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2. Iridescence - Wikipedia

   en.wikipedia.org/wiki/Iridescence

   [2] [3] It is often caused by multiple reflections from two or more semi-transparent surfaces in which phase shift and interference of the reflections modulates the incidental light, by amplifying or attenuating some frequencies more than others. [2] [4] The thickness of the layers of the material determines the interference pattern.

3. Arylide yellow - Wikipedia

   en.wikipedia.org/wiki/Arylide_Yellow

   These pigments are usually semi-transparent and range from orange-yellow to yellow-greens. Related organic pigments are the diarylide pigments. Overall, these pigments have partially displaced the toxic cadmium yellow in the marketplace. Painters such as Alexander Calder and Jackson Pollock are known to have employed arylide yellow in their ...

4. Pavement light - Wikipedia

   en.wikipedia.org/wiki/Pavement_light

   The glass in many old pavement lights is now either purple or straw-colored. This is a side-effect of the manufacturing process. Pure silica glass is transparent, but older glass manufacture often used silica from sand, which contains iron and other impurities. [29] Iron produces a greenish tint in the finished glass.

5. News, Politics, Sports, Mail & Latest Headlines - AOL.com

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   Get breaking news and the latest headlines on business, entertainment, politics, world news, tech, sports, videos and much more from AOL

6. Flood management - Wikipedia

   en.wikipedia.org/wiki/Flood_management

   Flood management describes methods used to reduce or prevent the detrimental effects of flood waters. Flooding can be caused by a mix of both natural processes, such as extreme weather upstream, and human changes to waterbodies and runoff. Flood management methods can be either of the structural type (i.e. flood control) and of the non ...

7. Staining - Wikipedia

   en.wikipedia.org/wiki/Staining

   A Ziehl–Neelsen stain is an acid-fast stain used to stain species of Mycobacterium tuberculosis that do not stain with the standard laboratory staining procedures such as Gram staining. This stain is performed through the use of both red coloured carbol fuchsin that stains the bacteria and a counter stain such as methylene blue .