Results 141 to 150 of about 2,886,375 (397)

Design and Applications of Multi‐Frequency Programmable Metamaterials for Adaptive Stealth

open access: yesAdvanced Functional Materials, EarlyView.
This article provides a comprehensive overview of metamaterials, including their fundamental principles, properties, synthesis techniques, and applications in stealth, as well as their challenges and future prospects. It covers topics that are more advanced than those typically discussed in existing review articles, while still being closely connected ...
Jonathan Tersur Orasugh   +4 more
wiley   +1 more source

Kokeilisitko kovia? : opas kovien korneaalisten piilolinssien sovitukseen [PDF]

open access: yes, 2014
Opinnäytetyön tarkoituksena on tuottaa opas kovien sfääristen, korneaalisten happea läpäisevien (RGP) piilolinssien sovitukseen. Opas on tarkoitettu laillistettujen piilolinssioptikoiden ja silmälääkäreiden käyttöön. Aihe on ajankohtainen, koska nykyiset
Alho, Noora   +2 more
core  

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz   +3 more
wiley   +1 more source

Contact Lenses - A Review

open access: yesIndian Journal of Ophthalmology, 1987
A review of recent literature on contact lenses shows increasingly more studies on soft contact lenses than PMMA hard lenses The articles on contact lens wear and ulcerative keratitis have highlighted the increased risk of microbial keratitis in contact ...
Dada V, Sharma Rajiv
doaj  

Impact of contact lens hygiene risk factors on the prevalence of contact lens-related keratitis in Alexandria-Egypt

open access: yesJournal of Ophthalmic Inflammation and Infection
Background This study aimed at measuring the effect of contact lens hygiene risk factors on the prevalence of contact lens-related keratitis and identifying the specific risk factors to both microbial and non-microbial keratitis independently.
Suzan Ibrahim Sakr   +9 more
doaj   +1 more source

Instrumentation for Measurement of Gas Permeability of Polymeric Membranes [PDF]

open access: yes, 1993
A mass spectrometric 'Dynamic Delta' method for the measurement of gas permeability of polymeric membranes has been developed. The method is universally applicable for measurement of the permeability of any gas through polymeric membrane materials.
Brown, Kenneth G.   +3 more
core   +1 more source

Liquid Metals as Initiators of Free‐Radical Polymerization of Hydrogels: A Perspective

open access: yesAdvanced Functional Materials, EarlyView.
Gallium‐based liquid metals initiate free radical polymerization to form hydrogels without the use of toxic molecular initiators. In addition to initiating polymerization, they can act as crosslinkers, yielding softer, more extensible, and tougher hydrogels than those formed with conventional initiators.
Syed Ahmed Jaseem   +8 more
wiley   +1 more source

Wafer‐Scale Integration of α‐quartz Thin Films toward Super High Frequency Piezoelectric bioNEMS for Chikungunya Virus Detection

open access: yesAdvanced Functional Materials, EarlyView.
Epitaxial piezoelectric α‐quartz/Si BioNEMS sensors, made using soft chemistry, effectively detect the Chikungunya virus. They have a mass sensitivity of 205 pg Hz−1 in liquid and can detect the virus at a limit of 9 ng mL−1. This development enables high‐frequency mass devices for point‐of‐care testing in healthcare and other electronic applications ...
Raissa Rathar   +12 more
wiley   +1 more source

Deposition of Triglyceride on Soft Contact Lenses from Lipid-Containing Artificial Tears

open access: yesSiriraj Medical Journal, 2016
Objective: To determine the amount of triglyceride deposition from a lipid-containing artificial tear eye drop (Endura® ) on three different types of contact lenses after one day and one month of simulated use.
Atiporn Thuangtong   +4 more
doaj   +2 more sources

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