Three end-capped para-benzoyl calixarene bonded silica gel stationary phases are prepared and characterized by elemental analysis, infrared spectroscopy, and thermal analysis. The comparison and selectivity of these phases are investigated by using PAHs, disubstituted benezene, and naphthalene positional isomers as probes. Possible separation mechanism based on the different interactions betwee...

This work presents the synthesis of eight new rhodium(III) dihalido complexes, [RhX2(L)(LH)] (where X = Cl or I), which incorporate two bidentate N-(3-halidophenyl)picolinamide ligands. The ligands have different binding modes in whereby one is neutral and bound via N,N (LH) coordination, while other anionic N,O (L) coordination. solid state solution studies confirm multiple isomers are present...

We investigate the dehydrogenation of decalin for the production of pure hydrogen for fuel cell applications. Supported Pt catalysts can achieve about 98% conversion with >99.9% selectivity for the dehydrogenation reaction. Cracking reactions occur only at high temperature. The partially dehydrogenated product, tetralin, was formed with a molar selectivity <6%, depending on the operating condit...

Two micro-mesoporous carbons (MMCs): a disordered mesoporous carbon (DMC) and an ordered (OMC), synthesized by easy, low-cost, green method are proposed as efficient hydrocarbon sieves for the separation of C6 isomers: n-hexane (nHEX), 2-methylpenthane (2 MP) 2,2-dimethylbutane (22DMB). Their textural characterization reveals highly interconnected pore network within DMC, while reverse hierarch...

This report describes the rapid characterization of positional and structural carbohydrate isomers based on structural separations provided by ion mobility-mass spectrometry (IM-MS). Many of the diseases associated with glycoprotein variation can be more effectively treated with earlier detection substantiating the need for high-throughput methodologies for glycan characterization. This remains...

The absorption and distribution of deuterated trans- and cis-13-octadecenoic acid (13t-18:1 and 13c-18:1) in plasma lipids were compared to deuterated cis-9-octadecenoic acid (9c-18:1) in two young adult male subjects. A mixture of triglycerides was fed in a multiple-labeled experiment where each triglyceride contained a fatty acid labeled with a different number of deuterium atoms. Analysis of...

List-based approaches for judicial control of synthetic drugs inevitably introduce a group legal highs that do not fall under the scope legislation but may exhibit similar effects and associated health risks as illicit substances. Differences between controlled uncontrolled components be minor single molecular rearrangement. This phenomenon complicated forensic drug analysis in recent years due...

β-N-methylamino-L-alanine (BMAA) is a neurotoxic non-protein amino acid suggested to be involved in neurodegenerative diseases. It was reported to be produced by cyanobacteria, but also found in edible aquatic organisms, thus raising concern of a widespread human exposure. However, the chemical analysis of BMAA and its isomers are controversial, mainly due to the lack of selectivity of the anal...