فصلنامه پیک نور علوم
پیاپی 3 (پاییز 1386)

The Oxygen and Nitrogen donor ligands produced and then were used for membrane transport of Mn(II), Zn(II), Ni(II) and Cu(II) cations. These ligands were used as cation carrier for competitive metal-ion transport and extraction. In the transport experiments, the source and receiving phases were separated by a chloroform phase and in the extraction experiments chloroform was used as an organic phase. In the part of this study, for the ligands, high soluble property in the water was used for extraction and competitive transport and the ligands were solved in the source phase along cations. After complexation of the ligand by some of cations, transport to organic phase was done and then cations were inserted to receiving phase. The major aim of the present research was finding the selectivity of the ligands incomperiments, transport and extraction experiments between Mn(II), Zn(II), Ni(II) and Cu(II) metal cations. For all of the ligands, first of all, extraction was done at diferent buffers, usually 4.5 - 7 and then proper buffer was choosed for experiments by PH curve vs. percent extraction. Transport was done at the suitable buffer for all of the ligands and the transport curves were drawn. In most of the extraction experiments, there was a similar extraction behavior with the results of the competitive metal-ion transport.

Islamic Peninsula with an area of ~360 km² is located on the eastern coast of lake Urmia on Northwest of Iran. This Peninsula is a complex stratovolcane with a collapsed center, which is elevated due to the later intrusions of subvolcanic masses with trachytic to microsyenitic composition. The composite cone of the volcano is consisted of a sequence of leucite tephrite, tephrite, leucite basanite, basanite and related pyroclastic rocks. The sequence of magmatic activities in this peninsula begin with alkaline potassic to ultrapotassic and basic, silica-undersaturated shoshonitic rocks which follows by intrusion of lamprophyric dykes and ends with acidic magmatism including trachytic, microsyenite, syenitic and phonolitic domes. The original magmas of the Islamic Peninsula rocks had an alkaline potassic nature, which was enriched in LREE and LILE with depletion in HREE. This characteristic is resulting from origination of magma from deep mantle with garnet lherzolite composition with low partial melting rate, which is contaminated by crustal materials in its way up. The survey of geodynamical Situation discriminant diagrams for Islamic peninsula rocks showe that these rocks are formed in a post-collision magmatic arc setting.

In this Study, the glass samples of binary system V2O5 – CdO with different compositions in air with cooling the melt of samples quickly is Conducted. Then the optical absorption spectra of samples in uv-vis region were recorded with an uv-vis spectrophotometer (Cecil –Ce 5501 Model). Eopt and ΔE respectively, are between 1.937ev to 2.730 ev and 0.37ev to 0.57ev are as the V2O5 content decreases from 10 to 25 percent in binary system V2O5 – CdO. Following optical absorption characteristics of binary system V2O5 – CdO the switching phenomenon has been investigated and memory switching at high electrical field was observed.

The interactions of Dibenzo-18-Crown-6 (DB18C6) with Sodium and Potassium cations in Acetonitrile–Dimethylformamide and Dimethylformamide-Tetrahydrofuran binary mixtures at different temperatures were Studied with conductometric method. The stochiometry and the stability constant of the 1:1 complexes were determined by using the variation of the molar conductivity versus ligand /cation mole ratio. The findings show that the stochiometry of the complexes is 1:1 in all cases and the stability constant of the complexes depends on the nature and composition of the mixed solvents.

According to benthonic smaller Foraminifera a biozonal subdivisions of Kubergandian, Murgabian, Midian, Dzhulfian and Dorashamian stages of Permian rocks of East and West Azarbijan are given. Nine biozones are established and paleontological features of each biozones are considered. Finally, the corellation of the new biozones with the coeval biozones of Tethyian realm and Abadeh region are Studied.

Late Devonian conodonts (Bahram and Shishtu Formations) in the north of Kerman (Hojedk section) were studied and fourteen species were recognized which are as follows: Ancyrodella binodosa, Icriodus expansus, Icriodus xenium, Icriodus iowaensis iowaensis, Icriodus cornotus, Icriodus alternatus, Polygnathus alatus, Polygnathus procerus, Polygnathus aequalis, Polygnathus webbi, Polygnathus brevilaminus, Polygnathus semicostatus, Polygnathus politus, Pelekysgnathus inclinatus

In this synthesis, First of all from the reaction of B. diketons on primary and Secondary amines in ethanol, enaminon is produced, and the second stage ids the reaction between synthesized enaminons and ditertio buty Lacetylen dicarboxy late and dimethy lacety len dicarboxylate in an aprotic solvent.

Protease enzymes which are very important in different industries, change proteins to simple ingredients and Aminoacids. enzymes in wide varieties of industries such as pharmacy, food, medical, etc. Many kinds of bacteria such as Bacillus spp and Aearomonsa spp have the ability to produce these enzymes. In this research, samples have been taken from southern area of Caspian Sea in order to detach the proteolytic bacteria and culture were made from these samples on the milk agar. Then samples Were incubated for 48 hours, at 30˚C. Then the clones have been considered numerically, morphologically & Physiologically. In the next stage in order to detach of bacterial protease, the detached protease positive bacteria in skim milk 1% medium were cultivated and kept at 30 C o for 13 days with shaking at 150 rpm. After that samples were put in centrifuge at 1000 rpm for 10 minutes, Azokasein 2%, was added as substrate, sodium buffer phosphate 10% Tricloro acetic acid 1M and absorption was read in 595 nm and protein concentration was calculated in Brad ford method. Therefore purified sample was in SDS- PAGE method and in the next stage in order to gain optimized PH, salt density variation, and temperature effects on enzyme production were deliberated. One of those bacteria had a higher ability to produce Protease under that condition. The Further results of genus and species showed that the final bacteria is Flavimonas oryzihabitans. The best result to produce the enzyme, demonstrated at 30˚C pH 7.2 and salt concentration at 0.2 – 2.5 M.