Results 61 to 70 of about 7,497 (214)

Herbicidal action of 2-hydroxy-3-alkyl-1,4-naphthoquinones

, 2002
The main mode of herbicidal activity of 2-hydroxy-3-alkyl-1,4-naphthoquinones is shown to be inhibition of photosystem II (PSII). The herbicidal and in vitro activities have been measured and correlated with their (Log)octanol/water partition ...
Moss, S. R., Berry, K. J., Boogaard, A. B., Khambay, B. P. S., Jewess, P. J., Higgins, J., Boogard, A. B.   +6 more
core   +1 more source

Synthesis of Acylated Naphthohydroquinones Through Photo-Friedel–Crafts Acylation and Evaluation of Their Antibiotic Potential

Photochem
A variety of 1-(1,4-dihydroxynaphtalen-2-yl) ketones was synthesized using the photo-Friedel–Crafts acylation of 1,4-naphthoquinone with aldehydes. Subsequent oxidation using silver oxide readily furnished the corresponding 2-acylated 1,4 naphthoquinones.
Alexis Mercier, Alizée Monet, Madyan A. Yaseen, M. Iris Hermanns, Michael Oelgemöller   +4 more
doaj   +1 more source

Traditional Uses, Phytochemistry, and Multi‐Target Pharmacological Activities of Senna alexandrina

Chemistry &Biodiversity, Volume 23, Issue 10, October 2026.
Senna alexandrina is a medicinally important plant with documented use across Traditional Chinese, Islamic, Ayurvedic, and Unani medicine systems. Phytochemical investigations have yielded 219 characterized compounds, predominantly anthraquinones, flavonoids, and polysaccharides, distributed across leaves, pods, and aerial parts.
Diana Afrina Rella, Khai‐Lin Hew, Yeun‐Mun Choo   +2 more
wiley   +1 more source

Iron(III)‐loaded cation exchange resin: A dual approach for aqueous H2S removal and biogas desulphurization

The Canadian Journal of Chemical Engineering, Volume 104, Issue 10, Page 5397-5408, October 2026.
Left: Desulphurization method application. Right: Novel desulphurization method. Abstract The presence of hydrogen sulphide (H2S) in biogas poses significant environmental and operational challenges due to its corrosive and toxic properties. Thus, this study aimed to develop a dual‐function desulphurization system using a cation exchange resin (CIER ...
Matheus Damásio Thrun, Renata Mello Giona, Eduardo Eyng, Eduardo Borges Lied, Laércio Mantovani Frare, Ismael Laurindo Costa Junior, Ilton José Baraldi   +6 more
wiley   +1 more source

Crystal structure of 2-hydroxy-3-(prop-2-yn-1-yl)naphthalene-1,4-dione

Acta Crystallographica Section E: Crystallographic Communications, 2018
The naphthoquinone unit of the title compound, C13H8O3, is essentially planar, with an r.m.s. deviation of 0.013 Å for the non-H atoms. The essentially linear propargyl group is tilted by ca 113° relative to the naphthoquinone plane.
Isidório Raquel Geralda, Ottoni Flaviano Melo, Alves Ricardo José, Speziali Nivaldo Lúcio   +3 more
doaj   +1 more source

Synthesis and Characterization of Juglone‐Derived cu (II), Mn (II) and Zn (II) Complexes and Investigation of Their Cytotoxic Activities Against Lung and Colon Cancer Cells in Vitro and in Silico

Journal of Applied Toxicology, Volume 46, Issue 10, Page 3465-3477, October 2026.
ABSTRACT Three new Zn (II), Cu (II) and Mn (II) complexes have been synthesized from 5‐hydroxy‐1,4‐naphthoquinone (HNQ). Elemental analysis, magnetic susceptibility, UV–Vis, IR and Mass spectrometry have all been used to explore the structural characterization of these compounds.
Mustafa Öztatlıcı, Turan Birimoğlu, Semih Güler, Rukiye Betül Çolaksel, Mehmet Tahir Husunet, Mehmet Sönmez   +5 more
wiley   +1 more source

A new route to naphtho[2,3-b]furan-4,9-diones from thio-substituted 1,4-naphthoquinones [PDF]

, 1990
Reaction of 2-phenylthio- or 2-ethylthio-1,4-naphthoquinones (1) and (2) with lithium enolates or pyridinium ylides was found to give alkylated 1,4-naphthoquinones (3)-(6) in high yields.
Toru, Takeshi, Sekiya, Takashi, Kang, Wen Bing, Ueno, Yoshio   +3 more
core   +2 more sources

Biosynthesis of food constituents: Natural pigments: Part 1

Czech Journal of Food Sciences, 2007
This review article gives a survey of the generally accepted biosynthetic pathways that lead to the most important natural pigments in organisms closely related to foods and feeds.
Jan Velíšek, Jiří Davídek, Karel Cejpek   +2 more
doaj   +1 more source

Electroactive Microbiomes: Electron Transfer Mechanisms and Environmental Biotechnology Applications

Environmental Microbiology Reports, Volume 18, Issue 5, October 2026.
Electroactive microbiomes couple direct, mediated, conductive, and interspecies electron transfer with biofilm organisation to drive wastewater treatment, bioremediation, resource recovery, carbon conversion, and biosensing. Their performance depends on balancing electron transfer, mass transport, community structure, and electrode–biofilm interactions
Timoth Mkilima
wiley   +1 more source

Dano ao DNA, citotoxicidade, efeito antiproliferativo e antitumoral de 1,4-naftoquinonas substituídas [PDF]

, 2014
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Bioquímica, Florianópolis, 2014.As quinonas são uma classe de substâncias químicas de interesse na terapêutica do câncer, visto que ...
Farias, Mirelle Sifroni
core