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

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

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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

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Assessing the Role of Environmental Factors in the Transmission of Infectious Diseases in Communal Spaces

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Journal of Architectural Environment & Structural Engineering Research 2023年第2期6卷 33-44页

作者： Seyyed Mohammadmahdi Hosseinikia Negar Khiabanchian hadi Rezaei rad Architecture Department Tabriz Islamic Art UniversityTabriz***Iran Architecture Department ACECRBranch of HamedanHamedan***Iran Urban Planning Department Buali Sina UniversityHamedan***Iran

Communal spaces provide different facilities for users while they are the primary place for the spread of diseases,especially *** is possible through human behaviors,the way they communicate with each other and breathe in an environment by airborne pathogenic *** from various fields have gained valuable experience and achievements regarding how to prevent these diseases by means of environmental *** to the spread of the corona virus in the past years,environmental planners and designers seriously considered the need to review the design and use of spatial *** study provides a framework for decision making and design of communal spaces based on how environmental components can be effective in preventing the spread of respiratory diseases such as coronavirus and *** research method used in this article is logical reasoning combined with ANP method and focus group *** to the results of this research,indoor air quality plays the most crucial role in preventing the transmission of viruses(contagious respiratory diseases)based on expert groups.

关键词： Well building Healthy building Contagious diseases respiratory Air borne transmission

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