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Browsing by Author "Land, K"

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Inkjet-printed conductive features for rapid integration of electronic circuits in centrifugal microfluidics

Author: Kruger, J ; Smith, S ; Land, K ; du Plessis, M ; Joubert, T-H Date: May 2015 This work investigates the properties of conductive circuits inkjet-printed onto the polycarbonate discs used in CD-based centrifugal microfluidics, contributing towards rapidly prototyped electronic systems in smart ubiquitous biosensors, ... Read more
Inkjet-printed silver tracks on different paper substrates

Author: Joubert, T-H ; Bezuidenhout, PH ; Chen, H ; Smith, S ; Land, K Date: Aug 2015 Inkjet printing is a widely used patterning method in industrial and scientific applications, and has also drawn attention in the field of printed electronics in recent years [1]. In this work, conductive silver tracks were achieved by inkjet ... Read more
A lensless, automated microscope for disease diagnostics

Author: Hugo, S ; Naidoo, T ; Swart, H ; Potgieter, S ; Van Rooyen, P ; Land, K Date: Mar 2012 Optical microscopy is widely accepted as one of the gold standards in disease diagnosis. However, factors such as cost and the need for a trained eye limit the prevalence of such equipment, particularly in resource-limited areas such as rural ... Read more
A lensless, automated microscope for disease diagnostics

Author: Hugo, S ; Naidoo, T ; Swart, H ; Potgieter, S ; Van Rooyen, P ; Land, K Date: Sep 2011 Microscopy is widely accepted as one of the gold standards in disease diagnosis. However, factors such as cost and the need for a trained eye limit the potential usefulness of such equipment, particularly in resource-limited areas such as ... Read more
Low cost fabrication and assembly process for re-usable 3D polydimethylsiloxane (PDMS) microfluidic networks

Author: Land, K ; Mbanjwa, MB ; Govindasamy, K ; Korvink, JG Date: Sep 2011 A method to easily manufacture and assemble a polydimethylsiloxane (PDMS) based microfluidic device is described. The method uses low cost materials and reusable laser cut polymethyl methacrylate (PMMA) parts. In addition, the thickness of ... Read more
Microfluidic devices for biological applications

Author: Potgieter, S ; Land, K ; Kotze, L ; Sparrow, R Date: 2010 Microfluidics is a multi-disciplinary field that deals with the behaviour, control and manipulation of fluids constrained to sub-millilitre volumes. It is proving to be a useful tool for biological studies, affording advantages such as reduced ... Read more
Modelling and optimization of a deformable mirror for laser beam control

Author: Loveday, Philip W ; Long, Craig S ; Forbes, A ; Land, K Date: Mar 2008 An intra-cavity adaptive mirror is required to compensate for time-dependent phase aberrations to the laser beam, such as those caused by thermal lensing. A piezoelectric unimorph design can provide a small, low-cost deformable mirror for ... Read more
New microfluidic platform for life sciences in South Africa

Author: Hugo, S ; Land, K Date: Oct 2012 Microfluidic systems provide the ideal platform on which to develop point-of-care (POC) diagnostic devices. A new microfluidic platform, based on centrifugal microfluidic principles, is currently being developed at the CSIR, with the aim ... Read more
Novel passive normally closed microfluidic valve

Author: Land, K ; Schneider, F ; Potgieter, S ; Korvink, JG Date: Sep 2009 Microfluidic systems require numerous control valves in order to function properly. These valves form the basic unit of fluid handling within the microfluidic system. Many different valves have been designed and manufactured, both active and ... Read more
Numerical modelling of a thin deformable mirror for laser beam control

Author: Long, Craig S ; Loveday, Philip W ; Forbes, A ; Land, K Date: Jan 2010 For intra-cavity laser beam control, a small, low-cost deformable mirror is required. This mirror can be used to correct for time- dependent phase aberrations to the laser beam, such as those caused by thermal expansion of materials. A ... Read more
Paper based microfluidic devices for environmental diagnostics

Author: Govindasamy, K ; Potgieter, S ; Kumar, S ; Land, K ; Muzenda, E Date: Sep 2012 Microfluidics has found widespread application in the fields of molecular biology, DNA analysis and most recently, point of care diagnostics. We present a paper based microfluidic device for rapid, in-the-field detection of pathogenic bacteria ... Read more
Paper-based smart microfluidics for education and low-cost diagnostics

Author: Smith, S ; Moodley, K ; Govender, Ureshnie ; Chen, H ; Fourie, L ; Ngwenya, S ; Kumar, S ; Mjwana, P ; Cele, H ; Mbanjwa, MB ; Potgieter, S ; Joubert, T-H ; Land, K Date: Nov 2015 Current centralised healthcare models pose many challenges, particularly for developing countries such as South Africa, where travel and time costs make it difficult for patients to seek healthcare, even when urgently needed. To address this ... Read more
Plug-and-play paper-based toolkit for rapid prototyping of microfluidics and electronics towards point-of-care diagnostic solutions

Author: Smith, S ; Moodley, K ; Land, K Date: Nov 2015 We present a plug-and-play toolkit for the rapid assembly of paper-based microfluidic and electronic components for quick prototyping of paper-based components towards point-of-care diagnostic solutions. Individual modules, each with a specific ... Read more
Polymer microcantilevers for water quality monitoring

Author: Ojijo, Vincent O ; Kumar, S ; De Villiers, M ; Chen, J ; Cele, H ; Land, K Date: Oct 2012 The microcantilever project aims to develop novel polymer based microcantilevers able to detect E.coli in water samples for use as a rapid diagnostic for on-site water quality monitoring. Read more
Promise of a microfluidic research network in South Africa: establishment of the base with the CSIR

Author: Land, K ; Potgieter, S ; Mbanjwa, M Date: Nov 2008 The CSIR is developing a new technology, broadly referred to as microfluidics, which deals with the behaviour, precise control and manipulation of fluids - with applications in areas such as micro fuel cells, disease detection, chemical and ... Read more
Rapid detection of E. Coli O157:H7 by IFAST and ATP bioluminescence assay for water analysis

Author: Ngamsom, B ; Fourie, L ; Tarn, MD ; Kumar, S ; Moodley, K ; Land, K ; Pamme, N Date: Oct 2016 The present investigation reports isolation and detection of E. coli O157:H7 employing a simple and portable microfluidic device based on immiscible filtration assisted by surface tension (IFAST) and adenosine triphosphate (ATP) bioluminescence ... Read more
Rapid development of paper-based fluidic diagnostic devices

Author: Smith, S ; Chen, H ; Moodley, K ; Joubert, T ; Land, K Date: Nov 2014 We present a method for rapid and low-cost development of microfluidic diagnostic devices using paper-based techniques. Specifically, the implementation of fluidic flow paths and electronics on paper are demonstrated, with the goal of producing ... Read more
Rapid manufacturing for microfluidics

Author: Land, K ; Hugo, S ; Mbanjwa, M ; Fourie, L Date: Oct 2012 Microfluidics refers to the manipulation of very small volumes of fluid. Microfluidics is at the forefront of developing solutions for drug discovery, diagnostics (from glucose tests to malaria and TB testing) and environmental diagnostics ... Read more
Rapid, low-cost prototyping of centrifugal microfluidic devices for effective implementation of various microfluidic operations

Author: Hugo, S ; Land, K ; Madou, M ; Kido, H Date: Oct 2013 The work presented here details the implementation of a centrifugal microfluidic platform – the first of its kind in South Africa – as a foundation for the development of various microfluidic operations. Microfluidic systems enable the precise ... Read more
Sample to answer visualization pipeline for low-cost point-of-care blood cell counting

Author: Smith, S ; Naidoo, T ; Davies, E ; Fourie, L ; Nxumalo, Z ; Swart, H ; Marais, P ; Land, K ; Roux, P Date: Feb 2015 We present a visualization pipeline from sample to answer for point-of-care blood cell counting applications. Effective and low-cost point-of-care medical diagnostic tests provide developing countries and rural communities with accessible ... Read more

Now showing items 17-36 of 40

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