7 ▁ ▁Gallery ▁ ▁References ▁ ▁* ▁Category : Or th optera ▁families ▁Category : Or th optera ▁of ▁Africa <0x0A> </s> ▁Gl ă v ile ▁is ▁a ▁commune ▁in ▁V â l ce a ▁County , ▁Roman ia . ▁It ▁is ▁composed ▁of ▁five ▁villages : ▁An ino asa , ▁Gl ă v ile , ▁J aro ște a , ▁Ol te an ca , ▁and ▁Vo ic ule asa . ▁ ▁References ▁ ▁Category : Comm unes ▁in ▁V â l ce a ▁County <0x0A> </s> ▁In ▁chem istry , ▁bases ▁are ▁subst ances ▁that , ▁in ▁a que ous ▁solution , ▁release ▁hydro x ide ▁( OH − ) ▁ ions , ▁are ▁sli pp ery ▁to ▁the ▁touch , ▁can ▁taste ▁bitter ▁if ▁an ▁alk ali , ▁change ▁the ▁color ▁of ▁indic ators ▁( e . g ., ▁turn ▁red ▁lit mus ▁paper ▁blue ), ▁react ▁with ▁ac ids ▁to ▁form ▁sal ts , ▁promote ▁certain ▁chemical ▁re actions ▁( base ▁catal ysis ), ▁accept ▁pro tons ▁from ▁any ▁pro ton ▁don or ▁or ▁contain ▁completely ▁or ▁partially ▁dis place able ▁O H − ▁ ions . ▁Ex amples ▁of ▁bases ▁are ▁the ▁hydro x ides ▁of ▁the ▁alk ali ▁met als ▁and ▁the ▁al kal ine ▁earth ▁met als ▁( Na OH , ▁Ca ( OH ) 2 , ▁etc .— see ▁alk ali ▁hydro x ide ▁and ▁al kal ine ▁earth ▁hydro x ide ). ▁ ▁In ▁water , ▁by ▁alter ing ▁the ▁auto ion ization ▁equilibrium