Showing 8 results for Sarikhan
Volume 9, Issue 38 (5-2021)
Abstract
Recognizing the history of culture governing the current's traditional societies is one of the important and significant issues which has been studied by domestic and foreign investigators. Archaeologists are among the researchers, accompanied by other interdisciplinary investigators, who can reconstruct the culture of our ancestors through the findings obtained from exploration, and match them with various aspects of nomads and tribes. In the present investigation, it has been tried to study the customs of Bakhtiari people. The main aim is to study the micro-cultures which have been expressed in the life of Bakhtiari people in the form of some customs of ancient Ilam. The assumptions of this investigation are based on the following questions: which customs of ancient Ilam have been inherited by Bakhtiari people? Which aspect of their life have been influenced by this expression? The method is descriptive-analytical along with field survey via a historical approach. In this investigation, 23 archaeological works from ancient Ilam civilization have been studied. The results of the research indicate that the customs of people who are now known as Bakhtiari are somewhat the lineage of the people who lived as a strong government of ancient Ilam in the region. Although the cultural and population complex of Bakhtiari has significantly changed during thousands of years, there is still an evidence implying that they are the heirs of old culture of ancient Ilam.
F. Vahdani, H. Ghafoori , S. Sarikhan,
Volume 10, Issue 2 (Spring 2019)
Abstract
Hsp70 family members are central components of the cellular network of molecular chaperones and folding catalysts. The gene encoding a protein related to Hsp70 or DnaK in the domain bacteria is called dnaK. DnaK proteins are involved in de novo protein folding, formation, and disassembly of protein complexes and degradation of misfolded proteins. The gene dnaJ which codes for Hsp40 in bacteria, modulate the activities of DnaK by acting as co-chaperone. In the present study, we cloned and expressed DnaK from Bacillus halodurans Guj1 were identified. The dnaK gene of B. halodurans was successfully expressed in E. coli BL21 (DE3) using pET-28a+ expression system. The open reading frame of the cloned gene contained 1839bp and encoded 612 amino acid residues. Calculated molecular weight and pI of the protein were 66.18kDa and 4.55 respectively. The deduced amino acid sequence of B. halodurans Guj1 showed about 60% identity with the E. coli counterpart. The 3D structure of dnaK from B. halodurans was constructed using the crystal structure of human HSP70 chaperone BiP as the template, which showed an identity of 88.8% together. Partially purified recombinant DnaK by heat treatment showed a band at approximately 70kDa on SDS-PAGE. Our findings showed that the recombinant DnaK improved the refolding efficiency of the carbonic anhydrase by 27% after 60min at 54°C. According to the results obtained, DnaK from B. halodurans can potentially be used for improving the functional properties of enzymes and proteins in various applications.
Sh. Rashidi, M.r. Abdollahi, H. Sarikhani, S.s. Moosavi,
Volume 10, Issue 2 (Spring 2019)
Abstract
The production of double haploid plants can be used as an effective method for plant breeding. In this research, in order to produce chickpea haploid plants, 1mm-long anthers of Bivanij cultivar containing the microspores at uni-nucleate stage were isolated from suitable buds (3mm in length) and exposed to different centrifuge (150g, 300g and 600g each for 3, 6 and 10 minutes) and electrical shock pretreatments (0, 100, 150 and 200V) in the 2ml microtubes containing 1.5ml of RM-IK medium. The treated anthers were then cultured in an EDM culture medium containing 10mg/l 2, 4-D and 10mg/l silver nitrate to induce callus and embryos. Results showed significant differences between different levels of centrifugation, different levels of electric shock and their interactions for the studied traits. The highest percentage of embryogenesis was observed in centrifuge pretreatments of 150g for 6 minutes, 300g for 3 minutes, 150g for 3 minutes in combination with 150V electrical shock, 300g for 6 and 10 minutes and combination of 150g centrifuge pretreatment for 3 minutes with electric shock of 200V, while the highest percentage of plant regeneration was obtained from centrifuge pretreatment of 300g for 6 minutes and also the combination of centrifuge pretreatment of 150g for 3 minutes with electric shock of 150V.
Volume 15, Issue 1 (Spring 2011)
Abstract
To prove crimes punishable by Had through confession, Islamic criminal justice has set particular qualification, some of which such as puberty and wisdom refer to the confessor while some others refer to the confession itself. Most important qualifications, which monitor confession’s quality, is its quorum. In this context, confessor’s confessions do not reach the valid quorum. In such circumstances, we are faced with incomplete confession, which its verdict is the topic of current paper. There is no doubt about the verdict of these cases with respect to instability of Had penalty, which is derived from incomplete confession. But the question is whether, in such cases, confessor’s Taazir is canceled or not? In this regard, there is no consensus among the legislators. Most of legislators have passed a sentence of Taazir on the confessor but some of them have opposed it. In our country’s jurisprudence, the legislator of the Islamic punishment has protested the incomplete confession, which is derived from not reaching the valid quorum, and has followed the dominant point of view.
In the current paper, we brought up legislators’ statements about this issue and studied their evidence with more discussion. We have also paid attention to the position of our country’s criminal law toward this issue.
Volume 22, Issue 3 (4-2020)
Abstract
Lavender leaves, widely used as flavors for foods and beverages, are a rich source of phenol components and antioxidant. Drying method is of vital importance for keeping these compounds. In this study, lavender leaves were dried by means of Atmospheric Freeze (AF), Multi-Stage Semi-Industrial Continuous (MSSIC), and Near Infrared-Vacuum (NIR-Vacuum) dryers and optimized by Response Surface Methodology (RSM) for the highest drying rate, total phenol content, antioxidant capacity, and the lowest color indicators change. Lavender leaves were also dried under natural conditions as the traditional method. Multi-stage drying caused tempering phenomenon and, consequently, drying rate increased obviously. Near infrared-vacuum dryer had suitable performance on keeping the active ingredients of lavender leaves. Optimum point to dry lavender leaves in atmospheric freeze dryer was found to be -5℃. The optimum temperature points in the multi-stage semi-industrial continuous dryer were achieved to be 60, 40, and 60℃ for the first, second, and third stages, respectively. The optimum point in near infrared-vacuum dryer was 60℃ and 20 kPa for air temperature and pressure, respectively. Based on the results, among several drying methods, near infrared-vacuum dryer was the more suitable for drying lavender leaves.
Volume 24, Issue 3 (9-2017)
Abstract
Natural events and disasters always have a devastating impact on human settlements and incur economic and social effects on societies by destroying buildings and infrastructures. One of these destructive phenomenons is landslide that could damage communities, meadows and forests, communication lines, and monuments extensively in many parts of the globe, especially in mountainous countries such as Iran. Some information is currently available about the morphological cause and effects of some apparent cases. However, the destructive effects of this phenomenon on ancient settlements have not adequately been mentioned. This study examines an ancient landslide by combining data from two seasons of archaeological excavations of Tepe Mehr Ali, located in Fars province, and related interdisciplinary studies. The results of the excavations, geological evidence and morphology of the site indicate that the southern slope of the mound (about 35 degrees) to Balangan River, represent a landslide event leading to the abandonment of this site for some time during settlement periods.
Volume 24, Issue 4 (7-2022)
Abstract
Biofilm formation and rhizosphere colonization of the plants are the main infrastructures for the biological control of the plant diseases. Bacteria accumulation in the protective layer, which results from their self-production of Exopolysaccharides (EPS), is called the biofilm. The formation of these complex structures originates from the multicellular behaviors of bacteria. Various elements can play a role in these mechanisms. In this study, we examined biofilm formation, root colonization, and salt tolerance to four concentrations of NaCl in the strains of Bacillus velezensis (Q12, US1, and UR1). The results showed that the biofilm strength plays an important role in the efficiency of tomato root colonization. Furthermore, UR1 that had defects in producing the surfactin, iturin, and fengycin using Ultrahigh-Performance Liquid Chromatography-High Resolution Electrospray Ionization Mass Spectrometry (UHPLC-HRESIMS), was incapable of tolerance to salinity, biofilm formation, competition, and rhizosphere colonization. Confocal Laser Scanning Microscopy (CLSM) studies showed that strains US1 and Q12 differed in the biofilm strength, the position of the bacteria that are located laterally, polar, or both, and root colonization. Q12 was introduced as the best strain in all these experiments. Also, based on the findings of this and previous studies, the possibility to create the subpopulations influenced by genetic diversity in Bacillus velezensis strains during biofilm formation is suggested.
Volume 30, Issue 1 (1-2023)
Abstract
This paper, reflecting on the village and archaeological site of Jamalo located on the top of the Zayanderud dam, aims to explore the circumstances human settlements would have encounter with the construction of the dam and when its reservoirs were flooded. About 30 years ago, as the images from Google Map showed, the water strip emerging from the Zayanderud dam, wherein the left riverbank hosted the village and archaeological site of Jamalo. This site had been occupied for much of the sixth and fifth millennium BC until the beginning of the Early Bronze Age. In the Middle Bronze Age, it had been dominated by the Proto-literate, historic, and Islamic periods. Archaeological evidence from surface surveys also indicated that pottery shreds were similar to those of Sialk III and Bakun A. Now, Jamalo is exposed to the waters of the dam reservoir. Therefore, the main objective of this paper is to provide an overview of what would have happened to archaeological sites with the construction of the dam, its reservoirs were flooded, and when landscapes were radically altered. Another question was: “What would have happened to archeological sites as floods made it inaccessible?” Based on the excavation at Jamalo and the comparison of images taken from the region before and after the construction of the dam, it was observed that the reservoir had destroyed the village, and the slopes of the site, especially on the eastern and northeastern parts, had been covered with a layer of deposits.
