Results 41 to 50 of about 990,772 (304)

Valorization of Lignin by Partial Wet Oxidation Using Sustainable Heteropoly Acid Catalysts

Molecules, 2017
The production of carboxylic acids by partial wet oxidation of alkali lignin at elevated temperatures and pressures was studied experimentally. Two different heteropoly acids, phosphotungstic acid (H3PW12O40) and phosphomolybdic acid (H3PMo12O40), were ...
Abayneh Getachew Demesa, Arto Laari, Mika Sillanpää, Tuomas Koiranen   +3 more
doaj   +1 more source

Investigating the partitioning of anionic carboxylic acids through data analysis and experimental procedures

, 2023
Di Toro, Dominic M.Polyfluoroalkyl Substances, known as PFAS, are a class of manufactured surfactants. Since the toxicity of the anionic forms of these compounds are difficult to study, carboxylic acids can be used as surrogate compounds.
Johnston, Lindsay
core   +1 more source

Visible Light–Induced Decarboxylative Radical Addition of Heteroaromatic Carboxylic Acids to Alkenes at Room Temperature in Two‐Molecule Photoredox System

ChemistryOpen
The photoinduced decarboxylative radical addition of aryl carboxylic acids, including heteroaromatic carboxylic acids, to electron‐deficient alkenes is achieved in a two‐molecule photoredox system using a combination of biphenyl (BP) and 9,10 ...
Daisuke Suzuki, Ryoga Hashimoto, Toshiki Furutani, Mugen Yamawaki, Hirotsugu Suzuki, Yasuharu Yoshimi   +5 more
doaj   +1 more source

Understanding biocatalyst inhibition by carboxylic acids

Frontiers in Microbiology, 2013
Carboxylic acids are an attractive biorenewable chemical in terms of their flexibility and usage as precursors for a variety of industrial chemicals.
Laura R Jarboe, Laura R Jarboe, Liam A. Royce, Ping eLiu   +3 more
doaj   +1 more source

Synthesis and Characterization of Some New Coumarin Derivatives as Probable Breast Anticancer MCF-7 Drugs

Crystals, 2021
This study aimed to synthesize quinolinone derivatives and investigate their cytotoxic activity. The compound 1-azacoumarin-3-carboxylic acid (2-oxo-1H-quinoline-3-carboxylic acid) was obtained via the cyclocondensation of 2-hydroxybenzaldehyde with ...
Ahmed Gaber, Walaa F. Alsanie, Majid Alhomrani, Abdulhakeem S. Alamri, Ibrahim M. El-Deen, Moamen S. Refat   +5 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Titanium Tetrachloride-Assisted Direct Esterification of Carboxylic Acids

Molecules
Ester compounds, widely found in pharmaceutical and natural products, play a crucial role in organic synthesis, prompting the development of numerous methods for their synthesis. An important chemical approach in synthesizing esters from carboxylic acids
Palmira Alessia Cavallaro, Marzia De Santo, Marianna Greco, Rocco Marinaro, Emilia Lucia Belsito, Angelo Liguori, Antonella Leggio   +6 more
doaj   +1 more source

Esterification of Carboxylic Acids utilizing Eosin Y as a Photoacid Catalyst [PDF]

Esters represent a vital functional group in organic chemistry and are prominently featured in valuable molecules. Traditional approaches for ester synthesis from acids typically entail the use of strong acids and toxic activating agents.
Jaya, Tripathi, Harshita , Gupta, Anuj, Sharma   +2 more
core   +2 more sources

Discerning protein pools by selective staining with self‐labeling tags

FEBS Letters, EarlyView.
Cell surface proteins have an intra‐ and extracellular pool. Combining genetic fusion to self‐labeling tags that can be addressed with small molecule fluorophores allows separating these pools. We highlight recent developments and techniques for state‐of‐the‐art interrogation of cell surface proteins in the complex tissue setting.
Kati Fischermanns, Johannes Broichhagen
wiley   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source