos que han de ser, tanto para el alumnado como para
Consorci del Museu de Ciències Naturals de Barcelona, Santó, Rosa, Curto, Carles   +2 more
openaire   +3 more sources

Contenido mineral de cafés de diferente altitud del Estado de Guerrero, México

Ecosistemas y Recursos Agropecuarios
En las regiones Montaña, Costa Grande y Chica del Estado de Guerrero, México; el cultivo de café (Coffea arabica L.) es una actividad estratégica importante para la población indígena y campesina.
Oscar Martín Antúnez Ocampo, Cristo Omar Puente-Valenzuela, Mariana Espinosa-Rodríguez, Juan Elías Sabino-López, Luis Antonio Flores-Hernández   +4 more
doaj   +1 more source

The Effect of Hydrophilic Headgroup Chemistry on Peptoid‐Directed Mineralization of CaCO3

Advanced Functional Materials, EarlyView.
Amphiphilic peptoids alter the pathway and outcome of calcium carbonate crystallization, which progresses through amorphous calcium carbonate (ACC) to vaterite to calcite rhombs in the absence of peptoids. In contrast, amine‐terminated peptoids produce vaterite disks and carboxyl‐terminated peptoids produce calcite mesocrystals.
Biao Jin, Chunhui Wu, Thi Kim Hoang Trinh, Wenhao Zhou, Chun‐Long Chen, James J De Yoreo   +5 more
wiley   +1 more source

Intracrystalline Void‐Mediated Toughening of Brittle Crystals in Quail Eggshells

Advanced Functional Materials, EarlyView.
In quail eggshells, the high density and disordered arrangement of intracrystalline voids inhibit lattice cleavage, suppress long‐range crack propagation, and promote deformation twinning and quasi‐plasticity, serving as an essential toughening motif. We show that these voids remain within a narrow subcritical size range and therefore predominantly do ...
Jingxiao Zhong, Qihang Wang, Andre E. Vellwock, Sinuhe Perea Puente, Tingting Zhu, Jia Hui Lim, Kadda Medjoubi, Sebastian Hoerl, Erika Griesshaber, Wolfgang W. Schmahl, Yannicke Dauphin, Emeline Raguin, Peter Werner, Francesco Stellacci, Michael V. Swain, Peter Fratzl, Shahrouz Amini   +16 more
wiley   +1 more source

Guía de minerales de alteración de la República Argentina [PDF]

, 2008
Fil: Palacio, María de Belén. Servicio Geológico Minero Argentino. Instituto de Geología y Recursos Minerales; Argentina.Fil: Godeas, Marta Carmen. Servicio Geológico Minero Argentino.
Godeas, Marta Carmen, Palacio, María de Belén   +1 more
core   +1 more source

Dynamic Observation of Lacy Pattern Formation in a Bone Tissue Model Using Liquid Phase Scanning Transmission Electron Microscopy

Advanced Functional Materials, EarlyView.
Here, we establish a low‐dose liquid‐phase electron microscopy workflow for real‐time observation of biological processes in hydrated conditions. Beam damage is reduced by imaging only 20% of the pixels and reconstructing the complete image using an inpainting algorithm.
Luco Rutten, Avital Wagner, Rona Roverts, Luco Buise, Ben Joosten, Anat Akiva, Elena Macías‐Sánchez, Nico Sommerdijk   +7 more
wiley   +1 more source

Evaluation of the Concept that Pumahuasi Veins Indicate a Potential for the Existence of Underlying Undiscovered Sedex Deposits, Northern Argentina [PDF]

, 2001
Fil: Sangster, Alan L. Servicio Geológico Minero Argentino. Instituto de Geología y Recursos Minerales; Argentina.Fil: Sangster, Donald F. Servicio Geológico Minero Argentino.
Sangster, Donald F., Sangster, Alan L.
core   +1 more source

Emergence of a Hexagonal Fe2S2 Single Layer Without a Bulk Counterpart via Phase Transformation

Advanced Functional Materials, EarlyView.
Upon annealing, single‐layer Mackinawite iron sulfide transforms into a previously unknown hexagonal Fe2S2${\rm Fe}_2{\rm S}_2$ phase with β$\beta$‐CuI structure. STM, LEED, and first‐principles calculations identify the structure and show that electronic correlations and magnetic order are important for its stability.
Affan Safeer, Wejdan Beida, Felix Oberbauer, Nicolae Atodiresei, Gustav Bihlmayer, Max Wolfertz, Chiara Schlichte, Wouter Jolie, Stefan Blügel, Jeison Fischer, Thomas Michely   +10 more
wiley   +1 more source

Actualización geológica y económica de recursos minerales de Argentina: Aluminio

Fil: Herrmann, Carlos. Servicio Geológico Minero Argentino. Instituto de Geología y Recursos Minerales; Argentina.Fil: González, Jorge Matías. Secretaría de Minería. Subsecretaría de Desarrollo Minero; Argentina.Fil: Cruz, Manuel Máximo.
Herrmann, Carlos, Cruz, Manuel Máximo, González, Jorge Matías   +2 more
core   +1 more source

Architectural Tuning of Bouligand Electrospun Laminates Enables Coupled Mechanical Robustness and Electromechanical Sensing

Advanced Functional Materials, EarlyView.
Bioinspired Bouligand architectures are translated into biodegradable polymer laminates with integrated sensing, revealing how structural design governs multifunctional performance. A 20° interlayer rotation optimizes strength, flexibility, and electromechanical response, while embedded nanotube networks enable real‐time damage detection and wearable ...
Piotr K. Szewczyk, Daniel P. Ura, Michał Kopacz, Katarzyna Marszalik, Urszula Stachewicz   +4 more
wiley   +1 more source