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Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria), and is used in industrial processes and the production of ...
Spanish postal codes were introduced on 1 July 1984, [1] when the Sociedad Estatal de Correos y Telégrafos introduced automated mail sorting. They consist of five numerical digits, [2] where the first two digits, ranging 01 to 52, correspond either to one of the 50 provinces of Spain or to one of the two autonomous cities on the African coast.
Particularly useful is relating how irreducible representations change under extension of scalars – for example, the representation of the cyclic group of order 4, given by rotation of the plane by 90°, is an irreducible 2-dimensional real representation, but on extension of scalars to the complex numbers, it split into 2 complex ...
Postal codes in Armenia 2-digit postcode areas of Armenia (defined through the first two postcode digits) Postal codes in Armenia consist of four digits. Until 1 April 2006, postal codes consisted of six digits. For example, the previous postal code for the Foreign Ministry was Yerevan 375010 and is now Yerevan 0010.
Area code 303 is the original area code of the NPA, as well as for the entire state, reduced in geographic extent over time. Area codes 720 and 983 were added in 1998 and 2022, respectively, to form an overlay complex for the area, meaning that the same geographic service area is served by all area codes and that ten-digit dialing is required ...
The domain name arpa is a top-level domain (TLD) in the Domain Name System (DNS) of the Internet. It is used predominantly for the management of technical network infrastructure. Prominent among such functions are the subdomains in-addr.arpa and ip6.arpa, which provide namespaces for reverse DNS lookup of IPv4 and IPv6 addresses, respectively. The name originally was the acronym for the ...
Communities by provinces and territories of CanadaThis is a list of incorporated cities in Canada, in alphabetical order categorized by province or territory. More thorough lists of communities are available for each province.
Overlap extension polymerase chain reaction The overlap extension polymerase chain reaction (or OE-PCR) is a variant of PCR. It is also referred to as Splicing by overlap extension / Splicing by overhang extension (SOE) PCR. It is used to assemble multiple smaller double stranded DNA fragments into a larger DNA sequence.