تصفح Qatar University Science Journal - [From 1981 TO 2007] حسب الموضوع "بيولوجيا"
السجلات المعروضة 1 -- 20 من 33
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Assessment of Coral Reef Communities At Abu-Dabab, North of Marsa Alam Egypt
( Qatar University , 2003 , Article)The coral reef communities in the area of Abu Dabab, north of Marsa Alam were assessed using rapid underwater technique. Three adjacent reefs were studied to reveal the actual status of the reefs and its damaged parts. ... -
Changes in Soluble Sugars and Proline in Seedlings of A local Wheat Cultivar (Doha) Due to the Salt Stress and Temperature
( Qatar University , 2006 , Article)Germination of grains, and changes in the soluble sugars and proline due to salt stress under three temperatures in the germinating grains, of the local wheat cultivar (Doha) were studied. This cultivar proved resistant ... -
Chemical Factors Affecting Growth and Development of Lateral Root Formation in Isolated Phaseolus vulgaris L.
( Qatar University , 2007 , Article)The initiation and subsequent emergence of lateral roots as secondary roots have been examined in attached and excised roots of Phaseolus vulgaris grown in the absence or presence of indol-3-yl acetic acid (IAA). Treatments ... -
Cloning and Expression of Methionine-enriched Glycinin GY4-Genes in E. Coli
( Qatar University , 2002 , Article)Cloned cDNAs encoding glycinin subunit GY4 was modified to increase methionine content. The effect of the modification was evaluated using an in vitro transcription / translation system. The modifications were carried out ... -
The Coliform Bacteria in the Wastewater Ponds of Doha City, Qatar
( Qatar University , 2003 , Article)The microbiological study of the wastewater and its sediment around Abu-Hamour pond (untreated wastewater pond) and Abu-NakhIa pond (treated wastewater pond), located on the outskirts of Doha City, revealed that coliform ... -
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 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 ... -
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 ... -
Diversity, Habitats and Seasonal Distribution of Fish in Three Protectorates of Southern Sinai on the Red Sea, Egypt
( Qatar University , 2000 , Article)The present investigation is an attempt to study the diversity, habitats and seasonal distribution offish of inshore water at thirteen sites of the three Protectorates (Ras Muhammed, Nabq and Abou Galoum) of Southern Sinai ... -
Does Egypt Represent an Ecological Limit to Desiccation Tolerant Plants?
( Qatar University , 2006 , Article)A search of arid areas adjacent to the Nile in Egypt revealed a notable lack of desiccation tolerant vascular plants on ecological sites on which they would be abundant in Kenya and further south in Africa. Relative water ... -
Ecology and biodiversity profile of the Genus Streptomyces in the soil of the State of Qatar
( Qatar University , 2007 , Article)Ecology and biodiversity profile of Streptomyces in the soil of Qatar have been studied in 123 soil samples from different sites distributed all over the country. Moisture contents of soils samples ranged between 0.2-8.8% ... -
Effect of Rhizohnim melilotti and VA-mycorrhizac on Forage Yield and Quality of Two Alfalfa Cultivars
( Qatar University , 2003 , Article)An experiment was conducted at the Demonstration Farm of the faculty of Agriculture, University of Khartoum at Shambat during the period December 1997 to June, 1999, to investigate the effect of Rhizobium meliloti and ... -
Feeding Behaviour and Food Selection of Dhab Uromastyx microlepis From Wild Vegetation
( Qatar University , 2001 , Article)The present study deals with the food selection and feeding behaviour of Uromastyx microlepis 'dhab' spiny tailed lizard during a period of one complete year inhabiting AL-Gassim desert area. Climatically the area can be ... -
Gamma Irradiation of 4th Instar Larva of Angoumois Grain Moth and Effects on Parent and Their Generations
( Qatar University , 2006 , Article)Late fourth stage larvae of Angomous grain moth, Sitotroga cerealella (Olivier) were gamma irradiated with doses 0 ( control), 25, 50 75, 100, 125 and 150 Gy. The moths originated from larvae irradiated with 150 Gy became ... -
Genetic Studies on Escherichia Coli Strains Isolated From Cases of Bovine Mastttis
( Qatar University , 2007 , Article)This study was carried out on 53 milk samples positive for California Mastitis Test taken from eight herds infected with clinical mastitis in Taif City. Mean Somatic cell Count (SCC) was 4, 482, 000 cells / ml. Forty-eight ... -
Halophytes and Soil Salinity in Qatar
( Qatar University , 2002 , Article)Saline soils cover approximately 6% of the land in Qatar. Halophytes are common along the coastal areas and inland salt flats and wetlands, where saline water is available in their natural habitats permanently or periodically. ... -
Heavy Metals Concentration Levels in some Fish Species in the Red Sea and Gulf of Aden-Yemen
( Qatar University , 2002 , Article)Level of heavy metals (Zn, Cu, Pb, and Cd) in four species of fish; manly, fish, Crenidens Crenidens, Scomberomorus Commerson, Rastrelliger Kanagurta, Thunnus Albacares were studied in the Red Sea of Yemen and the Gulf of ... -
Improvement The Quality of 'Soya Bean Seed Storage Proteins by Genetic Engineering Cdna Encoding G2 Subunit
( Qatar University , 2003 , Article)The goal of this work is to improve nutritional quality of soybean seed proteins by altering cDNA-encoding G2 subunit of Soybean glycinin to be capable of self-assembly in vitro. Two plasmids were constructed; one designated ... -
Isolation and Characterization of Pollulan Produced by a Local Isolate of Aureobasidium Pullulans
( Qatar University , 2000 , Article)A local isolate of Aureobasidium pullulans was obtained from fig leaves surface. The isolate was identified as A. pullulans on the basis of appearance of polymorphism in the colonies, melanin pigment and pullulan production ... -
Meiofaunal Life of Man-Made Wastewater Ponds in Qatar
( Qatar University , 2002 , Article)The meiofaunal life of two wastewater ponds around Doha City was studied for the period October 2000-October 2001. The substrate nature of the two ponds was found to be similar in mean particle sizes but the densities of ...
