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PassportCard is part of the Davidshield Group, an international travel insurance and private medical insurance focusing on markets in Germany, Australia and Israel. [1] [2] [3] Customers insured with PassportCard use a prepaid card to pay health service providers, eliminating the need to submit invoices or pay deductibles. [4]
The sol–gel approach is a cheap and low-temperature technique that allows the fine control of the product's chemical composition. Even small quantities of dopants, such as organic dyes and rare-earth elements , can be introduced in the sol and end up uniformly dispersed in the final product.
The sol-gel is then exposed to a certain indicator which becomes part of the sol-gel. Typically the production of a sol-gel follows a hydrolysis and then condensation pathway. Hydrolysis involves adding a hydrogen atom onto the gel. Condensation is a method involving bonding two different gel molecules together to create a sol-gel as a whole. [2]
The first step of the sol-gel process is the creation of a colloidal suspension of solid particles known as a "sol". The precursors are a liquid alcohol such as ethanol which is mixed with a silicon alkoxide , such as tetramethoxysilane (TMOS), tetraethoxysilane (TEOS), and polyethoxydisiloxane (PEDS) (earlier work used sodium silicates). [ 24 ]
A senior official at insurance industry body Lloyd’s Market Association said Israel is not on a commonly used list of high-risk areas for aviation, but that it made sense for underwriters to ...
The Journal of Sol-Gel Science and Technology is a monthly peer-reviewed scientific journal covering research on sol-gel materials. Recent findings on new products developed via chemical nanotechnology are also included. [1] According to the Journal Citation Reports, the Journal of Sol-Gel Science and Technology has a 2021 impact factor of 2. ...
This page was last edited on 24 January 2018, at 08:21 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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