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2. Nickel - Wikipedia

   en.wikipedia.org/wiki/Nickel

   Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slow to react with air under standard conditions because a passivation layer of nickel oxide forms on the surface that prevents further corrosion. Even so ...

3. Single crystal - Wikipedia

   en.wikipedia.org/wiki/Single_crystal

   Single crystal. In materials science, a single crystal (or single-crystal solid or monocrystalline solid) is a material in which the crystal lattice of the entire sample is continuous and unbroken to the edges of the sample, with no grain boundaries. [1] The absence of the defects associated with grain boundaries can give monocrystals unique ...

4. Photonic crystal - Wikipedia

   en.wikipedia.org/wiki/Photonic_crystal

   A photonic crystal is an optical nanostructure in which the refractive index changes periodically. This affects the propagation of light in the same way that the structure of natural crystals gives rise to X-ray diffraction and that the atomic lattices (crystal structure) of semiconductors affect their conductivity of electrons. Photonic crystals occur in nature in the form of structural ...

5. Nicol prism - Wikipedia

   en.wikipedia.org/wiki/Nicol_prism

   Nicol prism. A Nicol prism is a type of polarizer. It is an optical device made from calcite crystal used to convert ordinary light into plane polarized light. It is made in such a way that it eliminates one of the rays by total internal reflection, i.e. the ordinary ray is eliminated and only the extraordinary ray is transmitted through the ...

6. Eli Lilly Alzheimer's drug approved by US FDA - AOL

   www.aol.com/news/us-fda-approves-lillys...

   (Reuters) -The U.S. Food and Drug Administration on Tuesday approved Eli Lilly's treatment for early Alzheimer's, making it the second therapy for slowing progression of the brain-wasting disease ...

7. 20 useful and innovative gadgets to make life easier for ...

   www.aol.com/lifestyle/products-to-make-life...

   These days you'll find all kinds of useful and innovative products and gadgets to make life easier for the elderly. From a "dressing stick" that makes it easier for them to get dressed and ...