Khaled A Osman | Alexandria University (original) (raw)

Papers by Khaled A Osman

Asian Journal of Chemistry, 2015

The present study is dealing with the development of a phytoremediation system such as using the ... more The present study is dealing with the development of a phytoremediation system such as using the herbal plant ryegrass, Lolium multiflorum as excluder plant to investigate its ability to exclude the two metals, copper and zinc from contaminated soil. The plant was grown in different levels of metalscontaminated soil. The translocation of metals in the plant was compared considering root to shoot transport and redistribution of metals in the root and shoot system. The trace metal contents from root and shoot parts were determined using atomic absorption spectrometer. The results showed that the percent of copper transferred to ryegrass plant was 96.01%, while the remained percentage in soil was 3.99% following 60 days of treatment. On the other hand, the percent of zinc transferred to ryegrass plant was 84.51%, while the remained percentage in soil was 15.49% following the same time interval. The soil-plant transfer index in root and shoot system of ryegrass was found to be 0.60 and 0.37, respectively. However these values in case of zinc were 0.51 and 0.32, respectively. These findings indicated that ryegrass is a promising excluder plant and able to exclude either copper or zinc from soil.

Journal of Environmental Science and Health Part B Pesticides Food Contaminants and Agricultural Wastes, Dec 1, 1992

The bran toxic baits (0.5 % w/w) of five oxime carbamate pesticides; aldicarb, aldoxycarb, methom... more The bran toxic baits (0.5 % w/w) of five oxime carbamate pesticides; aldicarb, aldoxycarb, methomyl, oxamyl and thiofanox were tested for their molluscicidal activity against Theba pisana snails under Laboratory conditions. In addition, the in vivo effects of these compounds on seven vital enzymes namely Acetylcholin‐esterase (AchE), glutathion‐S‐transferase (GST), glutamic oxlaoacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), acid phosphatase (AcP),

International Journal of Food Agriculture and Environment, 2007

... J. Food Sci. Technol. 30: 442-443. 34 Costa, L., Albuquerque, M., Trugo, L., Quinteiro, L., B... more ... J. Food Sci. Technol. 30: 442-443. 34 Costa, L., Albuquerque, M., Trugo, L., Quinteiro, L., Barth, O., Ribeiro, M., and De Maria, C. 1999. ... Cd, 228.80, 0.7, 0-2, 12, 1, 0.9991. Table 2. Physicochemical properties of honey samples collected from Al-Qassim region, Saudi Arabia. ...

Journal of food science and technology, 2015

Distilled water and ozonated water as postharvest wash treatments for 15-60 min as dipping times ... more Distilled water and ozonated water as postharvest wash treatments for 15-60 min as dipping times were tested to remove two acaricides namely, dicofol and amitraz from different varieties of date fruits. Recovered amount of the acaricides was extracted using solid phase extraction (SPE) and then analyzed by gas chromatography-mass spectrometry (GC-MS). Dicofol removal percentages in the presence of ozone increased in the order of Nabtet Aly > Nabout Seif > Khalas > Sakay, while amitraz removal increased in the order of Nabtet Aly > Nabout Seif > Sakay > Khalas, respectively, and the percentages of residues on date fruits depended on the dipping time. Kinetic studies revealed that dicofol and amitraz were easily removable from date fruits treated with ozonated water. Ozone-treated date palm fruits were not associated with significant changes in antioxidant capacity, and phenolic and sugar contents. Due to the large amount of dates consumed by Saudi residents, a highe...

International Journal of Phytoremediation, 2015

The research was designated to study the ability of plants to bio-accumulate, translocate and rem... more The research was designated to study the ability of plants to bio-accumulate, translocate and remove the heavy metals, lead and cadmium from contaminated soil. The herbal plant ryegrass, Lolium multiflorum was investigated as a bio-accumulator plant for these metals. The translocation of these heavy metals in the herbal plant was compared considering root to shoot transport and redistribution of metals in the root and shoot system. The trace metal contents from root and shoot parts were determined using atomic absorption spectrometer. The results showed that the percent of lead and cadmium transferred to ryegrass plant were averaged as 51.39, and 74.57%, respectively, while those remained in the soil were averaged as 48.61 and 25.43% following 60 days of treatment. The soil-plant transfer index in root and shoot system of ryegrass was found to be 0.32 and 0.20 for lead, and 0.50 and 0.25 for cadmium. These findings indicated that the herbal plant ryegrass, Lolium multiflorum is a good accumulator for cadmium than lead. The soil-plant transfer factor (the conc. of heavy metal in plant to the conc. in soil) indicated that the mechanism of soil remedy using the investigated plant is phytoextraction where the amounts of heavy metals transferred by plant roots into the above ground portions were higher than that remained in the soil. The method offers green technology solution for the contamination problem since it is effective technology with minimal impact on the environment and can be easily used for soil remedy.

The currently used techniques for soil remediation such as landfilling or metal extraction using ... more The currently used techniques for soil remediation such as landfilling or metal extraction using toxic agents as well as the use of metal-chelating bio-surfactant need to be replaced by green technology solution. Therefore, the research was designated to study the ability of plants to bio-accumulate, translocate and remove some metals such as copper, zinc, lead and cadmium from contaminated soil. The herbal plant ryegrass, Lolium multiflorum was investigated as a bio-accumulator plant for these metals. The translocation of these heavy metals in ryegrass was compared considering root to shoot transport and redistribution of metals in the root and shoot system. The trace metal contents from root and shoot parts were determined using atomic absorption spectrometer. The results showed that the percent of copper, zinc, lead and cadmium transferred to ryegrass plant were 96.01, 84.51, 51.39, and 74.57%, respectively, while those remained in the soil were 3.81, 14.42, 45.16 and 27.40 % fol...

Vitamin E and C and selenium are potential antioxidants, known to be able to protect cells agains... more Vitamin E and C and selenium are potential antioxidants, known to be able to protect cells against oxidative damage. In vitro changes in antioxidant systems and protective role of selenium and a combination of vitamin C and vitamin E on oxidative damage in erythrocytes and hepatocytes induced by atrazine (AT), dimethoate (DM), or endosulfan (ES) at three different levels of 10, 20, and 30 mM for each in rat were investigated. Levels of lipid peroxidation (nmoles MDA/mg protein), glutathione content (µmole GSH/mg protein) and glutathione peroxidase level (µmoles NADPH/min/mg protein) were determined in erythrocytes and hepatocytes following treatment. In comparison with the control, pesticides stimulated thiobarbituric acid reactive substances (TBARS) activity and glutathione peroxidase activity, enhanced the glutathione contents. Treatment with selenium and a combination of vitamin E and/or vitamin C potentially reduced the free radicals in erythrocytes or hepatocytes and ameliorated the oxidative stress induced by such pesticides. The results suggested that pesticides treatment increases in vitro lipid peroxidation, glutathione peroxidase level and glutathione content by increasing oxidative stress in erythrocytes and hepatocytes of rats and selenium and a combination of vitamin E and vitamin C can reduce this lipoperoxidative effect.

Asian Journal of Chemistry, 2015

The present study is dealing with the development of a phytoremediation system such as using the ... more The present study is dealing with the development of a phytoremediation system such as using the herbal plant ryegrass, Lolium multiflorum as excluder plant to investigate its ability to exclude the two metals, copper and zinc from contaminated soil. The plant was grown in different levels of metalscontaminated soil. The translocation of metals in the plant was compared considering root to shoot transport and redistribution of metals in the root and shoot system. The trace metal contents from root and shoot parts were determined using atomic absorption spectrometer. The results showed that the percent of copper transferred to ryegrass plant was 96.01%, while the remained percentage in soil was 3.99% following 60 days of treatment. On the other hand, the percent of zinc transferred to ryegrass plant was 84.51%, while the remained percentage in soil was 15.49% following the same time interval. The soil-plant transfer index in root and shoot system of ryegrass was found to be 0.60 and 0.37, respectively. However these values in case of zinc were 0.51 and 0.32, respectively. These findings indicated that ryegrass is a promising excluder plant and able to exclude either copper or zinc from soil.

Journal of Environmental Science and Health Part B Pesticides Food Contaminants and Agricultural Wastes, Dec 1, 1992

The bran toxic baits (0.5 % w/w) of five oxime carbamate pesticides; aldicarb, aldoxycarb, methom... more The bran toxic baits (0.5 % w/w) of five oxime carbamate pesticides; aldicarb, aldoxycarb, methomyl, oxamyl and thiofanox were tested for their molluscicidal activity against Theba pisana snails under Laboratory conditions. In addition, the in vivo effects of these compounds on seven vital enzymes namely Acetylcholin‐esterase (AchE), glutathion‐S‐transferase (GST), glutamic oxlaoacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), acid phosphatase (AcP),

International Journal of Food Agriculture and Environment, 2007

... J. Food Sci. Technol. 30: 442-443. 34 Costa, L., Albuquerque, M., Trugo, L., Quinteiro, L., B... more ... J. Food Sci. Technol. 30: 442-443. 34 Costa, L., Albuquerque, M., Trugo, L., Quinteiro, L., Barth, O., Ribeiro, M., and De Maria, C. 1999. ... Cd, 228.80, 0.7, 0-2, 12, 1, 0.9991. Table 2. Physicochemical properties of honey samples collected from Al-Qassim region, Saudi Arabia. ...

Journal of food science and technology, 2015

Distilled water and ozonated water as postharvest wash treatments for 15-60 min as dipping times ... more Distilled water and ozonated water as postharvest wash treatments for 15-60 min as dipping times were tested to remove two acaricides namely, dicofol and amitraz from different varieties of date fruits. Recovered amount of the acaricides was extracted using solid phase extraction (SPE) and then analyzed by gas chromatography-mass spectrometry (GC-MS). Dicofol removal percentages in the presence of ozone increased in the order of Nabtet Aly > Nabout Seif > Khalas > Sakay, while amitraz removal increased in the order of Nabtet Aly > Nabout Seif > Sakay > Khalas, respectively, and the percentages of residues on date fruits depended on the dipping time. Kinetic studies revealed that dicofol and amitraz were easily removable from date fruits treated with ozonated water. Ozone-treated date palm fruits were not associated with significant changes in antioxidant capacity, and phenolic and sugar contents. Due to the large amount of dates consumed by Saudi residents, a highe...

International Journal of Phytoremediation, 2015

The research was designated to study the ability of plants to bio-accumulate, translocate and rem... more The research was designated to study the ability of plants to bio-accumulate, translocate and remove the heavy metals, lead and cadmium from contaminated soil. The herbal plant ryegrass, Lolium multiflorum was investigated as a bio-accumulator plant for these metals. The translocation of these heavy metals in the herbal plant was compared considering root to shoot transport and redistribution of metals in the root and shoot system. The trace metal contents from root and shoot parts were determined using atomic absorption spectrometer. The results showed that the percent of lead and cadmium transferred to ryegrass plant were averaged as 51.39, and 74.57%, respectively, while those remained in the soil were averaged as 48.61 and 25.43% following 60 days of treatment. The soil-plant transfer index in root and shoot system of ryegrass was found to be 0.32 and 0.20 for lead, and 0.50 and 0.25 for cadmium. These findings indicated that the herbal plant ryegrass, Lolium multiflorum is a good accumulator for cadmium than lead. The soil-plant transfer factor (the conc. of heavy metal in plant to the conc. in soil) indicated that the mechanism of soil remedy using the investigated plant is phytoextraction where the amounts of heavy metals transferred by plant roots into the above ground portions were higher than that remained in the soil. The method offers green technology solution for the contamination problem since it is effective technology with minimal impact on the environment and can be easily used for soil remedy.

The currently used techniques for soil remediation such as landfilling or metal extraction using ... more The currently used techniques for soil remediation such as landfilling or metal extraction using toxic agents as well as the use of metal-chelating bio-surfactant need to be replaced by green technology solution. Therefore, the research was designated to study the ability of plants to bio-accumulate, translocate and remove some metals such as copper, zinc, lead and cadmium from contaminated soil. The herbal plant ryegrass, Lolium multiflorum was investigated as a bio-accumulator plant for these metals. The translocation of these heavy metals in ryegrass was compared considering root to shoot transport and redistribution of metals in the root and shoot system. The trace metal contents from root and shoot parts were determined using atomic absorption spectrometer. The results showed that the percent of copper, zinc, lead and cadmium transferred to ryegrass plant were 96.01, 84.51, 51.39, and 74.57%, respectively, while those remained in the soil were 3.81, 14.42, 45.16 and 27.40 % fol...

Vitamin E and C and selenium are potential antioxidants, known to be able to protect cells agains... more Vitamin E and C and selenium are potential antioxidants, known to be able to protect cells against oxidative damage. In vitro changes in antioxidant systems and protective role of selenium and a combination of vitamin C and vitamin E on oxidative damage in erythrocytes and hepatocytes induced by atrazine (AT), dimethoate (DM), or endosulfan (ES) at three different levels of 10, 20, and 30 mM for each in rat were investigated. Levels of lipid peroxidation (nmoles MDA/mg protein), glutathione content (µmole GSH/mg protein) and glutathione peroxidase level (µmoles NADPH/min/mg protein) were determined in erythrocytes and hepatocytes following treatment. In comparison with the control, pesticides stimulated thiobarbituric acid reactive substances (TBARS) activity and glutathione peroxidase activity, enhanced the glutathione contents. Treatment with selenium and a combination of vitamin E and/or vitamin C potentially reduced the free radicals in erythrocytes or hepatocytes and ameliorated the oxidative stress induced by such pesticides. The results suggested that pesticides treatment increases in vitro lipid peroxidation, glutathione peroxidase level and glutathione content by increasing oxidative stress in erythrocytes and hepatocytes of rats and selenium and a combination of vitamin E and vitamin C can reduce this lipoperoxidative effect.