Results 61 to 70 of about 189,401 (272)
Advanced Functional Materials, EarlyView.Surface‐attached multilayer micromagnet systems are fabricated by two‐photon crosslinking. The pillar‐shaped micro actuators consist of a soft and flexible surface‐attached cell‐repellent hydrogel layer at the bottom, acting as a hinge and a cell‐adhesive hydrophobic polymer filled with magnetic nanoparticles.
Nicolas Geid +5 more
wiley +1 more source
The prevalence of uncorrected refractive errors in underserved rural areas
Journal of Current Ophthalmology, 2017 Purpose: To determine the prevalence of uncorrected refractive errors, need for spectacles, and the determinants of unmet need in underserved rural areas of Iran.
Hassan Hashemi +4 more
doaj
Polar Pore Surface of Polyamide Membranes Enabling Efficient Solvent Mixture Separation
Advanced Functional Materials, EarlyView.A polyamide membrane with polar pore surfaces and relatively large pore is fabricated through interfacial polymerization between polyethyleneimine and trimesoyl chloride. Rapid separation of solvents with polarity differences is achieved by the synergistic effects of pore polarity and size sieving.
Aiwen Zhang +10 more
wiley +1 more source
Studying of refractive index measurements in reflected light [PDF]
arXiv, 2010 Two methods of refractometry in reflected light from optical surface of samples are considered and studied experimentally. Methods are grounded on results of Fresnel theory of concerning light reflectivity at near normal incidence and Brewster angle. Sources of errors for both methods were considered and possibility of measuring of the refractive index
arxiv
Advanced Functional Materials, EarlyView.Symmetry‐broken plasmonic nanoantenna arrays achieve broadband multiresonant enhancement of second harmonic generation (SHG), third harmonic generation (THG), and upconversion photoluminescence (UCPL), under femtosecond laser excitation across the near‐infrared range (1000–1600 nm).
Elieser Mejia +9 more
wiley +1 more source
Journal of Current Ophthalmology, 2018 Purpose: The aim of this study was to analyze and compare corneal endothelial cell morphology and characteristics in bilateral keratoconus (KCN) patients with unilateral Vogt's striae. Methods: Fifty patients aged 20–38 years were recruited in this cross-
Hadi Ostadi-moghaddam +5 more
doaj
Refractive Errors Among Medical Students
Nepalese Medical Journal, 2018 Introduction: Refractive errors are becoming a problem in many societies, with prevalence rates of myopia in many Asian urban countries reaching epidemic proportions.
Poojyashree Karki +3 more
doaj +1 more source
STATE OF CONTRAST SENSITIVITY IN ASTIGMATISM IN SCHOOL-AGE CHILDREN
Вісник проблем біології і медицини, 2020 Objective. To determine the significance of changes in contrast sensitivity in the diagnosis of refractive errors in students of different ages. Object and methods of research.
Kharchenko L. L. +3 more
doaj +1 more source
Modelling phase imperfections in compound refractive lenses [PDF]
, 2019 Compound refractive lenses (CRL) offer outstanding potential for probe formation in X-ray micro- and nano-analysis as well as for imaging applications, but effective aberration-free focusing of X-rays is a key consideration when high spatial resolution and intensities are required.
arxiv +1 more source