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Browsing by Subject "Electron microscopy"

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Characterization of magnetite particles in shocked quartz by means of electron- and magnetic force microscopy: Vredefort, South Africa

Author: Cloete, M ; Hart, RJ ; Schmid, HK ; Drury, M ; Demanet, CM ; Sankar, KV Date: Nov 1999 Sub microscopic opaque particles from highly shocked granite-gneisses close to the core of the Vredefort impact structure have been investigated by means of micro-analytical techniques with high spatial resolution such as electron diffraction, ... Read more
Correlations between metal uptake in the soft tissue of Perna perna and gill filament pathology after exposure to mercury

Author: Gregory, MA ; George, RC ; Marshall, DJ ; Anandraj, A ; McClurg, TP Date: 2002 The accumulation of metal in soft tissues, filtration rate and gill filament morphology are correlated in the southern African rock mussel, Perna perna, during exposure to mercury (24 days) and recovery (24 days). The amount of Hg in soft ... Read more
An easy two-step microwave assisted synthesis of SnO2/CNT hybrids

Author: Motshekga, SC ; Kesavan Pillai, Sreejarani ; Ray, SS ; Jalama, K ; Krause, RWM Date: Nov 2011 Tin oxide (SnO2) - decorated carbon nanotube (CNT) heterostructures were synthesized by microwave assisted wet impregnation method. CNTs of three different aspect ratios were compared. The hybrid samples were characterized by powder X-ray ... Read more
Extension of the lifetime of tantalum filaments in the hot-wire (Cat) 3 Chemical Vapor Deposition process

Author: Knoesen, D ; Arendse, C ; Halindintwali, S ; Muller, T Date: Jan 2008 One of the prime components of a hot-wire (Cat) Chemical Vapor Deposition system is the filament used to pyro-catalytically crack the gases like silane. Burnt out tantalum filaments were studied to determine the possible improvement of lifetime ... Read more
Intracellular ice and cell survival in cryo-exposed embryonic axes of recalcitrant seeds of Acer saccharinum: an ultrastructural study of factors affecting cell and ice structures

Author: Wesley-Smith, J ; Berjak, P ; Pammenter, NW ; Walters, Chavon R Date: Mar 2014 Cryopreservation is the only long-term conservation strategy available for germplasm of recalcitrant-seeded species. Efforts to cryopreserve this form of germplasm are hampered by potentially lethal intracellular freezing events; thus, it is ... Read more
Morphology, thermal and dynamic mechanical properties of poly(lactic acid)/expandable graphite (PLA/EG) flame retardant composites

Author: Mngomezulu, ME ; Luyt, AS ; Mathew, Maya J Date: Dec 2017 This work reports on the effect of expandable graphite (EG) on the morphology, thermal and dynamic mechanical properties of flame retardant poly(lactic acid) (PLA)/EG composites. The composites were prepared by melt-mixing and their structure, ... Read more
Mycolic acids, a promising mycobacterial ligand for targeting of nanoencapsulated drugs in tuberculosis

Author: Lemmer, Yolandy ; Kalombo, Lonji ; Pietersen, R-D ; Jones, AT ; Semete-Makokotlela, Boitumelo ; Van Wyngaardt, S ; Ramalapa, BE ; Stoltz, A ; Baker, B ; Verschoor, JA ; Swai, HS ; De Chastellier, C Date: Jun 2015 The appearance of drug-resistant strains of Mycobacterium tuberculosis (Mtb) poses a great challenge to the development of novel treatment programmes to combat tuberculosis. Since innovative nanotechnologies might alleviate the limitations ... Read more
Scanning and transmission electron microscopy investigation of multiwall carbon nanotube/nickel oxide nanocomposite thin films

Author: Roro, Kittessa T ; Mwakikunga, Bonex W ; Tile, N ; Forbes, A Date: Dec 2011 Owing to their unique electronic and optical properties, nanocomposite thin films are widely used for converting solar radiation therapy into other conventional energy forms, such as heat and electricity. Carbon nanotube-based composites which ... Read more
Smart 3D cell culture using a thermoresponsive PP nonwoven scaffold

Author: Chetty, A ; Rossouw, C ; Ntsangani, L ; Moolman, S ; Van Wyk, K ; Mancama, Dalubuhle T ; Anandjiwala, R ; Boguslavsky, L ; Vargha, V Date: May 2011 In this paper the grafting method will be described and characterisation of the smart PP-g-PNIPAAm scaffolds by fourier-transform infrared, scanning electron microscopy, x-ray photoelectron spectroscopy, differential scanning calorimetry, ... Read more
Structural evolution of a Ta-filament during hot-wire chemical vapour deposition of Silicon investigated by electron backscatter diffraction

Author: Oliphant, CJ ; Arendse, CJ ; Prins, SN ; Malgas, GF ; Knoesen, D Date: Mar 2012 In this study we investigate the structural changes of a burnt-out tantalum filament that was operated at typical hydrogenated nanocrystalline silicon synthesis conditions in our hot-wire chemical vapour deposition chamber. Scanning electron ... Read more
Tensile properties of polymethyl methacrylate coated natural fabric Sterculia urens

Author: Jayaramudu, J ; Guduri, BR ; Rajulu, AV Date: Apr 2009 The newly identified natural fabric from the tree of Sterculia urens was coated with polymethyl methacrylate. The tensile properties of both the uncoated and polymethyl methacrylate coated fabrics were studied. The tensile parameters such as ... Read more
XRD, DRS, and SEM stundies of the effects of metal dopants (Pt and Au) on the structural and optical properties of TiO2

Author: Moloantoa, JR ; Rammutla, KE ; Mosuang, TE ; Erasmus, RM ; Hillie, KT Date: Jul 2011 Au and Pt doped TiO2 nanocrystlas were prepared using the sol gel method. Diffuse Reflectance Spectroscopy (DRS) was used to study the characteristics of these precious metals and X-ray diffraction (XRD) with calculated lattice parameters was ... Read more

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Browsing by Subject "Electron microscopy"

Browsing by Subject "Electron microscopy"

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