yasser othman - Academia.edu (original) (raw)

Papers by yasser othman

Research paper thumbnail of Effect of Gamma Irradiation on Peanut (Arachis Hypogaea.L)

Arab Gulf Journal of Scientific Research

This work report the effect of irradiation with gamma rays (1, 2 and 3 kGy) on the chemical compo... more This work report the effect of irradiation with gamma rays (1, 2 and 3 kGy) on the chemical composition, microbial loads, chemical characteristics and sensorial properties of the peanut seeds. The data obtained from the experiments showed that gamma irradiation process has no effect on the proximate composition (water content, proteins, sugars, lipids, and ash), and chemical attributes (free fatty acids, pH value and based nitrogen value (BVN)) of peanut seeds. Irradiation was found to cause significant reduction in microbial load and no fungal colonies were detected in irradiated samples with 2 and 3 kGy. Bacterial and fungal load of irradiated peanut seeds and there comparison with control samples suggest that gamma irradiation treatment at low doses is an effective post-harvest treatment and quarantine control for fungal load. However, non-irradiated and irradiated peanut seeds did not show significant differences in the sensorial test (texture, odor, color and test).

Research paper thumbnail of Efficiency of post-preparation treatment by gamma radiation to guarantee quality properties of plum molasses

International Journal of Radiation Biology

Research paper thumbnail of Original Research Paper Study of the Quality of Syrian Olive Oil Extracted from Irradiated and Un-Irradiated Fruit and Fruit Fleshes

The effects of 0, 2 and 3 kGy doses of gamma rays in chemical and physical properties of olive oi... more The effects of 0, 2 and 3 kGy doses of gamma rays in chemical and physical properties of olive oils extracted from whole and flesh of olive fruits were investigated. The results indicated that the acid value of samples ranged from 0.32 to 1.78%, the peroxide value ranged from 4.79 to 21.19 mEq O2 kg-1 oil, iodine value ranged from 81.73 to 91.25 g I2 100 g-1 oil, saponification value ranged from 185.93 to 197.71 mg KOH g-1 oil, thiobarbituric acid (TBA) value ranged from 0.028 to 0.057 mg MDA kg-1 oil, refractive index ranged 1.4642 to 1.4691 nD at 25 o C, viscosity ranged from 126.33 to 162.00 mPa. s, and total phenolic ranged from 42.73 to 339.52 mg gallic acid kg-1 oil. The effect of gamma irradiation on the quality properties of olive oil was minimized.

Research paper thumbnail of Use of Irradiation to Control Microorganisms and Extend the Refrigerated Market Life of Chicken Sausage

Innovative Romanian Food Biotechnology, 2013

This study investigated the microbial, chemical and sensorial properties of chicken sausage expos... more This study investigated the microbial, chemical and sensorial properties of chicken sausage exposed to gamma irradiation and stored at 0-4 o C. Chicken sausage was treated with 0, 2, 4 or 6 kGy doses of gamma irradiation. Microbial, chemical, and sensory analyses of chicken sausage were evaluated at 0, 4, 8, 12, 16 and 20 weeks of storage. Irradiation at 2, 4 and 6 kGy significantly reduced the counts of total viable (mesophilic aerobic) plate counts (TPCs), fecal coliform and yeast load and prolonged the refrigerated shelf-life of chicken sausage. Irradiation significantly decreased their amount of total acidity, volatile basic nitrogen (VBN), and thiobarbituric acid reactive substances (TBARS), while storage increased the total acidity, VBN and TBARS for irradiated and non-irradiated samples. The percentage of protein slightly increased in irradiated samples with higher doses, while the percentage of fat significantly decreased. Gamma irradiation showed no significant effect on th...

Research paper thumbnail of Biochemical study of oil extracted from gamma irradiated sunflower ( Helianthus annuus l . ) seeds

The purpose of this study was to evaluate the occurrence of lipid oxidation in sunflower (Heliant... more The purpose of this study was to evaluate the occurrence of lipid oxidation in sunflower (Helianthus annuus L.) oil extracted from seeds which were irradiated with 3, 6 and 9 kGy of gamma radiation and stored for 6 and 12 months. The quality characteristics of extracted sunflower oils acidity value (AV), peroxide value (PV), iodine value (IV), saponification value (SV), thiobarbituric acid value (TBA) and refractive index (RI)), and color values (L*, a*, b* and Evalues) were analyzed. Irradiation doses and storage time significantly (p<0.05) increased the AV and PV, and only the storage time significantly (p<0.05) increased the TBA value and RI, while both irradiation doses and storage time had no significant (p>0.05) effect on IV and SV. Storage time had more pronounced effect on AV, PV, TBA and RI than irradiation. Gamma irradiation had a significant (p<0.05) effect on all color parameters of sunflower seeds oil including lightness (L*-value), redness (a*-value), yell...

Research paper thumbnail of Innovative Thinking for Sustainable Use of Terrestrial Resources in Abu Dhabi Emirate Through Scientific Soil Inventory and Policy Development

Developments in Soil Classification, Land Use Planning and Policy Implications, 2013

Abu Dhabi is the largest of the seven emirates that comprise the United Arab Emirates (UAE). The ... more Abu Dhabi is the largest of the seven emirates that comprise the United Arab Emirates (UAE). The total area of the UAE is about 82,880 km 2. Abu Dhabi Emirate occupies more than 87% of mainland plus a string of coastal islands extending into the Arabian Gulf. The Emirate's leaders and population have a close af fi nity with the land and believe that careful agricultural development will be an important part of its future destiny and should be undertaken on a sustainable basis. With this aim, fourth-order extensive survey of Abu Dhabi Emirate was initiated in 2006 and completed in 2009. The fi eld survey was completed through investigating 22,000 sites covering 5.5 × 10 6 ha, supplemented with typical pro fi les description,

Research paper thumbnail of Effect of Gamma Irradiation on Peanut (Arachis Hypogaea.L)

Arab Gulf Journal of Scientific Research

This work report the effect of irradiation with gamma rays (1, 2 and 3 kGy) on the chemical compo... more This work report the effect of irradiation with gamma rays (1, 2 and 3 kGy) on the chemical composition, microbial loads, chemical characteristics and sensorial properties of the peanut seeds. The data obtained from the experiments showed that gamma irradiation process has no effect on the proximate composition (water content, proteins, sugars, lipids, and ash), and chemical attributes (free fatty acids, pH value and based nitrogen value (BVN)) of peanut seeds. Irradiation was found to cause significant reduction in microbial load and no fungal colonies were detected in irradiated samples with 2 and 3 kGy. Bacterial and fungal load of irradiated peanut seeds and there comparison with control samples suggest that gamma irradiation treatment at low doses is an effective post-harvest treatment and quarantine control for fungal load. However, non-irradiated and irradiated peanut seeds did not show significant differences in the sensorial test (texture, odor, color and test).

Research paper thumbnail of Efficiency of post-preparation treatment by gamma radiation to guarantee quality properties of plum molasses

International Journal of Radiation Biology

Research paper thumbnail of Original Research Paper Study of the Quality of Syrian Olive Oil Extracted from Irradiated and Un-Irradiated Fruit and Fruit Fleshes

The effects of 0, 2 and 3 kGy doses of gamma rays in chemical and physical properties of olive oi... more The effects of 0, 2 and 3 kGy doses of gamma rays in chemical and physical properties of olive oils extracted from whole and flesh of olive fruits were investigated. The results indicated that the acid value of samples ranged from 0.32 to 1.78%, the peroxide value ranged from 4.79 to 21.19 mEq O2 kg-1 oil, iodine value ranged from 81.73 to 91.25 g I2 100 g-1 oil, saponification value ranged from 185.93 to 197.71 mg KOH g-1 oil, thiobarbituric acid (TBA) value ranged from 0.028 to 0.057 mg MDA kg-1 oil, refractive index ranged 1.4642 to 1.4691 nD at 25 o C, viscosity ranged from 126.33 to 162.00 mPa. s, and total phenolic ranged from 42.73 to 339.52 mg gallic acid kg-1 oil. The effect of gamma irradiation on the quality properties of olive oil was minimized.

Research paper thumbnail of Use of Irradiation to Control Microorganisms and Extend the Refrigerated Market Life of Chicken Sausage

Innovative Romanian Food Biotechnology, 2013

This study investigated the microbial, chemical and sensorial properties of chicken sausage expos... more This study investigated the microbial, chemical and sensorial properties of chicken sausage exposed to gamma irradiation and stored at 0-4 o C. Chicken sausage was treated with 0, 2, 4 or 6 kGy doses of gamma irradiation. Microbial, chemical, and sensory analyses of chicken sausage were evaluated at 0, 4, 8, 12, 16 and 20 weeks of storage. Irradiation at 2, 4 and 6 kGy significantly reduced the counts of total viable (mesophilic aerobic) plate counts (TPCs), fecal coliform and yeast load and prolonged the refrigerated shelf-life of chicken sausage. Irradiation significantly decreased their amount of total acidity, volatile basic nitrogen (VBN), and thiobarbituric acid reactive substances (TBARS), while storage increased the total acidity, VBN and TBARS for irradiated and non-irradiated samples. The percentage of protein slightly increased in irradiated samples with higher doses, while the percentage of fat significantly decreased. Gamma irradiation showed no significant effect on th...

Research paper thumbnail of Biochemical study of oil extracted from gamma irradiated sunflower ( Helianthus annuus l . ) seeds

The purpose of this study was to evaluate the occurrence of lipid oxidation in sunflower (Heliant... more The purpose of this study was to evaluate the occurrence of lipid oxidation in sunflower (Helianthus annuus L.) oil extracted from seeds which were irradiated with 3, 6 and 9 kGy of gamma radiation and stored for 6 and 12 months. The quality characteristics of extracted sunflower oils acidity value (AV), peroxide value (PV), iodine value (IV), saponification value (SV), thiobarbituric acid value (TBA) and refractive index (RI)), and color values (L*, a*, b* and Evalues) were analyzed. Irradiation doses and storage time significantly (p<0.05) increased the AV and PV, and only the storage time significantly (p<0.05) increased the TBA value and RI, while both irradiation doses and storage time had no significant (p>0.05) effect on IV and SV. Storage time had more pronounced effect on AV, PV, TBA and RI than irradiation. Gamma irradiation had a significant (p<0.05) effect on all color parameters of sunflower seeds oil including lightness (L*-value), redness (a*-value), yell...

Research paper thumbnail of Innovative Thinking for Sustainable Use of Terrestrial Resources in Abu Dhabi Emirate Through Scientific Soil Inventory and Policy Development

Developments in Soil Classification, Land Use Planning and Policy Implications, 2013

Abu Dhabi is the largest of the seven emirates that comprise the United Arab Emirates (UAE). The ... more Abu Dhabi is the largest of the seven emirates that comprise the United Arab Emirates (UAE). The total area of the UAE is about 82,880 km 2. Abu Dhabi Emirate occupies more than 87% of mainland plus a string of coastal islands extending into the Arabian Gulf. The Emirate's leaders and population have a close af fi nity with the land and believe that careful agricultural development will be an important part of its future destiny and should be undertaken on a sustainable basis. With this aim, fourth-order extensive survey of Abu Dhabi Emirate was initiated in 2006 and completed in 2009. The fi eld survey was completed through investigating 22,000 sites covering 5.5 × 10 6 ha, supplemented with typical pro fi les description,