- UPSpace Home
- →
- Browsing by UP Author
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by UP Author "Rohwer, Egmont Richard"
Now showing items 1-20 of 51
-
Advancing the analytical toolkit in the investigation of vector mosquito host biting site selection Wooding, Madelien; Dodgen, Tyren; Rohwer, Egmont Richard; Naude, Yvette (Wiley, 2024-01)High-resolution mass spectrometry and ion mobility spectrometry provide additional confidence in biological marker discovery and elucidation by adding additional peak capacity through physiochemical separation orthogonal ...
-
Potgieter H.; Bekker R.; Beigley J.; Rohwer, Egmont Richard (Elsevier, 2017-08)Heavy petroleum fractions are produced during crude and synthetic crude oil refining processes and they need to be upgraded to useable products to increase their market value. Usually these fractions are upgraded to fuel ...
-
Brits, Martin; Brandsma, Sicco H.; Rohwer, Egmont Richard; De Vos, Jayne; Weiss, Jana M.; De Boer, Jacob H. (Elsevier, 2019-10)Flame retardants (FRs), such as brominated flame retardants (BFRs) and organophosphorus flame retardants (OPFRs), are diverse groups of compounds used in various products related to the indoor environment. In this study ...
-
Forbes, Patricia B.C.; Karg, Erwin W.; Geldenhuys, Genna-Leigh; Nsibande, Sifiso Albert; Zimmermann, Ralf; Rohwer, Egmont Richard (National Association for Clean Air, 2013-12)Atmospheric semi-volatile organic compounds (SVOCs), including polycyclic aromatic hydrocarbons (PAHs), are ubiquitous environmental pollutants, which may be present in the gaseous phase and adsorbed onto the surface of ...
-
Naude, Yvette; Gorst-Allman, Peter; Rohwer, Egmont Richard (Water Research Commission, 2015)Water pollution events may arise rapidly, requiring a methodology that is easy to implement, fast to deploy, and sufficiently sensitive to detect the trace presence of hazardous contaminants. A cheap and easy to use ...
-
Wooding, Madelien; Rohwer, Egmont Richard; Naude, Yvette (Springer, 2020-09)Volatile organic compounds (VOCs) and semi-VOCs detected on the human skin surface are of great interest to researchers in the fields of metabolomics, diagnostics, and skin microbiota and in the study of anthropophilic ...
-
Bouwer, Marc Clement; Slippers, Bernard; Wingfield, Michael J.; Rohwer, Egmont Richard (Springer, 2014-10)It is well-known that herbivorous insects respond to host plant volatiles. Yet details of how these insects perceive the complex profile of volatiles from different potential host plants has not been studied for most ...
-
Wood, Timothy Paul; Basson, A.E.; Duvenage, C.; Rohwer, Egmont Richard (Elsevier, 2016-11)The wastewater treatment process, besides discharging pharmaceuticals into the environment, has been found to result in the formation of a variety of undescribed compounds. Here we investigate the laboratory scale ...
-
Smit, Elize; De Goede, Stefan; Rohwer, Egmont Richard (American Chemical Society, 2018-08-27)The analysis of fuels is not straightforward, due to its complex nature, and many different techniques have been developed to address this complexity. This paper reports on the use of hydrophilic interaction liquid ...
-
Wooding, Madelien; Rohwer, Egmont Richard; Naude, Yvette (Elsevier, 2017-09-01)The presence of micropollutants in the aquatic environment is a worldwide environmental concern. The diversity of micropollutants and the low concentration levels at which they may occur in the aquatic environment have ...
-
Brits, Martin; Gorst-Allman, Peter; Rohwer, Egmont Richard; De Vos, Jayne; De Boer, Jacob; Weiss, Jana M. (Elsevier, 2018-02)The coupling of comprehensive two-dimensional gas chromatography with high-resolution time-of-flight mass spectrometry offers the best separation efficiency combined with accurate mass measurements over a wide mass range. ...
-
De Vos, Jayne; Dixon, Roger D.; Vermeulen, Gerhard; Gorst-Allman, Peter; Cochran, Jack; Rohwer, Egmont Richard; Focant, Jean-Francois (Elsevier, 2011-12)The disposal and dumping of toxic waste is a matter of growing concern in developing countries, including South Africa. Frequently these countries do not possess access to gas chromatography-high resolution mass spectrometry ...
-
Wooding, Madelien; Naude, Yvette; Rohwer, Egmont Richard; Bouwer, Marc Clement (BioMed Central, 2020-02)The use of semiochemicals in odour-based traps for surveillance and control of vector mosquitoes is deemed a new and viable component for integrated vector management programmes. Over 114 semiochemicals have been identifed, ...
-
Brits, Martin; De Vos, Jayne; Weiss, Jana M.; Rohwer, Egmont Richard; De Boer, Jacob (Elsevier, 2016-12)World-wide, the prevalence of brominated flame retardants (BFRs) is well documented for routine analysis of environmental and biological matrices. There is, however, limited information on these compounds in the African ...
-
Marjanovic-Painter, Biljana; Kleynhans, Janke; Zeevaart, Jan Rijn; Rohwer, Egmont Richard; Ebenhan, Thomas (Elsevier, 2023-01)BACKGROUND : Ubiquicidin is a peptide fragment with selective binding to negatively charged bacterial cell membranes. Besides its earlier labelling with gamma emitting radionuclides, it has been labelled with Positron ...
-
Makhubela, Portia Colisile Koketso; Rohwer, Egmont Richard; Naude, Yvette (Elsevier, 2023-12)Tuberculosis (TB) remains a global health concern. This study aimed to investigate the potential of human skin volatile organic compounds (VOCs) as prospective biomarkers for TB diagnosis. It employed a non-invasive approach ...
-
Wooding, Madelien; Rohwer, Egmont Richard; Naude, Yvette (Elsevier, 2017-05)Many rural dwellers and inhabitants of informal settlements in South Africa are without access to treated water and collect untreated water from rivers and dams for personal use. Endocrine disrupting chemicals (EDCs) have ...
-
Miano, Raphael Njurai; Mohamed, Samira A.; Cheseto, Xavier; Ndlela, Shepard; Biasazin, Tibebe Dejene; Yusuf, Abdullahi Ahmed; Rohwer, Egmont Richard; Dekker, Teun (Frontiers Media, 2022-11-14)Bactrocera dorsalis (Hendel) is a major pest of fruits and vegetables worldwide with documented losses of up to 100%. Various management techniques including the use of parasitoids, such as Fopius arisanus (Sonan) and ...
-
De Vos, Jayne; Gorst-Allman, Peter; Rohwer, Egmont Richard (Elsevier, 2011-05)Comprehensive Gas Chromatography–Time-of-Flight Mass Spectrometry (GC×GC–TOFMS) methodology has been refined for the analysis of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in ...
-
Naude, Yvette; Van Rooyen, Margaretha W.; Rohwer, Egmont Richard (Elsevier, 2011-12)The origin of the so-called “fairy circles” has not yet been established. Carbon monoxide (as an indicator of a natural gas microseep) was monitored inside and outside of the selected fairy circles in the Namib, Namibia, ...
Now showing items 1-20 of 51