Math search engine:

http://ams.rice.edu/mathscinet/search

http://www.ams.org/msnmain?screen=Review

Pre-print archive:

http://xxx.lanl.gov/

http://xxx.lanl.gov/archive/math

Search engines:

http://www.jstor.org/cgi-bin/jstor/gensearch

http://www.maths.usyd.edu.au

http://www.ncbi.nlm.nih.gov/PubMed/entrez/query.fcgi

Web of science/

Chemical Chirality . .

Physical Knot Theory: Knot Energies. Random Knotting . .

DNA Topology/Nanotechnology .

Human Brain Project .

Protein Folding .

Surface Reconstruction .

Fluid Mechanics, string theory, etc.