Search
Now showing items 1-10 of 24
Soil heavy metal concentration patterns at two speed zones along the Gaborone-Tlokweng border post highway, Southeast Botswana
(JASEM http://www.ajol.info/index.php/jasem/article/view/43693/27216, 2006-06)
Since 1988 Botswana has been experiencing an unprecedented increase in vehicular traffic which
is suspected to be having contamination effects on soils along heavily used roads in the country. This study aimed at
understanding ...
Magnetic hysteresis properties of interacting and noninteracting micron-sized magnetite produced by electron beam lithography
(AGU and the Geochemical Society. http://www.agu.org/journals/gc/index.shtml, 2006)
The magnetic hysteresis properties for well-defined micron-sized magnetite samples produced by
electron beam lithography (EBL) are presented. In addition to measuring standard hysteresis parameters,
first-order reversal ...
Photochromism, anomalous multi-banded fluorescence and laser properties of some amino- and tosyl-amino derivative of oxadiazole
(Elsevier Ltd. www.elsevier.com/locate/saa, 2006)
The multi-banded fluorescence and laser properties of 11 new amino- and tosylamino derivatives of 2,5-di(phenyl)-1,3,4-oxadiazole and oxadiazole in various solvents at 293 K are reported. All the compounds investigated ...
A ca. 200Ma hiatus between the Lower and Upper Transvaal Groups of southern Africa: SHRIMP U–Pb detrital zircon evidence from the Segwagwa Group, Botswana: Implications for Palaeoproterozoic glaciations
(Elsevier B.V. www.elsevier.com/locate/epsl, 2006)
The Segwagwa Group of southeastern Botswana, a correlate of the Pretoria Group of the Transvaal Supergroup of South Africa,
consists of a major sequence of siliciclastic sedimentary rocks, minor carbonates and basaltic ...
The Okwa basement complex, western Botswana: U–Pb zircon geochronology and implications for Eburnean processes in southern Africa
(Elsevier Ltd. www.elsevier.com/locate/jafrearsci, 2006)
The Okwa Basement Complex crops out at the northwestern edge of the Kaapvaal craton within the Okwa Inlier, an isolated exposure
of Precambrian basement in the Kalahari Desert. New U–Pb zircon dating was performed on all ...
Evaluation of methods for the isolation, detection and quantification of cyanobacterial hepatotoxins
(Elsevier Ltd. www.elsevier.com/locate/aquatox, 2006)
Cyanobacterial hepatotoxins such as microcystins and nodularins have been responsible for the poisoning of both animals and humans who
ingest or come into contact with toxic blooms. They are extremely stable in water due ...
Deltamethrin in sediment samples of the Okavango Delta, Botswana
(Water SA Pretoria; Water Research Commission; http://www.wrc.org.za/, 2006-10)
Deltamethrin concentrations were determined in 35 sediment samples collected from three different habitats: channel, lagoon and pool sites from Xakanaxa in the Okavango Delta, NW Botswana. The samples were Soxhlet-extracted ...
A numerical study of some modified differential evolution algorithms
(Elsevier; www.elsevier.com/locate/ejor, 2006)
Modifications in mutation and localization in acceptance rule are suggested to the differential evolution algorithm for global optimization. Numerical experiments indicate that the resulting algorithms are considerably ...
Investigation of sustainability of rain-fed agriculture through soil moisture modeling in the Pandamatenga Plains of Botswana
(Elsevier Ltd. http://www.elsevier.com/wps/find/journaldescription.cws_home/413/description#description, 2006)
The agricultural economic sector of Botswana is limited mainly to range resources-based livestock and pockets of arable farming
based on rainfall and limited irrigated agriculture at several places. In this study agricultural ...
Petrology and geochemistry of the Neoproterozoic Nguba and Kundelungu Groups, Katangan Supergroup, southeast Congo: Implications for provenance, paleoweathering and geotectonic setting
(Elsevier www.elsevier.com/locate/jafrearsci, 2006)
The Nguba and Kundelungu Groups constitute the middle and upper parts of the Neoproterozoic Katangan Supergroup, respectively,
and consist of conglomerates, sandstones, mudrocks and carbonates. During deposition, the ...