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1.
P. Pornamazeh F. Afshari M. Khodarahmi 《Archives Of Phytopathology And Plant Protection》2013,46(20):2469-2475
The most reliable method to control the wheat yellow rust disease is cultivation of resistance cultivars. To provide resistance, it is necessary to be aware of the amount and the quality of pathogenesis of disease factors and resistant specifications. In this study, 82 wheat promising lines with Bolani susceptible cultivar in randomised complete block design were tested in the seedling stage. This experiment was carried out in greenhouse condition, and it was assessed by two races: 166E254A+Yr27+ and 6E150A+, which were more and less pathogenic, respectively. The attributes of resistance were measured for infection type (IT), latent period (LP), pustule size (PS) and density. Results of variance analysis relating two races between wheat genotypes for these four attributes of resistance showed that there is a difference in the probability at 1% level. The statistical analyses for these components of resistance indicated that there is negative and high solidarity between IT and LP, and also among the number and density of pustules. The correlation between IT and LP and both races were -0.90 and -0.98, respectively. Cluster analysis of lines to each race was classified as resistant, semi-resistant and susceptible. The first group of the resistant lines were 27 lines in which their ITs of 0–2, mean LP of 18?days PS of 2.8 and pustule density of 1.1 were recorded. 相似文献
2.
Mohaddeseh Habibzadeh Mashatooki Alireza Rastkar Ebrahimzadeh Amirali Abbasi 《Molecular simulation》2019,45(11):849-858
One of the most outstanding properties of TiO2 nanosheets is their lack of harmful effects on the public health and environment, which makes them an appropriate agent for medical applications such as drug delivery. Interaction of an RNA aptamer with (1 0 1), (1 0 0) and (1 1 0) surfaces of TiO2 anatase were investigated using the molecular dynamics simulation. The structural parameters including root-mean-square deviation and fluctuation, and the distance between the center-of-mass of RNA aptamer and the considered surfaces were discussed in detail. Besides, the effect of water between adsorbed aptamer and surface was investigated and analyzed by the help of dipole moment orientation, hydrogen bonds and density profile of these water molecules. Analysis of the structural parameters and interaction energies shows that the (1 1 0) surface is energetically more favorable for the adsorption of considered RNA aptamer than the (1 0 0) and (1 0 1) surfaces. Consequently, our results suggest a great potential of (1 1 0) surface of TiO2 as an efficient candidate for drug delivery applications. 相似文献
3.
Shahrokh Pashaei Rad Roshanak Torabi Ebrahim Aram Giti Abolfathi Rezvan Afshari 《Zoology in the Middle East.》2018,64(2):145-159
Wide ranging surveys of the ant fauna of Iran have enabled us to add a further 30 named species to the country list. A review of almost all the published literature and of photographs of unidentified specimens within the public domain gives a grand total of 248 species, from seven subfamilies and 37 genera. In the majority of instances, our own specimens were compared with type images available from antweb.com. This has led us to propose new or revised status for Cataglyphis turcomanica Crawley 1920, Lepisiota integrisquama (Kuznetsov-Ugamsky, 1929), Lepisiota surchanica (Kuznetsov-Ugamsky, 1929) and Messor obscurior Crawley 1920. We note that the total includes a number of what may be misidentifications and a small number of named species that seem unlikely to occur in Iran. 相似文献
4.
Khashayar Afshari Nazgol-Sadat Haddadi Arvin Haj-Mirzaian Mohammad Hosein Farzaei Mohammad Mojtaba Rohani Freshteh Akramian Rozita Naseri Antoni Sureda Negar Ghanaatian Amir Hossein Abdolghaffari 《Journal of cellular physiology》2019,234(12):21519-21546
Flavonoids comprise a group of natural polyphenols consisting of more than 5,000 subtypes mostly existing in fruits and vegetables. Flavonoids consumption could potentially attenuate the incidence and recurrence risk of colorectal cancers through their antiperoxidative, antioxidant, and anti-inflammatory effects. In addition, these compounds regulate the mitochondrial function, balance the bacterial flora and promote the apoptosis process in cancerous cells. However, some previous data failed to show the effectiveness of flavonoids in reducing the risk of colorectal cancer. In this study, we have reviewed the efficacy of different flavonoids subtypes on the risk of colon cancer and molecular mechanisms involved in this process in both clinical and animal studies. In addition, we tried to elucidate the potential synergy between these compounds and current colorectal cancer treatments. 相似文献
5.
L.?EriksenEmail author F.?Afshari M.?J.?Christiansen R.?A.?McIntosh A.?Jahoor C.?R.?Wellings 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2004,108(3):567-575
Stripe or yellow rust of wheat, caused by Puccinia striiformis f. sp. tritici, is an important disease in many wheat-growing regions of the world. A number of major genes providing resistance to stripe rust have been used in breeding, including one gene that is present in the differential tester Carstens V. The objective of this study was to locate and map a stripe rust resistance gene transferred from Carstens V to Avocet S and to use molecular tools to locate a number of genes segregating in the cross Savannah/Senat. One of the genes present in Senat was predicted to be a gene that is present in Carstens V. For this latter purpose, stripe rust response data from both seedling and field tests on a doubled haploid population consisting of 77 lines were compared to an available molecular map for the same lines using a non-parametric quantitative trait loci (QTL) analysis. Results obtained in Denmark suggested that a strong component of resistance with the specificity of Carstens V was located in chromosome arm 2AL, and this was consistent with chromosome location work undertaken in Australia. Since this gene segregated independently of Yr1, the only other stripe rust resistance gene known to be located in this chromosome arm, it was designated Yr32. Further QTLs originating from Senat were located in chromosomes 1BL, 4D, and 7DS and from Savannah on 5B, but it was not possible to characterize them as unique resistance genes in any definitive way. Yr32 was detected in several wheats, including the North American differential tester Tres. 相似文献
6.
Downstream E-box-mediated regulation of the human telomerase reverse transcriptase (hTERT) gene transcription: evidence for an endogenous mechanism of transcriptional repression 总被引:26,自引:0,他引:26 下载免费PDF全文
Horikawa I Cable PL Mazur SJ Appella E Afshari CA Barrett JC 《Molecular biology of the cell》2002,13(8):2585-2597
7.
Peddada SD Lobenhofer EK Li L Afshari CA Weinberg CR Umbach DM 《Bioinformatics (Oxford, England)》2003,19(7):834-841
We propose an algorithm for selecting and clustering genes according to their time-course or dose-response profiles using gene expression data. The proposed algorithm is based on the order-restricted inference methodology developed in statistics. We describe the methodology for time-course experiments although it is applicable to any ordered set of treatments. Candidate temporal profiles are defined in terms of inequalities among mean expression levels at the time points. The proposed algorithm selects genes when they meet a bootstrap-based criterion for statistical significance and assigns each selected gene to the best fitting candidate profile. We illustrate the methodology using data from a cDNA microarray experiment in which a breast cancer cell line was stimulated with estrogen for different time intervals. In this example, our method was able to identify several biologically interesting genes that previous analyses failed to reveal. 相似文献
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9.
Mehdi Afshari Bavil Zhi Liu Wenzhou Wu Chuanbo Li Buwen Cheng 《Plasmonics (Norwell, Mass.)》2017,12(6):1709-1715
A circular slit-groove surface plasmon polaritons (SPPs) launcher surrounding a photodetector is employed theoretically to enhance the photocurrent of atypical Si-Ge photodetectors. The slit and grooves are designed such that the SPPs are focused at the center of the absorption layer of the photodetector to result in additional electric current. Fabry–Perot resonance condition accurately calculates the period of the groove, slit-groove distance, photodetector radius, and slit-photodetector distance. The manipulation leads to constructive interference between the incident light impinging from the top and the SPPs propagating toward the photodetector. Simulation result shows that photocurrent increases by approximately 13-fold when the SPPs are introduced. 相似文献
10.
Hamadeh HK Jayadev S Gaillard ET Huang Q Stoll R Blanchard K Chou J Tucker CJ Collins J Maronpot R Bushel P Afshari CA 《Mutation research》2004,549(1-2):169-183
Molecular techniques, such as cDNA microarrays, are being used to aid in the elucidation of the mechanisms of toxicity of a variety of compounds. In this study, we evaluate the molecular effects of furan in the rat liver. Sprague-Dawley rats were exposed to 4 or 40 mg/kg furan for up to 14 days. Furan induced an initial degenerative and necrotic phenotype that was followed by inflammation and fibrosis, consistent with previous observations for this compound. RNA was harvested from each lobe of the liver at several time points to observe whether lobe-specific gene expression effects occurred. Similar gene expression changes were observed in all lobes, however the magnitude of gene expression change was more pronounced in the right lobe. Finally, to help determine the correlation between gene expression changes and liver pathology, we applied traditional microarray visualization tools to the assessment of clinical chemistry and pathology parameters. 相似文献