JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)
Year:2001 | Volume:10 | Issue:38|Papers Count:8

2,2’ -Dipyridylamine, HDPA, reacts with NaH or MeLi in THF and generates the sodium or lithium salt (NaDPA or LiDPA) respectively. Futher reaction of [Cu(TMEDA)2] [CuCl2] (TMEDA=tetramethylethylenediamine) with one equivalent of this ligand in THF leads to the formation of a yellow dimeric Cu(I) complex, [Cu(DPA)2]. Analytical data, molecular weight, and magnetic susceptibility measurements, confirm the formula [Cu(DPA)]2.

The effects of two levels of N (0,200 kg ha-1) and one level of P (200 kg ha-1) and K (100 kg ha-1) on oil components of leaves and flowering branches in Mentha piperita L. under the farm condition have been evaluated.Increase of N (200/200/100 kg ha-1 as compared with control 0/200/100 kg ha-1of N/P/K), enhanced the amount β -ocimene in oil of leaves (after the flowering period) and flowering branches. Also increase of N reduced linalool and 1,S-cineole in oil of leaves and flowering branches. β -caryophyllene enhanced with the increase of N in flower oil but also reduced in leaves’ oil.  

The studied area is located in central Alborz Range Mountains and is situated in northeast of Tehran. The central Alborz Range is bounded to the north by Caspian Depression, and to the south by central Iranian plateau. After the epirogenic episode of upper permian time, the area of study was covered by an epicontinental sea.The marly limestones and dolomitic limes were deposited under the condition of shallow sea environment. The most important fossils within these rocks indicates trace of animal life and presence of worms which is named as "vermiculate limestones", and it represents the lower member of Elika Formation.In middle Triassic time the conditions of sedimentary environment were generally the same as lower Triassic time, but, due to change of salinity of water, variety of living animals were reduced to fewer kinds and in dolomitic rocks of this Age such fossils as Gastropod a, Pelecepoda and Ostracoda which could live under the saline conditions are more or less rarely preserved as trace fossils. Also, traces and remains of green and blue algae (Cyanophycea) is detected which is indicative of presence of Tidal flat depositional environment,In upper Triassic considerable thickness of alternating layers of evaporites (i. e, gypsum, salt, and dolomite along with marls and clays) occur which shallow marine environment is represented. The geologic setting interpreted by these deposits are tidal - lacustine sediments resulted from subsidence of the sedimentary basin at that time. This depositional environment is also represented as the result of transgression and regression of the sea. In alternation of argillitic marls, the Gyrogonite pelecepoda and microgastropoda is observed and this presence is belonging to the marginal basin environment. The evaporitic facies found in the study area indicates arid and dry climate during the percipitation of these rocks. The sedimentary facies like mudstones along with limestones of wackestone and packs tone types containing abundance of microfossils such as Foraminiferas of: Agathammina austroalpina, Kristian - Tollmann and Tollmann; Earlandia tintinniformis (Misik), Glomospira sp., Glomospirella friedli, Kristian-Tollmann; Trochammina alpina, Kristian - Tollmann; Trocholina sp., Involutina tenuis, (Kristian), Involutina communis, (Kristian); Involutina impressa, (Kristian - Tollmann), Involutina gaschei, (Koehn-Zaninetti and Bronnimann), Involutina gr. sinuosa, sinuosa (Weynschenk) type are found. The above fossils are probably related to upper Ladinian-Carnian Stages. In central Alborz, especially in regions situated in veresk-Sheshroudbar regions, the study of mapped and stratigraphy coloumns from Triassic series are represented by shallow sedimentary sea with corresponding geologic setting of supertidal to subtidal environments, which is: the sabkha-shelf-Iagoonal, shoal and offshore types. The upper member of Triassic limestone, i.e., Veresk member is charachterized by more-marine type of environments, having a more characteristic type of marine type of deposits containing.Foramineferas which has been reported from other parts of Alborz Mountains. The Veresk limestone is underlaid by a disconformity, which on its top lies the conglomerate and red breccia’s of base of Shemshak Formation. This geologic sequence can be interpreted in terms of epirogenic phase related to Early Kimmerian, and due to regression of the sea.

The study location was at 65 Kilometer to the northeast of Isfahan and its whole area was estimated to about 85 square kilometers. the region structure included sedimentary, igneous and metamorphic rocks from mesozoic up to the recent ages. Baslatic to rhyolitic volcanic rocks have heen erupted in Eocene, In OligoMiocene an intrusive body (Garnitoide) was injected to the sedimentary and volcanic rocks, and the metamorphic rocks (skarns and metevolconits) were formed. The study ofmetavolcanic to unmetamorphosed volcanic rocks indicated which minor elements were exchanged between the intrusive body and the volcanic rocks. The presence of some minerals such as andalusite pointed toward a temperature of over 420C (hornblende Hornfelse facies) in the mentioned vicinity.

A Mo high-Power x-ray tube with an optical point focus, followed by a thich Mo filter, irradiates a small and thin sample consisting of 50 .µL of liquid deposited and evaporated on a 4 µ m thick polypropylene film. The x-ray emitted by this sample are detected by a Si(Li) detector placed close to the sample. This arrangement allows one to reach, with a very convenient routine measurement, detection limits in nanogram per milliliter range with total mass at picogram levels. Already hundreds of samples have heen measured under these conditions. A more sophisticated sample preparation (thinner film, very good positioning of the sample, or more than 50µL of solution) decreases the detection limits to picogram per milliliter levels, I.e., picogram of total mass. A prototype has been built with the aime of determining trace elements in samples avlaible in very small quantities. These samples are usually encountered in medicine or in hiologicale experiments on mice. The method is also important for large samples when preconcentration techniques are required. In this case the high sensitivity of the apparatus and the very low limits of detection make possible a direct determination, and thus avoid the contamination risk of the precontraion techniques [1,2]. The manipulation of the sample consists only in the deposition of the solution to be anlyzed on a polypropylene thin film. He purpose of this work is the apparatus characteristics regarding the limits of detection in multi elemental trace metals analysis and applied in human serum.  

The monomer reactivity ratios of Styrene / Acrylonitrile in bulk at 70.0 ±0.1 °c under reduced pressure at low conversion has been investigated by measurement of the copolymer / comonomer composition relationship using 1H-NMR. Fineman - Ross, Inverted Fineman - Ross, Mayo - Lewis, Yezrielev - Brokhina - Roskin, Kelen - Tüdos, Extended Kelen - Tüdos, Mao Huglin, Tidwell - Mortimer methods, as ultimate model and Curve - Fitting method as penultimate model were used for this purpose.

The results of MNDO and PM3 semi-empirical SCF MO calculations for equilibrium structures, metallotropic and protropic 1,2 -shifts of cyclopentadienyl (trimethyl) silane(l), cyclopentadienyl (trimethyl) germane(2) and cyclopentadienyl (trimethyl) stannane (3), are reported. In comparison with MNDO method, PM3 provide reliable results.