Abstract-A series of polyelectrolyte hydrogels ranging from 92-98wt% were synthesized by copolymerization of acrylamide,

AAM with 2-acrylamido-2-methyl propane sulphonic acid, AMPS using 0.001g APS as initiator in the presence of 30wt% H2O

and 1.0wt% ethylene glycol dimethacrylate,EDMA as cross-linking agent. The final copolymers was obtained in the form of

glassy and transparent roads at room temperature, these roads were soaked in water for two days to remove unreacted

monomers. The swelling behavior of the hydrogels was studied in distilled water and salt solutions of 1.5 mol/l each of NaCl

and KCl. The Swelling in water shows decreasing values of q, LE, Ø1, EWC% and increasing polymer volume fraction, Ø2 by

increasing acrylamide, due to increasing hydrophobicity and decreasing the hydrophilicity. The swelling in salt solutions

shows a decreasing in the values of ESSNa%, WCNa%, SCNa%, ESSK%, WCK% and SCK% by increasing acrylamid

monomer in the feed due to increasing the hydrophobicity and decreasing the ionized ionic groups (SO3H). The increasing

values of ESSNa%, WCNa% and SCNa% compared with the values of ESSK%, WCK% and SCK% respectively, is due to

the higher charge density of sodium ion than that of potassium ion.

In order to examine the protection A postulated initiating event is explored step insertion of a positive reactivity in order to investigate the safety of the reactor of the Tajoura Nuclear Research Reactor with Low Enriched Uranium (LEU). These initiated events are:; a reduction of flow of primary coolant; and a loss of flow accident (LOFA) followed by a reversal flow. PARET computer code is implemented to simulate those suggested initiating events. The transient thermal hydraulic analysis is obtained at both the hottest and averaged cells of the core. The simulation is carried out at the operating power of 10 MW and the inlet coolant temperature equals to 45°C. The results exhibit that the worst case of those examined postulated events is by adding a 1.5$ ramp positive reactivity to the core when the resultant maximum clad surface temperature reaches 130.3°C.

The second era of Ottmanian (1835-1911AD) had witnessed a stable economic development and growth due to internal and external policy and because of the reforms achieved by the Ottmanian Empire in all its states. Agriculture is considered a significant formation in the economical growth due to its direct relation to population’s income and effect with people’s needs in any country in the world because agriculture is the main source of food to the people. The agricultural and animal products have played an essential role in the economy of Tripoli at that time, the Ottoman authority was responsible on supervision of farms while the workforce was local people of Tripoli, this situation had led to improve the economical condition of the state and its people, also it was the main source for income to the Ottoman government.

This study highlights the mechanism of formation for Bentonite clay surface properties. It investigates specific gravity and the influence of physicochemical characteristics on clay stability of structural forces on adsorbed water molecules. In particular, it describes the chemical composition, as well as cation exchange capacity (CEC). Bentonite clay is collected from the Murzuq city located 1150 km south of Tripoli i.e. southernmost town of Libya. The CEC value is leached by 500ppm Ca+2 at pH=8 equaled 84.5 mmoles/kg. While at pH=2, the value is (20.5 mmoles/kg). The leaching process is carried out by 500ppm K+ using flame emission photometer. The CEC value at pH =8 for sample is 91.5 mmoles/kg. Also the specific gravity is found to be 2.597. This value is in agreement with the obtained standard values for Wyoming (USA). The % MxOy of the clay is calculated by gravimetric method as follows: SiO2, 53.75; Al2O3, 21.46; Fe2O3, 1.4;CaO, 0.97; MgO, 2.13, and agreed with the XRF analysis as follows: SiO2, 54.93; Al2O3, 21.46; Fe2O3, 1.71; MgO, 3.18 ; CaO, 0.81; Na2O, 5.48; K2O, 0.54; TiO2,0.32. The results are adequately approximate and reasonable for both methods. The percent is very limited for trace elements Pb, Cr, Cd, Cu, Fe, and Zn. In the sample, it is about 0.21%. The result of XRD analysis (intensities) for sample is presented as follows: 50% quartz, 50% kaolinite, 5% Analcine, 7.5% Illite, 5% Natrolite, 10% Nontronite, 7% Montmorillonite. The formula calculation depends on the purity of clay and consequently the structural formula for Libyan Bentonite is: K0.094Na1.45Ca0.118 (Al2.92Fe0.175Ti0.033Mg0.646)VI( Al0.52Si7.48 …

The present research was implemented to analyses the seedling tolerance of three species Eucalyptus gomphocephala DC (Myrtaceae) (common name 'Tuart'), Eucalyptus marginata Sm. (common name 'Jarrah') and Corymbia calophylla (Lindl.) K.D. Hill & J. A. S. Johnson (common name 'Marri') to soil-induced stressor, namely soil alkalinity (limestone). Seeds germinated in shallow trays filled with white sand in a naturally lit glasshouse (control treatment). A liming treatment was conducted with 20% w/w crushed and sifted Tomala limestone adds to potting mix to increase soil pH. The experiment was conducted over 82 days. E. gomphocephala is restricted soils overlying limestone on study area and according to total seedling dry weight data and calculated relative growth rates coped best in a limestone-enriched soil. However, when examining all the growth and physiological data collected C. calophylla appeared to be the middling tolerant, with no significant difference in leaf allocation or leaf water loss between the well-watered controls and the limestone-enriched treatments whereas the E. marginata was the least tolerant with a 14% reduction in stomatal conductance.