Biocatalysis/Biodegradation Database:
University of Minnesota Biocatalysis/Biodegradation Database lists
microbial biocatalytic reactions and biodegradation pathways
primarily for xenobiotic, chemical compounds.
http://www.labmed.umn.edu/umbbd/index.html
Engineering Power Tools:
Engineering software solves many common engineering problems quickly
and efficiently. Includes unit converter, and many frequently- used
data tables such as physical constants, properties of materials,
screw threads, and piping pressure drop. Free downloads.
Win3.x/95/98/NT.
http://www.pwr-tools.com/
Fundamental Physical Constants from NIST:
CODATA Internationally recommended values for a wide range of
physical parameters (speed of light, Avogadro's constant, masses of
elementary particles, Planck constant, and acceleration of gravity).
http://physics.nist.gov/cuu/Constants/index.html?
Erik Max Francis' physics pages:
Information on Kepler's laws, the laws list, illustrated orders of
magnitude, and a physics reference.
http://www.alcyone.com/max/physics/
RefScout:
A weekly, scientific reference mailing service. Screens databases
covering life and medical sciences for the key words or the
combination of key words specified and will automatically update
with any abstract that has come up during the last seven days. Free
service.
http://www.refscout.com/
Molecular Weight Calculation:
Web-based utility for finding the molecular weight of any chemical
for which you enter the formula.
http://www.chemie.fu-berlin.de/cgi-bin/molform
GrayLIT Network:
Provides a full-text search across the gray literature of multiple
government agencies within a science portal of technical reports.
http://www.osti.gov/graylit/
EquationSheet.com:
Searchable directory, arranged by field, of equations, constants,
symbols and SI units. Also features LaTEX utilities, software links.
http://www.equationsheet.com/
Physics and Science Reference by PhysLINK.com:
Physics / science reference, physical constants, online unit
conversions, periodic table of elements, exact time, fundamental
physical formulae and equations.
http://www.physlink.com/Reference/Index.cfm
Favorite Mathematical Constants:
Research-level essays about mathematical constants from Steven Finch
http://pauillac.inria.fr/algo/bsolve/constant/constant.html