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Plastic Deformation Evaluation of 6201 Alloy by Using Positron Annihilation Lifetime Technique

材料科学与工程（中英文A版） 2013年第1期3卷 14-21页

作者： amira.Nassar Magda Abd El-Wahab Eman Abd EL Hamid Zeinab Yousef Metal Physics Lab. Solid State Physics Department National Research Center Dokki Cairo P.O. 1231 I Egypt Physics Department Faculty of Women for Arts Science and Education A in Shams University Heliopolis Cairo 1175 7 Egypt

The effect of cold drawn on the mechanical properties and structural defects of 6201 alloy used as conductor cables was studied. The effect of heat treatment at 350 and 500 °C after deformation as well as deformed at room temperature (RT) was investigated in order to identify an optimized heat treatment for different cold drawn samples. The mechanical properties and microstructure were determined by using Vickers micro hardness (Hv) and scanning electron microscopy (SEM), respectively. The Evaluation of three distinguished stages observed in this investigation was discussed by using positron annihilation lifetime (PAL) technique. The present work demonstrates that PAL can provide valuable information about the microstructure of cold drawn 6201 alloy.

关键词：正电子湮没寿命塑性变形技术评价合金扫描电子显微镜微观结构结构缺陷机械性能

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Dedicated Magnetic Resonance Imaging Sequences:Contribution in the Diagnosis of Focal Epilepsy in the Lebanese Population

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Journal of Health Science 2018年第6期6卷 439-445页

作者： Najo A.Jomaa Marwan Haddad Grace Y.Adwane amira J.Zaylaa Abdallah Rahbani Faculty of Medical Sciences Lebanese UniversityHadath Baabda 1003Lebanon Imaging Department Mount Lebanon HospitalHazmieh 1107Lebanon Epilepsy monitoring unit Department of NeurologyLebanese Geitaoui University HospitalAchrafieh Beirut 1100Lebanon Doctoral School of Science and Technology Lebanese UniversityHadath Baabda 1003Lebanon

There have been many advances in the diagnosis and management of focal epilepsies particularly with neuroimaging techniques and magnetic resonance imaging(MRI).Special MRI sequences can be employed to localize and resect the epileptogenic lesions responsible for focal *** study aims to show the benefit of dedicated epilepsy MRI sequences in the diagnosis of focal epilepsies.A general electric 1.5 Tesla MRI machine was used with standard and special ***,a Nihon Kohden electroencephalography(EEG)machine was *** is a prospective observational study that included 51 patients with focal epilepsies who had an initial negative brain *** underwent epilepsy MRI sequences along with a prolonged video EEG monitoring to localize the lesion,and then results were analyzed statistically using SPSS 22 *** majority of patients were males(62.75%)with a mean age of 30 *** grand majority of patients(74.5%,p value of 0.001)had their lesion localized by the epilepsy *** most commonly found pathology was mesial temporal sclerosis.A significant number of patients(23.5%)were sent for an epilepsy surgery(p value 0.002).This study shows the significant impact of dedicated epilepsy MRI sequences on the diagnosis and management of focal epilepsy in the Lebanese population.

关键词： Epilepsy magnetic resonance imaging dedicated sequences focal epileptogenic lesions hippocampal sclerosis cortical dysplasia.

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In vitro inhibitory effects on a-glucosidase and a-amylase level and antioxidant potential of seeds of Phoenix dactylifera L.

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Asian Pacific Journal of Tropical Biomedicine 2016年第4期6卷 322-329页

作者： Shah Alam Khan amira Rashid Al Kiyumi Manal Saif Al Sheidi Tagreed Salim Al Khusaibi Noura Mohammed Al Shehhi Tanveer Alam Department of Pharmacy Oman Medical College Oman Medicinal Plants & Marine Natural Products University of Nizwa

Objective:To evaluate and compare the antioxidant activity,total phenolic contents(TPCs) and in vitro antidiabetic activity of various pits extracts obtained from five Omani date ***:Sun-dried mature fruits of five Omani date varieties,namely,Fardh,Naghal,Khalas,Khinazi and Khasab were purchased from the local market in Muscat,Oman in the month of September *** seed extracts ***,ethanol,methanol and acetone were prepared for each date variety and their antioxidant activities were investigated by 1,1-diphenyl-2-picrylhydrazyl,hydrogen peroxide scavenging method and reducing power assay method,*** vitro antidiabetic activity of the date pit extracts was evaluated by measuring their inhibitory effect on a-glucosidase and aamylase *** were also quantified ***:The results indicated that TPC of date seeds was solvent ***,ethanol and methanol were found to be significantly better solvents than water in extracting phenolic compounds from the date *** extracts exhibited moderate to good in vitro antioxidant activity and increased reducing *** all date pit extracts,water extract exhibited significant in vitro antidiabetic activity in comparison to standard drug,***:The present study confirms that disposed waste of Omani dates is a rich source of dietary antioxidant because of its high *** pits due to their inhibitory effects on a-glucosidase and a-amylase level could be used as a monotherapy along with an appropriate diabetic diet and exercise or might be in conjunction with antidiabetic therapy to manage and prevent progression of diabetes.

关键词： Phoenix dactylifera L. Antioxidant In vitro antidiabetic activity Date pits

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