Results 151 to 160 of about 4,491 (261)

Antiviral activity of the aqueous extract of twelve monthly-collections of propolis from Barra do Corda. [PDF]

Sci Rep
Mendonça RZ, Braida YV, Fernandes AC, Nascimento RM, Salatino A, Salatino MLF, Negri G.   +6 more
europepmc   +1 more source

Electronic Smoking Devices Among University Students: Usage Patterns and Chemical Composition of Inhaled Substances

Analytical Science Advances, Volume 7, Issue 1, June 2026.
ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela, Raffael Silva Santos Almeida, Ivana Ferreira Simões, Aline Gonçalves Miranda, Magno Oliveira Ramos, Roberto Rodrigues Bandeira Tosta Maciel, Fernanda Warken Rosa, Aníbal de Freitas Santos Júnior   +7 more
wiley   +1 more source

Peptide modification <i>via</i> a mild carbonylative Suzuki-Miyaura reaction gives late-stage access to diaryl-ketones. [PDF]

Chem Sci
Kleppen JP, Scott NWJ, Phillips TJ, Stankevich KS, Donald JR, Barber LJ, Lewis KM, Fairlamb IJS, Spicer CD.   +8 more
europepmc   +1 more source

Redox‐Neutral and Diastereoselective Cross‐Pinacol Coupling of Pyridyl Ketones With Amine‐Derived Aldehydes

ChemistryEurope, Volume 4, Issue 6, June 2026.
A redox‐neutral strategy enables cross‐selective pinacol coupling between pyridyl ketones and amine‐derived aldehydes using a samarium catalyst and visible‐light antenna ligand, affording the desired cross‐coupling products in high yields with excellent diastereoselectivity.
Takahito Kuribara, Katsuma Ando, Ayahito Kaneki, Tetsuhiro Nemoto   +3 more
wiley   +1 more source

Association of exposure to synthetic phenols and metal(loid)s with early puberty in Spanish girls: a multicentric case-control study. [PDF]

Eur J Pediatr
Olivas-Martinez A, Escribano A, Riaño-Galán I, Torrebias M, Olmedo P, Gil F, Suarez B, Rodríguez-Carrillo A, Corripio R, Castiello F, Bosch MZ, Herrero X, Ventura-Wichner PS, Freire C.   +13 more
europepmc   +1 more source

Functionalizing Nucleobases With Boronic Acids and Boronic Acid Esters: Thymine Derivatives and Their Dioxazaborocane Chemistry

ChemPlusChem, Volume 91, Issue 6, June 2026.
Boronic acid‐substituted thymine derivatives are well established and exhibit a range of biological activities. In contrast, the corresponding boronic acid esters and dioxazaborocane analogs remain largely unexplored. Herein, we report the synthesis and structural characterization of thymine derivatives bearing boronic acid, boronic acid ester, and ...
Tabea Lenz, Marcus Layh, Marian Hebenbrock   +2 more
wiley   +1 more source

Light‐Driven [2 + 2] Cycloaddition Strategies for the Synthesis of Cyclobuta[b]indoles and Their Derivatives

ChemPhotoChem, Volume 10, Issue 6, June 2026.
This review surveys the literature on light‐driven dearomative [2+2] cycloadditions of indoles, highlighting their power to access complex cyclobuta[b]indole frameworks. Advances in photocatalysis, sensitizer design, and reaction engineering enable selective and sustainable assembly of strained three‐dimensional architectures, expanding opportunities ...
Maria Chiara Cabua, Davide Moi, Alberto Luridiana, Francesco Secci, Emanuele Cocco   +4 more
wiley   +1 more source

Halogen‐Bonding‐Induced Direct SET Activation of Aryl Iodides: Inorganic Bases as Self‐Sufficient Electron Donors

ChemPhotoChem, Volume 10, Issue 6, June 2026.
Simple inorganic bases emerge as potent photo‐reductants via halogen bonding without any exogenous organic additives. The formation of a discrete charge–transfer complex between aryl iodides and ubiquitous inorganic bases enables direct single‐electron transfer under mild LED irradiation, facilitating efficient access to aryl boronic esters, stannanes,
Kentaro Kimura, Eiji Yamaguchi, Akichika Itoh   +2 more
wiley   +1 more source

Recent Advances in Bioinspired Cu-Directed C-H Hydroxylation Reactions. [PDF]

Acc Chem Res
Goswami S, Garcia-Bosch I.
europepmc   +1 more source

Sonochemical degradation of triclosan, benzophenone-1 and benzophenone -3 in Water

, 2019
RESUMEN: Degradation of triclosan, benzophenone 1, and benzophenone 3 by multifrequency ultrasound was studied at high frequencies. Frequency effect on initial degradation rates was analyzed and an optimum frequency was found. Power density effect was also analyzed. A reaction mechanism was proposed and reaction kinetics were found.
openaire   +1 more source