Results 81 to 90 of about 22,231 (296)

Characterization of a SAM-dependent fluorinase from a latent biosynthetic pathway for fluoroacetate and 4-fluorothreonine formation in Nocardia brasiliensis [v1; ref status: indexed, http://f1000r.es/2tz]

F1000Research, 2014
Fluorination has been widely used in chemical synthesis, but is rare in nature. The only known biological fluorination scope is represented by the fl pathway from Streptomyces cattleya that produces fluoroacetate (FAc) and 4-fluorothreonine (4-FT).
Yaya Wang, Zixin Deng, Xudong Qu
doaj   +1 more source

Engineering a Fluorinated AlPO4 Interface: Toward High Initial Coulombic Efficiency and Stable Oxygen Redox in Li‐Rich Layered Oxide Cathodes

Advanced Functional Materials, EarlyView.
We report a chemically incorporated fluorinated AlPO4 (AlPO4‐F) architecture that functions as a multifunctional “interfacial fortress” for Li‐rich layered oxides (LLOs). By modulating the surface potential to –32.16 mV, this architecture enriches Li+ concentration and repels detrimental electrolyte anions.
Hojun Moon, Harim Jeong, Younghwon Kim, Buseong Kim, Geunhyeong Kim, Suyeon Lee, Jeongjin Lee, Joonwoo Kim, Jemin Lee, Youngsoo Kim, Young‐Il Kim, Dae Won Cho, Jeeyoung Yoo, Misook Kang   +13 more
wiley   +1 more source

Proton Exchange Membrane Fuel Cell With Enhanced Durability Using Fluorinated Carbon As Electrocatalyst

E3S Web of Conferences, 2017
This study evaluates the fluorination of a carbon aerogel and its effects on the durability of the resulting electrocatalyst for Proton Exchange Membrane Fuel Cell (PEMFC). Fluorine has been introduced before or after platinum deposition.
Ahmad Yasser, Guérin Katia, Dubau Laetitia, Chatenet Marian, Berthon-Fabry Sandrine   +4 more
doaj   +1 more source

Synthesis of thorium tetrafluoride (ThF4) by ammonium hydrogen difluoride (NH4HF2)

Nuclear Engineering and Technology, 2019
The present study aims to investigate the fluorination of thorium oxide (ThO2) by ammonium hydrogen difluoride (NH4HF2). Fluorination was performed at room temperature by mixing ThO2 and NH4HF2 at different molar ratios, which was then left to react for ...
Che Nor Aniza Che Zainul Bahri, Aznan Fazli Ismail, Amran Ab. Majid   +2 more
doaj   +1 more source

Reaction‐Time pH Stabilization by Poly(acrylic acid) with Ethanol‐Mediated Growth Control for Efficient Hydrothermal Sb2(S,Se)3 Solar Cells

Advanced Functional Materials, EarlyView.
Poly(acrylic acid) acts as a reaction‐time pH buffer during hydrothermal Sb2(S,Se)3 growth through its COOH/COO‐ equilibrium. When combined with ethanol‐regulated growth, this buffering strategy reduces Sb‐O related surface disorder, improves local electronic uniformity and carrier collection, and increases the champion solar‐cell efficiency to 10.25%,
Juhee Lee, Geumha Lim, Wookyung Jeon, Seongju Park, Jinwoo Chu, Yohan Yoon, William Jo, Byungha Shin   +7 more
wiley   +1 more source

Elemental fluorine as a valid synthetic reagent [PDF]

, 1994
Chapter I Chapter I reviews the uses of elemental fluorine in selective organic synthesis and its use in the generation of selective electrophilic fluorinating agents.
Skinner, Christopher John
core  

Hydrophilic Polymers Enable Gastrointestinal Transit Monitoring by Fluorine‐19 Magnetic Resonance Imaging

Advanced Healthcare Materials, EarlyView.
Hydrophilic fluorinated copolymers dissolve in chyme and give a strong, single 19F signal, unlike phase‐separating perfluorocarbons. Combined 1H‐19F MRI tracks their whole‐gut transit non‐invasively and without ionizing radiation. In rats, the tracers move through the gastrointestinal tract, resist resorption, and are well tolerated, a proof‐of‐concept
Ondřej Groborz, Vít Herynek, Mária Hovořáková, Zuzana Pavlíková, Linda Dalecká, Klára Steklíková, Petr Matouš, Petr Páral, Margarita Tkachenko, Filip Koucký, Fatma Nalan Cetin, Ludmila Maffei Svobodová, Jiří Beneš, Kristýna Kolouchová   +13 more
wiley   +1 more source

Elemental fluorination : the synthesis of fluorinated polymers, organometallics and organic molecules

, 2002
textLiquid-Phase elemental fluorination has been utilized for the synthesis of a wide range of functionalized perfluoropolyethers, functionalized perfluoropentafluoro sulfanyl (SF5) and tetrasulfanyl (SF4) compounds, perfluoronitro compounds ...
Youngstrom, Cameron Royal
core  

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Design and Experimental Investigation of Fluoride Volatility Fluidized Bed Reactor

Yuanzineng kexue jishu
China’s nuclear energy development is implemented through a three-step strategy of pressurized water reactor-fast reactor-fusion reactor, accompanied by closed nuclear fuel cycle technology.
ZHANG Lixin, ZHU Yingxi, YUAN Zhiliang, WU Yingjie, ZHANG Shengwei, WANG Wenhui, YANG Tinggui
doaj   +1 more source