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An approach to evaluate the efficiency of γ-ray detectors to determine the radioactivity in environmental samples

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Chinese Physics C 2014年第6期38卷 60-66页

作者： Mohamed.S.Badawi Ahmed.M.el-khatib Samah.M.Diab Sherif.S.Nafee Ekram.A.el-Mallah Physics Department Faculty of Science Alexandria University 21511 Alexandria Egypt

This work provides an approach to determine the efficiency of T-ray detectors with a good accuracy in order to determine the concentrations of either naturally occurring or artificially prepared radionuclides. This approach is based on the efficiency transfer formula （ET）, the effective solid angles, the self- absorptions of the source matrix, the attenuation by the source container and the detector housing materials on the detector efficiency. The experimental calibration process was done using radioactive （Cylindrical ＆ Marinelli） sources, in different dimensions, that contain aqueous 152Eu radionuclide. The comparison point to a fine agreement between the experimental measured and calculated efficiencies for the （NaI ＆ HPGe） detectors using volumetric radioactive sources.

关键词： y-ray detector efficiency efficiency transfer effective solid angles radioactive source

Epidemiology,etiology,and outcomes of in-hospital cardiac arrest in Lebanon

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Journal of Geriatric Cardiology 2021年第6期18卷 416-425页

作者： Ahmed eltarras Youssef Jalloul Ola Assaad Michael Bejjani Yara Yammine Nina khatib Abdallah Rebeiz Mazen el Sayed Marwan Refaat Geriatric Medicine Division Saint Louis University School of MedicineMissouriUSA Department of Internal Medicine American University of Beirut Medical CenterBeirutLebanon Faculty of Medicine American University of BeirutBeirutLebanon School of Nursing American University of BeirutBeirutLebanon Department of Emergency Medicine American University of Beirut Medical CenterBeirutLebanon

BACKGROUND In-hospital cardiac arrest(IHCA)constitutes a significant cause of morbidity and *** data is scarce in the Middle East and Lebanon,we devised this study to shed some light on it to better inform both hospitals and policymakers about the magnitude and quality of IHCA care in *** We analyzed retrospective data from 680 IHCA events at the American University of Beirut Medical Center between July 1,2016 and May 2,*** variables included age and sex,in addition to the comorbidities listed in the Charlson comorbidity *** event variables were day,event location,time from activation to arrival,initial cardiac rhythm,and the total number of IHCA *** also looked at the months and *** considered the return of spontaneous circulation(ROSC)and survival to discharge(StD)to be our outcomes of *** The incidence of IHCA was 6.58 per 1,000 hospital admissions(95%CI:6.09−7.08).Non-shockable rhythms were 90.7%of *** IHCA cases occurred in the closed units(87.9%)(intensive care unit,respiratory care unit,neurology care unit,and cardiology care unit)and on weekdays(76.5%).ROSC followed more than half the IHCA events(56%).However,only 5.4%of IHCA events achieved *** ROSC and StD were higher in cases with a shockable *** outcomes were not significantly different between day,evening,and *** was not significantly different between weekdays and weekends;however,StD was higher in events that happened during weekdays than weekends(6.7%vs.1.9%,P=0.002).CONCLUSIONS The incidence of IHCA was high,and its outcomes were lower compared to other developed *** outcomes were better for patients who had a shockable rhythm and were similar between the time of day and days of the *** findings may help inform hospitals and policymakers about the magnitude and quality of IHCA care in Lebanon.

关键词： policy return listed

Oculoplastic publication trends in general ophthalmology journals

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International Journal of Ophthalmology(English edition) 2022年第11期15卷 1852-1856页

作者： Jean-Paul Dray Nur khatib Eric Souied Peerooz Saeed Guy Ben Simon Juliana Gildener-Leapman Ofira Zloto Department of Ophthalmology Centre Hospitalier Intercommunal de CreteilCreteil 94000France Orbital Center Department of OphthalmologyAmsterdam University Medical CentersAmsterdam 1105the Netherlands Goldschleger Eye Institute Sheba Medical CenterAffiliated to the Sackler Faculty of MedicineTel Aviv UniversityTel Aviv6997801Israel Meir Medical Center Kfar Saba 4428164Israel

AIM: To examine the publication trend of oculoplastic articles throughout the last decade in general ophthalmology ***: A review of all abstracts published between Januar y 2010 to December 2019 in general, clinical ophthalmic journals was conducted. Articles that were categorized as original articles in general and clinical journals were included in the ***: Totally 10 281 abstracts were included. Of them 465(4.5%) were oculoplastic publications. The mean number of annual-publications was 46.5 and the mean annual-rate of oculoplastic publications was 4.51%. A significant decreasing trend in the number of oculoplastic publication in the last decade was found(Pelid diseases, 160(34.40%) were about orbit diseases, 92(19.80%) were about lacrimal diseases and 34(7.30%) were about thyroid eye disease(TED). A significant decreasing trends in the number of orbital and eyelids publications were found(Pelids, TED and lacrimal-diseases publications throughout the last ***: Oculoplastic subspecialty deals with a wide range of pathologies in different ages. However, less than 5% of the articles in general, clinical, high impact factor ophthalmology journals are about oculoplastic diseases. One of the best way for ophthalmologists from different subspecilties, nowadays, to be updated, is to read highimpact-factor, general ophthalmology journals. Therefore, it is important that those journals will include articles about breakthroughs in oculoplastic.

关键词： oculoplastic publications journals general articles ophthalmology

The role of nickel(II) on the homochirality of amino acids in living systems

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Chinese Chemical Letters 2010年第1期21卷 113-116页

作者： Awni khatib Fathi Aqra Department of Chemistry Faculty of Science and TechnologyHebron UniversityPO Box 40HebronWest BankPalestine

The origin of homochirality in living organisms is controversial,stands out of being particularly important and a question which is still not satisfactorily answered.A mental picture of sequence of events that is thought to have preceded the existence of chirality in molecules is described.A chemical model to mimic the original abiotic conditions in an attempt to explain the preference of homochirality in living systems was *** effect which might have influenced this preference is *** surpri...

关键词： Homochirality Living organisms Chiral preference

Liposuction for chronic medical diseases and noncosmetic conditions:review of the literature

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Plastic and Aesthetic Research 2015年第1期2卷 1-6页

作者： Hamdy Abuelhassan el-khatib Department of Plastic and Hand Surgery Alkhor HospitalHamad Medical CorporationDoha 00974Qatar

The purpose of this systematic literature review was to evaluate the safety of liposuction techniques and to identify the cosmetic and noncosmetic application of *** can be used to improve the quality-of-life in patients with disabling medical conditions in addition to its use for cosmetic *** online search of the Cochrane Library,MEDLINE,Embase,and ScielO were ***-seven original articles reported from 1982 to February 2014 were included in this *** articles reported on the use as well as the limitations of liposuction for treatment of noncosmetic and disabling medical *** criteria used for selection of articles were:large sample size and *** case reports were *** was a broad agreement about the applicability and the efficacy of the liposuction for treatment of these chronic medical conditions,such as multiple systemic lipomatosis,dercum’s disease,chronic lymphedema,and axillary *** review confirmed that Liposuction technique has provided significant and stable cure for these chronic medical *** is the most frequent esthetic procedure for adipose tissue reduction and treatment of lipedema *** from esthetic indications,liposuction can also be used to treat chronic medical diseases and noncosmetic conditions.

关键词： Liposuction noncosmetic indications lipomatosis

Performance of Desiccant-Based Cooling Systems in Hot-Humid Climates: A Review

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Energy Engineering 2021年第4期118卷 875-909页

作者： Maatouk Khoukhi Omar Al khatib Architectural Engineering Department College of EngineeringUnited Arab Emirates UniversityAl AinUnited Arab Emirates

This paper reviews the principle and application of the thermally activated desiccant cooling systems with their capability to perform efficiently in hot-humid *** paper first introduces the continuous increase of thermal comfort required in building and their relation with the consumption of conventional energy *** importance of desiccant cooling technology and its applications has been introduced as *** energy and environmental issues with the conventional energy supply and the demand with the environmental problems and conditions mainly related to indoor air quality have been also discussed in the second chapter of this *** third part of this paper deals with different techniques and systems applied for cooling and dehumidification including the principles of solid and liquid desiccant ***,these systems perform well in hothumid *** result of a case study of the solid desiccant cooling system combined with solar energy for the desiccant wheel regeneration has been presented in the last chapter in this paper to show the capability of these systems once well applied in a hot-humid climate.

关键词： Desiccant cooling energy performance thermal comfort environmental condition solar energy

Association between Serum 25-hydroxy Vitamin D Concentration and Taql Vitamin D Receptor Gene Polymorphism among Jordanian Females with Breast Cancer

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Chinese Medical Journal 2017年第9期130卷 1074-1078页

作者： Manar Fayiz Atoum Yasmeen Mohammad Al-khatib Department of Medical Laboratory Sciences Faculty of Allied Health Hashemite University Zarqa 13115 Jordan

Background： Breast cancer is the most common type of cancer among females. Genetic polymorphisms might have a role in carcinogencsis. The aim of this study was to determine whether C to T base substitution within Taql Vitamin D receptor （VDR） gene （rs731236） in exon 9 was a risk factor among patients with breast cancer. Methods： Peripheral blood was drawn from 122 Jordanian breast cancer patients and 100 healthy Jordanian volunteers in Al-Bashecr Hospital during the summer months （from June to November of 2013, 2014, and 2015）. DNA was amplified using polymerase chain reaction （PCR）, followed by Taql restriction enzyme digestion. Quantification of serum 25-hydroxy Vitamin D （25[OH]D） level was determined by competitive immunoassay elecsys. Results： Genotypic frequencies for Taql TT, Tt, and tt genotypes were 41%, 46%, and 13% for breast cancer compared to 42%, 50%. and 8% for control, respectively. Vitamin D serum level was significantly lower in the breast cancer patients （8.1 ± 0.3 ng/ml） compared to the control group （21.2± 0.6 ng/ml; P =0.001）. This study showed an inverse association between 25（OH）D serum level and brcasl cancer risk （odds ratio [OR], 22.72, 95% confidence interval [C/], 10.06 51.29）. Conclusions： An inverse association was found between 25（OH）D serum level and breast cancer risk. Statistical difference was also found between different VDR Taql genotypes and circulating levels of 25（OH）D among Jordanian females with breast cancer.

关键词： Breast Cancer Genotypes Taql Vitamin D Receptor

Heat shock protein 90 is a potential therapeutic target for ameliorating skeletal muscle abnormalities in Parkinson's disease

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Neural Regeneration Research 2014年第6期9卷 616-621页

作者： Nour Erekat Ahed Al-khatib Muhammed Al-Jarrah Department of Anatomy Faculty of Medicine Jordan University of Science and Technology (JUST) Department of Pathology Faculty of Medicine Jordan University of Science and Technology Department of Rehabilitation Sciences Faculty of Applied Medical Sciences Jordan University of Science and Technology Fatima College of Health Sciences (FCHS)

Previous studies have confirmed that heat shock protein 90 overexpression can lead to dopami- nergic neuronal death. This study was designed to further investigate what effects are produced by heat shock protein 90 after endurance exercise training. Immunohistochemistry results showed that exercise training significantly inhibited heat shock protein 90 overexpression in the soleus and gastrocnemius in Parkinson＇s disease rats, which is a potential therapeutic target for ameliorating skeletal muscle abnormalities in Parkinso^s disease.

关键词： nerve regeneration heat shock protein 90 Parkinson's disease exerecise soleus muscle gastrocnemius muscle skeletal muscle treadmill excise neural regeneration

Springer Handbook of Robotics 2008

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