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Your search keyword '"TLC"' showing total 4 results
Start Over Descriptor "TLC" Publication Year Range More than 50 years ago
4 results on '"TLC"'

1. The Use of Thin Layer Chromatography (TLC) in Qualitative and Quantitative Determinations of Photographic Developing Agents (in Developer Solution) Using a Scanning Densitometer

Author

Gilbert, Michael

Subjects
Absorbent, Chromatography, Densitometry, Development, Hydroquinone, Sodium sulfite, Thin layer chromatography, TLC
Abstract

TLC was used, for qualitative and quantitative analysis of photographic developing agents hydroquinone, metol, phenidone, para phenylenediamine, para aminophenol, ascorbic acid and the oxidized species. Experimental conditions and procedures for reporting Rf values of the aqueous solutions of the developing agent were standardized. Quantitative TLC was done for hydroquinone. The density maxima obtained from the scanning densitometric trace of the eluted and visualized chromatogram was correlated to the concentration of the hydroquinone. Aqueous solutions of hydroquinone were prepared at four levels of concentration, three levels of pH and two levels of sodium sulfite concentration for quantitative analysis using TLC.

Published
1973

2. Barium Sulfate as an Adsorbent in TLC.

Author

Churi, R.Y., Shenai, V.A., and Parameswaran, R.

Abstract

Use of barium sulfate is indicated as an adsorbent for TLC of dyes. Some merits in this context also are discussed. [ABSTRACT FROM PUBLISHER]

Published
1972
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4. Delay-throughput performance of packet service in UMTS

Author

Luigi Fratta, Matteo Cesana, Antonio Capone, and Flaminio Borgonovo

Subjects
business.industry, Network packet, Computer science, Code division multiple access, Broadband networks, Automatic repeat request, TLC, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Time division multiple access, Hybrid automatic repeat request, Throughput, Data_CODINGANDINFORMATIONTHEORY, Channel capacity, Telecommunications link, Computer Science::Networking and Internet Architecture, Electronic engineering, business, Error detection and correction, UMTS frequency bands, Computer Science::Information Theory, Computer network, Communication channel
Abstract

The UMTS W-CDMA radio interface is characterized by great flexibility and a variety of different physical and logical channel types, rates and protections are possible, by choosing suitable parameters, such as spreading factors, code rates and ARQ schemes. In this paper we present the results, obtained by a detailed simulation, about the effect of several parameters and system alternatives on the capacity of the downlink shared channel.

Published
1970

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