crystallization of aluminum fluoride at atmospheric pressure has been considered. structure, size and shape of crystals formed during the crystallization process have been investigated. by applying the direct analysis method for the existed aluminum in solution, the aluminum fluoride nucleation process has been detected as a concentration valley at the outset of crystallization process. the lin...

this paper reports on an exploratory study that explores the instructional patterns within english as a foreign language (efl) secondary school classrooms in syria. recently, the syrian ministry of education (moe) has introduced a new national curriculum which recommends a shift in efl teachers’ instructional practices. despite this costly innovation, there has been no attempt to check whether ...

the present study, on the one hand, attempted to investigate the strategies applied in dispreferred responses by iranian university students of english and the extent to which pragmatic transfer could occur.  on the other hand, the study aimed to probe into the association between dispreferred organization and turn-shape. to this end, 31 relevant naturally occurring conversations, totaling 120 ...

conformational properties of n-aryl-1-azacyclooctan-5- ones with a p-methyl, m-methyl, and p-methoxy group as a substituent have been studied by 1h-nmr, 13c-nmr and ir spectroscopies. transannular interaction of the two functional groups have been examined from the ring inversion barriers and the carbonyl vibrational frequencies with reference to the corresponding data of the respective monofun...

conclusions consequently, small diameter scnt interaction with nucleic acid bases is noncovalent. also, the results revealed that small diameter scnt interaction especially scnt (4, 4) with nucleic acid bases can be useful in practical application area of biomedical fields such detection and drug delivery. objectives hence, the quantum mechanics (qm) method based on ab initio was used for this ...

large size direct shear tests (i.e.300 x 300mm) were conducted to investigate the interaction between clay reinforced with geogrids embedded in thin layers of sand. test results for the clay, sand, clay-sand, clay-geogrid, sandgeogrid and clay-sand-geogrid are discussed. thin layers of sand including 4, 6, 8, 10, 12 and 14mm were used to increase the interaction between the clay and the geogrid...

the protonation constant values of salicylic and 5-nitrosalicylic acid werestudied by a combinationof spectrophotometric and potentiometric methods at 25 °c in wide range of ionic strength. the ionicstrength of solutions was kept constant by sodium perchlorate as background electrolyte at 0.10 to 3.0 moldm-3. potentiometer was calibrated according to gran method at each of ionic strength. the p...

in this article, finite element method and ale formulation were used to numerically simulate impact of low-velocity specific projectiles with water surface. for the simulation, ls-dyna finite element code was used. material models which were used to express behavior of air and water included null material model. for the projectile, plastic-kinematics material model was applied. mie-gruneisen eq...

this paper investigates host condition factor, parasite interaction and metal accumulation in tilapia guineesis and host-parasite system in iddo area of lagos lagoon, nigeria. eighty specimens of t. guineensis from the lagoon were caught and dissected for intestinal helminth parasites. condition factors of all individuals were determined. median condition (k<2.62 and k>2.62) were used in groupi...

covering arrays of strength two have been widely studied as combinatorial models of software interaction test suites for pairwise testing. while numerous algorithmic techniques have been developed for the generation of covering arrays with few columns (factors), the construction of covering arrays with many factors and few tests by these techniques is problematic. random generation techniques c...