Riesling grapes are naturally very high in acid, and the cool, northern climate of Germany means this ripping acid stays in the grapes even into the fall harvest season. So winemakers let the fermentations stop before the wine is completely dry, retaining a little sweetness in order to strike balance in the wine.
Oxygenation refers to the process of adding oxygen to the body system. There is no way to reliably measure arterial oxygenation via clinical signs alone. Cyanosis, pallor and other physical findings are not reliable.
Glycolysis is a metabolic process that yields ATP. You should note that an oxidation step, using NAD as the oxidizing agent, occurs in this metabolic sequence. Molecular oxygen is not used anywhere in this process and this is why glycolysis is described as an anaerobic process. Glycolysis can in fact occur in the presence of molecular oxygen, as is seen in the erythrocyte, but oxygen is not needed for this process and can not be used even if it is present. You will see that in this scheme lactate is the product of this route for the anaerobic use of glucose for ATP synthesis.