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Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including: organic and inorganic compounds; dissolved and particulate matter; volatile ...
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out for a variety of ...
In order theory, an ultrafilter is a subset of a partially ordered set that is maximal among all proper filters. This implies that any filter that properly contains an ultrafilter has to be equal to the whole poset. Formally, if is a set, partially ordered by then. a subset is called a filter on if. is nonempty,
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In 1935, Lake Vilafro ( 15.203°S 71.880°W ), located at an altitude of 4,674 metres (15,335 ft) [16] was identified as the main source of the Amazon River. In 1969, Carlos Peñaherrera del Aguila, a prominent Peruvian geographer, was the first to label the Carhuasanta River (and the Lloqueta River) flowing down the Mismi Mountain in southern ...
The history of water filters can be traced to the earliest civilisations with written records. Water filters have been used throughout history to improve the safety and aesthetics of water intended to be used for drinking or bathing. In modern times, they are also widely used in industry and commerce. The history of water filtration is closely ...
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