Browsing Faculty of Natural Sciences by Title
Now showing items 1-20 of 620
-
16 S rDNA primers and the unbiased assessment of thermophile diversity
(Portland Press, 2004)Our understanding of thermophile diversity is based predominantly on PCR studies of community DNA. ‘Universal’ and domain-specific rRNA gene PCR primers have historically been used for the assessment of microbial diversity ... -
Abalone farming in South Africa: an overview with perspectives on kelp resources, abalone feed, potential for on-farm seaweed production and socio-economic importance
(Elsevier, 2006)The South African abalone cultivation industry has developed rapidly and is now the largest producer outside Asia. With a rapid decline in wild abalone fisheries, farming now dominates the abalone export market in South ... -
Abstractions for designing and evaluating communication bridges for people in developing regions
(ACM, 2010)This paper describes two novel abstractions that help soft- ware engineers work in developing regions to align social and technical factors when building communication systems. The abstractions extend two concepts familiar ... -
Abundance and species composition of non-geniculate coralline red algae epiphytic on the South African populations of the rocky shore seagrass Thalassodendron leptocaule M.C. Duarte, Bandeira & Romeiras
(Elsevier, 2013)Seagrasses support a great diversity of epiphytic organisms and new research has shown that non-geniculate coralline red algae are important occupiers of space on the fronds of seagrasses. Except for a few scant records, ... -
Accuracy of magnetic resonance imaging in detecting lumbo-sacral nerve root compromise: A systematic literature review
(BioMed Central, 2016)Background: MRI is considered to be the diagnostic tool of choice in diagnosing nerve root compromise among patients presenting with clinical suspicion of lumbo-sacral radiculopathy. There exists controversy among researchers ... -
Acoustic observations of jellyfish in the Namibian Benguela
(Inter-Research, 2001)Multi-frequency acoustic data (18, 38 and 120 kHz) were collected in conjunction with pelagic trawl sampling for gelatinous macrozooplankton during a cruise to the Namibian Benguela in September 1999. Sampling focused ... -
Active Principles of Tetradenia riparia; II. Antispasmodic Activity of 8(14), 15-Sandaracopimaradiene-7α, 18-diol
(Georg Thieme Verlag, 1987)Tetradenia riparia is one of the most popular medicinal plants in Rwanda. Previously, several new substances have been isolated from the leaves, including a new diterpenediol, i.e. 8(14),15-sandaracopimaradiene-7α,18-diol. ... -
Acute pharmacokinetics of first line anti-tuberculosis drugs in patients with Pulmonary Tuberculosis and in patients with Pulmonary Tuberculosis co-infected with HIV
(David Publishing, 2011)The aim of this study was to compare the pharmacokinetics of antituberculosis drugs in patients with pulmonary tuberculosis (PTB) and in patients with PTB and HIV during the first 24 h of treatment. Designed as a ... -
Acylphloroglucinol derivatives from the South African helichrysum niveum and their biological activities
(MDPI, 2015)Abstract: Phytochemical investigation of aerial parts of Helichrysum niveum (H. niveum) using different chromatographic methods including semi-preparative HPLC afforded three new (1–3) and six known (4–10) acylphloroglucinols ... -
Adapting x264 to asynchronous video telephony for the Deaf
(Telkom, 2008)Deaf people want to communicate remotely with sign language. Sign language requires sufficient video quality to be intelligible. Internet-based real-time video tools do not provide that quality. Our approach is to use ... -
Additive antibacterial activity of naringenin and antibiotic combinations against multidrug resistant Staphylococcus aureus
(Academic Journals, 2015)Methicillin-resistant Staphylococcus aureus has been causing numerous problems in the health care sector. This is mainly due to its ability to develop resistance to a number of antibiotics used to treat staphylococcal ... -
Affective gesture feedback Instant Messaging on handhelds
(Institute of Electrical and Electronics Engineers, Inc., 2004)Mobile devices and mobile networks are becoming more data-centric (evident in Japanese I-mode) even as mobile network voice Average Revenue Per User are declining, new stream of data services are required which must take ... -
The African Coelecanth genome provides insights into tetrapod evolution
(Macmillan Publishers, 2013)The discovery of a living coelacanth specimen in 1938 was remarkable, as this lineage of lobe-finned fish was thought to have become extinct 70 million years ago. The modern coelacanth looks remarkably similar to many of ... -
Agent-based context-aware healthcare information retrieval using DROPT approach
(International Science Press, 2012)As the volume of information available on the Web information systems is growing continuously, browsing this content becomes a tedious task given the presentation of data that does meet user's aims and needs. In this paper, ... -
Alteration of Bax-to-Bcl-2 ratio modulates the anticancer activity of methanolic extract of Commelina benghalensis (Commelinaceae) in Jurkat T cells
(Academic Journals, 2008)Stem extracts of Commelina benghalensis (Linn.), although not extensively documented, are frequently used in traditional medicine for the treatment of ailments such as skin malformations and outgrowths. Accordingly, the ... -
Amino acids 1055 to 1192 in the S2 Region of severe acute respiratory syndrome Coronavirus S Protein induce neutralizing antibodies: Implications for the development of vaccines and antiviral agents
(American Society for Microbiology, 2005)The spike (S) protein of the severe acute respiratory syndrome coronavirus (SARS-CoV) interacts with cellular receptors to mediate membrane fusion, allowing viral entry into host cells; hence it is recognized as the primary ... -
Amorphous Pt@dCu/CNT catalyst for methanol elextrooxidation
(South African Chemical Institute (SACI), 2013)A multi-walled carbon nanotube-supported, Pt decorated nano-sized amorphous PdCu alloy cores (denoted as Pt@PdCu/CNT) catalyst with lower Pt loading is synthesized via a galvanic displacement reaction. The structure is ... -
Amphibious Horses: Beings in the Littoral and Liminal Contact Zones
(2013)Horses galloping in littoral zones are represented as embodying wildness, freedom and a prelapsarian quality. Roy Campbell’s ‘The Horses of the Camargue’ includes themes which recur in texts about littoral horses: the ... -
An unconditionally stable nonstandard finite difference method applied to a mathematical model of HIV infection
(De Gruyter Open, 2013)We formulate and analyze an unconditionally stable nonstandard finite difference method for a mathematical model of HIV transmission dynamics. The dynamics of this model are studied using the qualitative theory of dynamical ... -
Anaemia – a pale ale?
(Cogent OA, 2017)Despite some modest improvements described recently, anaemia remains a significant global public health concern affecting both developed and developing countries. It affects a quarter of the global population, including ...
