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السجلات المعروضة 71 -- 80 من 114
Comparative Development Studies On The Lateral Canal System In Cyprinus Carpio And Gambusia Affinis Affinis
(
Qatar University
, 1990 , Article)
The lateral line canals and the neuromasts situated inside their lumina are described in two fishes differing in their feeding habits. There are 20 canal neuromasts in the bottom feeder Cyprinus carpio, while in the surface ...
Scanning Electron Microscopy Of The Egg And The Second Stage Larva Of Toxocara Vitulorum
(
Qatar University
, 1996 , Article)
The surface topography of the egg and 2nd stage larvae of the nematode Toxocara vitulorum are described by scanning electron microscopy. The eggs are oval and their surfaces are characterized by the presence of distinct ...
Blood Gases Of The Water Snake, Natrix Tesselluta, And The Desert Snake, Eryx Colubrinus
(
Qatar University
, 1983 , Article)
1. This comparative study examines 0^ dissociation curves of blood of two colobrine snakes: an aquatic snake, Natrix tesselluta, and a desert snake, Eryx colubrinus.
2. In the case of the whole blood of the aquatic snake, ...
On sexual dimorphism in the shrimp Palaemon pacificus (decapoda: palaemonidae) Collected from the red sea
(
Qatar University
, 1994 , Article)
Palaemon pacificus is common in the Red Sea coast and the sexes are separate. Potential sexual dimorphism in 38 morphological parameters was investigated in a population of Palaemon pacificus collected from the Red Sea ...
Phylogenetic studies on the architectural features of Amphibian (bufo regularis) and mammalian (oryctolagus cuniculus) kidneys
(
Qatar University
, 1994 , Article)
The results of the present study revealed that mesonephric and metanephric kidneys of both the anamniotes (Bufo regularis) and the amniotes (Oryctolagus cuniculus) vertebrates respectively differ morphologically, anatomically ...
The morphology of synhimantus (dispharynx) passeri sp. Nov., nematoda (acuariidae)
(
Qatar University
, 1990 , Article)
A new species of the nematode genus Syahimantus recovered from Passer domesticus niloticus at Cairo is described using both light and scanning electron microscopy. The taxonomy of the new species is discussed and compared ...
On Some Tintinnids (Protozoa : Ciliata)From The Strait Of Hormoz And The United Arab Emirates Waters
(
Qatar University
, 1995 , Article)
An examination of plankton samples collected from the oceanic waters of the Strait of Hormoz and the UAE inshore and offshore waters revealed the presence of a diverse community of planktonic Tintinnida (Protozoa). 38 ...
Effect Of Lead Nitrate On The Liver Of The Developing Chick Embryos
(
Qatar University
, 1991 , Article)
The liver of chick embryos treated with 0.03, 0.05 and 0.1 mg lead nitrate/egg showed disorganization of hepatic cords, abnormally enlarged blood sinusoids and extensive cell necrosis. The hepatocytes of lead-treated embryos ...
The Reproducing Capacity of Gamma Irradiated Adults of Trogoderma Versicolor (Creutz)
(
Qatar University
, 1993 , Article)
Male and female, Trogoderma versicolor (Creutz.) were irradiated by gamma radiation as newly emerged adults (12-24 hrs. after emergence). Males required higher doses than females to be sterilized and the reproductive ...
Microscopic Study Of The Rabbit Pancreas After Vagotomy
(
Qatar University
, 1997 , Article)
The microscopic study of the morphological changes in the rabbit pancreas were investigated after vagotomy. Structural changes were observed in the pancreatic acinar cells and in the islets of langerhans two and three weeks ...