It can either refer to a person who is unreasonably afraid of water or something that repels water and doesn't mix well with it.
No, as the head is not hydrophobic, it is actually hydrophilic. However, the tail is hydrophobic.
No, ammonia is hydrophilic.
PLGA when unmodified does tend to be hydrophobic. However it can be modified to ensure that it is hydrophilic. The best approach to this would probably be to do a literature search which would be...
No it is hydrophilic as it contains no nonpolar groups which cause hydrophobicity. Matt