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Farhang Abbasi

Meysam Mohammad Momeni, Davood Kahforoushan, Farhang Abbasi, Saeid Ghanbarian
One of the most important solid-liquid separation processes is coagulation and flocculation that is extensively used in the primary treatment of industrial wastewater. The biopolymers, because of biodegradable properties and low cost have been used as coagulants. In this study, chitosan as a natural coagulant of choice, was modified by (3-chloro 2-hydroxypropyl)trimethylammonium chloride and was used to remove the color and turbidity of industrial wastewater. To evaluate the effect of pH, settling time, the initial turbidity of wastewater, the amount of coagulant, and the concentration of dye (Melanoidin) were chosen to study their effects on removal of wastewater color and turbidity...
April 1, 2018: Journal of Environmental Management
Ahmad Mehri, Somayeh Farhang Dehghan, Roohalah Hajizadeh, Seyed Abolfazl Zakerian, Hamzeh Mohammadi, Milad Abbasi
OBJECTIVE: On 2-lane roads, discomfort glare can cause annoyance, discomfort, inconvenience, stress, and fatigue to drivers, posing a risk of accidents. The aim of this study is to evaluate discomfort glare from the headlamps of cars widely used in Iran. METHODS: The discomfort glare of new vehicles including Pride Saba model GTX, Pride Model 131SL, Samand Soren, Peugeot 405, Megane, and Peugeot Pars was examined at distances of 5 to 100 m at a background luminance of 50 cd/m2 (late twilight/early dawn lighting) and 1 cd/m2 (nighttime) using Schmidt-Clausen and Bindels model and de Boer's subjective scale...
October 3, 2017: Traffic Injury Prevention
Mohammad Sabzi, Navid Samadi, Farhang Abbasi, Gholam Reza Mahdavinia, Masoud Babaahmadi
The conventional covalently cross-linked double network (DN) hydrogels with high stiffness often show low toughness and self-healing property due to the irreversible bond breakages in their networks. Therefore, scarcity of hydrogels that possess simultaneous features of stiffness, toughness, and autonomous self-healing properties at the same time remains a great challenge and seriously limits their biomedical applications. While, many natural materials acquire these features from their dynamic sacrificial bonds...
May 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Hakimeh Ghaleh, Farhang Abbasi, Mina Alizadeh, Ali Baradar Khoshfetrat
Freeze-drying is extensively used for fabrication of porous materials in tissue engineering and biomedical applications, due to its versatility and use of no toxic solvent. However, it has some significant drawbacks. Conventional freeze-drying technique leads to the production of heterogeneous porous structures with side orientated columnar pores. As the top and bottom surfaces of the sample are not in contact with similar environments, different rates of heat transfer in the surfaces and the temperature gradient across the sample establish the preferential direction of heat transfer...
April 2015: Materials Science & Engineering. C, Materials for Biological Applications
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