APIs are broadly categorised into two types – synthetic and natural. Synthetic APIs are further classified into innovative and generic synthetic APIs, based on the type of synthesis used.
Synthetic chemical APIs, also known as small molecules, constitute a large part of the pharmaceutical market, with many small molecule drugs commercially available in the market.http://www.yycindustry.com/

Background: In arid and semi-arid countries there are often large areas where groundwater is brackish and where people have to obtain water from irrigation canals for all uses, including domestic ones.
http://www.yby-irrigation.com/irrigation-filters/

To be honest, the flywheel, should not really be all that ‘oily’ in its role of providing a smooth transfer of power from the car’s engine to its drive-train. However, it is still likely to be quite grubby and, as such, is not a component with which most of us will ever have any direct contact. That is why we take our cars to the garage, to discover the ‘bad news’.
http://www.xtengineparts.com/

Belt Drives are a type of frictional drives used for transmitting powers from one shaft to another by means of pulleys which rotate at the same speed or at the different speed.
A belt drive is shown in the figure. It consists of two pulleys over which an endless belt it passed over them. The mechanical power or rotary motion is transmitted from the driving pulley to the driven pulley because of the frictional grip that exists between the belt and the pulley surface.
http://www.xhconveyorbelt.com/

Artificial food additives can be controversial, but they aren't as scary as they may sound.
As their name suggests, artificial food additives are synthetic ingredients added to food to enhance its color or flavor, extend its shelf life, or improve it in some way.
http://www.xazbbio.com/food-additives/