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Now showing items 1201-1210 of 1381
Intensive shrimp Penaeus semisulcatus Dee Haan, culture in the Arabian Gulf during the summer
(
Qatar University
, 1999 , Article)
P. semisulcatus juveniles (average weight 9.7g) from Manifa Lagoon on the Arabian Gulf were randomly stocked in tanks (0.8m3) at three stocking density levels (25, 50 and 75 shrimp/m3) in four replicates.
The tanks were ...
Separation and preconcentration of malathion and azamethiphos by Unloaded polyurethane foams
(
Qatar University
, 1994 , Article)
The feasibility of using unloaded polyether type polyurethahe foams for the extraction and separation of malathion and azamethiphos in batch and column operations has been examined. The effects of pH, ionic strength, shaking ...
Parasites As Indicators Of Environmental Change And Pollution In Marine Ecosystems
(
Qatar University
, 1999 , Article)
Good biological indicators to monitor the effects of pollutants on marine organisms must be exceptionally sensitive to environmental change so that a significant reduction in their numbers can be used as a warning of ...
Interpretatin of geopotential field anomalies in area Around Sohag, Egypt
(
Qatar University
, 1995 , Article)
The investigated area Ues in the central part of Egypt (around Sohag). The present study aims at obtaining information about the subsurface geological conditions in the area from the analysis and interpretation of both ...
ECG Abnormalities Induced By Scorpion Venom Administration: The Effect And The Mechanism
(
Qatar University
, 1994 , Article)
Intramuscular administration of scorpion (Leiurus quinquestriatus) lyophilized venom (100, 200 and 400 mg/kg) into rats produced drastic changes in the electrical activity of the cardiac muscle. These abnormalities were ...
Electrophoretic patterns of proteins and enzymes in paramphistomum (p.) Microbothrium and carmyerius gregarius
(
Qatar University
, 1990 , Article)
The electrophoretic patterns of total soluble proteins, esterases, Glutamic-oxaloacetate transaminase (GOT) and malate dehydrogenase (MDH) are determined in two paramphistomes, infecting cows and buffaloes, namely ...
Approximating the Distribution of Quadratic Forms Using Orthogonal Polynomials
(
Qatar University
, 1999 , Article)
In this paper we propose some techniques to approximate the distribution of quadratic forms in normal random variables. The first two techniques will be based on orthogonal polynomials, namely; the Hermitte and Laguerre ...
Scanning electron microscopy of hymenolepis nana and h. Diminuta from natural infections
(
Qatar University
, 1992 , Article)
The surface ultrastructure of two cestodes: Hymenolepis nana and H. diminuta was studied by scanning electron microscopy. The scolex, suckers, rostellum and strobila are all covered with dense populations of microtriches ...
Mineralogical and Chemical Properties of El-Fa Youm Clays
(
Qatar University
, 1993 , Article)
El-Batts Demo Area constitutes a part of El-Fayoum province in Egypt, it is dominated by clay formations 17 meters thickness, covered in part by a thin layer of Pleistocene deposits.
XRD studies reveal that smectite is ...
Krein's method for solving the integral equation of the first kind With logarithmic kernel
(
Qatar University
, 1993 , Article)
Consider the Fredholm's integral equation of the first kind with logarithmic kernel K(IXI) = (- In Ixl. The aim of this paper is to establish the equivalence of Krein's method of solving the equation with the following ...