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Biodiversity of vespid wasps in spatial and temporal dimensions in northern Zanjan Province of Iran

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生态学杂志 2008年第5期27卷 797-802页

作者： Roohollah abbasi Maedeh Mashhadikhan mehdi abbasi Bahrain Kiabi Department of Biology Faculty of Science Shahid Beheshti University Tehran Iran Department of Biology Facuhy of Science Islamic Azad University-Damghan Branch Damghan Iran Department of Irrigation Faculty of Agriculture University of Zabol Zabol Iran

Vespidae is one of the major families of Hymenoptera with more than 115000 described species. In the present paper, Simpson and Shannon-Wiener diversity indices, Simpson, Camargo, Smith and Wilson, and modified Nee evenness indices, and richness index based on rarefaction method were adopted to study the biodiversity of vespid wasps in spatial and temporal dimensions in northern Zanjan Province of Iran. In spatial dimension, Zanjan and Gilvan showed the highest and the lowest species diversity, evenness, and richness, respectively; while in temporal dimension, 16 July-6 August showed the highest species diversity and richness, and 18 May-27 May and 23 August-2 September showed the highest and the lowest species evenness, respectively. Significant differences in species abundance between localities of study area were observed by Kruskal-Wallis nonparametric test.

关键词：生物多样性黄蜂伊朗生活性性

Influence of prior cyclic oxidation on high temperature low cycle fatigue life of bare and Pt-Al coated superalloy Rene®80

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Journal of Central South University 2022年第1期29卷 43-59页

作者： Mohammad mehdi Barjesteh Karim Zangeneh Madar Seyed mehdi abbasi Kourosh Shirvani Faculty of Materials and Manufacturing Technologies Malek Ashtar University of Technology(MUT)Babaie streetLavizan15875-1774TehranIran Department of Advanced Materials and New Energies Iranian Research organization for Science and Technology(IROST)33535-111TehranIran

The prediction of fatigue life of metallic alloys is justly accepted as one of the most important phenomena in the field of metallurgical and mechanical *** elevated temperatures,oxidation of the surfaces has an effective role in the fatigue strength and ductility of the *** the present work,the effect of prior cyclic oxidation on the high temperature low cycle fatigue(HTLCF)properties of nickel-based superalloy Rene®80 has been assessed in the uncoated state and in the Pt-aluminide(Pt-Al)coated condition at 930℃.To apply cyclic oxidation,simulation of engine thermal exposure was carried out by exposing coated and uncoated fatigue specimens in the burner rig(120 cycles at 1100℃).The cyclic oxidation procedure led to a changing in the coating microstructure from the dual-phase(ξ-PtAl_(2)+β-(Ni,Pt)Al)to single phase(β-(Ni,Pt)Al).Results of HTLCF tests showed an improvement in the HTLCF life around 11.5%in the unexposed coated specimen(pre-cyclic oxidation)as compared to unexposed bare specimen,while this rise for exposed coated specimen(post-cyclic oxidation)was only 5%.Although a mixed mode fracture morphology(ductile and brittle)was observed on the fracture surfaces of failed specimens,the wider regions of brittle fracture belonged to exposed coated/uncoated ones.

关键词： Rene®80 superalloy Pt-aluminide cyclic oxidation low cycle fatigue fractography

Advantages of employing multilevel monitoring wells for design of tunnels subjected to multi-aquifer alluvial

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Journal of Mountain Science 2021年第1期18卷 219-232页

作者： Mohsen GOLIAN Ebrahim SHARIFI TESHNIZI Hamed TAVASOLI ROSTAMI Homayoon KATIBEH Mario PARISE Masoud MAHDAD Habib SAADAT mehdi abbasi Mahshid EBAD ARDESTANI Tehran Science and Research Branch Islamic Azad UniversityTehran ***Iran Department of Geology Faculty of SciencesFerdowsi UniversityMashhad 917751436Iran Mining and Metallurgical Engineering Department Amirkabir University of Technology(Tehran Polytechnic)Tehran ***Iran Earth and Environmental Sciences Department University Aldo MoroBari 70121Italy Iran University of Science and Technology Tehran ***Iran Shiraz University Shiraz ***Iran

For tunnels being excavated through multiple knowledge of the aquifers’hydraulic head becomes essential for determining groundwater inflow into the tunnel and analyzing its stability,specifically using multilevel monitoring *** the multi-aquifer alluvial section of the Glas tunnel(Iran),since the hydraulic head calculations were based on the data obtained from single-piezometer boreholes,the excavation risk was assessed to be at high level and the tunnel seemed to be unstable,thus an incorrect conclusion was derived from the misleading *** take cost mitigation measures into account,it was necessary to calculate the hydraulic head at tunnel level *** installing nested and clustered wells the mean hydraulic head was measured to be 70 m,significantly different from the 90 m previously determined by *** the updated value,the groundwater inflow and bulkhead load,formerly calculated as 0.65 m^(3)/s and 9.5 bars,were determined to be 0.49 m^(3)/s and 7.5 bars,respectively.

关键词： Nested wells Clustered wells Hydraulic head Pumping test Mechanized tunneling Iran

Colonization of neonate mouse spermatogonial stem cells co-culture with Sertoli cells in the presence and absence soft agar

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Asian pacific Journal of Reproduction 2020年第6期9卷 298-304页

作者： Ali Talebi Shadan Navid Maryam Borhani-Haghighi Yumi Hoshino mehdi abbasi Zahra Khosravizadeh School of Medicine Shahroud University of Medical SciencesShahroudIran Tissue Engineering and Stem Cells Research Center Shahroud University of Medical SciencesShahroudIran Sexual Health and Fertility Research Center Shahroud University of Medical SciencesShahroudIran Department of Anatomy Gonabad University of Medical SciencesGonabadIran Department of Anatomy School of MedicineTehran University of Medical SciencesTehranIran Laboratory of Reproductive Endocrinology Graduate School of Biosphere ScienceHiroshima UniversityHiroshimaJapan

Objective:To investigate the effects of soft agar on in-vitro proliferation of neonate mouse spermatogonial stem cells co-cultured with Sertoli ***:Tissues of neonate NMRI male mice testes were used for harvesting spermatogonial stem cells and Sertoli *** cell harvest,flow cytometry using promyelocytic leukemia zinc-finger(PLZF)protein antibody was used to assess the purity of the *** isolated testicular cells were cultured in the absence(the control group)or presence of soft agar-coated dishes(the experimental group)supplemented with leukemia inhibitory factor and glia cell line–derived neurotrophic factor for two *** phosphatase activity was assessed in the colonies formed after two weeks of culture by alkaline phosphatase *** day 14 of culture,the expression levels of DNA-binding protein inhibitor(ID-4)and PLZF genes in the undifferentiated cells were evaluated by the detection of PLZF protein antibody using real-time PCR and immunocytochemistry *** number and diameter of the colonies of spermatogonial stem cells were assessed by ImageJ ***:In the experimental group,the number and the diameter of colonies significantly increased as compared with those in the control group(P<0.05,P<0.01,respectively).In addition,the level of expression of ID-4 and PLZF genes in the undifferentiated cells significantly increased in the experimental group as compared with the control group(P<0.01).However,the expression of tyrosine-protein kinase kit(c-kit)gene in differentiated cells decreased in the experimental group as compared with the control group,but there was no significant difference between the two ***:Spermatogonial stem cells can be efficiently proliferated by culturing the stem cells in soft agar-coated *** new protocol used in this study can be a valuable method for future studies.

关键词： Spermatogonial stem cell Soft agar Colonization Proliferation Mouse

Hot deformation behavior of Fe-29Ni-17Co alloy

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Transactions of Nonferrous Metals Society of China 2013年第11期23卷 3271-3279页

作者： Mohammad YAZDANI Seyed mehdi abbasi Ali Karimi TAHERI Amir MOMENI Department of Materials Science and Technology Sharif University of Technology Metallic Materials Research Center (MMRC-MA) Department of Materials Science and Engineering Hamedan University of Technology

Hot compression tests were carried out on a Fe-29Ni-17Co alloy in the temperature range of 900 ℃ to 1200 ℃ and at strain rates of 0.001-1 s-1. Dynamic recrystallization was found responsible for flow softening during hot compression. The flow behavior was successfully analyzed by the hyperbolic sine equation and the corresponding material constants A, n and αwere determined. The value of apparent activation energy was determined as 423 kJ/mol. The peak and steady state strains showed simple power-law dependence on the Zener-Hollomon parameter. The dynamic recrystallization kinetics was analyzed using Avrami equation and the corresponding exponent was determined to be about 2.7. This value, higher than 2 reported in the literatures, is associated with the mechanism of continuous dynamic recrystallization in the studied alloy. The flow curve up to the peak was modeled by the Cingara equation and the strain exponent, c, was determined about 0.85. The higher value of c compared with the value of 0.2 which has been reported for some stainless steels fortified the idea of extended dynamic recovery or continuous dynamic recrystallization in the studied alloy.

关键词： hot working dynamic recrystallization hot compression test flow curve modeling

Antioxidant effects of quercetin in freeze-thawing process of mouse spermatogonialstem cells

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Asian pacific Journal of Reproduction 2019年第1期8卷 7-12页

作者： Fardin Amidi Zahra Rashidi Zahra Khosravizadeh Kajal Khodamoradi Ali Talebi Shadan Navid mehdi abbasi Department of Anatomy School of MedicineTehran University of Medical SciencesTehranIran

Objective: To evaluate the antioxidant effect of quercetin on cell viability, reactive oxygen species (ROS) contents and apoptosis of cryopreserved mouse spermatogonial stem cells (mSSCs). Methods: mSSCs were isolated from neonate mice and cultivated in culture medium containing 30 μM quercetin for 48 h and then frozen for 2 weeks. After thawing, MTT assay was carried out to analyze the cell viability. Moreover, intracellular ROS levels were measured by flow cytometery and apoptosis was evaluated by detection of phosphatidylserine externalization assay and also real-time polymerase chain reaction. Results: Pre-treatment of mSSCs by 30 μM quercetin significantly decreased intracellular ROS content and apoptotic cell numbers and improved viability of mSSCs. Moreover, the gene expression of Bcl-2 and Bax significantly increased and decreased respectively after the freeze-thawing process. Conclusions: Pre-treatment of mSSCs with quercetin can improve cell viability and reduce apoptosis during freeze-thawing process. It can be a promising way to improve the quality and efficiency of cryopreservation protocols used in fertility preservation strategies.

关键词： Spermatogonial stem cell Cryopreservation Oxidative stress Quercetin

Mechanisms of fibrinolysis resistance and potential targets for thrombolysis in acute ischaemic stroke: lessons from retrieved stroke emboli

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Stroke & Vascular Neurology 2021年第4期6卷 658-667页

作者： Waleed Brinjikji Oana Madalina Mereuta Daying Dai David F Kallmes Luis Savastano Yang Liu Shahid M Nimjee Raul G Nogueira mehdi abbasi Ramanathan Kadirvel Radiology Mayo ClinicRochesterMinnesotaUSA Neurosurgery Mayo ClinicRochesterMinnesotaUSA Neurosurgery Ohio State University Medical CenterColumbusOhioUSA Neurology Emory University School of MedicineAtlantaGeorgiaUSA

There has been growing interest and insight into the histological composition of retrieved stroke *** of the main focuses of the stroke clot analysis literature has been the implications of clot composition on mechanical thrombectomy ***,the holy grail of clot analysis may not be in the field of clot-device interaction,but rather,in understanding mechanisms of fibrinolysis *** mechanisms underlying the low response to fibrinolytic therapy,even with the newer,more powerful agents,remain poorly *** factors such as embolus size,location and collateral status influence alteplase delivery and recanalisation rates;compositional analyses focused on histological and ultrastructural characteristics offer unique insights into mechanisms of alteplase *** this review,we strive to provide comprehensive review of current knowledge on clot composition and ultrastructural analyses that help explain resistance to fibrinolysis.

关键词： fibrin histological resistance

The Effects of Cupping Therapy on Skin’s Biomechanical Properties in Wistar Rats

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Chinese Medicine 2016年第1期7卷 25-30页

作者： Mohammad Mohsen Roostayi Taraneh Norouzali Farideh Dehghan Manshadi mehdi abbasi Alireza Akbarzadeh Baghban Physiotherapy Research Center School of Rrhabilitation Shahid Beheshti University of Medical Sciences Tehran Iran Department of Anatomy Tehran University of Medical Sciences Tehran Iran Department of Biostatics Shahid Beheshti University of Medical Sciences Tehran Iran

Cupping therapy has been widely used for clinical treatment of soft tissue lesions. The current study investigated the effects of cupping therapy on biomechanical properties of the skin in Wistar rats. 20 rats were divided into two groups: 10 in experimental and 10 in control group. Either the right or the left lower quadrants of the lumbar regions in the experimental group underwent 10 minutes daily cupping therapy for 12 days. The skin stiffness and ultimate tensile strength of all the rats were measured using tensiometer. The skin stiffness and ultimate tensile strength were decreased significantly in cupping side of the experimental group as compared with the non-cupping side and the control group. There were no significant differences between the non-cupping side of the experimental group and the control group. In conclusion, cupping therapy can be useful as a treatment method to reduce the skin stiffness and ultimate tensile strength.

关键词： Cupping Therapy Stiffness Ultimate Tensile Strength Wistar Rat Skin

Temporal dynamics of neonatal hypoxic-ischemic encephalopathy injuries on magnetic resonance imaging

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Neural Regeneration Research 2025年第11期20卷 3144-3150页

作者： Holly Flyger Samantha J.Holdsworth Alistair J.Gunn Laura Bennet Hamid abbasi Mātai Medical Research Institute Tairāwhiti GisborneNew Zealand Department of Anatomy&Medical Imaging Faculty of Medical and Health SciencesThe University of AucklandAucklandNew Zealand Center for Brain Research The University of AucklandAucklandNew Zealand Auckland Bioengineering Institute The University of AucklandAucklandNew Zealand

Moderate to severe perinatal hypoxic-ischemic encephalopathy occurs in~1 to 3/1000 live births in high-income countries and is associated with a significant risk of death or neurodevelopmental *** assessment is important to help identify highrisk infants,to help families,and to support appropriate interventions.A wide range of monitoring tools is available to assess changes over time,including urine and blood biomarkers,neurological examination,and *** present,magnetic resonance imaging is unique as although it is expensive and not suited to monitoring the early evolution of hypoxic-ischemic encephalopathy by a week of life it can provide direct insight into the anatomical changes in the brain after hypoxic-ischemic encephalopathy and so offers strong prognostic information on the long-term outcome after hypoxic-ischemic *** review investigated the temporal dynamics of neonatal hypoxic-ischemic encephalopathy injuries,with a particular emphasis on exploring the correlation between the prognostic implications of magnetic resonance imaging scans in the first week of life and their relationship to long-term outcome prediction,particularly for infants treated with therapeutic hypothermia.A comprehensive literature search,from 2016 to 2024,identified 20 pertinent *** review highlights that while the optimal timing of magnetic resonance imaging scans is not clear,overall,it suggests that magnetic resonance imaging within the first week of life provides strong prognostic *** challenges limit the timing consistency,particularly the need for intensive care and clinical ***,although most reports examined the prognostic value of scans taken between 4 and 10 days after birth,there is evidence from small numbers of cases that,at times,brain injury may continue to evolve for weeks after *** suggests that in the future it will be important to explore a wider range of times after hypo

关键词： magnetic resonance imaging neonatal hypoxic-ischemic encephalopathy neurodevelopmental outcomes prognostic biomarkers in neuroimaging scan timing therapeutic hypothermia