Department of Chemistry
Recent Submissions
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Unequivocal structure confirmation of a breitfussin analog by anisotropic NMR measurements
(Journal article; Peer reviewed, 2020)Structural features of proton-deficient heteroaromatic natural products, such as the breitfussins, can severely complicate their characterization by NMR spectroscopy. For the breitfussins in particular, the constitution ... -
Recovered Energy from Salinity Gradients Utilizing Various Poly(Acrylic Acid)-Based Hydrogels
(Journal article; Peer reviewed, 2021-02-22)Hydrogels can be utilized to extract energy from salinity gradients when river water mixes with seawater. Saline-sensitive hydrogels exhibit a reversible swelling/shrinking process when they are, alternately, exposed to ... -
Effect of initial water flooding on the performance of polymer flooding for heavy oil production
(Journal article; Peer reviewed, 2020)In the domain of heavy to extra heavy oil production, viscous polymer may be injected after water injection (tertiary mode), or as an alternative (secondary mode) to improve the sweep efficiency and increase oil recovery. ... -
Functionalization of the Imidazole Backbone by Means of a Tailored and Optimized Oxidative Heck Cross-Coupling
(Journal article; Peer reviewed, 2020)A general and selective Pd-catalyzed cross-coupling of aromatic boronic acids with vinyl-imidazoles is disclosed. Unlike most cross-coupling reactions, this method operates well in absence of bases avoiding the formation ... -
Nanoscale organolanthanum clusters: Nuclearity-directing role of cyclopentadienyl and halogenido ligands
(Journal article; Peer reviewed, 2020)Tetramethylaluminato/halogenido(X) ligand exchange reactions in half-sandwich complexes [CpRLa(AlMe4)2] are feasible in non-coordinating solvents and provide access to large coordination clusters of the type [CpRLaX2]x. ... -
9-Acridinemethanamine and Acridine-9-Carboxaldehyde as Potential Fluorescence Lifetime pH Indicators
(Journal article; Peer reviewed, 2020)A significant challenge concerning the development of fluorescence lifetime (FL) based pH sensors is the paucity of fluorophores with sufficiently large FL variation with pH. Acridine is amongst the indicators with highest ... -
On the Modelling of Immiscible Viscous Fingering in Two Phase Flow in Porous Media
(Journal article; Peer reviewed, 2020)Viscous fingering in porous media is an instability which occurs when a low-viscosity injected fluid displaces a much more viscous resident fluid, under miscible or immiscible conditions. Immiscible viscous fingering is ... -
Metal-Organic Frameworks with Open Metal Sites for Carbon Dioxide Conversion and Argon Adsorption
(Master thesis, 2021-06-15) -
A calcium zirconate based combined material for calcium-copper chemical looping technology
(Journal article; Peer reviewed, 2020)Combined calcium-copper materials based on calcium zirconate (CaO/CuO/CaZrO3) for Calcium-Copper Chemical Looping (Ca-Cu Looping) have been synthesized using a scalable wet chemical method and characterized by powder X-ray ... -
Isolation and Characterization of Larvicidal Phenolic Acids from Kotschya thymodora Leaves
(Journal article; Peer reviewed, 2020)Malaria is a vector borne disease responsible for high morbidity, mortality and poverty in many tropical and subtropical countries. The disease is transmitted through a bite from an infected female Anopheles mosquito, ... -
Anthocyanin Profile and Antioxidant Activity of Edible Leaves of Dissotis brazzae Cogn (Melastomataceae)
(Journal article, 2020)Anthocyanins are colored bioactive phytochemicals in the class of flavonoids with high potential as dietary antioxidants. Demand for anthocyanins in functional food and nutraceutical industries has continued to increase ... -
Amino-Functionalised Pillared-Layered Metal-Organic Frameworks: Characterisation and Selective Adsorption Properties
(Master thesis, 2021-06-01)Materials technology, with the focus of discovery of new materials which are tailor-designed with a very particular set of properties suitable for application, has provided essential developments for the modern society ... -
Analysis of Polymer Injectivity in Porous Media
(Doctoral thesis, 2021-07-01)Polymers are chemical substances that occur both naturally or synthesized and consist of large macromolecules. They are created by the process of polymerization of many smaller molecules also known as monomers. Due to their ... -
Analysis and Simulation of Polymer Injectivity Test in a High Temperature High Salinity Carbonate Reservoir
(Journal article; Peer reviewed, 2021-05-27)Polymer flooding has gained much interest within the oil industry in the past few decades as one of the most successful chemical enhanced oil recovery (CEOR) methods. The injectivity of polymer solutions in porous media ... -
Polymer Injectivity Test Design Using Numerical Simulation
(Journal article; Peer reviewed, 2020-04-03)Polymer flooding is an enhanced oil recovery (EOR) process, which has received increasing interest in the industry. In this process, water-soluble polymers are used to increase injected water viscosity in order to improve ... -
Formation of an Isomeric Mixture of Dienynes Instead of a Diallene
(Journal article, 2020)Attempts to convert 1,1,2,2,7,7,8,8-octaethoxyocta-3,5-diyne to a symmetric allene by reduction with lithium aluminum hydride failed. Instead reduction accompanied by isomerization occurred and afforded 1,1,2,7,8,8-hexae ... -
Quantitative NMR analysis of the aqueous phase from hydrothermal liquefaction of lignin
(Journal article; Peer reviewed, 2020-08-06)Hydrothermal liquefaction (HTL) of biomass such as lignin could contribute to finding replacements for petroleum, both as a fuel and production of chemicals. The organic phase produced in formic acid assisted HTL of lignin ... -
A comparison of analytical approaches to investigate associations for accelerometry-derived physical activity spectra with health and developmental outcomes in children
(Journal article; Peer reviewed, 2021)The use of high-resolution physical activity intensity spectra obtained from accelerometry can improve knowledge of associations with health and development beyond the use of traditional summary measures of intensity. The ... -
Interpretation of associations between the accelerometry physical activity spectrum and cardiometabolic health and locomotor skills in two cohorts of children using raw, log-transformed, or compositional data
(Journal article; Peer reviewed, 2020)It is discussed whether associations between accelerometer-derived physical activity intensities and outcomes should be analysed as absolute or relative data. The aim of the present study was to compare interpretation of ... -
Variable importance: Comparison of selectivity ratio and significance multivariate correlation for interpretation of latent‐variable regression models
(Journal article; Peer reviewed, 2020)This work examines the performance of significance multivariate correlation (sMC) and selectivity ratio (SR) for ranking variables according to their importance in latent-variable regressions (LVRs) models. Both indices ...
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