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- Browsing Research Articles (Chemistry) by Issue Date
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Browsing Research Articles (Chemistry) by Issue Date
Now showing items 21-40 of 627
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(Elsevier, 2009)To rationalize the influence of molecular architecture on metal ion selectivity and affinity, a DFT study of three amino-alcohol ligands, bis(2-hydroxyethyl)-ethane-1,2-diamine (BHEEN), and two ligands where the backbone ...
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(Routledge, 2009)On exposure to the potential carcinogen 1,3-butadiene, the major urinary metabolite in humans is N-acetyl-S-(3,4-dihydroxybutyl)cysteine. A novel, stereoselective synthesis of this cysteine–butadiene metabolite has ...
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(Elsevier, 2009-04)A headspace sampling method is described for concentrating milk volatiles onto a multi-channel open tubular silicone rubber trap (MCT) for thermal desorption into a GC-FID. Sections of the chromatographic profile, single ...
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(Elsevier, 2009-04)A novel analytical method for atmospheric polycyclic aromatic hydrocarbons (PAHs) was developed based on laser induced fluorescence (LIF) of samples on quartz multi-channel polydimethylsiloxane traps. A tunable dye laser ...
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(Royal Society of Chemistry, 2009-05-27)The crystal structures of five long-chain n-alkylammonium bromide monohydrates, with carbon chain lengths ranging from 13 to 18, were determined. n-Tridecylammonium bromide monohydrate 1, n-tetradecylammonium bromide ...
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(South African Chemical Institute, 2009-09)A glass electrode (GE) can be successfully employed to measure pH in the study of metal-ligand equilibria by voltammetry at extremely low pH (between 0 and 2); two consecutive strong acid–strong base titrations involving ...
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(University of Toronto Press, 2009-12)The features in common between the well-known Bode–Titius law, other commensurable astronomical relation- ships, and the organization of self-similar atomic systems, are used to demonstrate that the orbital data of all ...
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(Royal Society of Chemistry, 2010)The integrity and properties of mycolic acid (MA) antigens integrated into a self-assembled monolayer (SAM) of N-(2-mercaptoethyl)octadecanamide, (MEODA), on a gold electrode have been interrogated using cyclic voltammetry ...
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(South African Chemical Institute, 2010)There has been much discussion on the impact of the new curricula for Grades 10–12 on the preparedness for tertiary studies of the 2009 cohort in subjects such as mathematics, chemistry and physics. Using the Chemical ...
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(International Union of Crystallography, 2010)A fundamental understanding of the role of oxyanion geometry on molecular packing and non-covalent interactions in salt crystal structures is central to the fields of both molecular recognition and crystal engineering. The ...
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(Springer, 2010-01)Oxidation induction times (OIT) and oxidation onset temperatures (OOT) of a low density polyethylene melt were evaluated in air using DSC. Good regression fits to OOT data were obtained using global values for the ...
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(American Chemical Society, 2010-02)An explicit application of isodesmic reaction (a proton exchange between the studied and structurally similar reference molecule), where the free energy change of the protonation reaction in water was obtained using the ...
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(Elsevier, 2010-02)A new method for the stereoselective synthesis of the (R,R)-b-hydroxy-a-alkyl fatty acid fragment of mycolic acids, via an asymmetric anti-aldol reaction is reported. The ‘mycolic acid motif’ fragment was prepared in three ...
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(Royal Society of Chemistry, 2010-05)The activation of a section, or of all the carbons of thiophene by bromine in lithium–halogen exchange reactions, was implemented in a step-wise manner to facilitate the preparation of novel multiple Fischer carbene-bearing ...
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(Routledge, 2010-07)This study investigated the use of performance-confidence relationships to signal the presence of alternative conceptions and inadequate problem-solving skills in mechanics. A group of 33 students entering physics at a ...
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(Royal Society of Chemistry, 2010-08)Early identification of students at risk of failing first-year chemistry allows timely intervention. Cognitive factors alone are insufficient predictors for success; however, non-cognitive factors are usually difficult to ...
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(Royal Society of Chemistry, 2010-08)The electron transfer dynamics and electrocatalytic behaviour of ferrocene-terminated self-assembled monolayers (SAMs), co-adsorbed with single-walled carbon nanotubes (SWCNTs) on a gold electrode, have been interrogated ...
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(American Chemical Society, 2010-08)The log K1 value of analytical quality was obtained for the NiNTPA complex using the density functional theory (DFT)-computed (at the B3LYP/6-311þþG(d,p) level of theory in solvent, CPCM/UAKS) G(aq) values of the ...
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(Royal Society of Chemistry, 2010-10)A novel platinum-based macrocycle, iron(II) tetrakis(diaquaplatinum)octacarboxyphthalocyanine (PtFeOCPc), was synthesised and characterised. The heterogeneous electron transfer and electrocatalytic properties of this ...
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(Elsevier, 2010-10)Two H...H close contacts, classically associated with steric hindrance, were found to be H–H closed-shell bonding interactions which stabilize a zinc(II) complex with nitrilotri-3-propanoic acid, [Zn(NTPA)(H2O)2]–, by ca. ...
Now showing items 21-40 of 627