Results 131 to 140 of about 581,271 (305)

Robust Polymer Hydrogels Improve Electric‐Fish‐Inspired Batteries

Advanced Functional Materials, EarlyView.
ABSTRACT Electric‐fish‐inspired hydrogel batteries based on ion‐concentration gradients offer an attractive route to soft power sources; however, the poor mechanical properties of existing hydrogels limit device assembly and performance. Here, we report poly(ethylene glycol) methyl ether acrylate hydrogels that enable ion‐gradient batteries composed of
Nick Zahnd, Satyajit Das, John Marc C. Puguan, Carolina Pierucci, Michael Mayer, Christoph Weder   +5 more
wiley   +1 more source

Soil Fertility Protocol [PDF]

, 2003
The purpose of this resource is to measure the amounts of nitrogen, phosphorous and potassium in each horizon in a soil profile. Using a NPK test kit, students mix a dry, sieved soil sample into a solution and chemically extract the N, P, and K as ...
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
core  

Toward Stable Multivalent Metal Batteries: Understanding the Interfacial Chemistry for Magnesium and Calcium Metal Anodes

Advanced Functional Materials, EarlyView.
Interphase chemistry governs the stability of multivalent metal batteries. We summarize state‐of‐the‐art developments in calcium and magnesium metal batteries by focusing on the correlation among electrolytes, interphase layers, and the electrochemical performance of corresponding metal anodes.
Huijun Lin, Qi Meng, Juncai Long, Chuheng Cao, Zheng‐Long Xu   +4 more
wiley   +1 more source

Tissue‐Stimulator Platform for Electrically Stimulating Pancreatic β‐Cells for Long‐Term Functional Regulation

Advanced Functional Materials, EarlyView.
We present a tissue‐stimulator platform for seamless electrode integration with pancreatic tissue, applying uniform electrical stimulation through optimized design with biohybrid 3D printing. Advantageous effects of electrical stimulation on β‐cell function were observed, including enhanced calcium signaling, islet morphology, and maturation.
Jihwan Kim, Uijung Yong, Myungji Kim, Jaewook Kim, Yeonggwon Jo, In Kyong Shim, Song Cheol Kim, Jinah Jang   +7 more
wiley   +1 more source

The Terminal Domains of Collagen‐Like Silk Direct Molecular Interactions and Liquid–Liquid Phase Separation‐Mediated Material Assembly

Advanced Functional Materials, EarlyView.
Terminal domains of recombinant collagen‐like silk regulate hierarchical self‐assembly across molecular and material scales. We show that terminal domains of collagen‐like silk enhance triple‐helix stability and drive liquid–liquid phase separation, enabling reversible formation of fibers and self‐healing films.
Mengjie Shen, Daniil Astapov, Nur Alia Oktaviani, Mami Goto, Keiji Numata, A. Sesilja Aranko   +5 more
wiley   +1 more source

Solvent‐Free Manufacturing of Multifunctional Gas Diffusion Electrode Architectures for Enhanced CO2 Conversion From Low‐Concentration Streams

Advanced Functional Materials, EarlyView.
A tandem gas diffusion electrode (GDE) leveraging hierarchically engineered microgranules enables efficient CO2 electroreduction under dilute CO2 conditions. A key innovation lies in the solvent‐free precision assembly of metal–organic‐frameworks, carbon nanotubes, and copper nanoparticles.
Kai‐Jen Wu, Carter Racine, Ahmed Badreldin, Shengyao Wang, Zongsu Han, Hong‐Cai Zhou, Ying Li, Heng Pan   +7 more
wiley   +1 more source

Polarographic Determination of Potassium in Uranium Compounds

Croatica Chemica Acta, 1965
The A. C. polarographic method is proposed for the determination of potassium in precipitates of the system: uran yl nitratepotassium hydroxide-potassium nitrate. Samples containing potassium and uranium were dissol ved in 4 M nitric acid, present u ranium was r emoved by continuous extraction with tetrahydropyrane.
Tomažić, B ., Branica, M.
openaire   +2 more sources

MXene/PEDOT Functional Coatings on Flexible Microelectrode Arrays for Multianalyte In Vivo Neurochemical Sensing and Electrophysiology

Advanced Functional Materials, EarlyView.
A MXene/PEDOT coating enables multimodal functionality and dual‐analyte detection of dopamine and serotonin in flexible microelectrode arrays while enhancing electrophysiological recording quality. The anti‐fouling, low‐impedance interface overcomes key limitations of conventional coatings, providing a robust and versatile platform to investigate the ...
Ilaria Gatti, Karamullah Eisawi, Umisha Siwakoti, Greyson Jadwin, Ashmita Sigdel, Michela Chiappalone, Deepak Kumbhare, Michael Naguib, Elisa Castagnola   +8 more
wiley   +1 more source

Louis-Jacques Thenard.

Revista CENIC Ciencias Químicas, 2002
To Louis-Jacques Thenard (1777-1857) we owe the discovery of hydrogen peroxide and boron, the isolation of potassium and sodium by chemical means (together with Gay-Lussac), and the synthesis of many of their compounds, such as potassium amide and boron ...
Jaime Wisniak
doaj  

Solvent Co‐Intercalation Enabled Ca Storage in MoS2 for Ca‐Ion Batteries

Advanced Functional Materials, EarlyView.
Regulating electrolyte solvation levels enables otherwise non‐intercalatable Ca2+ ions to reversibly co‐intercalate into molybdenum disulfide (MoS2) as ether‐solvated species. The intercalation reversibility is strongly governed by solvent chain length, as demonstrated using diethylene glycol dimethyl ether (G2) and tetraethylene glycol dimethyl ether (
Yudong Luo, Matthias Golomb, Yupei Han, Pan He, Neubi Xavier, Wanjun Ren, Yi Lu, Matthew Hopper, Henry R. Tinker, Qiong Cai, Yang Xu   +10 more
wiley   +1 more source