Browsing QU Ceased Journals by Title
Now showing items 876-895 of 2240
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Refrigerants Beyond 1995 - An Overview
( Qatar University , 1994 , Article)The count down has started. Less than 400 days, that is all the time left till the complete phase-out of CFC production. No more refrigerants R-l 1, R-12 or R-500 will be produced worldwide. With our extreme dependence - ... -
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 attitudes and achievemet in SL ( a case study of students at the University of Qatar)
( Qatar University , 1998 , Article)Attitudes and motivation are considered important factors in Language Acquisition (LA). Learners' attitudes towards speakers ofTarget Language (TL) and the TLitselfhave been the subject of intensive research in applied ... -
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 ... -
Relative Contribution of Organizational Factors to the Discriminant Functions Associated with Corporate Performance
( Qatar University , 1999 , Article)This research presents an empirical investigation of the relative contribution of four dimensions of corporate performance to the discriminant function associated with sample of high-performing companies and another sample ... -
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 ... -
Renal Structural And Physiological Alterations Subsequent To Unilateral Ureteral Obstruction
( Qatar University , 1992 , Article)Complete obstruction of the right ureter of male rabbits for eight weeks resulted in filling of the obstructed kidney with clear urine, no precipitation or stone formation. The calyces and pelvis were distinctly dilated ... -
Repetitive Control Based Pwm Inverter Dead-Time Compensation For Ac Servo Drive
( Qatar University , 2002 , Article)AC servomotor speed or current controller based on PI control and/or optimal control, can not eliminate the cyclical fluctuations of speed or current when subject to periodic disturbances. However, repetitive control ... -
The Reproducing Capacity of Gamma Irradiated Adults of Trogoderma Versicolor (Creutz)
( Qatar University , 1993 , Article)Male and female, Trogoderma versicolor (Creutz.) were irradiated by gamma radiation as newly emerged adults (12-24 hrs. after emergence). Males required higher doses than females to be sterilized and the reproductive ... -
Reproducing Formula and Algorithm of a Familv of Biorthonormal Wavelets
( Qatar University , 2005 , Article)In this paper we present a family of biorthonormal wavelets generated by a MRA orthonormal wavelet, which possesses two arbitrary parameters. Then we discuss new expressions of reproducing kernel as well as the corresponding ... -
Reproductive ecology of the common rock chiton Acanthopleura gemmata (mollusca: polyplacophora) in the Northwestern coast of the red sea
( Qatar University , 1996 , Article)The reproductive cycle of the chiton, Acanthopleura gemmata was studied by observing the gonad indices at two localities in the North-western coast of the Red Sea, from January 1988 to December, 1989. The interrelationships ... -
Response of Date Palm Pollen Tube Growth to Storage Period and Conditions
( Qatar University , 1994 , Article)The growth rate of pollen tube of date palm (Pheonix dactylifera L.) pollen grains stored either freeze-dried or unfreeze-dried at 25, 4 and - 8°C was measured after 3,7 and 12 months of storage. The growth of pollen tube ... -
Response of Nile Phytoplankton to Algicide (CuSO4, 5H2O) In Multispecies Chemostat Experiments
( Qatar University , 1994 , Article)The addition of CuSO4 . 5H2O (algicide) to cultures of phytoplankton populations from the river Nile, grown under steady-state conditions using chemostat, resulted in remarkable alterations in species composition, total ... -
A Review of Fatigue Testing Machines
( Qatar University , 1990 , Article)In this paper fatigue testing facilities are first classified in accordance with a number of features which include purpose, type of loading, method of load application and transmittal as well as control system. Owing to ...