Search results for: Masoud Jamshidi

Items from 1 to 20 out of 20 results

article

Laparoscopic and open surgery methods in managing surgical intussusceptions: A randomized clinical trial of postoperative complications

Masoud Jamshidi, Bahman Rahimi, Neda Gilani

Asian Journal of Endoscopic Surgery > 15 > 1 > 56 - 62

Purpose To compare postoperative complications of laparoscopic surgery (LS) with open surgery (OS) in surgical intussusception patients. Methods From March 2015 to February 2018, infants between 6 to 24 months old had the clinical and sono‐graphical signs of intussusception enrolled in this double‐blind, randomized clinical trial. We divided surgical intussusception patients into two groups. In...

article

Physical and Numerical Modeling of Piled Raft Foundation in Chamkhaleh Sand

Javad Shamsi Sosahab, Masoud Jamshidi Chenari, Reza Jamshidi Chenari, Mehran Karimpour Fard

International Journal of Civil Engineering > 2019 > 17 > 6 > 765-779

A series of laboratory large-scale model tests were conducted on piled raft founded on sand with different compaction levels. The numbers of piles are 1, 4, 5 and 9. All the piles are 40 cm in length and the slenderness ratio is 20. In these tests, the variation of load improvement ratio (LIR), load-sharing ratio (α_p) and settlement ratio (SR) are reported for different relative densities and number...

article

Influences of inorganic binder on photocatalytic oxidation (PCO) and degradation of nano/micro TiO2 containing acrylic composites

Marieh Arekhi, Masoud Jamshidi

Progress in Organic Coatings > 2018 > 115 > C > 1-8

Todays, the air impurities caused by different sources, have become one of the most important problems in mega cities. Paints and coatings have been considered as effective materials to overcome this problem. The huge exterior and interior surfaces of the buildings which exposed to air pollutants can be coated by an air purifying paint. In this research preparing a photocatalytic oxidative pseudo...

article

Study of the microstructure and flexural behavior of cementitious composites reinforced by surface modified carbon textiles

Mana Halvaei, Masoud Latifi, Masoud Jamshidi

Construction and Building Materials > 2018 > 158 > C > 243-256

In this paper, the effect of surface modification of a carbon textile on the flexural behavior of the textile reinforced fine aggregate concretes was investigated. Three different surface modifying agents (i.e. styrene butadiene latex, hydrophilic oil and epoxy resin) were applied as coating on the carbon textiles at different weight ratios (i.e. 35, 70, and 100% by weight of the textile). The four...

article

Effects of methylene diphenyl diisocyanate on the physical, mechanical, and vulcanization properties of nitrile rubber

Mahmoud Razavizadeh, Masoud Jamshidi

Journal of Applied Polymer Science > 134 > 33 > n/a - n/a

In this research, methylene diphenyl diisocyanate (MDI) was added to an acrylonitrile–butadiene rubber (NBR) compound as an additive, and its effects on the vulcanization of the rubber investigated. For this purpose, MDI was added at different concentrations (5, 10, and 20 phr) to the rubber compound. The rubber properties, including the rheometry and tensile strength, were investigated. Differential...

article

Physical and Numerical Modeling of Stone Column Behavior in Loose Sand

Reza Jamshidi Chenari, Mehran Karimpour Fard, Masoud Jamshidi Chenari, Javad Shamsi Sosahab

International Journal of Civil Engineering > 2019 > 17 > 2 > 231-244

Stone column technique has been successfully applied for the foundation improvement. A rigid box with dimensions of 1.5 × 1.5 × 1.2 m equipped with a jacking-pump system was used to loading the stone column reinforced bed. Laboratory tests are carried out on stone columns with 6.3 cm diameter and different patterns surrounded by loose sand. The parameters varied in this experimental and numerical...

article

Investigation of inter‐relationship between tensile behavior and photocatalytic activity of an acrylic‐based composite upon UVA exposure

Afshin Dianatdar, Masoud Jamshidi

Journal of Applied Polymer Science > 134 > 6 > n/a - n/a

The aim of this work is to produce a photocatalytic pseudo‐paint for benzene removal from air and find the role of TiO₂ nanoparticles, TiO₂ pigment, and CaCO₃ extender on photocatalytic performance of this paint along with their role on stress–strain behavior after ultraviolet (UV) exposure. For this purpose, TiO₂ nanoparticles were dispersed into an indoor paint resin (i.e., copolymer acrylic–styrene)...

article

Adhesion of nitrile rubber to UV-assisted surface chemical modified PET fabric, part II: Interfacial characterization of MDI grafted PET

Mahmoud Razavizadeh, Masoud Jamshidi

Applied Surface Science > 2016 > 379 > C > 114-123

Fiber to rubber adhesion is an important subject in rubber industry. It is well known that surface treatment (i.e. physical, mechanical and chemical) is an effective method to improve interfacial bonding of fibers and/or fabrics to rubbers. UV irradiation is an effective method which has been used to increase fabric-rubber interfacial interactions. In this research UV assisted chemical modification...

article

Hybridizing MWCNT with nano metal oxides and TiO₂ in epoxy composites: Influence on mechanical and thermal performances

Masoomeh Gazderazi, Masoud Jamshidi

Journal of Applied Polymer Science > 133 > 34 > n/a - n/a

In this study, the effects of multi‐walled carbon nanotubes (MWCNT), and its hybrids with iron oxide (Fe₂O₃) and copper oxide (CuO) nanoparticles on mechanical characteristics and thermal properties of epoxy binder was evaluated. Furthermore, simultaneous effects of using MWCNT with TiO₂ as pigment and CaCO₃ as filler for epoxy composites were determined. To investigate effects of nano‐ and micro‐particles...

article

Study on fiber hybridization effect of engineered cementitious composites with low- and high-modulus polymeric fibers

Hamid Reza Pakravan, Masoud Jamshidi, Masoud Latifi

Construction and Building Materials > 2016 > 112 > C > 739-746

In this study the flexural and compressive properties of hybrid engineered cementitious composite (ECC) was investigated. The hybridization with low- and high-modulus fibers was employed to increase deformability and flexural strain capacity of the ECC composite. It was found that the hybridization with non-round polypropylene (PP) fiber and low modulus polyvinyl alcohol (PVA) fiber have remarkable...

article

Influence of MWCTs and nanometal oxide/MWCTs hybrids on the thermal conduction of their acrylic-based nanocomposites

Fahimeh Khodayari, Masoud Jamshidi

Iranian Polymer Journal > 2016 > 25 > 3 > 243-250

In this study, acrylic-based nanocomposites containing different contents of multi-walled carbon nanotubes (MWCNTs) and metal oxide nanoparticles (i.e., TiO₂, CuO and Fe₂O₃) were fabricated by solvent mixing method. The thermal conductivity of these samples was evaluated. The results indicated that the thermal conductivity of all fabricated samples was significantly improved even at small loading...

article

Adhesion of nitrile rubber (NBR) to polyethylene terephthalate (PET) fabric. Part 1: PET surface modification by methylenediphenyl di-isocyanate (MDI)

Mahmoud Razavizadeh, Masoud Jamshidi

Applied Surface Science > 2016 > 360 > PA > 429-435

Fiber to rubber adhesion is an important subject in rubber composite industry. It is well known that surface physical, mechanical and chemical treatments are effective methods to improve interfacial bonding. Ultra violet (UV) light irradiation is an efficient method which is used to increase interfacial interactions. In this research UV assisted chemical modification of PET fabric was used to increase...

article

Investigation of the mechanical properties of a photocatalytic pseudo‐paint

Afshin Dianatdar, Masoud Jamshidi

Journal of Applied Polymer Science > 133 > 3 > n/a - n/a

Photocatalytic oxidative paints (e.g., a paint containing nano‐TiO₂) are used to break down volatile organic compounds to CO₂ by photooxidation reactions. In this research, a photocatalytic oxidative pseudo‐paint was made with acrylic–styrene copolymer latex, TiO₂ pigment, calcium carbonate extender, and TiO₂ nanoparticles as a photocatalyst. To investigate the effects of the pigment, extender, and...

article

Correlation between water permeability of latex-modified concrete (LMC) and water diffusion coefficient of latex film

Masoud Jamshidi, Hamid Reza Pakravan, Koosha Zojaji

Iranian Polymer Journal > 2013 > 22 > 11 > 799-809

Cement-based materials are generally known as weak materials in flexure and tension in comparison with compression. Polymers are used in cement-based materials to improve their flexural and tensile behaviors. The composite is called as polymer-modified concrete/mortar. Furthermore, polymers decrease permeability of water into cementitious matrices. Polymers are usually used as admixtures in concretes...

article

Modified polyester resins as an effective binder for polymer concretes

Masoud Jamshidi, Ali Reza Pourkhorshidi

Materials and Structures > 2012 > 45 > 4 > 521-527

Polymer concretes (PCs) are extensively used in the construction industry. Unsaturated polyester resins are amongst the most important binders in PCs. In this research a new kind of enhanced polyester resin, as the binder for PCs is presented. In order to assess the performance of PCs built with this new resin, samples of concrete comprising ordinary polyester resin and the enhanced polyester resin...

article

The role of prophylactic chest drainage in the operative management of esophageal atresia with tracheoesophageal fistula

Saeid Aslanabadi, Masoud Jamshidi, R. Shane Tubbs, Mohammadali Mohajel Shoja

Pediatric Surgery International > 2009 > 25 > 4 > 365-368

Introduction Anastomotic leakage and respiratory complications are among the most common and potentially life-threatening complications following the surgical repair of esophageal atresia. Controversies exist regarding the efficacy of prophylactic extrapleural chest tube (EPCT) drainage in patients who have undergone repair of esophageal atresia. Materials and methods In this prospective study,...

article

Lateralization of the respiratory control following unilateral cerebral ischemia-reperfusion injury

Mohammadali M. Shoja, R. Shane Tubbs, Masoud Jamshidi, Ghaffar Shokouhi, more

Respiratory Physiology & Neurobiology > 2008 > 160 > 2 > 204-207

Cerebral control of respiration has been extensively studied but at present, no evidence of cerebral laterality or dominance for respiration exists. We examined the ventilatory changes following temporary (20min) occlusion of the right or left common carotid artery in rabbits. The corresponding groups of sham-operated rabbits were used as controls. The partial pressure of end-tidal carbon dioxide...

article

Transanal one-stage endorectal pull-through for Hirschsprung’s disease: a comparison with the staged procedures

Saeid Aslanabadi, Afshin Ghalehgolab-Behbahan, Sina Zarrintan, Masoud Jamshidi, more

Pediatric Surgery International > 2008 > 24 > 8 > 925-929

Transanal one-stage endorectal pull-through (TOSEPT) has been presented as the most recent progression in treatment of Hirschsprung’s disease (HD), which may be able to replace various previous techniques. This prospective study was designed to compare the efficacy and probable complications of the commonly used open surgery with those of TOSEPT technique in management of HD. Forty-two children (35...

article

Does the neuroprotective agent Erythropoietin amplify diffuse axonal injury in its early stages?

R. Shane Tubbs, Mohammadali M. Shoja, Masoud Jamshidi, Ghaffar Shokouhi

Medical Hypotheses > 2007 > 69 > 6 > 1385-1386

article

Hydrodynamic and mass transfer characterization of a down flow jet loop bioreactor

Amir Masoud Jamshidi, Morteza Sohrabi, Farzaneh Vahabzadeh, Babak Bonakdarpour

Biochemical Engineering Journal > 2001 > 8 > 3 > 241-250

The effects of certain pertinent parameters such as gas and liquid flow rates and nozzle position on the behavior of a down flow jet loop bioreactor (DJB) have been studied. The mean residence times of gas and liquid phases and the gas hold-up within the bioreactor have been measured. A correlation has been presented for the gas hold-up. In addition, the overall volumetric mass transfer coefficient,...

Filter options

Publication date

Last 3 years (1)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

INFONA - science communication portal

Search results for: Masoud Jamshidi

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options