Browsing Qatar University Science Journal - [From 1981 TO 2007] by Title
Now showing items 620-639 of 770
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Seasonal Fluctuations Of Certain Species Of Nocturnal Coleoptera As Indicated By A Light Trap At Quena
( Qatar University , 1985 , Article)1) One light trap of Robinson type fitted with a mercury vapour bulb was operated for two consecutive years. Eighty - three species were identified and counted. The most abundant species was Tachys fumigatus of which over ... -
Seasonal Variations of Acoustic Properties in Ropme Sea Area
( Qatar University , 1993 , Article)Hydrographic data collected in the periods from 1961 to 1988 are used to investigate sound speed distribution in the Regional Organization for Protection of Marine Environment (ROPME) sea area in the Gulf, during four ... -
Sediment Distribution Pattern in the Al-Shoaiba Lagoon, Red Sea Coast of Saudi Arabia
( Qatar University , 2003 , Article)The Al-Shoaiba coastal lagoon located on the eastern side of the Red Sea is covered mostly with calcareous sand and muddy sand. Wind derived quartz is the most abundant detrital component in the surficial sediments of the ... -
Sedimentological And Paleo-Environmental Studies On The Eocene Limestones In The Northern Plateau Of Bahariya Oasis, Western Desert, Egypt
( Qatar University , 1984 , Article)Detailed investigation of the three Eocene formations in the Northern Plateau revealed remarkable differences in their biogenic and lithologic characters. Eleven different microfacies associations have been recognized. ... -
Sedimentological development of the upper pliocene- pleistocene sediments in the areas of el salamony and el sawamha sharq, North East Sohag , Egypt.
( Qatar University , 1995 , Article)The Upper Pliocene- pleistocene Nile sediments cropping out in the areas around El Salamony and El Sawamha Sharq constitute two terraces including five facies ; flood plain , talus and lacustrine facies in the upper terrace ... -
Seismic reflection coefficient parameter-theoretical and Practical approach
( Qatar University , 1994 , Article)In this study, the effect of porosity and pore filler on the reflection coefficient parameter (R), are well deduced and some mathematical expressions were developed. This leads to the establishment of new expression of (R) ... -
Seismic Resolvable Frequency Band For The Pre-Miocene Oil Targets Ras Budran, Gulf Of Suez, Egypt
( Qatar University , 1988 , Article)Seismic attenuation problem in Ras Budran area, Gulf of Suez was tackled by defining the resolvable frequency band. This band can transmit through the Miocene evaporitic cyclic section and hit pre-Miocene oil targets. This ... -
Seismic Risk Evaluation Based on Maximum Likelihood Technique Applied For the Red Sea Region
( Qatar University , 1993 , Article)An analysis of the seismic risk is carried out for the Red Sea region for the recorded earthquakes in the area between 1. January 1913 and 31 December 1982. The maximum likelihood method was applied to determine the hazard ... -
Selectivity Coefficient Of Wire Basket Traps For Tilapia Nilotica
( Qatar University , 1984 , Article)Most methods of estimating growth and mortality rates require samples representative of the population with respect to size of one or more age groups. There is no fishing gear that exhibits equal selectivity towards fish ... -
Sem Studies On Facilitated Microbial Growth On Pac In A Biological Reactor
( Qatar University , 1996 , Article)A process known as powdered activated carbon (PAC) treatment was applied to facilitate additional bacterial growth in the treatment of industrial wastewater. Refinery wastewater was fed into a pilot plant reactor at a rate ... -
Senso-Neuroendocrine Cells Within The Cerebral Ganglion Of The Earthworm Aporrectodea Caliginosa
( Qatar University , 1992 , Article)Ciliated neurones of probable endocrine function are present inside and outside the cerebral ganglion of the earthworm Aporrectodea caliginosa. Cell fibers contain clusters ofsynaptoid vesicles in regions adjacent to the ... -
Separation and preconcentration of malathion and azamethiphos by Unloaded polyurethane foams
( Qatar University , 1994 , Article)The feasibility of using unloaded polyether type polyurethahe foams for the extraction and separation of malathion and azamethiphos in batch and column operations has been examined. The effects of pH, ionic strength, shaking ... -
Separation of Two Forms of Extracellular p-glucosidase From a Thermotolerant Aspergillus niveus
( Qatar University , 2003 , Article)Two forms of P-glucosidase ((3-D-glucoside glucohydrolase, EC 3.2.1.21) from the culture filtrate of Aspergillus niveus were separated and partially purified by gel chromatography on Sephadex G-100 column. The two forms ... -
Sequence Of Ossification In The Skeleton Of Growing Lizard Chalcides Ocellatus Forscal (Scincidae, Reptilia)
( Qatar University , 1988 , Article)The distribution of cartilaginous and ossification rudiments were described in the live-bearing lizards, Chalcides ocellatus, at birth, one-month-old, and 12-month-old. The skeletal elements investigated are: neurocranium, ... -
Serum And Tissue Enzymes And Trace Elements In Hamsters With Schistosomiasis Mansoni And/Or Protein Energy Malnutrition
( Qatar University , 1996 , Article)Schistosomiasis is mostly widespread in communities suffering from protein energy malnutrition. The development of an animal model for each condition is required for better understanding of changes in certain biochemical ... -
A Short Note On The Point-Wise Summability Of The Conjugate Series Of A Fourier Series In The Norlund Sense
( Qatar University , 1985 , Article)In this note we consider an analogous theorem of [l] in the sense of point-wise summability of the conjugate series of a Fourier series in the Norlund sense -
A Simple Diagram For Gravity Interpretation By Gradients For A Lateral Varying Formation
( Qatar University , 1984 , Article)A simple diagram is constructed for the interpretation of the gravity anomaly arising from a formation of linear density variation. The diagram can be easily used if the horizontal gradient is also known. With the help of ... -
Single Cell Protein Production From Beet Pulp By Mixed Culture
( Qatar University , 1992 , Article)A mixed culture of Trichoderma reeseiand Kluyveromyces marxianuswas found to be more efficient for single cell protein (SCP) production (51%) from beet pulp (BP) than the other tested mixed cultures containing T. reeseior ... -
SOIL FUNGI ARE AN ACTIVE PARTNER OF OUR ECOSYSTEM. THEIR BIODIVERSITY AND ACTIVITIES SHOULD BE APPRECIATED*
( Qatar University , 1995 , Article)Soil fungi play an active role in the maintenance and functioning of ecosystems around man. This paper is an appreciation of their bio¬diversity and activities at the global and Arab world levels. Microorganisms merit ... -
Solid-State Ac-Conductivity Analysis For The Long Debated Catalytic Activity Of The Boralite Sieve
( Qatar University , 1996 , Article)The ac-phase dependent impedance, capacitance and dielectric loss of boralite are measured and correlated with those of a similar history HZSM-5 as a function of frequency (0.1-100 kHz) and temperature (373-638 K) at 0.8 ...