Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 580-599 of 770
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A Qualitative And Quantitative Survey On The Helminth Parasites Of Fishes From The Aswan High Dam Lake In Egypt
( Qatar University , 1984 , Article)The present investigation is concerned with a helminthological survey of 19 species of fish collected along different seasons from the Aswan High Dam Lake in the southernmost part of Egypt. 615 out of 850 fish (72.4%) are ... -
A Qualitative Approach to Direct Inference Principle
( Qatar University , 2002 , Article)In this paper,we study the suitability of a symbolic model of syllogistic reasoning and direct inference principle with the representation and the management of knowledge based on statistical information and evaluated in ... -
Qualitative Dealing with Quantified Assertions
( Qatar University , 2002 , Article)In this paper we present a newapproach to a symbolic treatment ofquan-tified statements having the following form "Q A's are 5's", knowing that A and B are labels denoting sets,and Q is a linguistic quantifier interpreted ... -
A Random Binary Trees Generation Method
( Qatar University , 2000 , Article)There are two widely used random distributions on binary trees, namely the binary search tree distribution and the uniform distribution. By analyzing the performance of algorithms that manipulate binary trees generated at ... -
A Rational Exponential Model for Unconstrained Non-Linear Optimization
( Qatar University , 2002 , Article)In this Paper, a new algorithm based on the non-quadratic model is suggested for solving unconstrained optimization problems which modifies the classical conjugate gradiant methods. This technique has the same properties ... -
A rational logarithmic model for unconstrained non-linear optimization
( Qatar University , 1997 , Article)A new non-quadratic model is proposed for solving unconstrained optimisation problems which modifies and develops the classical conjugate gradient methods. The technique has the same properties as the classical conjugate ... -
Rayn formation, a new name for the permian khuff formation (S. S.) In saudi arabia
( Qatar University , 1991 , Article)The rank of the Khuff Formation (late Carboniferous-late Permian) in Saudi Arabia is raised to group status and it is divided into Unayzah (late Carboniferous-early Permian) and Rayn (middle-late Permian) Formations. The ... -
Recent Benthic Foraminifera from the Local Water of Qatar, Arabian Gulf
( Qatar University , 2000 , Article)ABSTRACT In the present study, fifty species of Foraminifera are identified from the bottom sediments of the local Qatari waters on the eastern and northern sides of Qatar Peninsula in the Arabian Gulf. These comprise 7 ... -
Record of a fruiticose lichen, Ramalina farinacea (L.) Ach. for Qatar
( Qatar University , 1997 , Article)Lichens are thallophytic lower plants. Ramalina farinacea (L.) Ach., family Ramalinaceae, is the only fruticose lichen recorded in Qatar. It occurs on stony terrain bordering the coastline in association with other more ... -
Records of Marine Interstitial Hymenostomatid Ciliates from the Jubail Marine Wildlife Sanctuary, Saudi Arabia
( Qatar University , 1999 , Article)Sediment samples were collected at low tide from various localities of Jubail Marine Wildlife Sanctuary in the Arabian Gulf during 1996-1997 for the study of the marine interstitial ciliate fauna of the Sanctuary. Eleven ... -
Red cell superoxide dismutase in patients with different liver diseases
( Qatar University , 1995 , Article)Supcroxidc dismutase (SODs, supcroxidc oxidoreductasc, E.C. 1.15.1.1.) activity has been estimated in red blood cells from patients suffering from liver cirrhosis and hcpatoccllular carcinoma. Erythrocytcs supcroxide ... -
Regeneration from different levels along the tail of the geckonid lizard, Bunopus tuberculatus
( Qatar University , 1994 , Article)Study of the influence or amputation level on regenerate length, elongation rate and mitotic index of the tail of the geckonid lizard, Bunopus tuberculatus revealed that the tails amputated such that three-fourth, or ... -
Regeneration of the vagus nerve after highly selective vagotomy, an autoradiographic study in the ferret stomach .
( Qatar University , 1995 , Article)This study investigates the regeneration of the vagal nerve fibres after highly selective vagotomy in the ferret stomach by using the autoradiographic technique. Autoradiographic examination of the body of the stomach in ... -
Regeneration of Transformed Forage Legume Plants by Agrobacterium rhizogenes R1601
( Qatar University , 2003 , Article)Transformed forage legume plants (alfalfa & clover) by genetic engineering bacteria Agrobacterium rhizogenes R1601,were regenerated directly from seedling plants after inoculating the wounded site formed by cutting the ... -
Regenerative abnormalities in hind limbs of bufo regularis induced by repeated amputations: I. Early larval stages
( Qatar University , 1993 , Article)The regenerative response of the hind limbs of early larval stages: 52, 53, 54 and 55 of Bufo regularis was studied following repeated amputations at the ankle level. The pattern of morphogenesis as well as skeletal ... -
Regional catecholamine concentrations in brain and spinal cord of male albino rats treated with the synthetic pyrethroid cyfluthrine
( Qatar University , 1997 , Article)The principal objective of this study was to determine the modifications induced by the synthetic pyrethroid insecticide cyfluthrin in the concentrations of dopamine (DA), norepinephrine (NE) and epinephrine(E) in selected ... -
Relation between Quasi-normed Ideals of Entropy Numbers and of Approximation Numbers
( Qatar University , 1981 , Article)Let en(T) and an(T) be the entropy numbers and approximation numbers of operator T between Banach spaces, respectively. Let ?p be the operator ideal defined by Sp:^TeL;{en(T)^lp}, and Sp be the operator ideal defined ... -
The relationship between heavy metal concentration and soil mycoflora in the Gizan region, Saudi Arabia
( Qatar University , 1997 , Article)Soil samples were collected from different places from the Gizan region, Saudi Arabia, and analyzed mechanically and chemically for mineral content. The soils were highly alkaline and sandy in texture in all cases. The ... -
A Remark On Proper Left H* — Algebras
( Qatar University , 1984 , Article)W. Ambrose gave the theory of proper H* -algebras and M. Smiley in (2) gave an example of a left H* -algebra which is not a two-sided H* -algebra. Then he modified some of the arguments of Ambrose which yield the structure ... -
Remarks On S-Closed Spaces
( Qatar University , 1986 , Article)In this paper, several characterizations for s-closed spaces are obtained using regular semiclosed sets and some sets having two properties of near openness and near closedness in the same time. Images of s-closed spaces ...
