Browse
Recent Submissions
Item Training and capacity building on the Coastal Climate Change Tool(2023-10) Lück-Vogel, MelanieThis presentation was the baseline for about 20 training workshops to government official on coastal climate change, coastal flood and erosion risk lines and coastal management lines. These workshops were conducted between 2020 and 2023 on behalf of DFFE with funding from the German GIZ and the Benguela Current Convention.Item A note on the condensation reactions of methyl ethyl ketone(1951) Van Duuren, BLDuring an investigation of the nitric acid oxidation product of coal a neutral liquid was isolated.Item Report on visits to Lourenco Marques in connection with the spontaneous heating of uitkyk export coal in the S.S. Amstelstad(1948) La Grange, CC; Petrick, AJAn officer of the Institute was accordingly sent to Lourenco Marques to obtain first hand information on excessive heating matter.Item Tests to determine the suitability of selected fuels in S.A.R. Dining saloon stoves(1949) La Grange, C.C; Van Doornum, GAWDuring 1948 the South African Railways and Harbors Administration approached the Institute with the request for collaboration in an investigation aimed at rendering fires in dining saloon stoves smokeless while trains were in large stations - more especially the new Johannesburg station where every effort was to be made to eliminate the smoke nuisance.Item The microscopical examination of coal in reflected light(1954) Moodie, BRecords show that the first microscopic observations were carried out on coal in the year 1830 by Lindley. The apparatus he used was crude and his work was mostly confined to the examination of fossilized leaves found in certain coals.Item The occurrence of germanium in South African coal and derived products(1955) Kunstman, FH; Hamersma, JCThe chemical behavior of germanium has been studied extensively but its present economic value results from its physical properties.Item A laboratory study of the interrelationship between wool scouring efficiency and the partition of detergent during subsequent centrifuging(1981-12) Mozes, TE; Van Rensburg, NJJ; Turpie, DWFA laboratory study of the use of twenty nonionic detergents for scouring of raw wool showed that scouring efficiency decreased with an increase in the detergent partition coefficient obtained by centrifuging of artificial creams prepared with B.P lanoline.Item A laboratory process for dyeing wool with reactive dyes from a charged solvent system using a single emulsifier(1975-08) Botha, C; Roberts, MBA relatively simple technique has been devised whereby wool may be satisfactorily dyed with reactive dyes from an aqueous charged perchloroethylene system.Item A comparison of the abrasion results obtained three different instruments on some woven fabrics(1984-12) Bird, SLThe Stoll (flex), Martindale and Accelerator abrasion results of 64 plain and twill weave fabrics of differing fibre content and fabric mass were determined and compared.Item A laboratory investigation into the possible use of acetylation for (i) The elimination of the discolouration of phenol-formaldehyde resin treated cotton fabric and (ii) The prevention of subsequent discolouration on exposure to light(1977-03) Horn, RESamples of phenol-formaldehyde resin finished cotton fabric when acetylated were found to be less discoloured than unacetylated fabric.Item A comparison of some commercial self-twist (STT) and ring-spun wool yarn properties(1981-07) Hunter, L; Gee, E; Smuts, SIn spite of the widely reported similarity of properly constructed STT yarns and two-ply ring spun yarns in terms of physical properties and weaving performance, a mill with a large Repco installation approached SAWTRI because of problems they were experiencing with the weaving performance of certain all-wool STT yarns.Item SAWTRI Special publication: A review of recent developments in warp sizing(1985-08) McMahon, JF; Van der Walt, GHJThis report presents a review of some of these non-conventional systems linked to warp sizing.Item A comparison of open-end and ring spinning of cotton. Part 3: The effects of mercirization on single yarn friction, knitting performance and fabric poperties(1978-02) Hunter, L; Smuts, SThis report is concerned with the yarn frictional properties, which were not covered in the earlier studies, the knitting performance of the yearns and the physical properties of the resulting fabrics.Item SAWTRI Special publication: A review of the effect of impurities on the photostability of polypropylene(1985-10) Trollip, NGThe discovery of heterogeneous stereospecific catalyst systems by Ziegler and Natta 1953 heralded the birth of a wide variety of new polymers such as highly crystalline (isotactic) polypropylene.Item A statistical assessment of the accuracy of the measurement of spinning potential by the MSS at break technique(1976-08) Gee, ESome of this data together with data as yet unpublished, were used in this present report with the object of obtaining a statistical assessment of the accuracy of the MSS (Mean Spindle Speed) at break technique.Item A laboratory investigation of the shrinkresist treatment of wool with polymide epichlorohydrin-polyacrylate polymer dispersions(1975-06) Van Rensburg, NJJSome factors affecting the shrinkresist treatment of wool by chlorination followed by a treatment with a polyamide epichlorohydrin (PAE)-polyacrylate dispersion were studied.Item A comparison of some properties of wool-rich fabrics containing all wool, wool/nylon core-spun or staple fibre blend yarns(1973-10) Shiloh, MPlain and twill weave light weight suiting fabrics were woven from each of three types of yarns; all-wool, 80/20 wool/nylon staple blends and 80/20 wool/nylon filament cores.Item A study of breaking strength of weak places in worsted yarn(1971-11) Van Rooyen, B; Hunter, IM; Slinger, RIThis report details the relationship between the values obtained on a Shirley Constant tension Winding ester and certain yarn properties, such as tensile strength, irregularity, twist etc.Item A rapid measure of spinning potential: Mean spindle speed at break(1975-02) Turpie, DWFThe spindle speed of a 144 spindle ring frame was increased in steps at a given rate during the spinning of wool to relatively fine counts until all ends were down.Item A method for removal of chromium from chrome dyeing effluent(1976-09) Roberts, MBThe minimum quantity of chromate necessary for the production of deep colors of high wet fastness on wool is shown for four chrome dyes.