Results 101 to 110 of about 77,925 (335)

The structure of a tetrameric α-carbonic anhydrase fromThermovibrio ammonificansreveals a core formed around intermolecular disulfides that contribute to its thermostability [PDF]

, 2014
Carbonic anhydrase enzymes catalyse the reversible hydration of carbon dioxide to bicarbonate. A thermophilic Thermovibrio ammonificans α-carbonic anhydrase (TaCA) has been expressed in Escherichia coli and structurally and biochemically characterized ...
Berg, Svein, Isupov, Michail N., James, Paul, Kotlar, Hans Kristian, Lioliou, Maria, Littlechild, Jennifer A., Saneei, Vahid, Sayer, Christopher   +7 more
core   +1 more source

pH‐Directed Capture‐SELEX for Nanomolar Affinity Aptamers for Kanamycin Detection

Analysis &Sensing, Volume 5, Issue 3, May 2025.
Considering the four pKa values of kanamycin A being all close to 7, two parallel SELEX experiments were carried out at pH 6 and 8. The pH 6 selection yielded a kanamycin aptamer with nanomolar affinity, which was used for fluorescent biosensor development.
Yichen Zhao, Juewen Liu
wiley   +1 more source

Investigation of Some Antibiotic Residue Levels in Honey Produced in Ardahan Province

ISPEC Journal of Agricultural Sciences
Beekeeping has been a major agricultural activity since ancient times. The importance of beekeeping is still present in our country, just like in other parts of the world.
Ertan DOĞAN
doaj   +1 more source

Synthesis and Antibacterial Evaluation of Novel Heterocyclic Compounds Containing a Sulfonamido Moiety

Molecules, 2013
Aiming for the synthesis of new heterocyclic compounds containing a sulfonamido moiety suitable for use as antibacterial agents, the precursor ethyl {[4-N-(4,6-dimethylpyrimidin-2-yl)sulfamoyl]phenylazo}cyanoacetate was reacted with a variety of active ...
Eman A. El-Bordany, Mohamed M. Youssef, Mohammad Emad Azab   +2 more
doaj   +1 more source

Behavior of Polyamide Brackish Water Reverse Osmosis Membranes in Acidic NaOCl Environment

Journal of Applied Polymer Science, Volume 142, Issue 22, June 10, 2025.
The study investigates the effect of chlorination by NaOCl in acidic pH on RO membranes. A sudden drop in the pure water flux is observed post‐chlorine exposure, along with increased crystallinity of the polyamide layer; the flux increases after salt passage. This is attributed to conformational changes at low chlorine concentrations.
Srija Madduri, Hemant S. Sodaye, A. K. Debnath, A. K. Adak, T. L. Prasad   +4 more
wiley   +1 more source

Photoelectrocatalytic Coupling of Chlorine Radicals Enhances Sulfonamide Antibiotic Degradation in Saline-Alkaline Waters in Cold-Water Fish Aquaculture

Fishes
The degradation of organic matter using TiO2 nanotube photocatalytic technology is limited by the short lifetime and diffusion radius of the generated hydroxyl radicals, decreasing the removal efficiency.
Qikai Liu, Yang Liu, Yaqi Mao, Ru Li, Yujie Jiao, Jiali Lei, Fenzhen Zhang   +6 more
doaj   +1 more source

New Heteroleptic Ruthenium(II) Complexes with Sulfamethoxypyridazine and Diimines as Potential Antitumor Agents

Molecules, 2019
Two new complexes of Ru(II) with mixed ligands were prepared: [Ru(bpy)2smp](PF6) (1) and [Ru(phen)2smp](PF6) (2), in which smp = sulfamethoxypyridazine; bpy = 2,2′-bipyridine; phen = 1,10-phenanthroline.
Ariane C.C. de Melo, Jaime M.S.V.P. Santana, Kelen J.R.C. Nunes, Bernardo L. Rodrigues, Nathalia Castilho, Philipe Gabriel, Adolfo H. Moraes, Mayra de A. Marques, Guilherme A.P. de Oliveira, Ívina P. de Souza, Hernán Terenzi, Elene C. Pereira-Maia   +11 more
doaj   +1 more source

Vulcanization Temperature Impact on Cross‐Linking Density and Compression Set of Sulfur‐Cured Ethylene–Propylene–Diene Monomer

Journal of Applied Polymer Science, EarlyView.
ABSTRACT The aim of the research was to find a fast and reliable measurement method for the prediction of functional properties such as compression set (CS) of rubber profiles. Research shows that the best method for testing network density and crosslinks structure for a finished product, such as complex car seals, is equilibrium swelling. Measurements
Krzysztof Kaczewiak, Piotr Głąb, Magdalena Maciejewska   +2 more
wiley   +1 more source

Design, synthesis, in vitro anticancer evaluation, kinase inhibitory effects, and pharmacokinetic profile of new 1,3,4-triarylpyrazole derivatives possessing terminal sulfonamide moiety

Journal of Enzyme Inhibition and Medicinal Chemistry, 2019
The present work describes the design and synthesis of a novel series of 1,3-diaryl-4-sulfonamidoarylpyrazole derivatives 1a–q and 2a–q and their in vitro biological activities.
Mohammed S. Abdel-Maksoud, Mohammed I. El-Gamal, Mahmoud M. Gamal El-Din, Chang Hyun Oh   +3 more
doaj   +1 more source

Perfluoroalkanesulfonamide Organocatalysts for Asymmetric Conjugate Additions of Branched Aldehydes to Vinyl Sulfones

Molecules, 2013
Asymmetric conjugate additions of branched aldehydes to vinyl sulfones promoted by sulfonamide organocatalyst 6 or 7 have been developed, allowing facile synthesis of the corresponding adducts with all-carbon quaternary stereocenters in excellent yields ...
Kosuke Nakashima, Miho Murahashi, Hiroki Yuasa, Mariko Ina, Norihiro Tada, Akichika Itoh, Shin-ichi Hirashima, Yuji Koseki, Tsuyoshi Miura   +8 more
doaj   +1 more source