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A Risk based Project value Model to Obtain the Optimum Value of Activities’ Costs
, M.Sc. Thesis Sharif University of Technology ; Kianfar, Farhad (Supervisor)
Abstract
In the proposed model, it is attempted to obtain the optimum cost of activities concerning their relevant risks. I n doing so, the concept of risk based project value (RPV) has been employed to measure the expected earn of each individual activity in the presence of risks. Generally, in the model, the risks are divided into critical and non-critical risks. Critical risks cause termination of activities and non-critical risks that are not as severe as critical risks and lead to monetary lost. In the next step, the risk response plans are utilized to reduce the possible adverse effects of risks. These plans, also known as action plans, are the preventive or adaptive actions that aim to reduce...
Turnip (brassica rapa) peroxidase: Purification and characterization
, Article Industrial and Engineering Chemistry Research ; Volume 48, Issue 23 , Volume 48, Issue 23 , 2009 , Pages 10614-10618 ; 08885885 (ISSN) ; Ghaemmaghami, F ; Alemzadeh, I ; Sharif University of Technology
ACS
2009
Abstract
Partial purification of plant peroxidase from turnip (Brassica rapa) was optimized. Aqueous two phase system and precipitation by ammonium sulfate (as two parallel purification methods) were used. Polyethylene glycol/ammonium sulfate/NaCl (25:7:3%, w/v) system followed by gel-filtration chromatography gave a purification factor of about 36 fold. On the other hand, ammonium sulfate precipitation (60-80% deg) followed by gel filtration gave only about 13 purification fold. Hence, the aqueous two-phase system was more efficient and useful method as a primary purification step since it was less laborious, less time-consuming, and led to more purification factor. The partially purified turnip...