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Now showing items 11-20 of 205
Developmental anatomy of the central nervous system of the cotton leaf worm, spodoptera littoralis boisd.
(
Qatar University
, 1983 , Article)
The central nervous system, C. N. S., of the cotton leaf worm, Spodoptera littoralis (B.) develops from a median row of embryonic neuroblasts which divide repeatedly to form a double ganglionic chain. The two chains fuse ...
Constituents of plants growing in qatar x.* seasonal variations of the volatile oil of cymbopogon parkeri
(
Qatar University
, 1985 , Article)
The seasonal variation of the volatile oil of Cymbopogon parkeri Stapf. was studied. The oil content is higher during the hot dry season than during the humid hot season and the cold season. No qualitative differences among ...
Contribution To The Sedimentology Of The Bahariya Formation Of Gebel El-Dist, Bahariya Oasis, Western Desert, Egypt
(
Qatar University
, 1983 , Article)
Combined microscopic, grain-size and heavy-mineral analyses were carried out on the Bahariya Formation at Gebel El-Dist (type section), Bahariya Oasis. These studies revealed that the formation is composed of moderately ...
Primary Productivity of Lake Manzalah, Egypt, using C14 technique
(
Qatar University
, 1981 , Article)
The hydrographical and chemical conditions of Lake Manzalah, Egypt, are influenced by the surging in of saline water from the Mediterranean sea and are by no means stable. The average of the parameters studied during the ...
Relation between Quasi-normed Ideals of Entropy Numbers and of Approximation Numbers
(
Qatar University
, 1981 , Article)
Let en(T) and an(T) be the entropy numbers and approximation numbers of operator T between Banach spaces, respectively. Let ?p be the operator ideal defined by
Sp:^TeL;{en(T)^lp}, and Sp be the operator ideal defined ...
Effects of gamma radiation on the activity of the, mosquito culex pipiens L. : I. Effects on the attraction of the mosquito to light, colours and host
(
Qatar University
, 1988 , Article)
The present work was carried out to investigate the effects of gamma radiation at three doses: 40, 80 and 120 Gray. On the response of the adult mosquito Culex pipieas complex when irradiated in the larval, pupal or adult ...
Concerning Sequential Spaces
(
Qatar University
, 1985 , Article)
In this paper, important notions concerning sequential spaces are clarified new ideas, one of which is a complete and direct proof of the fundamental theorem characterizing sequential spaces, are introduced.
Methylated Flavonoids From Artemisia Monosperma
(
Qatar University
, 1989 , Article)
Investigation of the flavonoid constituents of Artemisia monosperma resulted in the isolation and identification of four methylated flavonoids: quercetin 3,3',4'-trimethylether, diosmetin (luteolin 4'-methylether), ...
Neurosecretory Cells In Certain Earthworms Species (Oligochaete)
(
Qatar University
, 1987 , Article)
Typical Neurosecretory cells of the cerebral ganglion were studied in three oligochaete families: A. porrectodea caliginosa, Dendrodrilus rubidus: (Lumbricidae)';
Amynchas corticis : (Megascolidae); Dichogaster bolaui: ...
Khashm Formation, A New Lithostratigraphic Unit Within The Cretaceous Wasia Group Of Arabia
(
Qatar University
, 1988 , Article)
The Khashm Formation is introduced as a new lithostratigraphic unit to include the sandstones and shale interbeds which constitute the upper part of the Cretaceous Wasia Group (s. /.) outcropping in central Arabia. It ...