Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Protein Adsorption into Mesopores: A Combination of Electrostatic
  Interaction, Counterion Release and van der Waals Forces   Bovine heart cytochrome c has been immobilized into the mesoporous silica
host material SBA-15 in both its native folded and urea-unfolded state. The
comparison of the two folding states' behavior casts doubt on the commonly used
explanation of cytochrome c adsorption, i.e. the electrostatic interaction
model. A detailed investigation of the protein binding as a function of pH and
ionic strength of the buffer solution reveals the complex nature of the
protein-silica interaction. Electrostatic interaction, van der Waals forces and
entropic contributions by counterion release each contribute to adsorption on
the silica pore walls.

36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga