Results 31 to 40 of about 20,871 (293)

Study on the dimensional stability of modern impression materials [PDF]

open access: yesRomanian Journal of Stomatology, 2020
Objective. Comparative evaluation of the accuracy and dimensional stability of modern impression materials, given that often the casting is not done at a short interval after impression. Materials and methods.
Bogdan Mihai Gălbinașu   +4 more
doaj   +1 more source

Tribological behaviour of two kinds of typical hydrogel contact lenses in different lubricants

open access: yesBiosurface and Biotribology, 2019
Contact lenses have a special effect on the treatment of some eye diseases. The tribological behaviour of soft contact lenses considerably influences their clinical performance.
Dong Qin   +6 more
doaj   +1 more source

Design and fabrication of chemically robust three-dimensional microfluidic valves [PDF]

open access: yes, 2007
A current problem in microfluidics is that poly(dimethylsiloxane) (PDMS), used to fabricate many microfluidic devices, is not compatible with most organic solvents. Fluorinated compounds are more chemically robust than PDMS but, historically, it has been
Chen, Yan   +7 more
core   +2 more sources

Tear Strength Analysis of MDX4-4210 and A-2186 Silicones with Different Intrinsic Pigments Incorporated by Mechanical and Industrial Methods

open access: yesInternational Journal of Dentistry, 2019
Objective. The aim of this study was to evaluate the tear strength of MDX4-4210 and A-2186 silicones with different intrinsic pigments incorporated by mechanical and industrial methods, comparing nonaged and aged groups. Materials and Methods.
Marcelo Coelho Goiato   +6 more
doaj   +1 more source

Ex Vivo Human Skin is not a Barrier for Cyclic Siloxanes (Cyclic Silicones): Evidence of Diffusion, Bioaccumulation, and Risk of Dermal Absorption Using a New Validated GC-FID Procedure

open access: yesPharmaceutics, 2020
Cyclic methylsiloxanes D4, D5, D6 (also called cyclic silicones) are widely used in various dermatological products and cosmetics, both for children and adults.
Dominika Krenczkowska   +4 more
doaj   +1 more source

Physically Acting Treatments for Head Lice—Can We Still Claim They Are ‘Resistance Proof’?

open access: yesPharmaceutics, 2022
Head lice worldwide have developed resistance to insecticides, prompting the introduction of a range of alternative treatments including plant extracts and natural and synthetic oils.
Ian F. Burgess
doaj   +1 more source

Advanced materials used for development of lubricated compositions for die casting

open access: yesЛитьë и металлургия, 2019
The article presents the requirements for the lubricants used in die casting of non-ferrous alloys and polymer materials. The methodology for conducting research to determine the lubricating properties of materials, as well as the results of studies of ...
A. M. Mikhaltsov   +2 more
doaj   +1 more source

Characterization of mechanically recovered photovoltaic encapsulants and backsheets as potential feedstocks for pyrolysis chemical recycling

open access: yesEPJ Photovoltaics
Recovery and closed-loop recycling of materials from manufacturing or end-of-life photovoltaic modules is attracting increasing interest to access critical raw materials and limit waste and is supported by policies and funded innovation projects, in the ...
Grand Caroline   +4 more
doaj   +1 more source

Silicon carbide equipments for process intensification of silicon reactions. [PDF]

open access: yes, 2009
Bluestar Silicones, one of the worldwide leaders in silicones chemistry, proposes a R&D project, aiming to design new equipment for the transposition of batch to continuous processes. The safety and environmental issues linked to this type of chemicals,
Elgue, Sébastien   +5 more
core  

Silicon spintronics

open access: yesNature Materials, 2009
Worldwide efforts are underway to integrate semiconductors and magnetic materials, aiming to create a revolutionary and energy-efficient information technology in which digital data are encoded in the spin of electrons. Implementing spin functionality in silicon, the mainstream semiconductor, is vital to establish a spin-based electronics with ...
openaire   +3 more sources

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