The two major forms of calcium are calcium carbonate and calcium citrate. Calcium supplements are intended to be consumed with a meal, and when taken as directed, the two forms of calcium are absorbed at roughly the same rate. However, when taken on an empty stomach, the body has a much easier time absorbing calcium in its citrate form vs. its carbonate form. Calcium lactate and calcium stearate are two alternative forms of calcium. Calcium lactate is expected to have similar effects as calcium citrate.
PHYSICAL FACTORS THAT AFFECT MICROBIAL GROWTH. TEMPERATURE. Generally,an increase in temperature will increase enzyme activity. But if temperatures get too high, enzyme activity will diminish and the protein (the enzyme) will denature. On the other hand, lowering temperature will decrease enzyme activity. At freezing temperatures enzyme activity can stop. Repeated cycles of freezing and thawing can denature proteins.
Bacterial growth, like yeast, is affected by moisture, ph, temperature, food supply, salt, sugar, oxygen supply and light. Most bacteria grow well in moist environments with temperatures ranging between 25-40C. However, some like it colder (just over freezing) and some like it hot (60-80C). Bacteria thrive at a pH around neutrality (6.5- 8.0). Most chemicals will kill bacteria. Since bacteria will not grow in mediums with large amounts of salt, salt plays a contributing factor to the leavening of sourdough bread.