This study was conducted on 10 sesame genotypes in the form of Randomized Complete Blocks (RCB) design with three replications, in northern region of Ardebil Province (Moghan Plain), which is one of the sesame cultivation regions in the country, during 2007-08 cropping years. Drought stress was applied during flowering stage by sparing irrigation water for as much as 50% of water requirement by the plants. At the end of the cropping season, notes were taken and measurements were made for as many as 11 agronomical traits. Based on the results, all genotypes differed significantly for all the evaluated traits except for traits such as height of first capsule from soil surface, plant height, shoot number, stem diameter and number of capsules per plant, at 1 and 5% probability levels. Genotypes such as IS (853.08Kg), Karaj-1 (909.39Kg) and Oltan (894.80) produced the highest; whereas Indian-14 (296.41Kg) and Yellow White (365.60Kg) produced the lowest grain yield on overage among the genotypes. \n\nThe genotypic correlation was used instead of phenotypic coefficients to calculate the correlation coefficient and the causality coefficient because of its importance. \nResults showed that , IS,Karaj1 and Oltan genotypes had the highest and Indian14 and Yellow white genotypes lowest grain yields among genotypes.Root dry weight, number of root branches, main root diameter, shoot dry weight, number of seed per capsule could explain 95% of grain yield variation and root dry weight, number of root branches showed maximum direct effect on grain yield in stress condition. Branching height, shoot wet height, shoot dry weight, number of capsule per plant, 1000 seed weight and grain yield, root length, root volume, number of root branching, root wet weight and root dry weight had high heritability. \nFinally due to these results and genotypic correlation and high heritability of these traits, these traits could use for selection criteria in breeding programs in stress condition.

Deposit of Ni- Cu is in area of Gawdmorad in Anarak of Isfahan province. This deposit in form of geology is a part of central Iran. The oldest rocky part of this area consists of a series of rocky units called cat hole (Chah Gorbeh). In this research it was attempted that by using new methods of study in area such as spectrometry, involved fluids, the geochemical studies of how constitute of mineral and its increased factors were determined. From petrography studies it was determine that the oldest rocky unit of area consists of a series of rocky units called cat hole (Chah Gorbeh). In study of thin layers of Cobalt- Chloride, Epidit- Chloride, Ectonolite- Chlorite, Quartzite, Metabolite, Marble were appeared. In other words regarding to obtained results of spectrometry on37 cases, it was seen a high correlation between Ni, Co and Arsenic. The highness of destiny of more dynamic factors of LLL including Rb, Cs, Ba, Th is a dependency of Fluid Phase that show their effectiveness in final stages and after early coolness of magma. It may early destiny be control by mirror fluid, but these factors have focused on level of continent and they can as combining of levels of Magma. But in experimental cases, the reduce of amount of these factors in compare to normalized cases show the nominal effect of pollution and also is a cause to originality of these cases. One of the control factors in the area is tectonic factor that could create a low-pressure and cutting area that fluid at can create mineral material and deposits because of physical- chemical changes. Finally based on above cases it can be indicated that Gains and method of establishing deposit of Gawmorad is in agreement with deposits of case 5.

Segmentation of the strike slip faults is important from many aspects. Most of the studies which have already been carried out yet related to application of seismic methods to identify fault segments and less attention has been paid for consider the fault geometry and its application for fault segmentation. This paper is one of the first studies accomplished for one of the important strike slip faults in Center and East of Iran. In this paper, Anar fault system segmentation achieved using geometric characteristics of the fault zone, which can be a proper pattern for segmentation of long strike slip faults. In the method presented, Anar fault zone from north to south, has been divided into two main segments called Kharanagh and Bafgh segments. On the basis of geometric specifications of Anar fault zone and its diverged branches, each section of which segmented as Northern termination, main zone and southern termination ,respectively. Therefore, with regard to the segmentation, beginning and ending point of Anar fault was specified and a length of equal to 280 km considered for the fault.

Structural studies with details in Southern Sirjan areas resulted in identifying different structures including thrust fault, strike slip faults and normal faults. These structures have been analyzed from geometric &kinematic; point of view. Zagros orogeny in this area resulted in formation of various structures including folds related to the thrusts performance, dextral & sinistral, strike slip faults, normal fault related to right slip and foliation. Thrust faults within the area under study, are duplex with general trend of NW-SE and dip toward the north-east with right slip component. Strike slip fault regime acts as tear fault and it is active yet. Therefore, simultaneous presence of thrusts and strike slip faults illustrate convergent dextral transpressional tectonic regime while this transpressional regime accompanied with transtension as well; since normal faults are also seen in alluvium around depression of Sirjan which can be as a result of extension stresses due to strike slip faults performance of the district. Folds in the region often influenced by the thrusts, and from overturned type, tended toward south-east and their general trend is similar to the thrusts. Direction of max. stress 1σ, obtained from all structures and analysis of data achieved in the region, is generally NE-SW .the results achieved from geometry and kinematic analysis of west of Sirjan zone structures, indicate that structures of the area have characteristics of internal areas of Zagros orogeny and ,as a result, it can be deduced that extension and performance of the structures interrelated to Zagros orogeny.

The Late Tithonian-Early Valanginian sediments in south of Kermanshah (Halashi section 1) is composed of alternating limestone, chert, siliceous mudstone, shale and marlstone bed. The paleontological analysis led to identification of 69 taxa of radiolarians in the studied section. Radiolarian Pseudodictyomitra carpatica zone was recognized in this interval. High diversity and abundance of radiolarians in the studied section are shown that a favorable condition was prevailed during the deposition of the strata in Late Tithonian to Early Valanginian time. Nassellarians are generally more abundant than spumellarians in this interval.

Iran is located on a seismic belt and it has loose soil with liquefaction potential in the Northern and Southern areas. Liquefaction is one of the most important geotechnical phenomena leading to irreparable damages to earth dams during an earthquake. In this paper, a Non-homogeneous earth dam (Kamal Saleh) has been studied numerically by assuming that the foundation is situated on a non-compacted layer. Various models were calculated using Geostudio software. The results were showed that the vertical displacement of the dam crest and the probability of liquefaction at the heel will reduce in the absence of liquefaction layer. The same result has been observed by placing the liquefaction layer in more depth.

Horses involved in the competition can an excellent model to study the exercise induced stress response. To compare the physiological parameters and vital signs changes in the Caspian ponies exposed to the stress, 16 Caspian ponies were used in this study. The ponies were divided into control and treatment group (8 each).\nThe ponies in the treatment group were exposed to stress (a 700 meter race). The physiological parameters such as: cortisol (both in serum and saliva), insulin, glucose and lactate acid were measured before and after the race and the changes in the above mentioned factors were composed with the changes in the vital signs (before and after the stress). The increase in the cortisol (in serum and saliva) and lactate acid were in coincidence with the increase in vital signs, after the race.

The fundamental purpose behind the present research is to determine the visible influence of teaching collocations in improving Iranian EFL learners’ foreign language writing proficiency. Collocations are defined as the words that are located or found together in predictable patterns in speech and writing. The current research was executed to investigate the influence of collocation instruction and consideration on enhancing Iranian EFL learners’ writing skill. It was supposed that pre-teaching relevant vocabulary and collocations could be used to enhance the learners’ writing ability. To do so, thirty upper intermediate EFL learners were selected from among the learners in an English language institute. Their level of English proficiency was determined on the basis of a pretest at the outset of the study. Simply speaking, a test of writing ability as a pretest was administered of which the scores were used to assign the subjects into two homogeneous groups. The two groups were treated differently. The control group encountered passages without to work on without being resorted to prefabricated patterns (collocations), but the experimental group resorted to prefabricated patterns and tasks prior to writing texts respectively. The fundamental aim of this research was to gain a better understanding of the role collocations play in students’ writing. This study intended to investigate the correlation between Iranian EFL learners\' use of lexical collocations (i.e. frequency and variety) and their writing scores. Test results examined to answer the two major questions for correlation (1) between the subjects’ frequency of lexical collocations and their writing scores and (2) between the subjects’ variety of lexical collocations and their writing scores. After twenty sessions of instruction and many composition tests at regular intervals, the researchers found out that the students in experimental group were more successful than those in the control group who used traditional methods. This came into reality after the posttest It was revealed that implementation of the prefabricated patterns had a great influence upon the subjects experiencing them in comparison to the control group. Experimental subjects outperformed in the post-test, at the significant level of .01. In reality, teaching collocations could play a prominent role in improving EFL learners’ writing skill.

Pollution, we hear it every other day at school, college and read about it in newspapers. So what is it? Pollution occurs when pollutants contaminate the natural surroundings; which brings about changes that affect our normal lifestyles adversely. Pollution is the contamination of air, soil, or water by the discharge of harmful substances. Pollution prevention is the reduction or elimination of pollution at the source (source reduction) instead of at the end-of-the-pipe or stack. Pollutants are the key elements or components of pollution which are generally waste materials of different forms. Pollution disturbs our ecosystem and the balance in the environment. With modernization and development in our lives pollution has reached its peak; giving rise to global warming and human illness. Pollution occurs in different forms; air, water, soil, radioactive, noise, heat/ thermal and light. Every form of pollution has two sources of occurrence; the point and the non-point sources. The point sources are easy to identify, monitor and control, whereas the non-point sources are hard to control. The aim behind the current study is not only to introduce pollutants factors in general but also suggests some efficient solutions. By close attention to the content of the present paper one can understand that resorting to these preventive factors can help solving the pollution at least in Ahvaz city in Khuzestan, Iran.