Results 31 to 40 of about 7,497 (214)

Flow Injection Analysis Coupled with Carbon Electrodes as the Tool for Analysis of Naphthoquinones with Respect to Their Content and Functions in Biological Samples

Sensors, 2006
Naphthoquinones are one of the groups of secondary metabolites widespread innature, where they mostly appear as chromatic pigments. They embody broad-range ofbiological actions from phytotoxic to fungicidal.
Rene Kizek, Miroslava Beklova, Ales Horna, Milan Zemlicka, Ladislav Havel, Jaromir Hubalek, Vojtech Adam, Sona Krizkova, Jiri Baloun, Pavel Hanustiak, Dalibor Huska, Petr Babula   +11 more
doaj   +1 more source

Three Different Dimerizations of 2-Bromo-3-methyl-1,4-naphthoquinones

, 2016
Three types of dimeric naphthoquinones, which possess structurally diverse skeletons, can be prepared in one step from 2-bromo-3-methyl-1,4-naphthoquinones.
Kazuyuki Nishio (1973524), Norihiro Tokitoh (1490197), Konomi Kubo (2082385), Kazunori Tsubaki (521423), Takahiro Sasamori (1490200), Kouji Kuramochi (222566), Shuhei Azuma (2082382)   +6 more
core   +3 more sources

Enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes catalyzed by binaphthyl-derived organocatalysts

Beilstein Journal of Organic Chemistry, 2012
The highly enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes, promoted by binaphthyl-modified chiral bifunctional organocatalysts is described.
Saet Byeol Woo, Dae Young Kim
doaj   +1 more source

Inhibition of Zika Virus Replication by Synthetic Bis-Naphthoquinones

, 2019
Zika virus (ZIKV) is a mosquito-borne pathogen which is a current global public health concern. There are currently no approved vaccines or antivirals against ZIKV infection.
Claudio C. Cirne-Santos (7233560), Norman Arthur Ratcliffe (7233557), Ana M. V. Pinto (7233554), Raissa M. A. Santos (7233551), Max W. L. Gomes (7233545), Caroline S. Barros (7233563), Davis F. Ferreira (7233548), Rafaela S. P. Gomes (7233539), Izabel Christina N. P. Paixão (7233566), Daniel T. G. Gonzaga (6666713), Fernando C. da Silva (7233542), Roberta K. F. Marra (2834942), Vitor F. Ferreira (500436)   +12 more
core   +1 more source

Is nitric oxide decrease observed with naphthoquinones in LPS stimulated RAW 264.7 macrophages a beneficial property? [PDF]

PLoS ONE, 2011
The search of new anti-inflammatory drugs has been a current preoccupation, due to the need of effective drugs, with less adverse reactions than those used nowadays.
Brígida R Pinho, Carla Sousa, Patrícia Valentão, Paula B Andrade   +3 more
doaj   +1 more source

Pro-Apoptotic Antitumoral Effect of Novel Acridine-Core Naphthoquinone Compounds against Oral Squamous Cell Carcinoma

Molecules, 2022
Oral squamous cell carcinoma (OSCC) is a global public health problem with high incidence and mortality. The chemotherapeutic agents used in the clinic, alone or in combination, usually lead to important side effects.
Bruna Costa Zorzanelli, Gabriel Ouverney, Fernanda P. Pauli, Anna Carolina Carvalho da Fonseca, Elan Cardozo Paes de Almeida, Danielle Gonçalves de Carvalho, Patricia Abrão Possik, Vitor Won-Held Rabelo, Paula Alvarez Abreu, Bruno Pontes, Vitor Francisco Ferreira, Luana da Silva Magalhães Forezi, Fernando de Carvalho da Silva, Bruno Kaufmann Robbs   +13 more
doaj   +1 more source

Shikonin and Juglone Inhibit Mycobacterium tuberculosis Low-Molecular-Weight Protein Tyrosine Phosphatase a (Mt-PTPa)

BioTech, 2023
Low-molecular-weight protein tyrosine phosphatases (LMW-PTPs) are involved in promoting the intracellular survival of Mycobacterium tuberculosis (Mtb), the causative organism of tuberculosis.
Abdulhakeem O. Sulyman, Jessie Fulcher, Samuel Crossley, Amos A. Fatokun, Femi J. Olorunniji   +4 more
doaj   +1 more source

Diels-Alder Cycloaddition of Cyclopentadiene to a Bis-naphthoquinone

Molecules, 2000
Addition of cyclopentadiene to bis-naphthoquinone (1) afforded predominantly the endo-endo [4+2] cycloadduct (2).
Letecia J. Duncalf, Margaret A. Brimble
doaj   +1 more source

Electrochemical Studies and the Electrode Reaction Mechanism of Ferrocene and Naphthoquinones in Microemulsion Medium at GC Electrode

International Journal of Electrochemical Science, 2020
The electrochemical behavior of 1,4-napthoquinone (1,4-NAQ) and 2-methyl-1,4-naphthoquinone (2-Me-1,4-NAQ) was investigated in bis-(2-ethylhexyl) sulfosuccinate (EHSS) anionic surfactant and its microemulsion system as well as in aqueous medium using ...
M. Abdallah, Ahmed Alharbi, Moataz Morad, Ahmed M. Hameed, Salih S. Al-Juaid, N. Foad, E.M. Mabrouk   +6 more
doaj   +1 more source

Photogrammetry of Ultrafast Excited-State Intramolecular Proton Transfer Pathways in the Fungal Pigment Draconin Red

Molecules, 2023
Proton transfer processes of organic molecules are key to charge transport and photoprotection in biological systems. Among them, excited-state intramolecular proton transfer (ESIPT) reactions are characterized by quick and efficient charge transfer ...
Janak Solaris, Taylor D. Krueger, Cheng Chen, Chong Fang   +3 more
doaj   +1 more source