Institutional Repository | North-West University | NWU: Recent submissions
Now showing items 8561-8580 of 35800
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A Toeplitz-like operator with rational symbol having poles on the unit circle. III. The adjoint
(Springer, 2019)This paper contains a further analysis of the Toeplitz-like operators Tω on Hp with rational symbol ω having poles on the unit circle that were previously studied in Groenewald (Oper Theory Adv Appl 271:239–268, ... -
Reverse flows within the pharmaceutical supply chain: a classificatory review from the perspective of end-of-use and end-of-life medicines
(Elsevier, 2019)The Pharmaceutical Supply Chain (PSC) is responsible for considerable environmental and product-value impacts. However, studies on the reverse flows of PSC do not capture the diverse routes of end-of-use and end-of-life ... -
Correlation of long-term cosmic-ray modulation with solar activity parameters
(IOP Publishing, 2019)In this work, we analyze the long-term cosmic-ray modulation observed by the Hermanus neutron monitor, which is the detector with the longest cosmic-ray record, from 1957 July. For our study we use the force-field approximation ... -
A new genus and species of the family Microdispidae (Acari: Heterostigmata) associated with Trinervitermes trinervoides (Sjöstedt) (Isoptera: Termitidae) from South Africa
(Magnolia Press, 2019)A new genus and species of termitophilous microdispid mites, Sidorchukdispus ekaterinae gen. nov. and sp. nov. (Acari: Prostigmata: Microdispidae), associated with termites, Trinervitermes trinervoides (Sjöstedt) (Isoptera: ... -
Diatoms associated with two South African kelp species: Ecklonia maxima and Laminaria pallida
(Taylor & Francis, 2019)Kelp forests are believed to host a large biomass of epiphytic fauna and flora, including diatoms, which constitute the base of aquatic food webs and play an important role in the transfer of energy to higher trophic levels. ... -
Facile immobilization of glucose oxidase onto gold nanostars with enhanced binding affinity and optimal function
(Royal Society, 2019)Gold nanoparticles provide a user-friendly and efficient surface for immobilization of enzymes and proteins. In this paper, we present a novel approach for enzyme bioconjugation to gold nanostars (AuNSs). AuNSs were modified ... -
A review on equine piroplasmosis: epidemiology, vector ecology, risk factors, host immunity, diagnosis and control
(MDPI, 2019)Equine Piroplasmosis (EP) is a tick-borne disease caused by apicomplexan protozoan parasites, Babesia caballi and Theileria equi. The disease is responsible for serious economic losses to the equine industry. It principally ... -
GIRRL power! Participatory Action Research for building girl-led community resilience in South Africa
(Sage, 2019)This article aims to crystallize the contributions of the Girls in Risk Reduction Leadership (GIRRL) Program in building resilient communities through the integration of adolescent girls into local level decision-making ... -
Key elements of an information security culture in organisations
(Emerald, 2019)Purpose The purpose of this paper is to report on a study that investigated the information security culture in organisations in South Africa, with the aim of identifying key aspects of the culture. The unique aspects for ... -
Molecular characterisation of Meloidogyne enterolobii and other Meloidogyne spp. from South Africa
(Springer, 2019)Identification of Meloidogyne spp. is challenging when using only the classical techniques since some species share similar characteristics. In this study, 37 Meloidogyne populations were obtained from four provinces in ... -
Biological control of the root-knot nematode Meloidogyne incognita on tomatoes and carrots by plant growth-promoting rhizobacteria
(Springer, 2019)In the current study 27 plant growth-promoting rhizobacteria (PGPR) strains were screened for biocontrol activity against Meloidogyne incognita on 6-week old carrot seedlings that were inoculated with a suspension of J2 ... -
A behavioral analysis of KdVB equation under the law of Mittag-Leffler function
(Elsevier, 2019)The literature on fluid dynamics shows that there still exist number of unusual irregularities observed in wave motions described by the Korteweg–de Vries equation, Burgers equation or the combination of both, called ... -
Integrating social values with other value dimensions: parallel use vs. combination vs. full integration
(Springer, 2019)The need to link different valuation methods, especially beyond disciplinary realms, has been discussed at least since the 1990s, and recently it has gained special attention. In the present contribution to this debate, ... -
Genetic comparisons of fall armyworm populations from 11 countries spanning sub-Saharan Africa provide insights into strain composition and migratory behaviors
(Nature, 2019)The recent discovery of fall armyworm (Spodoptera frugiperda, J.E. Smith) in Africa presents a significant threat to that continent’s food security. The species exhibits several traits in the Western Hemisphere that if ... -
Enhanced microbial hydrocarbon biodegradation as stimulated during field-scale landfarming of crude oil-impacted soil
(Elsevier, 2019)The study investigated microbial population dynamics and petroleum hydrocarbon degradation during 56-day landfarming bioremediation of crude oil-polluted soil at a Community in Niger Delta Nigeria. Landfarming involved the ... -
Efficacy of Bt Maize for control of Spodoptera frugiperda (Lepidoptera: Noctuidae) in South Africa
(Oxford Univ Press, 2019)Spodoptera frugiperda (J.E. Smith) is an invasive pest species that threatens maize production by small holder farmers in Africa. Bt maize that express Cry proteins have been used effectively for control of this pest in ... -
Goodness-of-fit tests for parametric specifications of conditionally heteroscedastic models
(Springer, 2020)We consider a goodness-of-fit test for certain parametrizations of conditionally heteroscedastic time series with unobserved components. Our test is quite general in that it can be employed to validate any given specification ... -
Summary of research paper published in Journal of Atmospheric Chemistry titled: Assessment of polar organic aerosols at a regional background site in southern Africa
(National Association for Clean Air, 2019)A recent paper reported GCxGC-TOFMS analysis used for the first time in southern Africa to tentatively characterise and semiquantify ~1 000 organic compounds in aerosols at Welgegund – a regional background atmospheric ... -
Indoor particulate matter concentration variations and associations with indoor/outdoor temperature in rural Limpopo
(National Association for Clean Air, 2019)The World Health Organization (WHO) reports that, worldwide, approximately 50% of all households and 90% of rural households burn solid fuels as a primary source of energy. In South Africa, ... -
South African Highveld concentrations of outdoor Total Gaseous Mercury
(National Association for Clean Air, 2019)It is well-known that the Highveld is one of the country's poorest air quality regions. This is due to the abundance of anthropogenic activities such as coal-fired power plants, mining, and cement production among others. ...
