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Using an Inhibitor to Prevent Plasticizer Migration from Polyurethane Matrix to EPDM Based Substrate

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Chinese Journal of Polymer Science 2019年第7期37卷 681-686页

作者： hadi rezaei-Vahidian Tohid Farajpour Mahdi Abdollahi Space Transportation Research Institute Iranian Space Research CenterTehranIran Polymer Reaction Engineering Department Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran

The loss of adhesion between the propellant and insulator is one of the most important problems in solid propellant motors due to migration of plasticizer to interface of propellant and insulator. In this work, the polyurethane (PU) binder containing DOP plasticizer was used as a polymeric matrix and β-cyclodextrin (β-CD) was applied as inhibitor agent to prevent plasticizer migration from the PU matrix into the ethylene propylene diene monomer (EPDM) substrate. To increase the compatibility of β-CD and PU matrix, a derivative of β-CD has been synthesized using toluene diisocyanate (β-CD-TDI). The synthesized derivative was characterized by MALDI-MS and FTIR-ATR analyses. FTIR-ATR results confirmed the formation of bonding between β-CD and the polymeric network while the MALDIMS results showed that the synthesized derivative contained two β-CD and 7 TDI molecules bonded to β-CD. Investigation of the mechanical properties of PU modified by β-CD-TDI showed a decrease in tensile strength and an increase in elongation at break with increasing β-CD-TDI content. DMTA results showed a decrement in crosslinking density by increasing the β-CD-TDI content. Also, to investigate plasticizer migration, extraction of the DOP plasticizer from samples was performed using dichloromethane solvent and its concentration was measured by gas chromatography. The results of migration evaluation after four months showed that using β-CD as an inhibitor agent in the PU binder could prevent the migration of plasticizer to EPDM substrate.

关键词： Plasticizer migration β-Cyclodextrin Polyurethane

Sustainability assessment of potato fields using the DEXi decision support system in Hamadan Province, Iran

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Journal of Integrative Agriculture 2018年第11期17卷 2583-2595页

作者： Mohammed Ebrahim rezaei Morteza Barmaki hadi Veisi Department of Agronomy and Plant Breeding University of Mohaghegh Ardabili Environmental Sciences Research Institute Shahid Beheshti University

Potato is a staple food crop and the most important agricultural commodity, which critically affects food security and economic stability in Hamadan Province, Iran. Ex-ante sustainability appraisal of new cropping systems and their comparisons with conventional systems can increase the efficiencies of innovations and changes within the production process. This study aimed to explore the sustainability levels of potato cropping systems in Hamadan Province, Iran. To this end, DEXi methodology was developed for the sustainability assessment of the cropping systems. For assessing the three dimensions of environmental, economic, and social sustainability in the four systems of traditional potato system （TPS）, Quasi-industrial potato system （QIPS）, industrial potato system （IPS）, and government-promoted potato system （GPPS）, five groups of features were utilized：（1） irrigation method; （2） seed placement; （3） farm machinery use; （4） agrochemical use; and （5） rotation. The impact a^sessments of the cropping systems were based on two, three, and two groups of ecological, social, and economic indicators, respectively. Employment, supply chain, protection, operational difficulty, productivity, profitability, input use, and biodiversity resulted in 21 basic indicators and 13 aggregated indicators, by which the cropping systems were described. The results revealed that GPPS with distinctive economic and social profiles could have a better overall sustainability despite the fact that some indicators like biodiversity could be negatively affected. Finally, three strategies were recommended for the sustainability of GPPS as follows： biodiversity enhancement, input substitution, and integrated water management.

关键词： agricultural sustainability multi-criteria potato

Cobalt（Ⅲ） Complex [CoL3] Derived from an Asymmetric Bidentate Schiff Base Ligand L （L=（5-Bromo-2- hydroxybenzyl-2-furylmethyl）-imine）： Synthesis, Characterization and Crystal Structure

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Chinese Journal of Chemistry 2011年第8期29卷 1613-1616页

作者： Khalaji, Aliakbar D. Maghsodlou rad, Sepideh Grivani, Gholamhossein rezaei, Morteza Gotoh, Kazuma Ishida, Hiroyuki Department of Chemistry Faculty of Science Golestan University Gorgan Iran School of Chemistry Damghan University Damghan P. O. Box 36715-364 Iran Department of Chemistry Faculty of Science Okayama University Okayama 700-8530 Japan

Cobalt（Ⅲ） complex [CoL3], where L=（5-bromo-2-hydroxybenzyl-2-furylmethyl）imine, has been synthesized by reacting cobalt（Ⅱ） nitrate with L. The complex has been characterized by elemental analysis and FT-IR spectroscopy. The crystal structure of [CoL3]_was determined by X-ray crystallography from single crystal data. It crys- tallizes in the triclinic space group P1 with unit cell parameters： a=9.6644（10）A, b--11.5657（11）A, c= 16.5809（17）A, a= 102.833（4）°,β= 102.999（3）°, γ= 105.480（3）°, V= 1659.9（3）A3 and Z=2. Thermal decomposition of [COL3] was studied by thermogravimetry in order to evaluate its thermal stability and thermal decomposition pathways.

关键词： Cobat(Ⅲ) spectroscopy crystal structure thermogravimetry

Nanofibrous nerve conduits for repair of 30-mm-long sciatic nerve defects

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Neural Regeneration Research 2013年第24期8卷 2266-2274页

作者： Esmaeil Biazar Saeed Heidari Keshel Majid Pouya hadi rad Melody Omrani Nava Mohammad Azarbakhsh Shirin Hooshmand Department of Biomaterial Engineering Tonekabon Branch Islamic Azad University Student Research Committee Proteomics Research Center Faculty of Paramedical Sciences Shahid Beheshti University of Medical Sciences Department of Tissue Engineering School of Advanced Technologies in Medicine Tehran University of Medical Sciences Department of Medical Sciences Tonekabon Branch Islamic Azad University Faculty of Medical Sciences Babol University of Medical Sciences

It has been confirmed that nanofibrous poly（3-hydroxybutyrate-co-3-hydroxyvalerate） nerve conduit can promote peripheral nerve regeneration in rats. However, its efficiency in repair of over 30-mm-long sciatic nerve defects needs to be assessed. In this study, we used a nanofibrous poly（3-hydroxybutyrate-co-3-hydroxyvalerate） nerve conduit to bridge a 30-mm-long gap in the rat sciatic nerve. At 4 months after nerve conduit implantation, regenerated nerves were macroscopi- cally observed and histologically assessed. In the nanofibrous graft, the rat sciatic nerve trunk had been reconstructed by restoration of nerve continuity and formation of myelinated nerve fiber. There were Schwann cells and glial cells in the regenerated nerves. Masson＇s trichrome staining showed that there were no pathological changes in the size and structure of gastrocnemius muscle cells on the operated side of rats. These findings suggest that nanofibrous poly（3-hydroxybutyrate-co-3- hydroxyvalerate） nerve conduit is suitable for repair of long-segment sciatic nerve defects.

关键词： neural regeneration peripheral nerve injury sciatic nerve artificial conduit nanofiber poly(3-hydr-oxybutyrate-co-3-hydroxyvalerate) macroscopic observation histology grants-supported paper neuroregeneration

Lifetime Optimization via Network Sectoring in Cooperative Wireless Sensor Networks

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Wireless Sensor Network 2010年第12期2卷 905-909页

作者： hadi Jamali rad Bahman Abolhassani Mohammad Abdizadeh 不详

Employing cooperative communication in multihop wireless sensor networks provides the network with significant energy efficiency. However, the lifetime of such a network is directly dependant upon the lifetime of each of its individual sections (or clusters). Ignoring the fact that those sections close to sink have to forward more data (their own data plus the data received from the previous sections) and hence die sooner with considering equal section sizes, leads to a sub-optimal lifetime. In this paper, we optimize the section sizes of a multihop cooperative WSN so that it maximizes the network lifetime. Simulation results demonstrate a significant lifetime enhancement for the proposed optimal sectoring.

关键词： Wireless Sensor Network (WSN) Cooperative Communications Virtual Multi-Input-Multi-Output (V-MIMO) Energy Efficiency

Intussusception associated with a linear foreign body in a dog: A case report

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Journal of Coastal Life Medicine 2017年第12期5卷 559-561页

作者： hadi Hassibi Mahdieh rezaei Sajad Seyyedin Dariush Vosugh Department of Clinical Science Faculty of Veterinary MedicineShahid Bahonar University of KermanKermanIran

Intussusception due to linear foreign body obstruction was described in this clinical report in a dog presented with a history of lethargy, anorexia, vomiting and abdominal pain. Diagnosis of intussusception was confirmed by contrast radiography. Manual reduction of jejuno-jejunal intussusception and removal of thread were done in laparotomy. No other complications were identified during the 4-month postoperative period in this case.

关键词： Intussusception Linear foreign body Dog

伊朗2009-2016年间传统医学使用及家庭费用支出情况概述

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亚太传统医药 2021年第1期17卷 1-3页

作者： Enayatollah Homaie rad Mohammad Hajizadeh Satar rezaei 圭兰医科大学伊朗拉什特

目的:分析2009-2016年间伊朗传统医学使用及家庭费用支出情况的影响因素。方法:基于伊朗家庭收入和支出调查(HIES),采用伪面板数据的Tobit模型分析家庭收入、家庭财富等级、家庭规模、男性数量、识字成员数量、家庭成员平均年龄对传统... 详细信息

目的:分析2009-2016年间伊朗传统医学使用及家庭费用支出情况的影响因素。方法:基于伊朗家庭收入和支出调查(HIES),采用伪面板数据的Tobit模型分析家庭收入、家庭财富等级、家庭规模、男性数量、识字成员数量、家庭成员平均年龄对传统医学使用及经费支出的影响。结果:研究结果表明,越富裕的家庭使用传统医学的频率越高;受教育程度越高的家庭成员越倾向于使用传统医学。家庭收入与传统医学的使用及经费支出情况呈正相关。结论:调查结果显示,伊朗对传统医学的使用率低于亚洲地区平均水平,但经济水平越高的家庭对传统草药的消耗量越大。

关键词：传统医学经费支出伊朗

An Empirical Study on Microbial Load and Acidity in Raw Milk Produced in Malayer and Nahavand Cities, Iran 2012

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Health 2014年第16期6卷 2184-2189页

作者： Mohammad rezaei Ali Asghar Behzadi Ali Akbar Malekirad Ahmad Fattahi Mohamad hadi Farahzadi Mohammad Sarmadi Hasan Mohammadi Aghamirlou Reza Ali Fallahzadeh Department of Food Safety and Hygiene School of Public Health Tehran University of Medical Sciences Tehran Iran Department of Food Safety and Hygiene School of Health Yazd University of Medical Sciences Yazd Iran Department of Biology Payame Noor University Tehran Iran Department of Occupational Health Engineering School of Health Shahid Sadoughi University of Medical Sci-ences Yazd Iran Department of Neuroscience School of Advanced Technologies in Medicine Tehran University of Medical Sciences Tehran Iran Department of Environmental Health and Engineering School of Public Health Tehran University of Medical Sciences Tehran Iran Department of Environmental Health Engineering School of Health Shahid Sadoughi University of Medical Sciences Yazd Iran

Milk is very susceptible for growth and development of many microorganisms because it is rich in nutrients and has suitable condition. Thus, it is very vital to respect sanitary conditions at all stages of production and transport of raw milk. The objective of the present investigation was to determine the total bacterial, and acidity in raw milk from milk collection centers in Malayer and Nahavand cities. 52 milk samples were collected from 13 centers in summer 2012 and were analyzed according to standard methods. None of the raw milk samples under investigation, had superior or grade 1 quality. Only 7.7% of the samples were classified as raw milk with grade 2 quality and 92.3% were non-standard. The mean of microbial total count in base was 3.8 × 107 CFU/ml and average acidity in the samples was 0.163. The city of Tochqhaz and Aliabade-Damagh has the lowest and the highest microbial total count. In general the result of this study showed unsatisfactory conditions of milk in the milk collection centers of the Malayer and Nahavand cities.

关键词： Food Safety Milk Collection Centers Acidity Microbial Total Counts