Results 71 to 80 of about 429,179 (286)

Mineralogical and geochemical effects due to hydrothermal alteration in the Los Azufres geothermal field, Mexico

Revista Mexicana de Ciencias Geológicas, 2018
To investigate the effects of hydrothermal alteration on the chemistry of volcanic rocks, we analyzed the whole rock chemical composition (major and trace elements, including rare-earth elements – REE) of two distinct portions of a drill well core sample
Ignacio S. Torres-Alvarado, Kailasa Pandarinath, Surendra P. Verma, Peter Dulski   +3 more
doaj  

Hydrothermal sediments record changes in deep water oxygen content in the SE Pacific

, 2010
The distribution of redox?sensitive metals in sediments is potentially a proxy for past ocean ventilation and productivity, but deconvolving these two major controls has proved difficult to date.
John Thomson, Heiko Pälike, Mills, R.A., Pälike, H., Rachel A. Mills, Taylor, S.L., Sarah L. Taylor, Thomson, John   +7 more
core   +1 more source

Biomass DNA: An Emerging Building Block for Advanced Materials

Advanced Materials, EarlyView.
Biomass DNA is rapidly emerging from its traditional role as a genetic blueprint to serve as a versatile abundant, highly programmable polymeric building block. This review highlights the transformation of macroscopic bulk biomass DNA into next generation of functional materials, spanning from dynamic hydrogels, sustainable bioplastics, and high ...
Yuwei Hu, Itamar Willner, Li Niu
wiley   +1 more source

TYPIZATION OF HYDROTHERMAL ALTERATIONS IN THE BOROV DOL DEPOSIT

Geologica Macedonica, 2022
For the study of hydrothermal alterations in the Borov Dol deposit, a total of 12 samples were taken, of which 10 samples from boreholes BD-335, BD-320 and BD-322, and 2 samples from the open pit mining of Borov Dol. The material for the X-ray diffraction analyses was also prepared from the samples from which petrographic preparations were made.
openaire   +1 more source

Defect‐Driven Charge Separation in Ba‐Doped SrTiO3: Correlating Photoelectrochemical Performance With Dye‐Selective Photocatalysis

Advanced Materials Interfaces, EarlyView.
Ba‐doped SrTiO3 perovskites establish a direct correlation between photoelectrochemical activity and photocatalytic performance. Optimized Ba0.5Sr0.5TiO3 exhibits enhanced charge separation, photocurrent generation, and visible‐light‐driven dye degradation through defect‐induced oxygen vacancies and lattice distortion.
Sagar A. Nikam, Somnath Ladhane, Vikas P. Mhaske, Gotan H. Jain, Sandesh R. Jadkar, Shashikant P. Patole, Ganesh E. Patil   +6 more
wiley   +1 more source

Life‐Like Ferrous Oxide Microspheres from Kombucha

Advanced Materials Interfaces, EarlyView.
Kombucha bacterial cellulose, sodium alginate, and ferrous nitrate self‐assemble into membrane‐enclosed iron oxide microspheres. These microspheres bud daughter vesicles, sustain 24‐h electrochemical oscillations, and filter theta‐band signals.
Panagiotis Mougkogiannis, Anna Nikolaidou, Andrew Adamatzky   +2 more
wiley   +1 more source

Early hydrothermal alteration stages at the giant San Rafael tin deposit, Peru

, 2019
International audienceAt the giant tin deposit of San Rafael, Peru, the early hydrothermal stages, preceding the economic tin mineralization, include successively: 1) potassic alteration represented by hydrothermal K-feldspar altering magmatic ...
Gialli, Stefano, Kouzmanov, Kalin, Laurent, Oscar, Fontboté, Lluís, Chauvet, Alain, Dini, Andrea, Kalin, Kouzmanov, Andrea, Dini, Harlaux, Matthieu, Kalinaj, Miroslav   +9 more
core   +6 more sources

Classification of Hydrothermal Alteration Types from Thin-Section Images Using Deep Convolutional Neural Networks

Applied Sciences
Hydrothermal alteration processes, including silicification, sericitization, carbonatization, chloritization, and epidotization, serve as critical indicators in the exploration of precious metal deposits.
Rıza Çenet, Emre Ünsal, Oktay Canbaz
doaj   +1 more source

Metal Compound‐Based Non‐Enzymatic Electrochemical Cholesterol Sensors: Emerging Materials and Mechanistic Insights

Advanced Materials Interfaces, EarlyView.
This review discusses recent progress in metal complex‐based, non‐enzymatic electrochemical sensors for cholesterol detection. We examine metal oxides, metal sulfides, and hybrid nanomaterials, highlighting their catalytic mechanisms and material design strategies.
Longfei (Jack) Yin, Chao‐Tsen (Rora) Chen, Jacopo Giaretta, Thanh‐Qua Nguyen, Hoang‐Phuong Phan, Fariba Dehghani, Syamak Farajikhah   +6 more
wiley   +1 more source

Scalable Production of Disordered Nickel‐Iron‐Aluminum Oxides as Stable Anodes for Water Electrolysis: The Role of Aluminum

Advanced Materials Interfaces, EarlyView.
Solution precursor plasma spraying enables the scalable fabrication of porous and disordered nickel‐iron‐aluminum oxide coatings as precious‐metal‐free anodes. Aluminum inhibits crystal growth, optimizes local atomic sites, and enhances charge and ion transport to accelerate reaction kinetics, leading to excellent performance and operational stability.
Tugce Ustunel, Joakim Bäckström, Esdras J. Canto‐Aguilar, Mouna Rafei, Litty Thomas Manamel, Mahesh Ramakrishnan, Konstantin Klementiev, Nina Grunditz, Erik Zimmerman, Thomas Wågberg, Susanne Holmin, Eduardo Gracia‐Espino   +11 more
wiley   +1 more source