Results 61 to 70 of about 622 (263)

Mineralogical and geochemical features of alluvial gold and bismuth minerals from within the Yarotashor quartz-vein gold field (Subpolar Urals): Forecasting the primary gold source

Руды и металлы
Generalization of results of a long-term study of the placer gold mineralogy of the Nyartayu and Khobeyu rivers and their tributaries has made it possible to identify a primary gold-bearing potential of the area.
Ludmila Ivanovna Efanova, Kseniya Gennadievna Parkhacheva, Boris Aleksandrovich Makeev   +2 more
doaj   +1 more source

Model‐Guided Design of Paper Membrane Architectures for Controlled Flow and Enhanced Diagnostic Sensitivity

Advanced Engineering Materials, EarlyView.
Geometrical modifications on nitrocellulose membranes can result in observable differences in signal intensity relative to a reference membrane (top and bottom left). Using two reference experiments, we have developed a theoretical model that can reproduce the experimentally observed flow changes and provide information on membrane parameters, e.g ...
Maria Dimaki, Lea Holritz, Winnie E. Svendsen   +2 more
wiley   +1 more source

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Terrigenous Tertiary Gold Bearing Strata: World Distribution, Economic Significancy and Modern Placer Formation Capacity

Russian Journal of Earth Sciences
The article is dedicated to estimation of tertiary terrigenous strata role in world gold mining. Localization peculiarities of tertiary gold deposits and their placers were examined.
Vladimirceva Ol'ga, Lalomov Alexander, Prasolov Alexander, Orlov Sergei   +3 more
doaj   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

Economic Evaluation of Placer Gold Along River Indus From Ghazi to Kund, Khyber Pakhtunkhwa, Pakistan: Implications for Commercial Scale Pilot Plant

International Journal of Economic and Environment Geology, 2019
A detailed study was conducted on Indus river in order to evaluate the economic potential. Samples were collected for geochemical studies from both stream sediments (SS) and heavy mineral concentrates (HMC) along Indus river from Ghazi, Hund, Beka ...
Liaqat Ali, Sajjad Ahmad, Seema Anjum Khattak, Naveed Anjum, Muhammad Waseem, Asghar Ali
doaj  

Characteristics of native gold at Kosumnerskoe placer gold deposit (the Nether-Polar Urals)

Известия высших учебных заведений: Геология и разведка, 2018
The paper presents the results of a study of heavy mineral concentrates of Kosumnerskoe gold deposit as well as the native gold from them. This gold deposit includes two gravel deposits.
M. A. Boguslavskiy, S. O. Khudyakov
doaj   +1 more source

From Food to Power: Hydrogel Thermoelectrics for Ingestible Electronics

Advanced Functional Materials, EarlyView.
We introduce a fully edible thermoelectric–electrochromic platform that harvests heat from food and converts it into a visible color change. N‐type and p‐type hydrogel thermoelectric generators connected in series power anthocyanin‐based electrochromic displays, demonstrating the feasibility of safe, biodegradable, ingestible systems for on‐food ...
Antonia Georgopoulou, Bokeon Kwak, Dario Floreano, Esther Amstad   +3 more
wiley   +1 more source

Fully Additive Vertical Organic Electrochemical Transistors on Renewable and Compostable Substrates Enable Ultrasensitive Bioelectronics

Advanced Functional Materials, EarlyView.
Fully additive vertical organic electrochemical transistors (vOECTs) with channel‐length of 226 nm on a 50 µm compostable substrate achieve >106 current modulation and ∼36 mS transconductance. Ion‐selective integration enables 1.1 mA dec−1 sensitivity and 36 µm detection limit, highlighting a scalable platform for sustainable electronics and ...
Giulia Frusconi, Samuele Lavelli, Zsolt M. Kovács‐Vajna, Fabrizio Torricelli   +3 more
wiley   +1 more source

Titanium Suboxides Responsible for Electronic Anomaly Near Room Temperature in the Ti3C2Tx MXene

Advanced Functional Materials, EarlyView.
Our multi‐technique study reveals that the near‐room‐temperature anomaly in Ti3C2Tx MXene is linked to titanium suboxide nanodomains, including Ti3O5, embedded within the MXene host. Their temperature‐driven transformation provides an alternative explanation to solvent‐ and swelling‐based models and offers new insight into the thermally activated ...
Bence G. Márkus, Bradlee J. McIntosh, Lili Vajtai, Anna Nyáry, Sándor H. Sipos, Nirmal J. Ghimire, Ferenc Simon, László Forró, Dávid Beke   +8 more
wiley   +1 more source