Products of the gas-phase reaction of OH radicals with 2-hexyl nitrate (containing 13% 3-hexyl nitrate) have been investigated by gas chromatography with mass spectral and flame ionization detection, and by direct air sampling atmospheric pressure ionization tandem mass spectrometry. The product...
Over the past decade, the chemistry of σ-accepting or Z-type ligands based on main group elements has drawn renewed attention because of the realization that their interaction with a transition metal (M) could be used to control the reactivity of the metal center. In this article, we describe s...
The solubility of lamotrigine in the aqueous mixtures of 1-hexyl-3-methylimidazolium bromide [HMIm][Br] were determined up to 0.8 mass fraction of [HMIm][Br] at several temperatures T= (293.2 to 313.2) K. The λ -h and van’t Hoff models with temperature dependency and Jouyban-Acree-van’t Hoff,...
This study was performed to establish the proper liquid chromatographic conditions for the separation of hexabromocyclododecane (HBCD) diastereomers. Column selectivity towards HBCD diastereomers was evaluated for C18 and phenyl-hexyl stationary phases. First, the baseline separation of the prim...
The kinetics of the reactions of n-butyl (BTN), isobutyl (IBN), n-pentyl (PTN) and 3-methyl-1-butyl (3M1BN) nitrates with OH radicals has been studied using a low pressure flow tube reactor combined with a quadrupole mass spectrometer. The rate constants of the title reactions were determined un...
In this research, three asymmetrical p-isobutyl acetophenone azine 1-3 named 1-(1-(4-isobutylphenyl)ethylidene)-2-(1-phenylethylidene) hydrazine, 1-(1-(4-isobutylphenyl)ethylidene)-2-(1-4-nitrophenylethylidene) hydrazine, 1-(1-(4-isobutylphenyl)ethylidene)-2-(1-4-methoxyphenylethylidene) hydrazi...
Experimental liquid–liquid equilibria of the ternary system of water + lactic acid + methyl isobutyl ketone (MIBK) were studied at T = (298.15, 303.15 and 308.15) K under atmospheric conditions. Complete phase diagrams were obtained by determining solubility and tie-line data. The ternary syste...
The enantioselective dissipation of the enantiomers of fluazifop-butyl in tomato, cucumber, pakchoi, rape and soil under field condition was investigated to elucidate the enantioselective environmental behaviours and chiral stability of the optical pure product. Fluazifop, the major chiral metab...
Poly (n-butyl cyanoacrylate) (PBCA) nanoparticles are widely used as biocompatible and bio-erosive materials in a range of biomedical applications, especially for drug delivery systems. This paper reports a novel synthesis method of PBCA nanoparticles with high productivities and purities in a r...
The reaction of O2 with butyl radicals is a key early step in the oxidation of n-butane, which is a prototypical alkane fuel with combustion properties that mimic those of many larger alkanes. Current combustion mechanisms employ kinetic descriptions for such radical oxidations that are based on...
Steroidal alkaloids, as the major biologically active components in Bulbus Fritillariae, possess a variety of toxicological and pharmacological effects on humans. The objective of this work was to determine whether endophytic fungi isolated from fresh bulbs of Fritillaria unibracteata var. waben...
The major biological active ingredients of Bulbus Fritillariae cirrhosae (BFC) are steroidal alkaloids, such as peimisine, imperialine-3β-d-glucoside, and peimine. The bulbus of Fritillaria unibracteata var. wabuensis (FUW) was officially recorded in the National Pharmacopoeia of China (2010 ed...
A convenient and efficient one-pot synthesis of cyclopamine from peimisine is described. The key steps involve one-pot hydrazination and subsequent Bamford–Stevens reaction. The mild reaction conditions, high overall yield as well as an easy purification indicate this process can potentially be...
The pathophysiology of brain lesions associated with cerebral palsy is multifactorial and likely involves excess release of glutamate and excess production of free radicals, among other factors. Theoretically, antioxidants could limit the severity of these brain lesions. Peroxiredoxins are a fam...
Excitatory amino acid (EAA) receptors were studied in Xenopus laevis oocytes microinjected with 1-day-old chick brain mRNA using a two-electrode voltage clamp technique. EAA agonists could be differentially characterised according to their current/voltage (IV) relationships; IV plots to kainate ...
Phenylglyoxal reacts with N-benzyloxy-N’-(2-bromophenyl)urea forming N-[(benzoyl)(hydroxy)methyl]-N-benzyloxy-N’-(2-bromophenyl)urea. As it was found by XRD study, the molecules of the latter in crystal exist in two forms which vary in a different degree of pyramidality of the same nitrogen at...
A new high-performance liquid chromatographic (HPLC) method has been developed for the determination of the cysteine prodrug, l-2-oxothiazolidine-4-carboxylic acid (Procysteine®), in human plasma. Samples were mixed with 5% metaphosphoric acid and the supernatants chromatographed using a reverse...
ObjectiveTo determine the levels of glutathione and cysteine in patients with ARDS and examine the effect of treatment with N-acetylcysteine (NAC) and L-2-oxothiazolidine-4-carboxylate (Procysteine; Clintec Technologies Inc; Chicago [OTZ]) on these levels and on common physiologic abnormalities,...
Decreased enzymatic production of cysteine in premature and newborn infants may limit the synthesis of glutathione. Unfortunately, cysteine supplementation is limited by associated toxicity and product instability. Procysteine™ (l-2-oxothiazolidine-4-carboxylate) is a prodrug of cysteine that is...
This study was conducted to determine the efficacy of amino acids and/or Procysteine (Clintec Technologies, Inc., Deerfield, IL, USA) on the recovery of cardiac function of the rat heart subjected to ischemia/reperfusion. Recovery of myocardium following ischemia/reperfusion is affected by both ...
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