Results 41 to 50 of about 2,614 (189)

Efficacy and safety of methylene blue in the treatment of malaria: a systematic review [PDF]

open access: yes, 2018
Background: Methylene blue (MB) was the first synthetic antimalarial to be discovered and was used during the late 19th and early 20th centuries against all types of malaria.
Goldau, N.   +7 more
core   +1 more source

Europium‐Modified Urea‐Assisted TiO2 Nanoparticles as Multifunctional Materials for Natural Sunlight‐Driven Photocatalysis, Antimicrobial Defense, and Anticancer Activity

open access: yesChemCatChem, Volume 18, Issue 7, 14 April 2026.
This work reports, for the first time, the synergistic integration of urea‐assisted surface engineering and europium ion doping in TiO2 to achieve efficient sunlight‐driven degradation of structurally diverse azo and non‐azo dyes, coupled with enhanced antibacterial activity, supported by mechanistic validation through scavenger and GC–MS analyses ...
N. Lakshman Kumar   +9 more
wiley   +1 more source

Observations sur la glande pylorique des Thaliacés [PDF]

open access: yes, 1954
La glande pylorique du Pyrosome et du Doliolum est capable de concentrer dans sa lumière une série de colorants ...
Godeaux, J.E.A.
core  

Copper‐ and Silver‐Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five‐ and Six‐Membered Heterocycles

open access: yesChemistry – A European Journal, Volume 32, Issue 13, 1 April 2026.
This review summarizes recent advances in copper‐ and silver‐catalyzed reactions of active methylene isocyanides for the synthesis of highly substituted five‐ and six‐membered heterocycles. Emphasis is placed on [3+n] cycloadditions, annulations, and asymmetric strategies, highlighting current limitations and future opportunities in heterocycle ...
Jimil George, Kyungsoo Oh
wiley   +1 more source

Tetrahydro-1,4-thiazine-3,5-dione [PDF]

open access: yesMolbank, 2018
The X-ray structure of the title compound contains eight molecules in the unit cell which form the basis of a herringbone arrangement of hydrogen bonded ribbons.
R. Aitken, Alexandra Slawin, Pei-pei Yeh
openaire   +4 more sources

Solvothermal Fabrication of Trimetallic Oxides NCs: Exploring Their Magnetic and Photocatalytic Characteristics

open access: yesNano Select, Volume 7, Issue 4, April 2026.
A trimetallic NiFe2O4/ZnO/Co3O4 nanocomposite is synthesized via a solvothermal route and thermally tuned by post‐annealing. Structural, optical, and magnetic properties evolve systematically with temperature, enabling efficient sunlight‐driven degradation of mixed organic dyes.
Muhammad Hassan Iqbal   +5 more
wiley   +1 more source

Identification and characterization of antibacterial compound(s) of cockroaches (Periplaneta americana) [PDF]

open access: yes, 2017
Infectious diseases remain a significant threat to human health, contributing to more than 17 million deaths, annually. With the worsening trends of drug resistance, there is a need for newer and more powerful antimicrobial agents.
A Brüning   +215 more
core   +1 more source

5,6-Dihydro-2H-pyran-3(4H)-on als Baustein zur Synthese pyrananellierter Heterocyclen [PDF]

open access: yes, 1984
Während 5,6-Dihydro-2H-pyran-3(4H)-on (3) sich mit ortho-substituierten Phenylcarbonylverbindungen nur in Einzelfällen regioselektiv zu pyrananellierten Heterocyclen umsetzt - z. B.
Eiden, Fritz, Wanner, Klaus Th.
core   +1 more source

Synthesis of Polysubstituted Tetrahydro‐1,4‐Thiazepines by Rhodium‐Catalyzed Ring Expansion of Dihydro‐1,3‐Thiazines with Diazoesters

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 2, January 2026.
A rhodium(II)‐catalyzed ring expansion of stereodefined dihydro‐1,3‐thiazines with diazomalonates gives 1,4‐thiazepines via a sulfonium ylide rearrangement. The reaction shows a cis/trans reactivity divergence arising from different metal coordination, as revealed by experiments and density functional theory studies.
Laurine Tual   +3 more
wiley   +1 more source

Quartzite Waste–Based Composite: An Environmental and Renewable Material for the Adsorptive Removal of Industrial Dyes

open access: yesAdvances in Materials Science and Engineering, Volume 2026, Issue 1, 2026.
A carbon‐supported quartzite powder waste composite was evaluated as a sustainable and low‐cost adsorbent for the removal of the cationic dye Methylene Blue (MB) and the anionic dye Reactive Black 5 (RB5). The valorization of quartzite waste as a silica source represents an environmentally attractive strategy to mitigate disposal impacts while enabling
Lucas Destefani Paquini   +7 more
wiley   +1 more source

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