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Now showing items 21-29 of 29
Two new pterocarpans and a new pyrone derivative with cytotoxic activities from Ptycholobium contortum (N.E.Br.) Brummitt (Leguminosae): revised NMR assignment of mundulea lactone
(Springer International Publishing, http://link.springer.com, 2016)
Background: Ptycholobium is a genus related to Tephrosia which comprises only three species. Compared to Tephrosia, which has been phytochemically and pharmacologically studied, Ptycholobium species have only few or no ...
Extensions of the Lusin's Theorem, the Severini-Egorov's Theorem and the Riesz Subsequence Theorems
(ScienceDomain International; www.sciencedomain.org, 2016-10-14)
We give extensions of the Lusin’s Theorem, the Severini-Egorov’s Theorem, and the Riesz Subsequence Theorems to the setting of a non-additive vector valued set functions and sequences of functions taking values in general ...
Refining the Y chromosome phylogeny with southern African sequences
(Springerlink, http://www.springer.com/, 2016)
The recent availability of large-scale sequence
data for the human Y chromosome has revolutionized analyses
of and insights gained from this non-recombining,
paternally inherited chromosome. However, the studies to ...
Land use, rangeland degradation and ecological changes in the southern Kalahari, Botswana
(John Wiley & Sons Ltd., https://onlinelibrary.wiley.com/, 2016-02-09)
Dual‐scale analyses assessing farm‐scale patterns of ecological change and landscape‐scale patterns of change in vegetation cover and animal distribution are presented from ecological transect studies away from waterpoints, ...
GC-MS analysis and preliminary antimicrobial activity of albizia adianthifolia (Schumach) and pterocarpus angolensis (DC)
(MDPI, https://www.mdpi.com/, 2016-01-29)
The non-polar components of two leguminoceae species Albizia adianthifolia (Schumach), and Pterocarpus angolensis (DC) were investigated. GC-MS analysis of the crude n-hexane and chloroform extracts together with several ...
Antioxidant and antidiabetic potential of Myrothamnus flabellifolius found in Botswana
(Cogent OA, https://www.cogentoa.com/journal/biology, 2016-12-29)
The total phenol content, antioxidant and antidiabetic activity of Myrothamnus flabellifolius (MF) were investigated. The study revealed 70% ethanol/water (EW70), 70% methanol/water (MW70) and methanol (Me) extracts to ...
Radio wave propagation experiment in sugarcane fire environments
(Scientific Research Publishing Inc., https://www.scirp.org/journal/jemaa/, 2016-07-21)
Large fires have an effect of suppressing Very or Ultra High Frequency (VHF/UHF) radio wave signals strength which consequently impact negatively on the efficiency of radio communications at the frequency ranges. Mobile ...
Transboundary pollution in the Capital City of Botswana
(Infogain Publication, https://ijeab.com/, 2016-09)
This paper presents aerosol studies carried out in the capital city of Botswana. The use of backward air mass trajectories has shown that elevated concentrations of fine particles correspond to situations when the air mass ...
The effects of cup-like and hill-like parabolic confining potentials on photoionization cross section of a donor in a spherical quantum dot
(EDP Sciences, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, https://www.springer.com/journal/10051, 2016-08-08)
A theoretical investigation of the effects of hill-like and cup-like parabolic confining electric potentials on photoionization cross section (PCS) in a spherical quantum dot is presented. The hill-like and the cup-like ...