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RISS 인기검색어
- 검색키워드
- 저자 : N. Habibi (검색결과 4 건)
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N. Habibi,S. Mohammadi,H. Ghafary 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.2
The Monte Carlo simulation method can easily provide an accurate estimate of the probability of failure. However, for complex engineering problems with a low probability of failure, it may be inappropriate to provide an inefficient estimate of the probability of failure. In this study, tests investigations were performed on pressure vessel separator plates made of marine steel A36 ASTM, which exhibited corrosion on all plates, and occurred during multiple operations. The results of the tensile tests show that the areas of fracture of the specimens were observed as follows: near the gage, in the allowable area, on the line of the gage, and outside. The data obtained here provide a quantitative understanding and benchmark of the tensile behavior of corroded plates. Strain energy and maximum force varied in corrosion rate ( ) between 10 and 24 fluctuated, while for > 24 decreased significantly. A series of simulations based on the Monte Carlo method was performed to determine the effects of corrosion rate and thickness variance on the overall behavior. The results of the two methods show that the values of the mechanical properties of the corroded specimens are scattered and follow a statistically normal distribution.
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M. Giahi,N. Badalpoor,S. Habibi,H. Taghavi 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.7
A novel sol-gel method was implied to prepare CuO-doped ZnO nanoparticles. XRD and SEM techniques were used to characterize the CuO-doped ZnO sample. The photocatalytic degradation of Lidocaine HCl was investigated by two methods. The degradation was studied under different conditions such as the amount of photocatalyst, pH of the system, initial concentration, presence of electron acceptor, and presence of anions. The results showed that they strongly affected the photocatalytic degradation of Lidocaine HCl. The photodegradation efficiency of drug increased with the increase of the irradiation time. After 6 h irradiation with 400-W mercury lamp, about 93% removal of Lidocaine HCl was achieved. The degree of photodegradation obtained by Taguchi method compatible with the trial-and-error method showed reliable results.
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Giahi, M.,Badalpoor, N.,Habibi, S.,Taghavi, H. Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.7
A novel sol-gel method was implied to prepare CuO-doped ZnO nanoparticles. XRD and SEM techniques were used to characterize the CuO-doped ZnO sample. The photocatalytic degradation of Lidocaine HCl was investigated by two methods. The degradation was studied under different conditions such as the amount of photocatalyst, pH of the system, initial concentration, presence of electron acceptor, and presence of anions. The results showed that they strongly affected the photocatalytic degradation of Lidocaine HCl. The photodegradation efficiency of drug increased with the increase of the irradiation time. After 6 h irradiation with 400-W mercury lamp, about 93% removal of Lidocaine HCl was achieved. The degree of photodegradation obtained by Taguchi method compatible with the trial-and-error method showed reliable results.
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Choi, Y.J.,Kim, N.N.,Habibi, H.R.,Choi, C.Y. Academic Press 2016 General and comparative endocrinology Vol.235 No.-
Hypothalamic peptide neurohormones such as gonadotropin-releasing hormones (GnRHs) and gonadotropin-inhibitory hormone (GnIH) play pivotal roles in the control of reproduction and gonadal maturation in teleost fish. To study the effects of GnIH on fish reproduction, we investigated the influence of seabream GnRH (sbGnRH) and GnIH (both alone and in combination) on levels of reproductive genes (GnIH, GnIH-receptor [GnIH-R], melatonin receptor [MT<SUB>3</SUB>], sbGnRH, and gonadotropic hormones [GTHs]) during different stages of gonadal maturation in male, female, and immature cinnamon clownfish, Amphiprion melanopus. The results showed that the expression levels of GnIH, GnIH-R, and MT<SUB>3</SUB> genes increased after the GnIH injection, but decreased after the sbGnRH injection. In addition, these gene expression levels gradually lowered after GnIH3 and sbGnRH combination treatment, as compared to the MT<SUB>3</SUB> mRNA levels of GnIH treatment alone. However, the expression levels of the HPG (hypothalamus-pituitary-gonad) axis genes (sbGnRH and GTHs) decreased after the GnIH injection, but increased after the sbGnRH injection. In all cinnamon clownfish groups, HPG axis gene mRNA levels gradually decreased after mixed GnIH3 and sbGnRH treatment, compared to GnIH treatment alone. The present study provides novel information on the effects of GnIH and strongly supports the hypothesis that GnIH plays an important role in the negative regulation of the HPG axis in the protandrous cinnamon clownfish.
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