Results 41 to 50 of about 59,806 (250)

A generalized approach for the calculation and automation of potentiometric titrations Part 2. Redox Titrations [PDF]

, 1984
The very fast calculation procedure described earlier is applied to calculate the titration curves of complicated redox systems. The theory is extended slightly to cover inhomogeneous redox systems.
Bos, M., Linden, W.E. van der, Stur, J.
core   +8 more sources

Kolbe Electrolysis for the Conversion of Carboxylic Acids to Valuable Products—A Process Design Study

Clean Technologies, 2021
The substitution of fossil resources by renewable alternatives is a major challenge for our society. Kolbe electrolysis converts carboxylic acids to hydrocarbons, which can be used as base chemicals, specialty chemicals, or fuels. Carboxylic acids may be
Daniel Klüh, Wolfgang Waldmüller, Matthias Gaderer   +2 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

The Difference of the Complex Formation of the Samarium (3+) Ion with the L-malic Acid as Compared to the Neodymium (3+) Ion

Eurasian Chemico-Technological Journal, 2004
The complex formation of the neodymium Nd3+ ion and the samarium Sm3+ ion with L-malic acid (H3Mal) in the aqueous solutions was studied by pH-metric titration in pH region 2.80 to 10.00 and constant ionic strength 0.1 M KCl at 25 °C.
Vladimir Yu. Buzko, Igor V. Sukhno, Margarita B. Gavriluyk, Victor T. Panyushkin   +3 more
doaj   +1 more source

A minimalist chemical model of matrix metalloproteinases- Can small peptides mimic the more rigid metal binding sites of proteins? [PDF]

, 2013
In order to develop a minimalist chemical model of matrix metalloproteinases (MMPs), we synthesized a pentadecapeptide (Ac-KAHEFGHSLGLDHSK-NH2) corresponding to the catalytic zinc(II) binding site of human MMP-13.
Aguilar, Attila Jancsó, Beck, Burns, Camerman, Daignault, Dávid Árus, Farkas, Farkas, Gajda, Grossoehme, Harford, Heitzer, Högfeldt, Jancsó, Jancsó, Kaiser, Khairy, Kimura, Koike, Kolozsi, Kállay, Massova, Millhauser, Mylonas, Mylonas, Nóra Veronika Nagy, Paksi, Rabenstein, Rajkovic, Rockenbauer, Rosotti, Róbert Berkecz, Stanczak, Sternlicht, Sóvágó, Tallant, Tamás Gajda, Valensin, Valensin, Valensin, Verma, Witkowska, Zastrow, Zoroddu, Zékány, Ágnes Dancs, Árus, Ősz   +48 more
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

3D Interaction Homology: Computational Titration of Aspartic Acid, Glutamic Acid and Histidine Can Create pH-Tunable Hydropathic Environment Maps

Frontiers in Molecular Biosciences, 2021
Aspartic acid, glutamic acid and histidine are ionizable residues occupying various protein environments and perform many different functions in structures. Their roles are tied to their acid/base equilibria, solvent exposure, and backbone conformations.
Noah B. Herrington, Glen E. Kellogg, Glen E. Kellogg   +2 more
doaj   +1 more source

Absorber design in sour natural gas treatment plants: Impact of process variables on operation and economics = Absorberentwurf für Anlagen zur Behandlung von sauren Erdgasen: Einfluss Prozessparameter auf Betriebsführung und Prozesswirtschaftlichkeit [PDF]

, 1985
Two models of absorber have been developed which describe the absorption of H2S and CO2 from natural gases by aqueous di-isopropanolamine (DIPA) or methyl-di-ethanolamine (MDEA) solutions. In these models mass transfer, reaction and equilibrium processes
Blauwhoff, P.M.M., Kamphuis, B., Swaaij, W.P.M. van, Westerterp, K.R.   +3 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Protolytic Equilibria of Cetirizine in the Presence of Micelle-Forming Surfactants

Organics
The acid–base equilibria of cetirizine were investigated with and without the presence of differently charged micelle-forming surfactants (anionic, cationic, nonionic).
Marija Popović-Nikolić, Gordana Popović, Slavica Oljačić, Katarina Nikolić   +3 more
doaj   +1 more source