Results 71 to 80 of about 3,594 (226)
Application of Lanthanide Shift Reagent to the 1H-NMR Assignments of Acridone Alkaloids
Molecules, 2020 This study investigates the application of the paramagnetic shift reagent tris(dipivaloylmethanato)-europium(III) in NMR spectral studies of permethoxyacridone alkaloids (1–3) and pyranoacridone alkaloids (4–6).
Sio-Hong Lam +5 more
doaj +1 more source
Environmental Toxicology, EarlyView.ABSTRACT Chemical pollutants pose a significant threat to marine ecosystems. Among these contaminants are trace elements and polycyclic aromatic hydrocarbons (PAH). Green turtles can be employed to evaluate the oceans' health due to their coastal habitats and exposure to multiple threats.
Camila Roberta da Silva Ribeiro +6 more
wiley +1 more source
Microbial Community Dynamics in Marine Water: Influence of Hydrocarbon Type and Exposure Time
Environmental Toxicology, EarlyView.ABSTRACT Marine environments are frequently impacted by petroleum‐derived hydrocarbons, which pose ecological risks because of their toxic, mutagenic, and carcinogenic potential. Microorganisms play a crucial role in hydrocarbon degradation, and understanding the influence of time and hydrocarbon type on microbial dynamics helps improve bioremediation ...
Karen C. F. Santaren +4 more
wiley +1 more source
Iterative Synthesis of Pentacene Derivatives with Continuous Boron–Oxygen Bonds
Angewandte Chemie, Volume 138, Issue 23, 1 June 2026.An iterative synthetic strategy enables the controlled introduction of continuous multiple B–O bonds at the zigzag edge of acenes. A simple two‐step cycle—ipso iodination and Suzuki cross‐coupling/condensation—efficiently constructs BO‐acenes ranging from naphthalene to pentacene.
Seonghwa Jeong +8 more
wiley +2 more sources
Remarkable effect of alkynyl substituents on the fluorescence properties of a BN-phenanthrene
Beilstein Journal of Organic Chemistry, 2019 A series of BN-phenanthrenes with substituents of a diverse nature have been synthesized by palladium-catalyzed cross-coupling reactions of a common chloro-substituted precursor, which was made from readily available materials in only four steps ...
Alberto Abengózar +3 more
doaj +1 more source
Environmental Toxicology, EarlyView.ABSTRACT This study evaluated the toxic effects of water‐accommodated fractions (WAFs) of very‐low sulfur fuel oil (VLSFO) on freshwater and marine fish embryos. Embryos of Japanese medaka (Oryzias latipes), Java medaka (Oryzias javanicus), and grass puffer (Takifugu alboplumbeus) were exposed to various concentrations of VLSFO‐WAF, and the effects on ...
Jumpei Matsuo +5 more
wiley +1 more source
Integrative Zoology, EarlyView.The increase in salinity leads to changes in the gut microbiota and metabolites of Trachemys scripta elegans, affecting the synthesis and secretion of neurotransmitters or precursors, which can inhibit the secretion of reproductive hormones and affect the self‐renewal and differentiation process of spermatogonial stem cells.
Qiongyu Zhang +5 more
wiley +1 more source
Chemical Constituents from the Aerial Parts of Cyrtopodium paniculatum
Molecules, 2016 We report the first phytochemical study of the neotropical orchid Cyrtopodium paniculatum. Eight new compounds, including one phenanthrene 1, one 9,10-dihydro-phenanthrene 2, one hydroxybenzylphenanthrene 3, two biphenanthrenes 4–5, and three 9,10 ...
Florence Auberon +7 more
doaj +1 more source
Cytotoxic effect of selected wild orchids on two different human cancer cell lines
Heliyon, 2020 Majority of the orchid species are used in the traditional medicines for the treatment of several diseases. They are the sources of polysaccharides, phenanthrenes, bibenzyl derivatives, revesteral, stilbenoids and polyphenol compounds.
Pusp Raj Joshi +9 more
doaj +1 more source
, 2016 Palladium-Catalyzed Cocyclization of Arynes with Alkynes: Selective Synthesis of Phenanthrenes and ...
Diego Peña (2534845) +3 more
core +1 more source