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Showing 1 to 12 of 215 entries
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Serum 25-hydroxyvitamin D predicts cognitive performance in adults.

Neuropsychiatric disease and treatment

Darwish H, Zeinoun P, Ghusn H, Khoury B, Tamim H, Khoury SJ.
PMID: 26346368
Neuropsychiatr Dis Treat. 2015 Aug 25;11:2217-23. doi: 10.2147/NDT.S87014. eCollection 2015.

BACKGROUND: Vitamin D is an endogenous hormone known to regulate calcium levels in the body and plays a role in cognitive performance. Studies have shown an association between vitamin D deficiency and cognitive impairment in older adults. Lebanon has...

Demonstration of a Circularly Polarized Plasma-Based Soft-X-Ray Laser.

Physical review letters

Depresseux A, Oliva E, Gautier J, Tissandier F, Lambert G, Vodungbo B, Goddet JP, Tafzi A, Nejdl J, Kozlova M, Maynard G, Kim HT, Phuoc KT, Rousse A, Zeitoun P, Sebban S.
PMID: 26340189
Phys Rev Lett. 2015 Aug 21;115(8):083901. doi: 10.1103/PhysRevLett.115.083901. Epub 2015 Aug 19.

We report the first experimental demonstration of a laser-driven circularly polarized soft-x-ray laser chain. It has been achieved by seeding a 32.8 nm Kr ix plasma amplifier with a high-order harmonic beam, which has been circularly polarized using a...

Injectable Hydrogels for Cardiac Tissue Repair after Myocardial Infarction.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

Hasan A, Khattab A, Islam MA, Hweij KA, Zeitouny J, Waters R, Sayegh M, Hossain MM, Paul A.
PMID: 27668147
Adv Sci (Weinh). 2015 Jul 15;2(11):1500122. doi: 10.1002/advs.201500122. eCollection 2015 Nov.

Cardiac tissue damage due to myocardial infarction (MI) is one of the leading causes of mortality worldwide. The available treatments of MI include pharmaceutical therapy, medical device implants, and organ transplants, all of which have severe limitations including high...

Corrigendum: Indirect excitation of ultrafast demagnetization.

Scientific reports

Vodungbo B, Tudu B, Perron J, Delaunay R, Müller L, Berntsen MH, Grübel G, Malinowski G, Weier C, Gautier J, Lambert G, Zeitoun P, Gutt C, Jal E, Reid AH, Granitzka PW, Jaouen N, Dakovski GL, Moeller S, Minitti MP, Mitra A, Carron S, Pfau B, von Korff Schmising C, Schneider M, Eisebitt S, Lüning J.
PMID: 26942306
Sci Rep. 2016 Mar 04;6:21727. doi: 10.1038/srep21727.

No abstract available.

Fourier transform holography with high harmonic spectra for attosecond imaging applications.

Optics letters

Williams GO, Gonzalez AI, Künzel S, Li L, Lozano M, Oliva E, Iwan B, Daboussi S, Boutu W, Merdji H, Fajardo M, Zeitoun P.
PMID: 26125403
Opt Lett. 2015 Jul 01;40(13):3205-8. doi: 10.1364/OL.40.003205.

We demonstrate a method of using a Fourier holographic technique to utilize attosecond soft x-ray pulses to image nanometer-scale objects. A discrete frequency comb of laser-generated high-order harmonics, yielding a train of attosecond pulses, has been used to record...

Evaluation of area-based collagen scoring by nonlinear microscopy in chronic hepatitis C-induced liver fibrosis.

Biomedical optics express

Sevrain D, Dubreuil M, Dolman GE, Zaitoun A, Irving W, Guha IN, Odin C, Le Grand Y.
PMID: 25909005
Biomed Opt Express. 2015 Mar 11;6(4):1209-18. doi: 10.1364/BOE.6.001209. eCollection 2015 Apr 01.

In this paper we analyze a fibrosis scoring method based on measurement of the fibrillar collagen area from second harmonic generation (SHG) microscopy images of unstained histological slices from human liver biopsies. The study is conducted on a cohort...

Wavefront improvement in an injection-seeded soft x-ray laser based on a solid-target plasma amplifier.

Optics letters

Li L, Wang Y, Wang S, Oliva E, Yin L, Le TT, Daboussi S, Ros D, Maynard G, Sebban S, Hu B, Rocca JJ, Zeitoun P.
PMID: 24321908
Opt Lett. 2013 Oct 15;38(20):4011-4. doi: 10.1364/OL.38.004011.

The wavefront of an injection-seeded soft x-ray laser beam generated by amplification of high-harmonic pulses in a λ=18.9 nm molybdenum plasma amplifier was measured by a Hartmann wavefront sensor with an accuracy of λ/32 root mean square (rms). A...

USE OF SPATIOTEMPORAL GAIT PARAMETERS TO DETERMINE RETURN TO SPORTS AFTER ACL RECONSTRUCTION.

Acta ortopedica brasileira

Leporace G, Metsavaht L, Zeitoune G, Marinho T, Oliveira T, Pereira GR, Oliveira LP, Batista LA.
PMID: 26981039
Acta Ortop Bras. 2016 Mar-Apr;24(2):73-6. doi: 10.1590/1413-785220162402147450.

OBJECTIVE: : To compare gait spatiotemporal parameters of healthy and ACL reconstructed subjects in order to classify the status of gait normality.METHODS: : Fourteen healthy subjects and eight patients submitted to ACL reconstruction walked along a walkway while the...

Prevalence and correlates of ADHD among adolescents in a Beirut community sample: results from the BEI-PSY Study.

Child and adolescent psychiatry and mental health

Ghossoub E, Ghandour LA, Halabi F, Zeinoun P, Shehab AAS, Maalouf FT.
PMID: 28428817
Child Adolesc Psychiatry Ment Health. 2017 Apr 17;11:20. doi: 10.1186/s13034-017-0156-5. eCollection 2017.

BACKGROUND: This study aims to investigate the prevalence, correlates and treatment seeking behavior related to ADHD among adolescents from Lebanon.METHODS: Five hundred and ten adolescents were recruited through multistage stratified cluster sampling of households in Beirut, and separately interviewed...

Indicators of a Reduced Intercarotid Artery Distance in Patients Undergoing Endoscopic Transsphenoidal Surgery.

Journal of neurological surgery. Part B, Skull base

Mascarella MA, Forghani R, Di Maio S, Sirhan D, Zeitouni A, Mohr G, Tewfik MA.
PMID: 26225301
J Neurol Surg B Skull Base. 2015 Jun;76(3):195-201. doi: 10.1055/s-0034-1396601. Epub 2015 Jan 05.

Objective To identify clinicopathologic factors associated with a reduced intercarotid distance (ICD) and subgroups at risk for internal carotid artery injury during transsphenoidal surgery. Design A retrospective case-control study. Setting This study was conducted at the McGill University Health...

Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers.

Optics express

Mahieu B, Gauthier D, De Ninno G, Dacasa H, Lozano M, Rousseau JP, Zeitoun P, Garzella D, Merdji H.
PMID: 26191828
Opt Express. 2015 Jul 13;23(14):17665-74. doi: 10.1364/OE.23.017665.

We present a setup for complete characterization of femtosecond pulses generated by seeded free-electron lasers (FELs) in the extreme-ultraviolet spectral region. Two delayed and spectrally shifted replicas are produced and used for spectral phase interferometry for direct electric field...

Gain dynamics in quickly ionized plasma for seeded operated soft x-ray lasers.

Optics letters

Guilbaud O, Cojocaru GV, Li L, Delmas O, Ungureanu RG, Banici RA, Kazamias S, Cassou K, Neveu O, Demailly J, Baynard E, Pittman M, Le Marec A, Klisnick A, Zeitoun P, Ursescu D, Ros D.
PMID: 26469617
Opt Lett. 2015 Oct 15;40(20):4775-8. doi: 10.1364/OL.40.004775.

Harmonic seeded operation of a neon-like titanium plasma-based soft x-ray laser is described. The plasma amplifier is pumped with a variation of the grazing incidence technique involving a fast and localized ionization step. We discuss its effect on gain...

Showing 1 to 12 of 215 entries