Results 71 to 80 of about 44,043 (291)

Neue Versuche mit Spiropyran: Photometrie, NMR‐Spektroskopie und On‐Water‐Synthese

CHEMKON, EarlyView.
Reaktionskinetik wird häufig als schwierig, theoretisch und Mathematik‐lastig empfunden, weshalb experimentelle Zugänge für diesem Themenbereich notwendig sind. In diesem Beitrag werden entsprechende Versuche zur Reaktionskinetik vorgestellt, bei denen das Farbstoffsystem eines Spiropyrans und dessen isomerer Merocyanin‐Form untersucht wird.
Marcel Emmert, Jordan Karg, Katja Flora Weirauch   +2 more
wiley   +1 more source

Synthesis, Anti-Inflammatory, and Molecular Docking Studies of New Heterocyclic Derivatives Comprising Pyrazole, Pyridine, and/or Pyran Moieties

Pharmaceuticals
Introduction: Inhibiting cyclooxygenase-2 (COX-2) is a potential strategy in inflammation therapy. Thus, developing COX-2 inhibitors plays a pivotal role in efficient inflammation treatment.
Mohamed A. M. Abdel Reheim, Hend S. Abdel Rady, Omnia A. Mohamed, Abdelfattah Hassan, Ibrahim S. Abdel Hafiz, Hala M. Reffat, Fahmy Gad Elsaid, Mamdouh Eldesoqui, Dalal Sulaiman Alshaya, Abdelnaser A. Badawy, Eman Fayad, Aboubakr H. Abdelmonsef   +11 more
doaj   +1 more source

Identification of Active Compounds From Yi Nationality Herbal Formula Wosi Influencing COX-2 and VCAM-1 Signaling

Frontiers in Pharmacology, 2020
The Yi nationality herbal formula Wosi is used in China as a folk medicine to treat arthritis and related diseases. Despite its widespread use, the active ingredients, and pharmacological mechanisms are not performed.
Ji-Zhong Zhang, Ji-Zhong Zhang, Xiao-Yi Chen, You-Jiao Wu, Li-Min Li, Li Huang, Qiao-Zhi Yin, Pei Luo, Yuan Liu, Yuan Liu   +9 more
doaj   +1 more source

Synthesis and biodistribution of immunoconjugates of a human IgM and polymeric drug carriers [PDF]

, 1992
The synthesis and purification of radiolabelled immunoconjugates, composed of a human IgM monoclonal antibody directed against an intracellular tumour-associated antigen and either poly (alpha-L-glutamic acid) (PGA) or poly[N5-(2-hydroxyethyl)-L ...
Anderson, James M., Boon, P.J., Bos, E.S., Feijen, J., Grootoonk, J., Hoes, C.J.T., Kaspersen, F., Loeffen, P., Schlachter, I., Winters, M.   +9 more
core   +2 more sources

Electrospun Biomass‐Derived Flexible Anodes With Hierarchical Structure via Cobalt MOF Integration for Sodium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Hierarchically porous, N‐doped freestanding anode enables reversible Na+ insertion/desorption and Na–Co alloying, delivering fast kinetics, structural robustness, and durable sodium‐storage performance even under bending/folding. To develop a green, sustainable, and high‐performance anode for sodium‐ion batteries (SIBs), flexible biomass‐based carbon ...
Yuqiong He, Shengping Hou, Jie Liu, Shengbo Ge, Siqun Wang, Mashallah Rezakazemi, Feng Liang, Guanben Du, Kaimeng Xu   +8 more
wiley   +1 more source

Chemistry of Pyrones, Part 3: New Podands of 4H-Pyran-4-ones

Molecules, 2000
New derivatives of 3,5-disubstituted 4H-Pyran-4-one podands (9-15) were prepared by transesterification reaction of dimethyl or diethyl 2,6-dimethyl-4H-pyran-4-one-3,5-dicarboxylate with some glycol, glycol ethers or by nucleophilic substitution of some ...
Aziz Shahrisa, Alireza Banaei
doaj   +1 more source

Degradation of connective tissue matrices by macrophages. III. Morphological and biochemical studies on extracellular, pericellular, and intracellular events in matrix proteolysis by macrophages in culture. [PDF]

, 1980
We have shown that macrophages in culture degrade the glycoproteins and amorphous elastin of insoluble extracellular matrices. Ultrastructural observation of the macrophage-matrix interaction revealed that connective tissue macromolecules were ...
Bainton, DF, Jones, PA, Werb, Z
core  

Synthesis and antibacterial activities of enamine derivatives of dehydroacetic acid [PDF]

, 2017
Dehydroacetic acid is a common pyrone derivative used commercially as an antibacterial and antifungal agent. Based on the synthesis of dehydroacetic acid (1) from N-hydroxysuccinimdyl acetoacetate, a novel series of enamine-based derivatives were ...
Baldwin, Alex, Bevan, Jonathan, Brough, David, Freeman, Sally, Ledder, Ruth   +4 more
core   +2 more sources

Synthesis of Polyfunctionalized 4H‐Pyrans [PDF]

Journal of Chemistry, 2012
Amberlyst A21 catalyzed one‐pot three‐component coupling of aldehyde and malononitrile with active methylene compounds such as acetylacetone and ethyl acetoacetate for the synthesis of pharmaceutically important polyfunctionalized 4H‐pyrans has been reported. Simple experimental procedure, no chromatographic purification, no hazardous organic solvents,
Manisha Bihani, Pranjal P. Bora, Ghanashyam Bez   +2 more
openaire   +2 more sources

Metal‐Free and Solvent‐Free CO2 Fixation Into Cyclic Carbonates Catalyzed by a Deferiprone‐Derived Bifunctional System

European Journal of Organic Chemistry, EarlyView.
A simple bifunctional organocatalyst derived from the FDA‐approved chelator deferiprone efficiently promotes CO2 fixation into cyclic carbonates. By combining epoxide activation and nucleophilic ring opening in a single scaffold, quantitative conversions are achieved under mild, metal‐free conditions. High activity, broad substrate scope, and excellent
Erika Saccullo, Luca Calantropo, Roberto Fiorenza, Pietro Nicotra, Antonio Rescifina, Vincenzo Patamia, Giuseppe Floresta   +6 more
wiley   +1 more source