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Uheida, Abdusalam
Publications (10 of 12) Show all publications
Sallam, A., Hemeda, S., Toprak, M., Muhammed, M., Hassan, M. & Uheida, A. (2019). CT Scanning and MATLAB Calculations for Preservation of Coptic Mural Paintings in Historic Egyptian Monasteries. Scientific Reports, 9, Article ID 3903.
Open this publication in new window or tab >>CT Scanning and MATLAB Calculations for Preservation of Coptic Mural Paintings in Historic Egyptian Monasteries
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 3903Article in journal (Refereed) Published
Abstract [en]

Investigations of Coptic mural paintings in historic churches and monasteries demand a deep understanding of the micro structure of the mural painting layers. The main objective of the present study is to study the efficiency of new avenues of computed X-ray tomography (CT Scan) and MATLAB in the analysis of Coptic mural paintings, either in the form of images or videos made to collect information about the physical characteristics of the material structure of the layers of mural paintings. These advanced techniques have been used in the investigation of samples of Coptic mural paintings dating back to the V-VIII century A.D, which have been collected from several locations in the Coptic monasteries in Upper Egypt. The application of CT-scanning is a powerful non-destructive tool for imaging and investigation which can be applied to the preservation of monuments made from many different materials. The second stage of research will be to characterize the materials through analytical techniques including XRD, XRF, EDX and FTIR to confirm the findings of CT scanning and to provide additional information concerning the materials used and their deterioration processes. This paper presents the results of the first pilot study in which CT scan and MATLAB have been utilized in combination for the non-destructive evaluation and investigation of Coptic mural paintings in Upper Egypt. The examinations have been carried out on mural painting samples from three important Coptic monasteries in Upper Egypt: the Qubbat Al Hawa Monastery in Aswan, the Saint Simeon Monastery in Aswan and the Saint Matthew the Potter Monastery in Luxor. This multi-stranded investigation has provided us with important information about the physical structure of the paintings, grains dimensions, grain texture, pore media characterization which include the micro porosity, BET and TPV, surface rendering, and calculation of the points in the surface through calculations completed using MATLAB. CT scanning assisted in the investigation and analyses of image surface details, and helped to visualize hidden micro structures that would otherwise be inaccessible due to over painting.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-247812 (URN)10.1038/s41598-019-40297-z (DOI)000460508600133 ()30846738 (PubMedID)2-s2.0-85062614465 (Scopus ID)
Note

QC 20190401

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-04-01Bibliographically approved
Zohdi, Z., Hashemi, M., Uheida, A., Moein, M. M. & Abdel-Rehim, M. (2019). Graphene Oxide Tablets for Sample Preparation of Drugs in Biological Fluids: Determination of Omeprazole in Human Saliva for Liquid Chromatography Tandem Mass Spectrometry. Molecules, 24(7), Article ID 1191.
Open this publication in new window or tab >>Graphene Oxide Tablets for Sample Preparation of Drugs in Biological Fluids: Determination of Omeprazole in Human Saliva for Liquid Chromatography Tandem Mass Spectrometry
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2019 (English)In: Molecules, ISSN 1420-3049, E-ISSN 1420-3049, Vol. 24, no 7, article id 1191Article in journal (Refereed) Published
Abstract [en]

In this study, a novel sort of sample preparation sorbent was developed, by preparing thin layer graphene oxide tablets (GO-Tabs) utilizing a mixture of graphene oxide and polyethylene glycol on a polyethylene substrate. The GO-Tabs were used for extraction and concentration of omeprazole (OME) in human saliva samples. The determination of OME was carried out using liquid chromatography-tandem mass spectrometry (LC-MS/MS) under gradient LC conditions and in the positive ion mode (ESI+) with mass transitions of m/z 346.3 -> 198.0 for OME and m/z 369.98 -> 252.0 for the internal standard. Standard calibration for the saliva samples was in the range of 2.0-2000 nmol L-1. Limits of detection and quantification were 0.05 and 2.0 nmol L-1, respectively. Method validation showed good method accuracy and precision; the inter-day precision values ranged from 5.7 to 8.3 (%RSD), and the accuracy of determinations varied from -11.8% to 13.3% (% deviation from nominal values). The extraction recovery was 60%, and GO-Tabs could be re-used for more than ten extractions without deterioration in recovery. In this study, the determination of OME in real human saliva samples using GO-Tab extraction was validated.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
graphene oxide, omeprazole, liquid chromatography, tandem mass spectrometry, saliva, GO-Tabs
National Category
Biophysics
Identifiers
urn:nbn:se:kth:diva-251343 (URN)10.3390/molecules24071191 (DOI)000464946300002 ()30934659 (PubMedID)2-s2.0-85063759590 (Scopus ID)
Note

QC 20190521

Available from: 2019-05-21 Created: 2019-05-21 Last updated: 2019-05-21Bibliographically approved
Yohai, L., Giraldo Mejía, H., Procaccini, R., Pellice, S., Laxman Kunjali, K., Dutta, J. & Uheida, A. (2019). Nanocomposite functionalized membranes based on silica nanoparticles oss-linked to electrospun nanofibrous support for arsenic(v) sorption from contaminated underground water. RSC Advances, 9(15), 8280-8289
Open this publication in new window or tab >>Nanocomposite functionalized membranes based on silica nanoparticles oss-linked to electrospun nanofibrous support for arsenic(v) sorption from contaminated underground water
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2019 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 9, no 15, p. 8280-8289Article in journal (Refereed) Published
Abstract [en]

Nanocomposite functionalized membranes were synthesized using surface functionalized mesoporous silica nanoparticles (MCM-NH2 or MCM-PEI) cross-linked to a modified polyacrylonitrile (mPAN) nanofibrous substrate for the removal of 1 mg L-1 of As(V); a concentration much higher than what has been reported for underground water in Argentina. Adsorption studies were carried out in batch mode at pH 8 with nanoparticles in colloidal form, as well as the nanoparticles supported on the modified PAN membranes (mPAN/MCM-NH2 and mPAN/MCM-PEI). Results indicate a twenty-fold improvement in As(V) adsorption with supported nanoparticles (nanocomposite membranes) as opposed to their colloidal form. The adsorption efficiency could be further enhanced by modifying the nanocomposite membrane surface with Fe3+ (mPAN/MCM-NH2-Fe3+ and mPAN/MCM-PEI-Fe3+) which resulted in more than 95% arsenic being removed within the first 15 minutes and a specific arsenic adsorption capacity of 4.61 mg g(-1) and 5.89 mg g(-1) for mPAN/MCM-NH2-Fe3+ and mPAN/MCM-PEI-Fe3+ nanocomposite membranes, respectively. The adsorption characteristics were observed to follow a pseudo-first order behavior. The results suggest that the synthesized materials are excellent for quick and efficient reduction of As(V) concentrations below the WHO guidelines and show promise for future applications.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-248339 (URN)10.1039/c8ra09866b (DOI)000461445300017 ()2-s2.0-85063011404 (Scopus ID)
Note

QC 20190503

Available from: 2019-05-03 Created: 2019-05-03 Last updated: 2019-05-03Bibliographically approved
Uheida, A., Mohamed, A., Belaqziz, M. & Nasser, W. S. (2019). Photocatalytic degradation of Ibuprofen, Naproxen, and Cetirizine using PAN-MWCNT nanofibers crosslinked TiO2-NH2 nanoparticles under visible light irradiation. Separation and Purification Technology, 212, 110-118
Open this publication in new window or tab >>Photocatalytic degradation of Ibuprofen, Naproxen, and Cetirizine using PAN-MWCNT nanofibers crosslinked TiO2-NH2 nanoparticles under visible light irradiation
2019 (English)In: Separation and Purification Technology, ISSN 1383-5866, E-ISSN 1873-3794, Vol. 212, p. 110-118Article in journal (Refereed) Published
Abstract [en]

In this work the photocatalytic degradation of pharmaceuticals (Ibuprofen, Cetirizine, and Naproxen) was evaluated using surface modified TiO2 nanoparticles immobilized on polyacrylonitrile/multiwall carbon nanotubes composite nanofibers. The photocatalytic degradation was studied under visible light (0.1 W/cm(2)) irradiation. Comparatively, the photocatalytic degradation of pharmaceuticals using PAN-CNT/TiO2-NH2 composite nanofibers was much more efficient than with PAN/TiO2-NH2 composite nanofibers under visible light irradiation. The results obtained showed that the photocatalytic efficiency of the studied pharmaceuticals is pH dependent in which more than 99% degradation was obtained at pH 2. Complete degradation of IBP, CTZ, and NPX was achieved within 200, 50, and 90 min, respectively under visible light.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
Pharmaceuticals, Photodegradation, Composite nanofibers, Visible light
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-244479 (URN)10.1016/j.seppur.2018.11.030 (DOI)000457814700013 ()2-s2.0-85056218684 (Scopus ID)
Note

QC 20190320

Available from: 2019-03-20 Created: 2019-03-20 Last updated: 2019-03-20Bibliographically approved
Karimiyan, H., Uheida, A., Hadjmohammadi, M., Moein, M. M. & Abdel-Rehim, M. (2019). Polyacrylonitrile / graphene oxide nanofibers for packed sorbent microextraction of drugs and their metabolites from human plasma samples. Talanta: The International Journal of Pure and Applied Analytical Chemistry, 201, 474-479
Open this publication in new window or tab >>Polyacrylonitrile / graphene oxide nanofibers for packed sorbent microextraction of drugs and their metabolites from human plasma samples
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2019 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 201, p. 474-479Article, review/survey (Refereed) Published
Abstract [en]

In the present study, a new graphene based nanofibers material (Polyacrylonitrile/Graphene Oxide (PAN/GO)) was used for microextraction by packed sorbent (MEPS). The PAN/GO nanofiber was synthesized using the electrospinning technique. MEPS online with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was utilized for the extraction and determination of two local anesthetic drugs (lidocaine, prilocaine) and their major metabolites (2,6-xylidine, o-toluidine) in human plasma samples. Parameters affecting the extraction efficiency were investigated and optimized (including sample pH, washing solution and elution solution). The validation of the method was based on FDA (Food and Drug Administration) guidelines for bioanalytical methods. The calibration curve ranged from 2.00 to 2000 nmol/L for lidocaine and prilocaine, and from 10.0 to 2000 nmol/L for 2,6-xylidine and o-toluidine. The coefficient of determination (R-2) values were 0.996, 0.995, 0.995, 0.996 (n = 3) for lidocaine, prilocaine, 2,6-xylidine and o-toluidine, respectively. The extraction recovery was 93.0% for lidocaine, 96.0% for prilocaine, 68.0% for 2,6-xylidine and 69.0% for o-toluidine. The limits of detection (LODs) were 0.25, 0.50, 2.50, 1.25 nmol/L for lidocaine, prilocaine, 2,6-xylidine and o-toluidine, respectively. The lower limits of quantification (LLOQs) were 2.0 nmol/L for lidocaine and prilocaine, and 10 nmol/L for 2,6-xylidine and o-toluidine, respectively. The accuracy values for the quality control (QC) samples were in the range of 91.0-111% for lidocaine, 92.0-118% for prilocaine, 84.0-98.0% for 2,6-xylidine and 82.0-90.0% for o-toluidine. The inter-day precisions for QC samples ranged from 7.0% to 11.8% for lidocaine, from 8.6% to 11.7% for prilocaine, from 8.0% to 10.0% for 2,6-xylidine and from 8.0% to 9.0% for o-toluidine. The matrix effect values were in the range of - 2.3% to - 8.6% for lidocaine, - 2.7% to - 10.2% for prilocaine, 4.8%-5.2% for 2, 6-xylidine and - 8.2% to 9.4% for o-toluidine.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Nanofibers, Polyacrylonitrile/graphene oxide, Microextraction by packed sorbent, Human plasma, Local anesthetics, LC-MS/MS
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-270818 (URN)10.1016/j.talanta.2019.04.027 (DOI)000471084300064 ()31122453 (PubMedID)2-s2.0-85066838131 (Scopus ID)
Note

QC 20200313

Available from: 2020-03-13 Created: 2020-03-13 Last updated: 2020-03-13Bibliographically approved
Khalil, A., Nasser, W. S., Osman, T. A., Toprak, M. S., Muhammed, M. & Uheida, A. (2019). Surface modified of polyacrylonitrile nanofibers by TiO2/MWCNT for photodegradation of organic dyes and pharmaceutical drugs under visible light irradiation. Environmental Research, 179, Article ID 108788.
Open this publication in new window or tab >>Surface modified of polyacrylonitrile nanofibers by TiO2/MWCNT for photodegradation of organic dyes and pharmaceutical drugs under visible light irradiation
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2019 (English)In: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 179, article id 108788Article in journal (Refereed) Published
Abstract [en]

This work describes the fabrication of two composite nanofibers systems containing polyacrylonitrile polymer (PAN), Multiwall carbon nanotubes (MWCNT) and Titania (TiO2) nanoparticles. Photodegradation experiments were performed to study the effect of various parameters including pH, catalyst dose, pollutant concentration and reaction time for three model compounds, methylene blue (MB), indigo carmine (IC), and ibuprofen (IBU) under visible light. Morphology and structure of the modified composite nanofibers were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric analysis (TGA), Photoluminescence (PL) spectroscopy, Raman spectra, and X-ray Photoelectron Spectra (XPS) analyses. The photocatalytic performance was achieved in a rather short time visible light (<30 min) and under low power intensity (125 W) compared to earlier reports. Kinetics data fitted well using pseudo-first order model to describe the mechanism of photocatalytic degradation processes. The stability and flexibility of the fabricated composite nanofibers allow their application in a continuous flow system and their re-use after several cycles.

Place, publisher, year, edition, pages
Academic Press, 2019
Keywords
Composite nanofibers, Photocatalytic, Photodegradation, Visible light
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-267885 (URN)10.1016/j.envres.2019.108788 (DOI)000497259100012 ()31590001 (PubMedID)2-s2.0-85072802227 (Scopus ID)
Note

QC 20200302

Available from: 2020-03-02 Created: 2020-03-02 Last updated: 2020-03-12Bibliographically approved
Mohamed, A., Salama, A., Nasser, W. S. & Uheida, A. (2018). Photodegradation of Ibuprofen, Cetirizine, and Naproxen by PAN-MWCNT/TiO2-NH2 nanofiber membrane under UV light irradiation. Environmental Sciences Europe, 30, Article ID 47.
Open this publication in new window or tab >>Photodegradation of Ibuprofen, Cetirizine, and Naproxen by PAN-MWCNT/TiO2-NH2 nanofiber membrane under UV light irradiation
2018 (English)In: Environmental Sciences Europe, ISSN 2190-4707, E-ISSN 2190-4715, Vol. 30, article id 47Article in journal (Refereed) Published
Abstract [en]

Background: In this study, the photodegradation of three pharmaceuticals, namely Ibuprofen (IBP), Naproxen (NPX), and Cetirizine (CIZ) in aqueous media was investigated under UV irradiation. The photocatalyst used in this work consists of surface functionalized titanium dioxide (TiO2-NH2) nanoparticles grafted into Polyacrylonitrile (PAN)/multi-walled carbon nanotube composite nanofibers. Surface modification of the fabricated composite nanofibers was illustrated using XRD, FTIR, and SEM analyses. Results: Sets of experiments were performed to study the effect of pharmaceuticals initial concentration (5-50 mg/L), solution pH (2-9), and irradiation time on the degradation efficiency. The results demonstrated that more than 99% degradation efficiency was obtained for IBP, CIZ, and NPX within 120, 40, and 25 min, respectively. Conclusions: Comparatively, the photocatalytic degradation of pharmaceuticals using PAN-CNT/TiO2-NH2 composite nanofibers was much more efficient than with PAN/TiO2-NH2 composite nanofibers.

Place, publisher, year, edition, pages
SPRINGEROPEN, 2018
Keywords
Photocatalytic, Cetirizine, Naproxen, Ibuprofen, Composite nanofibers, UV-light
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-240348 (URN)10.1186/s12302-018-0177-6 (DOI)000452025200001 ()2-s2.0-85057786194 (Scopus ID)
Note

QC 20181217

Available from: 2018-12-17 Created: 2018-12-17 Last updated: 2018-12-17Bibliographically approved
Yazdi, M. G., Ivanic, M., Mohamed, A. & Uheida, A. (2018). Surface modified composite nanofibers for the removal of indigo carmine dye from polluted water. RSC Advances, 8(43), 24588-24598
Open this publication in new window or tab >>Surface modified composite nanofibers for the removal of indigo carmine dye from polluted water
2018 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 8, no 43, p. 24588-24598Article in journal (Refereed) Published
Abstract [en]

Surface coated magnetite nanoparticles (Fe3O4 NPs) with 3-mercaptopropionic acid were immobilized on amidoximated polyacrilonitrile (APAN) nanofibers using electrospinning followed by crosslinking. The prepared composite nanofibers were characterized with Scanning Electron Microscopy (SEM), and Fourier Transform Infrared analysis (FTIR). The composite nanofiber was evaluated for the removal of indigo carmine dye from aqueous solutions. The effects of contact time, initial dye concentration, solution pH and adsorption equilibrium isotherms were studied. The adsorption of indigo carmine was found to be greatly affected by solution pH. The maximum loading capacity was determined to be 154.5 mg g(-1) at pH = 5. The experimental kinetic data were fitted well using a pseudo-first order model. The adsorption isotherm studies showed that the adsorption of indigo carmine fits well with the Langmuir model. The reuse of the composite nanofiber was also investigated in which more than 90% of indigo carmine was recovered in 5 min. The results of stability studies showed that the adsorption efficiency can remain almost constant (90%) after five consecutive adsorption/desorption cycles.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-233304 (URN)10.1039/c8ra02463d (DOI)000440243600055 ()2-s2.0-85049838997 (Scopus ID)
Funder
EU, FP7, Seventh Framework Programme
Note

QC 20180816

Available from: 2018-08-16 Created: 2018-08-16 Last updated: 2018-08-16Bibliographically approved
Mohamed, A., Yousef, S., Ali Abdelnaby, M., Osman, T. A., Hamawandi, B., Toprak, M. S., . . . Uheida, A. (2017). Photocatalytic degradation of organic dyes and enhanced mechanical properties of PAN/CNTs composite nanofibers. Separation and Purification Technology, 182, 219-223
Open this publication in new window or tab >>Photocatalytic degradation of organic dyes and enhanced mechanical properties of PAN/CNTs composite nanofibers
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2017 (English)In: Separation and Purification Technology, ISSN 1383-5866, E-ISSN 1873-3794, Vol. 182, p. 219-223Article in journal (Refereed) Published
Abstract [en]

This work describes the enhanced mechanical properties of the composite nanofibers and the photodegradation of two organic dyes using PAN/CNTs under UV irradiation at different volume concentration (0.05, 0.1, 0.2, and 0.3 wt.%). The composite nanofibers was performed with polyacrylonitrile (PAN), and carbon nanotubes (CNTs) by electrospinning process. The composite nanofibers structure and morphology is characterized by XRD, FTIR, SEM, and TEM. The result indicates that with increasing CNTs content, the mechanical properties of the composite nanofibers was enhanced, and became more elastic, and the elastic modulus increased drastically. The results of mechanical properties exhibit improvements in tensile strengths, and elastic modulus by 38% and 84% respectively, at only 0.05 wt.% CNTs. Moreover, photocatalytic degradation performance in short time and low power intensity was achieved comparison to earlier reports.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Composite nanofibers, Mechanical properties, Photodegradation, Carbon, Carbon nanotubes, Elastic moduli, Irradiation, Tensile strength, Yarn, Electrospinning process, Organic dye, Photo catalytic degradation, Polyacrylonitrile (PAN), Structure and morphology, UV irradiation, Volume concentration, Nanofibers
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-207443 (URN)10.1016/j.seppur.2017.03.051 (DOI)000401393700025 ()2-s2.0-85016937303 (Scopus ID)
Note

QC 20170523

Available from: 2017-05-23 Created: 2017-05-23 Last updated: 2017-06-14Bibliographically approved
Ashour, R. M., Abdelhamid, H. N., Abdel-Magied, A. F., Abdel-Khalek, A. A., Ali, M. M., Uheida, A., . . . Dutta, J. (2017). Rare Earth Ions Adsorption onto Graphene Oxide Nanosheets. Solvent extraction and ion exchange, 35(2), 91-103
Open this publication in new window or tab >>Rare Earth Ions Adsorption onto Graphene Oxide Nanosheets
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2017 (English)In: Solvent extraction and ion exchange, ISSN 0736-6299, E-ISSN 1532-2262, Vol. 35, no 2, p. 91-103Article in journal (Refereed) Published
Abstract [en]

Graphene oxide (GO) was synthesized and used as a coagulant of rare earth elements (REEs) from aqueous solution. Stability and adsorption capacities were exhibited for target REEs such as La(III), Nd(III), Gd(III), and Y(III). The parameters influencing the adsorption capacity of the target species including contact time, pH, initial concentration, and temperature were optimized. The adsorption kinetics and thermodynamics were studied. The method showed quantitative recovery (99%) upon desorption using HNO3 acid (0.1 M) after a short contact time (15 min).

Place, publisher, year, edition, pages
Taylor & Francis, 2017
Keywords
Adsorption, desorption, rare earth, graphene oxide
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-207923 (URN)10.1080/07366299.2017.1287509 (DOI)000400509800002 ()2-s2.0-85014556348 (Scopus ID)
Note

QC 20170529

Available from: 2017-05-29 Created: 2017-05-29 Last updated: 2017-05-29Bibliographically approved
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