Freebase(0.00 / 0 votes)Rate this definition: In Australian aboriginal mythology, Wala is a sun goddess who lived with her sister, Bara, and her sister-in-law, Madalait. Bara accompanied her across the sun every day, but Wala realized she made the earth too hot and made her stop. She journeyed to the southern mountains and brought back the sun.
Generally, the lower the pH, the higher the acidity in the wine. However, there is no direct connection between total acidity and pH (it is possible to find wines with a high pH for wine and high acidity).
An opened bottle of wine quickly begins to oxidize, losing its flavor and becoming undrinkable. Most wines oxidize after two or three days, although careful storage can extend the life up to about a week. Red and white wines with higher levels of acidity, such as Riesling or Sauvignon Blanc, oxidize less rapidly.