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Ultra Sensitive Determination and Preconcentration of Cd2+, Cu2+and Pb2+after Multi-Walled Carbon Nanotubes Adsorption

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Journal of Analytical Sciences, Methods and Instrumentation 2013年第1期3卷 8-12页

作者： Ashraf Mohamed Abdel-Lateef ramadan Abdel-Wahed Mohamed Hazem Hassan mahmoud Central Laboratory for Elemental and Isotopic Analysis Nuclear Research Center Atomic Energy Authority Cairo Egypt Central Laboratory for Elemental and Isotopic Analysis Nuclear Research Center Atomic Energy Authority Cairo Egypt Chemistry Department Faculty of Science Jazan University Jazan KSA Central Laboratory for Elemental and Isotopic Analysis Nuclear Research Center Atomic Energy Authority Cairo Egypt Physics Department Faculty of Science and Human Studies Shaqra University Shaqra KSA

Multi-Walled carbon nanotubes are used as preconcentrating probes for the quantitative determination of trace cadmium, copper and lead in environmental and biological sample using graphite Furnace Atomic Absorption Spectrometry and inductively coupled Plasma Optical Emission spectrometry. The method is based on the electrostatic interactions of positively charged Cd+, Cu+ and Pb+ with the negatively charged multi-walled carbon nanotubes (MWCNTs) for the preconcentration and isolation of analytes from sample solutions. Effective preconcentration of trace cadmium, copper and lead was achieved in a pH range of 5 - 7, 5 - 7 and 4 - 7, respectively. The retained cadmium, copper and lead were efficiently eluted with 0.3 mol·L-1 HCl for graphite Furnace Atomic Absorption Spectrometry determination. The multi-walled carbon nanotubes packed micro-column exhibited fairly fast kinetics for the adsorption of cadmium, copper and lead, permitting the use of high sample flow rates up to at least 3 mL·min-1 for the flow injection on micro-column preconcentration without the loss of the retention efficiency. The detection limits (3σ) were 0.03, 0.01 and 0.5 ng·mL-1 for Cd, Cu and Pb, respectively. The relative standard deviation under optimum condition is less than 2.9% (n = 10). The developed method was successfully applied to the determination of trace Cd, Cu and Pb in a variety of environmental and biological samples.

关键词： Multi-Walled Carbon Nanotubes Graphite Furnace Atomic Absorption Spectrometry Inductively Coupled Plasma Optical Emission Spectrometry

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Two cases of variant late infantile ceroid lipofuscinosis in Jordan

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World Journal of Clinical Cases 2019年第2期7卷 203-208页

作者： Omar Nafi Bashar ramadan Olaf Riess Rebecca Buchert Tawfiq Froukh Department of Pediatrics Faculty of Medicine Mutah University Institute of Medical Genetics and Applied Genomics Rare Disease Center University of Tübingen Department of Biotechnology and Genetic Engineering Philadelphia University

BACKGROUND Late infantile ceroid lipofuscinosis is a rare neurodegenerative disorder that appears between the ages of 2 and 4 years and is difficult to diagnose. In this report we present two sisters with this condition, and the clinical course consisted of delayed developmental skills initially and later regression of previously acquired skills. The cases were initially considered as childhood disintegrative disorder(CDD); however, when whole exome sequencing(WES) genetic testing was done, they proved to be variant late infantile ceroid lipofuscinosis. This is the first report from *** SUMMARY Clinical presentation included developmental delay and initially speech delay,followed by lose of sphincter control. Motor development was normal until 4 years of age, then they developed ataxia(fear of going downstairs) and weakness while walking. Atonic and myoclonic seizures become intractable, and this was followed by inability to stand or sit and loss of expressive language. In addition to complete blood count test, liver function test, kidney function test, serum electrolyte test, and blood sugar test, serum amino acid profile, B12 level test,thyroid function test, and a brain computed tomography scan were also *** electroencephalogram showed a generalized spike and wave pattern, and magnetic resonance imaging showed little to no abnormalities. After dealing with the cases as CDD, WES testing proved a final diagnosis of variant late infantile ceroid lipofuscinosis. Current treatment is anti-epileptic drugs and supportive care at home, and they are now in vegetative *** This report highlights the importance of WES for the identification of genetic diseases, especially neurodegenerative disorders.

关键词： Ceroid lipofuscinosis Childhood disintegrative disorder Lysosomal storage disorders Neurodegenerative disorders Variant late infantile Case report

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Allolobophora caliginosa coelomic fluid ameliorates gentamicin-induced hepatorenal toxicity in rats

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Asian Pacific Journal of Tropical Biomedicine 2020年第9期10卷 411-416页

作者： Saad Bin Dajem Sara Bayoumi Ali Omar Ghanem Abdelrady Nouraldin mahmoud Salahaldin Ahmed Muhammed Soliman Yasmin Mohamed Kamal Ammar Yasser Abdelazim Aya Fadi Mohamed Kareem Morsy Ayman Saber Mohamed Sohair ramadan Fahmy Department of Biology College of ScienceKing Khalid UniversityAbhaSaudi Arabia Department of Zoology Faculty of ScienceCairo UniversityCairoEgypt

Objective:To explore the efficacy of earthworm’s coelomic fluid against gentamicin-induced hepatic and renal toxicity in ***:The animals were divided randomly into three groups(n=6 per group):control,gentamicin,and Allolobophora caliginosa coelomic fluid-treated *** was established after injection of gentamicin daily for 8 days at a dose of 100 mg/*** aminotransferase,alanine aminotransferase,alkaline phosphatase,total proteins,albumin,creatinine,urea,uric acid,malondialdehyde,glutathione,catalase and histopathology of tissues were investigated in the ***:Allolobophora caliginosa coelomic fluid significantly decreased urea,creatinine,uric acid,alanine aminotransferase,aspartate aminotransferase,alkaline phosphatase,and malondialdehyde levels while significantly increasing levels of total proteins,albumin,glutathione and *** histopathological investigation showed partial restoration of renal and hepatic ***:This study shows the potency of Allolobophora caliginosa coelomic fluid in improving the biochemical and histopathological changes induced by gentamicin in the liver and kidney of the rats.

关键词： Allolobophora caliginosa Coelomic fluid Gentamicin Hepatorenal toxicity Earthworm

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Permutation-substitution image encryption scheme based on a modified chaotic map in transform domain

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Journal of Central South University 2017年第9期24卷 2049-2057页

作者： ramadan Noha Ahmed HossamEldin H El-khamy Said E Abd El-Samie Fathi E Faculty of Electronic Engineering Menofia University Faculty of Engineering Alexandria University

A new chaotic image encryption scheme based on permutation and substitution in the Fourier domain is *** Fourier Transform(FRFT)is used before the encryption scheme to get a large degree of *** permutation is achieved by Baker map and the substitution by a key-related-to-plain-image algorithm based on the modified Logistic *** of the Logistic map is developed to increase the space of the encryption key,and hence increase the *** key of the encryption algorithm dependents on the plain image,and thus,the cipher image is sensitive to both the initial key and the plain image to resist known-plaintext and chosen plaintext *** key space is large and hence the algorithm can effectively resist brute-force *** proposed scheme is examined using different performance evaluation metrics and the results prove that the proposed scheme is highly secure,and it can effectively resist different attacks.

关键词： Backer map chaotic encryption fractional Fourier transform (FRFT) modified Logistic map

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FINITE GROUPS WHOSE MINIMAL SUBGROUPS ARE WEAKLY H-SUBGROUPS

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Acta Mathematica Scientia 2012年第6期32卷 2295-2301页

作者： M.M.Al-Mosa Al-Shomrani M.ramadan A.A.Heliel Department of Mathematics Faculty of Science 80203King Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics Faculty of ScienceCairo UniversityGiza 12613Egypt Department of Mathematics Beni-Suef UniversityFaculty of Science 62511Beni-SuefEgypt

Let G be a finite group. A subgroup H of G is called an H-subgroup in G if NG（H）∩ H^g ≤ H for all g C G. A subgroup H of G is called a weakly H-subgroup in G if there exists a normal subgroup K of G such that G = HK and H N K is an H-subgroup in G. In this paper, we investigate the structure of the finite group G under the assumption that every subgroup of G of prime order or of order 4 is a weakly H-subgroup in G. Our results improve and generalize several recent results in the literature.

关键词： c-normal subgroup H-subgroup p-nilpotent group supersolvable group generalized Fitting subgroupi saturated formation

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DNA Barcoding of Common Commercial Sea Catfish (Genus: Plicofollis) from Kuwait

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American Journal of Molecular Biology 2018年第2期8卷 102-108页

作者： Bahia Al-Zafiri mahmoud Magdy ramadan Ahmed Mohamed Ali Mohamed Abdel-Salam Rashed Animal Department Collage of Women Ain Shams University Cairo Egypt Genetics Department Faculty of Agriculture Ain Shams University Cairo Egypt

Kuwait fish market is one of the richest markets of native marine fish species. Sea catfishes are not very important in economic point of view, and only few of them (four species) are present and mistakenly, they all named (Chem). Using DNA barcode technique, the common sea catfish present in the East major fish market (Sharq) was analyzed. Based on the most common species ID databases (Barcoding of life database, BOLD and NCBI database), the most proposal identification that is compatible with major survey in 1997, the sea catfish is Plicofollis tenuispinis, the thin-spin sea catfish with similarity 100% and phylogenetic support of 78% bootstrap value. This is the first application of DNA barcode technique to thin-spine sea catfish of Kuwait.

关键词： DNA Barcoding Commercial Fish Species Sea Catfish Kuwait

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Spectral collocation method for solving continuous population models for single and interacting species by means of exponential Chebyshev approximation

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International Journal of Biomathematics 2018年第8期11卷 265-288页

作者： M. A. ramadan M. A. Abd El Salam Mathematics Department Faculty of Science Menoufia University Shebin El-KomEgypt Mathematics Department Faculty of Science Al-Azhar University Nasr-City Cairo Egypt

In this paper, an efficient and accurate method is presented to solve continuous population models for single and interacting species using spectral collocation method with exponential Chebyshev (EC) functions. The first problem is a logistic growth model in a population, while the second problem is a prey-predator model: Lotka-Volterra system, the tbird is a simple 2-species Lotka-Volterra competition model, and the final one is a prey-predator model with limit cycle periodic behavior. The high accuracy of this method is verified through some numerical examples. The obtained numerical results are compared with other methods, showing that the proposed method gives higher accuracy.

关键词： Exponential Chebyshev functions continuous population models spectral collocation method

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Improvement of the shelf life of grey mullet (Mugil cephalus) fish steaks using edible coatings containing chitosan, nanochitosan, and clove oil during refrigerated storage

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Food Production, Processing and Nutrition 2022年第1期4卷 351-364页

作者： Samar Aref ramadan Habiba Noha Morsy Mohamed Abdel-Daim Fatma Zayet Department of Food Technology Faculty of AgricultureSuez Canal Univer-sityIsmailiaEgypt Department of Food Technology(Home Economics) Faculty of AgricultureSuez Canal UniversityIsmailiaEgypt Department of Pharmacology Faculty of Veterinary MedicineSuez Canal UniversityIsmailiaEgypt

The effects of edible coatings made of chitosan, or chitosan nanoparticles, and their combinations with clove oil on the physical, chemical, microbiological, and sensory properties of grey mullet (Mugil cephalus) steaks during refriger-ated storage (4 °C) for 24 days were evaluated. The data indicated that metrics for all of these characteristics were improved significantly (P ≤ 0.05) in coated fish steak samples compared to the control sample. The coated steaks texture values were higher than those of control sample through storage time with nanochitosan coating containing clove oil having best value 2.51 kg/cm2 among tested samples at the end of storage period. However, pH values of coated samples were lower, a good indicator, than corresponding one of the control (6.46) with nanochitosan coatings with or without clove oil showed low mean values (6.11-6.13). Similar trend regarding chemical indices, i.e. total volatile basic-nitrogen, trimethylamine, peroxide, and thiobarbituric acid reactive substances values for samples coated with nanochitosan with or without clove oil giving better lower values than control or other treatments. Also, the coating delayed microbial (aerobic plate count, psychrotrophic bacteria, yeasts and molds, and total coliform bacteria) growth during the refrigeration storage period, and coated samples produced better results compared to the control sample. Sensory evaluations showed that the treatment enhanced the scores of fish steak samples compared to the control. The results showed that a nanochitosan coating with clove oil was the best treatment prolonged the shelf life of mullet steaks and efficiently maintained the quality attributes to an acceptable level during refrigerated storage for 24 days. Thus, these findings can be bases for producer to provide consumers with fresh fish steaks with good shelf life at refrigerated temperature for up to 24 days.

关键词： Edible coating Chitosan Nanochitosan Clove oil Grey mullet fish Storage

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ANFIS-based Sensor Fusion System of Sit-to-stand for Elderly People Assistive Device Protocols

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International Journal of Automation and computing 2013年第5期10卷 405-413页

作者： Omar Salah Ahmed A.ramadan Salvatore Sessa Ahmed Abo Ismail Makasatsu Fujie Atsuo Takanishi Egypt-Japan University of Science and Technology New Borg-El-Arab City Faculty of Engineering Tanta University Faculty of Science and Engineering Waseda University

This paper describes the analysis and design of an assistive device for elderly people under development at the EgyptJapan University of Science and Technology（E-JUST） named E-JUST assistive device（EJAD）.Several experiments were carried out using a motion capture system（VICON） and inertial sensors to identify the human posture during the sit-to-stand *** EJAD uses only two inertial measurement units（IMUs） fused through an adaptive neuro-fuzzy inference systems（ANFIS） algorithm to imitate the real motion of the *** EJAD consists of two main parts,a robot arm and an active *** robot arm is a 2-degree-of-freedom（2-DOF） planar *** addition,a back support with a passive joint is used to support the patient s *** IMUs on the leg and trunk of the patient are used to compensate for and adapt to the EJAD system motion depending on the obtained patient *** ANFIS algorithm is used to train the fuzzy system that converts the IMUs signals to the right posture of the patient.A control scheme is proposed to control the system motion based on practical measurements taken from the experiments.A computer simulation showed a relatively good performance of the EJAD in assisting the patient.

关键词： Adaptive neuro-fuzzy inference systems(ANFIS) sensor fusion assistive technologies sit-to-stand motion analysis inertial measurement units

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Gut virome:New key players in the pathogenesis of inflammatory bowel disease

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World Journal of Methodology 2025年第2期15卷 27-43页

作者： Helal F Hetta Rehab Ahmed Yasmin N ramadan Hayam Fathy Mohammed Khorshid Mohamed M Mabrouk Mai Hashem Department of Medical Microbiology and Immunology Faculty of MedicineAssiut UniversityAssiut 71515Egypt Division of Microbiology Immunology and BiotechnologyFaculty of pharmacyUniversity of TabukTabuk 71491Saudi Arabia Division of Microbiology Immunology and BiotechnologyDepartment of Natural Products and Alternative MedicineFaculty of PharmacyUniversity of TabukTabuk 71491Saudi Arabia Department of Internal Medicine Division HepatogastroenterologyAssiut UniversityAssiut 71515Egypt Department of Clinical Research Egyptian Developers of Gastroenterology and Endoscopy FoundationCairo 11936Egypt Department of Internal Medicine Faculty of Medicine.Tanta UniversityTanta 31527Egypt Department of Tropical Medicine Gastroenterology and HepatologyAssiut University HospitalAssiut 71515Egypt

Inflammatory bowel disease(IBD)is a chronic inflammatory illness of the *** the mechanism underlying the pathogenesis of IBD is not fully under-stood,it is believed that a complex combination of host immunological response,environmental exposure,particularly the gut microbiota,and genetic suscept-ibility represents the major *** gut virome is a group of viruses found in great frequency in the gastrointestinal tract of *** gut virome varies greatly among individuals and is influenced by factors including lifestyle,diet,health and disease conditions,geography,and *** majority of research has focused on the significance of gut bacteria in the progression of IBD,although viral populations represent an important component of the *** conducted this review to highlight the viral communities in the gut and their expected roles in the etiopathogenesis of IBD regarding published research to date.

关键词： Inflammatory bowel disease Pathogenesis Gut virome Bacteriophage Eukaryotic viruses

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