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Selective determination of thiamine (vitamin B1) in pharmaceutical preparations by direct potentiometric argentometric titration with use of the silver-silver sulphide ion-selective electrode
(
Elsevier
, 1989 , Article)
A simple and selective argentometric titration method is described for determination of thiamine (vitamin B1), based on direct potentiometric titration in alkaline media (⩾0.5M) in which a chemical transformation takes ...
Liquid membrane electrodes for the selective determination of nicotine in cigarette smoke
(
The Royal Society of Chemistry
, 1989 , Article)
Five liquid membrane electrode systems responsive to the nicotinium cation are described. These electrodes are based on the use of the ion-association complexes of the nicotinium cation with tetraphenylborate, 5-nitrobarbiturate, ...
Constituents of plants growing in Qatar IX. The antispasmodic components of cymbopogon parkeri stapf. Parkeri stapf
(
Taylor & Francis
, 1986 , Article)
Investigation of the lipid fraction of Cymbopogon parkeri revealed the presence of several active constituents, one of which possesses an antispasmodic activity and was identified as cryptomeridiol. Study of the other ...
Iridoids and flavonoids of Teucrium polium herb
(
Thieme
, 1986 , Article)
The iridoid glycoside teucardoside and the flavonoids salvigenin and cirsiliol have been isolated from Teucrium polium var. pilosum and T. polium var. alba. The medicinal significance of these findings is discussed.
Constituents of plant growing in Qatar. II. Investigation of Euphorbia granulata
(1982 , Article)
N/A.
Constituents of plants growing in Qatar
(
Elsevier
, 1986 , Article)
N/A.
Inhibitory effect of sodium nitrite on corrosion of lead in 0.1 M sodium hydroxide solution
(
Council of Scientific and Industrial Research
, 1988 , Article)
The effect of NaNO2 as an inhibitor for corrosion of lead in 0.1 M NaOH solution has been investigated at different temperatures using the Tafel plot technique. The concentrations of NaNO2 employed are in the range 1-5×10-5. ...
Polarization resistance study of inhibition of corrosion of lead by sodium benzoate in 0.1 M sodium hydroxide solution
(
Council of Scientific and Industrial Research
, 1989 , Article)
The effect of sodium benzoate (SB) as an inhibitor of corrosion of lead in 0.1 M NaOH solution has been investigated by using the polarization resistance technique. The concentrations of SB employed are in the range 1-5 × ...
THE TRANSFER OF PSYCHOLOGICAL KNOWLEDGE TO THE THIRD WORLD COUNTRIES AND ITS IMPACT ON DEVELOPMENT: THE CASE OF FIVE ARAB GULF OIL-PRODUCING STATES
(
Elsevier Science Publishers B.V.
, 1984 , Article)
Psychological knowledge transmitted by universities in Bahrain, Kuwait, Qatar, Saudi Arabia and the United Arab Emirates is presented and some historical-cultural roots identified. Required courses for a B.A. are similar ...