Showing papers by "The Chinese University of Hong Kong published in 1968"
01 Jul 1968
TL;DR: In this article, the authors apply the results of (4) to a class of function spaces distinguished by their invariance under a certain family of operators, including all Orlicz spaces and the symmetric Kothe spaces.
Abstract: 1. In this paper, I apply the results of (4) to a class of function spaces distinguished by their invariance under a certain family of operators. This class contains the Lp spaces (indeed, all Orlicz spaces) and the symmetric Kothe spaces of (5). My original objective was simply a more general expression of the ideas of (5), but I found myself taking up a rather different approach.
14 citations
TL;DR: In this article, a sensitive atomic absorption method was described for the determination of chromium at sub-microgram levels, where chromium(III) is converted to its acetylacetone complex and extracted into MIBK.
13 citations
TL;DR: A method for the determination of scandium in sea-water at the sub-microgram level has been developed using nitrous oxide-acetylene flame for atomic-absorption spectroscopy and recovers of 99-100% are obtained.
12 citations
TL;DR: Optimum instrumental conditions were investigated for the determination of trace quantities of scandium by atomic-absorption spectroscopy and enhancement effects by organic solvents and by complex extractions were studied.
6 citations
TL;DR: The chemical constituents of 16 specimens of biliary mud collected from human cases of clonorchiasis are analysed and polyphenol oxidase is believed to play an important part in the mud formation.
2 citations
TL;DR: In this paper, the second harmonic generation of light (SHG) double refraction has been detected in thin crystals 1 mm to 2 mm thick, using as an input beam the light from a gas laser.
Abstract: THE first observations of second harmonic generation of light (SHG) were made with a high-power pulsed ruby laser. Since then these nonlinear effects have been successfully observed with continuous wave He–Ne gas lasers1. Recently, the so-called aperture effect of SHG, which had been predicted2 and which is equivalent to the familiar phenomenon of double refraction, was experimentally observed3 in long crystals (of length 5 to 10 cm). We report here that SHG double refraction has been detected in thin crystals 1 mm to 2 mm thick, using as an input beam the light from a gas laser.
TL;DR: By comparing the colour intensities of the metal dithizonates developed from the standards and the samples, a semiquantitative measurement can be made.
Abstract: A method for screening copper and lead in urine is described. The heavy metals are extracted from urine using a chelating ion exchange resin, and subsequently separated by paper chromatography. By comparing the colour intensities of the metal dithizonates developed from the standards and the samples, a semiquantitative measurement can be made.