Search
Now showing items 101-107 of 107
Fluometuron Induced Growth, Chemical And Photosynthetic Changes In Chlorella Vulgaris
(
Qatar University
, 1988 , Article)
Presence of fluometuron at different concentrations in the culture medium of Chlorella vulgaris induced pronounced inhibition in the growth rate and dry weight of the alga throughout the experimental period. Furthermore, ...
A short critique of the Crescent English Course
(
Qatar University
, 1988 , Article)
This paper is a short critique of the "Crescent English Course", Pupils Book 2. It falls into two parts. The first is information about the course; its aims, organization and some of its general characteristics. The second ...
A study of the interlanguage of some Arabic students of English
(
Qatar University
, 1988 , Article)
In this study, the contrastive analysis method is used to investigate the lnterlanguage (IL) developmental sequences of the acquisition of some aspects of English by Arabic-speaking learners. The learners, whose language ...
Constituents of plants growing in Qatar part XV. Chemical investigation and pharmacotoxicity of pyrrolizidine alkaloids of moltikiopsis ciliata
(
Taylor & Francis
, 1988 , Article)
Chemical study of the alkaloidal constituents of Moltikiopsis ciliata resulted in the isolation and identification of heliotrine and echinatine, in addition to other minor alkaloids. Pharmacological experiments revealed: ...
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. ...
Sesquiterpene lactones from Pulicaria sicula
(
Elsevier
, 1988 , Article)
The aerial parts of Pulicaria sicula afforded the known xanthanolides 1-6, the guaianolides 7 and 8 as well as two new ones, the lactone 9 and the corresponding epoxide 10. Furthermore nerylisobutyrate and the thymol ...