http://en.wikipedia.org/wiki/Water_purification
http://en.wikipedia.org/wiki/Rare_earth_element
http://en.wikipedia.org/wiki/Actuator
http://en.wikipedia.org/wiki/Squamous-cell_carcinoma
http://en.wikipedia.org/wiki/Yeast
http://en.wikipedia.org/wiki/Hydroponics
http://en.wikipedia.org/wiki/Sensor
http://en.wikipedia.org/wiki/Respiratory_disease
http://en.wikipedia.org/wiki/Adsorption#Adsorbents
http://en.wikipedia.org/wiki/Woodworking_machine
http://en.wikipedia.org/wiki/Cell_membrane#Lipids
http://en.wikipedia.org/wiki/Ceramic
Structural skeleton
http://en.wikipedia.org/wiki/Vegetation
http://en.wikipedia.org/wiki/Electrolyte#Solid_electrolytes
http://en.wikipedia.org/wiki/Cell_membrane#Permeability
http://en.wikipedia.org/wiki/Fluoride
http://en.wikipedia.org/wiki/Transparent_conducting_film
http://en.wikipedia.org/wiki/Exhaust_gas