Browsing Natural and Agricultural Sciences by Title
Now showing items 560-579 of 2738
-
Damage to citrus and vegetables by Thaumatotibia leucotreta (Lepidoptera: Tortricidae) and prospects for control with entomopathogenic fungi
(North-West University (South Africa), 2020)Globally, orange is one of the major fruit crops contributing to nutrition and monetary income. False codling moth (FCM), Thaumatotibia leucotreta, is one of the major constraints of orange production. Before this study, ... -
Dark interactions beyond the Lambda-CDM model
(North-West University (South Africa), 2022)In this study, cosmological models are considered, where dark matter and dark energy are coupled and may exchange energy through non-gravitational interactions with one other. These interacting dark energy (IDE) models ... -
Data dependent choice of the tuning parameter for the modified bootstrap
(North-West University, 2004)It is the purpose of this study to investigate a procedure for estimating the tuning parameter, m, in the modified bootstrap (also known as the m-out-of-n bootstrap, the moon bootstrap or the m/n bootstrap). The procedure ... -
A database development for multi element concentrations of medicinal plants using instrumental Neutron Activation Analysis (INAA) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
(North-West University (South Africa), 2008)Medicinal plants are used by an estimated 80% of the population in developing countries for a wide range of health applications. The objective of this study is to develop a database for multi-element characterization of ... -
A decision making problem in the banking industry
(North-West University, 2007)The main categories of assets held by banks are risky assets (loans and intangible assets), Treasuries (bonds issued by the national Treasury) and reserves. Our contribution models how decisions about the allocation of ... -
Decision-making tools for establishment of improved monitoring of water purification processes
(North-West University (South Africa), 2020)Source water is becoming a scarce resource in South Africa, especially with the extreme periods of drought that the country has faced the last few years. Continuous pollution of rivers and dams is drastically deteriorating ... -
Defining and calculating steric strain in the first step of the dissociative alkene metathesis mechanism using Grubbs 1-type catalysts
(North-West University (South Africa), Potchefstroom Campus, 2016)During the dissociative alkene metathesis mechanism, a phosphine ligand dissociates from the ruthenium metal of a Grubbs 1-type catalyst leading to the active 16-electron Grubbs 1-type catalyst with an open coordination ... -
Degradation of glyphosate using environmental lignocellulolytic fungal isolates and extracellular enzymes
(North-West University (South Africa), 2023)Glyphosate is the most used herbicide in the world. Having been detected in food and water systems, glyphosate raises several concerns around food safety and its environmental impact. Recent studies have found an increase ... -
Delineation of Groundwater Region 65 : Zululand Coastal Plain Aquifer, KwaZulu-Natal
(North-West University (South Africa) , Potchefstroom Campus, 2015)The Zululand Coastal Aquifer or Groundwater Region 65 is the largest primary porosity aquifer in South Africa. Despite the veneer of well rounded, medium size sand grains, the subsurface environment comprises geological ... -
Dependence of natural fragmentation characteristics of a casing material on explosive parameters
(North-West University (South Africa), 2020)Since the prediction of warhead performance is crucial in the early stages of design and the scaling of this procedure is complex and expensive, it is beneficial to have measurable parameters in one optimal model to improve ... -
Design and analysis for efficient simulation in petrochemical industry
(North-West University, 2008)Building an industrial simulation model is a very time and cost intensive exercise because these models are large and consist of complicated computer code. Fully understanding the relationships between the inputs and the ... -
Design and biological evaluation of arylated polyethylene glycol gel containing acarbose
(North-West University (South Africa), 2018)"Abstract not copied" -
Design and In vitro analysis of polyethylene glycol based multidrug delivery systems for combination therapy in the treatment of Breast Cancer
(North-West University (South Africa), 2018)Polymer hydrogels are known to be excellent drug delivery biomaterials for unconventional cancer therapy. The polymer hydrogel was prepared via the free-radical polymerization of acrylamide (AAm) in the presence of poly ... -
Design and optimisation of new beamlines for iThemba laboratory for accelerator based sciences (iThemba LABS)
(North-West University (South Africa), 2002)The facilities at iThemba LABS are used for basic and applied research, treatment of patients with proton and neutron beams and the production of radioisotopes for hospitals and industry. The laboratory operates a 6 MV ... -
Design and optimisation of new beamlines for iThemba laboratory for accelerator based sciences (iThemba LABS0
(North-West University (South Africa), 2002)The facilities at iThemba LABS are used for basic and applied research, treatment of patients with proton and neutron beams and the production of radioisotopes for hospitals and industry. The laboratory operates a 6 MV ... -
Design of a negative helium ion injection system for the 6MV en tandem accelerator at iThemba laboratory for accelerator based sciences
(North-West University (South Africa), 2008)Sufficient production of negative helium ions for acceleration of alpha particles is of great interest in tandem electrostatic accelerator facilities. The Tandem accelerator at iThemba LABS makes use of an 860A Cs-Sputtering ... -
The design of a physical protection system for the 444TBq ⁶⁰Co Irradiation Source at the centre for applied radiation science and technology, Mafikeng, South Africa
(North-West University (South Africa), 2017)The accelerated technological change experienced by the world at the outset of the twenty-first century including technologies used in the nuclear field can pose serious risks to public health, property and the environment ... -
The design of a radon chamber for the calibration of radon monitors at the Centre for Applied Radiation Science and Technology, Mafikeng, South Africa
(North-West University (South Africa), 2019)The radon chamber was designed at CARST. The purpose of the radon chamber design was solely for the calibration of radon monitors in this study. The radon chamber, rectangular in shape was manufactured with a Perspex ... -
Design of a waste to landfill minimisation model for South Africa's mining towns
(North-West University (South Africa), 2018)The study was carried out in order to design a waste to landfill minimisation model for South Africa's mining towns. The study area covered four provinces and for each province a single local municipality with a major ... -
Design of an e–registration prototype using HCI principles : with specific reference to tax registration
(North-West University, 2013)The aim of the research was: *to gain a better understanding on the concepts of Human-computer interaction (HCI) in general and the application of HCI principles in this field; to gain a better understanding of electronic ...
