بحث بسيط
السجلات المعروضة 341 -- 350 من 451
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 ...
Aptian To Cenomanian Palynomorphs From The Qarun 2-1 Borehole, Western Desert, Egypt
(
Qatar University
, 1993 , Article)
Rich distinctive, miospore assemblages are recovered from four sidewall core samples obtained from the Kharita Member of Burg El Arab Formation in the Qarun 2-1 borehole located in the eastern part of the North Western ...
New Contributions To The Geology, Geochemistry And Tectonic Setting Of The Aswan Granites, Southern Egypt
(
Qatar University
, 1990 , Article)
The Aswan granitic rocks occupy a region in southern Egypt between the stable Archaean craton of the south Western Desert and the less stable Pan-African belt of the south Eastern Desert. They include light-grey medium ...
Synthesis And Reactivity Of Substituted Chromones
(
Qatar University
, 1992 , Article)
The synthesis of 2-methyl-and 2-Styryl-6-bromo-7, 8-benzochromone and 2, 6-Dimethylchromone and their reactivity towards cyclo-addition reaction under Diels-Alder conditions and towards nucleophilic and electrophilic ...
Age Environmental Factors, Germination And Seedling Emergence Of Ocimum Basilicum L
(
Qatar University
, 1990 , Article)
Fresh and exhumed seeds of Ocimuni basilicum L. gave 100 % germination at 13/11-h alternating temperature of 20/10, 32/18, 38/24 and 40/32 °C but did not germinate at constant temperatures. Germination was prevented in the ...
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 ...
Population biology of sparid fishes in qatari waters 3. Reproductive cycle and fecundity of black-banded Seabream, mylio bifasciatus (forsskal)
(
Qatar University
, 1994 , Article)
The reproductive cycle, gonads maturation, gonado-somatic indices (GSI) and fecundity of black-banded seabream Mylio bifasciatus from the Arabian Gulf waters off Qatar were investigated. Bi-weekly samples representing all ...
A critical analysis of "harvest index"
(
Qatar University
, 1993 , Article)
The many ways in which harvest index ratio (HI) can be used are discussed. A selection of published values for HI are given. Attention is drawn to the confusion in calculating the HI such that some present methods of ...
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 ...
Synthesis and biological testing of 2,4-disubstituted thiazole derivatives as Potential antitumor antibiotics
(
Qatar University
, 1994 , Article)
A series of thiazole derivatives bearing amino, acetamido or thioureido synthons at position 2- and thiosemicarbazone or 1,2,4-triazolethione moieties at position 4- have been synthesized and evaluated for their antimicrobial ...