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  2. So, You Have a Water Stain on Your Ceiling—Here's What a ...

    www.aol.com/water-stain-ceiling-heres-plumber...

    A water ring on your ceiling is a sign of a leak. We asked expert plumbers how to identify the source of the leak and solve the problem. So, You Have a Water Stain on Your Ceiling—Here's What a ...

  3. Soft washing - Wikipedia

    en.wikipedia.org/wiki/Soft_washing

    Soft washing is a cleaning method using low pressure water. More recently, the term "softwashing" has been used to describe any form of spraying chemicals at buildings where solutions (typically sodium hypochlorite based softwashing chemicals) are used to remove mildew, bacteria, algae and other organic stains from roofs and other building exteriors.

  4. Self-cleaning surfaces - Wikipedia

    en.wikipedia.org/wiki/Self-cleaning_surfaces

    Self-cleaning surfaces are a class of materials with the inherent ability to remove any debris or bacteria from their surfaces in a variety of ways. The self-cleaning functionality of these surfaces are commonly inspired by natural phenomena observed in lotus leaves, gecko feet, and water striders to name a few. The majority of self-cleaning ...

  5. Restoration of the Sistine Chapel frescoes - Wikipedia

    en.wikipedia.org/wiki/Restoration_of_the_Sistine...

    The ceiling before the restoration [c]. The preliminary experimentation for the modern restoration began in 1979. The restoration team comprised Gianluigi Colalucci, Maurizio Rossi, Piergiorgio Bonetti, and others, [6] who took as their guidelines the Rules for restoration of works of art as established in 1978 by Carlo Pietrangeli, director of the Vatican's Laboratory for the Restoration of ...

  6. Self-cleaning glass - Wikipedia

    en.wikipedia.org/wiki/Self-cleaning_glass

    The second class of self-cleaning surfaces are hydrophilic surfaces which do not rely solely on the flow of water to wash away dirt. These coatings chemically break down dirt when exposed to light, a process known as photocatalysis. Despite the commercialization of a hydrophilic self-cleaning coating in a number of products, the field is far ...

  7. San Francisco–Oakland Bay Bridge - Wikipedia

    en.wikipedia.org/wiki/San_Francisco–Oakland_Bay...

    The lights were switched off permanently at 8 pm on March 5, 2023 – the 10th anniversary of the artwork. This was done due to their poor condition and increasing costs to maintain properly. There is a plan to raise additional funds and install a new set of lights later in the year. [135]

  8. In-water surface cleaning - Wikipedia

    en.wikipedia.org/wiki/In-water_surface_cleaning

    In-water cleaning, also known as in-water surface cleaning, is a collection of methods for removing unwanted material in-situ from the underwater surface of a structure.. This often refers to removing marine fouling growth from ship hulls, but also has applications on civil engineering structures, pipeline intakes and similar components which are impossible or inconvenient to remove from the ...

  9. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    The monoblock type collects the water in a bucket or tray and stops when full. The air-to-air type re-evaporates the water, discharges it through the ducted hose, and can run continuously. Many but not all portable units draw indoor air and expel it outdoors through a single duct, negatively impacting their overall cooling efficiency.