By increasing the proportion of water in the mobile phase the retention times and the relative retention of isomers
Sandia said the machine is able to distinguish isomers
that have "very different chemical characteristics," such as enols, which are "less-stable isomers
of other well-known combustion intermediates.
There are some 25 different chemical forms, or isomers
, of CLA, Jones points out.
Now, using ultrafast lasers, physicists at the University of Virginia in Charlottesville have observed that clusters randomly morph between different arrangements, or isomers
, many times within a nanosecond.
Fundamentals--"New hybrid process for purification and separation of MDI isomers
," Manfred Stepanski, Sulzer Chemtech Ltd.
In products such as Ritalin, one of the isomers
provides the benefit while the other produces side effects.
Two other chemical groups are attached to this hexagon, but each can attach at two different angles, resulting in four different versions, or optical isomers
The test which is commonly used for measuring methamphetamine must differentiate between the two isomers
and if, when tested, they are not separated, the possibility is that you will come up with a false positive fothe narcotic form of methamphetamine.
The earlier literature assigned the isomers
by relative GC retention times (Wigfield and Phelps 1974).
The spectra reveal a plethora of conformational isomers
, differing solely by rotation about the C-C single bonds.
In the amorphous state, PET has a more complex conformational composition and both trans and gauche isomers
of the above segment can be found [9, 13, 14].
a Wall Street wonder in 1998, has proven its ability to separate isomers
of conventional drug molecules.