Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Microrheology of viscoelastic solutions studied by magnetic rotational
  spectroscopy   Magnetic rotational spectroscopy is based on the use of magnetic micron-size
wires for viscosity measurements. Submitted to a rotational magnetic field with
increasing frequency, the wires undergo a hydrodynamic instability between a
synchronous and an asynchronous regime. From a comparison between predictions
and experiments, the static shear viscosity and elastic modulus of wormlike
micellar solutions are here determined. The values agree with the determination
by cone-and-plate rheometry.

26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org