Faculty of Natural Sciences: Recent submissions
Now showing items 1281-1300 of 2642
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Comparative analysis of tests used to assess sperm chromatin integrity and DNA fragmentation
(Blackwell Publishing Ltd, 2021)Male infertility has a complex etiology, and many times, the cause is unknown. While routine semen analysis provides an overview of basic semen parameters, such as sperm concentration, motility, viability and morphology, ... -
Effects of exogenous application of five antioxidants on vigour, viability, oxidative metabolism and germination enzymes in aged cabbage and lettuce seeds
(Elsevier B.V., 2021)Ageing induces modifications capable of compromising seed vigour and viability. This study investigated the effects of exogenous application of five antioxidants: ascorbic acid (AA), gallic acid (GA), reduced glutathione ... -
Association of XRCC1 and ERCC2 promoters’ methylation with chromatin condensation and sperm DNA fragmentation in idiopathic oligoasthenoteratozoospermic men
(Blackwell Publishing Ltd, 2021)The aim of the study was to investigate whether the promoter methylation of XRCC1 and ERCC2 genes is associated with sperm DNA fragmentation and chromatin condensation in idiopathic oligoasthenoteratozoospermic men. This ... -
H i intensity mapping with MeerKAT: 1/f noise analysis
(Oxford University Press, 2021)The nature of the time correlated noise component (the 1/f noise) of single dish radio telescopes is critical to the detectability of the H i signal in intensity mapping experiments. In this paper, we present the 1/f noise ... -
Exogenous 3,3′-diindolylmethane improves vanadium stress tolerance in brassica napus seedling shoots by modulating antioxidant enzyme activities
(MDPI, 2021)3,3′-diindolylmethane (DIM) belongs to a family of indole glucosinolate compounds that have been shown to improve Brassica napus growth through the modulation of reactive oxygen species when applied exogenously. The B. ... -
Total antioxidant capacity—Relevance, methods and clinical implications
(Blackwell Publishing Ltd, 2021)Oxidative stress is pre-empted by an adequate level of antioxidants, which scavenge oxidants when they are produced in excess by different sources, including leukocytes and immature spermatozoa. Enzymatic antioxidants, ... -
Evaluation of seminal oxidation–reduction potential in male infertility
(Blackwell Publishing Ltd, 2021)The role of oxidative stress in male infertility has been broadly recognised, and the search for a new marker to determine the redox environment in semen has gained considerable interest. Oxidation–reduction potential (ORP) ... -
Diagnostic value of routine semen analysis in clinical andrology
(Blackwell Publishing Ltd, 2021)Infertility is a major health issue affecting over 48.5 million couples around the world, with the male factor accounting for about 50% of the cases. The conventional semen analysis recommended by the World Health Organization ... -
Proteomics and metabolomics — Current and future perspectives in clinical andrology
(Blackwell Publishing Ltd, 2021)Proteomics and metabolomics are emerging as promising tools to investigate the molecular mechanisms associated with male infertility. Proteins and metabolites play a pivotal role in regulating the molecular pathways ... -
TUNEL assay—Standardized method for testing sperm DNA fragmentation
(Blackwell Publishing Ltd, 2021)Sperm DNA integrity is important for normal functions such as fertilization, implantation, pregnancy and fetal development. Sperm DNA fragmentation (SDF) is more common in infertile men and may be responsible for poor ... -
An update on the techniques used to measure oxidative stress in seminal plasma
(Blackwell Publishing Ltd, 2021)Reactive oxygen species (ROS) are produced in significant amounts by spermatozoa and leucocytes. They are necessary to carry out various physiological functions such as sperm capacitation, hyperactivation, acrosome reaction, ... -
PM2.5 chemical composition and geographical origin of air masses in Cape Town, South Africa
(Springer Science and Business Media Deutschland GmbH, 2021)PM2.5 in the indoor and outdoor environment has been linked in epidemiology studies to the symptoms, hospital admissions and development of numerous health outcomes including death. The study was conducted during April ... -
Binderless zeolite monoliths production with sacrificial biopolymers
(Elsevier, 2021)3D printing has emerged as an attractive way of formulating structured adsorbents, as it imparts lower manufacturing costs compared to hydraulic extrusion while also allowing for unprecedented geometric control. However, ... -
Expression of cyclin-dependent kinases and their clinical significance with immune infiltrates could predict prognosis in colorectal cancer
(Elsevier, 2021)Introduction: Colorectal cancer (CRC) is one of the most cancer-related mortalities worldwide and remains a major public health issue. Despite several attempts to develop promising therapies for CRC, its survival rate ... -
A mobile survey for collecting data from deaf people who use sign language for communication
(Institute of Electrical and Electronics Engineers Inc, 2021)Hearing researchers and practitioners might have encountered challenges in collecting data from Deaf people who mainly rely on sign language for communication. This could be due to language barriers and the non-user-friendly ... -
Molecularly imprinted polypyrrole sensors for the detection of pyrene in aqueous solutions
(Springer Nature, 2021)Recently, electrochemical sensors have emerged as tools for polyaromatic hydrocarbons (PAH) detection that are cost-effective, easy to produce and use, highly selective and sensitive, and with good reproducibility. Polypyrrole ... -
Investigation of groundwater salinity using geophysical and geochemical approaches: Heuningnes catchment coastal aquifer. Western Cape Province, South Africa
(Springer Science and Business Media Deutschland GmbH, 2021)Seawater intrusion is recognised as a major factor affecting the quality of groundwater in coastal aquifers around the world. To determine the occurrence and extent of saline groundwater intrusion prevailing in the Heuningnes ... -
In vitro comparison of the anti-proliferative effects of galenia africana on human skin cell lines
(MDPI, 2021)Malignant melanoma is the major cause of skin cancer-related deaths. Surgery in combina-tion with radiotherapy, immunotherapy or chemotherapy is used to eradicate cancer cells, however, this treatment option is limited by ... -
Starspot modelling of the TESS light curve of CVSO 30
(EDP Sciences, 2021)Aims. I aim to investigate whether the photometric variability in the candidate host star CVSO 30 can be explained by starspots. Methods. The Transiting Exoplanet Survey Satellite (TESS) light curve of CVSO 30 is separated ... -
Electronics of anion hot injection-synthesized te-functionalized kesterite nanomaterial
(MDPI, 2021)Metal chalcogenides such as copper zinc tin sulfide (CZTS) have been intensively studied as potential photovoltaic cell materials, but their viability have been marred by crystal defects and low open circuit potential (Voc) ...