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Now showing items 1-13 of 13

Bridging the science-management divide: moving from unidirectional knowledge transfer to knowledge interfacing and sharing

Author: Roux, DJ ; Rogers, KH ; Biggs, H ; Ashton, PJ ; Sergeant, A Date: Jun 2006 Sustainable ecosystem management relies on a diverse and multi-faceted knowledge system in which techniques are continuously updated to reflect current understanding and needs. The challenge is to minimize delay as ideas flow from intent ... Read more
Cloning and characterization of a carboxylesterase from Bacillus coagulans 81-11

Author: Mnisi, SM ; Louw, M ; Theron, J Date: Apr 2005 A genomic library of Bacillus coagulans strain 81 -11 was screened in Escherichia coli JM83 for lipolytic activity by using tributyrin agar plates. A 2.4 kb DNA fragment was subcloned from a lipolytic-positive clone and completely sequenced. ... Read more
Comparative investigation of micro-flaw models for the simulation of brittle fracture in rock

Author: Sellers, E ; Napier, J Date: Jul 1997 The search for a numerical method to model fracture formation around deep level gold mine excavations had led to the development of the DIGS (Discontinuity Interaction and Growth Simulation) boundary element code to simulate the incremental ... Read more
Comparison of calculated spectra for the interaction of photons in a liquid scintillator. Example of Mn-54 835 keV emission

Author: Cassette, P ; Ahn, GH ; Alzitzoglou, T ; Aubineau-Laniece, I ; Bochud, F ; Torano, EG ; Carles, AG ; Malonda, AG ; Kossert, K ; Lee, KB ; Laedermann, JP ; Simpson, BRS ; Van Wyngaardt, WM ; Zimmerman, BE Date: Oct 2006 The CIEMAT/NIST and TDCR methods in liquid scintillation counting, initially developed for the activity standardization of pure beta radionuclides, have been extended to the standardization of electron capture and beta–gamma radionuclides. ... Read more
CSIR ScienceScope: Art and science of modelling and simulation

Author: CSIR Date: Mar 2008 The art and science of modelling and simulation Read more
Evaluating the rate of migration of an uranium deposition front within the Uitenhage Aquifer

Author: Vogel, JC ; Talma, AS ; Heaton, THE ; Kronfeld, J Date: Jul 1999 The solubility of uranium in groundwater is very sensitive to changes in redox conditions. Many secondary sandstone-type uranium deposits have been formed when soluble U has precipitated after encountering reducing conditions in the subsurface. ... Read more
Free vibration of elastically supported thin cylinders including gyroscopic effects

Author: Loveday, Philip W ; Rogers, CA Date: 29 Oct 1998 The free vibration of thin cylinders with elastic boundary conditions was analysed by application of the exact solution of the Flugge shell theory equations of motion. The elastic boundaries were represented by distributed linear springs. By ... Read more
Magnetic properties comparison of mass standards among seventeen national metrology institutes

Author: Becerra, LO ; Berry, J ; Chang, CS ; Chapman, GD ; Chung, JW ; Davis, RS ; Field, I ; Fuchs, P ; Jacobsson, U ; Lee, SM ; Loayza, VM ; Madec, T ; Matilla, C ; Ooiwa, A ; Scholz, F ; Sutton, C ; van Andel, I Date: Sep 2006 The ubiquitous technology of magnetic force compensation of gravitational forces acting on artifacts on the pans of modern balances and comparators has brought with it the problem of magnetic leakage from the compensation coils. Leaking ... Read more
Novel baker's yeast catalysed hydride reduction of an epoxide moiety

Author: Horak, RM ; Learmonth, RA ; Maharaj, VJ Date: 27 Feb 1995 The preparation of 2-[2H]-l-(p-nitrophenyl)-1,2-epoxyheptan-3-one and its subsequent reduction by baker's yeast to the 2,3-diol is described. The mechanism of the reduction of the epoxide was determined using the B-2H isotope shift in 3C ... Read more
Oxygen and hydrogen isotope ratios in tree rings: how well do models predict observed values?

Author: Waterhouse, JS ; Switsur, VR ; Barker, AC ; Carter, AHC ; Robertson, I Date: 30 Jul 2002 Annual oxygen and hydrogen isotope ratios in the alpha-cellulose of the latewood of oak (Quercus robur L.) growing on well-drained ground in Norfolk, UK have been measured. The authors have compared the observed values of isotope ratios with ... Read more
Raman spectroscopic study of some chalcopyrite-xanthate flotation products

Author: Andreev, GN ; Barzev, A Date: 16 Dec 2003 The ability of Raman spectroscopy to investigate chemical substances in water media was applied for studying the surface products of the chalcopyrite-sodium isopropyl xanthate flotation system. Performing the reaction in model conditions, ... Read more
Ramsdellite-MnO2 for lithium batteries: The ramsdellite to spinel transformation

Author: Thackeray, MM ; Rossouw, MH ; Gummow, RJ ; Liles, DC ; Pearce, K ; De Kock, A ; David, WIF ; Hull, s Date: Jun 1993 A pure and highly crystalline form of ramsdellite-MnO2 has been synthesized by acid treatment of the spinels LiMn2O4 and Li2Mn4O9 at 95°C. Although the ramsdellite-MnO2 framework remains intact on lithiation at 70°C, the hexagonally-close-packed ... Read more
Synthesis of lithium-manganese-oxide spinels: A study by thermal analysis

Author: Thackeray, MM ; Rossouw, MH Date: Dec 1994 The synthesis of lithium-manganese-oxide spinels by reaction of Li2CO3 and MnCO3 in air and under nitrogen to T(max) = 600°C has been investigated by thermogravimetric analysis and differential scanning calorimetry. When the reaction is ... Read more

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Browsing by Subject "Sciences"

Browsing by Subject "Sciences"

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