Author:Tarboton, WRDate:Sep 1977A provisional avifaunal checklist based on observations made during the period September 1974 to July 1976 is presented. Of 325 species recorded, 197 are classified as resident, 64 as migrant, 14 as sporadic, 13 as vagrant while 37 are of ...Read more
Author:Weideman, E; Van der Walt, LTDate:Jan 1978The relative importance of various parameters such as temperature, concentration and treatment time on the chemical softening and bleaching of phormium fibre, has been investigated on a pilot scale.Read more
Author:Weidman, E; Robinson, GADate:Nov 1981Phormium fibre was softened under different conditions and then spun with the aid of two different core yarns on the DREF system.Read more
Author:Weidmann, E; Grabherr, HDate:Aug 1977Phormium tenax fibres have so far only used for the manufacturing of grain bags and affiliated products.Read more
Author:Beyers, E; Van Rooyen, DDate:1950Comparatively few investigators have studied the reaction of halogens with coal. Evidence was found that substitution and addition reactions occur and that more hydrochloric or hydro bromic acid may be formed than could be explained by a ...Read more
Author:Roberts, MBDate:Feb 1978Residual chromium values were determined after dyeing untreated chlorinated and chlorine/ Hercosset treated wools with chrome dyes using various levels of dichromate.Read more
Author:Savage, W.H.D; Savage, WHDDate:1957The "International Classification of Hard coals by type", published by the United Nations in 1956, consists of primary classification by volatile matter content up to 33% volatile matter (dry ash free) and by calorific value (moist ash free) ...Read more
Author:Aldrich, De V; Kruger, PJDate:Nov 1972The influence of gauge setting and gill-feed on the efficiency with which the rectilinear comb removes impurities was investigated.Read more
Author:Aldrich, De V; Kruger, PJDate:Dec 1972The influence of the gap between pins, percentage void, pin and pin thickness on the combing performance of comb was investigated.Read more
Author:Atkins, ARDate:Jan 1968The design and calibration of an ergometer for exercising subjects during calorimetric studies in the climate chamber, are described. The ergometer is built into the climatic chamber and forms an integral part of the whole instrumentation ...Read more
Author:SANCORDate:Jan 1978With the ever-increasing demands on the resources of our planet, man's attention during recent years has turned more and more to the resources of the ocean and it is being increasingly recognised that the proper exploitation and conservation ...Read more
Author:Hunter, L; Robinson, GA; Green, MVDate:Jan 1976Different forms of loop distortion including cockling are defined with the aid of photographs.Read more
Author:Robinson, GA; Cawood, MP; Dobson, DADate:Aug 1978An attempt was made to correlate certain fibre and yarn properties of some 21 lots of wool with the amount of cockling found in the resulting fully fashioned garments.Read more
Author:Gray, DDate:1978The COED-process, a fluidized-bed pyrolysis coal conversion technique, is described in considerable detail. Using Illinois 6 coal as feedstock for the process, the coal is taken through the pyrolysis stages to produce a raw pyrolysis oil. ...Read more
Author:Maasdorp, APB; Black, WADate:Apr 1983The photochemical degradation of unpigmented and unstabilised polypropylene films can be monitored coloremetrically following reaction of the carbonyl groups produced, with 2,4-dinitrophenylhydrazone produced under acidic conditions.Read more
Author:Aldrich, De VDate:Feb 1971The combing performance of three types of comb cylinders were investigated, and compared on the basis of top cleanliness, mean fibre length of the top and fibre breakage.Read more
Author:Van Doornum, G.A.WDate:1968Many smokeless fuels are of low reactivity and thus not very suitable for use in open fire places as the ignition delay is unduly long and rate of heat release is low. It would appear that these properties may be modified in a favorable sense ...Read more