Permeability enhancement of Escherichia coli by single-walled carbon nanotube treatment

Mosleh, A.,Heintz, A.,Lim, K. T.,Kim, J. W.,Beitle, R. American Institute of Chemical Engineers 2017 Biotechnology progress Vol.33 No.3

<P>This research investigated the use of single-walled carbon nanotubes (SWNTs) as an additive to increase the permeability of a bacterial cell wall. Recombinant Escherichia coli BL21 (DE3) that expressed beta-lactamase were exposed to SWNTs under various levels of concentration and agitation. Activity of beta-lactamase in the culture fluid and transmission electron microscopy (TEM) were used to determine the amount of released protein, and visually examine the permeability enhancement of the cells. It was found that beta-lactamase release in the culture fluid occurred in a dose-dependent manner with treatment by SWNTs and was also dependent on agitation rate. Based on TEM, this treatment successfully caused an increase in permeability without significant damage to the cell wall. Consequently, SWNTs can be used as an enhancement agent to cause the release of intracellular proteins. (C) 2017 American Institute of Chemical Engineers</P>

PRA: A PERSPECTIVE ON STRENGTHS, CURRENT LIMITATIONS, AND POSSIBLE IMPROVEMENTS

Mosleh, Ali Korean Nuclear Society 2014 Nuclear Engineering and Technology Vol.46 No.1

Probabilistic risk assessment (PRA) has been used in various technological fields to assist regulatory agencies, managerial decision makers, and systems designers in assessing and mitigating the risks inherent in these complex arrangements. Has PRA delivered on its promise? How do we gage PRA performance? Are our expectations about value of PRA realistic? Are there disparities between what we get and what we think we are getting form PRA and its various derivatives? Do current PRAs reflect the knowledge gained from actual events? How do we address potential gaps? These are some of the questions that have been raised over the years since the inception of the field more than forty years ago. This paper offers a brief assessment of PRA as a technical discipline in theory and practice, its key strengths and weaknesses, and suggestions on ways to address real and perceived shortcomings.

A highly effective route for removal of Hg²⁺ from the waste water using 3-nitrobenzelidenemalononitrile as a modifier of Fe₃O₄@SiO₂ nanoparticles

Mosleh Mehryar,Ghasem Marandi Techno-Press 2024 Advances in nano research Vol.16 No.1

SiO₂-coated magnetic nanoparticles (Fe₃O₄@SiO₂ NPs) were modified by 3-nitrobenzelidenmalononitrile and used as green linkages for removal of Hg²⁺ form the wastewater. In this research, it has been attempted to refer to the harmful effects of mercury ions for living things and how to remove such ions using very easy and practical technique. This study shows that by optimizing the test conditions, the efficiency of the removal of harmful ions such as mercury from the water contaminated with these ions can be increased. Conditions such as temperature, speed of agitation, pH of solution were tested for removal of mercury ions. The advantages of this method over other methods listed in the article are the rapid and easy nanocry synthesis. The generated and modified Fe₃O₄@SiO₂ nanoparticles were characterized by X-ray diffraction, fourier transform infrared and scanning electron microscopy spectroscopy. The results show that the synthesized magnetic nanoparticles have the excellent performance for the removal of mercury(II) ion from the waste water.

Multiplexing VoIP Packets over Wireless Mesh Networks: A Survey

( Mosleh M. Abualhaj ),( Manjur Kolhar ),( Kefaya Qaddoum ),( Ahmad Adel Abu-shareha ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.8

Wireless mesh networks (WMNs) have been increasingly applied in private and public networks during the last decade. In a different context, voice over IP (VoIP) has emerged as a new technology for making voice calls around the world over IP networks and is replacing traditional telecommunication systems. The popularity of the two technologies motivated the deployment of VoIP over WMNs. However, VoIP over WMNs suffers from inefficient bandwidth utilization because of two reasons: i) attaching 40-byte RTP/UDP/IP header to a small VoIP payload (e.g., 10 bytes) and ii) 841 μs delay overhead of each packet in WMNs. Among several solutions, VoIP packet multiplexing is the most prominent one. This technique combines several VoIP packets in one header. In this study, we will survey all the VoIP multiplexing methods over WMNs. This study provides a clear understanding of the VoIP bandwidth utilization problem over WMNs, discusses the general approaches in which packet multiplexing methods could be performed, provides a detailed study of present multiplexing techniques, shows the aspects that hinder the VoIP multiplexing methods, discusses the factors affected by VoIP multiplexing schemes, shows the merits and demerits of different multiplexing approaches, provides guidelines for designing a new improved multiplexing technique, and provides directions for future research. This study contributes by providing guidance for designing a suitable and robust method to multiplex VoIP packets over WMNs.

Cluster Based and Energy Efficient Coverage Protocol for Wireless Sensor Networks

Mahdi Mosleh,Hagar Noori,Arash Nikdel 보안공학연구지원센터 2014 International Journal of Smart Home Vol.8 No.2

A Perspective on Strengths, Current Limitations, and Possible Improvements

Ali Mosleh 한국원자력학회 2014 Nuclear Engineering and Technology Vol.46 No.1

Probabilistic risk assessment (PRA) has been used in various technological fields to assist regulatory agencies, managerialdecision makers, and systems designers in assessing and mitigating the risks inherent in these complex arrangements. HasPRA delivered on its promise? How do we gage PRA performance? Are our expectations about value of PRA realistic? Arethere disparities between what we get and what we think we are getting form PRA and its various derivatives? Do currentPRAs reflect the knowledge gained from actual events? How do we address potential gaps? These are some of the questionsthat have been raised over the years since the inception of the field more than forty years ago. This paper offers a briefassessment of PRA as a technical discipline in theory and practice, its key strengths and weaknesses, and suggestions on waysto address real and perceived shortcomings.

Health concerns regarding the effect of the COVID-19 pandemic on male fertility

Hamidreza Mosleh,Fatemeh Moradi,Mehdi Mehdizadeh,Marziyeh Ajdary,Alaa Moeinzadeh,Ronak Shabani 대한생식의학회 2021 Clinical and Experimental Reproductive Medicine Vol.48 No.3

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a novel coronavirus found in China in 2019. The disease caused by SARS-CoV-2, coronavirus disease 2019 (COVID-19), has been found to be closely related to the cells that secrete angiotensin-converting enzyme 2 (ACE2). ACE2 is involved in the renin-angiotensin system and is widely secreted in several tissues, including the testis, which has raised concerns because organs with high expression of the ACE2 receptor are susceptible to infection. Analyses have shown that in testicular cells, such as spermatogonia, seminiferous duct cells, Sertoli cells, and Leydig cells, there is a high expression level of ACE2. Therefore, SARS-CoV-2 may damage male reproductive tissues and cause infertility. Since male infertility is an important problem, scientists are evaluating whether COVID-19 may influence male infertility through the ACE2 receptor.

Ultradense 2-to-4 decoder in quantum-dot cellular automata technology based on MV32 gate

Abbasizadeh, Akram,Mosleh, Mohammad Electronics and Telecommunications Research Instit 2020 ETRI Journal Vol.42 No.6

Quantum-dot cellular automata (QCA) is an alternative complementary metal-oxide-semiconductor (CMOS) technology that is used to implement high-speed logical circuits at the atomic or molecular scale. In this study, an optimal 2-to-4 decoder in QCA is presented. The proposed QCA decoder is designed using a new formulation based on the MV32 gate. Notably, the MV32 gate has three inputs and two outputs, which is equivalent two 3-input majority gates, and operates based on cellular interactions. A multilayer design is suggested for the proposed decoder. Subsequently, a new and efficient 3-to-8 QCA decoder architecture is presented using the proposed 2-to-4 QCA decoder. The simulation results of the QCADesigner 2.0.3 software show that the proposed decoders perform well. Comparisons show that the proposed 2-to-4 QCA decoder is superior to the previously proposed ones in terms of cell count, occupied area, and delay.

Antimicrobial Polypropylene Loaded by Silver Nano Particles

S. M. Gawish,S. Mosleh 한국섬유공학회 2020 Fibers and polymers Vol.21 No.1

Nowadays antimicrobial polypropylene fabrics are increased due to incorporation of nano metals and metal oxidesduring their production. In situ, synthesis of silver nano particles onto non-woven polypropylene (PP) fabric bearingantimicrobial properties was investigated. Silver nanoparticles were prepared by chemical method using silver nitrate,concentrations 5-40 m mole/l, sodium hydroxide and glucose as a reducing agent at 90 °C for 2 hrs. Then, padding, dryingand curing the PP treated fabric at 150 °C for 5 min was carried out. Silver nano particles dispersed onto PP was estimatedbefore and after five washings. Characterization of silver nano particles was investigated by, XRD, SEM and EDX, whichrevealed the presence of silver nanoparticles in the size range 20-40 nm. PP color for untreated and silver treated sampleswas evaluated at λmax 400 nm using colorimetric data L*, a*, b and colour strength (K/S). The antimicrobial activity of PPtreated fabric against some microorganisms such as S. aureus, E. coli and C. candida was evaluated after 24 hrs contact timeand proved to be highly effective with excellent results.

An Intelligent PSO-based Topology Control Protocol for Wireless Sensor Networks

Arash Nikdel,Mahdi Mosleh,Hagar Noori 보안공학연구지원센터 2014 International Journal of Smart Home Vol.8 No.4