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Search Results: 1 - 10 of 5740 matches for " Aisha Youssif Hassan Helali "
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Utility of 2-Methyl-quinazolin-4(3H)-one in the Synthesis of Heterocyclic Compounds with Anticancer Activity  [PDF]
Aisha Youssif Hassan Helali, Marwa Taha Mostafa Sarg, Makarem Mohamed Said Koraa, Mona Said Fathy El-Zoghbi
Open Journal of Medicinal Chemistry (OJMC) , 2014, DOI: 10.4236/ojmc.2014.41002
Abstract:
Quinolino[2,1-b]quinazolines 3 and 4, pyrrolo[2,1-b]quinazoline 5 and various substituted 2-(4-chlorostyryl)quinazoline derivatives including: 4-amino derivative 8, 4-hydrazino derivative 9, thiourea derivative 10, thiosemicarbazide derivative 19, 4-benzylidene hydrazinyl derivative 21, 4-amino thiazolidene derivatives 11, 12, 13, 22, imidazoquinazolines 15, 16, quinazolinium chloride 14, triazino[4,3-c]quinazolines 17, 18, tetrazino[1,6-c]quinazoline 20, 4-amino azetidinyl derivative 23, triazolo[4,3-c]quinazoline 24, 4-amino substituted quinazolines 25, 26, 27, 29 and quinazolino quinazoline 28 were synthesized through different chemical reactions. The obtained compounds were evaluated for their in vitro antitumor activity against HEPG2 and MCF-7 cell lines compared to the reference drug (doxorubicin). Compounds 18, 19, 20, 23 and 24 were found to be the most active against both cell lines exhibiting IC50 values ranging from 10.82 - 29.46 μM/L and 7.09 - 31.85 μM/L against Hep-G2 and MCF-7 cell lines, respectively, in addition to docking study of these five compounds against thymidylate synthase and dihydrofolate reductase enzymes active sites.
Evaluation of Some Insulated Greases Prepared from Rubber and Bitumen Thickeners  [PDF]
Amaly Mohamed Hassan, Azza Mahmoud Mazrouaa, Mona Ali Youssif, Rabab Mohamed Abou Shahba, Maha Ali Youssif
International Journal of Organic Chemistry (IJOC) , 2013, DOI: 10.4236/ijoc.2013.31008
Abstract: The wax gel grease (S0) was prepared from a mixture of 2.3:1 base oil blend (base oil grade 260/290, transformer oil), and microcrystalline wax in the presence of 0.1% - 2% of polyoxyethylene sorption nano-palmitate as antioxidant and 2,2 methylene bis (4-methyle-6-tertiary butyl phenol) as anticorrosion. It was found that the prepared Wax gel grease has inconvenient physico-chemical and dielectric properties, so in order to improve its physico-chemical properties (viscosity, penetration, dropping point and water resistance) and dielectric Properties (dielectric constant, dielectric loss and volume resistivity), Butyl rubber, isoprene rubber and bitumen were added separately as thickening agents to the prepared wax gel in certain proportion at certain frequency range 1 - 1000 KHz at 35°C. The best dielectric properties were achieved by adding butyl rubber to the prepared wax gel.
The Saudi Journal of Kidney Diseases and Transplantation: A New Appearance for the New Millennium
Abu-Aisha Hassan
Saudi Journal of Kidney Diseases and Transplantation , 2001,
Abstract:
Problematic Internet Users and Psychiatric Morbidity in a Sample of Egyptian Adolescents  [PDF]
Mona Reda, Menan Rabie, Nesrin Mohsen, Aisha Hassan
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.38096
Abstract: Background: A growing body of research suggests that Problematic Internet use is becoming more common in society as on-line usage increases everyday. Is psychiatric morbidity common among problematic internet users? What are the characteristics of these patients? Methods: 501 adolescents (295 males), 11 - 18 years old, recruited from 2 private (group 1) and 2 governmental schools (group 2). All were subjected to A Psychiatric sheet, An Informative designed questionnaire, Fahmy and El Sherbiny’s Social Classification Scale, Young internet addiction test (IAT), and Mini International Neuropsychiatric Interview for children and adolescents (MINI KID). Results: Comparison between the two groups in regard places of use of internet, number of computers available, money spent on internet activities, parental knowledge of use, duration of use and purpose of use, revealed significant differences. Problematic internet use was more frequent in group 1, while internet addiction was more frequent in group 2. A significant relation was found between IAT score and social phobia, specific phobia and oppositional defiant disorder, and a highly significant relation with generalized anxiety disorder and ADHD. Female sex, horror movies and internet problematic use are independent predictors of psychiatric morbidity. Male sex, private schools, high social class are independent predictors for internet use problems in our sample. Conclusion: This study revealed that Egyptian adolescents are at high risk for problematic internet use and to a lesser extent Internet Addiction. Adolescents with Problematic Internet use were more prone to psychiatric disorders (social phobia, specific phobia, oppositional defiant disorders, generalized anxiety disorder and ADHD)
Stylomastoid Foramen Osteoma: Unique Challenges for Appropriate Management  [PDF]
Aisha Larem, Sally Sheta, Abdulsalam Al-Qahtani, Hassan Haidar
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2015, DOI: 10.4236/ijohns.2015.44047
Abstract: Osteoma of the temporal bone is a rare and slow-growing benign tumor. It is reported to affect almost all portions of the temporal bone. However, osteoma involving the stylomastoid foramen has never been reported in the literature. We report a case of an osteoma extending from the stylomastoid foramen and occluding the external auditory canal in a young female. Although the osteoma has very close relationship with the facial nerve, it was removed because of the severity of its associated symptomatology; the osteoma was completely removed without any postoperative complications. This report is of interest as it highlights the challenges in the management of osteomas in such localization.
Chemotherapy Correction of Haematological Changes Induced by T. evansi in Nubian Goats
M.F. Youssif,T. Hassan,K. El Malik
Journal of Medical Sciences , 2007,
Abstract: The combined action of CymelarsanR and/or Oxytetracycline (OTC) in goats experimentally infected with T. evansi was investigated. CymelarsanR and CymelarsanR OTC combination cleared the parasite from peripheral blood, while OTC alone delayed the death as compared to the untreated group. Haematological indices declined post infection, but returned to normal post treatment except in OTC treated group. The Mean Corpuscular Haemoglobin (MCH), Mean Corpuscular Haemoglobin Concentration (MCHC) and white blood cell and neutraphils increased but, basophiles and eosenophile disappeared post-infection. Monocytes appeared on day 7 and lymphocytes decreased post-infection. Treatment with CymelarsanR and/or OTC restored the haematological indices to normal in two weeks.
Performance Analysis of AMP For Mobility Management
Aisha-Hassan A. Hashim,Norsheila Fisal,Wan H. Hassan
International Journal of Engineering , 2008,
Abstract: In our previous work [1], a mechanism for handling movement detection using a proposed agent-based architecture for mobility management was described. This architecture, referred here as AMP - Agent-based Mobility Protocol, consists of a collaborative multi-agent system that enhances user/node mobility over an IP-based network. Specifically, mobility agents are placed in the hosts and at the access networks to expedite location and call management requirements. State information of mobile hosts (e.g. location and mobility profile) are relayed to the relevant agents who, in turn, will undertake appropriate tasks to ensure a smooth handover to the next cell(s) during an ongoing application session with minimum delay. In this paper, the performance of the AMP architecture and protocol is examined using derived analytical models. Mobile QoS (Quality of Service) may be defined by signaling traffic overhead, handoff latency and packet loss. A comparative analysis is made between the AMP architecture and the IETFa€ s standard mobility management protocol i.e. Mobile IPv6
Heat transfer characteristics of R410A during its evaporation inside horizontal tube
M. Fatouh, A.B. Helali, M.A.M. Hassan, A. Abdala
International Journal of Energy and Environment , 2011,
Abstract: Evaporative local heat transfer coefficients of R22 and R410A are determined in electrically heated a smooth horizontal copper tube with inner diameter of 9.525 mm and length of 1000 mm. Experiments are carried out varying: the vapor quality (0.1:1), the heat fluxes (10:29) kW/m2 and the evaporation temperatures (-5:5?C) at mass flux of 100 kg/m2s. Effect of the above operating parameters on heat transfer coefficients are investigated and reported in graphical forms. Experimental results showed that the heat transfer coefficients of R410A are better than those of R22, by about 17% and 14% during the lower and higher value of evaporating pressures and heat flux, respectively. The modified Kattan model results were found to be in much better agreement with the experimental results than the correlations from Gungor [12], Shah [20] and other correlations.
A Clinical Case of Recurrent Pleural Effusions, Culminating in Empyema-thoraces in a Sudanese Woman with Yellow Nail Syndrome
E. Mohamed Ahmed,Hassan Abu Aisha,Imadeldin E. Aradaib
International Journal of Tropical Medicine , 2012,
Abstract: A 50-years-old Sudanese woman was admitted to Elshaab Medical Teaching Hospital, Khartoum, Sudan. She had a history of repeated pleural effusions and a family history of yellow nail syndrome. The patient presented with productive cough, dyspnea and chest pain. On clinical examination, her nails were yellowish-green in color and dystrophic in appearance, thickened and excessively curved. X-ray and CT scan confirmed the presence of fluid in the right side of the chest. On administration of intercostals tube a purulent exudate was collected in the drain from the right side of the chest. The purulent exudate (empyema) was attributed to invasion of the pleural effusion by secondary bacterial organism. Microbiological examination revealed isolation and identification of Pseudomonas stutzeri from the infected pleural fluid. As severe dyspnea and chest pain continued, thoracotomy was decided and the patient was referred to thoracic surgery unit. The removal of pus and decortication of the pleura resulted in improved respiratory condition of the patient. The present study describes the first report of a clinical case of recurrent pleural effusions in association with yellow nail syndrome in a Sudanese patient.
Bioanalyzer: An Efficient Tool for Sequence Retrieval, Analysis and Manipulation
Hassan Tariq,Shahid Nadeem,Sobia Idrees,Aisha Yousaf
International Journal Bioautomation , 2010,
Abstract: Bioanalyzer provides combination of tools that are never assembled together. Software has list of tools that can be important for different researchers. The aim to develop this kind of software is to provide unique set of tools at one platform in a more efficient and better way than the software or web tools available. It is stand-alone application so it can save time and effort to locate individual tools on net. Flexible design has made it easy to expand it in future. We will make it available publicly soon.
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