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Now showing items 11-20 of 126
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 ...
Histological And Histochemical Studies On The Decidua And The Uterine Glands During Early Pregnancy In The Rat (Rattus rattus)
(
Qatar University
, 1986 , Article)
Histological and histochemical studies were carried out on the decidua and uterine glands in the uteri of pregnant rats 'Rattusrattus' between 129 hours post.-coitum (p.c) and day nine of pregnancy. Decidualization was ...
Time And Order Of Appearance Of Ossification Centres Of The Rat Skeleton
(
Qatar University
, 1985 , Article)
The time and sequence of ossification pattern of the skeletal system of the Rattus rattus were studied in serial whole mounts prepared from Day 10 to Day 21.5 (day of delivery). In the neurocranium, each bone is represent ...
Gonadal Development Of Lead Intoxicated Rat Embryos
(
Qatar University
, 1987 , Article)
Pregnant rats injected with 60ju,g lead nitrate/gm body weight on day 8 of gestation showed a significant fetal resorption and reduced size of gonads on day 13.5 gestation. Incidence of fetal death and fetal resorption ...
Effect Of The Apical Ectodermal Ridge On Mitotic Index In Hind Limb Bud Mesenchyme In Bufo Regularis
(
Qatar University
, 1991 , Article)
The apical ectodermal ridge (AER) was formed at stage 51 of Bufo regularis, it persisted at stage 52 (limb bud acquiring paddle-shaped outline), then it disappeared by stage 53 (first indication of fourth and fifth toes). ...
Helminth parasites of fishes from the arabian gulf 1. Preliminary general survey of fishes mainly from qatari waters
(
Qatar University
, 1986 , Article)
The present work reports the results of a preliminary survey on the helminth parasites of some fish, caught mainly from Qatari waters in the Arabian Gulf. The incidence of helminth infections varied in various fish families, ...
Lead-Induced Malformations and Kidney Destruction of Developing Chick Embryos
(
Qatar University
, 1993 , Article)
Two doses of lead nitrate, 0.5 and 0.1 mg/egg, were injected into the eggs after 3 days of indubation. Lead nitrate increased mortality rate and decreased the body weight of developing embryos. The lead nitrate also decreased ...
A Preliminary List Of The Insect Fauna Of Qatar
(
Qatar University
, 1985 , Article)
The present paper give a preliminary account of the entomofauna of Qatar. It has a complex composition, the species are a heterogenous group with diverse distribution patterns.
The account does not lay to completeness. ...
The blood cells of a sea urchin from abou-kir coast Alexandria, Egypt.
(
Qatar University
, 1993 , Article)
The blood cells of a common sea urchin, collected from Abou-Kir region, were investigated using light and electron microscopy. Their distribution, properties, characteristics and histogenesis were determined. On the basis ...
Scanning electron microscopy on adults of Schistosoma mansoni treated in-vivo with praziquantel and RO-15 (5458).
(
Qatar University
, 1997 , Article)
In view of the known relationship between changes in the tegumental surface of schistosomes and the potency of antischistosomal drugs,
the present work is done to study the effect of two oral drugs, namely Praziquantel ...