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السجلات المعروضة 1 -- 10 من 13
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 ...
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 ...
Combined effects of oxygen, partial vacuum, temperature, humidity and gamma radiation on mating competitiveness of culex pipiens complex l. Males
(
Qatar University
, 1993 , Article)
When the pupal stage of Culex pipiens complex L. male mosquito was exposed to gamma radiation (60 Gy), oxygen, partial vacuum (0.1 torr), low temperature (10°C), for one or two hours, or low humidity (31% R. H.) for 3 ...
Tail Regeneration after Autotomy in the Geckonid Lizard Bunopus Tuberculatus
(
Qatar University
, 1993 , Article)
Tail regeneration in the geckonid lizard, Banopus tuberculatus was morphologically and histologically studied after induced atutomy. Seventy percent of the tail of each animal, by length, was removed by autotomy. Regeneration ...
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 ...
Studies On Some Fetal Rat Organs Following Maternal Hyperthermia
(
Qatar University
, 1993 , Article)
The present investigation was carried out to determine the histological changes in brain, liver and kidneys of rat fetuses maternally heatstressed at early stage of pregnancy to either high "spiking" temperature of short ...
The influence of oxygen, partial vacuum, temperature, relative humidity combined with gamma radiation on the mosquito, Culex pipiens complex l. I. Effect of exposure to temperature and relative humidity alone.
(
Qatar University
, 1993 , Article)
The results revealed that a temperature of 10°C was the most effective temperature on pupal mortality of Culex pipiens complex L. followed by 32°C then 20 and 26°C. There was a gradual increase in pupal mortality with ...
Combined effects of gamma radiation and Some physical factors on the rate of development of culex pipiens complex(L)
(
Qatar University
, 1993 , Article)
The present work deals with the role of some physical factors, applied separately or combined with gamma radiation on the Fj rate of development of Culex pipiens L. when treated in the pupal stage. The results showed no ...
Histology And Development Of Argas (Argas) Hermanni (Ixodoidea: Argasidae) Salivary Glands
(
Qatar University
, 1993 , Article)
The anatomy and histology of Argas (Argas) hermanni salivary glands were studied during nymphal and adult development. The paired salivary glands consist of 2 alveolar types. Type I alveoli consist of several cells forming ...
Prenatal Development of the Guinea Pig Kidney Quantitative And Qualitative Morphology
(
Qatar University
, 1993 , Article)
The normal prenatal development of the guinea pig kidney was investigated utilizing quantitative and qualitative histologic methods and microdissection technique during the last of the gestation period (day 46 to day 66). ...