Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mechanically induced helix-coil transition in biopolymer networks   The quasi-equilibrium evolution of the helical fraction occurring in a
biopolymer network (gelatin gel) under an applied stress has been investigated
by observing modulation in its optical activity. Its variation with the imposed
chain extension is distinctly non-monotonic and corresponds to the transition
of initially coiled strands to induced left-handed helices. The experimental
results are in qualitative agreement with theoretical predictions of helices
induced on chain extension. This new effect of mechanically stimulated
helix-coil transition has been studied further as a function of the elastic
properties of the polymer network: crosslink density and network aging.

30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys