Search Results - "Barakat, Assem O"

Persistent organochlorine pesticide and PCB residues in surface sediments of Lake Qarun, a protected area of Egypt by Barakat, Assem O., Khairy, Mohammed, Aukaily, Inas

“…► High levels of OCs were found at sites near wastewater discharges. ► Ubiquitous contaminants were endrin, γ-HCH, aldrin, CHLs, and endosulfan. ► The…”
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Distribution and characteristics of PAHs in sediments from the Mediterranean coastal environment of Egypt by Barakat, Assem O., Mostafa, Alaa, Wade, Terry L., Sweet, Stephen T., El Sayed, Nadia B.

“…► PAHs are ubiquitous contaminants in the Egyptian Mediterranean coastal sediments. ► Industrialized and urbanized region showed high level of PAHs…”
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Distribution and ecological risk of organochlorine pesticides and polychlorinated biphenyls in sediments from the Mediterranean coastal environment of Egypt by Barakat, Assem O., Mostafa, Alaa, Wade, Terry L., Sweet, Stephen T., El Sayed, Nadia B.

“…•High levels of OCs were found near urban areas, shipping and industrial activities.•Ubiquitous contaminants were PCBs, DDTs, and chloropyrifos.•DDT and HCHs…”
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Assessment of persistent organochlorine pollutants in sediments from Lake Manzala, Egypt by Barakat, Assem O., Mostafa, Alaa, Wade, Terry L., Sweet, Stephen T., El Sayed, Nadia B.

“…► High levels of OCs were found at sites near wastewater discharges. ► The composition of DDT and its metabolites suggest old input of DDT. ► Levels of OCs…”
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Spatial distribution and temporal trends of persistent organochlorine pollutants in sediments from Lake Maryut, Alexandria, Egypt by Barakat, Assem O., Mostafa, Alaa, Wade, Terry L., Sweet, Stephen T., El Sayed, Nadia B.

“…► High levels of POPs were found near sewage discharge and industrial areas. ► Ubiquitous contaminants were PCBs, DDTs, CHLs, and CBs. ► POPs levels were…”
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Assessment of persistent toxic substances in the environment of Egypt by Barakat, Assem O

“…The objective of this review is to provide a comprehensive assessment of the threats posed by persistent toxic substances (PTS) to the environment and human…”
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Alkylated phenol series in lacustrine black shales from the Nördlinger Ries, southern Germany by Barakat, Assem O., Baumgart, Susan, Brocks, Peter, Scholz-Böttcher, Barbara M., Rullkötter, Jürgen

“…Several series of alkylated phenols were detected for the first time in the extractable bitumens of organic matter‐rich sediments from the Nördlinger Ries…”
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Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Sediments of Lake Manzala, Egypt by Barakat, Assem O, Mostafa, Alaa, El-Sayed, Nadia B, Wade, Terry L, Sweet, Stephen T

“…This investigation represents the first extensive study of the spatial distribution, sources, and potential effects of polycyclic aromatic hydrocarbons (PAHs)…”
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Bioaccumulation of organochlorine contaminants in fish species from Lake Qarun, a protected area of Egypt by Barakat, Assem O., Khairy, Mohammed, Aukaily, Inas

“…The purpose of this study was to determine concentrations of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in Nile tilapia (Oreochromis…”
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Organochlorine pesticides and polychlorinated biphenyls in sewage sludge from Egypt by Barakat, Assem O., Khairy, Mohammed A., Mahmoud, Mahmoud R.

“…The purpose of this study was to determine the levels, distribution and toxicological potential of organochlorine pesticides (OCPs) and polychlorinated…”
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Distribution and characteristics of polycyclic aromatic hydrocarbons (PAHs) in sediments of Hadhramout coastal area, Gulf of Aden, Yemen by Mostafa, Alaa R., Wade, Terry L., Sweet, Stephen T., Al-Alimi, Abdel Kawi A., Barakat, Assem O.

“…To assess the status of polycyclic aromatic hydrocarbon (PAH) contamination in sediments of Hadhramout coastal area, Gulf of Aden, Yemen, 17 surface sediment…”
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Ruthenium tetroxide oxidation of immature sulfur-rich kerogens from the Nördlinger Ries (southern Germany) by Barakat, Assem O., Scholz-Böttcher, Barbara M., Rullkötter, Jürgen

“…► We use RuO4 oxidation for structural investigation of sulfur-rich kerogens. ► Alkyl–aryl ether groups are present in the kerogen. ► A scarcely reported…”
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Organochlorine pesticides and PCB residues in sediments of Alexandria Harbour, Egypt by Barakat, Assem O, Kim, Moonkoo, Qian, Yoarong, Wade, Terry L

“…Persistent organochlorine compound concentrations were determined for 23 surface sediment samples collected from Alexandria Harbor, Egypt. Total PCB…”
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Structural investigations of Monterey kerogen by sequential chemical degradation by Barakat, Assem O., Scholz-Böttcher, Barbara M., Rullkötter, Jürgen

“…► We use successive degradation steps involving Na2Cr2O7/AcOH and RuO4 on kerogen. ► Tetrapyrrole pigments, occur ether- as well as sulfur-bound in the…”
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Lipids in a sulfur-rich lacustrine sediment from the N^|^ouml;rdlinger Ries (southern Germany) with a focus on free and bound sterols by BARAKAT, ASSEM O., SCHOLZ-B^|^Ouml;TTCHER, BARBARA M., RULLK^|^Ouml;TTER, J^|^Uuml;RGEN

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Metals in surface sediments and marine bivalves of the Hadhramout coastal area, Gulf of Aden, Yemen by Mostafa, Alaa R., Al-Alimi, Abdel Kawi A., Barakat, Assem O.

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PAHs and petroleum markers in the atmospheric environment of Alexandria City, Egypt by BARAKAT, Assem O

“…To evaluate the chemical fingerprint of hydrocarbons in airborneorganic matter in the arid environment of Alexandria City, Egypt,the compositions of aliphatic…”
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Extractable and bound fatty acids in core sediments from the Nördlinger Ries, southern Germany by Barakat, Assem O., Rullkötter, Jürgen

“…Gas chromatography (g.c.) and gas chromatography-mass spectrometry (g.c.-m.s.) analyses of fatty acids directly extracted by organic solvents from five…”
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Assessment of persistent organochlorine residues in sediments of Hadramout coastal area, Gulf of Aden, Yemen by Mostafa, Alaa R., Wade, Terry L., Sweet, Stephen T., Al-Alimi, Abdel Kawi A., Barakat, Assem O.

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Chemical characterization of naturally weathered oil residues in arid terrestrial environment in Al-Alamein, Egypt by Barakat, Assem O, Qian, Yaorong, Kim, Moonkoo, Kennicutt, Mahlon C

“…The main objective of this study was to investigate compositional changes in a range of source- and weathering-dependent molecular parameters in oil residues…”
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