Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 998-1017 of 4854
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Dactylogyrids (Platyhelminthes: Monogenea) from Sudanese Labeo spp., with a description of Dogielius sennarensis n. sp. and a redescription of Dogielius fl osculus Guégan, Lambert & Euzet, 1989
(Institute of Parasitology, 2018)Dactylogyrid monogeneans of Labeo horie Heckel, 1847 and L. niloticus (Linnaeus, 1758) (Cyprinidae) were surveyed at two sites on the River Nile in Sudan. The present study reports the presence of ten species of Dactylogyrus ... -
Dactylogyrus spp. (Monogenea, Dactylogyridae) from the Gills of Enteromius spp. (Cypriniformes, Cyprinidae) from the Limpopo Province, South Africa with descriptions of three new species
(Springer, 2020)Background Monogenean parasites of the genus Dactylogyrus Diesing, 1850 parasitize mostly gills of cyprinoids hosts. Of 100 species currently known from African continent, approximately 35 have been described from Enteromius ... -
Damring formation during rotary kiln chromite pre-reduction: effects of pulverized carbonaceous fuel selection and partial pellet melting
(Springer, 2018)Electricity consumption is the largest cost contributing factor in the production of ferrochrome. Currently the pelletized chromite pre-reduction process (solid-state reduction of chromite) is the process option with the ... -
Darboux transformation and solitons for an integrable nonautonomous nonlinear integro-differential Schrödinger equation
(World Scientific, 2017)By modifying the scheme for an isospectral problem, the non-isospectral Ablowitz-Kaup-Newell-Segur (AKNS) hierarchy is constructed via allowing the time varying spectrum. In this paper, we consider an integrable nonautonomous ... -
Data on the optimisation of a solid phase extraction method for fractionating estrogen metabolites from small urine volumes
(Elsevier, 2020)Certain estrogen metabolites have been implicated in the pathophysiology of breast cancer. Moreover, the estrogen metabolite profiles of healthy women and those with (a high risk of) breast cancer differ significantly. The ... -
Data transformations and goodness-of-fit tests for type-II right censored samples
(Springer, 2015)We suggest several goodness-of-fit (GOF) methods which are appropriate with Type-II right censored data. Our strategy is to transform the original observations from a censored sample into an approximately i.i.d. sample ... -
The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project
(Wiley, 2017)The PREDICTS project—Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)—has collated from published studies a large, reasonably representative database of comparable samples ... -
DC electrical conductivity of nano-composite polystyrene–titanium– arsenate membrane
(ELSEVIER, 2013)In continuation to our previous work with nano-composite polystyrene–titanium–arsenate (PS–Ti–As), we further extended the characterization by means of DSC, TEM and mercury porosimetry measurements. In addition to the ... -
DDT and malaria prevention: addressing the paradox
(Superintendent of Documents, 2011)Background The debate regarding dichlorodiphenyltrichloroethane (DDT) in malaria prevention and human health is polarized and can be classified into three positions: anti-DDT, centrist-DDT, pro-DDT. Objective We ... -
DDT contamination from indoor residual spraying for malaria control
(Elsevier, 2010) -
DDT exposure of frogs: a case study from Limpopo Province, South Africa
(Elsevier, 2016)Amphibians are globally under pressure with environmental contaminants contributing to this. Despite caution aired more than 80 years ago of threats posed to amphibians by DDT spraying for disease vector control, no data ... -
DDT residues in water, sediment, domestic and indigenous biota from a currenlty DDT-sprayed area
(Elsevier Science Ltd, 2009) -
DDTs and other organochlorine pesticides in tissues of four bird species from the Rift Valley region, Ethiopia
(Elsevier, 2017)Despite the presence of a wide variety and number of birds, there is exceedingly little data on organochlorine pesticide (OCP) residues in birds inhabiting in Africa. In the present study, concentrations of dichlorodiphe ... -
Deception improves time trial performance in well-trained cyclists without augmented fatigue
(Wolters Kluwer, 2018)Purpose To investigate the effects of feedback, in the form of a virtual avatar paced at 100% and 102% of baseline performance, on neuromuscular fatigue after a 4-km cycling time trial (TT). We hypothesized that improved ... -
Decomposing blazar spectra into lepto‐hadronic emission components
(Wiley, 2018)The recently reported coincidences between high‐energy neutrino events and major blazar outbursts reinforce the relevance of lepto‐hadronic emission models for blazars. We study the influence of physical parameters on the ... -
Decomposition of subtropical fruit tree leaf litter at Nelspruit, South Africa
(Taylor & Francis, 2015)There is limited information about the decomposition of leaf litter from subtropical fruit trees despite their potential for managing soil fertility. The aim of this study was to quantify the effect of quality on decomposition ... -
Deep-brain stimulation associates with improved microvascular integrity in the subthalamic nucleus in Parkinson's disease
(Elsevier, 2015)Deep brain stimulation (DBS) of the subthalamic nucleus (STN) has become an accepted treatment for motor symptoms in a subset of Parkinson's disease (PD) patients. The mechanisms why DBS is effective are incompletely ... -
Deeper H.E.S.S. observations of Vela Junior (RX J0852.0-4622): morphology studies and resolved spectroscopy
(EDP Sciences, 2018)Aims. We study γ-ray emission from the shell-type supernova remnant (SNR) RX J0852.0−4622 to better characterize its spectral properties and its distribution over the SNR. Methods. The analysis of an extended High Energy ... -
Deeper knowledge of shallow waters: reviewing the invertebrate fauna of southern African temporary wetlands
(Springer, 2019)Temporary lentic wetlands are becoming increasingly recognised for their collective role in contributing to biodiversity at the landscape scale. In southern Africa, a region with a high density of such wetlands, information ...
