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A nano reef is a type of marine aquarium that is typically less than 140 litres (30 Imperial gallons / 37 US gallons). The exact limit that distinguishes a nano reef from a regular reef is somewhat ill-defined. Some claim that anything less than 180 litres (40 Imperial gallons / 48 US gallons) would qualify.
Probability. Step-growth polymerization is a random process so we can use statistics to calculate the probability of finding a chain with x-structural units ("x-mer") as a function of time or conversion. Probability that an 'A' functional group has reacted. Probability of finding an 'A' unreacted.
Laminated glass is sometimes used, which combines the advantages of both glass and acrylic. [45] Today, most aquaria consist of glass panes bonded together by 100% silicone sealant, [46] with plastic frames attached to the upper and lower edges for decoration. The glass aquarium is standard for sizes up to about 1,000 litres (260 US gal; 220 ...
The Flory–Fox equation relates the number-average molecular weight, M n, to the glass transition temperature, T g, as shown below: =, where T g,∞ is the maximum glass transition temperature that can be achieved at a theoretical infinite molecular weight and K is an empirical parameter that is related to the free volume present in the polymer sample.
The major components are an aquarium, usually made from glass or acrylic, filtration equipment, lighting, and an aquarium heater. Marine aquariums can range in volume from less than 80 litres, (< 20 US gal) to over 1,200 litres (300 US gal). Small volumes are more difficult to maintain due to the more rapid changes in water chemistry.
Appearance. Shark Tunnel at the Georgia Aquarium. A shark tunnel (or aquarium tunnel, acrylic tunnel and exhibit tunnel) is an underwater tunnel that passes through an aquarium, typically with sharks and related aquatic life. They are usually made of thick acrylic glass.
Poly (methyl methacrylate) (PMMA) is the synthetic polymer derived from methyl methacrylate. It is used as an engineering plastic, and it is a transparent thermoplastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others (see below).
In polymer chemistry, the molar mass distribution (or molecular weight distribution) describes the relationship between the number of moles of each polymer species (Ni) and the molar mass (Mi) of that species. [1] In linear polymers, the individual polymer chains rarely have exactly the same degree of polymerization and molar mass, and there is ...
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