Purestock/Purestock/Getty Images. Hydroxycitric acid, which comes from the Garcinia cambogia fruit, is often sold as a weight-loss supplement. The fruit itself is used as a condiment in Southeast Asian dishes, such as curries.In purified supplement form, hydroxycitric acid may cause some side effects, so check with your doctor before adding it to your daily regimen.he fruit itself is used as a condiment in Southeast Asian dishes, such as curries. In purified supplement form, hydroxycitric acid may cause some side effects, so check with your doctor before adding it to your daily regimen.
Why is liquid nitrogen used to fast freeze food instead of liquid oxygen? There are two reasons. First, liquid nitrogen is colder than liquid oxygen and thus more effective at flash freezing.
Nitrogen plasma and oxygen plasma provide similar results when used for plasma treatments. Basic surface activation and plasma cleaning processes use either oxygen or nitrogen plasma to raise the surface energy of a material. Whether oxygen or nitrogen plasma is used depends on what type of material is being treated. However, oxygen is usually more effective and is often the first choice for plasma treatments. Since air is composed of approximately 70% nitrogen and 30% oxygen, it is often used to perform plasma treatments as a less expensive, yet still very effective method.