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Primary efflorescence is named such, as it typically occurs during the initial cure of a cementitious product. It often occurs on masonry construction, particularly brick, as well as some firestop mortars, when water moving through a wall or other structure, or water being driven out as a result of the heat of hydration as cement stone is being formed, brings salts to the surface that are not ...
Bacterial activity in sewers – anaerobic sulfate reduction at work in the organic-rich sludges accumulated under water in the conduits produces hydrogen sulfide gas (H 2 S). After its released in the air of the galleries, H 2 S is further oxidized into sulfuric acid by atmospheric oxygen .
A screw cap or closure is a common type of closure for bottles, jars, and tubes.. Common screw closures (from left to right): Plastic bottle with plastic screw cap, Dispensing closure for salad dressing (with inner seal), Break-away closure for syrup, Dispensing pump closure, Dispensing closure (with inner seal), Spray pump, Metal closure on glass jar, Child resistant closure, Cap on ...
A study found that more than 20% of reusable water bottles contained coliform bacteria, or fecal matter. Here's the best way to clean that bottle and avoid harmful germs. Like many people, Carl ...
A tamper-evident band or security ring serves as a tamper resistant or tamper evident function to a screw cap, lid, or closure. [1] The term tamper-proof is sometimes used but is considered a misnomer given that pilfering is still technically possible. [2] A security band can be integrated with the cap or can be a separate package component.
Run your tap water until it's almost too hot to the touch and place the edge of the lid under the stream. Make sure to get all sides, then dry the jar and lid with a kitchen towel or paper towel ...
An affected gastropod shell (a juvenile Agathistoma) from a museum collection. Byne's disease, more accurately known as Bynesian decay, is a peculiar and permanently damaging condition resulting from an ongoing chemical reaction which often attacks mollusk shells and other calcareous specimens that are in storage or on display for long periods of time.
Plastic rings will (hopefully) soon be eliminated. This hack might soon be an unnecessary relic of the past. Fortunately, many brands are making efforts to reduce or eliminate single-use items ...