Browsing Natural and Agricultural Sciences by Title
Now showing items 1278-1297 of 2738
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H-selfadjoint roots of H-selfadjoint matrices and H-polar decompositions over the quaternions
(North-West University (South Africa), 2022)All vector spaces in this thesis will be endowed with an indefinite inner product defined by an invertible Hermitian matrix H. We study cases where the H has either complex or quaternion entries depending on the context. We ... -
A hadronic synchrotron mirror model for blazar - Application to 3C279
(North-West University (South Africa), 2021)Blazars are a class of Active Galactic Nuclei (AGN) that are radio loud and have a small angle between the jet and the observer's line of sight, found in the centres of elliptical galaxies. In some cases, aring events ... -
Haemoprotozoans infecting near-shore catsharks (Elasmobranchii: Scyliorhinidae) off the Western Cape
(North-West University (South Africa), 2021)Little is known on blood parasites or haemoprotozoans (haemogregarines and trypanosomes) infecting elasmobranchs worldwide, and knowledge on these parasites in South African cartilaginous fishes is even more limited. Even ... -
Hail nowcasting over the South African Highveld
(North-West University (South Africa), 2019)Hailstorm is one of the main meteorological phenomena that signify sources of damage to vehicles, property, infrastructure and agriculture over the Highveld. This event poses a strain to societies and is one of the costliest ... -
Haplotipe–analise van die fenielalanienhidroksilase–lokus in families met fenielketonurie
(Potchefstroom University for Christian Higher Education, 1989)Cloning of a full-length human cDNA for phenylalanine hydroxylase (PAH) has led to major advances In the application of recombinant DNA techniques to the study of classical phenylketonuria (PKU) I a common autosomal recessive ... -
The health and economic benefits of interventions to reduce residential solid fuel burning on the Highveld
(North-West University, 2018)Due to its complicated history, South Africa faces air quality problems associated with both developed and developing countries. On the one hand, industrial activities and high numbers of private vehicle ownership are ... -
Health assessment of fishes from coastal lakes on the east coast of South Africa
(North-West University (South Africa), Potchefstroom Campus, 2018)Kosi Bay located on the subtropical east coast of South Africa bordering the south of Mozambique is a unique Ramsar system that is composed of four interconnected, roughly circular lakes that is considered the most pristine ... -
Health clinic gardens in North-West Province, South Africa, as complex social-ecological systems
(North-West University (South Africa), 2016)The world’s urban population (54%) is currently increasing. The fastest growth rates are expected to occur in urban areas of Africa and Asia. Since urban areas will continue to expand, ecological studies should also take ... -
A health hazard evaluation of workers exposed to solvents during the re-furbishing of chemical rail-tankers
(North-West University, 2003)This study was aimed at evaluating the health hazards of workers exposed to solvents during the re-furbishing of chemical rail-tankers. The process of re-furbishing comprises of three main and sub processes that requires ... -
Heart rate and systolic blood pressure response to workload during an incremental sub–maximal exercise test in healthy individuals
(North-West University, 2012)Healthcare practitioners, whom perform accurate sub-maximal exercise tests in healthy individuals, need to understand the physiological demands and normal cardiovascular (CV) responses with exercise. Exercise testing ... -
Heavy metal pollution in soil and plants from a mining area in the North West Province, South Africa
(North-West University (South Africa), 2019)South Africa is a mining country with a huge reserve of large deposits of gold, platinum, and coal, among others. However, contamination of soils and plants by heavy metals within the mining environment in South Africa has ... -
Hemodinamiese en elektrofisiologiese veranderinge by verskillende proefdiere tydens epoksiscillirosidien vergiftiging
(North-West University (South Africa), 1971)"Abstract not copied" -
Hemodinamiese veranderinge as gevolg van eksperimentele hartversaking by skape soos waargeneem met 99m.-Technetium
(North-West University (South Africa), 1978)1. Gousiekte is a congestive cardiomyopathy that occurs in ruminant animals. It is characterised by a latent period of 2-6 weeks followed by a sudden death. Typical symptoms such as arrhythmia, systolic murmurs and ... -
Hemodinamiese veranderings tydens hartglikosied vergiftiging by skape met spesiale verwysings na epoksiscillirosidien
(North-West University (South Africa), 1977)Cardiac glycosides are extensively used as drugs in the treatment of cardiac failures. Unfortunately it often causes toxicity due to over dosage or suicidal attempt. In animals it is one of the most common causes of ... -
Herbaceous plant diversity responses to various treatments of fire and herbivory in sodic patches of a semiarid riparian ecosystem
(2014)Understanding relationships between large herbivores and plant species diversity in dynamic riparian zones, and more specifically sodic zones, is critical to biodiversity conservation. Sodic patches form an integral part ... -
Herbaceous species diversity, redundancy and resilience of Mopaneveld across different land-uses
(North-West University (South Africa), 2016)Savanna ecosystems are under increasing arthropogenic pressure. In semi-arid Mopaneveld, few studies have aimed to quantify and evaluate the extent to which anthropogenic disturbances affect plant diversity and function ... -
Herpetofaunal survey of the Khaudum–Ngamiland dispersal area in Namibia
(North-West University (South Africa), 2023)An extensive Herpetofaunal survey of three under researched areas in North–eastern Namibia (all forming part of the Khaudum Ngamiland dispersal area) was conducted. The areas in question were the Nyae Nyae conservancy, ... -
Heterologous expression and functional characterization of a Truncated U ridine Kinase family protein from Arabidopsis thaliana
(North-West University (South Africa), 2017)Adenylate cyclases (ACs) are enzymes that convert adenine-5'-triphosphate (ATP) to cyclic 3', 5'-adenosine monophosphate (cAMP). Virtually in nature, it has been found that cAMP has an important role in chemical signaling ... -
Hinduism : the double edged sword of environmentalism
(2014)The purpose of the study was to draw parallels between the Hindu religious teachings and environmental sustainability. A literature review on Hindu teachings on the environment as well as the practical application thereof ... -
The historical and seasonal distribution of schistosomiasis transmitting vectors in the Mpumalanga province, South Africa
(North-West University (South Africa), 2023-10)Schistosomiasis is a parasitic disease transmitted by freshwater host snails and is prevalent in tropical and subtropical regions. The spatial-temporal focal distribution and transmission of schistosomiasis are determined ...
