Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 2511-2530 of 4817
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L-Carnitine and long-chain acylcarnitines are positively correlated with ambulatory blood pressure in humans: the SABPA study
(Springer, 2013)The prevalence of hypertension in sub-Saharan Africa is increasing rapidly, and treatment remains challenging. Although the use of l-carnitine in treatment has received much attention, studies reporting on physiological ... -
Labellicula lecohuiana, a new epizoic diatom species living on green turtles in Costa Rica
(Schweizerbart and Borntraeger Science Publishers, 2017)A new Labellicula species, L. lecohuiana Majewska & Van de Vijver sp. nov., was observed living epizoically on the carapaces of green sea turtles in Costa Rican coastal waters. The new species, showing a narrowly lanceolate ... -
A laboratory approach for characterizing chronic fatigue: what does metabolomics tell us?
(Springer, 2019)Introduction Manifestations of fatigue range from chronic fatigue up to a severe syndrome and myalgic encephalomyelitis. Fatigue grossly affects the functional status and quality of life of affected individuals, prompting ... -
Laboratory-scale simulations with hydrated lime and organic polymer to evaluate the effect of pre-chlorination on motile Ceratium hirundinella cells during conventional water treatment
(Water Research Commission, 2016)Algal genera such as Carteria, Chlamydomonas, Chlorogonium, Cryptomonas, Ceratium, Peridinium and Euglena are motile and may disrupt unit processes and cause water treatment problems. Algal species belonging to these ... -
Lack of phylogeographic structure in the endangered Pickersgill’s Reed Frog; Hyperolius pickersgilli (Raw, 1982)
(Taylor & Francis, 2019)The Endangered Pickersgill’s Reed Frog (Hyperolius pickersgilli) is endemic to South Africa and restricted to the KwaZulu-Natal (KZN) coast. The natural habitat of H. pickersgilli is limited to fragmented patches of coastal ... -
Lactate shuttles in neuroenergetics: homeostasis, allostasis and beyond
(Frontiers Media, 2017)Understanding brain energy metabolism—neuroenergetics—is becoming increasingly important as it can be identified repeatedly as the source of neurological perturbations. Within the scientific community we are seeing a shift ... -
Land take and the effectiveness of project screening in Environmental Impact Assessment: findings from an empirical study
(Elsevier, 2017)Land take is emerging as a global environmental concern, and is particularly critical in intensively developed and land-scarce regions. This paper seeks to understand the effectiveness of the screening stage of Environmental ... -
Land use and land cover changes along the China-Myanmar oil and gas pipelines: monitoring infrastructure development in remote conflict-prone regions
(Public Library of Science, 2020)Energy infrastructures can have negative impacts on the environment. In remote and / or sparsely populated as well as in conflict-prone regions, these can be difficult to assess, in particular when they are of a large ... -
Land use and transportation integration within the greater area of the North West University (Potchefstroom Campus), South Africa: problems, prospects and solutions
(WIT Press, 2014)The main problem that this paper will address is the traffic congestion within the geographical area adjoining the NWU (Potchefstroom Campus). Therefore, the existing traffic patterns and land development tendencies are ... -
Land use/land cover change and implications for ecosystems services in the Likangala River Catchment, Malawi
(Elsevier, 2016)Likangala River catchment in Zomba District of Southern Malawi is important for water resources, agriculture and provides many ecosystem services. Provisioning ecosystem services accrued by the populations within the ... -
Land-use suitability modelling as an input for spatial planning in Tlokwe local municipality, North-West province, South Africa
(Department of Urban and Regional Planning, University of the Free State, Bloemfontein, South Africa, 2010) -
Landscape functionality of plant communities in the Impala Platinum mining area, Rustenburg
(Elsevier, 2012)The tremendous growth of the platinum mining industry in South Africa has affected the natural environment adversely. The waste produced by platinum mineral processing is alkaline, biologically sterile and has a low ... -
Landscape history, time lags and drivers of change: urban natural grassland remnants in Potchefstroom, South Africa
(Springer, 2016)Context The history of the landscape directly affects biotic assemblages, resulting in time lags in species response to disturbances. In highly fragmented environments, this phenomenon often causes extinction debts. ... -
Language Independent Search in MediaEval's Spoken Web Search Task
(Elsevier Ltd., 2014)In this paper, we describe several approaches to language-independent spoken term detection and compare their performanceon a common task, namely “Spoken Web Search”. The goal of this part of the MediaEval initiative is ... -
Large sample behavior of the Bernstein copula estimator
(Elsevier, 2012)Bernstein polynomial estimators have been used as smooth estimators for density functions and distribution functions. The idea of using them for copula estimation has been given in Sancetta and Satchell (2004). In the ... -
Large sample properties of nonparametric copula estimators under bivariate censoring
(Taylor & Francis, 2016)A new nonparametric estimator is proposed for the copula function of a bivariate survival function for data subject to random right-censoring. We consider two censoring models: univariate and copula censoring. We show ... -
Large-scale sugarcane farmers' knowledge and perceptions of Eldana saccharina Walker (Lepidoptera: Pyralidae), push–pull and integrated pest management
(Elsevier, 2014)A push–pull strategy for controlling Eldana saccharina Walker is being promoted as part of an area-wide integrated pest management (AW-IPM) programme in the South African sugar industry. Understanding farmers' perceptions ... -
The larva of Schismaderma carens (Smith, 1849) (Anura: Bufonidae): a redescription
(ISSCA, 2017)We describe the outer morphology of Schismaderma carens larvae in greater detail than previous studies, with special attention to the histology of the unusual head fold in this taxa. The oral cavity is described for the ... -
Laser assisted solid state reaction for the synthesis of ZnS and CdS nanoparticles from metal xanthate
(Elsevier, 2014)Nanoparticles of CdS and ZnS were produced by a nanosecond laser using zinc (II) and cadmium (II) complexes of ethyl xanthate. Laser pulses with a peak wavelength of 355 nm, pulse repetition rate of 10 Hz, and pulse ... -
Laser induced and controlled chemical reaction of carbon monoxide and hydrogen
(AIP, 2011)Bimolecular chemical reaction control of gaseous CO and H2 at room temperature and atmospheric pressure, without any catalyst, using shaped femtosecond laser pulses is presented. High intensity laser radiation applied to ...
