AHMED M. HAMEED - Academia.edu (original) (raw)

Papers by AHMED M. HAMEED

Herein, a novel propafenone (PPF) carbon paste sensor fortified with copper oxide nanoparticles (... more Herein, a novel propafenone (PPF) carbon paste sensor fortified with copper oxide nanoparticles (CuONPs/CPEs) was constructed for sensitive differential voltammetric determination of PPF. At the CuONPs/CPEs surface, PPF molecule was irreversibly oxidized at with an anodic oxidation peak at 1.07 V following a diffusion reaction behavior accompanied by transferring two electrons and one proton. Molecular orbital calculations were estimated for the PPF molecule and its two main metabolites: 5-hydroxypropafenone (5OH-PPF) and N-depropylpropafenone (NOR-PPF), suggesting the oxidation of the amino group in the aliphatic side chain of the parent PPF molecule and its metabolites. Conditions for experimentation and instrumentation that impact the performance of the method under cyclic and differential pulse voltammetric conditions, such as amount of modifier, pH, and scan rate, were studied and optimized. According to the electrocatalytic activity of CuONPs, significant enhancement of the peak current was recorded with linear calibration curves covering the PPF concentration ranged from 5 to 745 ng mL −1 with the limit of detection reaching 1.87 ng mL −1. Next, the introduced CuONPs/CPEs sensors were tested for differential pulse voltammetric quantification of PFF in dosage form and biological fluids without any special preconcentration or pretreatment steps. The proposed sensor produced satisfactory results that were totally statistically relevant.

Molecules

A novel polyaniline-modified CNT and graphene-based nanocomposite (2.32–7.34 nm) was prepared and... more A novel polyaniline-modified CNT and graphene-based nanocomposite (2.32–7.34 nm) was prepared and characterized by spectroscopic methods. The specific surface area was 176 m2/g with 0.232 cm3/g as the specific pore volume. The nanocomposite was used to remove zinc and lead metal ions from water; showing a high removal capacity of 346 and 581 mg/g at pH 6.5. The data followed pseudo-second-order, intraparticle diffusion and Elovich models. Besides this, the experimental values obeyed Langmuir and Temkin isotherms. The results confirmed that the removal of lead and zinc ions occurred in a mixed mode, that is, diffusion absorption and ion exchange between the heterogeneous surface of the sorbent containing active adsorption centers and the solution containing metal ions. The enthalpy values were 149.9 and 158.6 J.mol−1K−1 for zinc and lead metal ions. The negative values of free energies were in the range of −4.97 to −26.3 kJ/mol. These values indicated an endothermic spontaneous remov...

Molecules

Tannery industries are one of the extensive industrial activities which are the major source of c... more Tannery industries are one of the extensive industrial activities which are the major source of chromium contamination in the environment. Chromium contamination has been an increasing threat to the environment and human health. Therefore, the removal of chromium ions is necessary to save human society. This study is oriented toward the preparation of a new triazole Schiff base derivatives for the remediation of chromium ions. 4,4′-((1E)-1,2-bis ((1H-1,2,4-triazol-3-yl) imino)ethane-1,2-diyl) diphenol was prepared by the interaction between 3-Amino-1H-1,2,4-triazole and 4,4′-Dihydroxybenzil. Then, the produced Schiff base underwent a phosphorylation reaction to produce the adsorbent (TIHP), which confirmed its structure via the different tools FTIR, TGA, 1HNMR, 13CNMR, GC-MS, and Phosphorus-31 nuclear magnetic resonance (31P-NMR). The newly synthesized adsorbent (TIHP) was used to remove chromium oxyanions (Cr(VI)) from an aqueous solution. The batch technique was used to test many ...

The Biological and Chemical Ameliorative Effects of Bread Substituted with Dried Moringa Leaves

Arabian Journal of Chemistry

Arabian Journal of Chemistry, 2021

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Journal of Molecular Structure, 2021

Investigation of three synthesized propane bis-oxoindoline derivatives as inhibitors for the corr... more Investigation of three synthesized propane bis-oxoindoline derivatives as inhibitors for the corrosion of mild steel in sulfuric acid solutions,

ACS Omega, 2021

Photochromic materials have attracted broad interest to enhance the anti-counterfeiting of commer... more Photochromic materials have attracted broad interest to enhance the anti-counterfeiting of commercial products. In order to develop anti-counterfeiting mechanically reliable composite materials, it is urgent to improve the engineering process of both the material and matrix. Herein, we report on the development of anti-counterfeiting mechanically reliable nanocomposites composed of rare-earth doped aluminate strontium oxide phosphor (RESA) nanoparticles (NPs) immobilized into the thermoplastic polyurethane-based nanofibrous film successfully fabricated via the simple solution blowing spinning technology. The generated photochromic film exhibits an ultraviolet-stimulated anti-counterfeiting property. Different films of different emissive properties were generated using different total contents of RESA. Transmission electron microscopy was utilized to investigate the morphological properties of RESA NPs to display a particle diameter of 3−17 nm. The morphologies, compositions, optical transmittance, and mechanical performance of the produced photochromic nanofibrous films were investigated. Several analytical methods were employed, including energy-dispersive X-ray spectroscopy, scanning electron microscopy, and Fourier-transform infrared spectrometry. The fibrous diameter of RESA-TPU was in the range of 200−250 nm. In order to ensure the development of transparent RESA-TPU film, RESA must be prepared in the nanosized form to allow better dispersion without agglomeration in the TPU matrix. The luminescent RESA-TPU film displayed an absorbance intensity at 367 nm and two emission intensities at 431 and 517 nm. The generated RESA-TPU films showed an enhanced hydrophobicity without negatively influencing their original appearance and mechanical properties. Upon irradiation with ultraviolet light, the transparent nanofibrous films displayed rapid and reversible photochromism to greenish-yellow without fatigue. The produced anti-counterfeiting films demonstrated stretchable, flexible, and translucent properties. As a simple sort of anti-counterfeiting substrates, the current novel photochromic film provides excellent anti-counterfeiting strength at low-cost as an efficient method to develop versatile materials with high mechanical strength to create an excellent market as well as adding economic and social values.

Arabian Journal of Chemistry, 2020

Doum fruit and pomegranate peels are riches healthy nutrients such as fiber, minerals and antioxi... more Doum fruit and pomegranate peels are riches healthy nutrients such as fiber, minerals and antioxidant potentially protect from diet related diseases. This research was conducted to study the influence of ice cream enriched with pomegranate peels powder (PPP) and Doum fruit syrup (DFS) alone or in a combination at different ratios on its physicochemical, rheological, microbiological, and organoleptic properties. Ice cream enriched with PPP and DFS have high contents of total solids, protein, fat, ash, fiber, antioxidants activity, minerals and gross energy which are raised up with increasing the addition level. However the contents of moisture, pH, carbohydrate and Cu were decreased. Furthermore, addition of PPP and DFS alone or in a combination caused increases in acidity, specific gravity, weight per gallon, first dripping time, melting rate, melting resistance, and viscosity. While, a decrease in overrun values was observed compared to the control sample. Treatment of ice cream with PPP and DFS alone or in a combination showed decrease in total bacterial and psychrophilic count. In addition coliform bacteria, yeasts and mould counts were not detectable in all ice cream samples. The sensory evaluation showed that ice cream enriched with 0. 25% PPP and 2.5% DFS was the most acceptable treatment. While higher addition levels of PPP and DFS alone or in a combination contributed to progressive loss of sensory quality.

Arabian Journal of Chemistry, 2021

Barley has widely known as an excellent source of dietary fiber. In this investigation, biscuits ... more Barley has widely known as an excellent source of dietary fiber. In this investigation, biscuits were prepared by substituting wheat flour (WF) with whole barley flour (WBF) at levels 20 and 40% as an attempt to improve the nutritional and functional quality of biscuits. Chemical, antioxidant, rheological, sensory and microbial properties were assessed. The blending with WBF, even at low ratio of inclusion (20%), caused an increase in protein, ash and crude fiber contents. The antioxidant activity was 41.5% in barley flour whereas it was only 2.03% in wheat flour, it was lowered to 1.35% in control biscuits and reached to the maximum 12.6% in biscuits prepared with 40% WBF. Water absorption, dough development and arrival time increased progressively with the elevation in WBF ratio. The lower level of WBF (20%) increased the stability of the dough. Extension, expansibility rheology and the dough energy were shortened with the increasing of WBF ratio. WBF-wheat biscuits up to the replacement ratio 40% possessed a high acceptance rating but the higher level (40%) resulted in lowering the surface color and appearance scores. The higher level (40%) incorporated into biscuits decreased the microbial load (Total bacterial, Spore-forming bacteria & Mold and yeast counts) during storage period.

Royal Society Open Science, 2020

The drug resistance of bacteria is a significant threat to human civilization while the action of... more The drug resistance of bacteria is a significant threat to human civilization while the action of antibiotics against drug-resistant bacteria is severely limited owing to the hydrophobic nature of drug molecules, which unquestionably inhibit its permanency for clinical applications. The antibacterial action of nanomaterials offers major modalities to combat drug resistance of bacteria. The current work reports the use of nano–metal-organic frameworks encapsulating drug molecules to enhance its antibacterial activity against model drug-resistant bacteria and biofilm of the bacteria. We have attached rifampicin (RF), a well-documented antituberculosis drug with tremendous pharmacological significance, into the pore surface of zeolitic imidazolate framework 8 (ZIF8) by a simple synthetic procedure. The synthesized ZIF8 has been characterized using the X-ray diffraction (XRD) method before and after drug encapsulation. The electron microscopic strategies such as scanning electron micros...

Arabian Journal of Chemistry, 2021

In this work, the analcime/dimethylglyoxime composite was facilely fabricated as a novel adsorben... more In this work, the analcime/dimethylglyoxime composite was facilely fabricated as a novel adsorbent for the removal of Ni(II) ions from aqueous solutions. The fabricated adsorbent was characterized utilizing FT-IR, XRD, FE-SEM, and CHN analyses. Wide XRD peak and cottonlike structure FE-SEM image of the adsorbent confirmed that the crystal assembly of analcime

ACS Omega, 2020

Chelation therapy is one of the most effective and widely accepted methods of treatment to reduce... more Chelation therapy is one of the most effective and widely accepted methods of treatment to reduce metal toxicity caused by an excess amount of essential metals. Essential minerals play an important role in maintaining healthy human physiology. However, the presence of an excess amount of such essential metals can cause cell injury, which finally leads to severe life-threatening diseases. Chelating complexes can efficiently capture the targeted metal and can easily be excreted from the body. Commonly utilized metal chelators have major side effects including long-term damage to some organs, which has pointed out the need of less harmful biocompatible chelating agents. In this work, we have investigated the iron chelating property of curcumin through various spectroscopic tools by synthesizing and characterizing the iron−curcumin (Fe−Cur) complex. We have also investigated whether the synthesized materials are able to retain their antioxidant activity after the chelation of a substantial amount of metal ion. Our study unravels the improved antioxidant activity of the synthesized chelate complex. We further demonstrate that the proposed complex generates no significant reactive oxygen species (ROS) under dark conditions, which makes it a promising candidate for chelation therapy of iron toxicity. Femtosecond-resolved fluorescence studies further provide insight into the mechanism of activity of the new complex where electron transfer from ligand to metal has been observed prominently. Thus, the Fe−Cur complex has a potential to act as a dual activity medicine for excretion of toxic metal ions via chelation and as a therapeutic agent of oxidative stress caused by the metal ion as well.

Journal of Inorganic and Organometallic Polymers and Materials, 2020

In this paper, analcime and zeolite X were fabricated using the hydrothermal method in the presen... more In this paper, analcime and zeolite X were fabricated using the hydrothermal method in the presence of L-alanine and glycine as organic structure-directing agents, respectively. The XRD confirmed that the average crystallite size of zeolite X and analcime products is 94.85 and 146.06 nm, respectively. Also, the FE-SEM confirmed that the zeolite X composed of an octahedron and cubic shapes with an average size of ca. 2.78 µm. Besides, the analcime composed of droxtal shapes with an average size of ca. 9.50 µm. Vibrations of adsorbed water, aluminol, silanol, Si-O-Si, and Si-O-Al groups were obtained using the FT-IR spectrophotometer. Moreover, the fabricated products were utilized for the removal of Cd(II) ions from aqueous media and wastewater which was collected from an electroplating factory in the 10th of Ramadan City, Egypt. The pseudo-second-order model and Langmuir isotherm were the best fittings for the experimental results. The removal of Cd(II) ions was exothermic because the values of ∆H o in the case of zeolite X and analcime were − 49.859 and-61.647 kJ/mol, respectively. Also, the removal of Cd(II) ions was spontaneous because the values of ΔG o in the case of zeolite X and analcime were − 101.678 and − 119.669 kJ/mol at 298 K, respectively. Besides, the maximum adsorption capacity of analcime and zeolite X was 139.278 and 62.814 mg/g, respectively. Moreover, the fabricated samples are reusable, effective, stable, and can be utilized over and over without surrendering their efficiency towards Cd(II) ions in aqueous solutions and wastewater.

Arabian Journal of Chemistry, 2020

Green-synthesis and characterization for new Schiff-base complexes; spectroscopy, conductometry, ... more Green-synthesis and characterization for new Schiff-base complexes; spectroscopy, conductometry, Hirshfeld properties and biological assay enhanced by in-silico study, Arabian

Arabian Journal of Chemistry, 2020

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

International Journal of Environmental Analytical Chemistry, 2020

An environmentally friendly, sensitive, easy and fast ultrasoundassisted ionic liquid-based dispe... more An environmentally friendly, sensitive, easy and fast ultrasoundassisted ionic liquid-based dispersive liquid-liquid microextraction technique (UA-IL-DLLME) was developed to preconcentrate trace quantities of nickel Ni(II) ion in water, food and tobacco samples prior to detection by FAAS. The proposed technique based on utilisationthe of ionic liquid (IL) (1-hexyl-3-methylimidazolium tris-(pentafluoroethyl)trifluorophosphate [HMIM][FAP]) as an extraction solvent for Ni(II) ions after the complexation with quinalizarin (Quinz) at pH 6.0. The impact of different analytical parameters on the microextraction efficiency was investigated. In the range of 2.0-300 µg L −1 , the calibration graph was linear. Limit of detection and preconcentration factor were 0.6 µg L −1 and 100. Relative standard deviation (RSD%) as precision at 50 and 100 µg L −1 of Ni(II) were 2.4% and 3.6%, respectively (n = 10). The validation of the proposed procedure was verified by a test of two certified reference materials (TMDA-51.3 fortified water, TMDA-53.3 fortified water and SRM spinach leaves 1570A) applying the standard addition method. Finally, the proposed UA-IL-DLLME method was developed and applied to preconcentrate and determine of trace quantities of Ni(II) in real water, food and tobacco samples with satisfactory results.

Journal of Materials Research and Technology, 2019

In the current paper, Egyptian insecticide cans were utilized as an iron source. Also, malic, tar... more In the current paper, Egyptian insecticide cans were utilized as an iron source. Also, malic, tartaric, citric, and succinic acids were utilized as organic fuels for the combustion fabrication of hematite nanoparticles which were named HM, HT, HC, and HS, respectively. X-ray diffraction (XRD) proved that the crystallite size of the HM, HT, HC, and HS products was 63.52, 69.38, 71.91, and 65.13 nm, respectively. High-resolution transmission electron microscopy (HR-TEM) demonstrated that irregular and spherical shapes have an average diameter of 60.60, 70.21, and 68.80 nm were noticed in the HM, HT, and HS products, respectively. Besides, hexagonal shapes have an average diameter of 73.41 nm were noticed in the HC product. As well as, the thermal analysis demonstrated that the total weight loss per

ChemMedChem, 2019

Supporting information for this article is given via a link at the end of the document.

Molecules

The presence of triclosan in water is toxic to human beings, hazardous to the environment and cre... more The presence of triclosan in water is toxic to human beings, hazardous to the environment and creates side effects and problems because this is an endocrine-disturbing water pollutant. Therefore, there is a great need for the separation of this notorious water pollutant at an effective, economic and eco-friendly level. The interface sorption was achieved on synthesized ionic liquid-based nanocomposites. An N-methyl butyl imidazolium bromide ionic liquid copper oxide nanocomposite was prepared using green methods and characterized by using proper spectroscopic methods. The nanocomposite was used to remove triclosan in water with the best conditions of time 30 min, concentration 100 µg/L, pH 8.0, dose 1.0 g/L and temperature 25 °C, with 90.2 µg/g removal capacity. The results obeyed Langmuir, Temkin and D-Rs isotherms with a first-order kinetic and liquid-film-diffusion kinetic model. The positive entropy value was 0.47 kJ/mol K, while the negative value of enthalpy was −0.11 kJ/mol. ...

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Herein, a novel propafenone (PPF) carbon paste sensor fortified with copper oxide nanoparticles (... more Herein, a novel propafenone (PPF) carbon paste sensor fortified with copper oxide nanoparticles (CuONPs/CPEs) was constructed for sensitive differential voltammetric determination of PPF. At the CuONPs/CPEs surface, PPF molecule was irreversibly oxidized at with an anodic oxidation peak at 1.07 V following a diffusion reaction behavior accompanied by transferring two electrons and one proton. Molecular orbital calculations were estimated for the PPF molecule and its two main metabolites: 5-hydroxypropafenone (5OH-PPF) and N-depropylpropafenone (NOR-PPF), suggesting the oxidation of the amino group in the aliphatic side chain of the parent PPF molecule and its metabolites. Conditions for experimentation and instrumentation that impact the performance of the method under cyclic and differential pulse voltammetric conditions, such as amount of modifier, pH, and scan rate, were studied and optimized. According to the electrocatalytic activity of CuONPs, significant enhancement of the peak current was recorded with linear calibration curves covering the PPF concentration ranged from 5 to 745 ng mL −1 with the limit of detection reaching 1.87 ng mL −1. Next, the introduced CuONPs/CPEs sensors were tested for differential pulse voltammetric quantification of PFF in dosage form and biological fluids without any special preconcentration or pretreatment steps. The proposed sensor produced satisfactory results that were totally statistically relevant.

Molecules

A novel polyaniline-modified CNT and graphene-based nanocomposite (2.32–7.34 nm) was prepared and... more A novel polyaniline-modified CNT and graphene-based nanocomposite (2.32–7.34 nm) was prepared and characterized by spectroscopic methods. The specific surface area was 176 m2/g with 0.232 cm3/g as the specific pore volume. The nanocomposite was used to remove zinc and lead metal ions from water; showing a high removal capacity of 346 and 581 mg/g at pH 6.5. The data followed pseudo-second-order, intraparticle diffusion and Elovich models. Besides this, the experimental values obeyed Langmuir and Temkin isotherms. The results confirmed that the removal of lead and zinc ions occurred in a mixed mode, that is, diffusion absorption and ion exchange between the heterogeneous surface of the sorbent containing active adsorption centers and the solution containing metal ions. The enthalpy values were 149.9 and 158.6 J.mol−1K−1 for zinc and lead metal ions. The negative values of free energies were in the range of −4.97 to −26.3 kJ/mol. These values indicated an endothermic spontaneous remov...

Molecules

Tannery industries are one of the extensive industrial activities which are the major source of c... more Tannery industries are one of the extensive industrial activities which are the major source of chromium contamination in the environment. Chromium contamination has been an increasing threat to the environment and human health. Therefore, the removal of chromium ions is necessary to save human society. This study is oriented toward the preparation of a new triazole Schiff base derivatives for the remediation of chromium ions. 4,4′-((1E)-1,2-bis ((1H-1,2,4-triazol-3-yl) imino)ethane-1,2-diyl) diphenol was prepared by the interaction between 3-Amino-1H-1,2,4-triazole and 4,4′-Dihydroxybenzil. Then, the produced Schiff base underwent a phosphorylation reaction to produce the adsorbent (TIHP), which confirmed its structure via the different tools FTIR, TGA, 1HNMR, 13CNMR, GC-MS, and Phosphorus-31 nuclear magnetic resonance (31P-NMR). The newly synthesized adsorbent (TIHP) was used to remove chromium oxyanions (Cr(VI)) from an aqueous solution. The batch technique was used to test many ...

The Biological and Chemical Ameliorative Effects of Bread Substituted with Dried Moringa Leaves

Arabian Journal of Chemistry

Arabian Journal of Chemistry, 2021

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Journal of Molecular Structure, 2021

Investigation of three synthesized propane bis-oxoindoline derivatives as inhibitors for the corr... more Investigation of three synthesized propane bis-oxoindoline derivatives as inhibitors for the corrosion of mild steel in sulfuric acid solutions,

ACS Omega, 2021

Photochromic materials have attracted broad interest to enhance the anti-counterfeiting of commer... more Photochromic materials have attracted broad interest to enhance the anti-counterfeiting of commercial products. In order to develop anti-counterfeiting mechanically reliable composite materials, it is urgent to improve the engineering process of both the material and matrix. Herein, we report on the development of anti-counterfeiting mechanically reliable nanocomposites composed of rare-earth doped aluminate strontium oxide phosphor (RESA) nanoparticles (NPs) immobilized into the thermoplastic polyurethane-based nanofibrous film successfully fabricated via the simple solution blowing spinning technology. The generated photochromic film exhibits an ultraviolet-stimulated anti-counterfeiting property. Different films of different emissive properties were generated using different total contents of RESA. Transmission electron microscopy was utilized to investigate the morphological properties of RESA NPs to display a particle diameter of 3−17 nm. The morphologies, compositions, optical transmittance, and mechanical performance of the produced photochromic nanofibrous films were investigated. Several analytical methods were employed, including energy-dispersive X-ray spectroscopy, scanning electron microscopy, and Fourier-transform infrared spectrometry. The fibrous diameter of RESA-TPU was in the range of 200−250 nm. In order to ensure the development of transparent RESA-TPU film, RESA must be prepared in the nanosized form to allow better dispersion without agglomeration in the TPU matrix. The luminescent RESA-TPU film displayed an absorbance intensity at 367 nm and two emission intensities at 431 and 517 nm. The generated RESA-TPU films showed an enhanced hydrophobicity without negatively influencing their original appearance and mechanical properties. Upon irradiation with ultraviolet light, the transparent nanofibrous films displayed rapid and reversible photochromism to greenish-yellow without fatigue. The produced anti-counterfeiting films demonstrated stretchable, flexible, and translucent properties. As a simple sort of anti-counterfeiting substrates, the current novel photochromic film provides excellent anti-counterfeiting strength at low-cost as an efficient method to develop versatile materials with high mechanical strength to create an excellent market as well as adding economic and social values.

Arabian Journal of Chemistry, 2020

Doum fruit and pomegranate peels are riches healthy nutrients such as fiber, minerals and antioxi... more Doum fruit and pomegranate peels are riches healthy nutrients such as fiber, minerals and antioxidant potentially protect from diet related diseases. This research was conducted to study the influence of ice cream enriched with pomegranate peels powder (PPP) and Doum fruit syrup (DFS) alone or in a combination at different ratios on its physicochemical, rheological, microbiological, and organoleptic properties. Ice cream enriched with PPP and DFS have high contents of total solids, protein, fat, ash, fiber, antioxidants activity, minerals and gross energy which are raised up with increasing the addition level. However the contents of moisture, pH, carbohydrate and Cu were decreased. Furthermore, addition of PPP and DFS alone or in a combination caused increases in acidity, specific gravity, weight per gallon, first dripping time, melting rate, melting resistance, and viscosity. While, a decrease in overrun values was observed compared to the control sample. Treatment of ice cream with PPP and DFS alone or in a combination showed decrease in total bacterial and psychrophilic count. In addition coliform bacteria, yeasts and mould counts were not detectable in all ice cream samples. The sensory evaluation showed that ice cream enriched with 0. 25% PPP and 2.5% DFS was the most acceptable treatment. While higher addition levels of PPP and DFS alone or in a combination contributed to progressive loss of sensory quality.

Arabian Journal of Chemistry, 2021

Barley has widely known as an excellent source of dietary fiber. In this investigation, biscuits ... more Barley has widely known as an excellent source of dietary fiber. In this investigation, biscuits were prepared by substituting wheat flour (WF) with whole barley flour (WBF) at levels 20 and 40% as an attempt to improve the nutritional and functional quality of biscuits. Chemical, antioxidant, rheological, sensory and microbial properties were assessed. The blending with WBF, even at low ratio of inclusion (20%), caused an increase in protein, ash and crude fiber contents. The antioxidant activity was 41.5% in barley flour whereas it was only 2.03% in wheat flour, it was lowered to 1.35% in control biscuits and reached to the maximum 12.6% in biscuits prepared with 40% WBF. Water absorption, dough development and arrival time increased progressively with the elevation in WBF ratio. The lower level of WBF (20%) increased the stability of the dough. Extension, expansibility rheology and the dough energy were shortened with the increasing of WBF ratio. WBF-wheat biscuits up to the replacement ratio 40% possessed a high acceptance rating but the higher level (40%) resulted in lowering the surface color and appearance scores. The higher level (40%) incorporated into biscuits decreased the microbial load (Total bacterial, Spore-forming bacteria & Mold and yeast counts) during storage period.

Royal Society Open Science, 2020

The drug resistance of bacteria is a significant threat to human civilization while the action of... more The drug resistance of bacteria is a significant threat to human civilization while the action of antibiotics against drug-resistant bacteria is severely limited owing to the hydrophobic nature of drug molecules, which unquestionably inhibit its permanency for clinical applications. The antibacterial action of nanomaterials offers major modalities to combat drug resistance of bacteria. The current work reports the use of nano–metal-organic frameworks encapsulating drug molecules to enhance its antibacterial activity against model drug-resistant bacteria and biofilm of the bacteria. We have attached rifampicin (RF), a well-documented antituberculosis drug with tremendous pharmacological significance, into the pore surface of zeolitic imidazolate framework 8 (ZIF8) by a simple synthetic procedure. The synthesized ZIF8 has been characterized using the X-ray diffraction (XRD) method before and after drug encapsulation. The electron microscopic strategies such as scanning electron micros...

Arabian Journal of Chemistry, 2021

In this work, the analcime/dimethylglyoxime composite was facilely fabricated as a novel adsorben... more In this work, the analcime/dimethylglyoxime composite was facilely fabricated as a novel adsorbent for the removal of Ni(II) ions from aqueous solutions. The fabricated adsorbent was characterized utilizing FT-IR, XRD, FE-SEM, and CHN analyses. Wide XRD peak and cottonlike structure FE-SEM image of the adsorbent confirmed that the crystal assembly of analcime

ACS Omega, 2020

Chelation therapy is one of the most effective and widely accepted methods of treatment to reduce... more Chelation therapy is one of the most effective and widely accepted methods of treatment to reduce metal toxicity caused by an excess amount of essential metals. Essential minerals play an important role in maintaining healthy human physiology. However, the presence of an excess amount of such essential metals can cause cell injury, which finally leads to severe life-threatening diseases. Chelating complexes can efficiently capture the targeted metal and can easily be excreted from the body. Commonly utilized metal chelators have major side effects including long-term damage to some organs, which has pointed out the need of less harmful biocompatible chelating agents. In this work, we have investigated the iron chelating property of curcumin through various spectroscopic tools by synthesizing and characterizing the iron−curcumin (Fe−Cur) complex. We have also investigated whether the synthesized materials are able to retain their antioxidant activity after the chelation of a substantial amount of metal ion. Our study unravels the improved antioxidant activity of the synthesized chelate complex. We further demonstrate that the proposed complex generates no significant reactive oxygen species (ROS) under dark conditions, which makes it a promising candidate for chelation therapy of iron toxicity. Femtosecond-resolved fluorescence studies further provide insight into the mechanism of activity of the new complex where electron transfer from ligand to metal has been observed prominently. Thus, the Fe−Cur complex has a potential to act as a dual activity medicine for excretion of toxic metal ions via chelation and as a therapeutic agent of oxidative stress caused by the metal ion as well.

Journal of Inorganic and Organometallic Polymers and Materials, 2020

In this paper, analcime and zeolite X were fabricated using the hydrothermal method in the presen... more In this paper, analcime and zeolite X were fabricated using the hydrothermal method in the presence of L-alanine and glycine as organic structure-directing agents, respectively. The XRD confirmed that the average crystallite size of zeolite X and analcime products is 94.85 and 146.06 nm, respectively. Also, the FE-SEM confirmed that the zeolite X composed of an octahedron and cubic shapes with an average size of ca. 2.78 µm. Besides, the analcime composed of droxtal shapes with an average size of ca. 9.50 µm. Vibrations of adsorbed water, aluminol, silanol, Si-O-Si, and Si-O-Al groups were obtained using the FT-IR spectrophotometer. Moreover, the fabricated products were utilized for the removal of Cd(II) ions from aqueous media and wastewater which was collected from an electroplating factory in the 10th of Ramadan City, Egypt. The pseudo-second-order model and Langmuir isotherm were the best fittings for the experimental results. The removal of Cd(II) ions was exothermic because the values of ∆H o in the case of zeolite X and analcime were − 49.859 and-61.647 kJ/mol, respectively. Also, the removal of Cd(II) ions was spontaneous because the values of ΔG o in the case of zeolite X and analcime were − 101.678 and − 119.669 kJ/mol at 298 K, respectively. Besides, the maximum adsorption capacity of analcime and zeolite X was 139.278 and 62.814 mg/g, respectively. Moreover, the fabricated samples are reusable, effective, stable, and can be utilized over and over without surrendering their efficiency towards Cd(II) ions in aqueous solutions and wastewater.

Arabian Journal of Chemistry, 2020

Green-synthesis and characterization for new Schiff-base complexes; spectroscopy, conductometry, ... more Green-synthesis and characterization for new Schiff-base complexes; spectroscopy, conductometry, Hirshfeld properties and biological assay enhanced by in-silico study, Arabian

Arabian Journal of Chemistry, 2020

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

International Journal of Environmental Analytical Chemistry, 2020

An environmentally friendly, sensitive, easy and fast ultrasoundassisted ionic liquid-based dispe... more An environmentally friendly, sensitive, easy and fast ultrasoundassisted ionic liquid-based dispersive liquid-liquid microextraction technique (UA-IL-DLLME) was developed to preconcentrate trace quantities of nickel Ni(II) ion in water, food and tobacco samples prior to detection by FAAS. The proposed technique based on utilisationthe of ionic liquid (IL) (1-hexyl-3-methylimidazolium tris-(pentafluoroethyl)trifluorophosphate [HMIM][FAP]) as an extraction solvent for Ni(II) ions after the complexation with quinalizarin (Quinz) at pH 6.0. The impact of different analytical parameters on the microextraction efficiency was investigated. In the range of 2.0-300 µg L −1 , the calibration graph was linear. Limit of detection and preconcentration factor were 0.6 µg L −1 and 100. Relative standard deviation (RSD%) as precision at 50 and 100 µg L −1 of Ni(II) were 2.4% and 3.6%, respectively (n = 10). The validation of the proposed procedure was verified by a test of two certified reference materials (TMDA-51.3 fortified water, TMDA-53.3 fortified water and SRM spinach leaves 1570A) applying the standard addition method. Finally, the proposed UA-IL-DLLME method was developed and applied to preconcentrate and determine of trace quantities of Ni(II) in real water, food and tobacco samples with satisfactory results.

Journal of Materials Research and Technology, 2019

In the current paper, Egyptian insecticide cans were utilized as an iron source. Also, malic, tar... more In the current paper, Egyptian insecticide cans were utilized as an iron source. Also, malic, tartaric, citric, and succinic acids were utilized as organic fuels for the combustion fabrication of hematite nanoparticles which were named HM, HT, HC, and HS, respectively. X-ray diffraction (XRD) proved that the crystallite size of the HM, HT, HC, and HS products was 63.52, 69.38, 71.91, and 65.13 nm, respectively. High-resolution transmission electron microscopy (HR-TEM) demonstrated that irregular and spherical shapes have an average diameter of 60.60, 70.21, and 68.80 nm were noticed in the HM, HT, and HS products, respectively. Besides, hexagonal shapes have an average diameter of 73.41 nm were noticed in the HC product. As well as, the thermal analysis demonstrated that the total weight loss per

ChemMedChem, 2019

Supporting information for this article is given via a link at the end of the document.

Molecules

The presence of triclosan in water is toxic to human beings, hazardous to the environment and cre... more The presence of triclosan in water is toxic to human beings, hazardous to the environment and creates side effects and problems because this is an endocrine-disturbing water pollutant. Therefore, there is a great need for the separation of this notorious water pollutant at an effective, economic and eco-friendly level. The interface sorption was achieved on synthesized ionic liquid-based nanocomposites. An N-methyl butyl imidazolium bromide ionic liquid copper oxide nanocomposite was prepared using green methods and characterized by using proper spectroscopic methods. The nanocomposite was used to remove triclosan in water with the best conditions of time 30 min, concentration 100 µg/L, pH 8.0, dose 1.0 g/L and temperature 25 °C, with 90.2 µg/g removal capacity. The results obeyed Langmuir, Temkin and D-Rs isotherms with a first-order kinetic and liquid-film-diffusion kinetic model. The positive entropy value was 0.47 kJ/mol K, while the negative value of enthalpy was −0.11 kJ/mol. ...

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY