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Now showing items 91-100 of 205
A Remark On Proper Left H* — Algebras
(
Qatar University
, 1984 , Article)
W. Ambrose gave the theory of proper H* -algebras and M. Smiley in (2) gave an example of a left H* -algebra which is not a two-sided H* -algebra. Then he modified some of the arguments of Ambrose which yield the structure ...
Study of the Hydration of Blast-Furnace Slag Cement and Portland Cement by Mossbauer Spectroscopy
(
Qatar University
, 1982 , Article)
Mossbauer spectra have been measured for the hydrated blast-furnace slag cement and Portland cement pastes at different times of hydration of 1. 3. 7. 28 and 90 days. The spectra showed the existence of iron atoms, Fe3 (T) ...
Mitotic Disturbances Induced By The Drug "Novalgin" In Allium Cepa Root Tips
(
Qatar University
, 1984 , Article)
Growing root tips of Allium cepa are treated with seven concentrations of Novalgin ranging from 2.81 x 10 4 M to 1.5 x 10 4 M for 4, 8, 24,48 and 72 hours.
The frequency of mitotic phases in the treated roots varies ...
Night Distribution Of Certain Species Of Coleoptera As Indicated By Captures In A Light Trap At Quena
(
Qatar University
, 1984 , Article)
The night distribution of nineteen species over a whole trapping period can be considered under the following headings:
a. Early flyers b. Species with two peaks of activity. The effect of light of low intensity,
temperature ...
Structural Elements And Formation Parameters For Some Lower Cretaceous Sequences In The Western Desert, Egypt
(
Qatar University
, 1987 , Article)
The Lower Cretaceous sequences in the northern part of the Western Desert has been penetrated by many of drilled bore—holes adopted by different oil companies. It was encountered at depths ranging from 1200 to 3500 m. The ...
A Short Note On The Point-Wise Summability Of The Conjugate Series Of A Fourier Series In The Norlund Sense
(
Qatar University
, 1985 , Article)
In this note we consider an analogous theorem of [l] in the sense of point-wise summability of the conjugate series of a Fourier series in the Norlund sense
Inhibition Effect Of Four Oil Dispersants On Primary Productivity In Qatar Water (Ararian Gulf)
(
Qatar University
, 1987 , Article)
Four major oil dispersant mixtures in seawater wore used to depict their in—situ inhibition ratio to productivity rate of natural phytophanklon populations in Qatar water — Arabian Gulf — during the spring season of 1986. ...
A New Liquid Membrane Electrode For Selective Determination Of Caffeine
(
Qatar University
, 1984 , Article)
A new liquid membrane electrode for caffeine prepared from a solution of caffeine-picrylsulfonate ion-pair complex in n-octanol is developed. It exhibits Nernstian response in the range of 10'2 to lO^M caffeine with a ...
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, ...
The fecundity of gerres oyena forskal 1775, ( fam. Gerreidae) in the qatari waters of the arabian gulf
(
Qatar University
, 1986 , Article)
Fecundity estimates were made on a total of 180 mature fish Genes oyena Forskal of different lengths and weights, collected during the early spring of 1985. Log-log relationships were estimated between fecundity (either ...