Results 81 to 90 of about 267,561 (310)

Carboxyl groups and the proton pump of bacteriorhodopsin [PDF]

Biochemical Society Transactions, 1984
Chemical modification and spin-labeled studies of purple membranes isolated from Halobacterium halobium have provided the first evidence for buried carboxyl residues within the hydrophobic, membrane-protein domains. Spin label data showed that modification of buried carboxyl residues resulted in loss of protein activity.
Herz, J.M., Packer, L.
openaire   +3 more sources

Exploiting the Functionality of Cerium Oxide‐Modified Carbon Nanohorns Catalysts Toward Enhanced CO2 Reduction Performance

Advanced Functional Materials, EarlyView.
A cerium oxide‐carbon nanohybrid catalyst is synthesized via two distinct routes and is integrated into H‐type cells and gas diffusion layers (GDLs) to enhance electrochemical performance. Structural variations significantly affect performance, with the solvothermal sample exhibiting higher current densities.
Alessia Pollice, Michele Cacioppo, Miriam Marchi, Miriam Moro, Francesco Paolucci, Marcella Bonchio, Maurizio Prato, Giovanni Valenti, Michele Melchionna, Paolo Fornasiero   +9 more
wiley   +1 more source

(2SR,4aSR,8aSR)-6-Oxoperhydronaphthalene-2-carboxylic acid

Acta Crystallographica Section E, 2009
In the title racemic compound, C11H16O3, the molecule adopts a conformation that places its carboxyl group in an equatorial position. Molecules aggregate by hydrogen-bond pairing of carboxyl groups, yielding centrosymmetric dimers that are arranged into ...
Georgia Efthimiopoulos, Mark Davison, Roger A. Lalancette, Hugh W. Thompson   +3 more
doaj   +1 more source

Structure formation in sugar containing pectin gels – Influence of tartaric acid content (pH) and cooling rate on the gelation of high-methoxylated pectin [PDF]

, 2013
The aim of the study was the application of a recently published method, using structuring parameters calculated from dG′/dt, for the characterisation of the pectin sugar acid gelation process.
Berthold, Almuth, Drusch, Stephan, Einhorn-Stoll, Ulrike, Kastner, Hanna, Kern, Karla, Wilde, R.   +5 more
core   +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

(E)-2-(2-Fluorobenzylidene)butanoic acid

Acta Crystallographica Section E, 2008
In the crystal structure of the title compound, C11H11FO2, the methine CH forms an intramolecular hydrogen bond with the carboxyl O atom. The molecules form dimers through hydrogen bonding between carboxyl groups. These dimers are linked to each other by
Islam Ullah Khan, Saqib Ali, Zia-ur-Rehman, M. Nawaz Tahir, Muhammad Niaz   +4 more
doaj   +1 more source

A new type of Na+-driven ATP synthase membrane rotor with a two-carboxylate ion-coupling motif [PDF]

, 2013
: The anaerobic bacterium Fusobacterium nucleatum uses glutamate decarboxylation to generate a transmembrane gradient of Na+. Here, we demonstrate that this ion-motive force is directly coupled to ATP synthesis, via an F1Fo-ATP synthase with a novel Na ...
Faraldo-Gómez, José D., Iglesias-Cans, Marina, Krah, Alexander, Leone, Vanessa, M. Cook, Gregory, Matthies, Doreen, Meier, Thomas, Schulz, Sarah, Yildiz, Özkan   +8 more
core   +3 more sources

Continuous‐Flow Photocatalytic Degradation of Glyphosate and Aminomethylphosphonic Acid Under Simulated Sunlight with TiO2‐Coated Poly(vinylidene fluoride) Membrane

Advanced Functional Materials, EarlyView.
Glyphosate (GLY) and its primary metabolite, aminomethylphosphonic acid (AMPA), are photodegraded using a poly(vinylidene fluoride) membrane with immobilized titanium dioxide (PVDF‐TiO2) in a continuous flow‐through operation under solar light. At optimized conditions, the PVDF‐TiO2 membrane achieved 95% GLY and 80% AMPA removal with •O2− as the ...
Phuong B. Trinh, Siqi Liu, Nurul F. Himma, Béla Fiser, Andrea I. Schäfer   +4 more
wiley   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Impact of carboxylic acid structure on α-hemihydrate gypsum crystal morphology and mechanical strength

Frontiers in Physics
This study investigated the synthesis of α-hemihydrate gypsum (α-HH) through semi-liquid autoclaving of phosphogypsum (PG) using various carboxylic acids as modifying agents. The impact of carboxyl group spatial location, auxiliary functional group type,
Guo-gang Li, Guo-gang Li, Guo-gang Li, Jin-e Liu, Liang Ma, Hao-lei Gong, Su-hong Yin   +6 more
doaj   +1 more source