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Articles by Ayman Suliman Mazahreh
Total Records ( 2 ) for Ayman Suliman Mazahreh
  Ayman Suliman Mazahreh , Jihad M. Quasem , Ali Faleh Al-Shawabkeh and Ibrahim Abdullah Afaneh

Problem statement: Boiled white brined (Nabulsi cheese) is the mostly consumed in Jordan; this cheese should show meltability and high stretchability in order to fit in the production of high quality Kunafa and other popular local sweets and pastries.The most outstanding characteristic of Nabulsi cheese is the long keeping ability (more than one year) without cooling, since it is preserved in concentrated brine (up to 25%).
This work was based on the hypothesis that it would be possible to imply meltability and stretchability to the cheese by adjusting pH to the original brine that may specifically act on cross linking bonds of casein. A new apparatus for measuring the actual stretchability was designed and constructed; measurements on different cheeses proved its validity and reliability to measurement stretchability up to 80cm. Detailed treatments revealed the success of the proposed assumption in inducing meltability and stretchability to cheese processed and preserved according to the traditional methods.
The following results were obtained: It is possible to imply a low but acceptable level of stretchability and meltability through adjustment of the pH in the range of 5.4-5.8 by adding calculated amount of citric acid considering the buffering capacity of the cheese and storing it for few weeks to reach equilibrium.
Conclusion: Conformational experiments proved the applicability of the new method on commercial Nabulsi cheese samples. Sensory evaluation revealed the superiority of pH adjusting treatment specifically at pH 5.4 and 5.8 as well as commercial Mashmouleh cheese that has high meltability and stretchability when used in Kunafa making.

  Jihad M. Quasem , Ayman Suliman Mazahreh and Khaled Abu-Alruz
  Problem statement: Decorticated sesame seed can supply us with nutritious, functional and healthy meals with relatively low cost. These properties make sesame a valuable source of protein and other nutrients to be utilized in imitated dairy products, which could be used for infant and adults with lactose intolerance as well as for vegetarian or others who like to eat dairy products free from cholesterol. Additionally, the production of sesame-based dairy products can overcome the problems that limit consumption of soy-based dairy products such as antinutritional factors, flavor and flatulence. The major challenges in developing dairy analogs from plant sources are: unacceptable flavor, low solids yield and low dispersion stability. Approach: The following factors were investigated to increase/optimize the sesame milk yield, dispersion stability and sensory acceptance: pretreatment of sesame seed with simple physical treatments (soaking in water, boiling, pressure cooking, steaming and combination treatments) and heat treatment of sesame milk (pasteurization or sterilization). Results: Heat treatments during all steps of processing proved to be the most important factor in determining the yield and quality of sesame milk. The best treatment was pasteurized sesame milk (75°C for 5 min) with 12% initial sesame seed concentration (previously dried at 170°C for 5 sec) and formulated with the addition of 2% sucrose. Conclusion: The developed procedure for sesame milk production resulted in high yield, excellent dispersion stability and good sensory acceptability.
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