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RISS 인기검색어
- 검색키워드
- 저자 : Hadis Shahbazi (검색결과 5 건)
- 무료
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Shahbazi, Hadis,Aminian, Heshmatollah,Sahebani, Navazollah,Halterman, Dennis The Korean Society of Plant Pathology 2011 Plant Pathology Journal Vol.27 No.1
Early blight of potato, caused by Alternaria solani, is a ubiquitous disease in many countries around the world. Our previous screening of several Iranian potato cultivars found that significant variation in resistance phenotypes exists between two cultivars: resistant 'Diamond' and susceptible 'Granula'. Our previous analysis of five different pathogen isolates also identified varying degrees of aggressiveness regardless of the host cultivar. Here, a bioassay was used to study the role of liquid culture exudates produced in vitro on pathogenicity and elicitation of disease symptomology in seedlings as well as detached leaves. Responses of host genotypes to the exudates of the two A. solani isolates were significantly different. Detached leaves of the resistant cultivar 'Diamond' elicited fewer symptoms to each isolate when compared to the susceptible cultivar 'Granula'. Interestingly, the phytotoxicity effect of the culture filtrate from the more aggressive isolate A was higher than from isolate N suggesting an increased concentration or strength of the toxins produced. Our results are significant because they indicate a correlation between symptoms elicited by A. solani phytotoxins and their aggressiveness on the host.
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Hadis Shahbazi,Heshmatollah Aminian,Navazollah Sahebani2,Dennis Halterman 한국식물병리학회 2011 Plant Pathology Journal Vol.27 No.1
Early blight of potato, caused by Alternaria solani, is a ubiquitous disease in many countries around the world. Our previous screening of several Iranian potato cultivars found that significant variation in resistance phenotypes exists between two cultivars: resistant ‘Diamond’and susceptible ‘Granula’. Our previous analysis of five different pathogen isolates also identified varying degrees of aggressiveness regardless of the host cultivar. Here, a bioassay was used to study the role of liquid culture exudates produced in vitro on pathogenicity and elicitation of disease symptomology in seedlings as well as detached leaves. Responses of host genotypes to the exudates of the two A. solani isolates were significantly different. Detached leaves of the resistant cultivar ‘Diamond’ elicited fewer symptoms to each isolate when compared to the susceptible cultivar ‘Granula’. Interestingly,the phytotoxicity effect of the culture filtrate from the more aggressive isolate A was higher than from isolate N suggesting an increased concentration or strength of the toxins produced. Our results are significant because they indicate a correlation between symptoms elicited by A. solani phytotoxins and their aggressiveness on the host.
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( Mehdi Shahbazi ),( Seyed Fardin Qeysari ),( Majid Nayeri ),( Hadi Kashani ),( Sima Dastamooz ) 국제태권도학회 2017 International Symposium for Taekwondo Studies Vol.2017 No.-
Purpose: The aim of this study was to examine the relationship between body type compo nents and age of peak growth (high peak speed) in the Iranian Junior Taekwondo national team. The peak height growth rate is an important variable for determining maturation in puberty that like other maturation factors is impacted by physical condition and human body type. Methods: Subjects were 1157 expert junior Taekwondo players (boys: n = 742, 10.59 ± 2 years, 145.09 ± 13.54 cm, 37.18 ± 11.06 kg; girls: n = 381, 11.18 ± 2.36 years, 147.92 ± 13.11 cm, 40.03 ± 13.31 kg). Somatotype data were calculated using Heath-Carter instruction, and PHV was measured using the Mirwald formula. Data was analyzed using Pearson cor relation and multiple regression analyses. Results: Results of the Pearson correlation analysis in boys revealed that PHV had a posi tive correlation with ectomorph and negative correlation with endomorph and mesomorph. Total correlation between PHV and somatotype was 0.09, which explained the 0.081 of PHV variance. Results of the regression analysis showed ectomorph and endomorph were significant predictors (ectomorph more than endomorph) of PHV, but mesomorph was not a significant predictor of PHV in the girls group. Results showed that PHV and PWV had no significant relation with body composition. The regression model was: Y = 12.46-0.06a-0.04m-0.07e. Conclusions: These results indicate that endomorph and ectomorph had a significant role in predicting age of PHV, but mesomorph was not significant.
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Somaie Matin,Gholamreza Shahbazi,Shervin Tabrizian Namin,Rouhallah Moradpour,Hadi Piri-dogahe 대한기생충학ㆍ열대의학회 2017 The Korean Journal of Parasitology Vol.55 No.6
Primary maternal infection with toxoplasmosis during pregnancy is frequently associated with transplacental transmission of the parasite to the fetus. This study was conducted to test the utility of PCR assay to detect recent infections with Toxoplasma in aborted women at various gestational ages who referred to Obstetrics and Gynecology Department of Alavi Hospital in Ardabil during 2014 and 2016. Two hundred women with a history of single or repeated abortion were investigated in this study. Blood samples were tested for specific anti-Toxoplasma IgM and IgG antibodies by ELISA. According to the results, 53.5% of the women under study were positive for anti-Toxoplasma antibodies: 4.0% of them had IgM, 43.0% had IgG, and 6.5% had both IgM and IgG. Subsequently, Nested-PCR analysis was used to detect T. gondii DNA in the placenta of subjects. In 10.5% of the women, the results were positive for 529 bp element of T. gondii. Among them, 5 (23.8%) cases were IgM positive, 1 (4.8%) case was IgG positive, and 11 (52.4%) were both IgM and IgG positive. In 4 (19.0%) patients, none of the antibodies were found to be positive. In total, 16 patients had positive results in both ELISA and PCR methods, and 174 cases had negative results for new infection. The findings of this study revealed that T. gondii might be one of the significant factors leading to abortion, and that the analysis of placenta can be important in order to achieve increased detection sensitivity.
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3-dimensional numerical analysis of friction stir welding of copper and aluminum
M. E. Aalami-Aleagha,Behzad Hadi,Mohammad Ali Shahbazi 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.8
A time dependent Eulerian thermal/material flow model of friction stir welding was developed and applied to the dissimilar joining of pure copper and aluminum 1050-H16 alloy to investigate the maximum penetration of base metals. Thermal and material flow analysis was done with the assumed velocity field in the stir zone and considering a thermal source of energy obtained from the both Coulomb type of friction and the loss of shear stress in a non-Newtonian viscous behavior of metal flow. The developed model was used to estimate temperature gradient and penetration of material under three different conditions of tool offset and compared with the experimental results. The model shows that the penetration of the base metals is closely related to tool offset. In all of the cases, the metal fixed in the advancing side is copper. Nevertheless, when considering tool offset in the copper side and also when considering tool offset in the aluminum side, penetrating metals are copper and aluminum, respectively. Also, the model shows that the maximum temperature achieved in the base metals significantly depends on the tool offset.
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