The study investigates the effectiveness of a synthetic vitamin analog (vitamin K5) for the growth inhibition of a total of 14 bacterial pathogens, spoilage-inducing bacteria and three spoilage-inducing molds that were tested during this study. Bacterial growth inhibition by vitamin K5 and vitam...
Pyruvate kinase M2 (PKM2) is a rate-limiting enzyme of aerobic glycolysis in cancer cells and plays important roles in cancer metabolism and growth. Here we show that vitamin K 3 and K 5 (VK 3 and VK 5 ) are relatively specific PKM2 inhibitors. VK 3 and VK...
The effects of vitamin K (VK) derivatives VK 3 and VK 5 on human immune cells have not been extensively investigated. We examined the effects of VK 3 and VK 5 on proliferation, apoptosis, cytokine production, and CD4+CD25+Foxp3+ regulatory T (Treg) cell-frequency ...
Vitis tree leaves powder was used for efficient removal of dyes (eg, alizarin red and methylene blue) from water samples in binary batch systems. The influence of various parameters such as initial pH, initial dye concentration, and sorbent mass on the biosorption process was investigated. Stati...
For nearly a century, Alizarin red S (alizarin sodium sulfonate) has been used by morphologists to stain calcified bone matrix. More recently, its traditional use has frequently been replaced by more modern techniques; however, its auto fluorescent property continues to contribute to research we...
The photocatalytic oxidative degradation and discoloration of the reactive dye was investigated. Along with photochemical oxidation process, the sonochemical effect was also used. Experiments were performed in slurry mode in both UV and solar light at optimized conditions. Degradation observed w...
Semiconductors such as ZnO and TiO2 have been extensively utilized in the photocatalytic degradation of dyes. However till date, no study has been reported to compare the catalytic efficiency of such organic–inorganic hybrids under UV light and microwave irradiation separately. The present work...
A novel, chitosan coating on the surface of magnetite (Fe 3 O 4 ) (MIMC) was successfully synthesized using alizarin red (AR) as a template for adsorption and removal of AR from aqueous solutions. Characterization of the obtained MIMC was achieved by FTIR spectra, SEM micrographs...
The anthraquinoid dye, Alizarin Red S, forms an anionic moiety in aqueous solution. The complex formation of this dye was studied with the cationic surfactant, cetyltrimethylammonium bromide, in an aqueous environment at low surfactant concentrations. The complex was studied with the help of ult...
Most of the π l ,π* bands of metal alizarinates are shown to be due to the 2,9- or 1,2-anthraquinoid structures. Bimetallic alizarinates with the 9,10-anthraquinoid structure are not formed because of the adjacent negatively charged oxygen atoms. The long-standing dispute concerning the struct...
Enterococcal strains recovered from fecal samples of captive blue-fronted parrots (Amazona aestiva) assisted at two wild animal screening centers in Rio de Janeiro, Brazil, were identified as Enterococcus hirae (the predominant species; 75.3%), followed by Enterococcus faecalis (17.3%), Enteroco...
The active pharmaceutical ingredient 5-chloro-8-hydroxyquinoline, which has shown potential antituberculosis activities, crystallizes in two different polymorphic forms, denoted Form I (Banerjee et al. Acta Crystallogr, Sect C: Cryst Struct Commun C42:1408–11, 1986) and Form II. In this present...
Luminescent properties of 5-chloro-8-hydroxyquinoline (CHQ) free and appended tothe amines in diaza-18-crown-6 (A218C6) were determined. These propertieswere compared to those of bivalent alkaline earth and post-transition metal ioncomplexes of the appended macrocycle (CHQ-A218C6). The luminesce...
Magnesium(II) ions were complexed with 5-chloro-8-hydroxyquinoline (L) to give an MgL 2 chelate that emitted green fluorescent light in tetrahydrofuran (THF) solvent as well as in solid state when excited by UV light. The complex was found to produce electroluminescent (EL) and thus OLED...
In an effort to establish new candidates with enhanced anticancer activity of 5-hydroxy-7-methyl-1,4-naphthoquinone scaffold (7-methyljuglone) previously isolated from the root extract of Euclea natalensis, a series of 7-methyljuglone derivatives have been synthesized and assessed for cytotoxici...
A novel series of 1,4-naphthoquinones (33–44) tethered by open and closed chain sulfonamide moieties were designed, synthesized and evaluated for their cytotoxic and antimalarial activities. All quinone-sulfonamide derivatives displayed a broad spectrum of cytotoxic activities against all of th...
Naphthalene-1,4-dione derivatives were synthesized and tested against selected bacterial strains. All the tested compounds were prepared by direct introduction of corresponding substituents into the naphthoquinone core in oxidative conditions. In this study, eight strains of bacteria (Proteus, E...
Black carbon (BC) is a key component of atmospheric particles and has a significant effect on human health. BC can provide reactive sites and surfaces thus absorb quinones which were primarily generated from fossil fuel combustion and/or atmospheric photochemical conversions of PAHs. Oxidation c...
Naphthoquinone amino derivatives exhibit interesting physicochemical properties and a wide range of biological activities with potential medicinal applications. A clean, fast and simple method for the preparation of phenylamino-1,4-naphthoquinones is presented by the reaction of naphthoquinone (...
The antiplatelet and antithrombotic activities of a newly synthesized CP201, 2-(3,5-di-tert-butyl-4-hydroxyl)-3-chloro-1,4-naphthoquinone on human platelet aggregation in vitro and murine pulmonary thrombosis in vivo were examined. In addition, the antiplatelet activity of CP201 involved in calc...
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