Browsing Qatar University Science Journal - [From 1981 TO 2007] by Subject "Biology"
Now showing items 1-20 of 30
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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 ... -
Ciliates and Other Microorganisms in the Plankton from Al-Sammaliah Island- Arabian Gulf-United Arab Emirates
( Qatar University , 1999 , Article)Al-Sammaliah Island is one of more than 200 islands belonging to United Arab Emirates in the Arabian Gulf. This inshore shallow island lies at the north east coast of Abu Dhabi and is connected to the Arabian Gulf through ... -
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 ... -
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% ... -
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 ... -
The Flora of The State of Qatar: Its History and Present-Day Status
( Qatar University , 2005 , Article)The history of botanical exploration in the State of Qatar is of recent origin. Various collections culminated in 2 major Floras for the State of Qatar in 1981 and 1983. Since then, further collections and focus on several ... -
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 ... -
Genotoxicity and Embryotoxicity of the Insecticide Primicid in Chick Embryo
( Qatar University , 2000 , Article)Growing chick embryos were treated with primicid to examine the cytogenetic and embryotoxic effects of this insecticide. For the cytogenetic assay, eggs were injected through the air chamber with primicid at a concentration ... -
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 ... -
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 ... -
Night and Early Morning Flying Insects in a Residence Backyard in Doha City, Qatar
( Qatar University , 2006 , Article)Night and early morning flying insects in Doha were recorded daily, for a complete year, using a light-water trap. Two peaks of insect numbers occurred in April-May and September-October periods respectively. The lowest ... -
Nitrogen Transformations as affected by some factors at cultivated soils in Saudi Arabia
( Qatar University , 2001 , Article)The influence of serial concentration of salts (0.5, 1.0 and 1.5%), application of organic matter (0.5, 1.0 and 1.5% of wheat strat) and varying soil moisture content 50, 70 and 90%) on nitrification in sandy loam soil was ...
