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Faculty of Natural Sciences@PUK

Faculty of Natural Sciences@PUK

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Recent Submissions

The second Fermi large area telescope catalog of gamma-ray pulsars

Abdo, A.A.; Ajello, M.; Allafort, A.; Baldini, L.; Venter, C. (American Astronomical Society, 2013)

This catalog summarizes 117 high-confidence ≥0.1 GeV gamma-ray pulsar detections using three years of data acquired by the Large Area Telescope (LAT) on the Fermi satellite. Half are neutron stars discovered using LAT data ...
UV Spectrophotometric method for the identification and solubility determination of nevirapine

Stieger, N.; Liebenberg, W.; Wessels, J.C. (Govi Verlag, 2009)

An UV spectrophotometric method was developed for the quantitativedetermination of nevirapine in water,methanol and 0.1NHCl. It was found that qualitativedetermination is also possible, due to a peak-shift observedwith ...
Evaluation of charge density and the theory for calculating membrane potential for a nano-composite nylon-6,6 nickel phosphate membrane

Arfin, T.; Falch, A.; Kriek, R.J. (Royal Society of Chemistry, 2012)

A new crystalline organic–inorganic nano-composite nylon-6,6 nickel phosphate membrane was synthesised subsequent to which (a) the physico-chemical characteristics of the membrane were evaluated employing FTIR, SEM, EDX, ...
The importance of including toxicity assays when screening plant extracts for antimalarial activity

Van Dyk, Sandra; Griffiths, Sharon; Van Zyl, Robyn L.; Malan, Sarel F. (Academic Journals, 2009)

Identifying plant extracts as sources of antimalarial compounds needs to be addressed as numerous studies screen extracts without the means of eliminating extracts that are merely cytotoxic. Fifty-nine organic solvent ...
Formulation effects of topical emulsions on transdermal and dermal delivery

Otto, A.; Du Plessis, J.; Wiechers, J.W. (Wiley, 2009)

It has been recognized that the vehicle in which a permeant is applied to the skin has a distinctive effect on the dermal and transdermal delivery of active ingredients. The cutaneous and percutaneous absorptions can be ...
SO2 – an indirect source of energy

Kriek, R.J.; Van Ravenswaay, M.; Potgieter, A.; Calitz, V.; Lates, M.E. (Southern African Institute of Mining and Metallurgy (SAIMM), 2013)

Global sulphur dioxide (SO2) emissions peaked around the mid-1970s, after which they declined. However, with the growth of specifically China, emissions are on the rise again. In 2008, global anthropogenic SO2 emissions ...