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2. Iron-oxidizing bacteria - Wikipedia

   en.wikipedia.org/wiki/Iron-oxidizing_bacteria

   The anoxygenic phototrophic iron oxidation was the first anaerobic metabolism to be described within the iron anaerobic oxidation metabolism. The photoferrotrophic bacteria use Fe 2+ as electron donor and the energy from light to assimilate CO 2 into biomass through the Calvin Benson-Bassam cycle (or rTCA cycle) in a neutrophilic environment (pH 5.5-7.2), producing Fe 3+ oxides as a waste ...

3. Portable water purification - Wikipedia

   en.wikipedia.org/wiki/Portable_water_purification

   Portable water purification devices are self-contained, easily transported units used to purify water from untreated sources (such as rivers, lakes, and wells) for drinking purposes. Their main function is to eliminate pathogens, and often also of suspended solids and some unpalatable or toxic compounds .

4. House (astrology) - Wikipedia

   en.wikipedia.org/wiki/House_(astrology)

   Every house system is dependent on the rotational movement of Earth on its axis, but there is a wide range of approaches to calculating house divisions and different opinions among astrologers over which house system is most accurate. [3] To calculate the houses, it is necessary to know the exact time, date, and location.

5. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

6. Residential water use in the U.S. and Canada - Wikipedia

   en.wikipedia.org/wiki/Residential_water_use_in...

   On average, in a household of average size (2.65 persons) 12.4 showers are taken each week. For comparison, a navy shower lasts only 2 minutes and can use less than 3 gallons (11.4 liters) of water. The most water-frugal approach is used by the crew of the International Space Station (ISS) who use less than 1 gallon (4 liters) to bathe. [13]

7. 6 Different Kinds of Salt and How to Use Them - AOL

   www.aol.com/6-different-kinds-salt-them...

   The most common are Celtic sea salt, Fleur de Sel from the French sea, and Hawaiian sea salt. Sea salt is less refined than conventional table salt, with retaining traces of minerals and ...