JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)
Year:2000 | Volume:10 | Issue:37|Papers Count:9

One equivalent of nickel (II) chloride, NiCI2, with two equivalent of sodium or lithium salt of 2 - (benzylamino) pyridine (NaBAP or LiBAP) in THF leads to the formation of dark red solution. After filteration, some hexane was added as a layer. The residual of NaCI or LiCI separated out after 24 hours. After filteration, the light brownish microcrystalline compound separated upon standing overnight at-10°C after 24 hours. Several recystallization of this compound gives dark red brownish microcrystalline complex. Analytical data, molecular weight, and magnetic susceptibility of this complex confirm the formula [Ni(BAP)2]2 .

The effect of morphine on learning and memory is a controversial issue. High density of opioid receptors in receptors in fundamental centers related to learning and memory such as hippocampus indicates the excitence of a relationship between opioid receptors and memory process. In this research, effects of opioids on consolidation and retention of memory are evaluated. Different doses of morphine and naloxone are injected in CA! region of dorsal hippocampus. The level of effects of drugs on consolidation of memory is studied by passive avoidance task and time in dark compartment (TDC) and step-through latency (STL) are measured. These results show that morphine decreases and naloxone increases memory process and retention by dose - dependent manner. Endogenous opioid peptides .probably modulate consolidation by interactions with cholinergic and noradrenergic system.

The Qom depression-Daryacheh ye Namak evaporatic basin is one of the extentional Neogene basins which is formed in a compressional regime in accordance with opening up of the Red Sea. The lightfaces of Miocene Sedimentary units, especially the Upper Red Formation, show subcontinent al-continental environment. The above mentionad basin in feeded by erosion of surrounding reliefs which are limited by fault boundaries in vicinity of Qom depression-Daryacheh ye Namak evaporatic basin. The outcrops evidences in the faults, controlling boundaries of the basin, such as calcareous boudins (often Qom Formation) along Siah kuh fault in the esat, Qom-Ravand fault in west and Maranjflb-Sefidab fault in south of the basin indicate a variation from transtension to transpression. These structural evolutions are in accordance with rotational of the blocks surrounding the basin. The characteristics of the Qom depression-Daryacheh ye Namak evaporatic basin indicate a pull apart basin formed by the activity of the Qom-Ravand basement curved fault. The study of pull apart basins are interesting not only as the view point of tectonic characteristics but also economic potentials, in this manner the Qom depression is not exception.

Sahand volcanic massif settled to the northwest of Iran between Tabriz in north and Maragheh in south. This area has the most greater thickness of crust (46-48km) and isostatic equivalence. Gravity measurement shows a positive gravity anomaly to the south of this area which is connected to deep igneous massif or metamorphic basement. Sahand sedimentary basement formed from the sediments of different period which its parts appear in 3100 high in the end of Chiniblagchary valley. The study of Sahand volcanic rocks showes that there are three kind of magma in Sahand volcanism: and esite and basaltic land site of upper Miocene, dacitic magmas and magmas rich of K. B. a,Sr with composition of latite or banakite in the end of sahand activity. Tectonic structures are exteud N-W- SE trend that created by compressional and extentional forces with trend of NE-SE. By attention to sheare perspiration of northwest of Iran the exicrence of strick-slip faults specialy Tabriz fault in this area plio-quaternary volcanism of Sahand volcanic massif to pull-apart basins which are formed in trend of ancillary faults of Tabriz fault by collisional tectonic regim in different trends.

In general, Impurities with low, medium and high Z and their effects play an important role in Tokamak discharges and having more information about impurities, their effects, density and confinement are very important. In this paper, we discuss general aspects of these impurities, in general sawtooth oscillation observation in line radiation in low ionization regime in the edge of Tokamak plasma in Iran-Tokamak1 (IR-Tl).

Descripitions for the species of Linum pollen grains based on Scanning Electron Microscopic observations are presented. Apertnre types are tricolpate. Tectum ornamentations are flat-topped gemmae in the species of L. bienne and L. usitatissimum and clavate for the rest of species. Three shapes including ellipsoid, spheroid and subspheroid can be distinguished. The studied species belong to five sections and they are including: L. catharticum (Sect. Cathartolinum), L. strictum, L. corymbulosum and L. tenuifolium (Sect. Linastrum), L. album, L. persicum, L. mucronatum and L. nodiflorum (Sect Syllinum), L. densflorum (sect. Dasylinum) L. nervosum, L. bungei, L. glnucum, L. austriacum, L. peyronii, L. bienne L. and L. usitatissimum (Sect. Linum).