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Effect of some Vegetable Plant Hosts on the Biological Responses of Brevicoryne Brassicae (L) and Aphis Gossypii (Glover).
(
Qatar University
, 1982 , Article)
The influences of these different vegetable plant hosts on the biological response of Brevicoryne brassicae (L) and Aphis gossypii (Glover) were studied.
The results obtained for B. brassicae (L) indicated that the lowest ...
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 ...
Effect Of Hydrocortisone On The Skin Of The Developing Chick Embryo
(
Qatar University
, 1986 , Article)
Hydrocortisone treatment of chick embryos caused acceleration of epidermis thickening and keratinization, decrease in dermal cell number and increase of dermal collagenous fibres. The hormone also caused a marked increase ...
Helminth parasites of fishes from the arabian gulf: 4. On allacanthochasmus lutjani n.sp. And metadena leilae nagaty, 1957 (digenea: cryptogonimidae)
(
Qatar University
, 1988 , Article)
Allacanthochasmus lutjani n.sp. is described from Lutjanus fulviflamma caught from Qatari waters in the Arabian Gulf. It differs from other species of the genus, mainly by the shape and position of the ovary, presence of ...
Some Histological And Histochemical Aspects Of Egg-Implantation In The Rat
(
Qatar University
, 1987 , Article)
The rat embrayo and uterine epithelium were studied during implantation at 129h p.c., 138h p.c. and 153h p.c., stages. The basophilic bodies found in the iiinpr cell mass and in the uterine epithelium represent dead cells ...
Studies On The Trematodes Of The Genus Enenterum Linton, 1910 (Opecoelidae) And The Oenus Pseudocreadium Layman, 1930 (Lepocreadiidae) From Some Red Sea Fish
(
Qatar University
, 1985 , Article)
The genera Enenterum and Pseudocreadium are reviewed. It is suggested that Pseudocreadium indicum Madhavi, 1972 should be considered a synonym of P. balistes Nagaty, 1942. Enenterum pimelopteri Nagaty, 1942, is redescribed ...
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 ...
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 ...