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Alireza Ashori,Saman Menbari,Reza Bahrami 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.38 No.-
This work reports an improvement in the mechanical and thermo-mechanical properties of short carbonfiber (SCF)/polypropylene (PP) composite, resulting from coating of the SCFs with exfoliated graphenenanoplatelets (xGnPs). Firstly, the xGnPs were coated on the SCFs surface by a simple physical absorptionmethod, and then the composites were manufactured by melt blending and hot-press processing. Theamount of SCFs was kept constant at 15 wt% and the amount of xGnP was varied up to 3 wt%. Results oftensile and impact measurements indicated that, for the xGnP–SCF/PP composite, maximum tensilestrength, tensile modulus and impact strength were 43.4 MPa, 1.052 GPa, and 38.1 J/m, respectively,corresponding to 13.6%, 41.7%, and 7.3% enhancement compared to the untreated SCF/PP composite. Inaddition, the results of dynamic mechanical thermal analyses indicated enhancement in storagemodulus and damping capacity for the treated samples; however, no significant difference was observedin the glass transition temperature. The xGnP–SCF/PP interface adhesion enhancement was clearlyshown by scanning electron microscopy (SEM) images of the tensile failure surfaces. Finally, the optimalxGnP content for effectively improving the overall composite mechanical and thermo-mechanicalperformance was found to be 1 wt%.
Rashid Ramazanzadeh,Mazaher Khodabandehloo,Fariba Farhadifar,Samaneh Rouhi,Amjad Ahmadi,Shaho Menbari,Fariba Fallahi,Reza Mirnejad 질병관리본부 2016 Osong Public Health and Research Persptectives Vol.7 No.5
Objectives: Mycoplasma genitalium infections are suggested as causes of a number of pathological outcomes in pregnant women. The aim of this study was to evaluate the frequency of M. genitalium infections among pregnant women and its association with spontaneous abortion. Methods: In this case-control study we included 109 women with spontaneous abortion with a gestational age of 10-20 weeks (patients), and 109 women with normal pregnancy with a gestational age of 20-37 weeks (controls) in Sanandaj, Iran. Using specific primers and extracted DNA from endocervical swabs, a polymerase chain reaction was conducted for the detection of M. genitalium infection in both groups. Results: The frequency of M. genitalium infection in patient and control groups was one (0.91%) and three (2.75%), respectively. In both control and patient groups using Fisher test, no association between mycoplasma infection and spontaneous abortion was seen. Conclusion: M. genitalium may be positive in the genital tract of some pregnant women but was not associated with spontaneous abortion. Further powerful studies with larger sample sizes are needed for the determination of a possible role of M. genitalium in pregnancy outcomes and spontaneous abortion.