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Jino George, Thibault Chervy, Atef Shalabney, Eloïse Devaux, Hidefumi Hiura, Cyriaque Genet, Thomas W Ebbesen
From the high vibrational dipolar strength offered by molecular liquids, we demonstrate that a molecular vibration can be ultrastrongly coupled to multiple IR cavity modes, with Rabi splittings reaching 24% of the vibration frequencies. As a proof of the ultrastrong coupling regime, our experimental data unambiguously reveal the contributions to the polaritonic dynamics coming from the antiresonant terms in the interaction energy and from the dipolar self-energy of the molecular vibrations themselves. In particular, we measure the opening of a genuine vibrational polaritonic band gap of ca...
October 7, 2016: Physical Review Letters
Hussein M Ageely, Ahmed E Agag, Syam Mohan, Atef Shehata
BACKGROUND: Khat (Catha edulis) is a controversial plant having a euphoretic effect, at the same time part of culture in many countries such as Africa and Arabian Peninsula. The presence of amphetamine-like substance, cathinone and cathine make this plant banned in many countries. Many neurological and other system related studies have been carried out in this plant, but the lack of toxicity studies are there especially the mechanism. OBJECTIVE: In this study, Madin-Darby Bovine Kidney cell line was used as an in vitro model to study the cell death mechanism...
July 2016: Pharmacognosy Magazine
Ehab Atef, Khaled Refaat Zalata, Hoda Atef, Ahmed A M Abdel-Hamid
BACKGROUND AND AIM: The use of BioEnterics intragastric balloon (BIB) is progressively increasing, owing to the fact that morbid obesity becomes a global epidemic together with risks of bariatric surgery. Yet, the possible local BIB effect on gastric mucosa is not clearly elucidated. The aim of the current study was to assess the histological changes occurring in the gastric mucosa post-BIB insertion. METHODS: Gastric mucosa biopsy was obtained from 87 cases of morbid obesity both pre-BIB and 6 months post-BIB insertion to compare the local changes by histological and immunohistochemical analysis...
October 14, 2016: Digestive Diseases and Sciences
Abdallah Mohamed Elsafti, Gerlant van Berlaer, Mohammad Al Safadi, Michel Debacker, Ronald Buyl, Atef Redwan, Ives Hubloue
OBJECTIVE: The Syrian civil war since 2011 has led to one of the most complex humanitarian emergencies in history. The objective of this study was to document the impact of the conflict on the familial, educational, and public health state of Syrian children. METHODS: A cross-sectional observational study was conducted in May 2015. Health care workers visited families with a prospectively designed data sheet in 4 Northern Syrian governorates. RESULTS: The 1001 children included in this study originated from Aleppo (41%), Idleb (36%), Hamah (15%), and Lattakia (8%)...
October 14, 2016: Disaster Medicine and Public Health Preparedness
Atef Thamri, Hamdi Baccar, Claudia Struzzi, Carla Bittencourt, Adnane Abdelghani, Eduard Llobet
The chemical modification of multiwalled carbon nanotubes (MWCNTs) with a long chain mercapto acid is reported as a way to improve sensitivity and response time of gas sensors for detecting alcohols, acetone and toxic gases such as DMMP. We have developed sensors employing MWCNTs decorated with gold nanoparticles and modified with a 16-mercaptohexadecanoic acid (MHDA) monolayer. Morphological and compositional analysis by Transmission Electron Microscopy (TEM), Fourier Transform Infra-red Spectroscopy (FTIR) and X-ray photoelectron spectroscopy were performed to characterize the gold nanoparticles and to check the bonding of the thiol monolayer...
October 10, 2016: Scientific Reports
Ahmed Bahieldin, Ahmed Atef, Sherif Edris, Nour O Gadalla, Hani M Ali, Sabah M Hassan, Magdy A Al-Kordy, Ahmed M Ramadan, Rania M Makki, Abdulrahman S M Al-Hajar, Fotouh M El-Domyati
BACKGROUND: The ultimate goal of this work was to detect the role of transcription factors (TFs) concordantly expressed with genes related to programmed cell death (PCD) during PCD and salt stress. This work was based on the hypothesis that TFs and their driven genes likely co-express under different stimuli. The conserved superfamily ethylene responsive factor (AP2/ERF) draw attention of the present study as it participates in the response to biotic and abiotic stimuli as well as to program cell death (PCD)...
October 6, 2016: BMC Plant Biology
Wassim Ben Ameur, Sonia Ouerghi, Amira Dridi, Mouna Bousnina, Atef Ben Youssef, Tarek Kilani, Tahar Mestiri
The use of Cardiopulmonary bypass (CPB) and extracorporeal membrane oxygenator (ECMO) in patients suffering from Sickle cell disease (SCD) needs specific precautions. Whereas, no consensual protocols have been established to clarify therapeutic management. CASE REPORT A 7-year-old boy was admitted to the hospital for surgery of advanced endocarditis.  Major dyspnea, hemodynamic distress and fever were noted on physical examination. Biological tests exploring anaemia revealed Haemoglobin (Hb) S levels of 39...
April 2016: La Tunisie Médicale
Robrecht M A Vergauwe, Jino George, Thibault Chervy, James A Hutchison, Atef Shalabney, Vladimir Y Torbeev, Thomas W Ebbesen
In quantum electrodynamics, matter can be hybridized to confined optical fields by a process known as light-matter strong coupling. This gives rise to new hybrid light-matter states and energy levels in the coupled material, leading to modified physical and chemical properties. Here, we report for the first time the strong coupling of vibrational modes of proteins with the vacuum field of a Fabry-Perot mid-infrared cavity. For two model systems, poly(l-glutamic acid) and bovine serum albumin, strong coupling is confirmed by the anticrossing in the dispersion curve, the square root dependence on the concentration, and a vacuum Rabi splitting that is larger than the cavity and vibration line widths...
October 7, 2016: Journal of Physical Chemistry Letters
Atefe Abdolmanafi, Richard Glynn Owens, Sam Winter, Reza Ghorban Jahromi, Maria Manuela Peixoto, Pedro Nobre
INTRODUCTION: Recent studies have demonstrated the role of sexual dysfunctional beliefs, negative automatic thoughts, and emotional responses in relation to sexual functioning. Nevertheless, no studies seem to have evaluated the role of these cognitive-emotional factors in determining sexual dissatisfaction. AIM: To test a cognitive-emotional model of sexual dissatisfaction in women. METHODS: In total, 207 women answered questionnaires assessing sexual dissatisfaction and cognitive and emotional variables that might affect sexual dissatisfaction...
September 21, 2016: Journal of Sexual Medicine
Maha Kamel Ghanem, Hoda Ahmed Makhlouf, Ali Abdel-Azeem Hasan, Ahmed Atef Alkarn
BACKGROUND: Pulmonary thromboembolism (PTE) remains under-diagnosed fatal disease at emergency units suggesting the need for alternative, easy, and noninvasive bedside diagnostic approaches. OBJECTIVES: To determine the diagnostic role of gray-scale and color Doppler transthoracic ultasonography (TUS) in patients with PTE. PATIENTS AND METHODS: Blinded to 64 multi-detectors CT pulmonary angiography (MDCTPA) examination as a gold standard, 60 patients with clinically suspected PTE underwent gray-scale and then color Doppler TUS examination...
September 8, 2016: Clinical Respiratory Journal
Mohamed H Al-Agamy, Katy Jeannot, Taghrid S El-Mahdy, Hassan A Samaha, Atef M Shibl, Patrick Plésiat, Patrice Courvalin
Background. This study described various molecular and epidemiological characters determining antibiotic resistance patterns in Pseudomonas aeruginosa isolates. Methods. A total of 34 carbapenem-resistant P. aeruginosa clinical isolates were isolated from samples collected at a tertiary hospital in Riyadh, Saudi Arabia, from January to December 2011. Susceptibility testing, serotyping, molecular characterization of carbapenem resistance, and pulsed-field gel electrophoresis (PFGE) were performed. Results. All isolates were resistant to ceftazidime, and more than half were highly resistant (minimum inhibitory concentration (MIC) > 256 mg/L)...
2016: Canadian Journal of Infectious Diseases & Medical Microbiology
Mohammad Kazem Atef Vahid, Mahboubeh Dadfar, Ahmed M Abdel-Khalek, David Lester
A love of life is defined as an overall positive attitude toward life and a liking for life. The present study was designed to evaluate the psychometric characteristics of a Persian version of the Love of Life Scale using a convenience sample of 145 Iranian female volunteer college students (M age = 23.0 years, SD = 3.4). The mean score on the Love of Life Scale was 61.08 (SD = 11.40). A principal component analysis with a Varimax rotation yielded two factors labeled (a) Positive Attitude Towards Life and Happy Consequences of Love of Life and (b) Meaningfulness of Life...
October 2016: Psychological Reports
Mohamed Kilani, Leila Njim, Atef Ben Nsir, Mohamed Nejib Hattab
Although neurological features are commonly encountered in Whipple's disease (WD), presentation with purely neurologic patterns is uncommon. Exclusive confinement to the central nervous system (CNS) is extremely rare. In these cases, the development of isolated cerebral mass is exceptional. In the present paper, the authors describe a case of a 68-year-old man who presented with partial seizures. The neurological examination was normal. The imaging showed a cystic lesion. This tumor-like lesion was removed by performing frontal craniotomy...
May 5, 2016: Turkish Neurosurgery
Ágnes Sonnevend, Akela Ghazawi, Manaf Alqahtani, Atef Shibl, Wafa Jamal, Rayhan Hashmey, Tibor Pal
OBJECTIVES: Searching for the presence of the mcr-1 gene in colistin resistant Enterobacteriaceae in countries of the Arabian Peninsula. METHODS: Seventy-five independent, colistin resistant Enterobacteriaceae strains isolated from clinical cases in Bahrain, Kuwait, Oman, Saudi Arabia and the United Arab Emirates were tested by PCR for the mcr-1 gene. mcr-1 positive strains were genotyped, and their antibiotic susceptibility was established. The mcr-1 containing plasmids were mobilized into Escherichia coli K-12 and their sequence was determined...
September 2016: International Journal of Infectious Diseases: IJID
Zeinab Abel Samad Ibrahim, Iman Hamed Elmaadawi, Basma Mourad Mohamed, Said Mohamed Abdou, Yasmina Ahmed El Attar, Amira Youssef, Maha Mostafa Shamloula, Atef Taha, Hala Gabr Metwally, Mohamed M El Afandy, Mohamed Labib Salem
BACKGROUND: Management of alopecia areata and androgenetic alopecia is often challenging as patients may be resistant to currently available modalities of treatment. The use of stem cells may be a novel option for resistant cases. OBJECTIVE: To evaluate the safety and efficacy of the use of autologous bone marrow derived mononuclear cells (including stem cells) as compared to follicular stems cells for the management of resistant cases of alopecia areata and androgenetic alopecia...
August 24, 2016: Journal of Dermatological Treatment
Osama Farouk, Dalia G Mahran, Hatem G Said, Mohamed M Alaa, Amr Atef Eisa, Galal Z Said, Heba Rashed, Azza Ez-Eldeen
INTRODUCTION: Despite abundant sunshine, hypovitaminosis D is common in the Middle East. The aim of this study was to determine the prevalence of hypovitaminosis D and related correlates among patients with hip fracture in Assiut University Hospitals in Upper Egypt. MATERIALS AND METHODS: A cross-sectional study was carried out in 133 patients with hip fracture, aged 50 years and older, admitted to Trauma Unit of Assiut University Hospitals, from January through December 2014...
September 2016: Geriatric Orthopaedic Surgery & Rehabilitation
Chunyuan Qiu, Maxime Cannesson, Atef Morkos, Vu T Nguyen, Diana LaPlace, Narendra S Trivedi, Armond Khachatourians, Joseph Rinehart, Zeev N Kain
BACKGROUND: In this article, we report on the implementation and impact of a Perioperative Surgical Home (PSH) model for the total knee arthroplasty at an integrated delivery system (Kaiser Permanente). METHODS: A multidisciplinary committee developed and implemented a series of PSH protocols that included the entire continuum of care from the decision for surgery until 30 days after surgery. Five hundred forty-six subjects were included in the preimplementation phase (Fast Track [T-fast]), and 518 patients were included in the postimplementation phase (PSH)...
September 2016: Anesthesia and Analgesia
Anoop Thomas, Jino George, Atef Shalabney, Marian Dryzhakov, Sreejith J Varma, Joseph Moran, Thibault Chervy, Xiaolan Zhong, Eloïse Devaux, Cyriaque Genet, James A Hutchison, Thomas W Ebbesen
The ground-state deprotection of a simple alkynylsilane is studied under vibrational strong coupling to the zero-point fluctuations, or vacuum electromagnetic field, of a resonant IR microfluidic cavity. The reaction rate decreased by a factor of up to 5.5 when the Si-C vibrational stretching modes of the reactant were strongly coupled. The relative change in the reaction rate under strong coupling depends on the Rabi splitting energy. Product analysis by GC-MS confirmed the kinetic results. Temperature dependence shows that the activation enthalpy and entropy change significantly, suggesting that the transition state is modified from an associative to a dissociative type...
September 12, 2016: Angewandte Chemie
Ayman El Nakeeb, Ehab Atef, Ehab El Hanafy, Ali Salem, Waleed Askar, Helmy Ezzat, Ahmed Shehta, Mohamed Abdel Wahab
BACKGROUND: Although the mortality and morbidity of pancreaticoduodenectomy (PD) have improved significantly over the past years, the concerns for elderly patients undergoing PD are still present. Furthermore, the frequency of PD is increasing because of the increasing proportion of elderly patients and the increasing incidence of periampullary tumors. This study aimed to analyze the outcomes of PD in elderly patients. METHODS: We studied all patients who had undergone PD in our center between January 1995 and February 2015...
August 2016: Hepatobiliary & Pancreatic Diseases International: HBPD INT
Fatma Masmoudi, Atef Bessadok, Mohamed Dammak, Mohamed Jaziri, Emna Ammar
The plastic materials used for packaging are increasing leading to a considerable amount of undegradable solid wastes. This work deals with the reduction of conventional plastics waste and the natural resources preservation by using cellulosic polymers from renewable resources (alfa and luffa). Plasticized starch films syntheses were achieved at a laboratory scale. These natural films showed some very attractive mechanical properties at relatively low plasticizers levels (12 to 17 % by weight). Furthermore, mixtures including polylactic acid polymer (PLA) and cellulose fibers extracted from alfa and luffa were investigated by melt extrusion technique...
August 3, 2016: Environmental Science and Pollution Research International
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