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Now showing items 81-90 of 107
سد الذرائع بين الإلغاء والاعتبار : بحث أصولي في الأدلة المختلفة فيها
(
Qatar University
, 1988 , Article)
Algal Nitrogen Fixation In The Northwestern Part Of The Arabian Gulf
(
Qatar University
, 1988 , Article)
Nitrogen fixation and cell counts of blue-green algae and diatoms in the northwestern area of the Arabian Gulf were assayed during the (period, 7-20 November, 1984. Spatial variations indicated that the maximum rate of ...
Cytological Studies On The Effect Of The Herbicide "Dual" On Allium Cepa
(
Qatar University
, 1988 , Article)
Dual is widely used in Egypt as an active herbicide against annual grass weeds in soybean, sunflower, sugar beet and maize. Cytological studies have been carried out to show the effect of the herbicide on cell division in ...
New Potassium/Argon Ages For The Volcanic Rocks Of Halul Island (Qatar)
(
Qatar University
, 1988 , Article)
The only rocks of igneous origin known to be exposed in Qatar are those of Halul and Shra'Auh Islands. They occur within a salt diapir and the age of these rocks is uncertain. They have generally been assigned to the Hormuz ...
Effect Of Temperature On Hyalomma (Hyalomma) Impeltatum Schulze And Schlottke (Ixodoidea: Ixodidae)
(
Qatar University
, 1988 , Article)
The effect of 21, 25, 29 and 34°C on developmental period duration, weight of different stages in the life cycle and conversion efficiency in Hyalomma (H.) impeltatum Schuize and Schlottke was investigated at 75% relative ...
Effect Of Carbon disulphide, Acrylonitrile And Formaldehyde On Egyptian Paddy Grain-Borne Fungi
(
Qatar University
, 1988 , Article)
Fumigation, with various doses of carbon disulphide, acrylonitrile and formaldehyde for 8, 16 and 32 hours, of paddy grains indicate that formaldehyde was more toxic to the fungi than carbon disulphide and acrylonitrile. ...
Completeness Of Distributive P-Algebras
(
Qatar University
, 1988 , Article)
According to the triple characterization of distributive p-algebras which is given by T. Katrinak, we characterize the completeness of distributive p-algebras.
Sequence Of Ossification In The Skeleton Of Growing Lizard Chalcides Ocellatus Forscal (Scincidae, Reptilia)
(
Qatar University
, 1988 , Article)
The distribution of cartilaginous and ossification rudiments were described in the live-bearing lizards, Chalcides ocellatus, at birth, one-month-old, and 12-month-old. The skeletal elements investigated are: neurocranium, ...
The Appendicular Skeleton In The Hatching And In Young Bunopus Tuberculatus Blanford, 1874 (Gekkonidae, Reptilia)
(
Qatar University
, 1988 , Article)
The appendicular skeleton and its calcification are described in Bunopus tuberculatus at 3 ages: at hatching, 6-month-old and 12-month-old. Between the 3 ages there are several differences in the osteological pattern. The ...
Two Notes On Modular P-Algebras
(
Qatar University
, 1988 , Article)
According to the definition of congruence .pairs which is given by T. Katrinak, every congruence relation of a modular p-algebra can be uniquely determined by a congruence pair.
In the present paper, we characterize strong ...