Results 21 to 30 of about 17,647 (331)

Microsomal superoxide anion production and NADPH-oxidation in a series of 22 aziridinylbenzoquinones [PDF]

open access: yes, 1989
Several 2,5-bis(1-aziridinyl)-1,4-benzoquinones (BABQs) can be activated to alkylating species by reduction of the quinone moiety. On the other hand, cytotoxicity of these compounds can be induced by redox cycling.
Koster, Andries Sj.   +3 more
core   +3 more sources

Benzoquinones from scent glands of phalangiid harvestmen (Arachnida, Opiliones, Eupnoi): a lesson from [PDF]

open access: hybrid, 2014
Günther Raspotnig   +4 more
core   +3 more sources

Synthesis and cytotoxic activity of geranylmethoxyhydroquinone derivatives [PDF]

open access: yes, 2012
Indexación: Web of Science; ScieloEl geranilo-2 ,4-sintético nuevo methoxyhydroquinone 1 y el conocido geranilo-4 ,5 methoxyhydroquinone- 2 se prepararon por sustitución electrófila aromática (EAS) reacciones entre geraniol y 1,3,5-trimethoxyphenol ...
Baeza Maturana, Evelyn   +5 more
core   +1 more source

ZZE-Configuration of chromophore ß-153 in C-phycocyanin from Mastigocladus laminosus [PDF]

open access: yes, 1987
The photochemistry of C-phycocyanin has been studied after denaturation in the dark. It shows an irreversible reaction which has characteristics of a Ζ,Ζ,Ε- to Z,Z,Z-isomerization of dihydrobilins. Its amplitude depends on the reaction conditions, with
Bode, W.   +7 more
core   +1 more source

A Model for Phylogenetic Chemosystematics: Evolutionary History of Quinones in the Scent Gland Secretions of Harvestmen

open access: yesFrontiers in Ecology and Evolution, 2017
By the possession of unique exocrine scent glands, Opiliones (harvestmen) arise as a perfect model for studies on the evolutionary history of secretion chemistry.
Günther Raspotnig   +5 more
doaj   +1 more source

Biomarkers of leukemia risk: benzene as a model. [PDF]

open access: yes, 1998
Although relatively rare, leukemias place a considerable financial burden on society and cause psychologic trauma to many families. Leukemia is the most common cancer in children.
Smith, MT, Zhang, L
core   +3 more sources

Reactivity measurement in estimation of benzoquinone and benzoquinone derivatives’ allergenicity [PDF]

open access: yesToxicology, 2016
Benzoquinone (BQ) and benzoquinone derivatives (BQD) are used in the production of dyes and cosmetics. While BQ, an extreme skin sensitizer, is an electrophile known to covalently modify proteins via Michael Addition (MA) reaction whilst halogen substituted BQD undergo nucleophilic vinylic substitution (SNV) mechanism onto amine and thiol moieties on ...
Wilbes Mbiya   +3 more
openaire   +3 more sources

Reductive activation of potential antitumor bis(aziridinyl)benzoquinones by xanthine oxidase: Competition between oxygen reduction and quinone reduction [PDF]

open access: yes, 1990
The reduction of a series of 2,5-bis(1-aziridinyl)-1,4-benzoquinone (BABQ) derivatives with various 3,6 substituents by the enzyme xanthine oxidase has been studied.
Janssen, L.H.M.   +5 more
core   +3 more sources

Biosynthesis of food constituents: Natural pigments: Part 1

open access: yesCzech 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   +2 more
doaj   +1 more source

Targeting the substrate preference of a type I nitroreductase to develop antitrypanosomal quinone-based prodrugs. [PDF]

open access: yes, 2012
Nitroheterocyclic prodrugs are used to treat infections caused by Trypanosoma cruzi and Trypanosoma brucei. A key component in selectivity involves a specific activation step mediated by a protein homologous with type I nitroreductases, enzymes found ...
Alsford   +68 more
core   +1 more source

Home - About - Disclaimer - Privacy