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Proposed Privacy Preservation Technique for Color Medical Images

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Intelligent Automation & Soft Computing 2023年第4期36卷 719-732页

作者： Walid el-Shafai Hayam A.abd el-hameed Noha A.el-Hag Ashraf A.M.Khalaf Naglaa F.Soliman Hussah Nasser AlEisa Fathi E.abd el-Samie Department of electronics and electrical Communications Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Security Engineering Laboratory Department of Computer SciencePrince Sultan UniversityRiyadh11586Saudi Arabia electrical Communications Engineering Department Faculty of EngineeringMinia UniversityMinia61111Egypt Higher Institute of Commercial Science Management Information SystemsEl-Mahala El-KobraEgypt Department of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia

Nowadays,the security of images or information is very *** paper introduces a proposed hybrid watermarking and encryption technique for increasing medical image ***,the secret medical image is encrypted using Advanced Encryption Standard(AES)***,the secret report of the patient is embedded into the encrypted secret medical image with the Least Signiﬁcant Bit(LSB)watermarking *** that,the encrypted secret medical image with the secret report is concealed in a cover medical image,using Kekre’s Median Codebook Generation(KMCG)***,the stego-image obtained is split into 16 ***,it is sent to the *** adopt this strategy to send the secret medical image and report over a network *** proposed technique is assessed with different encryption quality metrics including Peak Signal-to-Noise Ratio(PSNR),Correlation Coefﬁcient(Cr),Fea-ture Similarity Index Metric(FSIM),and Structural Similarity Index Metric(SSIM).Histogram estimation is used to conﬁrm the matching between the secret medical image before and after *** results demonstrate that the proposed technique achieves good performance with high quality of the received medical image and clear image details in a very short processing time.

关键词： LSB steganography AES algorithm KMCG algorithm

Human recombinant soluble ACE2(hrsACE2)shows promise for treating severe COVID19

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Signal Transduction and Targeted Therapy 2020年第1期5卷 303-304页

作者： Tarek Mohamed abd el-Aziz ahmed Al-Sabi James D.Stockand Department of Cellular and Integrative Physiology University of Texas Health Science Center at San AntonioSan AntonioTX 78229-3900USA Zoology Department Faculty of ScienceMinia UniversityEl-Minia 61519Egypt College of Engineering and Technology American University of the Middle EastKuwaitKuwait

A recent study by Zoufaly et *** in The Lancet Respiratory Medicine describes encouraging data from the first severe COVID-19 patient successfully treated with human recombinant soluble angiotensin-converting enzyme-2(hrsACE2).1 The published data document upon treatment of an adaptive immune response,the disappearance of the virus swiftly from the serum,the nasal cavity and lungs,and a reduction of inflammatory cytokine levels that are critical for COVID-19 ***,the use of hrsACE2 did not impede the generation of neutralizing antibodies,leading to a significant clinical improvement of the treated patient.

关键词： ACE2 al cavity

Pegylated interferon α/ribavirin therapy enhances bone mineral density in children with chronic genotype 4 HCV infection

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World Journal of Pediatrics 2017年第4期13卷 346-352页

作者： ahmed Megahed Nanees Salem Abeer Fathy Tarik Barakat Mona abd el Latif Alsayed Suzy abd el Mabood Khaled R Zalata ahmed F abdalla Pediatric Gastroenterology and Hepatology Unit Mansoura University Children's HospitalFaculty of MedicineMansoura UniversityEgypt Pediatric Endocrinology Unit Mansoura University Children's HospitalFaculty of MedicineMansoura UniversityEgypt Pediatric Hematology&Oncology Unit Mansoura University Children's HospitalFaculty of MedicineMansoura UniversityEgypt Pathology Department Faculty of MedicineMansoura UniversityEgypt

Background:The impact of chronic hepatitis C (CHC) on bone mineral density (BMD) has been well studied in adults with a relative paucity of data in children,especially concerning effect of treatment with pegylated interferon (PEG-IFN) plus ribavirin (RV).In the current work,we assessed prospectively changes in BMD in children with CHC before,during,and after ***:Forty-six consecutive children with noncirrhotic genotype 4 CHC were subjected to dual-energy X-ray absorptiometry at baseline,24 weeks,48 weeks of therapy and 24 weeks after ***,bone mineral content (BMC),and Z score of lumbar spine (L2-L4) were *** pubertal stage,viral load,liver function tests,serum calcium,phosphorus,alkaline phosphatase,parathyroid hormone,and liver histopathology were assessed in all included ***:Thirty (65.2%) patients had normal BMD,10 (21.7%) were at risk for low BMD,and 6 (13.1%) had low BMD for chronological *** with low BMD were significantly older (P=0.001),with higher frequency of delayed puberty than other groups (P=0.002).Baseline densitometric parameters (BMD & BMC) were significantly positively correlated with patients' age,weight,height,body mass index and hemoglobin level;while they were insignificantly correlated with basal viral load,histopathology activity index and fibrosis *** parameters improved significantly on PEG-IFN plus RV treatment,this improvement was found to be sustainable 24 weeks after ***:Low BMD is detectable in a proportion of CHC *** therapy leads to a sustainable increase in BMD.

关键词： bone mineral density chronic hepatitis C pegylated interferon ribavirin

Facies Analysis and Biostratigraphy of the Miocene Sequence,Cairo-Suez District,Egypt

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Journal of Earth Science 2017年第1期28卷 1-8页

作者： abdelbaset el-Sorogy Mohamed abd-elmoneim ahmed Mowafi Khaled Al-Kahtany Hisham Gahlan Department of Geology and Geophysics College of Science King Saud University Riyadh 11451 Saudi Arabia Geology Department Faculty of Science Zagazig University Zagazig 44519 Egypt

Miocene siliciclastic-carbonate deposits are widely exposed in Cairo-Suez District, Egypt. These deposits are underlain and overlain by continental sediments of Oligocene and post Miocene, respectively. Three stratigraphic sections were investigated at Gabals Geneife, Homeira and Gharra. Lithostrtigraphically, the Miocene sequence could be differentiated into two main rock units representing shallow deposits with relatively intermittent deep marine incursions. These are from base to top, Gharra Formation and Genefe Formation. Detailed macrofossils investigations led to the recognition of four macrofossil zones, namely Alectryonella plicatula-Crassostrea frondosa Range Zone, Echinolampas amplus-Scutella ammonis Range Zone, Chlamys（Macrochlamys） sardoa-Chlamys（Argopecten） submalvinae Range Zone, and Chlamys gentoni-Pecten（Oppenheimopecten） benedictus-Pecten（P.） ziziniae Assemblage Zone. Microfacies analysis and identified taxa indicated that the Miocene sequence was deposited in transgressive-regressive cycles ranged from near shore, warm shallow inner to middle shelf marine environments with storm influence during the accumulation of the oyster banks.

关键词： facies analysis biostratigraphy Miocene Cairo-Suez District Egypt.

Predictors of long-term survival after pancreaticoduodenectomy for peri-ampullary adenocarcinoma: A retrospective study of 5-year survivors

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Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 443-449页

作者： Ayman el Nakeeb Mohamed el Sorogy Helmy Ezzat Rami Said Mohamed el Dosoky Mohamed abd el Gawad ahmed M elsabagh Ehab el Hanafy Gastroenterology Surgical Center Mansoura University

Background: Pancreaticoduodenectomy(PD) is the standard curative treatment for periampullary tumors. The aim of this study is to report the incidence and predictors of long-term survival( ≥ 5 years) after PD. Methods: This study included patients who underwent PD for pathologically proven periampullary adenocarcinomas. Patients were divided into 2 groups: group(I) patients who survived less than 5 years and group(II) patients who survived ≥ 5 years. Results: There were 47(20.6%) long-term survivors( ≥ 5 years) among 228 patients underwent PD for periampullary adenocarcinoma. Patients with ampullary adenocarcinoma represented 31(66.0%) of the long-term survivors. Primary analysis showed that favourable factors for long-term survival include age < 60 years old, serum CEA < 5 ng/mL, serum CA 19-9 < 37 U/mL, non-cirrhotic liver, tumor size < 2 cm, site of primary tumor, postoperative pancreatic fistula, R0 resection, postoperative chemotherapy, and no recurrence. Multivariate analysis demonstrated that CA 19-9 < 37 U/mL [OR(95% CI) = 1.712(1.24 8–2.34 8), P = 0.001], smaller tumor size [OR(95% CI) = 1.335(1.032–1.726), P = 0.028] and R0 resection [OR(95% CI) = 3.098(2.095–4.582), P < 0.001] were independent factors for survival ≥ 5 years. The prognosis was best for ampullary adenocarcinoma, for which the median survival was 54 months and 5-year survival rate was 39.0%, and the poorest was pancreatic head adenocarcinoma, for which the median survival was 27 months and 5-year survival rate was 7%. Conclusions: The majority of long-term survivors after PD for periampullary adenocarcinoma are patients with ampullary tumor. CA 19-9 < 37 U/mL, smaller tumor size, and R0 resection were found to be independent factors for long-term survival ≥ 5 years.

关键词： Pancreatic carcinoma Pancreatic head carcinoma Pancreaticodudenectomy Long-term survival

Improvement of geotechnical properties of sabkha soil utilizing cement kiln dust

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第4期9卷 749-760页

作者： abdullah A.Al-Homidy Mohammed H.Dahim ahmed K.abd el Aal Department of Civil Engineering Najran University Geology Department Faculty of ScienceAl Azhar University

Improvement of properties of weak soils in terms of strength,durability and cost is the key from engineering point of *** weak soils could be stabilized using mechanical and/or chemical *** added during chemical stabilization could improve the engineering properties of treated *** utilized have to satisfy noticeable performance,durability,low price,and can be easily *** cement kiln dust(CKD) is industrial by-product,it would be a noble task if this waste material could be utilized for stabilization of sabkha *** study investigates the feasibility of utilizing CKD for improving the properties of sabkha *** samples are prepared with 2% cement and 10%,20% or 30% CKD and are tested to determine their unconfined compressive strength(UCS),soaked California bearing ratio(CBR) and *** of stabilization is studied utilizing advanced techniques,such as the scanning electron microscope(SEM),energy dispersive X-ray analysis(EDX),backscattered electron image(BEI) and X-ray diffraction analysis(XRD).It is noted that the sabkha soil mixed with 2% cement and 30% CKD could be used as a sub-base material in rigid *** incorporation of CKD leads to technical and economic benefits.

关键词： Sabkha soil Geotechnical properties Soil improvement Cement kiln dust(CKD) Unconfined compressive strength(UCS) Soaked California bearing ratio(CBR) Durability

Effect of Microalloying Additions on the Microstructure and Mechanical Properties of Low Carbon Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 246-251页

作者： EISSA Mamdouh abd el-Aziz ahmed GHALI Saeed HALFA Hossam SABER Shady Central Metallurgical Research & Development Institute "CMRDI" Faculty of Material Science and Engineering German University in Cairo "GUC"

Low carbon steels are characterized by good weldability,formability and fracture toughness ***,the low strength levels of these steel grades limit their wide *** the other hand,increasing the strength by increasing the carbon content and alloying elements deteriorates the other *** this study,the microalloying technique was used to examine the possibility of attaining low carbon steels with good combination of strength,ductility and impact properties.A low carbon steel microalloyed with single addition of vanadium and another one microalloyed with combined addition of vanadium and titanium were used in this investigation and their properties were compared with non-microalloyed low carbon steel having the same base ***,other two nonmicroalloyed and V-microalloyed steels with higher carbon,silicon and manganese contents were also investigated to reveal the effect of base ***,hardness,room and zero temperature Charpy V-notch impact tests were conducted to evaluate the variations in the mechanical properties of low carbon hot forged steel containing vanadium and combinations of vanadium and *** addition,the microstructures of the different investigated steels were observed using both optical microscope and scanning electron ***,the hardness of the ferrite phase was also determined using micro-hardness *** results showed improvement of the mechanical properties of the investigated steels by both single V-and combined V + ***,hardness and impact tests results indicated that good combinations of strength,ductility and impact properties can be achieved by V-microalloying *** with combination of V and Ti microaddition has much higher hardness,yield strength,ultimate tensile strength and impact energy at both room and zero temperatures compared with non-microalloyed and single Vmicroalloyed *** C,Si and Mn contents result in

关键词： low carbon steels single microalloying combined microalloying strength ductility impact energy grain refinement precipitation strengthening

Spectrofluorimetric and Spectrophotometric Stability- Iwndicating Methods for the Analysis of Veralipride in Presence of Its Degradants and in Spiked Human Plasma

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Chinese Journal of Chemistry 2012年第1期30卷 183-189页

作者： Salama,Nahla Nour el Din ahmed Salem,Maissa Yacoub abd el Halim,Lobna Mohammed abdel Fattah,Laila EI-Sayed National Organization for Drug Control and Research(NODCAR) 6 Abu Hazem StreetPyramids AveP.O.Box 29GizaEgypt Analytical Chemistry Department Faculty of PharmacyCairo UniversityCairoEgypt Analytical Chemistry Department Faculty of PharmacyMisr University for Science and Technology6th of OctoberEgypt

Spectrofluorimetric and spectrophotometric stability-indicating methods were developed and validated for analysis of veralipride （Ver） in presence of its hydrolytic and oxidative degradants. The spectrofluorimetric method was based on direct measurement of the intrinsic fluorescence of Ver at 366 nm after excitation at 299 nm using sodium lauryl sulfate （SLS） as micelle enhancer. The fluorescence intensity plot was linear over the concentration range 1.0-10.0 ***-1. The high sensitivity of the method allowed its successful application to the analysis of Ver in spiked human plasma. Two other methods were developed. They are based on the oxidative coupling reac- tion of Vet with 3-methyl benzothiazolin-2-one hydrazone （MBTH） hydrochloride in presence of ceric ammonium sulphate in an acidic medium. The first method depends on spectrophotometric measurement of the stable green colored oxidative coupling product at 660 nm. The different experimental parameters affecting the reaction were optimized. Linearity range is 10.0--100.0 ~tgomL-1. The second method depends on a fluorescence quenching effect of Vet on the fluorescence of Ce3＋. The difference in fluorescence intensity was measured at 380 nm after excitation at 300 nm. This method is applicable over the concentration ranges 0.25-2.50 pg-mL-1. The methods were validated according to the ICH guidelines. They were successfully applied for the analysis of Ver in drug substance, drug product and in laboratory prepared mixtures containing different percentages of hydrolytic and oxidative degradants.

关键词： veralipride micelle-enhanced fluorescence MBTH validation stability fluorescence quenching Ce3+

Hepatitis C Virus RNA Strands Detection in Peripheral Blood Mononuclear Cells Legitimizes Virus Eradication in Negative Serum PCR Naive and Post-treatment Patients

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Journal of Clinical and Translational Hepatology 2017年第1期5卷 1-8页

作者： Mohamed Darwish ahmed abd Alla Mostafa Kamel el Awady Tropical Medicine Department Faculty of MedicineAl-Azhar UniversityCairoEgypt Department of Microbial Biotechnology National Research CenterCairoEgypt

Background and Aims:Hepatitis C virus(HCV)hepatotropism is associated with intra-peripheral blood mononuclear cell(PBMC)infection that causes post-treatment relapse in RNA seronegative *** understanding of the association of non-viremic hepatic fibrosis with positive anti-HCV IgG antibodies and active hepatocellular damage might be increased by PBMCs screening for intracellular ***,the goals of this study included evaluation of PBMCs PCR for diagnosing HCV infection,addressing PBMCs plus serum real-time(SRT)PCR benefits over SRT-PCR alone,studying intraPBMCs distribution of RNA sense and antisense strands,and identifying treatment feasibility in solitary intracellular ***:Enzyme-linked immunosorbent assay,SRT-PCR and PBMCs PCR were used to evaluate HCV infection in 401 *** patients were classified into groups of negative controls(n=30),positive controls(n=63),non-viremia post-treatment(experienced;n=166)and na(i)ve(n=49)cases,and non-viremia positive PBMCs PCR na(i)ve(n=35)and experienced(n=58)***:The diagnosis of true positive and negative by PBMCs PCR and SRT-PCR had 100%and 96.7%compatibility *** PCR detected intracellular HCV infection in 49 out of 215 non-viremia patients;among them,na(i)ve cirrhotics had significantly higher number of intracellular infection than the na(i)ve non-cirrhotic(Pely recognized in na(i)ve and experienced cases(P=0.01218).Intracellular HCV strands were detected in 18.02%of experienced *** of intracellular RNA strands showed significant decline in experienced compared to na(i)ve patients(Pellular HCV when SRT-PCR is *** and sense strands are respectively recognized more often in na(i)ve and experienced *** expected overall relapsing rate in our cohort was 18.02%.Int

关键词： HCV PBMCs RNA Strands