October 20, 2007. Doujinshi manga (often shortened to doujin) are non-professional and/or self published comics. Doujinshi manga can be broken into two broad categories: fan-comics and original works. Fan-comics, much like fan-fiction, are based on established properties and created by fans of those properties. Original works are based on the doujinshi-ka's (creator) original ideas.
What is Purchasing Power Parity (PPP)? Why is it important? Purchasing power parity (PPP) is an economic term that calculates the relative value of different currencies.
 Phospholipids are important because they are amphipathic, in other  words the two ends of the molecule are different; the fatty acids  form a hydrophobic region, whereas the phosphate is hydrophilic.o, they are called phospholipids because they are made of lipids  and phosphate group. Most phospholipids contain a diglyceride, a  phosphate group, and a simple organic mo â¦ lecule such as choline. Johnellishartford. 14,297 Contributions.