Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 104-123 of 770
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Comparative Growth Performance and Feed Utilization of Four Local Strains of Nile Tilapia (Oreochromis niloticus L.) Collected From Different Locations in Egypt
( Qatar University , 2003 , Article)Brood stocks of Nile tilapia (Oreochromis niloticus L.) were collected from Lakes ofNasser (Aswan), Manzalah, Maryut and Abbassa fishponds. Fingerlings ofFI of each strain was fed diet containing 27% CP for 90 days. The ... -
Comparative Histopathological Studies On The Effects Of Ionizing X-Ray Irradiation On Normal Liver And Hepatoma
( Qatar University , 1984 , Article)Normal mice exposed to X-rays showed distinct external symptoms and died mostly on the 13th or 14th day after irradiation. Pathological symptoms were more exaggerated in mice diseased with hepatoma and subjected to the ... -
Comparative studies of the oil from silybum marianum cultivated in Egypt using glc
( Qatar University , 1994 , Article)Quantitative comparative study of the oil fraction constituents in the fruits of Silybum marianum successfully cultivated in new reclaimed land with those of the two wild types viz., purple flower and white flower bearing ... -
Comparative Study of 11 Honey Samples Sold in Riyadh Saudi Arabia
( Qatar University , 2006 , Article)11 honey various samples commercially available in Saudi Arabia, were subjected to chemical, toxicological and bacteriological tests. The samples were checked for As and CN, presence of pollens, and for bacteria contamination. ... -
Comparative study of organic and inorganic fertilizers on forage corn (Zea mays l.) Grown on two soil types
( Qatar University , 2001 , Article)Two pot experiments were conducted in 1995/96 and 1996/97 to investigate the interactive effects of organic and inorganic fertilizers applied to two soil types on the performance of corn (Zea mays L.). The soil types were ... -
A comparative study of the effects of clumping, substrate, light, depth of burial and soil moisture upon the germination of seeds of weeds and crops grown in the sudan gezira.
( Qatar University , 1985 , Article)The influence of the number of seeds per clump upon germination of oryza sativa L., Gossypium hirsutum L., Brachiaria eruciformis (Sm.) Griseb, Dinbera retroflexa (Vahl) Panz. and Echinochloa colonum (L.) Link was investigated ... -
A comparative study of the mechanical properties of low Density polyethylene (ldpe)
( Qatar University , 1997 , Article)Mechanical properties of engineering polymers which are the most important properties for design and construction purposes are diverse. This has been proved by investigation tensile properties of different grades of LDPE ... -
Comparison of antibiotic susceptibilities of four species of coagulase-negative staphylococci isolated rom normal skin and acne Lesions: a statistical approach
( Qatar University , 1996 , Article)Ten strains of each of four species of coagulase negative staphylococci: S. epidermidis, S. hominis, S. capitis, and S. cohnii isolated from both acne lesion and normal skin (total 80 strains) were tested for their antibiotic ... -
Comparison of body mass, feeding and food conversion of temperature acclimatized Porcellionides pruinosus (Brandt, 1833) (Isopoda, Oniscidea) fed on the dry leaf of Punica granatum
( Qatar University , 2006 , Article)A detailed study was conducted on the body mass; moisture; assimilation efficiency; gross and net production efficiencies; feeding, assimilation; conversion and metabolic rates of the woodlouse Porcellionides pruinosus ... -
Comparison of mechanical shaking, ultrasonication and Homogenization as techniques used in removing attached Bacteria and their effects on the associated protozoa
( Qatar University , 1994 , Article)During studying of Protozoa in the slow sand filter beds in Ashford Common Water Treatment Work (London, U.K.), it was found necessary to study the interstitial and attached bacterial populations involved with sand particles, ... -
Completeness Of Distributive P-Algebras
( Qatar University , 1988 , Article)According to the triple characterization of distributive p-algebras which is given by T. Katrinak, we characterize the completeness of distributive p-algebras. -
The Complexation of Lanthanides by Azo-B-Diketones Stability Constants
( Qatar University , 1982 , Article)The stability constants of the complexes between the trivalent lanthanide series of cations and series of azo-B-diketone ligands are reported. The measurements were conducted at 30°C and zero ionic strength (free KN03), ... -
Concentration of Some Heavy Metals in Short Cores in the Nearshore Sediments of Alexandria , Egypt
( Qatar University , 2006 , Article)The Western Harbor, Eastern Harbor and Abu Qir Bay are three sites located along the Alexandria coast. These sites are characterized by extensive maritime and industrial activities. To investigate the penetration of heavy ... -
Concerning Sequential Spaces
( Qatar University , 1985 , Article)In this paper, important notions concerning sequential spaces are clarified new ideas, one of which is a complete and direct proof of the fundamental theorem characterizing sequential spaces, are introduced. -
Condition and trend of a depression-type habitat In rainfed desert rangelands of Qatar In response to fertilizer application
( Qatar University , 1994 , Article)Characteristics of a rainfed depression-type habitat in desert ranges, and its response to fertilizer application were studied. A single fertilizer application at a rate of 75 Kg ha1 prior to the rainy season improved range ... -
Conditionally Exponential Convex Functions On Locally Compact Groups
( Qatar University , 1993 , Article)The main objectives of this study are: 1) The construction of a compact base for the convex cone of all conditionally exponential convex functions. The determination of the extreme parts of this cone. -
Conductance Measurements in Corrosion Studies of Aluminium
( Qatar University , 1994 , Article)A new method is suggested for studying the rates of dissolution of oxide film on aluminium and its alloys. The method is based on measuring the conductance between two aluminium (or its alloys) electrodes immersed in 3.0 ... -
Congenital Anomalies in Down Syndrome Among Qatari Population
( Qatar University , 2006 , Article)Down Syndrome (DS) is the major cause of mental retardation and congenital heart disease affecting the welfare of over 300,000 individuals and their families in USA. The aim of the study is to see which are the most common ... -
Constituents of catha edulis (alkaloids, triterpenoids and related substances and saponins)
( Qatar University , 1989 , Article)The study of the alkaloids of khat samples from Egypt and Yemen revealed qualitative and quantitative differences. Cathine and the dimer of cathinone occured in both samples, while norephedine was detected only in Yemen ... -
Constituents Of Centaurea Species
( Qatar University , 1992 , Article)A comprehensive review of Centaurea species including all the isolated consituents is given. The biological activities of the studied species are also reported.