There's no set answer to how long the battery charge will last - it all depends on what you're doing with the tablet. Actions such as connecting to the internet, playing games or movies and other complex tasks will consume power faster than more simple tasks like writing emails or reading an ebook.
THE EFFECT OF CHANGING CONDITIONS IN ENZYME CATALYSIS This page looks at the effect of changing substrate concentration, temperature and pH on reactions involving enzymes. It follows on from a page describing in simple terms how enzymes function as catalysts.
PH changes affect the structure of an enzyme molecule and therefore. affect its ability to bind with its substrate molecules. Changes in pH. affect the ionic bonds and hydrogen bonds that hold the enzyme. together, which naturally affects the rate of reaction of the enzyme. with the substrate.he optimum pH for most enzymes is pH7. In the body, amylase works mainly in the small intestines, where the. acidity from the stomach has been neutralised by the hydrogencarbonate. ions in the pancreatic juices secreted by the pancreas.