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السجلات المعروضة 11 -- 20 من 113
Effects Of Chemical Pesticides On The Gravid Females And Stadia Of The Woodlouse, Porcellio Scaber (Latreille) (Isopoda, Oniscidea)
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Qatar University
, 1991 , Article)
Studies were made on the mortality rates of the gravid females, and on the survival and growth rates of the stadia of the woodlouse Porcellio scaber (Latreille) exposed for a period of 21 days to sub-lethal concentrations ...
Ultrastructural Study Of Type "B" Neurosecretory Cells In The Earthworm Nervous System
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Qatar University
, 1991 , Article)
Neurosecretory cell types Bi—B5 are widely distributed throughout the cerebral, subesophageal, nerve cord and peripheral ganglia of the oligochaete Aporrectodea caliginosa, Lumbricus terrestris, Eisenia foetida, Octolasion ...
Evaluation Of Hydraulic Parameters For Dara Area (Gulf Of Suez), Egypt
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Qatar University
, 1991 , Article)
This work aims to furnish a basis for evaluating the water resources in Dara Area which is one of the vergin areas assigned for the purpose of land reclamation. Analysis of pumping and recovery tests performed in the study ...
Calculation Of Mass Yield Distributions In Fission Induced By High Energy Protons
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Qatar University
, 1991 , Article)
An analytical expression is obtained for the mass-yield distribution in fission induced by high-energy protons, using a two-step model. In the first step, the incident proton penetrates the target nucleus, knocking out ...
The image of the city in American drama
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Qatar University
, 1991 , Article)
Functional adaptations of fig trees (ficus carica, l.) In agroecosystems of the western mediterranean desert of Egypt.
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Qatar University
, 1991 , Article)
The ecophysiological characteristics of fig (Fi'cus carica, L.) trees, growing with maximum activity during the hot and dry summer, were studied in relation to growth, carbon partitioning, nutrient balance and water use. ...
The Antibiotic Activity Of Some Aquatic Plants And Algal Extracts From Jordan
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Qatar University
, 1991 , Article)
The antimicrobial activity of the extracts of three fresh water green algae, four marine green algae, two brown marine algae and five red marine algae from the Jordanian part of the Aqaba Gulf, together with four aquatic ...
Diagonalizable Indefinite Integral Quadratic Forms
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Qatar University
, 1991 , Article)
This paper deals with some special cases on Hasse's principle about the diagonalization of Z-lattices L of indefinite regular guadratic forms over Q. It is asserted that for some specific values of a certain set D of ...
A Computer Aided Design Tool For Area Optimization Using Breadth First Search Technique
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Qatar University
, 1991 , Article)
Floorplanning is the process of partitioning an area on any surface such that the partitions guarantee minimum wasted area. The technique used to partition a given are depends on the requirements of the application. In an ...
Late Maastrichtian And Paleocene Calcareous Nannofossils From Ain Dabadib Section, Nw Kharga Oasis, Egypt
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Qatar University
, 1991 , Article)
On terms of calcareous nannofossils, the late Maastrichtian and Paleocene sediments were subdivided into several biozones. The Cretaceous-Tertiary boundary is marked by a hiatus concerning the latest Maastrichtian and the ...