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Now showing items 11-20 of 205
Generalized Airy's- and taylor Integral Functions
(
Qatar University
, 1982 , Article)
In this paper a generalized form of Airy's function has been estimated and an asymptotic expansion for one of its types is obtained. Furthermore, an improved formula could be induced to acquire the asymptotic expansion of ...
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. ...
Some Enzymatic Activities Of Fungi Isolated From Cotton Seeds And Cotton Seed Products
(
Qatar University
, 1984 , Article)
Five hundred different cultures which belong to fifteen genera and forty-one species, isolated from cotton seeds and cotton seed products were studied for proteolytic, amylolytic and lipolytic activities. About 80% of the ...
Botanical Exploration Of Sinai
(
Qatar University
, 1985 , Article)
The history of the botanical exploration of Sinai has been reviewed. It has been divided into the following periods:
I. Expeditions in the eighteenth century.
II. Exploration from 1800 till the publication of "Florula ...
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 ...
A histological study on the neuroendocrinal system of a coleopterous insect, cy3ister tripunctatus africanus cast.
(
Qatar University
, 1983 , Article)
Four different types of neurosecretory cells were identified in the brain of the adult water beetle, Cybister tripunctatus africanus Cast. These cells were identified into A, B, C, & D types according to their morphological ...
Comparative Histopathological Studies On The Effects Of Ionizing X-Ray Irradiation On Normal Liver And Hepatoma
(
Qatar University
, 1984 , Article)
Normal mice exposed to X-rays showed distinct external symptoms and died mostly on the 13th or 14th day after irradiation. Pathological symptoms were more exaggerated in mice diseased with hepatoma and subjected to the ...
Subsurface geothermal investigation in the nile delta, egypt.
(
Qatar University
, 1983 , Article)
The Nile Delta area is geothermally studied to define the behaviour of geothermal gradient in different wells and to determine the distribution of heat in some interesting rock formations. The geothermal investigation of ...
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) ...
Coralline Algae from the Neoegne and Pleistocene Sequence of Mersa Alam, Red Sea, Egypt.
(
Qatar University
, 1982 , Article)
Ten speciecs of family Corallinaceae (Coralline Algae) are herein recorded and described for the first time from the stratigraphic sequence of Mersa Alam, Red Sea, Egypt. Of these, Amphiroa knolli, Jania johnsoni and ...