Author:Fatoki, OS; Bornman, M; Ravandhalala, L; Chimuka, L; Genthe, Bettina; Adeniyi, ADate:Jan 2010Phthalate ester plasticizers were determined in rivers and dams of the Venda region, South Africa. Liquid-liquid extraction, column chromatographic clean-up and capillary gas chromatography were the methods used for the quantitative analyses. ...Read more
Author:Oni, J; Ozoemena, KIDate:Aug 2012Numerous are the ways through which phthalocyanines have been put into very good use. The on-going search for new energy storage and conversion systems has made phthalocyanines even prettier as alternatives to metal and metal oxide catalysts ...Read more
Author:Moodie, BDate:1975There are two variations in every coal seam seam namely type and rank. Type is determined by the plant material from which the coal was formed and rank is the degree of maturation or metamorphism. Rank is the most important property of a ...Read more
Author:Berry, HDate:1949The No. 4 seam at this colliery, judging from the diagrammatic representations at the end of the report, appears to maintain a uniform structure and a fairly consistent thickness throughout the mine.Read more
Author:Gbadeyan, OJ; Bright, G; Sithole, Bishop B; Adali, SDate:Feb 2020In this study, microhardness and flow strength (tensile) of a shell of an African Giant snail (Achatina Fulica) were studied as a function of indentation load. The influence of loading direction on the hardness of the nacreous and prismatic ...Read more
Author:Coetzee, L; Butgereit, L; Smith, Andrew C; Thomson, TDate:Nov 2012A smart environment consists of three elements: automation facilities, a network, and intelligent control. This paper describes a project in which a physical model of a smart environment was created, connected to the Internet, and controlled ...Read more
Author:Zheltov, GI; Astafyeva, LG; Karsten, AEDate:Mar 2007A method for the calculation of blocking of blood flow upon treatment of vessel pathologies by laser irradiation at a wavelength of 530 nm are considered. The model is based on the assumption that blood-vessel occlusion is a consequence of ...Read more
Author:Zheltov, GI; Astafyeva, LG; Karsten, AEDate:Mar 2007A method for the calculation of blocking of blood flow upon treatment of vessel pathologies by
laser irradiation at a wavelength of 530 nm are considered. The model is based on the assumption that bloodvessel
occlusion is a consequence of ...Read more
Author:Litvin, IA; Burger, L; Forbes, ADate:Jul 2006A physical optics model is proposed to describe the transverse modal patterns in crossed Porro prism resonators. The model departs from earlier attempts in that the prisms are modeled as non-classical rotating elements with amplitude and phase ...Read more
Author:Van Schoor, Michael; Mare, LDate:Jan 2015This chapter explains why geophysicists usually want to know as much as possible
about the physical properties of the different lithological units in an area before
embarking on a geophysical survey. We also highlight some of the common ...Read more
Author:Mvango, Sindisiwe; Mthimkhulu, N; Fru, PA; Pilcher, LA; Balogun, Mohammed ODate:Nov 2020Betulinic acid (BA) is a naturally occurring plant pentacyclic triterpenoid with activity against cancer and infectious diseases like malaria and AIDS. Its pharmacological activity is limited by low aqueous solubility and bioavailability. ...Read more
Author:Nkosi, F; Palaniyandy, Nithyadharseni; Raju, Kumar; Billing, C; Ozoemena, KIDate:Sep 2019A lithium manganese rich-transition metal oxide, Li1.2Mn0.52Co0.13Ni0.13Al0.02O2 (LMNCA) cathode was successfully prepared by the combustion method with urea (i.e., LMNCA-urea) and ethylene glycol (EG) (i.e., LMNCA-EG) used as fuels. The ...Read more
Author:Mavundla, SE; Malgas, GF; Motaung, DE; Iwuoha, EIDate:2010Copolymers of aniline and pyrrole have been prepared by chemical oxidative- olymerization of aniline and pyrrole using ammonium per sulphate and ferric chloride as oxidants. The structural and morphological properties were studied by X-ray ...Read more
Author:Abraham, E; Deepa, B; Pothan, LA; John, Maya J; Narine, SS; Thomas, S; Anandjiwala, RDate:Nov 2012Cellulose nanofibres (CNF) with diameter 10–60 nm were isolated from raw banana fibres by steam explosion process. These CNF were used as reinforcing elements in natural rubber (NR) latex along with cross linking agents to prepare nanocomposite ...Read more
Author:Moraal, H; Britton, D; Derry, T; Forbes, A; Grayson, D; Mullins, S; Scholtz, F; Sefako, RDate:2009The chapter is about physics and astronomy. The chapter gives a background about the origins of physics in South Africa. After the CSIR was founded in 1945, physics emerged as a nationwide and unified discipline. The authors show how physics ...Read more
Author:Fairbanks, DHKDate:Jul 2000In an effort to develop more holistic ecosystem approaches to resource assessment and management, landscapes need to be stratified into homogeneous geographic regions. These regions can then be used in a monitoring framework to develop reliable ...Read more