Two new species of Chrysis Linnaeus (Hymenoptera, Chrysididae) from Iran

Afrouz Farhad,Paolo Rosa,Ali Asghar Talebi,Yaghoub Fathipour,Hamidreza Hajiqanbar 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.4

The Iranian species in the Chrysis pulchella and C. varidens species groups are investigated. Six species are recognized, two of which are described for the first time: Chrysis gamberoonensis Farhad, Rosa and Talebi sp. nov. and Chrysis brunneamarginata Farhad, Rosa and Talebi sp. nov.. Chrysis gamberoonensis Farhad, Rosa and Talebi sp. nov. belongs to the C. pulchella group and is recognizable within this species group by its unique blue body coloration, scattered mesosoma punctures, polished pit row with elongated pits, and a small median tooth on the lateral edge of metasomal tergum 3. Chrysis brunneamarginata Farhad, Rosa and Talebi sp. nov. belongs to the C. varidens group and is recognizable by the usually colorless apical rim of metasomal tergum 3, and the unique shape of the anterior corners of the scutellum which are enlarged, thickened and directed backward covering the axillary trough. Dichotomous keys and distributional data for Iranian species included in these species groups are provided. Chrysis schwarzi Linsenmaier, 1968 is raised to species rank. The number of Iranian Chrysis species and subspecies is raised to 122.

Genetic Diversity and Population Structure of Four Iranian Alfalfa Populations Revealed by Sequence-Related Amplified Polymorphism (SRAP) Markers

Talebi, Majid,Hajiahmadi, Zahra,Rahimmalek, Mehdi 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.3

In the present study, genetic diversity of 48 individual plants from four Iranian cultivated populations of alfalfa (Medicago sativa L.) was evaluated using sequence-related amplified polymorphism (SRAP) markers. Fourteen SRAP primer combinations produced 193 fragments of which 95 were polymorphic. The number of polymorphic fragments detected per primer combination ranged from 3 to 10 bands with an average of 6.78 bands. Average polymorphic information content (PIC) was 0.343 for all primer combinations. Although the AMOVA (analysis of molecular variance) results showed a significant difference in the genetic diversity among the populations (P < 0.0001), the genetic variation mainly caused by the variation of intra population accounted for 93.17% of the total genetic variation. Unweighted pair-group method arithmetic average (UPGMA) analysis of the marker data clearly separated the populations of subtropical (Yazdi) and semi-cold (Hamadani and Nikshahri) as well as Kodi, an improved population. It can be concluded that SRAP markers are useful for studying diversity and relationships among and within alfalfa populations.

NEW CONCEPTS OF PRODUCT INTERVAL-VALUED FUZZY GRAPH

TALEBI, A.A.,RASHMANLOU, HOSSEIN,AMERI, REZA The Korean Society for Computational and Applied M 2016 Journal of applied mathematics & informatics Vol.34 No.3

In this paper, we introduce product interval-valued fuzzy graphs and prove several results which are analogous to interval-valued fuzzy graphs. We conclude by giving properties for a product interval-valued fuzzy graph.

Characterizations of Several Modules Relative to the Class of B(M, X)

Talebi, Yahya,Hosseinpour, Mehrab Department of Mathematics 2013 Kyungpook mathematical journal Vol.53 No.1

Let M and X be right R-modules. We introduce several modules relative to the class of B(M, X) and we investigate relation among these modules. In this note, we show if M is X-${\oplus}$-supplemented such that $M=M_1{\oplus}M_2$ implies $M_1$ and $M_2$ are relatively B-projective, then M is an X-H-supplemented module.

NEW CONCEPTS OF REGULAR INTERVAL-VALUED FUZZY GRAPHS

TALEBI, A.A.,RASHMANLOU, HOSSEIN,DAVVAZ, BIJAN The Korean Society for Computational and Applied M 2017 Journal of applied mathematics & informatics Vol.35 No.1

Recently, interval-valued fuzzy graph is a growing research topic as it is the generalization of fuzzy graphs. The interval-valued fuzzy graphs are more flexible and compatible than fuzzy graphs due to the fact that they allowed the degree of membership of a vertex to an edge to be represented by interval values in [0.1] rather than the crisp values between 0 and 1. In this paper, we introduce the concepts of regular and totally regular interval-valued fuzzy graphs and discusses some properties of the ${\mu}$-complement of interval-valued fuzzy graph. Self ${\mu}$-complementary interval-valued fuzzy graphs and self-weak ${\mu}$-complementary interval-valued fuzzy graphs are defined and a necessary condition for an interval valued fuzzy graph to be self ${\mu}$-complementary is discussed. We define busy vertices and free vertices in interval valued fuzzy graph and study their image under an isomorphism.

Entropy and exergy analysis and optimization of the VVER nuclear power plant with a capacity of 1000 MW using the firefly optimization algorithm

Talebi, Saeed,Norouzi, Nima Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.12

A light water nuclear Reactor has been exergy analyzed, and the rate of irreversible exergy loss and exergy destruction is calculated for each of its components. The ratio of these losses compared to the total input exergy loss is calculated, which shows that most irreversible losses occur in the reactors, turbines, steam generators, respectively, as well as in the downstream operations. The main aim of this paper is to optimize the power plant using an innovative firefly algorithm and then to propose a novel strategy to improve the overall performance of the plant. As shown in the results, the exergy destruction rate of the plant decreased by 1.18% using the firefly method, and the exergy efficiency of the plant reached 29.3% comparing to the operational amount of 28.99%. Also, the results of the firefly optimization process compared to the Genetic algorithm and gravitational search algorithm to study the accuracy of the model for exergy analysis fitness problems in the power plants and the results of this comparison has shown that the results are nearly similar in the mentioned methods. However, the firefly is faster and more accurate in limited iterations.

A numerical analysis on the performance of buckling restrained braces at fire-study of the gap filler effect

Elnaz Talebi,Mahmood Md Tahir,Farshad Zahmatkesh,Ahmad B.H. Kueh 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.19 No.3

Buckling Restrained Braces (BRB) have been widely used in the construction industry as they utilize the most desirable properties of both constituent materials, i.e., steel and concrete. They present excellent structural qualities such as high load bearing capacity, ductility, energy-absorption capability and good structural fire behaviour. The effects of size and type of filler material in the existed gap at the steel core-concrete interface as well as the element's cross sectional shape, on BRB's fire resistance capacity was investigated in this paper. A nonlinear sequentially-coupled thermal-stress three-dimensional model was presented and validated by experimental results. Variation of the samples was described by three groups containing, the steel cores with the same cross section areas and equal yield strength but different materials (metal and concrete) and sizes for the gap. Responses in terms of temperature distribution, critical temperature, heating elapsed time and contraction level of BRB element were examined. The study showed that the superior fire performance of BRB was obtained by altering the filler material in the gap from metal to concrete as well as by increasing the size of the gap. Also, cylindrical BRB performed better under fire conditions compared to the rectangular cross section.

Frequency of Antibiotic Resistance in Helicobacter pylori Strains Isolated from the Northern Population of Iran

Amin Talebi Bezmin Abadi,D. Scott Merrell,Tarang Taghvaei,Ashraf Mohabbati Mobarez,Beth M. Carpenter 한국미생물학회 2011 The journal of microbiology Vol.49 No.6

The purpose of this study was to evaluate the primary resistance rates of recent clinical Helicobacter pylori isolates to the most commonly used antibiotics in Iran. Two hundreds and ten patients presenting with gastric maladies between January and July of 2009 were enrolled in this study. Endoscopy was performed, and biopsy specimens were collected from each patient for subsequent bacterial culture of H. pylori. Single colony isolates from each patient were then used for antimicrobial susceptibility testing. The disk diffusion method was used to determine susceptibility patterns. One hundred and ninety-seven of the patients were H. pylori positive (93.8%). The rates of resistance to tetracycline, amoxicillin, ciprofloxacin, metronidazole, clarithromycin, and furizoladone were 37.1%, 23.9%, 34.5%, 65.5%, 45.2%, and 61.4%, respectively. A significant association between amoxicillin resistance and disease state (P<0.05) was identified. Furthermore, some double, triple, quadruple, and quintuple combinations of antibiotic resistance were found to be associated with disease state. This study evaluated the prevalence of H. pylori resistance to the most commonly prescribed antibiotics used in Iran and showed that resistance rates were generally higher than previously reported. This data adds to the growing body of evidence that suggests there is increasing antibiotic resistance among H. pylori isolates, which likely is responsible for the decreasing efficacy of anti-H. pylori therapy at the local and global level. Hence, there is a need for continued monitoring of resistance patterns, especially at the local level, and for incorporation of that information into treatment regimens for H. pylori infections.

Genetic Diversity and Population Structure of Four Iranian Alfalfa Populations Revealed by Sequence-Related Amplified Polymorphism (SRAP) Markers

Majid Talebi,Zahra Hajiahmadi,Mehdi Rahimmalek 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.3

In the present study, genetic diversity of 48 individual plants from four Iranian cultivated populations of alfalfa (Medicago sativa L.) was evaluated using sequence-related amplified polymorphism (SRAP) markers. Fourteen SRAP primer combinations produced 193 fragments of which 95 were polymorphic. The number of polymorphic fragments detected per primer combination ranged from 3 to 10 bands with an average of 6.78 bands. Average polymorphic information content (PIC) was 0.343 for all primer combinations. Although the AMOVA (analysis of molecular variance) results showed a significant difference in the genetic diversity among the populations (P < 0.0001), the genetic variation mainly caused by the variation of intra population accounted for 93.17% of the total genetic variation. Unweighted pair-group method arithmetic average (UPGMA) analysis of the marker data clearly separated the populations of subtropical (Yazdi) and semi-cold (Hamadani and Nikshahri) as well as Kodi, an improved population. It can be concluded that SRAP markers are useful for studying diversity and relationships among and within alfalfa populations.

Evaluation of Saccule Function in Patients with Vitamin D Deficiency

Hossein Talebi,Marziyeh Moallemi,Mitra Ghorbani 대한청각학회 2019 Journal of Audiology & Otology Vol.23 No.1

Background and Objectives: Considering important role of vitamin D in many physiologicalprocesses including vestibular system in the ear, aim of present study is to evaluate sacculefunction via cervical vestibular evoked myogenic potential (cVEMP), in patients with vitaminD deficiency. Subjects and Methods: After routine audiological tests, cVEMP were recordedin 15 patients with vitamin D deficiency and 16 normal subjects. The short tone burst (95 dBnHL, 500 Hz) was presented to ears. cVEMP was recorded with surface electromyographyover the contracted ipsilateral sternocleidomastoid muscle. Results: Mean of p13, n13, interpeaklatencies and amplitude ratios were measured in both groups. Statistical analysis didnot show differences between two groups. Conclusions: Maybe serum 25-hydroxyvitaminD concentration was not low enough to have effect on saccule in the patients in presentstudy or saccule have had low susceptibility to effects of vitamin D deficiency. For betterjudgment about effect of vitamin D deficiency on saccular function planning studies with highsample size is recommended.