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السجلات المعروضة 51 -- 60 من 77
Ecological Studies On The Bottom Fauna Of Lake Manala, Egypt
(
Qatar University
, 1990 , Article)
An ecological survey has been conducted for the benthic Community in Lake Manzala during May and June, 1985. The diversity and distribution of organisms are largely determined by salinity. Mean abundance of benthic fauna ...
Factors Governing Mosquito Susceptibility To Bacillus Sphaericus Strains
(
Qatar University
, 1992 , Article)
Three lyophilized strains of Bacillus sphaericus (1593-4, 2297 and SSII) were tested against four different mosquito species. Culex pipiens larvae demonstrated the highest level of susceptibility towards the 3 B. sphaericus ...
The effect of the insecticide (primicid) On neurosecretory cells of the earthworm aporrectodea caliginosa
(
Qatar University
, 1995 , Article)
The effect of the insecticide "Primicid" on the neurosecretory cells of the cerebral ganglion of the earthworm Aporrectodea caliginosa was studied. The fine changes in the organelles of certain ncurosecrelory cells was ...
Histological observations on the changes in Thyroid activity in the geckonid lizard, bunopus tuberculatus, during tail regeneration
(
Qatar University
, 1994 , Article)
Histological observations on the thyroid activity during differentphases of tail regneration in the geckonid lizard, Bw/jo/ms tuberculatus, have indicated a decreased thyroid activity during wound-healing phase. During ...
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 ...
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 ...
Haemogregarines of geckos in egypt, together with a description of haemogregarina helmymohammedi n.sp.
(
Qatar University
, 1995 , Article)
Three species of geckos collected from various localities in Egypt were examined for protozoan blood parasites. Haemogregarines were reported in all the three species of geckos. Problems of the generic and specific ...
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 ...
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). ...