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Now showing items 41-50 of 155
Comparative analysis of heavy metal concentration in secondary treated wastewater irrigated soils cultivated by different crops
(Springer, http://link.springer.com/, 2010-03)
The use of treated urban wastewater for irrigation is a relatively recent innovation in Botswana and
knowledge is still limited on its impact on soil heavy metal levels. The aim of this study is to analyze and compare ...
An assessment of Prosopis L. in the Bokspits Area, South-Western Botswana, based on Morphology
(Global Science Books, http://www.globalsciencebooks.info/, 2011)
The genus Prosopis comprises 44 species. Extensive introgression and hybridization is suspected in the genus, which makes identification of the species very difficult. Accurate identification of the species is crucial in ...
Effect of water stress on photosynthetic characteristics of two sorghum cultivars
(Global Science Books, http://www.globalsciencebooks.info/, 2011)
The effects of water stress on the photosynthetic characteristics of two locally-cultivated sorghum cultivars (‘Segaolane’ and ‘Town’) were investigated over a period of weeks. Water stress was imposed on 1-week-old plants ...
Tylosema esculentum extractives and their bioactivity
(Elsevier Science Ltd, http://www.elsevier.com/locate/bmc, 2011)
The investigation of Tylosema esculentum (Morama) husks, cotyledons, and tuber yielded griffonilide 2,
compound 1, griffonin 3, gallic acid 4, protocatechuic acid 5, b-sitosterol 6, behenic acid 7, oleic acid 8,
sucrose ...
An efficient synthesis of flavans from salicylaldehyde and acetophenone derivatives
(Elsevier Science Ltd, http://www.elsevier.com/locate/tetlet, 2011)
An efficient total synthesis of flavans from the reactions of salicylaldehyde and acetophenone derivatives is reported. The synthesis involves preparation of chalcones through an aldol reaction followed by reduction of ...
Pollution implications of Save River water from weathering and dissolution of metal hosting minerals at Dorowa phosphate mine, Zimbabwe
(Elsevier Science Ltd, http://www.elsevier.com/locate/pce, 2010)
The study set out to determine the weathering and dissolution of metal hosting minerals at Dorowa for purposes of deducing pollution potential to the nearby Save River. Phosphate rock is mined at Dorowa for
the production ...
Heterogeneous crystallization and composition dependence of optical parameters in Sn–Sb–Bi–Se chalcogenides
(Springer, 2010)
Bulk samples of Sn10Sb20-xBixSe70 (0 B x B 8)
chalcogenide alloys were prepared by the conventional melt quenching technique. Thin films were prepared on wellcleaned
glass substrates by thermal evaporation technique. ...
Natural attenuation of mining pollutants in the transboundary Save River
(Elsevier Science Ltd, http://www.elsevier.com/locate/pce, 2011)
The objective of the study was to investigate the role played by the natural environment in protecting the
transboundary Save River from the impacts of metals derived from phosphate mining at Dorowa. The
study is a follow ...
Minerals that host metals at Dorowa Rock Phosphate Mine, Zimbabwe
(Bentham Open, http://www.benthamscience.com/open/tomj/index.htm, 2011)
This study set out to establish the major minerals at Dorowa and determine which of those are likely to host metals that may leach into surface and groundwater. This study comes after a preliminary assessment of the water ...
Analysis of the effects of kraal manure accumulation on soil nutrient status through time
(Academic Journals, 2010-11)
This study investigated the influence of the accumulation of animal wastes on the soils of active kraal sites through time. This investigation involved the sampling and analysis of the soils of kraals that had been in use ...