A series of novel hexadentate enterobactin analogues, which contain three catechol chelating moieties attached to different molecular scaffolds with flexible alkyl chain lengths, were prepared. The solution thermodynamic stabilities of the complexes with uranyl, ferric(III), and zinc(II) ions were then investigated. The hexadentate ligands demonstrate effective binding ability to uranyl ion, an...

Stick-slip vibrations present at the bottom hole assembly (BHA) of a generic oilwell drillstring subject to dry friction are studied. Different nonlinear differential equations-based models of a drillstring are analyzed. The drillstring models presented are oriented to avoid simulation problems due to the discontinuities originated by the presence of dry friction. The influence of different dri...

Reactive oxygen species (ROS) such as superoxide radical anion, hydroperoxyl radical are generated in cells from byproducts of metabolism and responsible for the development of a wide number of degenerative diseases such as cardiovascular disease (CVD), diabetic, cirrhosis and several cancers1. All organisms have their own antioxidant defense system to protect them against free radical damage b...

Dietary constituents of 2 types have been shown to affect the metabolism of chemical carcinogens by the microsomal mixed-function oxidase system. Naturally occurring inducers of increased activity of this system are present in plants. Cruciferous vegetables including Brussels sprouts, cabbage, and cauliflower are relatively potent in this regard. From these vegetables, three indoles with induci...

During aging processing, black carbon (also called soot) particles may tend to be mixed with other aerosols, and highly influence their radiative forcing. In this study, freshly emitted soot particles were simulated as fractal aggregates composed of small spherical primary monomers. After aging in the atmosphere, soot monomers were coated by a thinly layer of sulfate as thinly coated soot parti...

There is increasing controversy about the use of the whip as a performance aid in Thoroughbred horseracing and its impact on horse welfare. This paper offers a critical analysis of the British Horseracing Authority's (BHA) 2011 Report Responsible Regulation: A Review of the Use of the Whip in Horseracing. It examines the BHA's process of consultation and use of science and public opinion resear...

AP-1 has been shown to behave as a redox-sensitive transcription factor that can be activated by both oxidant and antioxidant stimuli. However, the mechanisms involved in the activation of AP-1 by antioxidants are largely unknown. In this study we show that the structurally unrelated antioxidant agents pyrrolidine dithiocarbamate (PDTC), butylated hydroxyanisole, and Nacetylcysteine activated J...

Dopamine increased membrane lipid peroxidation in DOPC/DOPS (8:2) liposomes which are consisting of unsaturated lipids, L-?-dioleoylphosphatidylcholine (DOPC) and L-?-dioleoylphosphatidylserine (DOPS). However, when exposed to X-rays at 4 Gy, was mitigated the presence dopamine same level as an antioxidant butylated hydroxyanisole, measured by fluorescence spectroscopy. Meanwhile, 2-phenylethyl...