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السجلات المعروضة 41 -- 50 من 1457
Early Cretaceous Dinoflagellate Cysts And Miospores From The Mersa Matruh 1 Borehole, North West Desert, Egypt
(
Qatar University
, 1994 , Article)
This study aims to document the Neocomian to Aptian palynological assemblages recorded in the Mersa Matruh borehole, north West Desert, Egypt. These palynological assemblages, consisting mainly of dinocysts, miospores and ...
Seismic Risk Evaluation Based on Maximum Likelihood Technique Applied For the Red Sea Region
(
Qatar University
, 1993 , Article)
An analysis of the seismic risk is carried out for the Red Sea region for the recorded earthquakes in the area between 1. January 1913 and 31 December 1982. The maximum likelihood method was applied to determine the hazard ...
Pyrrolizidine alkaloids from alkanna orientalis (L.) Boiss
(
Qatar University
, 1992 , Article)
Three pyrrolizidine alkaloids; 7-angelyl retronecine (I), 9-angelyl retronescine (II), and dihydroxytriangularine (III) were isolated by DCCC and VLC from Alkanna orientalis growing in Egypt. Their structures were elucidated ...
Towards a prospective transplantation of the local mangrove avicennia marina (forssk.) Vierh. Growing on coast of qatar i. Ecophysiological performance of juveniles.
(
Qatar University
, 1990 , Article)
A population sample of propagules was collected at random from average size A. marina trees growing at "Dhakhira" (Qatar). This sample was then divided into subsamples which were used to detect the effects of light intensity, ...
Additions to the flora of Qatar
(
Qatar University
, 1997 , Article)
Collections and earlier studies on the plants of Qatar are limited and of recent origin — since the seventies. The latest of these in 1983 (El Amin) listed 300 species belonging to 202 genera in 56 families. At present, a ...
Senso-Neuroendocrine Cells Within The Cerebral Ganglion Of The Earthworm Aporrectodea Caliginosa
(
Qatar University
, 1992 , Article)
Ciliated neurones of probable endocrine function are present inside and outside the cerebral ganglion of the earthworm Aporrectodea caliginosa. Cell fibers contain clusters ofsynaptoid vesicles in regions adjacent to the ...
Population biology of sparid fishes in qatari waters : 4. Growth and mortality of longspine sea bream (argyrops spinifer)
(
Qatar University
, 1995 , Article)
Age, growth and mortality of longspine scabrcam, Argyrops spinifer in the Arabian Gulf waters off Qatar were investigated. The study was conducted on 664 fish obtained from Qatar National Fishing Company. The results ...
Impulse Breakdown Characteristics In Air In The Presence Of A Local Spark
(
Qatar University
, 1996 , Article)
In this paper, we study the flashover phenomena in air gaps containing floating metallic objects. The effect of a local spark on the impulse breakdown characteristics of a model gap arrangement which simulating a gas ...
The Models of a General Component of a Distributed Computing Systems Based On Stochastic Petri Nets
(
Qatar University
, 1994 , Article)
In this paper we propose models of a distributed computing system (DCS) based on general stochastic Petri nets (GSPN). We also propose the means to decrease the number of states. We indicate that the complexity of DCS ...
Chromite Enrichment in the Recent Fluviatile Sediments, North Iraq
(
Qatar University
, 1999 , Article)
The Recent sediments from North Iraq are characterized by a higher content of chromite. This paper deals with the mineralogy and geochemistry of chromite in the heavy mineral assemblages from Recent fluvial sediments in ...