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Friction Stir Welding of EN 10130 Low Carbon Steel
Akbar Alimohamady,Abbas Eghlimi,Hosain Nourozi Foroshani,Mohamad Alipour Behzadi,Javad Mohammadi,Masoud Kasiri Asgarani 대한용접·접합학회 2020 대한용접·접합학회지 Vol.38 No.3
After evaluating the weldability of 1.5 ㎜ thick EN 10130 steel sheets, the influence of friction stir welding parameters, i.e., rotation speed, tool advancing speed, pin diameter, and shoulder diameter on the properties of sound joints was examined. Using metallography, scanning electron microscope, tensile test, microhardness measurement, limiting dome height test, and forming limit diagrams, it was found that having a flawless joint requires the rotation and advancing speeds to be in the range of 500-1000 rpm and 30-160 ㎜.min<SUP>-1</SUP>, respectively. A design of experiment with 29 samples based on the Box-Behnken response surface methodology method with 5 center points was then utilized to maximize the tensile strength. Accordingly, the safe range and an optimized point for welding parameters were defined.
Modification of Activated Carbon Using Nitration Followed by Reduction for Carbon Dioxide Capture
Mohammad Saleh Shafeeyan,Amirhossein Houshmand,Arash Arami-Niya,Hosain Razaghizadeh,Wan Mohd Ashri Wan Daud 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.2
Activated carbon (AC) samples were modified using nitration followed by reduction to enhance their CO2 adsorption capacities. Besides characterization of the samples, investigation of CO2 capture performance was conducted by CO2 isothermal adsorption, temperature-programmed (TP) CO2 adsorption, cyclic CO2 adsorption–desorption, and dynamic CO2 adsorption tests. Almost all modified samples showed a rise in the amount of CO2 adsorbed when the comparison is made in unit surface area. On the other hand, some of the samples displayed a capacity superior to that of the parent material when compared in mass unit, especially at elevated temperatures. Despite ~65% decrease in the surface area, TP-CO2 adsorption of the best samples exhibited increases of ~10 and 70% in CO2 capture capacity at 30 and 100 °C, respectively.
A Product Inhibition Study on Adenosine Deaminase by Spectroscopy and Calorimetry
(Ali Akbar Saboury),(Ghasem Ataie Jafari),(Ali Akbar Moosavi Movahedi),(Mohammad Reza Housaindokht),(Gholam Hosain Hakimelahi),(Adeleh Divsalar) 생화학분자생물학회 2002 BMB Reports Vol.35 No.3
Kinetic and thermodynamic studies have been made on the effect of the inosine product on the activity of adenosine deaminase in a 50 mM sodium phosphate buffer, pH 7.5, at 27oC using UV spectrophotometry and isothermal titration calorimetry (ITC). A competitive inhibition was observed for inosine as a product of the enzymatic reaction. A graphical-fitting method was used for determination of the binding constant and enthalpy of inhibitor binding by using isothermal titration microcalorimetry data. The dissociation-binding constant is equal to 140 μM by the microcalorimetry method, which agrees well with the value of 143 μM for the inhibition constant that was obtained from the spectroscopy method.
A Product Inhibition Study on Adenosine Deaminase by Spectroscopy and Calorimetry
Saboury, Ali Akbar,Divsalar, Adeleh,Jafari, Ghasem Ataie,Moosavi-Movahedi, Ali Akbar,Housaindokht, Mohammad Reza,Hakimelahi, Hosain 생화학분자생물학회 2002 Journal of biochemistry and molecular biology Vol.35 No.3
Kinetic and thermodynamic studies have been made on the effect of the inosine product on the activity of adenosine deaminase in a 50 mM sodium phosphate buffer, pH 7.5, at $27^{\circ}C$ using UV spectrophotometry and isothermal titration calorimetry (ITC). A competitive inhibition was observed for inosine as a product of the enzymatic reaction. A graphical-fitting method was used for determination of the binding constant and enthalpy of inhibitor binding by using isothermal titration microcalorimetry data. The dissociation-binding constant is equal to $140\;{\mu}M$ by the microcalorimetry method, which agrees well with the value of $143\;{\mu}M$ for the inhibition constant that was obtained from the spectroscopy method.